drm/i915: move modesetting core code under display/

Now that we have a new subdirectory for display code, continue by moving
modesetting core code.

display/intel_frontbuffer.h sticks out like a sore thumb, otherwise this
is, again, a surprisingly clean operation.

v2:
- don't move intel_sideband.[ch] (Ville)
- use tabs for Makefile file lists and sort them

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190613084416.6794-3-jani.nikula@intel.com

56 files changed, 51785 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/display/Makefile.header-test b/drivers/gpu/drm/i915/display/Makefile.header-test
index 61e06cbb4b32..fc7d4e5bd2c6 100644
--- a/drivers/gpu/drm/i915/display/Makefile.header-test
+++ b/drivers/gpu/drm/i915/display/Makefile.header-test
@@ -2,7 +2,7 @@
 # Copyright © 2019 Intel Corporation
 
 # Test the headers are compilable as standalone units
-header_test := $(notdir $(wildcard $(src)/*.h))
+header_test := $(notdir $(filter-out %/intel_vbt_defs.h,$(wildcard $(src)/*.h)))
 
 quiet_cmd_header_test = HDRTEST $@
       cmd_header_test = echo "\#include \"$(<F)\"" > $@
diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
new file mode 100644
index 000000000000..3456d33feb46
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel ACPI functions
+ *
+ * _DSM related code stolen from nouveau_acpi.c.
+ */
+
+#include <linux/pci.h>
+#include <linux/acpi.h>
+
+#include "i915_drv.h"
+#include "intel_acpi.h"
+
+#define INTEL_DSM_REVISION_ID 1 /* For Calpella anyway... */
+#define INTEL_DSM_FN_PLATFORM_MUX_INFO 1 /* No args */
+
+static const guid_t intel_dsm_guid =
+	GUID_INIT(0x7ed873d3, 0xc2d0, 0x4e4f,
+		  0xa8, 0x54, 0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c);
+
+static char *intel_dsm_port_name(u8 id)
+{
+	switch (id) {
+	case 0:
+		return "Reserved";
+	case 1:
+		return "Analog VGA";
+	case 2:
+		return "LVDS";
+	case 3:
+		return "Reserved";
+	case 4:
+		return "HDMI/DVI_B";
+	case 5:
+		return "HDMI/DVI_C";
+	case 6:
+		return "HDMI/DVI_D";
+	case 7:
+		return "DisplayPort_A";
+	case 8:
+		return "DisplayPort_B";
+	case 9:
+		return "DisplayPort_C";
+	case 0xa:
+		return "DisplayPort_D";
+	case 0xb:
+	case 0xc:
+	case 0xd:
+		return "Reserved";
+	case 0xe:
+		return "WiDi";
+	default:
+		return "bad type";
+	}
+}
+
+static char *intel_dsm_mux_type(u8 type)
+{
+	switch (type) {
+	case 0:
+		return "unknown";
+	case 1:
+		return "No MUX, iGPU only";
+	case 2:
+		return "No MUX, dGPU only";
+	case 3:
+		return "MUXed between iGPU and dGPU";
+	default:
+		return "bad type";
+	}
+}
+
+static void intel_dsm_platform_mux_info(acpi_handle dhandle)
+{
+	int i;
+	union acpi_object *pkg, *connector_count;
+
+	pkg = acpi_evaluate_dsm_typed(dhandle, &intel_dsm_guid,
+			INTEL_DSM_REVISION_ID, INTEL_DSM_FN_PLATFORM_MUX_INFO,
+			NULL, ACPI_TYPE_PACKAGE);
+	if (!pkg) {
+		DRM_DEBUG_DRIVER("failed to evaluate _DSM\n");
+		return;
+	}
+
+	connector_count = &pkg->package.elements[0];
+	DRM_DEBUG_DRIVER("MUX info connectors: %lld\n",
+		  (unsigned long long)connector_count->integer.value);
+	for (i = 1; i < pkg->package.count; i++) {
+		union acpi_object *obj = &pkg->package.elements[i];
+		union acpi_object *connector_id = &obj->package.elements[0];
+		union acpi_object *info = &obj->package.elements[1];
+		DRM_DEBUG_DRIVER("Connector id: 0x%016llx\n",
+			  (unsigned long long)connector_id->integer.value);
+		DRM_DEBUG_DRIVER("  port id: %s\n",
+		       intel_dsm_port_name(info->buffer.pointer[0]));
+		DRM_DEBUG_DRIVER("  display mux info: %s\n",
+		       intel_dsm_mux_type(info->buffer.pointer[1]));
+		DRM_DEBUG_DRIVER("  aux/dc mux info: %s\n",
+		       intel_dsm_mux_type(info->buffer.pointer[2]));
+		DRM_DEBUG_DRIVER("  hpd mux info: %s\n",
+		       intel_dsm_mux_type(info->buffer.pointer[3]));
+	}
+
+	ACPI_FREE(pkg);
+}
+
+static acpi_handle intel_dsm_pci_probe(struct pci_dev *pdev)
+{
+	acpi_handle dhandle;
+
+	dhandle = ACPI_HANDLE(&pdev->dev);
+	if (!dhandle)
+		return NULL;
+
+	if (!acpi_check_dsm(dhandle, &intel_dsm_guid, INTEL_DSM_REVISION_ID,
+			    1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
+		DRM_DEBUG_KMS("no _DSM method for intel device\n");
+		return NULL;
+	}
+
+	intel_dsm_platform_mux_info(dhandle);
+
+	return dhandle;
+}
+
+static bool intel_dsm_detect(void)
+{
+	acpi_handle dhandle = NULL;
+	char acpi_method_name[255] = { 0 };
+	struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
+	struct pci_dev *pdev = NULL;
+	int vga_count = 0;
+
+	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
+		vga_count++;
+		dhandle = intel_dsm_pci_probe(pdev) ?: dhandle;
+	}
+
+	if (vga_count == 2 && dhandle) {
+		acpi_get_name(dhandle, ACPI_FULL_PATHNAME, &buffer);
+		DRM_DEBUG_DRIVER("vga_switcheroo: detected DSM switching method %s handle\n",
+				 acpi_method_name);
+		return true;
+	}
+
+	return false;
+}
+
+void intel_register_dsm_handler(void)
+{
+	if (!intel_dsm_detect())
+		return;
+}
+
+void intel_unregister_dsm_handler(void)
+{
+}
diff --git a/drivers/gpu/drm/i915/display/intel_acpi.h b/drivers/gpu/drm/i915/display/intel_acpi.h
new file mode 100644
index 000000000000..1c576b3fb712
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_acpi.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_ACPI_H__
+#define __INTEL_ACPI_H__
+
+#ifdef CONFIG_ACPI
+void intel_register_dsm_handler(void);
+void intel_unregister_dsm_handler(void);
+#else
+static inline void intel_register_dsm_handler(void) { return; }
+static inline void intel_unregister_dsm_handler(void) { return; }
+#endif /* CONFIG_ACPI */
+
+#endif /* __INTEL_ACPI_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
new file mode 100644
index 000000000000..6b985e895a97
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -0,0 +1,438 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * DOC: atomic modeset support
+ *
+ * The functions here implement the state management and hardware programming
+ * dispatch required by the atomic modeset infrastructure.
+ * See intel_atomic_plane.c for the plane-specific atomic functionality.
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_plane_helper.h>
+
+#include "intel_atomic.h"
+#include "intel_drv.h"
+#include "intel_hdcp.h"
+#include "intel_sprite.h"
+
+/**
+ * intel_digital_connector_atomic_get_property - hook for connector->atomic_get_property.
+ * @connector: Connector to get the property for.
+ * @state: Connector state to retrieve the property from.
+ * @property: Property to retrieve.
+ * @val: Return value for the property.
+ *
+ * Returns the atomic property value for a digital connector.
+ */
+int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
+						const struct drm_connector_state *state,
+						struct drm_property *property,
+						u64 *val)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_digital_connector_state *intel_conn_state =
+		to_intel_digital_connector_state(state);
+
+	if (property == dev_priv->force_audio_property)
+		*val = intel_conn_state->force_audio;
+	else if (property == dev_priv->broadcast_rgb_property)
+		*val = intel_conn_state->broadcast_rgb;
+	else {
+		DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
+				 property->base.id, property->name);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * intel_digital_connector_atomic_set_property - hook for connector->atomic_set_property.
+ * @connector: Connector to set the property for.
+ * @state: Connector state to set the property on.
+ * @property: Property to set.
+ * @val: New value for the property.
+ *
+ * Sets the atomic property value for a digital connector.
+ */
+int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
+						struct drm_connector_state *state,
+						struct drm_property *property,
+						u64 val)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_digital_connector_state *intel_conn_state =
+		to_intel_digital_connector_state(state);
+
+	if (property == dev_priv->force_audio_property) {
+		intel_conn_state->force_audio = val;
+		return 0;
+	}
+
+	if (property == dev_priv->broadcast_rgb_property) {
+		intel_conn_state->broadcast_rgb = val;
+		return 0;
+	}
+
+	DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
+			 property->base.id, property->name);
+	return -EINVAL;
+}
+
+static bool blob_equal(const struct drm_property_blob *a,
+		       const struct drm_property_blob *b)
+{
+	if (a && b)
+		return a->length == b->length &&
+			!memcmp(a->data, b->data, a->length);
+
+	return !a == !b;
+}
+
+int intel_digital_connector_atomic_check(struct drm_connector *conn,
+					 struct drm_connector_state *new_state)
+{
+	struct intel_digital_connector_state *new_conn_state =
+		to_intel_digital_connector_state(new_state);
+	struct drm_connector_state *old_state =
+		drm_atomic_get_old_connector_state(new_state->state, conn);
+	struct intel_digital_connector_state *old_conn_state =
+		to_intel_digital_connector_state(old_state);
+	struct drm_crtc_state *crtc_state;
+
+	intel_hdcp_atomic_check(conn, old_state, new_state);
+
+	if (!new_state->crtc)
+		return 0;
+
+	crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
+
+	/*
+	 * These properties are handled by fastset, and might not end
+	 * up in a modeset.
+	 */
+	if (new_conn_state->force_audio != old_conn_state->force_audio ||
+	    new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
+	    new_conn_state->base.colorspace != old_conn_state->base.colorspace ||
+	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
+	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
+	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
+	    !blob_equal(new_conn_state->base.hdr_output_metadata,
+			old_conn_state->base.hdr_output_metadata))
+		crtc_state->mode_changed = true;
+
+	return 0;
+}
+
+/**
+ * intel_digital_connector_duplicate_state - duplicate connector state
+ * @connector: digital connector
+ *
+ * Allocates and returns a copy of the connector state (both common and
+ * digital connector specific) for the specified connector.
+ *
+ * Returns: The newly allocated connector state, or NULL on failure.
+ */
+struct drm_connector_state *
+intel_digital_connector_duplicate_state(struct drm_connector *connector)
+{
+	struct intel_digital_connector_state *state;
+
+	state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	__drm_atomic_helper_connector_duplicate_state(connector, &state->base);
+	return &state->base;
+}
+
+/**
+ * intel_crtc_duplicate_state - duplicate crtc state
+ * @crtc: drm crtc
+ *
+ * Allocates and returns a copy of the crtc state (both common and
+ * Intel-specific) for the specified crtc.
+ *
+ * Returns: The newly allocated crtc state, or NULL on failure.
+ */
+struct drm_crtc_state *
+intel_crtc_duplicate_state(struct drm_crtc *crtc)
+{
+	struct intel_crtc_state *crtc_state;
+
+	crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
+	if (!crtc_state)
+		return NULL;
+
+	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
+
+	crtc_state->update_pipe = false;
+	crtc_state->disable_lp_wm = false;
+	crtc_state->disable_cxsr = false;
+	crtc_state->update_wm_pre = false;
+	crtc_state->update_wm_post = false;
+	crtc_state->fb_changed = false;
+	crtc_state->fifo_changed = false;
+	crtc_state->wm.need_postvbl_update = false;
+	crtc_state->fb_bits = 0;
+	crtc_state->update_planes = 0;
+
+	return &crtc_state->base;
+}
+
+/**
+ * intel_crtc_destroy_state - destroy crtc state
+ * @crtc: drm crtc
+ * @state: the state to destroy
+ *
+ * Destroys the crtc state (both common and Intel-specific) for the
+ * specified crtc.
+ */
+void
+intel_crtc_destroy_state(struct drm_crtc *crtc,
+			 struct drm_crtc_state *state)
+{
+	drm_atomic_helper_crtc_destroy_state(crtc, state);
+}
+
+static void intel_atomic_setup_scaler(struct intel_crtc_scaler_state *scaler_state,
+				      int num_scalers_need, struct intel_crtc *intel_crtc,
+				      const char *name, int idx,
+				      struct intel_plane_state *plane_state,
+				      int *scaler_id)
+{
+	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
+	int j;
+	u32 mode;
+
+	if (*scaler_id < 0) {
+		/* find a free scaler */
+		for (j = 0; j < intel_crtc->num_scalers; j++) {
+			if (scaler_state->scalers[j].in_use)
+				continue;
+
+			*scaler_id = j;
+			scaler_state->scalers[*scaler_id].in_use = 1;
+			break;
+		}
+	}
+
+	if (WARN(*scaler_id < 0, "Cannot find scaler for %s:%d\n", name, idx))
+		return;
+
+	/* set scaler mode */
+	if (plane_state && plane_state->base.fb &&
+	    plane_state->base.fb->format->is_yuv &&
+	    plane_state->base.fb->format->num_planes > 1) {
+		struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+		if (IS_GEN(dev_priv, 9) &&
+		    !IS_GEMINILAKE(dev_priv)) {
+			mode = SKL_PS_SCALER_MODE_NV12;
+		} else if (icl_is_hdr_plane(dev_priv, plane->id)) {
+			/*
+			 * On gen11+'s HDR planes we only use the scaler for
+			 * scaling. They have a dedicated chroma upsampler, so
+			 * we don't need the scaler to upsample the UV plane.
+			 */
+			mode = PS_SCALER_MODE_NORMAL;
+		} else {
+			mode = PS_SCALER_MODE_PLANAR;
+
+			if (plane_state->linked_plane)
+				mode |= PS_PLANE_Y_SEL(plane_state->linked_plane->id);
+		}
+	} else if (INTEL_GEN(dev_priv) > 9 || IS_GEMINILAKE(dev_priv)) {
+		mode = PS_SCALER_MODE_NORMAL;
+	} else if (num_scalers_need == 1 && intel_crtc->num_scalers > 1) {
+		/*
+		 * when only 1 scaler is in use on a pipe with 2 scalers
+		 * scaler 0 operates in high quality (HQ) mode.
+		 * In this case use scaler 0 to take advantage of HQ mode
+		 */
+		scaler_state->scalers[*scaler_id].in_use = 0;
+		*scaler_id = 0;
+		scaler_state->scalers[0].in_use = 1;
+		mode = SKL_PS_SCALER_MODE_HQ;
+	} else {
+		mode = SKL_PS_SCALER_MODE_DYN;
+	}
+
+	DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
+		      intel_crtc->pipe, *scaler_id, name, idx);
+	scaler_state->scalers[*scaler_id].mode = mode;
+}
+
+/**
+ * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
+ * @dev_priv: i915 device
+ * @intel_crtc: intel crtc
+ * @crtc_state: incoming crtc_state to validate and setup scalers
+ *
+ * This function sets up scalers based on staged scaling requests for
+ * a @crtc and its planes. It is called from crtc level check path. If request
+ * is a supportable request, it attaches scalers to requested planes and crtc.
+ *
+ * This function takes into account the current scaler(s) in use by any planes
+ * not being part of this atomic state
+ *
+ *  Returns:
+ *         0 - scalers were setup succesfully
+ *         error code - otherwise
+ */
+int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
+			       struct intel_crtc *intel_crtc,
+			       struct intel_crtc_state *crtc_state)
+{
+	struct drm_plane *plane = NULL;
+	struct intel_plane *intel_plane;
+	struct intel_plane_state *plane_state = NULL;
+	struct intel_crtc_scaler_state *scaler_state =
+		&crtc_state->scaler_state;
+	struct drm_atomic_state *drm_state = crtc_state->base.state;
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(drm_state);
+	int num_scalers_need;
+	int i;
+
+	num_scalers_need = hweight32(scaler_state->scaler_users);
+
+	/*
+	 * High level flow:
+	 * - staged scaler requests are already in scaler_state->scaler_users
+	 * - check whether staged scaling requests can be supported
+	 * - add planes using scalers that aren't in current transaction
+	 * - assign scalers to requested users
+	 * - as part of plane commit, scalers will be committed
+	 *   (i.e., either attached or detached) to respective planes in hw
+	 * - as part of crtc_commit, scaler will be either attached or detached
+	 *   to crtc in hw
+	 */
+
+	/* fail if required scalers > available scalers */
+	if (num_scalers_need > intel_crtc->num_scalers){
+		DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
+			num_scalers_need, intel_crtc->num_scalers);
+		return -EINVAL;
+	}
+
+	/* walkthrough scaler_users bits and start assigning scalers */
+	for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
+		int *scaler_id;
+		const char *name;
+		int idx;
+
+		/* skip if scaler not required */
+		if (!(scaler_state->scaler_users & (1 << i)))
+			continue;
+
+		if (i == SKL_CRTC_INDEX) {
+			name = "CRTC";
+			idx = intel_crtc->base.base.id;
+
+			/* panel fitter case: assign as a crtc scaler */
+			scaler_id = &scaler_state->scaler_id;
+		} else {
+			name = "PLANE";
+
+			/* plane scaler case: assign as a plane scaler */
+			/* find the plane that set the bit as scaler_user */
+			plane = drm_state->planes[i].ptr;
+
+			/*
+			 * to enable/disable hq mode, add planes that are using scaler
+			 * into this transaction
+			 */
+			if (!plane) {
+				struct drm_plane_state *state;
+				plane = drm_plane_from_index(&dev_priv->drm, i);
+				state = drm_atomic_get_plane_state(drm_state, plane);
+				if (IS_ERR(state)) {
+					DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
+						plane->base.id);
+					return PTR_ERR(state);
+				}
+
+				/*
+				 * the plane is added after plane checks are run,
+				 * but since this plane is unchanged just do the
+				 * minimum required validation.
+				 */
+				crtc_state->base.planes_changed = true;
+			}
+
+			intel_plane = to_intel_plane(plane);
+			idx = plane->base.id;
+
+			/* plane on different crtc cannot be a scaler user of this crtc */
+			if (WARN_ON(intel_plane->pipe != intel_crtc->pipe))
+				continue;
+
+			plane_state = intel_atomic_get_new_plane_state(intel_state,
+								       intel_plane);
+			scaler_id = &plane_state->scaler_id;
+		}
+
+		intel_atomic_setup_scaler(scaler_state, num_scalers_need,
+					  intel_crtc, name, idx,
+					  plane_state, scaler_id);
+	}
+
+	return 0;
+}
+
+struct drm_atomic_state *
+intel_atomic_state_alloc(struct drm_device *dev)
+{
+	struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
+
+	if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
+		kfree(state);
+		return NULL;
+	}
+
+	return &state->base;
+}
+
+void intel_atomic_state_clear(struct drm_atomic_state *s)
+{
+	struct intel_atomic_state *state = to_intel_atomic_state(s);
+	drm_atomic_state_default_clear(&state->base);
+	state->dpll_set = state->modeset = false;
+}
+
+struct intel_crtc_state *
+intel_atomic_get_crtc_state(struct drm_atomic_state *state,
+			    struct intel_crtc *crtc)
+{
+	struct drm_crtc_state *crtc_state;
+	crtc_state = drm_atomic_get_crtc_state(state, &crtc->base);
+	if (IS_ERR(crtc_state))
+		return ERR_CAST(crtc_state);
+
+	return to_intel_crtc_state(crtc_state);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.h b/drivers/gpu/drm/i915/display/intel_atomic.h
new file mode 100644
index 000000000000..1c8507da1a69
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_atomic.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_ATOMIC_H__
+#define __INTEL_ATOMIC_H__
+
+#include <linux/types.h>
+
+struct drm_atomic_state;
+struct drm_connector;
+struct drm_connector_state;
+struct drm_crtc;
+struct drm_crtc_state;
+struct drm_device;
+struct drm_i915_private;
+struct drm_property;
+struct intel_crtc;
+struct intel_crtc_state;
+
+int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
+						const struct drm_connector_state *state,
+						struct drm_property *property,
+						u64 *val);
+int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
+						struct drm_connector_state *state,
+						struct drm_property *property,
+						u64 val);
+int intel_digital_connector_atomic_check(struct drm_connector *conn,
+					 struct drm_connector_state *new_state);
+struct drm_connector_state *
+intel_digital_connector_duplicate_state(struct drm_connector *connector);
+
+struct drm_crtc_state *intel_crtc_duplicate_state(struct drm_crtc *crtc);
+void intel_crtc_destroy_state(struct drm_crtc *crtc,
+			       struct drm_crtc_state *state);
+struct drm_atomic_state *intel_atomic_state_alloc(struct drm_device *dev);
+void intel_atomic_state_clear(struct drm_atomic_state *state);
+
+struct intel_crtc_state *
+intel_atomic_get_crtc_state(struct drm_atomic_state *state,
+			    struct intel_crtc *crtc);
+
+int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
+			       struct intel_crtc *intel_crtc,
+			       struct intel_crtc_state *crtc_state);
+
+#endif /* __INTEL_ATOMIC_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
new file mode 100644
index 000000000000..30bd4e76fff9
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -0,0 +1,355 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * DOC: atomic plane helpers
+ *
+ * The functions here are used by the atomic plane helper functions to
+ * implement legacy plane updates (i.e., drm_plane->update_plane() and
+ * drm_plane->disable_plane()).  This allows plane updates to use the
+ * atomic state infrastructure and perform plane updates as separate
+ * prepare/check/commit/cleanup steps.
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_plane_helper.h>
+
+#include "intel_atomic_plane.h"
+#include "intel_drv.h"
+#include "intel_pm.h"
+#include "intel_sprite.h"
+
+struct intel_plane *intel_plane_alloc(void)
+{
+	struct intel_plane_state *plane_state;
+	struct intel_plane *plane;
+
+	plane = kzalloc(sizeof(*plane), GFP_KERNEL);
+	if (!plane)
+		return ERR_PTR(-ENOMEM);
+
+	plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
+	if (!plane_state) {
+		kfree(plane);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	__drm_atomic_helper_plane_reset(&plane->base, &plane_state->base);
+	plane_state->scaler_id = -1;
+
+	return plane;
+}
+
+void intel_plane_free(struct intel_plane *plane)
+{
+	intel_plane_destroy_state(&plane->base, plane->base.state);
+	kfree(plane);
+}
+
+/**
+ * intel_plane_duplicate_state - duplicate plane state
+ * @plane: drm plane
+ *
+ * Allocates and returns a copy of the plane state (both common and
+ * Intel-specific) for the specified plane.
+ *
+ * Returns: The newly allocated plane state, or NULL on failure.
+ */
+struct drm_plane_state *
+intel_plane_duplicate_state(struct drm_plane *plane)
+{
+	struct drm_plane_state *state;
+	struct intel_plane_state *intel_state;
+
+	intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
+
+	if (!intel_state)
+		return NULL;
+
+	state = &intel_state->base;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, state);
+
+	intel_state->vma = NULL;
+	intel_state->flags = 0;
+
+	return state;
+}
+
+/**
+ * intel_plane_destroy_state - destroy plane state
+ * @plane: drm plane
+ * @state: state object to destroy
+ *
+ * Destroys the plane state (both common and Intel-specific) for the
+ * specified plane.
+ */
+void
+intel_plane_destroy_state(struct drm_plane *plane,
+			  struct drm_plane_state *state)
+{
+	WARN_ON(to_intel_plane_state(state)->vma);
+
+	drm_atomic_helper_plane_destroy_state(plane, state);
+}
+
+unsigned int intel_plane_data_rate(const struct intel_crtc_state *crtc_state,
+				   const struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int cpp;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	cpp = fb->format->cpp[0];
+
+	/*
+	 * Based on HSD#:1408715493
+	 * NV12 cpp == 4, P010 cpp == 8
+	 *
+	 * FIXME what is the logic behind this?
+	 */
+	if (fb->format->is_yuv && fb->format->num_planes > 1)
+		cpp *= 4;
+
+	return cpp * crtc_state->pixel_rate;
+}
+
+int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
+					struct intel_crtc_state *new_crtc_state,
+					const struct intel_plane_state *old_plane_state,
+					struct intel_plane_state *new_plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(new_plane_state->base.plane);
+	int ret;
+
+	new_crtc_state->active_planes &= ~BIT(plane->id);
+	new_crtc_state->nv12_planes &= ~BIT(plane->id);
+	new_crtc_state->c8_planes &= ~BIT(plane->id);
+	new_crtc_state->data_rate[plane->id] = 0;
+	new_plane_state->base.visible = false;
+
+	if (!new_plane_state->base.crtc && !old_plane_state->base.crtc)
+		return 0;
+
+	ret = plane->check_plane(new_crtc_state, new_plane_state);
+	if (ret)
+		return ret;
+
+	/* FIXME pre-g4x don't work like this */
+	if (new_plane_state->base.visible)
+		new_crtc_state->active_planes |= BIT(plane->id);
+
+	if (new_plane_state->base.visible &&
+	    is_planar_yuv_format(new_plane_state->base.fb->format->format))
+		new_crtc_state->nv12_planes |= BIT(plane->id);
+
+	if (new_plane_state->base.visible &&
+	    new_plane_state->base.fb->format->format == DRM_FORMAT_C8)
+		new_crtc_state->c8_planes |= BIT(plane->id);
+
+	if (new_plane_state->base.visible || old_plane_state->base.visible)
+		new_crtc_state->update_planes |= BIT(plane->id);
+
+	new_crtc_state->data_rate[plane->id] =
+		intel_plane_data_rate(new_crtc_state, new_plane_state);
+
+	return intel_plane_atomic_calc_changes(old_crtc_state,
+					       &new_crtc_state->base,
+					       old_plane_state,
+					       &new_plane_state->base);
+}
+
+static int intel_plane_atomic_check(struct drm_plane *plane,
+				    struct drm_plane_state *new_plane_state)
+{
+	struct drm_atomic_state *state = new_plane_state->state;
+	const struct drm_plane_state *old_plane_state =
+		drm_atomic_get_old_plane_state(state, plane);
+	struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
+	const struct drm_crtc_state *old_crtc_state;
+	struct drm_crtc_state *new_crtc_state;
+
+	new_plane_state->visible = false;
+	if (!crtc)
+		return 0;
+
+	old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
+	new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
+						   to_intel_crtc_state(new_crtc_state),
+						   to_intel_plane_state(old_plane_state),
+						   to_intel_plane_state(new_plane_state));
+}
+
+static struct intel_plane *
+skl_next_plane_to_commit(struct intel_atomic_state *state,
+			 struct intel_crtc *crtc,
+			 struct skl_ddb_entry entries_y[I915_MAX_PLANES],
+			 struct skl_ddb_entry entries_uv[I915_MAX_PLANES],
+			 unsigned int *update_mask)
+{
+	struct intel_crtc_state *crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	struct intel_plane_state *plane_state;
+	struct intel_plane *plane;
+	int i;
+
+	if (*update_mask == 0)
+		return NULL;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		enum plane_id plane_id = plane->id;
+
+		if (crtc->pipe != plane->pipe ||
+		    !(*update_mask & BIT(plane_id)))
+			continue;
+
+		if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_y[plane_id],
+						entries_y,
+						I915_MAX_PLANES, plane_id) ||
+		    skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_uv[plane_id],
+						entries_uv,
+						I915_MAX_PLANES, plane_id))
+			continue;
+
+		*update_mask &= ~BIT(plane_id);
+		entries_y[plane_id] = crtc_state->wm.skl.plane_ddb_y[plane_id];
+		entries_uv[plane_id] = crtc_state->wm.skl.plane_ddb_uv[plane_id];
+
+		return plane;
+	}
+
+	/* should never happen */
+	WARN_ON(1);
+
+	return NULL;
+}
+
+void intel_update_plane(struct intel_plane *plane,
+			const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	trace_intel_update_plane(&plane->base, crtc);
+	plane->update_plane(plane, crtc_state, plane_state);
+}
+
+void intel_update_slave(struct intel_plane *plane,
+			const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	trace_intel_update_plane(&plane->base, crtc);
+	plane->update_slave(plane, crtc_state, plane_state);
+}
+
+void intel_disable_plane(struct intel_plane *plane,
+			 const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	trace_intel_disable_plane(&plane->base, crtc);
+	plane->disable_plane(plane, crtc_state);
+}
+
+void skl_update_planes_on_crtc(struct intel_atomic_state *state,
+			       struct intel_crtc *crtc)
+{
+	struct intel_crtc_state *old_crtc_state =
+		intel_atomic_get_old_crtc_state(state, crtc);
+	struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	struct skl_ddb_entry entries_y[I915_MAX_PLANES];
+	struct skl_ddb_entry entries_uv[I915_MAX_PLANES];
+	u32 update_mask = new_crtc_state->update_planes;
+	struct intel_plane *plane;
+
+	memcpy(entries_y, old_crtc_state->wm.skl.plane_ddb_y,
+	       sizeof(old_crtc_state->wm.skl.plane_ddb_y));
+	memcpy(entries_uv, old_crtc_state->wm.skl.plane_ddb_uv,
+	       sizeof(old_crtc_state->wm.skl.plane_ddb_uv));
+
+	while ((plane = skl_next_plane_to_commit(state, crtc,
+						 entries_y, entries_uv,
+						 &update_mask))) {
+		struct intel_plane_state *new_plane_state =
+			intel_atomic_get_new_plane_state(state, plane);
+
+		if (new_plane_state->base.visible) {
+			intel_update_plane(plane, new_crtc_state, new_plane_state);
+		} else if (new_plane_state->slave) {
+			struct intel_plane *master =
+				new_plane_state->linked_plane;
+
+			/*
+			 * We update the slave plane from this function because
+			 * programming it from the master plane's update_plane
+			 * callback runs into issues when the Y plane is
+			 * reassigned, disabled or used by a different plane.
+			 *
+			 * The slave plane is updated with the master plane's
+			 * plane_state.
+			 */
+			new_plane_state =
+				intel_atomic_get_new_plane_state(state, master);
+
+			intel_update_slave(plane, new_crtc_state, new_plane_state);
+		} else {
+			intel_disable_plane(plane, new_crtc_state);
+		}
+	}
+}
+
+void i9xx_update_planes_on_crtc(struct intel_atomic_state *state,
+				struct intel_crtc *crtc)
+{
+	struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	u32 update_mask = new_crtc_state->update_planes;
+	struct intel_plane_state *new_plane_state;
+	struct intel_plane *plane;
+	int i;
+
+	for_each_new_intel_plane_in_state(state, plane, new_plane_state, i) {
+		if (crtc->pipe != plane->pipe ||
+		    !(update_mask & BIT(plane->id)))
+			continue;
+
+		if (new_plane_state->base.visible)
+			intel_update_plane(plane, new_crtc_state, new_plane_state);
+		else
+			intel_disable_plane(plane, new_crtc_state);
+	}
+}
+
+const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
+	.prepare_fb = intel_prepare_plane_fb,
+	.cleanup_fb = intel_cleanup_plane_fb,
+	.atomic_check = intel_plane_atomic_check,
+};
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.h b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
new file mode 100644
index 000000000000..1437a8797e10
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_ATOMIC_PLANE_H__
+#define __INTEL_ATOMIC_PLANE_H__
+
+#include <linux/types.h>
+
+struct drm_crtc_state;
+struct drm_plane;
+struct drm_property;
+struct intel_atomic_state;
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_plane;
+struct intel_plane_state;
+
+extern const struct drm_plane_helper_funcs intel_plane_helper_funcs;
+
+unsigned int intel_plane_data_rate(const struct intel_crtc_state *crtc_state,
+				   const struct intel_plane_state *plane_state);
+void intel_update_plane(struct intel_plane *plane,
+			const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state);
+void intel_update_slave(struct intel_plane *plane,
+			const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state);
+void intel_disable_plane(struct intel_plane *plane,
+			 const struct intel_crtc_state *crtc_state);
+struct intel_plane *intel_plane_alloc(void);
+void intel_plane_free(struct intel_plane *plane);
+struct drm_plane_state *intel_plane_duplicate_state(struct drm_plane *plane);
+void intel_plane_destroy_state(struct drm_plane *plane,
+			       struct drm_plane_state *state);
+void skl_update_planes_on_crtc(struct intel_atomic_state *state,
+			       struct intel_crtc *crtc);
+void i9xx_update_planes_on_crtc(struct intel_atomic_state *state,
+				struct intel_crtc *crtc);
+int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
+					struct intel_crtc_state *crtc_state,
+					const struct intel_plane_state *old_plane_state,
+					struct intel_plane_state *intel_state);
+int intel_plane_atomic_calc_changes(const struct intel_crtc_state *old_crtc_state,
+				    struct drm_crtc_state *crtc_state,
+				    const struct intel_plane_state *old_plane_state,
+				    struct drm_plane_state *plane_state);
+
+#endif /* __INTEL_ATOMIC_PLANE_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
new file mode 100644
index 000000000000..840daff12246
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_audio.c
@@ -0,0 +1,1104 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/component.h>
+#include <linux/kernel.h>
+
+#include <drm/drm_edid.h>
+#include <drm/i915_component.h>
+
+#include "i915_drv.h"
+#include "intel_audio.h"
+#include "intel_drv.h"
+#include "intel_lpe_audio.h"
+
+/**
+ * DOC: High Definition Audio over HDMI and Display Port
+ *
+ * The graphics and audio drivers together support High Definition Audio over
+ * HDMI and Display Port. The audio programming sequences are divided into audio
+ * codec and controller enable and disable sequences. The graphics driver
+ * handles the audio codec sequences, while the audio driver handles the audio
+ * controller sequences.
+ *
+ * The disable sequences must be performed before disabling the transcoder or
+ * port. The enable sequences may only be performed after enabling the
+ * transcoder and port, and after completed link training. Therefore the audio
+ * enable/disable sequences are part of the modeset sequence.
+ *
+ * The codec and controller sequences could be done either parallel or serial,
+ * but generally the ELDV/PD change in the codec sequence indicates to the audio
+ * driver that the controller sequence should start. Indeed, most of the
+ * co-operation between the graphics and audio drivers is handled via audio
+ * related registers. (The notable exception is the power management, not
+ * covered here.)
+ *
+ * The struct &i915_audio_component is used to interact between the graphics
+ * and audio drivers. The struct &i915_audio_component_ops @ops in it is
+ * defined in graphics driver and called in audio driver. The
+ * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
+ */
+
+/* DP N/M table */
+#define LC_810M	810000
+#define LC_540M	540000
+#define LC_270M	270000
+#define LC_162M	162000
+
+struct dp_aud_n_m {
+	int sample_rate;
+	int clock;
+	u16 m;
+	u16 n;
+};
+
+/* Values according to DP 1.4 Table 2-104 */
+static const struct dp_aud_n_m dp_aud_n_m[] = {
+	{ 32000, LC_162M, 1024, 10125 },
+	{ 44100, LC_162M, 784, 5625 },
+	{ 48000, LC_162M, 512, 3375 },
+	{ 64000, LC_162M, 2048, 10125 },
+	{ 88200, LC_162M, 1568, 5625 },
+	{ 96000, LC_162M, 1024, 3375 },
+	{ 128000, LC_162M, 4096, 10125 },
+	{ 176400, LC_162M, 3136, 5625 },
+	{ 192000, LC_162M, 2048, 3375 },
+	{ 32000, LC_270M, 1024, 16875 },
+	{ 44100, LC_270M, 784, 9375 },
+	{ 48000, LC_270M, 512, 5625 },
+	{ 64000, LC_270M, 2048, 16875 },
+	{ 88200, LC_270M, 1568, 9375 },
+	{ 96000, LC_270M, 1024, 5625 },
+	{ 128000, LC_270M, 4096, 16875 },
+	{ 176400, LC_270M, 3136, 9375 },
+	{ 192000, LC_270M, 2048, 5625 },
+	{ 32000, LC_540M, 1024, 33750 },
+	{ 44100, LC_540M, 784, 18750 },
+	{ 48000, LC_540M, 512, 11250 },
+	{ 64000, LC_540M, 2048, 33750 },
+	{ 88200, LC_540M, 1568, 18750 },
+	{ 96000, LC_540M, 1024, 11250 },
+	{ 128000, LC_540M, 4096, 33750 },
+	{ 176400, LC_540M, 3136, 18750 },
+	{ 192000, LC_540M, 2048, 11250 },
+	{ 32000, LC_810M, 1024, 50625 },
+	{ 44100, LC_810M, 784, 28125 },
+	{ 48000, LC_810M, 512, 16875 },
+	{ 64000, LC_810M, 2048, 50625 },
+	{ 88200, LC_810M, 1568, 28125 },
+	{ 96000, LC_810M, 1024, 16875 },
+	{ 128000, LC_810M, 4096, 50625 },
+	{ 176400, LC_810M, 3136, 28125 },
+	{ 192000, LC_810M, 2048, 16875 },
+};
+
+static const struct dp_aud_n_m *
+audio_config_dp_get_n_m(const struct intel_crtc_state *crtc_state, int rate)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dp_aud_n_m); i++) {
+		if (rate == dp_aud_n_m[i].sample_rate &&
+		    crtc_state->port_clock == dp_aud_n_m[i].clock)
+			return &dp_aud_n_m[i];
+	}
+
+	return NULL;
+}
+
+static const struct {
+	int clock;
+	u32 config;
+} hdmi_audio_clock[] = {
+	{ 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
+	{ 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
+	{ 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
+	{ 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
+	{ 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
+	{ 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
+	{ 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
+	{ 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
+	{ 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
+	{ 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
+};
+
+/* HDMI N/CTS table */
+#define TMDS_297M 297000
+#define TMDS_296M 296703
+#define TMDS_594M 594000
+#define TMDS_593M 593407
+
+static const struct {
+	int sample_rate;
+	int clock;
+	int n;
+	int cts;
+} hdmi_aud_ncts[] = {
+	{ 32000, TMDS_296M, 5824, 421875 },
+	{ 32000, TMDS_297M, 3072, 222750 },
+	{ 32000, TMDS_593M, 5824, 843750 },
+	{ 32000, TMDS_594M, 3072, 445500 },
+	{ 44100, TMDS_296M, 4459, 234375 },
+	{ 44100, TMDS_297M, 4704, 247500 },
+	{ 44100, TMDS_593M, 8918, 937500 },
+	{ 44100, TMDS_594M, 9408, 990000 },
+	{ 88200, TMDS_296M, 8918, 234375 },
+	{ 88200, TMDS_297M, 9408, 247500 },
+	{ 88200, TMDS_593M, 17836, 937500 },
+	{ 88200, TMDS_594M, 18816, 990000 },
+	{ 176400, TMDS_296M, 17836, 234375 },
+	{ 176400, TMDS_297M, 18816, 247500 },
+	{ 176400, TMDS_593M, 35672, 937500 },
+	{ 176400, TMDS_594M, 37632, 990000 },
+	{ 48000, TMDS_296M, 5824, 281250 },
+	{ 48000, TMDS_297M, 5120, 247500 },
+	{ 48000, TMDS_593M, 5824, 562500 },
+	{ 48000, TMDS_594M, 6144, 594000 },
+	{ 96000, TMDS_296M, 11648, 281250 },
+	{ 96000, TMDS_297M, 10240, 247500 },
+	{ 96000, TMDS_593M, 11648, 562500 },
+	{ 96000, TMDS_594M, 12288, 594000 },
+	{ 192000, TMDS_296M, 23296, 281250 },
+	{ 192000, TMDS_297M, 20480, 247500 },
+	{ 192000, TMDS_593M, 23296, 562500 },
+	{ 192000, TMDS_594M, 24576, 594000 },
+};
+
+/* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
+static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_state)
+{
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
+		if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(hdmi_audio_clock)) {
+		DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
+			      adjusted_mode->crtc_clock);
+		i = 1;
+	}
+
+	DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n",
+		      hdmi_audio_clock[i].clock,
+		      hdmi_audio_clock[i].config);
+
+	return hdmi_audio_clock[i].config;
+}
+
+static int audio_config_hdmi_get_n(const struct intel_crtc_state *crtc_state,
+				   int rate)
+{
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(hdmi_aud_ncts); i++) {
+		if (rate == hdmi_aud_ncts[i].sample_rate &&
+		    adjusted_mode->crtc_clock == hdmi_aud_ncts[i].clock) {
+			return hdmi_aud_ncts[i].n;
+		}
+	}
+	return 0;
+}
+
+static bool intel_eld_uptodate(struct drm_connector *connector,
+			       i915_reg_t reg_eldv, u32 bits_eldv,
+			       i915_reg_t reg_elda, u32 bits_elda,
+			       i915_reg_t reg_edid)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->dev);
+	const u8 *eld = connector->eld;
+	u32 tmp;
+	int i;
+
+	tmp = I915_READ(reg_eldv);
+	tmp &= bits_eldv;
+
+	if (!tmp)
+		return false;
+
+	tmp = I915_READ(reg_elda);
+	tmp &= ~bits_elda;
+	I915_WRITE(reg_elda, tmp);
+
+	for (i = 0; i < drm_eld_size(eld) / 4; i++)
+		if (I915_READ(reg_edid) != *((const u32 *)eld + i))
+			return false;
+
+	return true;
+}
+
+static void g4x_audio_codec_disable(struct intel_encoder *encoder,
+				    const struct intel_crtc_state *old_crtc_state,
+				    const struct drm_connector_state *old_conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	u32 eldv, tmp;
+
+	DRM_DEBUG_KMS("Disable audio codec\n");
+
+	tmp = I915_READ(G4X_AUD_VID_DID);
+	if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
+		eldv = G4X_ELDV_DEVCL_DEVBLC;
+	else
+		eldv = G4X_ELDV_DEVCTG;
+
+	/* Invalidate ELD */
+	tmp = I915_READ(G4X_AUD_CNTL_ST);
+	tmp &= ~eldv;
+	I915_WRITE(G4X_AUD_CNTL_ST, tmp);
+}
+
+static void g4x_audio_codec_enable(struct intel_encoder *encoder,
+				   const struct intel_crtc_state *crtc_state,
+				   const struct drm_connector_state *conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct drm_connector *connector = conn_state->connector;
+	const u8 *eld = connector->eld;
+	u32 eldv;
+	u32 tmp;
+	int len, i;
+
+	DRM_DEBUG_KMS("Enable audio codec, %u bytes ELD\n", drm_eld_size(eld));
+
+	tmp = I915_READ(G4X_AUD_VID_DID);
+	if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
+		eldv = G4X_ELDV_DEVCL_DEVBLC;
+	else
+		eldv = G4X_ELDV_DEVCTG;
+
+	if (intel_eld_uptodate(connector,
+			       G4X_AUD_CNTL_ST, eldv,
+			       G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK,
+			       G4X_HDMIW_HDMIEDID))
+		return;
+
+	tmp = I915_READ(G4X_AUD_CNTL_ST);
+	tmp &= ~(eldv | G4X_ELD_ADDR_MASK);
+	len = (tmp >> 9) & 0x1f;		/* ELD buffer size */
+	I915_WRITE(G4X_AUD_CNTL_ST, tmp);
+
+	len = min(drm_eld_size(eld) / 4, len);
+	DRM_DEBUG_DRIVER("ELD size %d\n", len);
+	for (i = 0; i < len; i++)
+		I915_WRITE(G4X_HDMIW_HDMIEDID, *((const u32 *)eld + i));
+
+	tmp = I915_READ(G4X_AUD_CNTL_ST);
+	tmp |= eldv;
+	I915_WRITE(G4X_AUD_CNTL_ST, tmp);
+}
+
+static void
+hsw_dp_audio_config_update(struct intel_encoder *encoder,
+			   const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct i915_audio_component *acomp = dev_priv->audio_component;
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	enum port port = encoder->port;
+	const struct dp_aud_n_m *nm;
+	int rate;
+	u32 tmp;
+
+	rate = acomp ? acomp->aud_sample_rate[port] : 0;
+	nm = audio_config_dp_get_n_m(crtc_state, rate);
+	if (nm)
+		DRM_DEBUG_KMS("using Maud %u, Naud %u\n", nm->m, nm->n);
+	else
+		DRM_DEBUG_KMS("using automatic Maud, Naud\n");
+
+	tmp = I915_READ(HSW_AUD_CFG(cpu_transcoder));
+	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
+	tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
+	tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
+	tmp |= AUD_CONFIG_N_VALUE_INDEX;
+
+	if (nm) {
+		tmp &= ~AUD_CONFIG_N_MASK;
+		tmp |= AUD_CONFIG_N(nm->n);
+		tmp |= AUD_CONFIG_N_PROG_ENABLE;
+	}
+
+	I915_WRITE(HSW_AUD_CFG(cpu_transcoder), tmp);
+
+	tmp = I915_READ(HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
+	tmp &= ~AUD_CONFIG_M_MASK;
+	tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
+	tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
+
+	if (nm) {
+		tmp |= nm->m;
+		tmp |= AUD_M_CTS_M_VALUE_INDEX;
+		tmp |= AUD_M_CTS_M_PROG_ENABLE;
+	}
+
+	I915_WRITE(HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
+}
+
+static void
+hsw_hdmi_audio_config_update(struct intel_encoder *encoder,
+			     const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct i915_audio_component *acomp = dev_priv->audio_component;
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	enum port port = encoder->port;
+	int n, rate;
+	u32 tmp;
+
+	rate = acomp ? acomp->aud_sample_rate[port] : 0;
+
+	tmp = I915_READ(HSW_AUD_CFG(cpu_transcoder));
+	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
+	tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
+	tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
+	tmp |= audio_config_hdmi_pixel_clock(crtc_state);
+
+	n = audio_config_hdmi_get_n(crtc_state, rate);
+	if (n != 0) {
+		DRM_DEBUG_KMS("using N %d\n", n);
+
+		tmp &= ~AUD_CONFIG_N_MASK;
+		tmp |= AUD_CONFIG_N(n);
+		tmp |= AUD_CONFIG_N_PROG_ENABLE;
+	} else {
+		DRM_DEBUG_KMS("using automatic N\n");
+	}
+
+	I915_WRITE(HSW_AUD_CFG(cpu_transcoder), tmp);
+
+	/*
+	 * Let's disable "Enable CTS or M Prog bit"
+	 * and let HW calculate the value
+	 */
+	tmp = I915_READ(HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
+	tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
+	tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
+	I915_WRITE(HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
+}
+
+static void
+hsw_audio_config_update(struct intel_encoder *encoder,
+			const struct intel_crtc_state *crtc_state)
+{
+	if (intel_crtc_has_dp_encoder(crtc_state))
+		hsw_dp_audio_config_update(encoder, crtc_state);
+	else
+		hsw_hdmi_audio_config_update(encoder, crtc_state);
+}
+
+static void hsw_audio_codec_disable(struct intel_encoder *encoder,
+				    const struct intel_crtc_state *old_crtc_state,
+				    const struct drm_connector_state *old_conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
+	u32 tmp;
+
+	DRM_DEBUG_KMS("Disable audio codec on transcoder %s\n",
+		      transcoder_name(cpu_transcoder));
+
+	mutex_lock(&dev_priv->av_mutex);
+
+	/* Disable timestamps */
+	tmp = I915_READ(HSW_AUD_CFG(cpu_transcoder));
+	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
+	tmp |= AUD_CONFIG_N_PROG_ENABLE;
+	tmp &= ~AUD_CONFIG_UPPER_N_MASK;
+	tmp &= ~AUD_CONFIG_LOWER_N_MASK;
+	if (intel_crtc_has_dp_encoder(old_crtc_state))
+		tmp |= AUD_CONFIG_N_VALUE_INDEX;
+	I915_WRITE(HSW_AUD_CFG(cpu_transcoder), tmp);
+
+	/* Invalidate ELD */
+	tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
+	tmp &= ~AUDIO_ELD_VALID(cpu_transcoder);
+	tmp &= ~AUDIO_OUTPUT_ENABLE(cpu_transcoder);
+	I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
+
+	mutex_unlock(&dev_priv->av_mutex);
+}
+
+static void hsw_audio_codec_enable(struct intel_encoder *encoder,
+				   const struct intel_crtc_state *crtc_state,
+				   const struct drm_connector_state *conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct drm_connector *connector = conn_state->connector;
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	const u8 *eld = connector->eld;
+	u32 tmp;
+	int len, i;
+
+	DRM_DEBUG_KMS("Enable audio codec on transcoder %s, %u bytes ELD\n",
+		      transcoder_name(cpu_transcoder), drm_eld_size(eld));
+
+	mutex_lock(&dev_priv->av_mutex);
+
+	/* Enable audio presence detect, invalidate ELD */
+	tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
+	tmp |= AUDIO_OUTPUT_ENABLE(cpu_transcoder);
+	tmp &= ~AUDIO_ELD_VALID(cpu_transcoder);
+	I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
+
+	/*
+	 * FIXME: We're supposed to wait for vblank here, but we have vblanks
+	 * disabled during the mode set. The proper fix would be to push the
+	 * rest of the setup into a vblank work item, queued here, but the
+	 * infrastructure is not there yet.
+	 */
+
+	/* Reset ELD write address */
+	tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(cpu_transcoder));
+	tmp &= ~IBX_ELD_ADDRESS_MASK;
+	I915_WRITE(HSW_AUD_DIP_ELD_CTRL(cpu_transcoder), tmp);
+
+	/* Up to 84 bytes of hw ELD buffer */
+	len = min(drm_eld_size(eld), 84);
+	for (i = 0; i < len / 4; i++)
+		I915_WRITE(HSW_AUD_EDID_DATA(cpu_transcoder), *((const u32 *)eld + i));
+
+	/* ELD valid */
+	tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
+	tmp |= AUDIO_ELD_VALID(cpu_transcoder);
+	I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
+
+	/* Enable timestamps */
+	hsw_audio_config_update(encoder, crtc_state);
+
+	mutex_unlock(&dev_priv->av_mutex);
+}
+
+static void ilk_audio_codec_disable(struct intel_encoder *encoder,
+				    const struct intel_crtc_state *old_crtc_state,
+				    const struct drm_connector_state *old_conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	enum pipe pipe = crtc->pipe;
+	enum port port = encoder->port;
+	u32 tmp, eldv;
+	i915_reg_t aud_config, aud_cntrl_st2;
+
+	DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n",
+		      port_name(port), pipe_name(pipe));
+
+	if (WARN_ON(port == PORT_A))
+		return;
+
+	if (HAS_PCH_IBX(dev_priv)) {
+		aud_config = IBX_AUD_CFG(pipe);
+		aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
+	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		aud_config = VLV_AUD_CFG(pipe);
+		aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
+	} else {
+		aud_config = CPT_AUD_CFG(pipe);
+		aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
+	}
+
+	/* Disable timestamps */
+	tmp = I915_READ(aud_config);
+	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
+	tmp |= AUD_CONFIG_N_PROG_ENABLE;
+	tmp &= ~AUD_CONFIG_UPPER_N_MASK;
+	tmp &= ~AUD_CONFIG_LOWER_N_MASK;
+	if (intel_crtc_has_dp_encoder(old_crtc_state))
+		tmp |= AUD_CONFIG_N_VALUE_INDEX;
+	I915_WRITE(aud_config, tmp);
+
+	eldv = IBX_ELD_VALID(port);
+
+	/* Invalidate ELD */
+	tmp = I915_READ(aud_cntrl_st2);
+	tmp &= ~eldv;
+	I915_WRITE(aud_cntrl_st2, tmp);
+}
+
+static void ilk_audio_codec_enable(struct intel_encoder *encoder,
+				   const struct intel_crtc_state *crtc_state,
+				   const struct drm_connector_state *conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_connector *connector = conn_state->connector;
+	enum pipe pipe = crtc->pipe;
+	enum port port = encoder->port;
+	const u8 *eld = connector->eld;
+	u32 tmp, eldv;
+	int len, i;
+	i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
+
+	DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n",
+		      port_name(port), pipe_name(pipe), drm_eld_size(eld));
+
+	if (WARN_ON(port == PORT_A))
+		return;
+
+	/*
+	 * FIXME: We're supposed to wait for vblank here, but we have vblanks
+	 * disabled during the mode set. The proper fix would be to push the
+	 * rest of the setup into a vblank work item, queued here, but the
+	 * infrastructure is not there yet.
+	 */
+
+	if (HAS_PCH_IBX(dev_priv)) {
+		hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
+		aud_config = IBX_AUD_CFG(pipe);
+		aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
+		aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
+	} else if (IS_VALLEYVIEW(dev_priv) ||
+		   IS_CHERRYVIEW(dev_priv)) {
+		hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
+		aud_config = VLV_AUD_CFG(pipe);
+		aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
+		aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
+	} else {
+		hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
+		aud_config = CPT_AUD_CFG(pipe);
+		aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
+		aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
+	}
+
+	eldv = IBX_ELD_VALID(port);
+
+	/* Invalidate ELD */
+	tmp = I915_READ(aud_cntrl_st2);
+	tmp &= ~eldv;
+	I915_WRITE(aud_cntrl_st2, tmp);
+
+	/* Reset ELD write address */
+	tmp = I915_READ(aud_cntl_st);
+	tmp &= ~IBX_ELD_ADDRESS_MASK;
+	I915_WRITE(aud_cntl_st, tmp);
+
+	/* Up to 84 bytes of hw ELD buffer */
+	len = min(drm_eld_size(eld), 84);
+	for (i = 0; i < len / 4; i++)
+		I915_WRITE(hdmiw_hdmiedid, *((const u32 *)eld + i));
+
+	/* ELD valid */
+	tmp = I915_READ(aud_cntrl_st2);
+	tmp |= eldv;
+	I915_WRITE(aud_cntrl_st2, tmp);
+
+	/* Enable timestamps */
+	tmp = I915_READ(aud_config);
+	tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
+	tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
+	tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
+	if (intel_crtc_has_dp_encoder(crtc_state))
+		tmp |= AUD_CONFIG_N_VALUE_INDEX;
+	else
+		tmp |= audio_config_hdmi_pixel_clock(crtc_state);
+	I915_WRITE(aud_config, tmp);
+}
+
+/**
+ * intel_audio_codec_enable - Enable the audio codec for HD audio
+ * @encoder: encoder on which to enable audio
+ * @crtc_state: pointer to the current crtc state.
+ * @conn_state: pointer to the current connector state.
+ *
+ * The enable sequences may only be performed after enabling the transcoder and
+ * port, and after completed link training.
+ */
+void intel_audio_codec_enable(struct intel_encoder *encoder,
+			      const struct intel_crtc_state *crtc_state,
+			      const struct drm_connector_state *conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct i915_audio_component *acomp = dev_priv->audio_component;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_connector *connector = conn_state->connector;
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+	enum port port = encoder->port;
+	enum pipe pipe = crtc->pipe;
+
+	/* FIXME precompute the ELD in .compute_config() */
+	if (!connector->eld[0])
+		DRM_DEBUG_KMS("Bogus ELD on [CONNECTOR:%d:%s]\n",
+			      connector->base.id, connector->name);
+
+	DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
+			 connector->base.id,
+			 connector->name,
+			 connector->encoder->base.id,
+			 connector->encoder->name);
+
+	connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
+
+	if (dev_priv->display.audio_codec_enable)
+		dev_priv->display.audio_codec_enable(encoder,
+						     crtc_state,
+						     conn_state);
+
+	mutex_lock(&dev_priv->av_mutex);
+	encoder->audio_connector = connector;
+
+	/* referred in audio callbacks */
+	dev_priv->av_enc_map[pipe] = encoder;
+	mutex_unlock(&dev_priv->av_mutex);
+
+	if (acomp && acomp->base.audio_ops &&
+	    acomp->base.audio_ops->pin_eld_notify) {
+		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
+		if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST))
+			pipe = -1;
+		acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
+						 (int) port, (int) pipe);
+	}
+
+	intel_lpe_audio_notify(dev_priv, pipe, port, connector->eld,
+			       crtc_state->port_clock,
+			       intel_crtc_has_dp_encoder(crtc_state));
+}
+
+/**
+ * intel_audio_codec_disable - Disable the audio codec for HD audio
+ * @encoder: encoder on which to disable audio
+ * @old_crtc_state: pointer to the old crtc state.
+ * @old_conn_state: pointer to the old connector state.
+ *
+ * The disable sequences must be performed before disabling the transcoder or
+ * port.
+ */
+void intel_audio_codec_disable(struct intel_encoder *encoder,
+			       const struct intel_crtc_state *old_crtc_state,
+			       const struct drm_connector_state *old_conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct i915_audio_component *acomp = dev_priv->audio_component;
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	enum port port = encoder->port;
+	enum pipe pipe = crtc->pipe;
+
+	if (dev_priv->display.audio_codec_disable)
+		dev_priv->display.audio_codec_disable(encoder,
+						      old_crtc_state,
+						      old_conn_state);
+
+	mutex_lock(&dev_priv->av_mutex);
+	encoder->audio_connector = NULL;
+	dev_priv->av_enc_map[pipe] = NULL;
+	mutex_unlock(&dev_priv->av_mutex);
+
+	if (acomp && acomp->base.audio_ops &&
+	    acomp->base.audio_ops->pin_eld_notify) {
+		/* audio drivers expect pipe = -1 to indicate Non-MST cases */
+		if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
+			pipe = -1;
+		acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
+						 (int) port, (int) pipe);
+	}
+
+	intel_lpe_audio_notify(dev_priv, pipe, port, NULL, 0, false);
+}
+
+/**
+ * intel_init_audio_hooks - Set up chip specific audio hooks
+ * @dev_priv: device private
+ */
+void intel_init_audio_hooks(struct drm_i915_private *dev_priv)
+{
+	if (IS_G4X(dev_priv)) {
+		dev_priv->display.audio_codec_enable = g4x_audio_codec_enable;
+		dev_priv->display.audio_codec_disable = g4x_audio_codec_disable;
+	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
+		dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
+	} else if (IS_HASWELL(dev_priv) || INTEL_GEN(dev_priv) >= 8) {
+		dev_priv->display.audio_codec_enable = hsw_audio_codec_enable;
+		dev_priv->display.audio_codec_disable = hsw_audio_codec_disable;
+	} else if (HAS_PCH_SPLIT(dev_priv)) {
+		dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
+		dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
+	}
+}
+
+static void glk_force_audio_cdclk(struct drm_i915_private *dev_priv,
+				  bool enable)
+{
+	struct drm_modeset_acquire_ctx ctx;
+	struct drm_atomic_state *state;
+	int ret;
+
+	drm_modeset_acquire_init(&ctx, 0);
+	state = drm_atomic_state_alloc(&dev_priv->drm);
+	if (WARN_ON(!state))
+		return;
+
+	state->acquire_ctx = &ctx;
+
+retry:
+	to_intel_atomic_state(state)->cdclk.force_min_cdclk_changed = true;
+	to_intel_atomic_state(state)->cdclk.force_min_cdclk =
+		enable ? 2 * 96000 : 0;
+
+	/*
+	 * Protects dev_priv->cdclk.force_min_cdclk
+	 * Need to lock this here in case we have no active pipes
+	 * and thus wouldn't lock it during the commit otherwise.
+	 */
+	ret = drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex,
+			       &ctx);
+	if (!ret)
+		ret = drm_atomic_commit(state);
+
+	if (ret == -EDEADLK) {
+		drm_atomic_state_clear(state);
+		drm_modeset_backoff(&ctx);
+		goto retry;
+	}
+
+	WARN_ON(ret);
+
+	drm_atomic_state_put(state);
+
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+}
+
+static unsigned long i915_audio_component_get_power(struct device *kdev)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+	intel_wakeref_t ret;
+
+	/* Catch potential impedance mismatches before they occur! */
+	BUILD_BUG_ON(sizeof(intel_wakeref_t) > sizeof(unsigned long));
+
+	ret = intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
+
+	/* Force CDCLK to 2*BCLK as long as we need audio to be powered. */
+	if (dev_priv->audio_power_refcount++ == 0)
+		if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+			glk_force_audio_cdclk(dev_priv, true);
+
+	return ret;
+}
+
+static void i915_audio_component_put_power(struct device *kdev,
+					   unsigned long cookie)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+
+	/* Stop forcing CDCLK to 2*BCLK if no need for audio to be powered. */
+	if (--dev_priv->audio_power_refcount == 0)
+		if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+			glk_force_audio_cdclk(dev_priv, false);
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO, cookie);
+}
+
+static void i915_audio_component_codec_wake_override(struct device *kdev,
+						     bool enable)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+	unsigned long cookie;
+	u32 tmp;
+
+	if (!IS_GEN(dev_priv, 9))
+		return;
+
+	cookie = i915_audio_component_get_power(kdev);
+
+	/*
+	 * Enable/disable generating the codec wake signal, overriding the
+	 * internal logic to generate the codec wake to controller.
+	 */
+	tmp = I915_READ(HSW_AUD_CHICKENBIT);
+	tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL;
+	I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
+	usleep_range(1000, 1500);
+
+	if (enable) {
+		tmp = I915_READ(HSW_AUD_CHICKENBIT);
+		tmp |= SKL_AUD_CODEC_WAKE_SIGNAL;
+		I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
+		usleep_range(1000, 1500);
+	}
+
+	i915_audio_component_put_power(kdev, cookie);
+}
+
+/* Get CDCLK in kHz  */
+static int i915_audio_component_get_cdclk_freq(struct device *kdev)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+
+	if (WARN_ON_ONCE(!HAS_DDI(dev_priv)))
+		return -ENODEV;
+
+	return dev_priv->cdclk.hw.cdclk;
+}
+
+/*
+ * get the intel_encoder according to the parameter port and pipe
+ * intel_encoder is saved by the index of pipe
+ * MST & (pipe >= 0): return the av_enc_map[pipe],
+ *   when port is matched
+ * MST & (pipe < 0): this is invalid
+ * Non-MST & (pipe >= 0): only pipe = 0 (the first device entry)
+ *   will get the right intel_encoder with port matched
+ * Non-MST & (pipe < 0): get the right intel_encoder with port matched
+ */
+static struct intel_encoder *get_saved_enc(struct drm_i915_private *dev_priv,
+					       int port, int pipe)
+{
+	struct intel_encoder *encoder;
+
+	/* MST */
+	if (pipe >= 0) {
+		if (WARN_ON(pipe >= ARRAY_SIZE(dev_priv->av_enc_map)))
+			return NULL;
+
+		encoder = dev_priv->av_enc_map[pipe];
+		/*
+		 * when bootup, audio driver may not know it is
+		 * MST or not. So it will poll all the port & pipe
+		 * combinations
+		 */
+		if (encoder != NULL && encoder->port == port &&
+		    encoder->type == INTEL_OUTPUT_DP_MST)
+			return encoder;
+	}
+
+	/* Non-MST */
+	if (pipe > 0)
+		return NULL;
+
+	for_each_pipe(dev_priv, pipe) {
+		encoder = dev_priv->av_enc_map[pipe];
+		if (encoder == NULL)
+			continue;
+
+		if (encoder->type == INTEL_OUTPUT_DP_MST)
+			continue;
+
+		if (port == encoder->port)
+			return encoder;
+	}
+
+	return NULL;
+}
+
+static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
+						int pipe, int rate)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+	struct i915_audio_component *acomp = dev_priv->audio_component;
+	struct intel_encoder *encoder;
+	struct intel_crtc *crtc;
+	unsigned long cookie;
+	int err = 0;
+
+	if (!HAS_DDI(dev_priv))
+		return 0;
+
+	cookie = i915_audio_component_get_power(kdev);
+	mutex_lock(&dev_priv->av_mutex);
+
+	/* 1. get the pipe */
+	encoder = get_saved_enc(dev_priv, port, pipe);
+	if (!encoder || !encoder->base.crtc) {
+		DRM_DEBUG_KMS("Not valid for port %c\n", port_name(port));
+		err = -ENODEV;
+		goto unlock;
+	}
+
+	crtc = to_intel_crtc(encoder->base.crtc);
+
+	/* port must be valid now, otherwise the pipe will be invalid */
+	acomp->aud_sample_rate[port] = rate;
+
+	hsw_audio_config_update(encoder, crtc->config);
+
+ unlock:
+	mutex_unlock(&dev_priv->av_mutex);
+	i915_audio_component_put_power(kdev, cookie);
+	return err;
+}
+
+static int i915_audio_component_get_eld(struct device *kdev, int port,
+					int pipe, bool *enabled,
+					unsigned char *buf, int max_bytes)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+	struct intel_encoder *intel_encoder;
+	const u8 *eld;
+	int ret = -EINVAL;
+
+	mutex_lock(&dev_priv->av_mutex);
+
+	intel_encoder = get_saved_enc(dev_priv, port, pipe);
+	if (!intel_encoder) {
+		DRM_DEBUG_KMS("Not valid for port %c\n", port_name(port));
+		mutex_unlock(&dev_priv->av_mutex);
+		return ret;
+	}
+
+	ret = 0;
+	*enabled = intel_encoder->audio_connector != NULL;
+	if (*enabled) {
+		eld = intel_encoder->audio_connector->eld;
+		ret = drm_eld_size(eld);
+		memcpy(buf, eld, min(max_bytes, ret));
+	}
+
+	mutex_unlock(&dev_priv->av_mutex);
+	return ret;
+}
+
+static const struct drm_audio_component_ops i915_audio_component_ops = {
+	.owner		= THIS_MODULE,
+	.get_power	= i915_audio_component_get_power,
+	.put_power	= i915_audio_component_put_power,
+	.codec_wake_override = i915_audio_component_codec_wake_override,
+	.get_cdclk_freq	= i915_audio_component_get_cdclk_freq,
+	.sync_audio_rate = i915_audio_component_sync_audio_rate,
+	.get_eld	= i915_audio_component_get_eld,
+};
+
+static int i915_audio_component_bind(struct device *i915_kdev,
+				     struct device *hda_kdev, void *data)
+{
+	struct i915_audio_component *acomp = data;
+	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+	int i;
+
+	if (WARN_ON(acomp->base.ops || acomp->base.dev))
+		return -EEXIST;
+
+	if (WARN_ON(!device_link_add(hda_kdev, i915_kdev, DL_FLAG_STATELESS)))
+		return -ENOMEM;
+
+	drm_modeset_lock_all(&dev_priv->drm);
+	acomp->base.ops = &i915_audio_component_ops;
+	acomp->base.dev = i915_kdev;
+	BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
+	for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
+		acomp->aud_sample_rate[i] = 0;
+	dev_priv->audio_component = acomp;
+	drm_modeset_unlock_all(&dev_priv->drm);
+
+	return 0;
+}
+
+static void i915_audio_component_unbind(struct device *i915_kdev,
+					struct device *hda_kdev, void *data)
+{
+	struct i915_audio_component *acomp = data;
+	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+
+	drm_modeset_lock_all(&dev_priv->drm);
+	acomp->base.ops = NULL;
+	acomp->base.dev = NULL;
+	dev_priv->audio_component = NULL;
+	drm_modeset_unlock_all(&dev_priv->drm);
+
+	device_link_remove(hda_kdev, i915_kdev);
+}
+
+static const struct component_ops i915_audio_component_bind_ops = {
+	.bind	= i915_audio_component_bind,
+	.unbind	= i915_audio_component_unbind,
+};
+
+/**
+ * i915_audio_component_init - initialize and register the audio component
+ * @dev_priv: i915 device instance
+ *
+ * This will register with the component framework a child component which
+ * will bind dynamically to the snd_hda_intel driver's corresponding master
+ * component when the latter is registered. During binding the child
+ * initializes an instance of struct i915_audio_component which it receives
+ * from the master. The master can then start to use the interface defined by
+ * this struct. Each side can break the binding at any point by deregistering
+ * its own component after which each side's component unbind callback is
+ * called.
+ *
+ * We ignore any error during registration and continue with reduced
+ * functionality (i.e. without HDMI audio).
+ */
+static void i915_audio_component_init(struct drm_i915_private *dev_priv)
+{
+	int ret;
+
+	ret = component_add_typed(dev_priv->drm.dev,
+				  &i915_audio_component_bind_ops,
+				  I915_COMPONENT_AUDIO);
+	if (ret < 0) {
+		DRM_ERROR("failed to add audio component (%d)\n", ret);
+		/* continue with reduced functionality */
+		return;
+	}
+
+	dev_priv->audio_component_registered = true;
+}
+
+/**
+ * i915_audio_component_cleanup - deregister the audio component
+ * @dev_priv: i915 device instance
+ *
+ * Deregisters the audio component, breaking any existing binding to the
+ * corresponding snd_hda_intel driver's master component.
+ */
+static void i915_audio_component_cleanup(struct drm_i915_private *dev_priv)
+{
+	if (!dev_priv->audio_component_registered)
+		return;
+
+	component_del(dev_priv->drm.dev, &i915_audio_component_bind_ops);
+	dev_priv->audio_component_registered = false;
+}
+
+/**
+ * intel_audio_init() - Initialize the audio driver either using
+ * component framework or using lpe audio bridge
+ * @dev_priv: the i915 drm device private data
+ *
+ */
+void intel_audio_init(struct drm_i915_private *dev_priv)
+{
+	if (intel_lpe_audio_init(dev_priv) < 0)
+		i915_audio_component_init(dev_priv);
+}
+
+/**
+ * intel_audio_deinit() - deinitialize the audio driver
+ * @dev_priv: the i915 drm device private data
+ *
+ */
+void intel_audio_deinit(struct drm_i915_private *dev_priv)
+{
+	if ((dev_priv)->lpe_audio.platdev != NULL)
+		intel_lpe_audio_teardown(dev_priv);
+	else
+		i915_audio_component_cleanup(dev_priv);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_audio.h b/drivers/gpu/drm/i915/display/intel_audio.h
new file mode 100644
index 000000000000..a3657c7a7ba2
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_audio.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_AUDIO_H__
+#define __INTEL_AUDIO_H__
+
+struct drm_connector_state;
+struct drm_i915_private;
+struct intel_crtc_state;
+struct intel_encoder;
+
+void intel_init_audio_hooks(struct drm_i915_private *dev_priv);
+void intel_audio_codec_enable(struct intel_encoder *encoder,
+			      const struct intel_crtc_state *crtc_state,
+			      const struct drm_connector_state *conn_state);
+void intel_audio_codec_disable(struct intel_encoder *encoder,
+			       const struct intel_crtc_state *old_crtc_state,
+			       const struct drm_connector_state *old_conn_state);
+void intel_audio_init(struct drm_i915_private *dev_priv);
+void intel_audio_deinit(struct drm_i915_private *dev_priv);
+
+#endif /* __INTEL_AUDIO_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
new file mode 100644
index 000000000000..270719fabbc5
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -0,0 +1,2253 @@
+/*
+ * Copyright © 2006 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include <drm/drm_dp_helper.h>
+#include <drm/i915_drm.h>
+
+#include "display/intel_gmbus.h"
+
+#include "i915_drv.h"
+
+#define _INTEL_BIOS_PRIVATE
+#include "intel_vbt_defs.h"
+
+/**
+ * DOC: Video BIOS Table (VBT)
+ *
+ * The Video BIOS Table, or VBT, provides platform and board specific
+ * configuration information to the driver that is not discoverable or available
+ * through other means. The configuration is mostly related to display
+ * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
+ * the PCI ROM.
+ *
+ * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
+ * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
+ * contain the actual configuration information. The VBT Header, and thus the
+ * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
+ * BDB Header. The data blocks are concatenated after the BDB Header. The data
+ * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
+ * data. (Block 53, the MIPI Sequence Block is an exception.)
+ *
+ * The driver parses the VBT during load. The relevant information is stored in
+ * driver private data for ease of use, and the actual VBT is not read after
+ * that.
+ */
+
+#define	SLAVE_ADDR1	0x70
+#define	SLAVE_ADDR2	0x72
+
+/* Get BDB block size given a pointer to Block ID. */
+static u32 _get_blocksize(const u8 *block_base)
+{
+	/* The MIPI Sequence Block v3+ has a separate size field. */
+	if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
+		return *((const u32 *)(block_base + 4));
+	else
+		return *((const u16 *)(block_base + 1));
+}
+
+/* Get BDB block size give a pointer to data after Block ID and Block Size. */
+static u32 get_blocksize(const void *block_data)
+{
+	return _get_blocksize(block_data - 3);
+}
+
+static const void *
+find_section(const void *_bdb, enum bdb_block_id section_id)
+{
+	const struct bdb_header *bdb = _bdb;
+	const u8 *base = _bdb;
+	int index = 0;
+	u32 total, current_size;
+	enum bdb_block_id current_id;
+
+	/* skip to first section */
+	index += bdb->header_size;
+	total = bdb->bdb_size;
+
+	/* walk the sections looking for section_id */
+	while (index + 3 < total) {
+		current_id = *(base + index);
+		current_size = _get_blocksize(base + index);
+		index += 3;
+
+		if (index + current_size > total)
+			return NULL;
+
+		if (current_id == section_id)
+			return base + index;
+
+		index += current_size;
+	}
+
+	return NULL;
+}
+
+static void
+fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
+			const struct lvds_dvo_timing *dvo_timing)
+{
+	panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
+		dvo_timing->hactive_lo;
+	panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
+		((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
+	panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
+		((dvo_timing->hsync_pulse_width_hi << 8) |
+			dvo_timing->hsync_pulse_width_lo);
+	panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
+		((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
+
+	panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
+		dvo_timing->vactive_lo;
+	panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
+		((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
+	panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
+		((dvo_timing->vsync_pulse_width_hi << 4) |
+			dvo_timing->vsync_pulse_width_lo);
+	panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
+		((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
+	panel_fixed_mode->clock = dvo_timing->clock * 10;
+	panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
+
+	if (dvo_timing->hsync_positive)
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
+	else
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
+
+	if (dvo_timing->vsync_positive)
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
+	else
+		panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
+
+	panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
+		dvo_timing->himage_lo;
+	panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
+		dvo_timing->vimage_lo;
+
+	/* Some VBTs have bogus h/vtotal values */
+	if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
+		panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
+	if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
+		panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
+
+	drm_mode_set_name(panel_fixed_mode);
+}
+
+static const struct lvds_dvo_timing *
+get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
+		    const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
+		    int index)
+{
+	/*
+	 * the size of fp_timing varies on the different platform.
+	 * So calculate the DVO timing relative offset in LVDS data
+	 * entry to get the DVO timing entry
+	 */
+
+	int lfp_data_size =
+		lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
+		lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
+	int dvo_timing_offset =
+		lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
+		lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
+	char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
+
+	return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
+}
+
+/* get lvds_fp_timing entry
+ * this function may return NULL if the corresponding entry is invalid
+ */
+static const struct lvds_fp_timing *
+get_lvds_fp_timing(const struct bdb_header *bdb,
+		   const struct bdb_lvds_lfp_data *data,
+		   const struct bdb_lvds_lfp_data_ptrs *ptrs,
+		   int index)
+{
+	size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
+	u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
+	size_t ofs;
+
+	if (index >= ARRAY_SIZE(ptrs->ptr))
+		return NULL;
+	ofs = ptrs->ptr[index].fp_timing_offset;
+	if (ofs < data_ofs ||
+	    ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
+		return NULL;
+	return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
+}
+
+/* Try to find integrated panel data */
+static void
+parse_lfp_panel_data(struct drm_i915_private *dev_priv,
+		     const struct bdb_header *bdb)
+{
+	const struct bdb_lvds_options *lvds_options;
+	const struct bdb_lvds_lfp_data *lvds_lfp_data;
+	const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
+	const struct lvds_dvo_timing *panel_dvo_timing;
+	const struct lvds_fp_timing *fp_timing;
+	struct drm_display_mode *panel_fixed_mode;
+	int panel_type;
+	int drrs_mode;
+	int ret;
+
+	lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
+	if (!lvds_options)
+		return;
+
+	dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
+
+	ret = intel_opregion_get_panel_type(dev_priv);
+	if (ret >= 0) {
+		WARN_ON(ret > 0xf);
+		panel_type = ret;
+		DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
+	} else {
+		if (lvds_options->panel_type > 0xf) {
+			DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
+				      lvds_options->panel_type);
+			return;
+		}
+		panel_type = lvds_options->panel_type;
+		DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
+	}
+
+	dev_priv->vbt.panel_type = panel_type;
+
+	drrs_mode = (lvds_options->dps_panel_type_bits
+				>> (panel_type * 2)) & MODE_MASK;
+	/*
+	 * VBT has static DRRS = 0 and seamless DRRS = 2.
+	 * The below piece of code is required to adjust vbt.drrs_type
+	 * to match the enum drrs_support_type.
+	 */
+	switch (drrs_mode) {
+	case 0:
+		dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
+		DRM_DEBUG_KMS("DRRS supported mode is static\n");
+		break;
+	case 2:
+		dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
+		DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
+		break;
+	default:
+		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
+		DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
+		break;
+	}
+
+	lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
+	if (!lvds_lfp_data)
+		return;
+
+	lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
+	if (!lvds_lfp_data_ptrs)
+		return;
+
+	panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
+					       lvds_lfp_data_ptrs,
+					       panel_type);
+
+	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
+	if (!panel_fixed_mode)
+		return;
+
+	fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
+
+	dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
+
+	DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
+	drm_mode_debug_printmodeline(panel_fixed_mode);
+
+	fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
+				       lvds_lfp_data_ptrs,
+				       panel_type);
+	if (fp_timing) {
+		/* check the resolution, just to be sure */
+		if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
+		    fp_timing->y_res == panel_fixed_mode->vdisplay) {
+			dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
+			DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
+				      dev_priv->vbt.bios_lvds_val);
+		}
+	}
+}
+
+static void
+parse_lfp_backlight(struct drm_i915_private *dev_priv,
+		    const struct bdb_header *bdb)
+{
+	const struct bdb_lfp_backlight_data *backlight_data;
+	const struct lfp_backlight_data_entry *entry;
+	int panel_type = dev_priv->vbt.panel_type;
+
+	backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
+	if (!backlight_data)
+		return;
+
+	if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
+		DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
+			      backlight_data->entry_size);
+		return;
+	}
+
+	entry = &backlight_data->data[panel_type];
+
+	dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
+	if (!dev_priv->vbt.backlight.present) {
+		DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
+			      entry->type);
+		return;
+	}
+
+	dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
+	if (bdb->version >= 191 &&
+	    get_blocksize(backlight_data) >= sizeof(*backlight_data)) {
+		const struct lfp_backlight_control_method *method;
+
+		method = &backlight_data->backlight_control[panel_type];
+		dev_priv->vbt.backlight.type = method->type;
+		dev_priv->vbt.backlight.controller = method->controller;
+	}
+
+	dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
+	dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
+	dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
+	DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
+		      "active %s, min brightness %u, level %u, controller %u\n",
+		      dev_priv->vbt.backlight.pwm_freq_hz,
+		      dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
+		      dev_priv->vbt.backlight.min_brightness,
+		      backlight_data->level[panel_type],
+		      dev_priv->vbt.backlight.controller);
+}
+
+/* Try to find sdvo panel data */
+static void
+parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
+		      const struct bdb_header *bdb)
+{
+	const struct bdb_sdvo_panel_dtds *dtds;
+	struct drm_display_mode *panel_fixed_mode;
+	int index;
+
+	index = i915_modparams.vbt_sdvo_panel_type;
+	if (index == -2) {
+		DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
+		return;
+	}
+
+	if (index == -1) {
+		const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
+
+		sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
+		if (!sdvo_lvds_options)
+			return;
+
+		index = sdvo_lvds_options->panel_type;
+	}
+
+	dtds = find_section(bdb, BDB_SDVO_PANEL_DTDS);
+	if (!dtds)
+		return;
+
+	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
+	if (!panel_fixed_mode)
+		return;
+
+	fill_detail_timing_data(panel_fixed_mode, &dtds->dtds[index]);
+
+	dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
+
+	DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
+	drm_mode_debug_printmodeline(panel_fixed_mode);
+}
+
+static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
+				    bool alternate)
+{
+	switch (INTEL_GEN(dev_priv)) {
+	case 2:
+		return alternate ? 66667 : 48000;
+	case 3:
+	case 4:
+		return alternate ? 100000 : 96000;
+	default:
+		return alternate ? 100000 : 120000;
+	}
+}
+
+static void
+parse_general_features(struct drm_i915_private *dev_priv,
+		       const struct bdb_header *bdb)
+{
+	const struct bdb_general_features *general;
+
+	general = find_section(bdb, BDB_GENERAL_FEATURES);
+	if (!general)
+		return;
+
+	dev_priv->vbt.int_tv_support = general->int_tv_support;
+	/* int_crt_support can't be trusted on earlier platforms */
+	if (bdb->version >= 155 &&
+	    (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
+		dev_priv->vbt.int_crt_support = general->int_crt_support;
+	dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
+	dev_priv->vbt.lvds_ssc_freq =
+		intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
+	dev_priv->vbt.display_clock_mode = general->display_clock_mode;
+	dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
+	if (bdb->version >= 181) {
+		dev_priv->vbt.orientation = general->rotate_180 ?
+			DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
+			DRM_MODE_PANEL_ORIENTATION_NORMAL;
+	} else {
+		dev_priv->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
+	}
+	DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
+		      dev_priv->vbt.int_tv_support,
+		      dev_priv->vbt.int_crt_support,
+		      dev_priv->vbt.lvds_use_ssc,
+		      dev_priv->vbt.lvds_ssc_freq,
+		      dev_priv->vbt.display_clock_mode,
+		      dev_priv->vbt.fdi_rx_polarity_inverted);
+}
+
+static const struct child_device_config *
+child_device_ptr(const struct bdb_general_definitions *defs, int i)
+{
+	return (const void *) &defs->devices[i * defs->child_dev_size];
+}
+
+static void
+parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, u8 bdb_version)
+{
+	struct sdvo_device_mapping *mapping;
+	const struct child_device_config *child;
+	int i, count = 0;
+
+	/*
+	 * Only parse SDVO mappings on gens that could have SDVO. This isn't
+	 * accurate and doesn't have to be, as long as it's not too strict.
+	 */
+	if (!IS_GEN_RANGE(dev_priv, 3, 7)) {
+		DRM_DEBUG_KMS("Skipping SDVO device mapping\n");
+		return;
+	}
+
+	for (i = 0, count = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		if (child->slave_addr != SLAVE_ADDR1 &&
+		    child->slave_addr != SLAVE_ADDR2) {
+			/*
+			 * If the slave address is neither 0x70 nor 0x72,
+			 * it is not a SDVO device. Skip it.
+			 */
+			continue;
+		}
+		if (child->dvo_port != DEVICE_PORT_DVOB &&
+		    child->dvo_port != DEVICE_PORT_DVOC) {
+			/* skip the incorrect SDVO port */
+			DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
+			continue;
+		}
+		DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
+			      " %s port\n",
+			      child->slave_addr,
+			      (child->dvo_port == DEVICE_PORT_DVOB) ?
+			      "SDVOB" : "SDVOC");
+		mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
+		if (!mapping->initialized) {
+			mapping->dvo_port = child->dvo_port;
+			mapping->slave_addr = child->slave_addr;
+			mapping->dvo_wiring = child->dvo_wiring;
+			mapping->ddc_pin = child->ddc_pin;
+			mapping->i2c_pin = child->i2c_pin;
+			mapping->initialized = 1;
+			DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
+				      mapping->dvo_port,
+				      mapping->slave_addr,
+				      mapping->dvo_wiring,
+				      mapping->ddc_pin,
+				      mapping->i2c_pin);
+		} else {
+			DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
+					 "two SDVO device.\n");
+		}
+		if (child->slave2_addr) {
+			/* Maybe this is a SDVO device with multiple inputs */
+			/* And the mapping info is not added */
+			DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
+				" is a SDVO device with multiple inputs.\n");
+		}
+		count++;
+	}
+
+	if (!count) {
+		/* No SDVO device info is found */
+		DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
+	}
+}
+
+static void
+parse_driver_features(struct drm_i915_private *dev_priv,
+		      const struct bdb_header *bdb)
+{
+	const struct bdb_driver_features *driver;
+
+	driver = find_section(bdb, BDB_DRIVER_FEATURES);
+	if (!driver)
+		return;
+
+	if (INTEL_GEN(dev_priv) >= 5) {
+		/*
+		 * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS
+		 * to mean "eDP". The VBT spec doesn't agree with that
+		 * interpretation, but real world VBTs seem to.
+		 */
+		if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS)
+			dev_priv->vbt.int_lvds_support = 0;
+	} else {
+		/*
+		 * FIXME it's not clear which BDB version has the LVDS config
+		 * bits defined. Revision history in the VBT spec says:
+		 * "0.92 | Add two definitions for VBT value of LVDS Active
+		 *  Config (00b and 11b values defined) | 06/13/2005"
+		 * but does not the specify the BDB version.
+		 *
+		 * So far version 134 (on i945gm) is the oldest VBT observed
+		 * in the wild with the bits correctly populated. Version
+		 * 108 (on i85x) does not have the bits correctly populated.
+		 */
+		if (bdb->version >= 134 &&
+		    driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
+		    driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
+			dev_priv->vbt.int_lvds_support = 0;
+	}
+
+	DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
+	/*
+	 * If DRRS is not supported, drrs_type has to be set to 0.
+	 * This is because, VBT is configured in such a way that
+	 * static DRRS is 0 and DRRS not supported is represented by
+	 * driver->drrs_enabled=false
+	 */
+	if (!driver->drrs_enabled)
+		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
+	dev_priv->vbt.psr.enable = driver->psr_enabled;
+}
+
+static void
+parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
+{
+	const struct bdb_edp *edp;
+	const struct edp_power_seq *edp_pps;
+	const struct edp_fast_link_params *edp_link_params;
+	int panel_type = dev_priv->vbt.panel_type;
+
+	edp = find_section(bdb, BDB_EDP);
+	if (!edp)
+		return;
+
+	switch ((edp->color_depth >> (panel_type * 2)) & 3) {
+	case EDP_18BPP:
+		dev_priv->vbt.edp.bpp = 18;
+		break;
+	case EDP_24BPP:
+		dev_priv->vbt.edp.bpp = 24;
+		break;
+	case EDP_30BPP:
+		dev_priv->vbt.edp.bpp = 30;
+		break;
+	}
+
+	/* Get the eDP sequencing and link info */
+	edp_pps = &edp->power_seqs[panel_type];
+	edp_link_params = &edp->fast_link_params[panel_type];
+
+	dev_priv->vbt.edp.pps = *edp_pps;
+
+	switch (edp_link_params->rate) {
+	case EDP_RATE_1_62:
+		dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
+		break;
+	case EDP_RATE_2_7:
+		dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
+		break;
+	default:
+		DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
+			      edp_link_params->rate);
+		break;
+	}
+
+	switch (edp_link_params->lanes) {
+	case EDP_LANE_1:
+		dev_priv->vbt.edp.lanes = 1;
+		break;
+	case EDP_LANE_2:
+		dev_priv->vbt.edp.lanes = 2;
+		break;
+	case EDP_LANE_4:
+		dev_priv->vbt.edp.lanes = 4;
+		break;
+	default:
+		DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
+			      edp_link_params->lanes);
+		break;
+	}
+
+	switch (edp_link_params->preemphasis) {
+	case EDP_PREEMPHASIS_NONE:
+		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
+		break;
+	case EDP_PREEMPHASIS_3_5dB:
+		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
+		break;
+	case EDP_PREEMPHASIS_6dB:
+		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
+		break;
+	case EDP_PREEMPHASIS_9_5dB:
+		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
+		break;
+	default:
+		DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
+			      edp_link_params->preemphasis);
+		break;
+	}
+
+	switch (edp_link_params->vswing) {
+	case EDP_VSWING_0_4V:
+		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
+		break;
+	case EDP_VSWING_0_6V:
+		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
+		break;
+	case EDP_VSWING_0_8V:
+		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
+		break;
+	case EDP_VSWING_1_2V:
+		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
+		break;
+	default:
+		DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
+			      edp_link_params->vswing);
+		break;
+	}
+
+	if (bdb->version >= 173) {
+		u8 vswing;
+
+		/* Don't read from VBT if module parameter has valid value*/
+		if (i915_modparams.edp_vswing) {
+			dev_priv->vbt.edp.low_vswing =
+				i915_modparams.edp_vswing == 1;
+		} else {
+			vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
+			dev_priv->vbt.edp.low_vswing = vswing == 0;
+		}
+	}
+}
+
+static void
+parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
+{
+	const struct bdb_psr *psr;
+	const struct psr_table *psr_table;
+	int panel_type = dev_priv->vbt.panel_type;
+
+	psr = find_section(bdb, BDB_PSR);
+	if (!psr) {
+		DRM_DEBUG_KMS("No PSR BDB found.\n");
+		return;
+	}
+
+	psr_table = &psr->psr_table[panel_type];
+
+	dev_priv->vbt.psr.full_link = psr_table->full_link;
+	dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
+
+	/* Allowed VBT values goes from 0 to 15 */
+	dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
+		psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
+
+	switch (psr_table->lines_to_wait) {
+	case 0:
+		dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
+		break;
+	case 1:
+		dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
+		break;
+	case 2:
+		dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
+		break;
+	case 3:
+		dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
+		break;
+	default:
+		DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
+			      psr_table->lines_to_wait);
+		break;
+	}
+
+	/*
+	 * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
+	 * Old decimal value is wake up time in multiples of 100 us.
+	 */
+	if (bdb->version >= 205 &&
+	    (IS_GEN9_BC(dev_priv) || IS_GEMINILAKE(dev_priv) ||
+	     INTEL_GEN(dev_priv) >= 10)) {
+		switch (psr_table->tp1_wakeup_time) {
+		case 0:
+			dev_priv->vbt.psr.tp1_wakeup_time_us = 500;
+			break;
+		case 1:
+			dev_priv->vbt.psr.tp1_wakeup_time_us = 100;
+			break;
+		case 3:
+			dev_priv->vbt.psr.tp1_wakeup_time_us = 0;
+			break;
+		default:
+			DRM_DEBUG_KMS("VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
+					psr_table->tp1_wakeup_time);
+			/* fallthrough */
+		case 2:
+			dev_priv->vbt.psr.tp1_wakeup_time_us = 2500;
+			break;
+		}
+
+		switch (psr_table->tp2_tp3_wakeup_time) {
+		case 0:
+			dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 500;
+			break;
+		case 1:
+			dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 100;
+			break;
+		case 3:
+			dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 0;
+			break;
+		default:
+			DRM_DEBUG_KMS("VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
+					psr_table->tp2_tp3_wakeup_time);
+			/* fallthrough */
+		case 2:
+			dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
+		break;
+		}
+	} else {
+		dev_priv->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100;
+		dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
+	}
+
+	if (bdb->version >= 226) {
+		u32 wakeup_time = psr_table->psr2_tp2_tp3_wakeup_time;
+
+		wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3;
+		switch (wakeup_time) {
+		case 0:
+			wakeup_time = 500;
+			break;
+		case 1:
+			wakeup_time = 100;
+			break;
+		case 3:
+			wakeup_time = 50;
+			break;
+		default:
+		case 2:
+			wakeup_time = 2500;
+			break;
+		}
+		dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us = wakeup_time;
+	} else {
+		/* Reusing PSR1 wakeup time for PSR2 in older VBTs */
+		dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us = dev_priv->vbt.psr.tp2_tp3_wakeup_time_us;
+	}
+}
+
+static void parse_dsi_backlight_ports(struct drm_i915_private *dev_priv,
+				      u16 version, enum port port)
+{
+	if (!dev_priv->vbt.dsi.config->dual_link || version < 197) {
+		dev_priv->vbt.dsi.bl_ports = BIT(port);
+		if (dev_priv->vbt.dsi.config->cabc_supported)
+			dev_priv->vbt.dsi.cabc_ports = BIT(port);
+
+		return;
+	}
+
+	switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) {
+	case DL_DCS_PORT_A:
+		dev_priv->vbt.dsi.bl_ports = BIT(PORT_A);
+		break;
+	case DL_DCS_PORT_C:
+		dev_priv->vbt.dsi.bl_ports = BIT(PORT_C);
+		break;
+	default:
+	case DL_DCS_PORT_A_AND_C:
+		dev_priv->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
+		break;
+	}
+
+	if (!dev_priv->vbt.dsi.config->cabc_supported)
+		return;
+
+	switch (dev_priv->vbt.dsi.config->dl_dcs_cabc_ports) {
+	case DL_DCS_PORT_A:
+		dev_priv->vbt.dsi.cabc_ports = BIT(PORT_A);
+		break;
+	case DL_DCS_PORT_C:
+		dev_priv->vbt.dsi.cabc_ports = BIT(PORT_C);
+		break;
+	default:
+	case DL_DCS_PORT_A_AND_C:
+		dev_priv->vbt.dsi.cabc_ports =
+					BIT(PORT_A) | BIT(PORT_C);
+		break;
+	}
+}
+
+static void
+parse_mipi_config(struct drm_i915_private *dev_priv,
+		  const struct bdb_header *bdb)
+{
+	const struct bdb_mipi_config *start;
+	const struct mipi_config *config;
+	const struct mipi_pps_data *pps;
+	int panel_type = dev_priv->vbt.panel_type;
+	enum port port;
+
+	/* parse MIPI blocks only if LFP type is MIPI */
+	if (!intel_bios_is_dsi_present(dev_priv, &port))
+		return;
+
+	/* Initialize this to undefined indicating no generic MIPI support */
+	dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
+
+	/* Block #40 is already parsed and panel_fixed_mode is
+	 * stored in dev_priv->lfp_lvds_vbt_mode
+	 * resuse this when needed
+	 */
+
+	/* Parse #52 for panel index used from panel_type already
+	 * parsed
+	 */
+	start = find_section(bdb, BDB_MIPI_CONFIG);
+	if (!start) {
+		DRM_DEBUG_KMS("No MIPI config BDB found");
+		return;
+	}
+
+	DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
+								panel_type);
+
+	/*
+	 * get hold of the correct configuration block and pps data as per
+	 * the panel_type as index
+	 */
+	config = &start->config[panel_type];
+	pps = &start->pps[panel_type];
+
+	/* store as of now full data. Trim when we realise all is not needed */
+	dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
+	if (!dev_priv->vbt.dsi.config)
+		return;
+
+	dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
+	if (!dev_priv->vbt.dsi.pps) {
+		kfree(dev_priv->vbt.dsi.config);
+		return;
+	}
+
+	parse_dsi_backlight_ports(dev_priv, bdb->version, port);
+
+	/* FIXME is the 90 vs. 270 correct? */
+	switch (config->rotation) {
+	case ENABLE_ROTATION_0:
+		/*
+		 * Most (all?) VBTs claim 0 degrees despite having
+		 * an upside down panel, thus we do not trust this.
+		 */
+		dev_priv->vbt.dsi.orientation =
+			DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
+		break;
+	case ENABLE_ROTATION_90:
+		dev_priv->vbt.dsi.orientation =
+			DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
+		break;
+	case ENABLE_ROTATION_180:
+		dev_priv->vbt.dsi.orientation =
+			DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
+		break;
+	case ENABLE_ROTATION_270:
+		dev_priv->vbt.dsi.orientation =
+			DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
+		break;
+	}
+
+	/* We have mandatory mipi config blocks. Initialize as generic panel */
+	dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
+}
+
+/* Find the sequence block and size for the given panel. */
+static const u8 *
+find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
+			  u16 panel_id, u32 *seq_size)
+{
+	u32 total = get_blocksize(sequence);
+	const u8 *data = &sequence->data[0];
+	u8 current_id;
+	u32 current_size;
+	int header_size = sequence->version >= 3 ? 5 : 3;
+	int index = 0;
+	int i;
+
+	/* skip new block size */
+	if (sequence->version >= 3)
+		data += 4;
+
+	for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
+		if (index + header_size > total) {
+			DRM_ERROR("Invalid sequence block (header)\n");
+			return NULL;
+		}
+
+		current_id = *(data + index);
+		if (sequence->version >= 3)
+			current_size = *((const u32 *)(data + index + 1));
+		else
+			current_size = *((const u16 *)(data + index + 1));
+
+		index += header_size;
+
+		if (index + current_size > total) {
+			DRM_ERROR("Invalid sequence block\n");
+			return NULL;
+		}
+
+		if (current_id == panel_id) {
+			*seq_size = current_size;
+			return data + index;
+		}
+
+		index += current_size;
+	}
+
+	DRM_ERROR("Sequence block detected but no valid configuration\n");
+
+	return NULL;
+}
+
+static int goto_next_sequence(const u8 *data, int index, int total)
+{
+	u16 len;
+
+	/* Skip Sequence Byte. */
+	for (index = index + 1; index < total; index += len) {
+		u8 operation_byte = *(data + index);
+		index++;
+
+		switch (operation_byte) {
+		case MIPI_SEQ_ELEM_END:
+			return index;
+		case MIPI_SEQ_ELEM_SEND_PKT:
+			if (index + 4 > total)
+				return 0;
+
+			len = *((const u16 *)(data + index + 2)) + 4;
+			break;
+		case MIPI_SEQ_ELEM_DELAY:
+			len = 4;
+			break;
+		case MIPI_SEQ_ELEM_GPIO:
+			len = 2;
+			break;
+		case MIPI_SEQ_ELEM_I2C:
+			if (index + 7 > total)
+				return 0;
+			len = *(data + index + 6) + 7;
+			break;
+		default:
+			DRM_ERROR("Unknown operation byte\n");
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+static int goto_next_sequence_v3(const u8 *data, int index, int total)
+{
+	int seq_end;
+	u16 len;
+	u32 size_of_sequence;
+
+	/*
+	 * Could skip sequence based on Size of Sequence alone, but also do some
+	 * checking on the structure.
+	 */
+	if (total < 5) {
+		DRM_ERROR("Too small sequence size\n");
+		return 0;
+	}
+
+	/* Skip Sequence Byte. */
+	index++;
+
+	/*
+	 * Size of Sequence. Excludes the Sequence Byte and the size itself,
+	 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
+	 * byte.
+	 */
+	size_of_sequence = *((const u32 *)(data + index));
+	index += 4;
+
+	seq_end = index + size_of_sequence;
+	if (seq_end > total) {
+		DRM_ERROR("Invalid sequence size\n");
+		return 0;
+	}
+
+	for (; index < total; index += len) {
+		u8 operation_byte = *(data + index);
+		index++;
+
+		if (operation_byte == MIPI_SEQ_ELEM_END) {
+			if (index != seq_end) {
+				DRM_ERROR("Invalid element structure\n");
+				return 0;
+			}
+			return index;
+		}
+
+		len = *(data + index);
+		index++;
+
+		/*
+		 * FIXME: Would be nice to check elements like for v1/v2 in
+		 * goto_next_sequence() above.
+		 */
+		switch (operation_byte) {
+		case MIPI_SEQ_ELEM_SEND_PKT:
+		case MIPI_SEQ_ELEM_DELAY:
+		case MIPI_SEQ_ELEM_GPIO:
+		case MIPI_SEQ_ELEM_I2C:
+		case MIPI_SEQ_ELEM_SPI:
+		case MIPI_SEQ_ELEM_PMIC:
+			break;
+		default:
+			DRM_ERROR("Unknown operation byte %u\n",
+				  operation_byte);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
+ * skip all delay + gpio operands and stop at the first DSI packet op.
+ */
+static int get_init_otp_deassert_fragment_len(struct drm_i915_private *dev_priv)
+{
+	const u8 *data = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
+	int index, len;
+
+	if (WARN_ON(!data || dev_priv->vbt.dsi.seq_version != 1))
+		return 0;
+
+	/* index = 1 to skip sequence byte */
+	for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
+		switch (data[index]) {
+		case MIPI_SEQ_ELEM_SEND_PKT:
+			return index == 1 ? 0 : index;
+		case MIPI_SEQ_ELEM_DELAY:
+			len = 5; /* 1 byte for operand + uint32 */
+			break;
+		case MIPI_SEQ_ELEM_GPIO:
+			len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
+			break;
+		default:
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
+ * The deassert must be done before calling intel_dsi_device_ready, so for
+ * these devices we split the init OTP sequence into a deassert sequence and
+ * the actual init OTP part.
+ */
+static void fixup_mipi_sequences(struct drm_i915_private *dev_priv)
+{
+	u8 *init_otp;
+	int len;
+
+	/* Limit this to VLV for now. */
+	if (!IS_VALLEYVIEW(dev_priv))
+		return;
+
+	/* Limit this to v1 vid-mode sequences */
+	if (dev_priv->vbt.dsi.config->is_cmd_mode ||
+	    dev_priv->vbt.dsi.seq_version != 1)
+		return;
+
+	/* Only do this if there are otp and assert seqs and no deassert seq */
+	if (!dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
+	    !dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
+	    dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
+		return;
+
+	/* The deassert-sequence ends at the first DSI packet */
+	len = get_init_otp_deassert_fragment_len(dev_priv);
+	if (!len)
+		return;
+
+	DRM_DEBUG_KMS("Using init OTP fragment to deassert reset\n");
+
+	/* Copy the fragment, update seq byte and terminate it */
+	init_otp = (u8 *)dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
+	dev_priv->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
+	if (!dev_priv->vbt.dsi.deassert_seq)
+		return;
+	dev_priv->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
+	dev_priv->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
+	/* Use the copy for deassert */
+	dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
+		dev_priv->vbt.dsi.deassert_seq;
+	/* Replace the last byte of the fragment with init OTP seq byte */
+	init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
+	/* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
+	dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
+}
+
+static void
+parse_mipi_sequence(struct drm_i915_private *dev_priv,
+		    const struct bdb_header *bdb)
+{
+	int panel_type = dev_priv->vbt.panel_type;
+	const struct bdb_mipi_sequence *sequence;
+	const u8 *seq_data;
+	u32 seq_size;
+	u8 *data;
+	int index = 0;
+
+	/* Only our generic panel driver uses the sequence block. */
+	if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
+		return;
+
+	sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
+	if (!sequence) {
+		DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
+		return;
+	}
+
+	/* Fail gracefully for forward incompatible sequence block. */
+	if (sequence->version >= 4) {
+		DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
+			  sequence->version);
+		return;
+	}
+
+	DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
+
+	seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
+	if (!seq_data)
+		return;
+
+	data = kmemdup(seq_data, seq_size, GFP_KERNEL);
+	if (!data)
+		return;
+
+	/* Parse the sequences, store pointers to each sequence. */
+	for (;;) {
+		u8 seq_id = *(data + index);
+		if (seq_id == MIPI_SEQ_END)
+			break;
+
+		if (seq_id >= MIPI_SEQ_MAX) {
+			DRM_ERROR("Unknown sequence %u\n", seq_id);
+			goto err;
+		}
+
+		/* Log about presence of sequences we won't run. */
+		if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
+			DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id);
+
+		dev_priv->vbt.dsi.sequence[seq_id] = data + index;
+
+		if (sequence->version >= 3)
+			index = goto_next_sequence_v3(data, index, seq_size);
+		else
+			index = goto_next_sequence(data, index, seq_size);
+		if (!index) {
+			DRM_ERROR("Invalid sequence %u\n", seq_id);
+			goto err;
+		}
+	}
+
+	dev_priv->vbt.dsi.data = data;
+	dev_priv->vbt.dsi.size = seq_size;
+	dev_priv->vbt.dsi.seq_version = sequence->version;
+
+	fixup_mipi_sequences(dev_priv);
+
+	DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
+	return;
+
+err:
+	kfree(data);
+	memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
+}
+
+static u8 translate_iboost(u8 val)
+{
+	static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
+
+	if (val >= ARRAY_SIZE(mapping)) {
+		DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
+		return 0;
+	}
+	return mapping[val];
+}
+
+static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
+{
+	const struct ddi_vbt_port_info *info;
+	enum port port;
+
+	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
+		info = &i915->vbt.ddi_port_info[port];
+
+		if (info->child && ddc_pin == info->alternate_ddc_pin)
+			return port;
+	}
+
+	return PORT_NONE;
+}
+
+static void sanitize_ddc_pin(struct drm_i915_private *dev_priv,
+			     enum port port)
+{
+	struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
+	enum port p;
+
+	if (!info->alternate_ddc_pin)
+		return;
+
+	p = get_port_by_ddc_pin(dev_priv, info->alternate_ddc_pin);
+	if (p != PORT_NONE) {
+		DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, "
+			      "disabling port %c DVI/HDMI support\n",
+			      port_name(port), info->alternate_ddc_pin,
+			      port_name(p), port_name(port));
+
+		/*
+		 * If we have multiple ports supposedly sharing the
+		 * pin, then dvi/hdmi couldn't exist on the shared
+		 * port. Otherwise they share the same ddc bin and
+		 * system couldn't communicate with them separately.
+		 *
+		 * Give child device order the priority, first come first
+		 * served.
+		 */
+		info->supports_dvi = false;
+		info->supports_hdmi = false;
+		info->alternate_ddc_pin = 0;
+	}
+}
+
+static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
+{
+	const struct ddi_vbt_port_info *info;
+	enum port port;
+
+	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
+		info = &i915->vbt.ddi_port_info[port];
+
+		if (info->child && aux_ch == info->alternate_aux_channel)
+			return port;
+	}
+
+	return PORT_NONE;
+}
+
+static void sanitize_aux_ch(struct drm_i915_private *dev_priv,
+			    enum port port)
+{
+	struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
+	enum port p;
+
+	if (!info->alternate_aux_channel)
+		return;
+
+	p = get_port_by_aux_ch(dev_priv, info->alternate_aux_channel);
+	if (p != PORT_NONE) {
+		DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, "
+			      "disabling port %c DP support\n",
+			      port_name(port), info->alternate_aux_channel,
+			      port_name(p), port_name(port));
+
+		/*
+		 * If we have multiple ports supposedlt sharing the
+		 * aux channel, then DP couldn't exist on the shared
+		 * port. Otherwise they share the same aux channel
+		 * and system couldn't communicate with them separately.
+		 *
+		 * Give child device order the priority, first come first
+		 * served.
+		 */
+		info->supports_dp = false;
+		info->alternate_aux_channel = 0;
+	}
+}
+
+static const u8 cnp_ddc_pin_map[] = {
+	[0] = 0, /* N/A */
+	[DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
+	[DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
+	[DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
+	[DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
+};
+
+static const u8 icp_ddc_pin_map[] = {
+	[ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
+	[ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
+	[ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
+	[ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
+	[ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
+	[ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
+};
+
+static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
+{
+	const u8 *ddc_pin_map;
+	int n_entries;
+
+	if (HAS_PCH_ICP(dev_priv)) {
+		ddc_pin_map = icp_ddc_pin_map;
+		n_entries = ARRAY_SIZE(icp_ddc_pin_map);
+	} else if (HAS_PCH_CNP(dev_priv)) {
+		ddc_pin_map = cnp_ddc_pin_map;
+		n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
+	} else {
+		/* Assuming direct map */
+		return vbt_pin;
+	}
+
+	if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
+		return ddc_pin_map[vbt_pin];
+
+	DRM_DEBUG_KMS("Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
+		      vbt_pin);
+	return 0;
+}
+
+static enum port dvo_port_to_port(u8 dvo_port)
+{
+	/*
+	 * Each DDI port can have more than one value on the "DVO Port" field,
+	 * so look for all the possible values for each port.
+	 */
+	static const int dvo_ports[][3] = {
+		[PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
+		[PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
+		[PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
+		[PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1},
+		[PORT_E] = { DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
+		[PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1},
+	};
+	enum port port;
+	int i;
+
+	for (port = PORT_A; port < ARRAY_SIZE(dvo_ports); port++) {
+		for (i = 0; i < ARRAY_SIZE(dvo_ports[port]); i++) {
+			if (dvo_ports[port][i] == -1)
+				break;
+
+			if (dvo_port == dvo_ports[port][i])
+				return port;
+		}
+	}
+
+	return PORT_NONE;
+}
+
+static void parse_ddi_port(struct drm_i915_private *dev_priv,
+			   const struct child_device_config *child,
+			   u8 bdb_version)
+{
+	struct ddi_vbt_port_info *info;
+	bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
+	enum port port;
+
+	port = dvo_port_to_port(child->dvo_port);
+	if (port == PORT_NONE)
+		return;
+
+	info = &dev_priv->vbt.ddi_port_info[port];
+
+	if (info->child) {
+		DRM_DEBUG_KMS("More than one child device for port %c in VBT, using the first.\n",
+			      port_name(port));
+		return;
+	}
+
+	is_dvi = child->device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
+	is_dp = child->device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
+	is_crt = child->device_type & DEVICE_TYPE_ANALOG_OUTPUT;
+	is_hdmi = is_dvi && (child->device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
+	is_edp = is_dp && (child->device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
+
+	if (port == PORT_A && is_dvi) {
+		DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n",
+			      is_hdmi ? "/HDMI" : "");
+		is_dvi = false;
+		is_hdmi = false;
+	}
+
+	info->supports_dvi = is_dvi;
+	info->supports_hdmi = is_hdmi;
+	info->supports_dp = is_dp;
+	info->supports_edp = is_edp;
+
+	if (bdb_version >= 195)
+		info->supports_typec_usb = child->dp_usb_type_c;
+
+	if (bdb_version >= 209)
+		info->supports_tbt = child->tbt;
+
+	DRM_DEBUG_KMS("Port %c VBT info: CRT:%d DVI:%d HDMI:%d DP:%d eDP:%d LSPCON:%d USB-Type-C:%d TBT:%d\n",
+		      port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp,
+		      HAS_LSPCON(dev_priv) && child->lspcon,
+		      info->supports_typec_usb, info->supports_tbt);
+
+	if (is_edp && is_dvi)
+		DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
+			      port_name(port));
+	if (is_crt && port != PORT_E)
+		DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
+	if (is_crt && (is_dvi || is_dp))
+		DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
+			      port_name(port));
+	if (is_dvi && (port == PORT_A || port == PORT_E))
+		DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
+	if (!is_dvi && !is_dp && !is_crt)
+		DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
+			      port_name(port));
+	if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
+		DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
+
+	if (is_dvi) {
+		u8 ddc_pin;
+
+		ddc_pin = map_ddc_pin(dev_priv, child->ddc_pin);
+		if (intel_gmbus_is_valid_pin(dev_priv, ddc_pin)) {
+			info->alternate_ddc_pin = ddc_pin;
+			sanitize_ddc_pin(dev_priv, port);
+		} else {
+			DRM_DEBUG_KMS("Port %c has invalid DDC pin %d, "
+				      "sticking to defaults\n",
+				      port_name(port), ddc_pin);
+		}
+	}
+
+	if (is_dp) {
+		info->alternate_aux_channel = child->aux_channel;
+
+		sanitize_aux_ch(dev_priv, port);
+	}
+
+	if (bdb_version >= 158) {
+		/* The VBT HDMI level shift values match the table we have. */
+		u8 hdmi_level_shift = child->hdmi_level_shifter_value;
+		DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
+			      port_name(port),
+			      hdmi_level_shift);
+		info->hdmi_level_shift = hdmi_level_shift;
+	}
+
+	if (bdb_version >= 204) {
+		int max_tmds_clock;
+
+		switch (child->hdmi_max_data_rate) {
+		default:
+			MISSING_CASE(child->hdmi_max_data_rate);
+			/* fall through */
+		case HDMI_MAX_DATA_RATE_PLATFORM:
+			max_tmds_clock = 0;
+			break;
+		case HDMI_MAX_DATA_RATE_297:
+			max_tmds_clock = 297000;
+			break;
+		case HDMI_MAX_DATA_RATE_165:
+			max_tmds_clock = 165000;
+			break;
+		}
+
+		if (max_tmds_clock)
+			DRM_DEBUG_KMS("VBT HDMI max TMDS clock for port %c: %d kHz\n",
+				      port_name(port), max_tmds_clock);
+		info->max_tmds_clock = max_tmds_clock;
+	}
+
+	/* Parse the I_boost config for SKL and above */
+	if (bdb_version >= 196 && child->iboost) {
+		info->dp_boost_level = translate_iboost(child->dp_iboost_level);
+		DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
+			      port_name(port), info->dp_boost_level);
+		info->hdmi_boost_level = translate_iboost(child->hdmi_iboost_level);
+		DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
+			      port_name(port), info->hdmi_boost_level);
+	}
+
+	/* DP max link rate for CNL+ */
+	if (bdb_version >= 216) {
+		switch (child->dp_max_link_rate) {
+		default:
+		case VBT_DP_MAX_LINK_RATE_HBR3:
+			info->dp_max_link_rate = 810000;
+			break;
+		case VBT_DP_MAX_LINK_RATE_HBR2:
+			info->dp_max_link_rate = 540000;
+			break;
+		case VBT_DP_MAX_LINK_RATE_HBR:
+			info->dp_max_link_rate = 270000;
+			break;
+		case VBT_DP_MAX_LINK_RATE_LBR:
+			info->dp_max_link_rate = 162000;
+			break;
+		}
+		DRM_DEBUG_KMS("VBT DP max link rate for port %c: %d\n",
+			      port_name(port), info->dp_max_link_rate);
+	}
+
+	info->child = child;
+}
+
+static void parse_ddi_ports(struct drm_i915_private *dev_priv, u8 bdb_version)
+{
+	const struct child_device_config *child;
+	int i;
+
+	if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv))
+		return;
+
+	if (bdb_version < 155)
+		return;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		parse_ddi_port(dev_priv, child, bdb_version);
+	}
+}
+
+static void
+parse_general_definitions(struct drm_i915_private *dev_priv,
+			  const struct bdb_header *bdb)
+{
+	const struct bdb_general_definitions *defs;
+	const struct child_device_config *child;
+	int i, child_device_num, count;
+	u8 expected_size;
+	u16 block_size;
+	int bus_pin;
+
+	defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
+	if (!defs) {
+		DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
+		return;
+	}
+
+	block_size = get_blocksize(defs);
+	if (block_size < sizeof(*defs)) {
+		DRM_DEBUG_KMS("General definitions block too small (%u)\n",
+			      block_size);
+		return;
+	}
+
+	bus_pin = defs->crt_ddc_gmbus_pin;
+	DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
+	if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
+		dev_priv->vbt.crt_ddc_pin = bus_pin;
+
+	if (bdb->version < 106) {
+		expected_size = 22;
+	} else if (bdb->version < 111) {
+		expected_size = 27;
+	} else if (bdb->version < 195) {
+		expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
+	} else if (bdb->version == 195) {
+		expected_size = 37;
+	} else if (bdb->version <= 215) {
+		expected_size = 38;
+	} else if (bdb->version <= 216) {
+		expected_size = 39;
+	} else {
+		expected_size = sizeof(*child);
+		BUILD_BUG_ON(sizeof(*child) < 39);
+		DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
+				 bdb->version, expected_size);
+	}
+
+	/* Flag an error for unexpected size, but continue anyway. */
+	if (defs->child_dev_size != expected_size)
+		DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
+			  defs->child_dev_size, expected_size, bdb->version);
+
+	/* The legacy sized child device config is the minimum we need. */
+	if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
+		DRM_DEBUG_KMS("Child device config size %u is too small.\n",
+			      defs->child_dev_size);
+		return;
+	}
+
+	/* get the number of child device */
+	child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
+	count = 0;
+	/* get the number of child device that is present */
+	for (i = 0; i < child_device_num; i++) {
+		child = child_device_ptr(defs, i);
+		if (!child->device_type)
+			continue;
+		count++;
+	}
+	if (!count) {
+		DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
+		return;
+	}
+	dev_priv->vbt.child_dev = kcalloc(count, sizeof(*child), GFP_KERNEL);
+	if (!dev_priv->vbt.child_dev) {
+		DRM_DEBUG_KMS("No memory space for child device\n");
+		return;
+	}
+
+	dev_priv->vbt.child_dev_num = count;
+	count = 0;
+	for (i = 0; i < child_device_num; i++) {
+		child = child_device_ptr(defs, i);
+		if (!child->device_type)
+			continue;
+
+		/*
+		 * Copy as much as we know (sizeof) and is available
+		 * (child_dev_size) of the child device. Accessing the data must
+		 * depend on VBT version.
+		 */
+		memcpy(dev_priv->vbt.child_dev + count, child,
+		       min_t(size_t, defs->child_dev_size, sizeof(*child)));
+		count++;
+	}
+}
+
+/* Common defaults which may be overridden by VBT. */
+static void
+init_vbt_defaults(struct drm_i915_private *dev_priv)
+{
+	enum port port;
+
+	dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
+
+	/* Default to having backlight */
+	dev_priv->vbt.backlight.present = true;
+
+	/* LFP panel data */
+	dev_priv->vbt.lvds_dither = 1;
+
+	/* SDVO panel data */
+	dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
+
+	/* general features */
+	dev_priv->vbt.int_tv_support = 1;
+	dev_priv->vbt.int_crt_support = 1;
+
+	/* driver features */
+	dev_priv->vbt.int_lvds_support = 1;
+
+	/* Default to using SSC */
+	dev_priv->vbt.lvds_use_ssc = 1;
+	/*
+	 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
+	 * clock for LVDS.
+	 */
+	dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
+			!HAS_PCH_SPLIT(dev_priv));
+	DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
+
+	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
+		struct ddi_vbt_port_info *info =
+			&dev_priv->vbt.ddi_port_info[port];
+
+		info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
+	}
+}
+
+/* Defaults to initialize only if there is no VBT. */
+static void
+init_vbt_missing_defaults(struct drm_i915_private *dev_priv)
+{
+	enum port port;
+
+	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
+		struct ddi_vbt_port_info *info =
+			&dev_priv->vbt.ddi_port_info[port];
+
+		/*
+		 * VBT has the TypeC mode (native,TBT/USB) and we don't want
+		 * to detect it.
+		 */
+		if (intel_port_is_tc(dev_priv, port))
+			continue;
+
+		info->supports_dvi = (port != PORT_A && port != PORT_E);
+		info->supports_hdmi = info->supports_dvi;
+		info->supports_dp = (port != PORT_E);
+		info->supports_edp = (port == PORT_A);
+	}
+}
+
+static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
+{
+	const void *_vbt = vbt;
+
+	return _vbt + vbt->bdb_offset;
+}
+
+/**
+ * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
+ * @buf:	pointer to a buffer to validate
+ * @size:	size of the buffer
+ *
+ * Returns true on valid VBT.
+ */
+bool intel_bios_is_valid_vbt(const void *buf, size_t size)
+{
+	const struct vbt_header *vbt = buf;
+	const struct bdb_header *bdb;
+
+	if (!vbt)
+		return false;
+
+	if (sizeof(struct vbt_header) > size) {
+		DRM_DEBUG_DRIVER("VBT header incomplete\n");
+		return false;
+	}
+
+	if (memcmp(vbt->signature, "$VBT", 4)) {
+		DRM_DEBUG_DRIVER("VBT invalid signature\n");
+		return false;
+	}
+
+	if (range_overflows_t(size_t,
+			      vbt->bdb_offset,
+			      sizeof(struct bdb_header),
+			      size)) {
+		DRM_DEBUG_DRIVER("BDB header incomplete\n");
+		return false;
+	}
+
+	bdb = get_bdb_header(vbt);
+	if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
+		DRM_DEBUG_DRIVER("BDB incomplete\n");
+		return false;
+	}
+
+	return vbt;
+}
+
+static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
+{
+	size_t i;
+
+	/* Scour memory looking for the VBT signature. */
+	for (i = 0; i + 4 < size; i++) {
+		void *vbt;
+
+		if (ioread32(bios + i) != *((const u32 *) "$VBT"))
+			continue;
+
+		/*
+		 * This is the one place where we explicitly discard the address
+		 * space (__iomem) of the BIOS/VBT.
+		 */
+		vbt = (void __force *) bios + i;
+		if (intel_bios_is_valid_vbt(vbt, size - i))
+			return vbt;
+
+		break;
+	}
+
+	return NULL;
+}
+
+/**
+ * intel_bios_init - find VBT and initialize settings from the BIOS
+ * @dev_priv: i915 device instance
+ *
+ * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
+ * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
+ * initialize some defaults if the VBT is not present at all.
+ */
+void intel_bios_init(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	const struct vbt_header *vbt = dev_priv->opregion.vbt;
+	const struct bdb_header *bdb;
+	u8 __iomem *bios = NULL;
+
+	if (!HAS_DISPLAY(dev_priv)) {
+		DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n");
+		return;
+	}
+
+	init_vbt_defaults(dev_priv);
+
+	/* If the OpRegion does not have VBT, look in PCI ROM. */
+	if (!vbt) {
+		size_t size;
+
+		bios = pci_map_rom(pdev, &size);
+		if (!bios)
+			goto out;
+
+		vbt = find_vbt(bios, size);
+		if (!vbt)
+			goto out;
+
+		DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
+	}
+
+	bdb = get_bdb_header(vbt);
+
+	DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
+		      (int)sizeof(vbt->signature), vbt->signature, bdb->version);
+
+	/* Grab useful general definitions */
+	parse_general_features(dev_priv, bdb);
+	parse_general_definitions(dev_priv, bdb);
+	parse_lfp_panel_data(dev_priv, bdb);
+	parse_lfp_backlight(dev_priv, bdb);
+	parse_sdvo_panel_data(dev_priv, bdb);
+	parse_driver_features(dev_priv, bdb);
+	parse_edp(dev_priv, bdb);
+	parse_psr(dev_priv, bdb);
+	parse_mipi_config(dev_priv, bdb);
+	parse_mipi_sequence(dev_priv, bdb);
+
+	/* Further processing on pre-parsed data */
+	parse_sdvo_device_mapping(dev_priv, bdb->version);
+	parse_ddi_ports(dev_priv, bdb->version);
+
+out:
+	if (!vbt) {
+		DRM_INFO("Failed to find VBIOS tables (VBT)\n");
+		init_vbt_missing_defaults(dev_priv);
+	}
+
+	if (bios)
+		pci_unmap_rom(pdev, bios);
+}
+
+/**
+ * intel_bios_cleanup - Free any resources allocated by intel_bios_init()
+ * @dev_priv: i915 device instance
+ */
+void intel_bios_cleanup(struct drm_i915_private *dev_priv)
+{
+	kfree(dev_priv->vbt.child_dev);
+	dev_priv->vbt.child_dev = NULL;
+	dev_priv->vbt.child_dev_num = 0;
+	kfree(dev_priv->vbt.sdvo_lvds_vbt_mode);
+	dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
+	kfree(dev_priv->vbt.lfp_lvds_vbt_mode);
+	dev_priv->vbt.lfp_lvds_vbt_mode = NULL;
+	kfree(dev_priv->vbt.dsi.data);
+	dev_priv->vbt.dsi.data = NULL;
+	kfree(dev_priv->vbt.dsi.pps);
+	dev_priv->vbt.dsi.pps = NULL;
+	kfree(dev_priv->vbt.dsi.config);
+	dev_priv->vbt.dsi.config = NULL;
+	kfree(dev_priv->vbt.dsi.deassert_seq);
+	dev_priv->vbt.dsi.deassert_seq = NULL;
+}
+
+/**
+ * intel_bios_is_tv_present - is integrated TV present in VBT
+ * @dev_priv:	i915 device instance
+ *
+ * Return true if TV is present. If no child devices were parsed from VBT,
+ * assume TV is present.
+ */
+bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
+{
+	const struct child_device_config *child;
+	int i;
+
+	if (!dev_priv->vbt.int_tv_support)
+		return false;
+
+	if (!dev_priv->vbt.child_dev_num)
+		return true;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+		/*
+		 * If the device type is not TV, continue.
+		 */
+		switch (child->device_type) {
+		case DEVICE_TYPE_INT_TV:
+		case DEVICE_TYPE_TV:
+		case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
+			break;
+		default:
+			continue;
+		}
+		/* Only when the addin_offset is non-zero, it is regarded
+		 * as present.
+		 */
+		if (child->addin_offset)
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * intel_bios_is_lvds_present - is LVDS present in VBT
+ * @dev_priv:	i915 device instance
+ * @i2c_pin:	i2c pin for LVDS if present
+ *
+ * Return true if LVDS is present. If no child devices were parsed from VBT,
+ * assume LVDS is present.
+ */
+bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
+{
+	const struct child_device_config *child;
+	int i;
+
+	if (!dev_priv->vbt.child_dev_num)
+		return true;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		/* If the device type is not LFP, continue.
+		 * We have to check both the new identifiers as well as the
+		 * old for compatibility with some BIOSes.
+		 */
+		if (child->device_type != DEVICE_TYPE_INT_LFP &&
+		    child->device_type != DEVICE_TYPE_LFP)
+			continue;
+
+		if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
+			*i2c_pin = child->i2c_pin;
+
+		/* However, we cannot trust the BIOS writers to populate
+		 * the VBT correctly.  Since LVDS requires additional
+		 * information from AIM blocks, a non-zero addin offset is
+		 * a good indicator that the LVDS is actually present.
+		 */
+		if (child->addin_offset)
+			return true;
+
+		/* But even then some BIOS writers perform some black magic
+		 * and instantiate the device without reference to any
+		 * additional data.  Trust that if the VBT was written into
+		 * the OpRegion then they have validated the LVDS's existence.
+		 */
+		if (dev_priv->opregion.vbt)
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * intel_bios_is_port_present - is the specified digital port present
+ * @dev_priv:	i915 device instance
+ * @port:	port to check
+ *
+ * Return true if the device in %port is present.
+ */
+bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
+{
+	const struct child_device_config *child;
+	static const struct {
+		u16 dp, hdmi;
+	} port_mapping[] = {
+		[PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
+		[PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
+		[PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
+		[PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
+		[PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
+	};
+	int i;
+
+	if (HAS_DDI(dev_priv)) {
+		const struct ddi_vbt_port_info *port_info =
+			&dev_priv->vbt.ddi_port_info[port];
+
+		return port_info->supports_dp ||
+		       port_info->supports_dvi ||
+		       port_info->supports_hdmi;
+	}
+
+	/* FIXME maybe deal with port A as well? */
+	if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
+		return false;
+
+	if (!dev_priv->vbt.child_dev_num)
+		return false;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		if ((child->dvo_port == port_mapping[port].dp ||
+		     child->dvo_port == port_mapping[port].hdmi) &&
+		    (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
+					   DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * intel_bios_is_port_edp - is the device in given port eDP
+ * @dev_priv:	i915 device instance
+ * @port:	port to check
+ *
+ * Return true if the device in %port is eDP.
+ */
+bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
+{
+	const struct child_device_config *child;
+	static const short port_mapping[] = {
+		[PORT_B] = DVO_PORT_DPB,
+		[PORT_C] = DVO_PORT_DPC,
+		[PORT_D] = DVO_PORT_DPD,
+		[PORT_E] = DVO_PORT_DPE,
+		[PORT_F] = DVO_PORT_DPF,
+	};
+	int i;
+
+	if (HAS_DDI(dev_priv))
+		return dev_priv->vbt.ddi_port_info[port].supports_edp;
+
+	if (!dev_priv->vbt.child_dev_num)
+		return false;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		if (child->dvo_port == port_mapping[port] &&
+		    (child->device_type & DEVICE_TYPE_eDP_BITS) ==
+		    (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
+			return true;
+	}
+
+	return false;
+}
+
+static bool child_dev_is_dp_dual_mode(const struct child_device_config *child,
+				      enum port port)
+{
+	static const struct {
+		u16 dp, hdmi;
+	} port_mapping[] = {
+		/*
+		 * Buggy VBTs may declare DP ports as having
+		 * HDMI type dvo_port :( So let's check both.
+		 */
+		[PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
+		[PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
+		[PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
+		[PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
+		[PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
+	};
+
+	if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
+		return false;
+
+	if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
+	    (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
+		return false;
+
+	if (child->dvo_port == port_mapping[port].dp)
+		return true;
+
+	/* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
+	if (child->dvo_port == port_mapping[port].hdmi &&
+	    child->aux_channel != 0)
+		return true;
+
+	return false;
+}
+
+bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv,
+				     enum port port)
+{
+	const struct child_device_config *child;
+	int i;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		if (child_dev_is_dp_dual_mode(child, port))
+			return true;
+	}
+
+	return false;
+}
+
+/**
+ * intel_bios_is_dsi_present - is DSI present in VBT
+ * @dev_priv:	i915 device instance
+ * @port:	port for DSI if present
+ *
+ * Return true if DSI is present, and return the port in %port.
+ */
+bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
+			       enum port *port)
+{
+	const struct child_device_config *child;
+	u8 dvo_port;
+	int i;
+
+	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
+		child = dev_priv->vbt.child_dev + i;
+
+		if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
+			continue;
+
+		dvo_port = child->dvo_port;
+
+		if (dvo_port == DVO_PORT_MIPIA ||
+		    (dvo_port == DVO_PORT_MIPIB && INTEL_GEN(dev_priv) >= 11) ||
+		    (dvo_port == DVO_PORT_MIPIC && INTEL_GEN(dev_priv) < 11)) {
+			if (port)
+				*port = dvo_port - DVO_PORT_MIPIA;
+			return true;
+		} else if (dvo_port == DVO_PORT_MIPIB ||
+			   dvo_port == DVO_PORT_MIPIC ||
+			   dvo_port == DVO_PORT_MIPID) {
+			DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
+				      port_name(dvo_port - DVO_PORT_MIPIA));
+		}
+	}
+
+	return false;
+}
+
+/**
+ * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
+ * @i915:	i915 device instance
+ * @port:	port to check
+ *
+ * Return true if HPD should be inverted for %port.
+ */
+bool
+intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
+				enum port port)
+{
+	const struct child_device_config *child =
+		i915->vbt.ddi_port_info[port].child;
+
+	if (WARN_ON_ONCE(!IS_GEN9_LP(i915)))
+		return false;
+
+	return child && child->hpd_invert;
+}
+
+/**
+ * intel_bios_is_lspcon_present - if LSPCON is attached on %port
+ * @i915:	i915 device instance
+ * @port:	port to check
+ *
+ * Return true if LSPCON is present on this port
+ */
+bool
+intel_bios_is_lspcon_present(const struct drm_i915_private *i915,
+			     enum port port)
+{
+	const struct child_device_config *child =
+		i915->vbt.ddi_port_info[port].child;
+
+	return HAS_LSPCON(i915) && child && child->lspcon;
+}
+
+enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *dev_priv,
+				   enum port port)
+{
+	const struct ddi_vbt_port_info *info =
+		&dev_priv->vbt.ddi_port_info[port];
+	enum aux_ch aux_ch;
+
+	if (!info->alternate_aux_channel) {
+		aux_ch = (enum aux_ch)port;
+
+		DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n",
+			      aux_ch_name(aux_ch), port_name(port));
+		return aux_ch;
+	}
+
+	switch (info->alternate_aux_channel) {
+	case DP_AUX_A:
+		aux_ch = AUX_CH_A;
+		break;
+	case DP_AUX_B:
+		aux_ch = AUX_CH_B;
+		break;
+	case DP_AUX_C:
+		aux_ch = AUX_CH_C;
+		break;
+	case DP_AUX_D:
+		aux_ch = AUX_CH_D;
+		break;
+	case DP_AUX_E:
+		aux_ch = AUX_CH_E;
+		break;
+	case DP_AUX_F:
+		aux_ch = AUX_CH_F;
+		break;
+	default:
+		MISSING_CASE(info->alternate_aux_channel);
+		aux_ch = AUX_CH_A;
+		break;
+	}
+
+	DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n",
+		      aux_ch_name(aux_ch), port_name(port));
+
+	return aux_ch;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h
new file mode 100644
index 000000000000..4e42cfaf61a7
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_bios.h
@@ -0,0 +1,244 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * Please use intel_vbt_defs.h for VBT private data, to hide and abstract away
+ * the VBT from the rest of the driver. Add the parsed, clean data to struct
+ * intel_vbt_data within struct drm_i915_private.
+ */
+
+#ifndef _INTEL_BIOS_H_
+#define _INTEL_BIOS_H_
+
+#include <linux/types.h>
+
+#include <drm/i915_drm.h>
+
+struct drm_i915_private;
+
+enum intel_backlight_type {
+	INTEL_BACKLIGHT_PMIC,
+	INTEL_BACKLIGHT_LPSS,
+	INTEL_BACKLIGHT_DISPLAY_DDI,
+	INTEL_BACKLIGHT_DSI_DCS,
+	INTEL_BACKLIGHT_PANEL_DRIVER_INTERFACE,
+};
+
+struct edp_power_seq {
+	u16 t1_t3;
+	u16 t8;
+	u16 t9;
+	u16 t10;
+	u16 t11_t12;
+} __packed;
+
+/*
+ * MIPI Sequence Block definitions
+ *
+ * Note the VBT spec has AssertReset / DeassertReset swapped from their
+ * usual naming, we use the proper names here to avoid confusion when
+ * reading the code.
+ */
+enum mipi_seq {
+	MIPI_SEQ_END = 0,
+	MIPI_SEQ_DEASSERT_RESET,	/* Spec says MipiAssertResetPin */
+	MIPI_SEQ_INIT_OTP,
+	MIPI_SEQ_DISPLAY_ON,
+	MIPI_SEQ_DISPLAY_OFF,
+	MIPI_SEQ_ASSERT_RESET,		/* Spec says MipiDeassertResetPin */
+	MIPI_SEQ_BACKLIGHT_ON,		/* sequence block v2+ */
+	MIPI_SEQ_BACKLIGHT_OFF,		/* sequence block v2+ */
+	MIPI_SEQ_TEAR_ON,		/* sequence block v2+ */
+	MIPI_SEQ_TEAR_OFF,		/* sequence block v3+ */
+	MIPI_SEQ_POWER_ON,		/* sequence block v3+ */
+	MIPI_SEQ_POWER_OFF,		/* sequence block v3+ */
+	MIPI_SEQ_MAX
+};
+
+enum mipi_seq_element {
+	MIPI_SEQ_ELEM_END = 0,
+	MIPI_SEQ_ELEM_SEND_PKT,
+	MIPI_SEQ_ELEM_DELAY,
+	MIPI_SEQ_ELEM_GPIO,
+	MIPI_SEQ_ELEM_I2C,		/* sequence block v2+ */
+	MIPI_SEQ_ELEM_SPI,		/* sequence block v3+ */
+	MIPI_SEQ_ELEM_PMIC,		/* sequence block v3+ */
+	MIPI_SEQ_ELEM_MAX
+};
+
+#define MIPI_DSI_UNDEFINED_PANEL_ID	0
+#define MIPI_DSI_GENERIC_PANEL_ID	1
+
+struct mipi_config {
+	u16 panel_id;
+
+	/* General Params */
+	u32 enable_dithering:1;
+	u32 rsvd1:1;
+	u32 is_bridge:1;
+
+	u32 panel_arch_type:2;
+	u32 is_cmd_mode:1;
+
+#define NON_BURST_SYNC_PULSE	0x1
+#define NON_BURST_SYNC_EVENTS	0x2
+#define BURST_MODE		0x3
+	u32 video_transfer_mode:2;
+
+	u32 cabc_supported:1;
+#define PPS_BLC_PMIC   0
+#define PPS_BLC_SOC    1
+	u32 pwm_blc:1;
+
+	/* Bit 13:10 */
+#define PIXEL_FORMAT_RGB565			0x1
+#define PIXEL_FORMAT_RGB666			0x2
+#define PIXEL_FORMAT_RGB666_LOOSELY_PACKED	0x3
+#define PIXEL_FORMAT_RGB888			0x4
+	u32 videomode_color_format:4;
+
+	/* Bit 15:14 */
+#define ENABLE_ROTATION_0	0x0
+#define ENABLE_ROTATION_90	0x1
+#define ENABLE_ROTATION_180	0x2
+#define ENABLE_ROTATION_270	0x3
+	u32 rotation:2;
+	u32 bta_enabled:1;
+	u32 rsvd2:15;
+
+	/* 2 byte Port Description */
+#define DUAL_LINK_NOT_SUPPORTED	0
+#define DUAL_LINK_FRONT_BACK	1
+#define DUAL_LINK_PIXEL_ALT	2
+	u16 dual_link:2;
+	u16 lane_cnt:2;
+	u16 pixel_overlap:3;
+	u16 rgb_flip:1;
+#define DL_DCS_PORT_A			0x00
+#define DL_DCS_PORT_C			0x01
+#define DL_DCS_PORT_A_AND_C		0x02
+	u16 dl_dcs_cabc_ports:2;
+	u16 dl_dcs_backlight_ports:2;
+	u16 rsvd3:4;
+
+	u16 rsvd4;
+
+	u8 rsvd5;
+	u32 target_burst_mode_freq;
+	u32 dsi_ddr_clk;
+	u32 bridge_ref_clk;
+
+#define  BYTE_CLK_SEL_20MHZ		0
+#define  BYTE_CLK_SEL_10MHZ		1
+#define  BYTE_CLK_SEL_5MHZ		2
+	u8 byte_clk_sel:2;
+
+	u8 rsvd6:6;
+
+	/* DPHY Flags */
+	u16 dphy_param_valid:1;
+	u16 eot_pkt_disabled:1;
+	u16 enable_clk_stop:1;
+	u16 rsvd7:13;
+
+	u32 hs_tx_timeout;
+	u32 lp_rx_timeout;
+	u32 turn_around_timeout;
+	u32 device_reset_timer;
+	u32 master_init_timer;
+	u32 dbi_bw_timer;
+	u32 lp_byte_clk_val;
+
+	/*  4 byte Dphy Params */
+	u32 prepare_cnt:6;
+	u32 rsvd8:2;
+	u32 clk_zero_cnt:8;
+	u32 trail_cnt:5;
+	u32 rsvd9:3;
+	u32 exit_zero_cnt:6;
+	u32 rsvd10:2;
+
+	u32 clk_lane_switch_cnt;
+	u32 hl_switch_cnt;
+
+	u32 rsvd11[6];
+
+	/* timings based on dphy spec */
+	u8 tclk_miss;
+	u8 tclk_post;
+	u8 rsvd12;
+	u8 tclk_pre;
+	u8 tclk_prepare;
+	u8 tclk_settle;
+	u8 tclk_term_enable;
+	u8 tclk_trail;
+	u16 tclk_prepare_clkzero;
+	u8 rsvd13;
+	u8 td_term_enable;
+	u8 teot;
+	u8 ths_exit;
+	u8 ths_prepare;
+	u16 ths_prepare_hszero;
+	u8 rsvd14;
+	u8 ths_settle;
+	u8 ths_skip;
+	u8 ths_trail;
+	u8 tinit;
+	u8 tlpx;
+	u8 rsvd15[3];
+
+	/* GPIOs */
+	u8 panel_enable;
+	u8 bl_enable;
+	u8 pwm_enable;
+	u8 reset_r_n;
+	u8 pwr_down_r;
+	u8 stdby_r_n;
+
+} __packed;
+
+/* all delays have a unit of 100us */
+struct mipi_pps_data {
+	u16 panel_on_delay;
+	u16 bl_enable_delay;
+	u16 bl_disable_delay;
+	u16 panel_off_delay;
+	u16 panel_power_cycle_delay;
+} __packed;
+
+void intel_bios_init(struct drm_i915_private *dev_priv);
+void intel_bios_cleanup(struct drm_i915_private *dev_priv);
+bool intel_bios_is_valid_vbt(const void *buf, size_t size);
+bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv);
+bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin);
+bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port);
+bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port);
+bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv, enum port port);
+bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, enum port *port);
+bool intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
+				     enum port port);
+bool intel_bios_is_lspcon_present(const struct drm_i915_private *i915,
+				  enum port port);
+enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *dev_priv, enum port port);
+
+#endif /* _INTEL_BIOS_H_ */
diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
new file mode 100644
index 000000000000..753ac3165061
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -0,0 +1,421 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <drm/drm_atomic_state_helper.h>
+
+#include "intel_bw.h"
+#include "intel_drv.h"
+#include "intel_sideband.h"
+
+/* Parameters for Qclk Geyserville (QGV) */
+struct intel_qgv_point {
+	u16 dclk, t_rp, t_rdpre, t_rc, t_ras, t_rcd;
+};
+
+struct intel_qgv_info {
+	struct intel_qgv_point points[3];
+	u8 num_points;
+	u8 num_channels;
+	u8 t_bl;
+	enum intel_dram_type dram_type;
+};
+
+static int icl_pcode_read_mem_global_info(struct drm_i915_private *dev_priv,
+					  struct intel_qgv_info *qi)
+{
+	u32 val = 0;
+	int ret;
+
+	ret = sandybridge_pcode_read(dev_priv,
+				     ICL_PCODE_MEM_SUBSYSYSTEM_INFO |
+				     ICL_PCODE_MEM_SS_READ_GLOBAL_INFO,
+				     &val, NULL);
+	if (ret)
+		return ret;
+
+	switch (val & 0xf) {
+	case 0:
+		qi->dram_type = INTEL_DRAM_DDR4;
+		break;
+	case 1:
+		qi->dram_type = INTEL_DRAM_DDR3;
+		break;
+	case 2:
+		qi->dram_type = INTEL_DRAM_LPDDR3;
+		break;
+	case 3:
+		qi->dram_type = INTEL_DRAM_LPDDR3;
+		break;
+	default:
+		MISSING_CASE(val & 0xf);
+		break;
+	}
+
+	qi->num_channels = (val & 0xf0) >> 4;
+	qi->num_points = (val & 0xf00) >> 8;
+
+	qi->t_bl = qi->dram_type == INTEL_DRAM_DDR4 ? 4 : 8;
+
+	return 0;
+}
+
+static int icl_pcode_read_qgv_point_info(struct drm_i915_private *dev_priv,
+					 struct intel_qgv_point *sp,
+					 int point)
+{
+	u32 val = 0, val2;
+	int ret;
+
+	ret = sandybridge_pcode_read(dev_priv,
+				     ICL_PCODE_MEM_SUBSYSYSTEM_INFO |
+				     ICL_PCODE_MEM_SS_READ_QGV_POINT_INFO(point),
+				     &val, &val2);
+	if (ret)
+		return ret;
+
+	sp->dclk = val & 0xffff;
+	sp->t_rp = (val & 0xff0000) >> 16;
+	sp->t_rcd = (val & 0xff000000) >> 24;
+
+	sp->t_rdpre = val2 & 0xff;
+	sp->t_ras = (val2 & 0xff00) >> 8;
+
+	sp->t_rc = sp->t_rp + sp->t_ras;
+
+	return 0;
+}
+
+static int icl_get_qgv_points(struct drm_i915_private *dev_priv,
+			      struct intel_qgv_info *qi)
+{
+	int i, ret;
+
+	ret = icl_pcode_read_mem_global_info(dev_priv, qi);
+	if (ret)
+		return ret;
+
+	if (WARN_ON(qi->num_points > ARRAY_SIZE(qi->points)))
+		qi->num_points = ARRAY_SIZE(qi->points);
+
+	for (i = 0; i < qi->num_points; i++) {
+		struct intel_qgv_point *sp = &qi->points[i];
+
+		ret = icl_pcode_read_qgv_point_info(dev_priv, sp, i);
+		if (ret)
+			return ret;
+
+		DRM_DEBUG_KMS("QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n",
+			      i, sp->dclk, sp->t_rp, sp->t_rdpre, sp->t_ras,
+			      sp->t_rcd, sp->t_rc);
+	}
+
+	return 0;
+}
+
+static int icl_calc_bw(int dclk, int num, int den)
+{
+	/* multiples of 16.666MHz (100/6) */
+	return DIV_ROUND_CLOSEST(num * dclk * 100, den * 6);
+}
+
+static int icl_sagv_max_dclk(const struct intel_qgv_info *qi)
+{
+	u16 dclk = 0;
+	int i;
+
+	for (i = 0; i < qi->num_points; i++)
+		dclk = max(dclk, qi->points[i].dclk);
+
+	return dclk;
+}
+
+struct intel_sa_info {
+	u8 deburst, mpagesize, deprogbwlimit, displayrtids;
+};
+
+static const struct intel_sa_info icl_sa_info = {
+	.deburst = 8,
+	.mpagesize = 16,
+	.deprogbwlimit = 25, /* GB/s */
+	.displayrtids = 128,
+};
+
+static int icl_get_bw_info(struct drm_i915_private *dev_priv)
+{
+	struct intel_qgv_info qi = {};
+	const struct intel_sa_info *sa = &icl_sa_info;
+	bool is_y_tile = true; /* assume y tile may be used */
+	int num_channels;
+	int deinterleave;
+	int ipqdepth, ipqdepthpch;
+	int dclk_max;
+	int maxdebw;
+	int i, ret;
+
+	ret = icl_get_qgv_points(dev_priv, &qi);
+	if (ret) {
+		DRM_DEBUG_KMS("Failed to get memory subsystem information, ignoring bandwidth limits");
+		return ret;
+	}
+	num_channels = qi.num_channels;
+
+	deinterleave = DIV_ROUND_UP(num_channels, is_y_tile ? 4 : 2);
+	dclk_max = icl_sagv_max_dclk(&qi);
+
+	ipqdepthpch = 16;
+
+	maxdebw = min(sa->deprogbwlimit * 1000,
+		      icl_calc_bw(dclk_max, 16, 1) * 6 / 10); /* 60% */
+	ipqdepth = min(ipqdepthpch, sa->displayrtids / num_channels);
+
+	for (i = 0; i < ARRAY_SIZE(dev_priv->max_bw); i++) {
+		struct intel_bw_info *bi = &dev_priv->max_bw[i];
+		int clpchgroup;
+		int j;
+
+		clpchgroup = (sa->deburst * deinterleave / num_channels) << i;
+		bi->num_planes = (ipqdepth - clpchgroup) / clpchgroup + 1;
+
+		for (j = 0; j < qi.num_points; j++) {
+			const struct intel_qgv_point *sp = &qi.points[j];
+			int ct, bw;
+
+			/*
+			 * Max row cycle time
+			 *
+			 * FIXME what is the logic behind the
+			 * assumed burst length?
+			 */
+			ct = max_t(int, sp->t_rc, sp->t_rp + sp->t_rcd +
+				   (clpchgroup - 1) * qi.t_bl + sp->t_rdpre);
+			bw = icl_calc_bw(sp->dclk, clpchgroup * 32 * num_channels, ct);
+
+			bi->deratedbw[j] = min(maxdebw,
+					       bw * 9 / 10); /* 90% */
+
+			DRM_DEBUG_KMS("BW%d / QGV %d: num_planes=%d deratedbw=%d\n",
+				      i, j, bi->num_planes, bi->deratedbw[j]);
+		}
+
+		if (bi->num_planes == 1)
+			break;
+	}
+
+	return 0;
+}
+
+static unsigned int icl_max_bw(struct drm_i915_private *dev_priv,
+			       int num_planes, int qgv_point)
+{
+	int i;
+
+	/* Did we initialize the bw limits successfully? */
+	if (dev_priv->max_bw[0].num_planes == 0)
+		return UINT_MAX;
+
+	for (i = 0; i < ARRAY_SIZE(dev_priv->max_bw); i++) {
+		const struct intel_bw_info *bi =
+			&dev_priv->max_bw[i];
+
+		if (num_planes >= bi->num_planes)
+			return bi->deratedbw[qgv_point];
+	}
+
+	return 0;
+}
+
+void intel_bw_init_hw(struct drm_i915_private *dev_priv)
+{
+	if (IS_GEN(dev_priv, 11))
+		icl_get_bw_info(dev_priv);
+}
+
+static unsigned int intel_max_data_rate(struct drm_i915_private *dev_priv,
+					int num_planes)
+{
+	if (IS_GEN(dev_priv, 11))
+		/*
+		 * FIXME with SAGV disabled maybe we can assume
+		 * point 1 will always be used? Seems to match
+		 * the behaviour observed in the wild.
+		 */
+		return min3(icl_max_bw(dev_priv, num_planes, 0),
+			    icl_max_bw(dev_priv, num_planes, 1),
+			    icl_max_bw(dev_priv, num_planes, 2));
+	else
+		return UINT_MAX;
+}
+
+static unsigned int intel_bw_crtc_num_active_planes(const struct intel_crtc_state *crtc_state)
+{
+	/*
+	 * We assume cursors are small enough
+	 * to not not cause bandwidth problems.
+	 */
+	return hweight8(crtc_state->active_planes & ~BIT(PLANE_CURSOR));
+}
+
+static unsigned int intel_bw_crtc_data_rate(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	unsigned int data_rate = 0;
+	enum plane_id plane_id;
+
+	for_each_plane_id_on_crtc(crtc, plane_id) {
+		/*
+		 * We assume cursors are small enough
+		 * to not not cause bandwidth problems.
+		 */
+		if (plane_id == PLANE_CURSOR)
+			continue;
+
+		data_rate += crtc_state->data_rate[plane_id];
+	}
+
+	return data_rate;
+}
+
+void intel_bw_crtc_update(struct intel_bw_state *bw_state,
+			  const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	bw_state->data_rate[crtc->pipe] =
+		intel_bw_crtc_data_rate(crtc_state);
+	bw_state->num_active_planes[crtc->pipe] =
+		intel_bw_crtc_num_active_planes(crtc_state);
+
+	DRM_DEBUG_KMS("pipe %c data rate %u num active planes %u\n",
+		      pipe_name(crtc->pipe),
+		      bw_state->data_rate[crtc->pipe],
+		      bw_state->num_active_planes[crtc->pipe]);
+}
+
+static unsigned int intel_bw_num_active_planes(struct drm_i915_private *dev_priv,
+					       const struct intel_bw_state *bw_state)
+{
+	unsigned int num_active_planes = 0;
+	enum pipe pipe;
+
+	for_each_pipe(dev_priv, pipe)
+		num_active_planes += bw_state->num_active_planes[pipe];
+
+	return num_active_planes;
+}
+
+static unsigned int intel_bw_data_rate(struct drm_i915_private *dev_priv,
+				       const struct intel_bw_state *bw_state)
+{
+	unsigned int data_rate = 0;
+	enum pipe pipe;
+
+	for_each_pipe(dev_priv, pipe)
+		data_rate += bw_state->data_rate[pipe];
+
+	return data_rate;
+}
+
+int intel_bw_atomic_check(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc_state *new_crtc_state, *old_crtc_state;
+	struct intel_bw_state *bw_state = NULL;
+	unsigned int data_rate, max_data_rate;
+	unsigned int num_active_planes;
+	struct intel_crtc *crtc;
+	int i;
+
+	/* FIXME earlier gens need some checks too */
+	if (INTEL_GEN(dev_priv) < 11)
+		return 0;
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		unsigned int old_data_rate =
+			intel_bw_crtc_data_rate(old_crtc_state);
+		unsigned int new_data_rate =
+			intel_bw_crtc_data_rate(new_crtc_state);
+		unsigned int old_active_planes =
+			intel_bw_crtc_num_active_planes(old_crtc_state);
+		unsigned int new_active_planes =
+			intel_bw_crtc_num_active_planes(new_crtc_state);
+
+		/*
+		 * Avoid locking the bw state when
+		 * nothing significant has changed.
+		 */
+		if (old_data_rate == new_data_rate &&
+		    old_active_planes == new_active_planes)
+			continue;
+
+		bw_state  = intel_atomic_get_bw_state(state);
+		if (IS_ERR(bw_state))
+			return PTR_ERR(bw_state);
+
+		bw_state->data_rate[crtc->pipe] = new_data_rate;
+		bw_state->num_active_planes[crtc->pipe] = new_active_planes;
+
+		DRM_DEBUG_KMS("pipe %c data rate %u num active planes %u\n",
+			      pipe_name(crtc->pipe),
+			      bw_state->data_rate[crtc->pipe],
+			      bw_state->num_active_planes[crtc->pipe]);
+	}
+
+	if (!bw_state)
+		return 0;
+
+	data_rate = intel_bw_data_rate(dev_priv, bw_state);
+	num_active_planes = intel_bw_num_active_planes(dev_priv, bw_state);
+
+	max_data_rate = intel_max_data_rate(dev_priv, num_active_planes);
+
+	data_rate = DIV_ROUND_UP(data_rate, 1000);
+
+	if (data_rate > max_data_rate) {
+		DRM_DEBUG_KMS("Bandwidth %u MB/s exceeds max available %d MB/s (%d active planes)\n",
+			      data_rate, max_data_rate, num_active_planes);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct drm_private_state *intel_bw_duplicate_state(struct drm_private_obj *obj)
+{
+	struct intel_bw_state *state;
+
+	state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
+
+	return &state->base;
+}
+
+static void intel_bw_destroy_state(struct drm_private_obj *obj,
+				   struct drm_private_state *state)
+{
+	kfree(state);
+}
+
+static const struct drm_private_state_funcs intel_bw_funcs = {
+	.atomic_duplicate_state = intel_bw_duplicate_state,
+	.atomic_destroy_state = intel_bw_destroy_state,
+};
+
+int intel_bw_init(struct drm_i915_private *dev_priv)
+{
+	struct intel_bw_state *state;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return -ENOMEM;
+
+	drm_atomic_private_obj_init(&dev_priv->drm, &dev_priv->bw_obj,
+				    &state->base, &intel_bw_funcs);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_bw.h b/drivers/gpu/drm/i915/display/intel_bw.h
new file mode 100644
index 000000000000..e9d9c6d63bc3
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_bw.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_BW_H__
+#define __INTEL_BW_H__
+
+#include <drm/drm_atomic.h>
+
+#include "i915_drv.h"
+#include "intel_display.h"
+
+struct drm_i915_private;
+struct intel_atomic_state;
+struct intel_crtc_state;
+
+struct intel_bw_state {
+	struct drm_private_state base;
+
+	unsigned int data_rate[I915_MAX_PIPES];
+	u8 num_active_planes[I915_MAX_PIPES];
+};
+
+#define to_intel_bw_state(x) container_of((x), struct intel_bw_state, base)
+
+static inline struct intel_bw_state *
+intel_atomic_get_bw_state(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct drm_private_state *bw_state;
+
+	bw_state = drm_atomic_get_private_obj_state(&state->base,
+						    &dev_priv->bw_obj);
+	if (IS_ERR(bw_state))
+		return ERR_CAST(bw_state);
+
+	return to_intel_bw_state(bw_state);
+}
+
+void intel_bw_init_hw(struct drm_i915_private *dev_priv);
+int intel_bw_init(struct drm_i915_private *dev_priv);
+int intel_bw_atomic_check(struct intel_atomic_state *state);
+void intel_bw_crtc_update(struct intel_bw_state *bw_state,
+			  const struct intel_crtc_state *crtc_state);
+
+#endif /* __INTEL_BW_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
new file mode 100644
index 000000000000..8993ab283562
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -0,0 +1,2853 @@
+/*
+ * Copyright © 2006-2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "intel_cdclk.h"
+#include "intel_drv.h"
+#include "intel_sideband.h"
+
+/**
+ * DOC: CDCLK / RAWCLK
+ *
+ * The display engine uses several different clocks to do its work. There
+ * are two main clocks involved that aren't directly related to the actual
+ * pixel clock or any symbol/bit clock of the actual output port. These
+ * are the core display clock (CDCLK) and RAWCLK.
+ *
+ * CDCLK clocks most of the display pipe logic, and thus its frequency
+ * must be high enough to support the rate at which pixels are flowing
+ * through the pipes. Downscaling must also be accounted as that increases
+ * the effective pixel rate.
+ *
+ * On several platforms the CDCLK frequency can be changed dynamically
+ * to minimize power consumption for a given display configuration.
+ * Typically changes to the CDCLK frequency require all the display pipes
+ * to be shut down while the frequency is being changed.
+ *
+ * On SKL+ the DMC will toggle the CDCLK off/on during DC5/6 entry/exit.
+ * DMC will not change the active CDCLK frequency however, so that part
+ * will still be performed by the driver directly.
+ *
+ * RAWCLK is a fixed frequency clock, often used by various auxiliary
+ * blocks such as AUX CH or backlight PWM. Hence the only thing we
+ * really need to know about RAWCLK is its frequency so that various
+ * dividers can be programmed correctly.
+ */
+
+static void fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv,
+				   struct intel_cdclk_state *cdclk_state)
+{
+	cdclk_state->cdclk = 133333;
+}
+
+static void fixed_200mhz_get_cdclk(struct drm_i915_private *dev_priv,
+				   struct intel_cdclk_state *cdclk_state)
+{
+	cdclk_state->cdclk = 200000;
+}
+
+static void fixed_266mhz_get_cdclk(struct drm_i915_private *dev_priv,
+				   struct intel_cdclk_state *cdclk_state)
+{
+	cdclk_state->cdclk = 266667;
+}
+
+static void fixed_333mhz_get_cdclk(struct drm_i915_private *dev_priv,
+				   struct intel_cdclk_state *cdclk_state)
+{
+	cdclk_state->cdclk = 333333;
+}
+
+static void fixed_400mhz_get_cdclk(struct drm_i915_private *dev_priv,
+				   struct intel_cdclk_state *cdclk_state)
+{
+	cdclk_state->cdclk = 400000;
+}
+
+static void fixed_450mhz_get_cdclk(struct drm_i915_private *dev_priv,
+				   struct intel_cdclk_state *cdclk_state)
+{
+	cdclk_state->cdclk = 450000;
+}
+
+static void i85x_get_cdclk(struct drm_i915_private *dev_priv,
+			   struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 hpllcc = 0;
+
+	/*
+	 * 852GM/852GMV only supports 133 MHz and the HPLLCC
+	 * encoding is different :(
+	 * FIXME is this the right way to detect 852GM/852GMV?
+	 */
+	if (pdev->revision == 0x1) {
+		cdclk_state->cdclk = 133333;
+		return;
+	}
+
+	pci_bus_read_config_word(pdev->bus,
+				 PCI_DEVFN(0, 3), HPLLCC, &hpllcc);
+
+	/* Assume that the hardware is in the high speed state.  This
+	 * should be the default.
+	 */
+	switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
+	case GC_CLOCK_133_200:
+	case GC_CLOCK_133_200_2:
+	case GC_CLOCK_100_200:
+		cdclk_state->cdclk = 200000;
+		break;
+	case GC_CLOCK_166_250:
+		cdclk_state->cdclk = 250000;
+		break;
+	case GC_CLOCK_100_133:
+		cdclk_state->cdclk = 133333;
+		break;
+	case GC_CLOCK_133_266:
+	case GC_CLOCK_133_266_2:
+	case GC_CLOCK_166_266:
+		cdclk_state->cdclk = 266667;
+		break;
+	}
+}
+
+static void i915gm_get_cdclk(struct drm_i915_private *dev_priv,
+			     struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 gcfgc = 0;
+
+	pci_read_config_word(pdev, GCFGC, &gcfgc);
+
+	if (gcfgc & GC_LOW_FREQUENCY_ENABLE) {
+		cdclk_state->cdclk = 133333;
+		return;
+	}
+
+	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+	case GC_DISPLAY_CLOCK_333_320_MHZ:
+		cdclk_state->cdclk = 333333;
+		break;
+	default:
+	case GC_DISPLAY_CLOCK_190_200_MHZ:
+		cdclk_state->cdclk = 190000;
+		break;
+	}
+}
+
+static void i945gm_get_cdclk(struct drm_i915_private *dev_priv,
+			     struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 gcfgc = 0;
+
+	pci_read_config_word(pdev, GCFGC, &gcfgc);
+
+	if (gcfgc & GC_LOW_FREQUENCY_ENABLE) {
+		cdclk_state->cdclk = 133333;
+		return;
+	}
+
+	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+	case GC_DISPLAY_CLOCK_333_320_MHZ:
+		cdclk_state->cdclk = 320000;
+		break;
+	default:
+	case GC_DISPLAY_CLOCK_190_200_MHZ:
+		cdclk_state->cdclk = 200000;
+		break;
+	}
+}
+
+static unsigned int intel_hpll_vco(struct drm_i915_private *dev_priv)
+{
+	static const unsigned int blb_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 4800000,
+		[4] = 6400000,
+	};
+	static const unsigned int pnv_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 4800000,
+		[4] = 2666667,
+	};
+	static const unsigned int cl_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 6400000,
+		[4] = 3333333,
+		[5] = 3566667,
+		[6] = 4266667,
+	};
+	static const unsigned int elk_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 4800000,
+	};
+	static const unsigned int ctg_vco[8] = {
+		[0] = 3200000,
+		[1] = 4000000,
+		[2] = 5333333,
+		[3] = 6400000,
+		[4] = 2666667,
+		[5] = 4266667,
+	};
+	const unsigned int *vco_table;
+	unsigned int vco;
+	u8 tmp = 0;
+
+	/* FIXME other chipsets? */
+	if (IS_GM45(dev_priv))
+		vco_table = ctg_vco;
+	else if (IS_G45(dev_priv))
+		vco_table = elk_vco;
+	else if (IS_I965GM(dev_priv))
+		vco_table = cl_vco;
+	else if (IS_PINEVIEW(dev_priv))
+		vco_table = pnv_vco;
+	else if (IS_G33(dev_priv))
+		vco_table = blb_vco;
+	else
+		return 0;
+
+	tmp = I915_READ(IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv) ?
+			HPLLVCO_MOBILE : HPLLVCO);
+
+	vco = vco_table[tmp & 0x7];
+	if (vco == 0)
+		DRM_ERROR("Bad HPLL VCO (HPLLVCO=0x%02x)\n", tmp);
+	else
+		DRM_DEBUG_KMS("HPLL VCO %u kHz\n", vco);
+
+	return vco;
+}
+
+static void g33_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	static const u8 div_3200[] = { 12, 10,  8,  7, 5, 16 };
+	static const u8 div_4000[] = { 14, 12, 10,  8, 6, 20 };
+	static const u8 div_4800[] = { 20, 14, 12, 10, 8, 24 };
+	static const u8 div_5333[] = { 20, 16, 12, 12, 8, 28 };
+	const u8 *div_table;
+	unsigned int cdclk_sel;
+	u16 tmp = 0;
+
+	cdclk_state->vco = intel_hpll_vco(dev_priv);
+
+	pci_read_config_word(pdev, GCFGC, &tmp);
+
+	cdclk_sel = (tmp >> 4) & 0x7;
+
+	if (cdclk_sel >= ARRAY_SIZE(div_3200))
+		goto fail;
+
+	switch (cdclk_state->vco) {
+	case 3200000:
+		div_table = div_3200;
+		break;
+	case 4000000:
+		div_table = div_4000;
+		break;
+	case 4800000:
+		div_table = div_4800;
+		break;
+	case 5333333:
+		div_table = div_5333;
+		break;
+	default:
+		goto fail;
+	}
+
+	cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco,
+					       div_table[cdclk_sel]);
+	return;
+
+fail:
+	DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n",
+		  cdclk_state->vco, tmp);
+	cdclk_state->cdclk = 190476;
+}
+
+static void pnv_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u16 gcfgc = 0;
+
+	pci_read_config_word(pdev, GCFGC, &gcfgc);
+
+	switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
+	case GC_DISPLAY_CLOCK_267_MHZ_PNV:
+		cdclk_state->cdclk = 266667;
+		break;
+	case GC_DISPLAY_CLOCK_333_MHZ_PNV:
+		cdclk_state->cdclk = 333333;
+		break;
+	case GC_DISPLAY_CLOCK_444_MHZ_PNV:
+		cdclk_state->cdclk = 444444;
+		break;
+	case GC_DISPLAY_CLOCK_200_MHZ_PNV:
+		cdclk_state->cdclk = 200000;
+		break;
+	default:
+		DRM_ERROR("Unknown pnv display core clock 0x%04x\n", gcfgc);
+		/* fall through */
+	case GC_DISPLAY_CLOCK_133_MHZ_PNV:
+		cdclk_state->cdclk = 133333;
+		break;
+	case GC_DISPLAY_CLOCK_167_MHZ_PNV:
+		cdclk_state->cdclk = 166667;
+		break;
+	}
+}
+
+static void i965gm_get_cdclk(struct drm_i915_private *dev_priv,
+			     struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	static const u8 div_3200[] = { 16, 10,  8 };
+	static const u8 div_4000[] = { 20, 12, 10 };
+	static const u8 div_5333[] = { 24, 16, 14 };
+	const u8 *div_table;
+	unsigned int cdclk_sel;
+	u16 tmp = 0;
+
+	cdclk_state->vco = intel_hpll_vco(dev_priv);
+
+	pci_read_config_word(pdev, GCFGC, &tmp);
+
+	cdclk_sel = ((tmp >> 8) & 0x1f) - 1;
+
+	if (cdclk_sel >= ARRAY_SIZE(div_3200))
+		goto fail;
+
+	switch (cdclk_state->vco) {
+	case 3200000:
+		div_table = div_3200;
+		break;
+	case 4000000:
+		div_table = div_4000;
+		break;
+	case 5333333:
+		div_table = div_5333;
+		break;
+	default:
+		goto fail;
+	}
+
+	cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco,
+					       div_table[cdclk_sel]);
+	return;
+
+fail:
+	DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n",
+		  cdclk_state->vco, tmp);
+	cdclk_state->cdclk = 200000;
+}
+
+static void gm45_get_cdclk(struct drm_i915_private *dev_priv,
+			   struct intel_cdclk_state *cdclk_state)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	unsigned int cdclk_sel;
+	u16 tmp = 0;
+
+	cdclk_state->vco = intel_hpll_vco(dev_priv);
+
+	pci_read_config_word(pdev, GCFGC, &tmp);
+
+	cdclk_sel = (tmp >> 12) & 0x1;
+
+	switch (cdclk_state->vco) {
+	case 2666667:
+	case 4000000:
+	case 5333333:
+		cdclk_state->cdclk = cdclk_sel ? 333333 : 222222;
+		break;
+	case 3200000:
+		cdclk_state->cdclk = cdclk_sel ? 320000 : 228571;
+		break;
+	default:
+		DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n",
+			  cdclk_state->vco, tmp);
+		cdclk_state->cdclk = 222222;
+		break;
+	}
+}
+
+static void hsw_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	u32 lcpll = I915_READ(LCPLL_CTL);
+	u32 freq = lcpll & LCPLL_CLK_FREQ_MASK;
+
+	if (lcpll & LCPLL_CD_SOURCE_FCLK)
+		cdclk_state->cdclk = 800000;
+	else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+		cdclk_state->cdclk = 450000;
+	else if (freq == LCPLL_CLK_FREQ_450)
+		cdclk_state->cdclk = 450000;
+	else if (IS_HSW_ULT(dev_priv))
+		cdclk_state->cdclk = 337500;
+	else
+		cdclk_state->cdclk = 540000;
+}
+
+static int vlv_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk)
+{
+	int freq_320 = (dev_priv->hpll_freq <<  1) % 320000 != 0 ?
+		333333 : 320000;
+
+	/*
+	 * We seem to get an unstable or solid color picture at 200MHz.
+	 * Not sure what's wrong. For now use 200MHz only when all pipes
+	 * are off.
+	 */
+	if (IS_VALLEYVIEW(dev_priv) && min_cdclk > freq_320)
+		return 400000;
+	else if (min_cdclk > 266667)
+		return freq_320;
+	else if (min_cdclk > 0)
+		return 266667;
+	else
+		return 200000;
+}
+
+static u8 vlv_calc_voltage_level(struct drm_i915_private *dev_priv, int cdclk)
+{
+	if (IS_VALLEYVIEW(dev_priv)) {
+		if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */
+			return 2;
+		else if (cdclk >= 266667)
+			return 1;
+		else
+			return 0;
+	} else {
+		/*
+		 * Specs are full of misinformation, but testing on actual
+		 * hardware has shown that we just need to write the desired
+		 * CCK divider into the Punit register.
+		 */
+		return DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1;
+	}
+}
+
+static void vlv_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	u32 val;
+
+	vlv_iosf_sb_get(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT));
+
+	cdclk_state->vco = vlv_get_hpll_vco(dev_priv);
+	cdclk_state->cdclk = vlv_get_cck_clock(dev_priv, "cdclk",
+					       CCK_DISPLAY_CLOCK_CONTROL,
+					       cdclk_state->vco);
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
+
+	vlv_iosf_sb_put(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT));
+
+	if (IS_VALLEYVIEW(dev_priv))
+		cdclk_state->voltage_level = (val & DSPFREQGUAR_MASK) >>
+			DSPFREQGUAR_SHIFT;
+	else
+		cdclk_state->voltage_level = (val & DSPFREQGUAR_MASK_CHV) >>
+			DSPFREQGUAR_SHIFT_CHV;
+}
+
+static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv)
+{
+	unsigned int credits, default_credits;
+
+	if (IS_CHERRYVIEW(dev_priv))
+		default_credits = PFI_CREDIT(12);
+	else
+		default_credits = PFI_CREDIT(8);
+
+	if (dev_priv->cdclk.hw.cdclk >= dev_priv->czclk_freq) {
+		/* CHV suggested value is 31 or 63 */
+		if (IS_CHERRYVIEW(dev_priv))
+			credits = PFI_CREDIT_63;
+		else
+			credits = PFI_CREDIT(15);
+	} else {
+		credits = default_credits;
+	}
+
+	/*
+	 * WA - write default credits before re-programming
+	 * FIXME: should we also set the resend bit here?
+	 */
+	I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE |
+		   default_credits);
+
+	I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE |
+		   credits | PFI_CREDIT_RESEND);
+
+	/*
+	 * FIXME is this guaranteed to clear
+	 * immediately or should we poll for it?
+	 */
+	WARN_ON(I915_READ(GCI_CONTROL) & PFI_CREDIT_RESEND);
+}
+
+static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	int cdclk = cdclk_state->cdclk;
+	u32 val, cmd = cdclk_state->voltage_level;
+	intel_wakeref_t wakeref;
+
+	switch (cdclk) {
+	case 400000:
+	case 333333:
+	case 320000:
+	case 266667:
+	case 200000:
+		break;
+	default:
+		MISSING_CASE(cdclk);
+		return;
+	}
+
+	/* There are cases where we can end up here with power domains
+	 * off and a CDCLK frequency other than the minimum, like when
+	 * issuing a modeset without actually changing any display after
+	 * a system suspend.  So grab the PIPE-A domain, which covers
+	 * the HW blocks needed for the following programming.
+	 */
+	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
+
+	vlv_iosf_sb_get(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) |
+			BIT(VLV_IOSF_SB_BUNIT) |
+			BIT(VLV_IOSF_SB_PUNIT));
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
+	val &= ~DSPFREQGUAR_MASK;
+	val |= (cmd << DSPFREQGUAR_SHIFT);
+	vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, val);
+	if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) &
+		      DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT),
+		     50)) {
+		DRM_ERROR("timed out waiting for CDclk change\n");
+	}
+
+	if (cdclk == 400000) {
+		u32 divider;
+
+		divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1,
+					    cdclk) - 1;
+
+		/* adjust cdclk divider */
+		val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL);
+		val &= ~CCK_FREQUENCY_VALUES;
+		val |= divider;
+		vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val);
+
+		if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) &
+			      CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT),
+			     50))
+			DRM_ERROR("timed out waiting for CDclk change\n");
+	}
+
+	/* adjust self-refresh exit latency value */
+	val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC);
+	val &= ~0x7f;
+
+	/*
+	 * For high bandwidth configs, we set a higher latency in the bunit
+	 * so that the core display fetch happens in time to avoid underruns.
+	 */
+	if (cdclk == 400000)
+		val |= 4500 / 250; /* 4.5 usec */
+	else
+		val |= 3000 / 250; /* 3.0 usec */
+	vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val);
+
+	vlv_iosf_sb_put(dev_priv,
+			BIT(VLV_IOSF_SB_CCK) |
+			BIT(VLV_IOSF_SB_BUNIT) |
+			BIT(VLV_IOSF_SB_PUNIT));
+
+	intel_update_cdclk(dev_priv);
+
+	vlv_program_pfi_credits(dev_priv);
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A, wakeref);
+}
+
+static void chv_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	int cdclk = cdclk_state->cdclk;
+	u32 val, cmd = cdclk_state->voltage_level;
+	intel_wakeref_t wakeref;
+
+	switch (cdclk) {
+	case 333333:
+	case 320000:
+	case 266667:
+	case 200000:
+		break;
+	default:
+		MISSING_CASE(cdclk);
+		return;
+	}
+
+	/* There are cases where we can end up here with power domains
+	 * off and a CDCLK frequency other than the minimum, like when
+	 * issuing a modeset without actually changing any display after
+	 * a system suspend.  So grab the PIPE-A domain, which covers
+	 * the HW blocks needed for the following programming.
+	 */
+	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
+
+	vlv_punit_get(dev_priv);
+	val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
+	val &= ~DSPFREQGUAR_MASK_CHV;
+	val |= (cmd << DSPFREQGUAR_SHIFT_CHV);
+	vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, val);
+	if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) &
+		      DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV),
+		     50)) {
+		DRM_ERROR("timed out waiting for CDclk change\n");
+	}
+
+	vlv_punit_put(dev_priv);
+
+	intel_update_cdclk(dev_priv);
+
+	vlv_program_pfi_credits(dev_priv);
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A, wakeref);
+}
+
+static int bdw_calc_cdclk(int min_cdclk)
+{
+	if (min_cdclk > 540000)
+		return 675000;
+	else if (min_cdclk > 450000)
+		return 540000;
+	else if (min_cdclk > 337500)
+		return 450000;
+	else
+		return 337500;
+}
+
+static u8 bdw_calc_voltage_level(int cdclk)
+{
+	switch (cdclk) {
+	default:
+	case 337500:
+		return 2;
+	case 450000:
+		return 0;
+	case 540000:
+		return 1;
+	case 675000:
+		return 3;
+	}
+}
+
+static void bdw_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	u32 lcpll = I915_READ(LCPLL_CTL);
+	u32 freq = lcpll & LCPLL_CLK_FREQ_MASK;
+
+	if (lcpll & LCPLL_CD_SOURCE_FCLK)
+		cdclk_state->cdclk = 800000;
+	else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+		cdclk_state->cdclk = 450000;
+	else if (freq == LCPLL_CLK_FREQ_450)
+		cdclk_state->cdclk = 450000;
+	else if (freq == LCPLL_CLK_FREQ_54O_BDW)
+		cdclk_state->cdclk = 540000;
+	else if (freq == LCPLL_CLK_FREQ_337_5_BDW)
+		cdclk_state->cdclk = 337500;
+	else
+		cdclk_state->cdclk = 675000;
+
+	/*
+	 * Can't read this out :( Let's assume it's
+	 * at least what the CDCLK frequency requires.
+	 */
+	cdclk_state->voltage_level =
+		bdw_calc_voltage_level(cdclk_state->cdclk);
+}
+
+static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	int cdclk = cdclk_state->cdclk;
+	u32 val;
+	int ret;
+
+	if (WARN((I915_READ(LCPLL_CTL) &
+		  (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK |
+		   LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE |
+		   LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW |
+		   LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK,
+		 "trying to change cdclk frequency with cdclk not enabled\n"))
+		return;
+
+	ret = sandybridge_pcode_write(dev_priv,
+				      BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0);
+	if (ret) {
+		DRM_ERROR("failed to inform pcode about cdclk change\n");
+		return;
+	}
+
+	val = I915_READ(LCPLL_CTL);
+	val |= LCPLL_CD_SOURCE_FCLK;
+	I915_WRITE(LCPLL_CTL, val);
+
+	/*
+	 * According to the spec, it should be enough to poll for this 1 us.
+	 * However, extensive testing shows that this can take longer.
+	 */
+	if (wait_for_us(I915_READ(LCPLL_CTL) &
+			LCPLL_CD_SOURCE_FCLK_DONE, 100))
+		DRM_ERROR("Switching to FCLK failed\n");
+
+	val = I915_READ(LCPLL_CTL);
+	val &= ~LCPLL_CLK_FREQ_MASK;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+		/* fall through */
+	case 337500:
+		val |= LCPLL_CLK_FREQ_337_5_BDW;
+		break;
+	case 450000:
+		val |= LCPLL_CLK_FREQ_450;
+		break;
+	case 540000:
+		val |= LCPLL_CLK_FREQ_54O_BDW;
+		break;
+	case 675000:
+		val |= LCPLL_CLK_FREQ_675_BDW;
+		break;
+	}
+
+	I915_WRITE(LCPLL_CTL, val);
+
+	val = I915_READ(LCPLL_CTL);
+	val &= ~LCPLL_CD_SOURCE_FCLK;
+	I915_WRITE(LCPLL_CTL, val);
+
+	if (wait_for_us((I915_READ(LCPLL_CTL) &
+			LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
+		DRM_ERROR("Switching back to LCPLL failed\n");
+
+	sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
+				cdclk_state->voltage_level);
+
+	I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1);
+
+	intel_update_cdclk(dev_priv);
+}
+
+static int skl_calc_cdclk(int min_cdclk, int vco)
+{
+	if (vco == 8640000) {
+		if (min_cdclk > 540000)
+			return 617143;
+		else if (min_cdclk > 432000)
+			return 540000;
+		else if (min_cdclk > 308571)
+			return 432000;
+		else
+			return 308571;
+	} else {
+		if (min_cdclk > 540000)
+			return 675000;
+		else if (min_cdclk > 450000)
+			return 540000;
+		else if (min_cdclk > 337500)
+			return 450000;
+		else
+			return 337500;
+	}
+}
+
+static u8 skl_calc_voltage_level(int cdclk)
+{
+	if (cdclk > 540000)
+		return 3;
+	else if (cdclk > 450000)
+		return 2;
+	else if (cdclk > 337500)
+		return 1;
+	else
+		return 0;
+}
+
+static void skl_dpll0_update(struct drm_i915_private *dev_priv,
+			     struct intel_cdclk_state *cdclk_state)
+{
+	u32 val;
+
+	cdclk_state->ref = 24000;
+	cdclk_state->vco = 0;
+
+	val = I915_READ(LCPLL1_CTL);
+	if ((val & LCPLL_PLL_ENABLE) == 0)
+		return;
+
+	if (WARN_ON((val & LCPLL_PLL_LOCK) == 0))
+		return;
+
+	val = I915_READ(DPLL_CTRL1);
+
+	if (WARN_ON((val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) |
+			    DPLL_CTRL1_SSC(SKL_DPLL0) |
+			    DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) !=
+		    DPLL_CTRL1_OVERRIDE(SKL_DPLL0)))
+		return;
+
+	switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) {
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0):
+		cdclk_state->vco = 8100000;
+		break;
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0):
+	case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0):
+		cdclk_state->vco = 8640000;
+		break;
+	default:
+		MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0));
+		break;
+	}
+}
+
+static void skl_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	u32 cdctl;
+
+	skl_dpll0_update(dev_priv, cdclk_state);
+
+	cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref;
+
+	if (cdclk_state->vco == 0)
+		goto out;
+
+	cdctl = I915_READ(CDCLK_CTL);
+
+	if (cdclk_state->vco == 8640000) {
+		switch (cdctl & CDCLK_FREQ_SEL_MASK) {
+		case CDCLK_FREQ_450_432:
+			cdclk_state->cdclk = 432000;
+			break;
+		case CDCLK_FREQ_337_308:
+			cdclk_state->cdclk = 308571;
+			break;
+		case CDCLK_FREQ_540:
+			cdclk_state->cdclk = 540000;
+			break;
+		case CDCLK_FREQ_675_617:
+			cdclk_state->cdclk = 617143;
+			break;
+		default:
+			MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK);
+			break;
+		}
+	} else {
+		switch (cdctl & CDCLK_FREQ_SEL_MASK) {
+		case CDCLK_FREQ_450_432:
+			cdclk_state->cdclk = 450000;
+			break;
+		case CDCLK_FREQ_337_308:
+			cdclk_state->cdclk = 337500;
+			break;
+		case CDCLK_FREQ_540:
+			cdclk_state->cdclk = 540000;
+			break;
+		case CDCLK_FREQ_675_617:
+			cdclk_state->cdclk = 675000;
+			break;
+		default:
+			MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK);
+			break;
+		}
+	}
+
+ out:
+	/*
+	 * Can't read this out :( Let's assume it's
+	 * at least what the CDCLK frequency requires.
+	 */
+	cdclk_state->voltage_level =
+		skl_calc_voltage_level(cdclk_state->cdclk);
+}
+
+/* convert from kHz to .1 fixpoint MHz with -1MHz offset */
+static int skl_cdclk_decimal(int cdclk)
+{
+	return DIV_ROUND_CLOSEST(cdclk - 1000, 500);
+}
+
+static void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv,
+					int vco)
+{
+	bool changed = dev_priv->skl_preferred_vco_freq != vco;
+
+	dev_priv->skl_preferred_vco_freq = vco;
+
+	if (changed)
+		intel_update_max_cdclk(dev_priv);
+}
+
+static void skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco)
+{
+	u32 val;
+
+	WARN_ON(vco != 8100000 && vco != 8640000);
+
+	/*
+	 * We always enable DPLL0 with the lowest link rate possible, but still
+	 * taking into account the VCO required to operate the eDP panel at the
+	 * desired frequency. The usual DP link rates operate with a VCO of
+	 * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640.
+	 * The modeset code is responsible for the selection of the exact link
+	 * rate later on, with the constraint of choosing a frequency that
+	 * works with vco.
+	 */
+	val = I915_READ(DPLL_CTRL1);
+
+	val &= ~(DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | DPLL_CTRL1_SSC(SKL_DPLL0) |
+		 DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0));
+	val |= DPLL_CTRL1_OVERRIDE(SKL_DPLL0);
+	if (vco == 8640000)
+		val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080,
+					    SKL_DPLL0);
+	else
+		val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810,
+					    SKL_DPLL0);
+
+	I915_WRITE(DPLL_CTRL1, val);
+	POSTING_READ(DPLL_CTRL1);
+
+	I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) | LCPLL_PLL_ENABLE);
+
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    LCPLL1_CTL, LCPLL_PLL_LOCK, LCPLL_PLL_LOCK,
+				    5))
+		DRM_ERROR("DPLL0 not locked\n");
+
+	dev_priv->cdclk.hw.vco = vco;
+
+	/* We'll want to keep using the current vco from now on. */
+	skl_set_preferred_cdclk_vco(dev_priv, vco);
+}
+
+static void skl_dpll0_disable(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) & ~LCPLL_PLL_ENABLE);
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    LCPLL1_CTL, LCPLL_PLL_LOCK, 0,
+				    1))
+		DRM_ERROR("Couldn't disable DPLL0\n");
+
+	dev_priv->cdclk.hw.vco = 0;
+}
+
+static void skl_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	int cdclk = cdclk_state->cdclk;
+	int vco = cdclk_state->vco;
+	u32 freq_select, cdclk_ctl;
+	int ret;
+
+	/*
+	 * Based on WA#1183 CDCLK rates 308 and 617MHz CDCLK rates are
+	 * unsupported on SKL. In theory this should never happen since only
+	 * the eDP1.4 2.16 and 4.32Gbps rates require it, but eDP1.4 is not
+	 * supported on SKL either, see the above WA. WARN whenever trying to
+	 * use the corresponding VCO freq as that always leads to using the
+	 * minimum 308MHz CDCLK.
+	 */
+	WARN_ON_ONCE(IS_SKYLAKE(dev_priv) && vco == 8640000);
+
+	ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				SKL_CDCLK_PREPARE_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE, 3);
+	if (ret) {
+		DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
+			  ret);
+		return;
+	}
+
+	/* Choose frequency for this cdclk */
+	switch (cdclk) {
+	default:
+		WARN_ON(cdclk != dev_priv->cdclk.hw.bypass);
+		WARN_ON(vco != 0);
+		/* fall through */
+	case 308571:
+	case 337500:
+		freq_select = CDCLK_FREQ_337_308;
+		break;
+	case 450000:
+	case 432000:
+		freq_select = CDCLK_FREQ_450_432;
+		break;
+	case 540000:
+		freq_select = CDCLK_FREQ_540;
+		break;
+	case 617143:
+	case 675000:
+		freq_select = CDCLK_FREQ_675_617;
+		break;
+	}
+
+	if (dev_priv->cdclk.hw.vco != 0 &&
+	    dev_priv->cdclk.hw.vco != vco)
+		skl_dpll0_disable(dev_priv);
+
+	cdclk_ctl = I915_READ(CDCLK_CTL);
+
+	if (dev_priv->cdclk.hw.vco != vco) {
+		/* Wa Display #1183: skl,kbl,cfl */
+		cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK);
+		cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk);
+		I915_WRITE(CDCLK_CTL, cdclk_ctl);
+	}
+
+	/* Wa Display #1183: skl,kbl,cfl */
+	cdclk_ctl |= CDCLK_DIVMUX_CD_OVERRIDE;
+	I915_WRITE(CDCLK_CTL, cdclk_ctl);
+	POSTING_READ(CDCLK_CTL);
+
+	if (dev_priv->cdclk.hw.vco != vco)
+		skl_dpll0_enable(dev_priv, vco);
+
+	/* Wa Display #1183: skl,kbl,cfl */
+	cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK);
+	I915_WRITE(CDCLK_CTL, cdclk_ctl);
+
+	cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk);
+	I915_WRITE(CDCLK_CTL, cdclk_ctl);
+
+	/* Wa Display #1183: skl,kbl,cfl */
+	cdclk_ctl &= ~CDCLK_DIVMUX_CD_OVERRIDE;
+	I915_WRITE(CDCLK_CTL, cdclk_ctl);
+	POSTING_READ(CDCLK_CTL);
+
+	/* inform PCU of the change */
+	sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				cdclk_state->voltage_level);
+
+	intel_update_cdclk(dev_priv);
+}
+
+static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 cdctl, expected;
+
+	/*
+	 * check if the pre-os initialized the display
+	 * There is SWF18 scratchpad register defined which is set by the
+	 * pre-os which can be used by the OS drivers to check the status
+	 */
+	if ((I915_READ(SWF_ILK(0x18)) & 0x00FFFFFF) == 0)
+		goto sanitize;
+
+	intel_update_cdclk(dev_priv);
+	intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+
+	/* Is PLL enabled and locked ? */
+	if (dev_priv->cdclk.hw.vco == 0 ||
+	    dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass)
+		goto sanitize;
+
+	/* DPLL okay; verify the cdclock
+	 *
+	 * Noticed in some instances that the freq selection is correct but
+	 * decimal part is programmed wrong from BIOS where pre-os does not
+	 * enable display. Verify the same as well.
+	 */
+	cdctl = I915_READ(CDCLK_CTL);
+	expected = (cdctl & CDCLK_FREQ_SEL_MASK) |
+		skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk);
+	if (cdctl == expected)
+		/* All well; nothing to sanitize */
+		return;
+
+sanitize:
+	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+
+	/* force cdclk programming */
+	dev_priv->cdclk.hw.cdclk = 0;
+	/* force full PLL disable + enable */
+	dev_priv->cdclk.hw.vco = -1;
+}
+
+static void skl_init_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state;
+
+	skl_sanitize_cdclk(dev_priv);
+
+	if (dev_priv->cdclk.hw.cdclk != 0 &&
+	    dev_priv->cdclk.hw.vco != 0) {
+		/*
+		 * Use the current vco as our initial
+		 * guess as to what the preferred vco is.
+		 */
+		if (dev_priv->skl_preferred_vco_freq == 0)
+			skl_set_preferred_cdclk_vco(dev_priv,
+						    dev_priv->cdclk.hw.vco);
+		return;
+	}
+
+	cdclk_state = dev_priv->cdclk.hw;
+
+	cdclk_state.vco = dev_priv->skl_preferred_vco_freq;
+	if (cdclk_state.vco == 0)
+		cdclk_state.vco = 8100000;
+	cdclk_state.cdclk = skl_calc_cdclk(0, cdclk_state.vco);
+	cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk);
+
+	skl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+static void skl_uninit_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw;
+
+	cdclk_state.cdclk = cdclk_state.bypass;
+	cdclk_state.vco = 0;
+	cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk);
+
+	skl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+static int bxt_calc_cdclk(int min_cdclk)
+{
+	if (min_cdclk > 576000)
+		return 624000;
+	else if (min_cdclk > 384000)
+		return 576000;
+	else if (min_cdclk > 288000)
+		return 384000;
+	else if (min_cdclk > 144000)
+		return 288000;
+	else
+		return 144000;
+}
+
+static int glk_calc_cdclk(int min_cdclk)
+{
+	if (min_cdclk > 158400)
+		return 316800;
+	else if (min_cdclk > 79200)
+		return 158400;
+	else
+		return 79200;
+}
+
+static u8 bxt_calc_voltage_level(int cdclk)
+{
+	return DIV_ROUND_UP(cdclk, 25000);
+}
+
+static int bxt_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+	int ratio;
+
+	if (cdclk == dev_priv->cdclk.hw.bypass)
+		return 0;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+		/* fall through */
+	case 144000:
+	case 288000:
+	case 384000:
+	case 576000:
+		ratio = 60;
+		break;
+	case 624000:
+		ratio = 65;
+		break;
+	}
+
+	return dev_priv->cdclk.hw.ref * ratio;
+}
+
+static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+	int ratio;
+
+	if (cdclk == dev_priv->cdclk.hw.bypass)
+		return 0;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+		/* fall through */
+	case  79200:
+	case 158400:
+	case 316800:
+		ratio = 33;
+		break;
+	}
+
+	return dev_priv->cdclk.hw.ref * ratio;
+}
+
+static void bxt_de_pll_update(struct drm_i915_private *dev_priv,
+			      struct intel_cdclk_state *cdclk_state)
+{
+	u32 val;
+
+	cdclk_state->ref = 19200;
+	cdclk_state->vco = 0;
+
+	val = I915_READ(BXT_DE_PLL_ENABLE);
+	if ((val & BXT_DE_PLL_PLL_ENABLE) == 0)
+		return;
+
+	if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0))
+		return;
+
+	val = I915_READ(BXT_DE_PLL_CTL);
+	cdclk_state->vco = (val & BXT_DE_PLL_RATIO_MASK) * cdclk_state->ref;
+}
+
+static void bxt_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	u32 divider;
+	int div;
+
+	bxt_de_pll_update(dev_priv, cdclk_state);
+
+	cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref;
+
+	if (cdclk_state->vco == 0)
+		goto out;
+
+	divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK;
+
+	switch (divider) {
+	case BXT_CDCLK_CD2X_DIV_SEL_1:
+		div = 2;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_1_5:
+		WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
+		div = 3;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_2:
+		div = 4;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_4:
+		div = 8;
+		break;
+	default:
+		MISSING_CASE(divider);
+		return;
+	}
+
+	cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, div);
+
+ out:
+	/*
+	 * Can't read this out :( Let's assume it's
+	 * at least what the CDCLK frequency requires.
+	 */
+	cdclk_state->voltage_level =
+		bxt_calc_voltage_level(cdclk_state->cdclk);
+}
+
+static void bxt_de_pll_disable(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(BXT_DE_PLL_ENABLE, 0);
+
+	/* Timeout 200us */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 0,
+				    1))
+		DRM_ERROR("timeout waiting for DE PLL unlock\n");
+
+	dev_priv->cdclk.hw.vco = 0;
+}
+
+static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco)
+{
+	int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref);
+	u32 val;
+
+	val = I915_READ(BXT_DE_PLL_CTL);
+	val &= ~BXT_DE_PLL_RATIO_MASK;
+	val |= BXT_DE_PLL_RATIO(ratio);
+	I915_WRITE(BXT_DE_PLL_CTL, val);
+
+	I915_WRITE(BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE);
+
+	/* Timeout 200us */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    BXT_DE_PLL_ENABLE,
+				    BXT_DE_PLL_LOCK,
+				    BXT_DE_PLL_LOCK,
+				    1))
+		DRM_ERROR("timeout waiting for DE PLL lock\n");
+
+	dev_priv->cdclk.hw.vco = vco;
+}
+
+static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	int cdclk = cdclk_state->cdclk;
+	int vco = cdclk_state->vco;
+	u32 val, divider;
+	int ret;
+
+	/* cdclk = vco / 2 / div{1,1.5,2,4} */
+	switch (DIV_ROUND_CLOSEST(vco, cdclk)) {
+	default:
+		WARN_ON(cdclk != dev_priv->cdclk.hw.bypass);
+		WARN_ON(vco != 0);
+		/* fall through */
+	case 2:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
+		break;
+	case 3:
+		WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n");
+		divider = BXT_CDCLK_CD2X_DIV_SEL_1_5;
+		break;
+	case 4:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_2;
+		break;
+	case 8:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_4;
+		break;
+	}
+
+	/*
+	 * Inform power controller of upcoming frequency change. BSpec
+	 * requires us to wait up to 150usec, but that leads to timeouts;
+	 * the 2ms used here is based on experiment.
+	 */
+	ret = sandybridge_pcode_write_timeout(dev_priv,
+					      HSW_PCODE_DE_WRITE_FREQ_REQ,
+					      0x80000000, 150, 2);
+	if (ret) {
+		DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n",
+			  ret, cdclk);
+		return;
+	}
+
+	if (dev_priv->cdclk.hw.vco != 0 &&
+	    dev_priv->cdclk.hw.vco != vco)
+		bxt_de_pll_disable(dev_priv);
+
+	if (dev_priv->cdclk.hw.vco != vco)
+		bxt_de_pll_enable(dev_priv, vco);
+
+	val = divider | skl_cdclk_decimal(cdclk);
+	if (pipe == INVALID_PIPE)
+		val |= BXT_CDCLK_CD2X_PIPE_NONE;
+	else
+		val |= BXT_CDCLK_CD2X_PIPE(pipe);
+	/*
+	 * Disable SSA Precharge when CD clock frequency < 500 MHz,
+	 * enable otherwise.
+	 */
+	if (cdclk >= 500000)
+		val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
+	I915_WRITE(CDCLK_CTL, val);
+
+	if (pipe != INVALID_PIPE)
+		intel_wait_for_vblank(dev_priv, pipe);
+
+	/*
+	 * The timeout isn't specified, the 2ms used here is based on
+	 * experiment.
+	 * FIXME: Waiting for the request completion could be delayed until
+	 * the next PCODE request based on BSpec.
+	 */
+	ret = sandybridge_pcode_write_timeout(dev_priv,
+					      HSW_PCODE_DE_WRITE_FREQ_REQ,
+					      cdclk_state->voltage_level, 150, 2);
+	if (ret) {
+		DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n",
+			  ret, cdclk);
+		return;
+	}
+
+	intel_update_cdclk(dev_priv);
+}
+
+static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 cdctl, expected;
+
+	intel_update_cdclk(dev_priv);
+	intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+
+	if (dev_priv->cdclk.hw.vco == 0 ||
+	    dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass)
+		goto sanitize;
+
+	/* DPLL okay; verify the cdclock
+	 *
+	 * Some BIOS versions leave an incorrect decimal frequency value and
+	 * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4,
+	 * so sanitize this register.
+	 */
+	cdctl = I915_READ(CDCLK_CTL);
+	/*
+	 * Let's ignore the pipe field, since BIOS could have configured the
+	 * dividers both synching to an active pipe, or asynchronously
+	 * (PIPE_NONE).
+	 */
+	cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE;
+
+	expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) |
+		skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk);
+	/*
+	 * Disable SSA Precharge when CD clock frequency < 500 MHz,
+	 * enable otherwise.
+	 */
+	if (dev_priv->cdclk.hw.cdclk >= 500000)
+		expected |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
+
+	if (cdctl == expected)
+		/* All well; nothing to sanitize */
+		return;
+
+sanitize:
+	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+
+	/* force cdclk programming */
+	dev_priv->cdclk.hw.cdclk = 0;
+
+	/* force full PLL disable + enable */
+	dev_priv->cdclk.hw.vco = -1;
+}
+
+static void bxt_init_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state;
+
+	bxt_sanitize_cdclk(dev_priv);
+
+	if (dev_priv->cdclk.hw.cdclk != 0 &&
+	    dev_priv->cdclk.hw.vco != 0)
+		return;
+
+	cdclk_state = dev_priv->cdclk.hw;
+
+	/*
+	 * FIXME:
+	 * - The initial CDCLK needs to be read from VBT.
+	 *   Need to make this change after VBT has changes for BXT.
+	 */
+	if (IS_GEMINILAKE(dev_priv)) {
+		cdclk_state.cdclk = glk_calc_cdclk(0);
+		cdclk_state.vco = glk_de_pll_vco(dev_priv, cdclk_state.cdclk);
+	} else {
+		cdclk_state.cdclk = bxt_calc_cdclk(0);
+		cdclk_state.vco = bxt_de_pll_vco(dev_priv, cdclk_state.cdclk);
+	}
+	cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk);
+
+	bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+static void bxt_uninit_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw;
+
+	cdclk_state.cdclk = cdclk_state.bypass;
+	cdclk_state.vco = 0;
+	cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk);
+
+	bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+static int cnl_calc_cdclk(int min_cdclk)
+{
+	if (min_cdclk > 336000)
+		return 528000;
+	else if (min_cdclk > 168000)
+		return 336000;
+	else
+		return 168000;
+}
+
+static u8 cnl_calc_voltage_level(int cdclk)
+{
+	if (cdclk > 336000)
+		return 2;
+	else if (cdclk > 168000)
+		return 1;
+	else
+		return 0;
+}
+
+static void cnl_cdclk_pll_update(struct drm_i915_private *dev_priv,
+				 struct intel_cdclk_state *cdclk_state)
+{
+	u32 val;
+
+	if (I915_READ(SKL_DSSM) & CNL_DSSM_CDCLK_PLL_REFCLK_24MHz)
+		cdclk_state->ref = 24000;
+	else
+		cdclk_state->ref = 19200;
+
+	cdclk_state->vco = 0;
+
+	val = I915_READ(BXT_DE_PLL_ENABLE);
+	if ((val & BXT_DE_PLL_PLL_ENABLE) == 0)
+		return;
+
+	if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0))
+		return;
+
+	cdclk_state->vco = (val & CNL_CDCLK_PLL_RATIO_MASK) * cdclk_state->ref;
+}
+
+static void cnl_get_cdclk(struct drm_i915_private *dev_priv,
+			 struct intel_cdclk_state *cdclk_state)
+{
+	u32 divider;
+	int div;
+
+	cnl_cdclk_pll_update(dev_priv, cdclk_state);
+
+	cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref;
+
+	if (cdclk_state->vco == 0)
+		goto out;
+
+	divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK;
+
+	switch (divider) {
+	case BXT_CDCLK_CD2X_DIV_SEL_1:
+		div = 2;
+		break;
+	case BXT_CDCLK_CD2X_DIV_SEL_2:
+		div = 4;
+		break;
+	default:
+		MISSING_CASE(divider);
+		return;
+	}
+
+	cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, div);
+
+ out:
+	/*
+	 * Can't read this out :( Let's assume it's
+	 * at least what the CDCLK frequency requires.
+	 */
+	cdclk_state->voltage_level =
+		cnl_calc_voltage_level(cdclk_state->cdclk);
+}
+
+static void cnl_cdclk_pll_disable(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = I915_READ(BXT_DE_PLL_ENABLE);
+	val &= ~BXT_DE_PLL_PLL_ENABLE;
+	I915_WRITE(BXT_DE_PLL_ENABLE, val);
+
+	/* Timeout 200us */
+	if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) == 0, 1))
+		DRM_ERROR("timeout waiting for CDCLK PLL unlock\n");
+
+	dev_priv->cdclk.hw.vco = 0;
+}
+
+static void cnl_cdclk_pll_enable(struct drm_i915_private *dev_priv, int vco)
+{
+	int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref);
+	u32 val;
+
+	val = CNL_CDCLK_PLL_RATIO(ratio);
+	I915_WRITE(BXT_DE_PLL_ENABLE, val);
+
+	val |= BXT_DE_PLL_PLL_ENABLE;
+	I915_WRITE(BXT_DE_PLL_ENABLE, val);
+
+	/* Timeout 200us */
+	if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) != 0, 1))
+		DRM_ERROR("timeout waiting for CDCLK PLL lock\n");
+
+	dev_priv->cdclk.hw.vco = vco;
+}
+
+static void cnl_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	int cdclk = cdclk_state->cdclk;
+	int vco = cdclk_state->vco;
+	u32 val, divider;
+	int ret;
+
+	ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				SKL_CDCLK_PREPARE_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE, 3);
+	if (ret) {
+		DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
+			  ret);
+		return;
+	}
+
+	/* cdclk = vco / 2 / div{1,2} */
+	switch (DIV_ROUND_CLOSEST(vco, cdclk)) {
+	default:
+		WARN_ON(cdclk != dev_priv->cdclk.hw.bypass);
+		WARN_ON(vco != 0);
+		/* fall through */
+	case 2:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
+		break;
+	case 4:
+		divider = BXT_CDCLK_CD2X_DIV_SEL_2;
+		break;
+	}
+
+	if (dev_priv->cdclk.hw.vco != 0 &&
+	    dev_priv->cdclk.hw.vco != vco)
+		cnl_cdclk_pll_disable(dev_priv);
+
+	if (dev_priv->cdclk.hw.vco != vco)
+		cnl_cdclk_pll_enable(dev_priv, vco);
+
+	val = divider | skl_cdclk_decimal(cdclk);
+	if (pipe == INVALID_PIPE)
+		val |= BXT_CDCLK_CD2X_PIPE_NONE;
+	else
+		val |= BXT_CDCLK_CD2X_PIPE(pipe);
+	I915_WRITE(CDCLK_CTL, val);
+
+	if (pipe != INVALID_PIPE)
+		intel_wait_for_vblank(dev_priv, pipe);
+
+	/* inform PCU of the change */
+	sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				cdclk_state->voltage_level);
+
+	intel_update_cdclk(dev_priv);
+
+	/*
+	 * Can't read out the voltage level :(
+	 * Let's just assume everything is as expected.
+	 */
+	dev_priv->cdclk.hw.voltage_level = cdclk_state->voltage_level;
+}
+
+static int cnl_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+	int ratio;
+
+	if (cdclk == dev_priv->cdclk.hw.bypass)
+		return 0;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+		/* fall through */
+	case 168000:
+	case 336000:
+		ratio = dev_priv->cdclk.hw.ref == 19200 ? 35 : 28;
+		break;
+	case 528000:
+		ratio = dev_priv->cdclk.hw.ref == 19200 ? 55 : 44;
+		break;
+	}
+
+	return dev_priv->cdclk.hw.ref * ratio;
+}
+
+static void cnl_sanitize_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 cdctl, expected;
+
+	intel_update_cdclk(dev_priv);
+	intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+
+	if (dev_priv->cdclk.hw.vco == 0 ||
+	    dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass)
+		goto sanitize;
+
+	/* DPLL okay; verify the cdclock
+	 *
+	 * Some BIOS versions leave an incorrect decimal frequency value and
+	 * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4,
+	 * so sanitize this register.
+	 */
+	cdctl = I915_READ(CDCLK_CTL);
+	/*
+	 * Let's ignore the pipe field, since BIOS could have configured the
+	 * dividers both synching to an active pipe, or asynchronously
+	 * (PIPE_NONE).
+	 */
+	cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE;
+
+	expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) |
+		   skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk);
+
+	if (cdctl == expected)
+		/* All well; nothing to sanitize */
+		return;
+
+sanitize:
+	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+
+	/* force cdclk programming */
+	dev_priv->cdclk.hw.cdclk = 0;
+
+	/* force full PLL disable + enable */
+	dev_priv->cdclk.hw.vco = -1;
+}
+
+static int icl_calc_cdclk(int min_cdclk, unsigned int ref)
+{
+	int ranges_24[] = { 312000, 552000, 648000 };
+	int ranges_19_38[] = { 307200, 556800, 652800 };
+	int *ranges;
+
+	switch (ref) {
+	default:
+		MISSING_CASE(ref);
+		/* fall through */
+	case 24000:
+		ranges = ranges_24;
+		break;
+	case 19200:
+	case 38400:
+		ranges = ranges_19_38;
+		break;
+	}
+
+	if (min_cdclk > ranges[1])
+		return ranges[2];
+	else if (min_cdclk > ranges[0])
+		return ranges[1];
+	else
+		return ranges[0];
+}
+
+static int icl_calc_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk)
+{
+	int ratio;
+
+	if (cdclk == dev_priv->cdclk.hw.bypass)
+		return 0;
+
+	switch (cdclk) {
+	default:
+		MISSING_CASE(cdclk);
+		/* fall through */
+	case 307200:
+	case 556800:
+	case 652800:
+		WARN_ON(dev_priv->cdclk.hw.ref != 19200 &&
+			dev_priv->cdclk.hw.ref != 38400);
+		break;
+	case 312000:
+	case 552000:
+	case 648000:
+		WARN_ON(dev_priv->cdclk.hw.ref != 24000);
+	}
+
+	ratio = cdclk / (dev_priv->cdclk.hw.ref / 2);
+
+	return dev_priv->cdclk.hw.ref * ratio;
+}
+
+static void icl_set_cdclk(struct drm_i915_private *dev_priv,
+			  const struct intel_cdclk_state *cdclk_state,
+			  enum pipe pipe)
+{
+	unsigned int cdclk = cdclk_state->cdclk;
+	unsigned int vco = cdclk_state->vco;
+	int ret;
+
+	ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				SKL_CDCLK_PREPARE_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE,
+				SKL_CDCLK_READY_FOR_CHANGE, 3);
+	if (ret) {
+		DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
+			  ret);
+		return;
+	}
+
+	if (dev_priv->cdclk.hw.vco != 0 &&
+	    dev_priv->cdclk.hw.vco != vco)
+		cnl_cdclk_pll_disable(dev_priv);
+
+	if (dev_priv->cdclk.hw.vco != vco)
+		cnl_cdclk_pll_enable(dev_priv, vco);
+
+	/*
+	 * On ICL CD2X_DIV can only be 1, so we'll never end up changing the
+	 * divider here synchronized to a pipe while CDCLK is on, nor will we
+	 * need the corresponding vblank wait.
+	 */
+	I915_WRITE(CDCLK_CTL, ICL_CDCLK_CD2X_PIPE_NONE |
+			      skl_cdclk_decimal(cdclk));
+
+	sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
+				cdclk_state->voltage_level);
+
+	intel_update_cdclk(dev_priv);
+
+	/*
+	 * Can't read out the voltage level :(
+	 * Let's just assume everything is as expected.
+	 */
+	dev_priv->cdclk.hw.voltage_level = cdclk_state->voltage_level;
+}
+
+static u8 icl_calc_voltage_level(int cdclk)
+{
+	if (cdclk > 556800)
+		return 2;
+	else if (cdclk > 312000)
+		return 1;
+	else
+		return 0;
+}
+
+static void icl_get_cdclk(struct drm_i915_private *dev_priv,
+			  struct intel_cdclk_state *cdclk_state)
+{
+	u32 val;
+
+	cdclk_state->bypass = 50000;
+
+	val = I915_READ(SKL_DSSM);
+	switch (val & ICL_DSSM_CDCLK_PLL_REFCLK_MASK) {
+	default:
+		MISSING_CASE(val);
+		/* fall through */
+	case ICL_DSSM_CDCLK_PLL_REFCLK_24MHz:
+		cdclk_state->ref = 24000;
+		break;
+	case ICL_DSSM_CDCLK_PLL_REFCLK_19_2MHz:
+		cdclk_state->ref = 19200;
+		break;
+	case ICL_DSSM_CDCLK_PLL_REFCLK_38_4MHz:
+		cdclk_state->ref = 38400;
+		break;
+	}
+
+	val = I915_READ(BXT_DE_PLL_ENABLE);
+	if ((val & BXT_DE_PLL_PLL_ENABLE) == 0 ||
+	    (val & BXT_DE_PLL_LOCK) == 0) {
+		/*
+		 * CDCLK PLL is disabled, the VCO/ratio doesn't matter, but
+		 * setting it to zero is a way to signal that.
+		 */
+		cdclk_state->vco = 0;
+		cdclk_state->cdclk = cdclk_state->bypass;
+		goto out;
+	}
+
+	cdclk_state->vco = (val & BXT_DE_PLL_RATIO_MASK) * cdclk_state->ref;
+
+	val = I915_READ(CDCLK_CTL);
+	WARN_ON((val & BXT_CDCLK_CD2X_DIV_SEL_MASK) != 0);
+
+	cdclk_state->cdclk = cdclk_state->vco / 2;
+
+out:
+	/*
+	 * Can't read this out :( Let's assume it's
+	 * at least what the CDCLK frequency requires.
+	 */
+	cdclk_state->voltage_level =
+		icl_calc_voltage_level(cdclk_state->cdclk);
+}
+
+static void icl_init_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state sanitized_state;
+	u32 val;
+
+	/* This sets dev_priv->cdclk.hw. */
+	intel_update_cdclk(dev_priv);
+	intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+
+	/* This means CDCLK disabled. */
+	if (dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass)
+		goto sanitize;
+
+	val = I915_READ(CDCLK_CTL);
+
+	if ((val & BXT_CDCLK_CD2X_DIV_SEL_MASK) != 0)
+		goto sanitize;
+
+	if ((val & CDCLK_FREQ_DECIMAL_MASK) !=
+	    skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk))
+		goto sanitize;
+
+	return;
+
+sanitize:
+	DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n");
+
+	sanitized_state.ref = dev_priv->cdclk.hw.ref;
+	sanitized_state.cdclk = icl_calc_cdclk(0, sanitized_state.ref);
+	sanitized_state.vco = icl_calc_cdclk_pll_vco(dev_priv,
+						     sanitized_state.cdclk);
+	sanitized_state.voltage_level =
+				icl_calc_voltage_level(sanitized_state.cdclk);
+
+	icl_set_cdclk(dev_priv, &sanitized_state, INVALID_PIPE);
+}
+
+static void icl_uninit_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw;
+
+	cdclk_state.cdclk = cdclk_state.bypass;
+	cdclk_state.vco = 0;
+	cdclk_state.voltage_level = icl_calc_voltage_level(cdclk_state.cdclk);
+
+	icl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+static void cnl_init_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state;
+
+	cnl_sanitize_cdclk(dev_priv);
+
+	if (dev_priv->cdclk.hw.cdclk != 0 &&
+	    dev_priv->cdclk.hw.vco != 0)
+		return;
+
+	cdclk_state = dev_priv->cdclk.hw;
+
+	cdclk_state.cdclk = cnl_calc_cdclk(0);
+	cdclk_state.vco = cnl_cdclk_pll_vco(dev_priv, cdclk_state.cdclk);
+	cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk);
+
+	cnl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+static void cnl_uninit_cdclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw;
+
+	cdclk_state.cdclk = cdclk_state.bypass;
+	cdclk_state.vco = 0;
+	cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk);
+
+	cnl_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
+}
+
+/**
+ * intel_cdclk_init - Initialize CDCLK
+ * @i915: i915 device
+ *
+ * Initialize CDCLK. This consists mainly of initializing dev_priv->cdclk.hw and
+ * sanitizing the state of the hardware if needed. This is generally done only
+ * during the display core initialization sequence, after which the DMC will
+ * take care of turning CDCLK off/on as needed.
+ */
+void intel_cdclk_init(struct drm_i915_private *i915)
+{
+	if (INTEL_GEN(i915) >= 11)
+		icl_init_cdclk(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_init_cdclk(i915);
+	else if (IS_GEN9_BC(i915))
+		skl_init_cdclk(i915);
+	else if (IS_GEN9_LP(i915))
+		bxt_init_cdclk(i915);
+}
+
+/**
+ * intel_cdclk_uninit - Uninitialize CDCLK
+ * @i915: i915 device
+ *
+ * Uninitialize CDCLK. This is done only during the display core
+ * uninitialization sequence.
+ */
+void intel_cdclk_uninit(struct drm_i915_private *i915)
+{
+	if (INTEL_GEN(i915) >= 11)
+		icl_uninit_cdclk(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_uninit_cdclk(i915);
+	else if (IS_GEN9_BC(i915))
+		skl_uninit_cdclk(i915);
+	else if (IS_GEN9_LP(i915))
+		bxt_uninit_cdclk(i915);
+}
+
+/**
+ * intel_cdclk_needs_modeset - Determine if two CDCLK states require a modeset on all pipes
+ * @a: first CDCLK state
+ * @b: second CDCLK state
+ *
+ * Returns:
+ * True if the CDCLK states require pipes to be off during reprogramming, false if not.
+ */
+bool intel_cdclk_needs_modeset(const struct intel_cdclk_state *a,
+			       const struct intel_cdclk_state *b)
+{
+	return a->cdclk != b->cdclk ||
+		a->vco != b->vco ||
+		a->ref != b->ref;
+}
+
+/**
+ * intel_cdclk_needs_cd2x_update - Determine if two CDCLK states require a cd2x divider update
+ * @dev_priv: Not a CDCLK state, it's the drm_i915_private!
+ * @a: first CDCLK state
+ * @b: second CDCLK state
+ *
+ * Returns:
+ * True if the CDCLK states require just a cd2x divider update, false if not.
+ */
+bool intel_cdclk_needs_cd2x_update(struct drm_i915_private *dev_priv,
+				   const struct intel_cdclk_state *a,
+				   const struct intel_cdclk_state *b)
+{
+	/* Older hw doesn't have the capability */
+	if (INTEL_GEN(dev_priv) < 10 && !IS_GEN9_LP(dev_priv))
+		return false;
+
+	return a->cdclk != b->cdclk &&
+		a->vco == b->vco &&
+		a->ref == b->ref;
+}
+
+/**
+ * intel_cdclk_changed - Determine if two CDCLK states are different
+ * @a: first CDCLK state
+ * @b: second CDCLK state
+ *
+ * Returns:
+ * True if the CDCLK states don't match, false if they do.
+ */
+bool intel_cdclk_changed(const struct intel_cdclk_state *a,
+			 const struct intel_cdclk_state *b)
+{
+	return intel_cdclk_needs_modeset(a, b) ||
+		a->voltage_level != b->voltage_level;
+}
+
+/**
+ * intel_cdclk_swap_state - make atomic CDCLK configuration effective
+ * @state: atomic state
+ *
+ * This is the CDCLK version of drm_atomic_helper_swap_state() since the
+ * helper does not handle driver-specific global state.
+ *
+ * Similarly to the atomic helpers this function does a complete swap,
+ * i.e. it also puts the old state into @state. This is used by the commit
+ * code to determine how CDCLK has changed (for instance did it increase or
+ * decrease).
+ */
+void intel_cdclk_swap_state(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+
+	swap(state->cdclk.logical, dev_priv->cdclk.logical);
+	swap(state->cdclk.actual, dev_priv->cdclk.actual);
+}
+
+void intel_dump_cdclk_state(const struct intel_cdclk_state *cdclk_state,
+			    const char *context)
+{
+	DRM_DEBUG_DRIVER("%s %d kHz, VCO %d kHz, ref %d kHz, bypass %d kHz, voltage level %d\n",
+			 context, cdclk_state->cdclk, cdclk_state->vco,
+			 cdclk_state->ref, cdclk_state->bypass,
+			 cdclk_state->voltage_level);
+}
+
+/**
+ * intel_set_cdclk - Push the CDCLK state to the hardware
+ * @dev_priv: i915 device
+ * @cdclk_state: new CDCLK state
+ * @pipe: pipe with which to synchronize the update
+ *
+ * Program the hardware based on the passed in CDCLK state,
+ * if necessary.
+ */
+static void intel_set_cdclk(struct drm_i915_private *dev_priv,
+			    const struct intel_cdclk_state *cdclk_state,
+			    enum pipe pipe)
+{
+	if (!intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_state))
+		return;
+
+	if (WARN_ON_ONCE(!dev_priv->display.set_cdclk))
+		return;
+
+	intel_dump_cdclk_state(cdclk_state, "Changing CDCLK to");
+
+	dev_priv->display.set_cdclk(dev_priv, cdclk_state, pipe);
+
+	if (WARN(intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_state),
+		 "cdclk state doesn't match!\n")) {
+		intel_dump_cdclk_state(&dev_priv->cdclk.hw, "[hw state]");
+		intel_dump_cdclk_state(cdclk_state, "[sw state]");
+	}
+}
+
+/**
+ * intel_set_cdclk_pre_plane_update - Push the CDCLK state to the hardware
+ * @dev_priv: i915 device
+ * @old_state: old CDCLK state
+ * @new_state: new CDCLK state
+ * @pipe: pipe with which to synchronize the update
+ *
+ * Program the hardware before updating the HW plane state based on the passed
+ * in CDCLK state, if necessary.
+ */
+void
+intel_set_cdclk_pre_plane_update(struct drm_i915_private *dev_priv,
+				 const struct intel_cdclk_state *old_state,
+				 const struct intel_cdclk_state *new_state,
+				 enum pipe pipe)
+{
+	if (pipe == INVALID_PIPE || old_state->cdclk <= new_state->cdclk)
+		intel_set_cdclk(dev_priv, new_state, pipe);
+}
+
+/**
+ * intel_set_cdclk_post_plane_update - Push the CDCLK state to the hardware
+ * @dev_priv: i915 device
+ * @old_state: old CDCLK state
+ * @new_state: new CDCLK state
+ * @pipe: pipe with which to synchronize the update
+ *
+ * Program the hardware after updating the HW plane state based on the passed
+ * in CDCLK state, if necessary.
+ */
+void
+intel_set_cdclk_post_plane_update(struct drm_i915_private *dev_priv,
+				  const struct intel_cdclk_state *old_state,
+				  const struct intel_cdclk_state *new_state,
+				  enum pipe pipe)
+{
+	if (pipe != INVALID_PIPE && old_state->cdclk > new_state->cdclk)
+		intel_set_cdclk(dev_priv, new_state, pipe);
+}
+
+static int intel_pixel_rate_to_cdclk(struct drm_i915_private *dev_priv,
+				     int pixel_rate)
+{
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		return DIV_ROUND_UP(pixel_rate, 2);
+	else if (IS_GEN(dev_priv, 9) ||
+		 IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+		return pixel_rate;
+	else if (IS_CHERRYVIEW(dev_priv))
+		return DIV_ROUND_UP(pixel_rate * 100, 95);
+	else
+		return DIV_ROUND_UP(pixel_rate * 100, 90);
+}
+
+int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(crtc_state->base.crtc->dev);
+	int min_cdclk;
+
+	if (!crtc_state->base.enable)
+		return 0;
+
+	min_cdclk = intel_pixel_rate_to_cdclk(dev_priv, crtc_state->pixel_rate);
+
+	/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
+	if (IS_BROADWELL(dev_priv) && hsw_crtc_state_ips_capable(crtc_state))
+		min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95);
+
+	/* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz,
+	 * audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else
+	 * there may be audio corruption or screen corruption." This cdclk
+	 * restriction for GLK is 316.8 MHz.
+	 */
+	if (intel_crtc_has_dp_encoder(crtc_state) &&
+	    crtc_state->has_audio &&
+	    crtc_state->port_clock >= 540000 &&
+	    crtc_state->lane_count == 4) {
+		if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
+			/* Display WA #1145: glk,cnl */
+			min_cdclk = max(316800, min_cdclk);
+		} else if (IS_GEN(dev_priv, 9) || IS_BROADWELL(dev_priv)) {
+			/* Display WA #1144: skl,bxt */
+			min_cdclk = max(432000, min_cdclk);
+		}
+	}
+
+	/*
+	 * According to BSpec, "The CD clock frequency must be at least twice
+	 * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default.
+	 */
+	if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9)
+		min_cdclk = max(2 * 96000, min_cdclk);
+
+	/*
+	 * On Valleyview some DSI panels lose (v|h)sync when the clock is lower
+	 * than 320000KHz.
+	 */
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) &&
+	    IS_VALLEYVIEW(dev_priv))
+		min_cdclk = max(320000, min_cdclk);
+
+	/*
+	 * On Geminilake once the CDCLK gets as low as 79200
+	 * picture gets unstable, despite that values are
+	 * correct for DSI PLL and DE PLL.
+	 */
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) &&
+	    IS_GEMINILAKE(dev_priv))
+		min_cdclk = max(158400, min_cdclk);
+
+	if (min_cdclk > dev_priv->max_cdclk_freq) {
+		DRM_DEBUG_KMS("required cdclk (%d kHz) exceeds max (%d kHz)\n",
+			      min_cdclk, dev_priv->max_cdclk_freq);
+		return -EINVAL;
+	}
+
+	return min_cdclk;
+}
+
+static int intel_compute_min_cdclk(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc *crtc;
+	struct intel_crtc_state *crtc_state;
+	int min_cdclk, i;
+	enum pipe pipe;
+
+	memcpy(state->min_cdclk, dev_priv->min_cdclk,
+	       sizeof(state->min_cdclk));
+
+	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+		min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
+		if (min_cdclk < 0)
+			return min_cdclk;
+
+		state->min_cdclk[i] = min_cdclk;
+	}
+
+	min_cdclk = state->cdclk.force_min_cdclk;
+	for_each_pipe(dev_priv, pipe)
+		min_cdclk = max(state->min_cdclk[pipe], min_cdclk);
+
+	return min_cdclk;
+}
+
+/*
+ * Note that this functions assumes that 0 is
+ * the lowest voltage value, and higher values
+ * correspond to increasingly higher voltages.
+ *
+ * Should that relationship no longer hold on
+ * future platforms this code will need to be
+ * adjusted.
+ */
+static u8 cnl_compute_min_voltage_level(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc *crtc;
+	struct intel_crtc_state *crtc_state;
+	u8 min_voltage_level;
+	int i;
+	enum pipe pipe;
+
+	memcpy(state->min_voltage_level, dev_priv->min_voltage_level,
+	       sizeof(state->min_voltage_level));
+
+	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+		if (crtc_state->base.enable)
+			state->min_voltage_level[i] =
+				crtc_state->min_voltage_level;
+		else
+			state->min_voltage_level[i] = 0;
+	}
+
+	min_voltage_level = 0;
+	for_each_pipe(dev_priv, pipe)
+		min_voltage_level = max(state->min_voltage_level[pipe],
+					min_voltage_level);
+
+	return min_voltage_level;
+}
+
+static int vlv_modeset_calc_cdclk(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	int min_cdclk, cdclk;
+
+	min_cdclk = intel_compute_min_cdclk(state);
+	if (min_cdclk < 0)
+		return min_cdclk;
+
+	cdclk = vlv_calc_cdclk(dev_priv, min_cdclk);
+
+	state->cdclk.logical.cdclk = cdclk;
+	state->cdclk.logical.voltage_level =
+		vlv_calc_voltage_level(dev_priv, cdclk);
+
+	if (!state->active_crtcs) {
+		cdclk = vlv_calc_cdclk(dev_priv, state->cdclk.force_min_cdclk);
+
+		state->cdclk.actual.cdclk = cdclk;
+		state->cdclk.actual.voltage_level =
+			vlv_calc_voltage_level(dev_priv, cdclk);
+	} else {
+		state->cdclk.actual = state->cdclk.logical;
+	}
+
+	return 0;
+}
+
+static int bdw_modeset_calc_cdclk(struct intel_atomic_state *state)
+{
+	int min_cdclk, cdclk;
+
+	min_cdclk = intel_compute_min_cdclk(state);
+	if (min_cdclk < 0)
+		return min_cdclk;
+
+	/*
+	 * FIXME should also account for plane ratio
+	 * once 64bpp pixel formats are supported.
+	 */
+	cdclk = bdw_calc_cdclk(min_cdclk);
+
+	state->cdclk.logical.cdclk = cdclk;
+	state->cdclk.logical.voltage_level =
+		bdw_calc_voltage_level(cdclk);
+
+	if (!state->active_crtcs) {
+		cdclk = bdw_calc_cdclk(state->cdclk.force_min_cdclk);
+
+		state->cdclk.actual.cdclk = cdclk;
+		state->cdclk.actual.voltage_level =
+			bdw_calc_voltage_level(cdclk);
+	} else {
+		state->cdclk.actual = state->cdclk.logical;
+	}
+
+	return 0;
+}
+
+static int skl_dpll0_vco(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc *crtc;
+	struct intel_crtc_state *crtc_state;
+	int vco, i;
+
+	vco = state->cdclk.logical.vco;
+	if (!vco)
+		vco = dev_priv->skl_preferred_vco_freq;
+
+	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+		if (!crtc_state->base.enable)
+			continue;
+
+		if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP))
+			continue;
+
+		/*
+		 * DPLL0 VCO may need to be adjusted to get the correct
+		 * clock for eDP. This will affect cdclk as well.
+		 */
+		switch (crtc_state->port_clock / 2) {
+		case 108000:
+		case 216000:
+			vco = 8640000;
+			break;
+		default:
+			vco = 8100000;
+			break;
+		}
+	}
+
+	return vco;
+}
+
+static int skl_modeset_calc_cdclk(struct intel_atomic_state *state)
+{
+	int min_cdclk, cdclk, vco;
+
+	min_cdclk = intel_compute_min_cdclk(state);
+	if (min_cdclk < 0)
+		return min_cdclk;
+
+	vco = skl_dpll0_vco(state);
+
+	/*
+	 * FIXME should also account for plane ratio
+	 * once 64bpp pixel formats are supported.
+	 */
+	cdclk = skl_calc_cdclk(min_cdclk, vco);
+
+	state->cdclk.logical.vco = vco;
+	state->cdclk.logical.cdclk = cdclk;
+	state->cdclk.logical.voltage_level =
+		skl_calc_voltage_level(cdclk);
+
+	if (!state->active_crtcs) {
+		cdclk = skl_calc_cdclk(state->cdclk.force_min_cdclk, vco);
+
+		state->cdclk.actual.vco = vco;
+		state->cdclk.actual.cdclk = cdclk;
+		state->cdclk.actual.voltage_level =
+			skl_calc_voltage_level(cdclk);
+	} else {
+		state->cdclk.actual = state->cdclk.logical;
+	}
+
+	return 0;
+}
+
+static int bxt_modeset_calc_cdclk(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	int min_cdclk, cdclk, vco;
+
+	min_cdclk = intel_compute_min_cdclk(state);
+	if (min_cdclk < 0)
+		return min_cdclk;
+
+	if (IS_GEMINILAKE(dev_priv)) {
+		cdclk = glk_calc_cdclk(min_cdclk);
+		vco = glk_de_pll_vco(dev_priv, cdclk);
+	} else {
+		cdclk = bxt_calc_cdclk(min_cdclk);
+		vco = bxt_de_pll_vco(dev_priv, cdclk);
+	}
+
+	state->cdclk.logical.vco = vco;
+	state->cdclk.logical.cdclk = cdclk;
+	state->cdclk.logical.voltage_level =
+		bxt_calc_voltage_level(cdclk);
+
+	if (!state->active_crtcs) {
+		if (IS_GEMINILAKE(dev_priv)) {
+			cdclk = glk_calc_cdclk(state->cdclk.force_min_cdclk);
+			vco = glk_de_pll_vco(dev_priv, cdclk);
+		} else {
+			cdclk = bxt_calc_cdclk(state->cdclk.force_min_cdclk);
+			vco = bxt_de_pll_vco(dev_priv, cdclk);
+		}
+
+		state->cdclk.actual.vco = vco;
+		state->cdclk.actual.cdclk = cdclk;
+		state->cdclk.actual.voltage_level =
+			bxt_calc_voltage_level(cdclk);
+	} else {
+		state->cdclk.actual = state->cdclk.logical;
+	}
+
+	return 0;
+}
+
+static int cnl_modeset_calc_cdclk(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	int min_cdclk, cdclk, vco;
+
+	min_cdclk = intel_compute_min_cdclk(state);
+	if (min_cdclk < 0)
+		return min_cdclk;
+
+	cdclk = cnl_calc_cdclk(min_cdclk);
+	vco = cnl_cdclk_pll_vco(dev_priv, cdclk);
+
+	state->cdclk.logical.vco = vco;
+	state->cdclk.logical.cdclk = cdclk;
+	state->cdclk.logical.voltage_level =
+		max(cnl_calc_voltage_level(cdclk),
+		    cnl_compute_min_voltage_level(state));
+
+	if (!state->active_crtcs) {
+		cdclk = cnl_calc_cdclk(state->cdclk.force_min_cdclk);
+		vco = cnl_cdclk_pll_vco(dev_priv, cdclk);
+
+		state->cdclk.actual.vco = vco;
+		state->cdclk.actual.cdclk = cdclk;
+		state->cdclk.actual.voltage_level =
+			cnl_calc_voltage_level(cdclk);
+	} else {
+		state->cdclk.actual = state->cdclk.logical;
+	}
+
+	return 0;
+}
+
+static int icl_modeset_calc_cdclk(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	unsigned int ref = state->cdclk.logical.ref;
+	int min_cdclk, cdclk, vco;
+
+	min_cdclk = intel_compute_min_cdclk(state);
+	if (min_cdclk < 0)
+		return min_cdclk;
+
+	cdclk = icl_calc_cdclk(min_cdclk, ref);
+	vco = icl_calc_cdclk_pll_vco(dev_priv, cdclk);
+
+	state->cdclk.logical.vco = vco;
+	state->cdclk.logical.cdclk = cdclk;
+	state->cdclk.logical.voltage_level =
+		max(icl_calc_voltage_level(cdclk),
+		    cnl_compute_min_voltage_level(state));
+
+	if (!state->active_crtcs) {
+		cdclk = icl_calc_cdclk(state->cdclk.force_min_cdclk, ref);
+		vco = icl_calc_cdclk_pll_vco(dev_priv, cdclk);
+
+		state->cdclk.actual.vco = vco;
+		state->cdclk.actual.cdclk = cdclk;
+		state->cdclk.actual.voltage_level =
+			icl_calc_voltage_level(cdclk);
+	} else {
+		state->cdclk.actual = state->cdclk.logical;
+	}
+
+	return 0;
+}
+
+static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv)
+{
+	int max_cdclk_freq = dev_priv->max_cdclk_freq;
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		return 2 * max_cdclk_freq;
+	else if (IS_GEN(dev_priv, 9) ||
+		 IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+		return max_cdclk_freq;
+	else if (IS_CHERRYVIEW(dev_priv))
+		return max_cdclk_freq*95/100;
+	else if (INTEL_GEN(dev_priv) < 4)
+		return 2*max_cdclk_freq*90/100;
+	else
+		return max_cdclk_freq*90/100;
+}
+
+/**
+ * intel_update_max_cdclk - Determine the maximum support CDCLK frequency
+ * @dev_priv: i915 device
+ *
+ * Determine the maximum CDCLK frequency the platform supports, and also
+ * derive the maximum dot clock frequency the maximum CDCLK frequency
+ * allows.
+ */
+void intel_update_max_cdclk(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) >= 11) {
+		if (dev_priv->cdclk.hw.ref == 24000)
+			dev_priv->max_cdclk_freq = 648000;
+		else
+			dev_priv->max_cdclk_freq = 652800;
+	} else if (IS_CANNONLAKE(dev_priv)) {
+		dev_priv->max_cdclk_freq = 528000;
+	} else if (IS_GEN9_BC(dev_priv)) {
+		u32 limit = I915_READ(SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK;
+		int max_cdclk, vco;
+
+		vco = dev_priv->skl_preferred_vco_freq;
+		WARN_ON(vco != 8100000 && vco != 8640000);
+
+		/*
+		 * Use the lower (vco 8640) cdclk values as a
+		 * first guess. skl_calc_cdclk() will correct it
+		 * if the preferred vco is 8100 instead.
+		 */
+		if (limit == SKL_DFSM_CDCLK_LIMIT_675)
+			max_cdclk = 617143;
+		else if (limit == SKL_DFSM_CDCLK_LIMIT_540)
+			max_cdclk = 540000;
+		else if (limit == SKL_DFSM_CDCLK_LIMIT_450)
+			max_cdclk = 432000;
+		else
+			max_cdclk = 308571;
+
+		dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco);
+	} else if (IS_GEMINILAKE(dev_priv)) {
+		dev_priv->max_cdclk_freq = 316800;
+	} else if (IS_BROXTON(dev_priv)) {
+		dev_priv->max_cdclk_freq = 624000;
+	} else if (IS_BROADWELL(dev_priv))  {
+		/*
+		 * FIXME with extra cooling we can allow
+		 * 540 MHz for ULX and 675 Mhz for ULT.
+		 * How can we know if extra cooling is
+		 * available? PCI ID, VTB, something else?
+		 */
+		if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT)
+			dev_priv->max_cdclk_freq = 450000;
+		else if (IS_BDW_ULX(dev_priv))
+			dev_priv->max_cdclk_freq = 450000;
+		else if (IS_BDW_ULT(dev_priv))
+			dev_priv->max_cdclk_freq = 540000;
+		else
+			dev_priv->max_cdclk_freq = 675000;
+	} else if (IS_CHERRYVIEW(dev_priv)) {
+		dev_priv->max_cdclk_freq = 320000;
+	} else if (IS_VALLEYVIEW(dev_priv)) {
+		dev_priv->max_cdclk_freq = 400000;
+	} else {
+		/* otherwise assume cdclk is fixed */
+		dev_priv->max_cdclk_freq = dev_priv->cdclk.hw.cdclk;
+	}
+
+	dev_priv->max_dotclk_freq = intel_compute_max_dotclk(dev_priv);
+
+	DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n",
+			 dev_priv->max_cdclk_freq);
+
+	DRM_DEBUG_DRIVER("Max dotclock rate: %d kHz\n",
+			 dev_priv->max_dotclk_freq);
+}
+
+/**
+ * intel_update_cdclk - Determine the current CDCLK frequency
+ * @dev_priv: i915 device
+ *
+ * Determine the current CDCLK frequency.
+ */
+void intel_update_cdclk(struct drm_i915_private *dev_priv)
+{
+	dev_priv->display.get_cdclk(dev_priv, &dev_priv->cdclk.hw);
+
+	/*
+	 * 9:0 CMBUS [sic] CDCLK frequency (cdfreq):
+	 * Programmng [sic] note: bit[9:2] should be programmed to the number
+	 * of cdclk that generates 4MHz reference clock freq which is used to
+	 * generate GMBus clock. This will vary with the cdclk freq.
+	 */
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		I915_WRITE(GMBUSFREQ_VLV,
+			   DIV_ROUND_UP(dev_priv->cdclk.hw.cdclk, 1000));
+}
+
+static int cnp_rawclk(struct drm_i915_private *dev_priv)
+{
+	u32 rawclk;
+	int divider, fraction;
+
+	if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) {
+		/* 24 MHz */
+		divider = 24000;
+		fraction = 0;
+	} else {
+		/* 19.2 MHz */
+		divider = 19000;
+		fraction = 200;
+	}
+
+	rawclk = CNP_RAWCLK_DIV(divider / 1000);
+	if (fraction) {
+		int numerator = 1;
+
+		rawclk |= CNP_RAWCLK_DEN(DIV_ROUND_CLOSEST(numerator * 1000,
+							   fraction) - 1);
+		if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
+			rawclk |= ICP_RAWCLK_NUM(numerator);
+	}
+
+	I915_WRITE(PCH_RAWCLK_FREQ, rawclk);
+	return divider + fraction;
+}
+
+static int pch_rawclk(struct drm_i915_private *dev_priv)
+{
+	return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000;
+}
+
+static int vlv_hrawclk(struct drm_i915_private *dev_priv)
+{
+	/* RAWCLK_FREQ_VLV register updated from power well code */
+	return vlv_get_cck_clock_hpll(dev_priv, "hrawclk",
+				      CCK_DISPLAY_REF_CLOCK_CONTROL);
+}
+
+static int g4x_hrawclk(struct drm_i915_private *dev_priv)
+{
+	u32 clkcfg;
+
+	/* hrawclock is 1/4 the FSB frequency */
+	clkcfg = I915_READ(CLKCFG);
+	switch (clkcfg & CLKCFG_FSB_MASK) {
+	case CLKCFG_FSB_400:
+		return 100000;
+	case CLKCFG_FSB_533:
+		return 133333;
+	case CLKCFG_FSB_667:
+		return 166667;
+	case CLKCFG_FSB_800:
+		return 200000;
+	case CLKCFG_FSB_1067:
+	case CLKCFG_FSB_1067_ALT:
+		return 266667;
+	case CLKCFG_FSB_1333:
+	case CLKCFG_FSB_1333_ALT:
+		return 333333;
+	default:
+		return 133333;
+	}
+}
+
+/**
+ * intel_update_rawclk - Determine the current RAWCLK frequency
+ * @dev_priv: i915 device
+ *
+ * Determine the current RAWCLK frequency. RAWCLK is a fixed
+ * frequency clock so this needs to done only once.
+ */
+void intel_update_rawclk(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
+		dev_priv->rawclk_freq = cnp_rawclk(dev_priv);
+	else if (HAS_PCH_SPLIT(dev_priv))
+		dev_priv->rawclk_freq = pch_rawclk(dev_priv);
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		dev_priv->rawclk_freq = vlv_hrawclk(dev_priv);
+	else if (IS_G4X(dev_priv) || IS_PINEVIEW(dev_priv))
+		dev_priv->rawclk_freq = g4x_hrawclk(dev_priv);
+	else
+		/* no rawclk on other platforms, or no need to know it */
+		return;
+
+	DRM_DEBUG_DRIVER("rawclk rate: %d kHz\n", dev_priv->rawclk_freq);
+}
+
+/**
+ * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks
+ * @dev_priv: i915 device
+ */
+void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) >= 11) {
+		dev_priv->display.set_cdclk = icl_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = icl_modeset_calc_cdclk;
+	} else if (IS_CANNONLAKE(dev_priv)) {
+		dev_priv->display.set_cdclk = cnl_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = cnl_modeset_calc_cdclk;
+	} else if (IS_GEN9_LP(dev_priv)) {
+		dev_priv->display.set_cdclk = bxt_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
+	} else if (IS_GEN9_BC(dev_priv)) {
+		dev_priv->display.set_cdclk = skl_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = skl_modeset_calc_cdclk;
+	} else if (IS_BROADWELL(dev_priv)) {
+		dev_priv->display.set_cdclk = bdw_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = bdw_modeset_calc_cdclk;
+	} else if (IS_CHERRYVIEW(dev_priv)) {
+		dev_priv->display.set_cdclk = chv_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
+	} else if (IS_VALLEYVIEW(dev_priv)) {
+		dev_priv->display.set_cdclk = vlv_set_cdclk;
+		dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		dev_priv->display.get_cdclk = icl_get_cdclk;
+	else if (IS_CANNONLAKE(dev_priv))
+		dev_priv->display.get_cdclk = cnl_get_cdclk;
+	else if (IS_GEN9_LP(dev_priv))
+		dev_priv->display.get_cdclk = bxt_get_cdclk;
+	else if (IS_GEN9_BC(dev_priv))
+		dev_priv->display.get_cdclk = skl_get_cdclk;
+	else if (IS_BROADWELL(dev_priv))
+		dev_priv->display.get_cdclk = bdw_get_cdclk;
+	else if (IS_HASWELL(dev_priv))
+		dev_priv->display.get_cdclk = hsw_get_cdclk;
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		dev_priv->display.get_cdclk = vlv_get_cdclk;
+	else if (IS_GEN(dev_priv, 6) || IS_IVYBRIDGE(dev_priv))
+		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
+	else if (IS_GEN(dev_priv, 5))
+		dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk;
+	else if (IS_GM45(dev_priv))
+		dev_priv->display.get_cdclk = gm45_get_cdclk;
+	else if (IS_G45(dev_priv))
+		dev_priv->display.get_cdclk = g33_get_cdclk;
+	else if (IS_I965GM(dev_priv))
+		dev_priv->display.get_cdclk = i965gm_get_cdclk;
+	else if (IS_I965G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
+	else if (IS_PINEVIEW(dev_priv))
+		dev_priv->display.get_cdclk = pnv_get_cdclk;
+	else if (IS_G33(dev_priv))
+		dev_priv->display.get_cdclk = g33_get_cdclk;
+	else if (IS_I945GM(dev_priv))
+		dev_priv->display.get_cdclk = i945gm_get_cdclk;
+	else if (IS_I945G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
+	else if (IS_I915GM(dev_priv))
+		dev_priv->display.get_cdclk = i915gm_get_cdclk;
+	else if (IS_I915G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk;
+	else if (IS_I865G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk;
+	else if (IS_I85X(dev_priv))
+		dev_priv->display.get_cdclk = i85x_get_cdclk;
+	else if (IS_I845G(dev_priv))
+		dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk;
+	else { /* 830 */
+		WARN(!IS_I830(dev_priv),
+		     "Unknown platform. Assuming 133 MHz CDCLK\n");
+		dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk;
+	}
+}
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.h b/drivers/gpu/drm/i915/display/intel_cdclk.h
new file mode 100644
index 000000000000..4d6f7f5f8930
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_CDCLK_H__
+#define __INTEL_CDCLK_H__
+
+#include <linux/types.h>
+
+#include "intel_display.h"
+
+struct drm_i915_private;
+struct intel_atomic_state;
+struct intel_cdclk_state;
+struct intel_crtc_state;
+
+int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state);
+void intel_cdclk_init(struct drm_i915_private *i915);
+void intel_cdclk_uninit(struct drm_i915_private *i915);
+void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv);
+void intel_update_max_cdclk(struct drm_i915_private *dev_priv);
+void intel_update_cdclk(struct drm_i915_private *dev_priv);
+void intel_update_rawclk(struct drm_i915_private *dev_priv);
+bool intel_cdclk_needs_cd2x_update(struct drm_i915_private *dev_priv,
+				   const struct intel_cdclk_state *a,
+				   const struct intel_cdclk_state *b);
+bool intel_cdclk_needs_modeset(const struct intel_cdclk_state *a,
+			       const struct intel_cdclk_state *b);
+bool intel_cdclk_changed(const struct intel_cdclk_state *a,
+			 const struct intel_cdclk_state *b);
+void intel_cdclk_swap_state(struct intel_atomic_state *state);
+void
+intel_set_cdclk_pre_plane_update(struct drm_i915_private *dev_priv,
+				 const struct intel_cdclk_state *old_state,
+				 const struct intel_cdclk_state *new_state,
+				 enum pipe pipe);
+void
+intel_set_cdclk_post_plane_update(struct drm_i915_private *dev_priv,
+				  const struct intel_cdclk_state *old_state,
+				  const struct intel_cdclk_state *new_state,
+				  enum pipe pipe);
+void intel_dump_cdclk_state(const struct intel_cdclk_state *cdclk_state,
+			    const char *context);
+
+#endif /* __INTEL_CDCLK_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
new file mode 100644
index 000000000000..23a84dd7989f
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -0,0 +1,1428 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "intel_color.h"
+#include "intel_drv.h"
+
+#define CTM_COEFF_SIGN	(1ULL << 63)
+
+#define CTM_COEFF_1_0	(1ULL << 32)
+#define CTM_COEFF_2_0	(CTM_COEFF_1_0 << 1)
+#define CTM_COEFF_4_0	(CTM_COEFF_2_0 << 1)
+#define CTM_COEFF_8_0	(CTM_COEFF_4_0 << 1)
+#define CTM_COEFF_0_5	(CTM_COEFF_1_0 >> 1)
+#define CTM_COEFF_0_25	(CTM_COEFF_0_5 >> 1)
+#define CTM_COEFF_0_125	(CTM_COEFF_0_25 >> 1)
+
+#define CTM_COEFF_LIMITED_RANGE ((235ULL - 16ULL) * CTM_COEFF_1_0 / 255)
+
+#define CTM_COEFF_NEGATIVE(coeff)	(((coeff) & CTM_COEFF_SIGN) != 0)
+#define CTM_COEFF_ABS(coeff)		((coeff) & (CTM_COEFF_SIGN - 1))
+
+#define LEGACY_LUT_LENGTH		256
+
+/*
+ * Extract the CSC coefficient from a CTM coefficient (in U32.32 fixed point
+ * format). This macro takes the coefficient we want transformed and the
+ * number of fractional bits.
+ *
+ * We only have a 9 bits precision window which slides depending on the value
+ * of the CTM coefficient and we write the value from bit 3. We also round the
+ * value.
+ */
+#define ILK_CSC_COEFF_FP(coeff, fbits)	\
+	(clamp_val(((coeff) >> (32 - (fbits) - 3)) + 4, 0, 0xfff) & 0xff8)
+
+#define ILK_CSC_COEFF_LIMITED_RANGE 0x0dc0
+#define ILK_CSC_COEFF_1_0 0x7800
+
+#define ILK_CSC_POSTOFF_LIMITED_RANGE (16 * (1 << 12) / 255)
+
+static const u16 ilk_csc_off_zero[3] = {};
+
+static const u16 ilk_csc_coeff_identity[9] = {
+	ILK_CSC_COEFF_1_0, 0, 0,
+	0, ILK_CSC_COEFF_1_0, 0,
+	0, 0, ILK_CSC_COEFF_1_0,
+};
+
+static const u16 ilk_csc_postoff_limited_range[3] = {
+	ILK_CSC_POSTOFF_LIMITED_RANGE,
+	ILK_CSC_POSTOFF_LIMITED_RANGE,
+	ILK_CSC_POSTOFF_LIMITED_RANGE,
+};
+
+static const u16 ilk_csc_coeff_limited_range[9] = {
+	ILK_CSC_COEFF_LIMITED_RANGE, 0, 0,
+	0, ILK_CSC_COEFF_LIMITED_RANGE, 0,
+	0, 0, ILK_CSC_COEFF_LIMITED_RANGE,
+};
+
+/*
+ * These values are direct register values specified in the Bspec,
+ * for RGB->YUV conversion matrix (colorspace BT709)
+ */
+static const u16 ilk_csc_coeff_rgb_to_ycbcr[9] = {
+	0x1e08, 0x9cc0, 0xb528,
+	0x2ba8, 0x09d8, 0x37e8,
+	0xbce8, 0x9ad8, 0x1e08,
+};
+
+/* Post offset values for RGB->YCBCR conversion */
+static const u16 ilk_csc_postoff_rgb_to_ycbcr[3] = {
+	0x0800, 0x0100, 0x0800,
+};
+
+static bool lut_is_legacy(const struct drm_property_blob *lut)
+{
+	return drm_color_lut_size(lut) == LEGACY_LUT_LENGTH;
+}
+
+static bool crtc_state_is_legacy_gamma(const struct intel_crtc_state *crtc_state)
+{
+	return !crtc_state->base.degamma_lut &&
+		!crtc_state->base.ctm &&
+		crtc_state->base.gamma_lut &&
+		lut_is_legacy(crtc_state->base.gamma_lut);
+}
+
+/*
+ * When using limited range, multiply the matrix given by userspace by
+ * the matrix that we would use for the limited range.
+ */
+static u64 *ctm_mult_by_limited(u64 *result, const u64 *input)
+{
+	int i;
+
+	for (i = 0; i < 9; i++) {
+		u64 user_coeff = input[i];
+		u32 limited_coeff = CTM_COEFF_LIMITED_RANGE;
+		u32 abs_coeff = clamp_val(CTM_COEFF_ABS(user_coeff), 0,
+					  CTM_COEFF_4_0 - 1) >> 2;
+
+		/*
+		 * By scaling every co-efficient with limited range (16-235)
+		 * vs full range (0-255) the final o/p will be scaled down to
+		 * fit in the limited range supported by the panel.
+		 */
+		result[i] = mul_u32_u32(limited_coeff, abs_coeff) >> 30;
+		result[i] |= user_coeff & CTM_COEFF_SIGN;
+	}
+
+	return result;
+}
+
+static void ilk_update_pipe_csc(struct intel_crtc *crtc,
+				const u16 preoff[3],
+				const u16 coeff[9],
+				const u16 postoff[3])
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), preoff[0]);
+	I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), preoff[1]);
+	I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), preoff[2]);
+
+	I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff[0] << 16 | coeff[1]);
+	I915_WRITE(PIPE_CSC_COEFF_BY(pipe), coeff[2] << 16);
+
+	I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff[3] << 16 | coeff[4]);
+	I915_WRITE(PIPE_CSC_COEFF_BU(pipe), coeff[5] << 16);
+
+	I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), coeff[6] << 16 | coeff[7]);
+	I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff[8] << 16);
+
+	if (INTEL_GEN(dev_priv) >= 7) {
+		I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff[0]);
+		I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff[1]);
+		I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff[2]);
+	}
+}
+
+static void icl_update_output_csc(struct intel_crtc *crtc,
+				  const u16 preoff[3],
+				  const u16 coeff[9],
+				  const u16 postoff[3])
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	I915_WRITE(PIPE_CSC_OUTPUT_PREOFF_HI(pipe), preoff[0]);
+	I915_WRITE(PIPE_CSC_OUTPUT_PREOFF_ME(pipe), preoff[1]);
+	I915_WRITE(PIPE_CSC_OUTPUT_PREOFF_LO(pipe), preoff[2]);
+
+	I915_WRITE(PIPE_CSC_OUTPUT_COEFF_RY_GY(pipe), coeff[0] << 16 | coeff[1]);
+	I915_WRITE(PIPE_CSC_OUTPUT_COEFF_BY(pipe), coeff[2] << 16);
+
+	I915_WRITE(PIPE_CSC_OUTPUT_COEFF_RU_GU(pipe), coeff[3] << 16 | coeff[4]);
+	I915_WRITE(PIPE_CSC_OUTPUT_COEFF_BU(pipe), coeff[5] << 16);
+
+	I915_WRITE(PIPE_CSC_OUTPUT_COEFF_RV_GV(pipe), coeff[6] << 16 | coeff[7]);
+	I915_WRITE(PIPE_CSC_OUTPUT_COEFF_BV(pipe), coeff[8] << 16);
+
+	I915_WRITE(PIPE_CSC_OUTPUT_POSTOFF_HI(pipe), postoff[0]);
+	I915_WRITE(PIPE_CSC_OUTPUT_POSTOFF_ME(pipe), postoff[1]);
+	I915_WRITE(PIPE_CSC_OUTPUT_POSTOFF_LO(pipe), postoff[2]);
+}
+
+static bool ilk_csc_limited_range(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	/*
+	 * FIXME if there's a gamma LUT after the CSC, we should
+	 * do the range compression using the gamma LUT instead.
+	 */
+	return crtc_state->limited_color_range &&
+		(IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) ||
+		 IS_GEN_RANGE(dev_priv, 9, 10));
+}
+
+static void ilk_csc_convert_ctm(const struct intel_crtc_state *crtc_state,
+				u16 coeffs[9])
+{
+	const struct drm_color_ctm *ctm = crtc_state->base.ctm->data;
+	const u64 *input;
+	u64 temp[9];
+	int i;
+
+	if (ilk_csc_limited_range(crtc_state))
+		input = ctm_mult_by_limited(temp, ctm->matrix);
+	else
+		input = ctm->matrix;
+
+	/*
+	 * Convert fixed point S31.32 input to format supported by the
+	 * hardware.
+	 */
+	for (i = 0; i < 9; i++) {
+		u64 abs_coeff = ((1ULL << 63) - 1) & input[i];
+
+		/*
+		 * Clamp input value to min/max supported by
+		 * hardware.
+		 */
+		abs_coeff = clamp_val(abs_coeff, 0, CTM_COEFF_4_0 - 1);
+
+		coeffs[i] = 0;
+
+		/* sign bit */
+		if (CTM_COEFF_NEGATIVE(input[i]))
+			coeffs[i] |= 1 << 15;
+
+		if (abs_coeff < CTM_COEFF_0_125)
+			coeffs[i] |= (3 << 12) |
+				ILK_CSC_COEFF_FP(abs_coeff, 12);
+		else if (abs_coeff < CTM_COEFF_0_25)
+			coeffs[i] |= (2 << 12) |
+				ILK_CSC_COEFF_FP(abs_coeff, 11);
+		else if (abs_coeff < CTM_COEFF_0_5)
+			coeffs[i] |= (1 << 12) |
+				ILK_CSC_COEFF_FP(abs_coeff, 10);
+		else if (abs_coeff < CTM_COEFF_1_0)
+			coeffs[i] |= ILK_CSC_COEFF_FP(abs_coeff, 9);
+		else if (abs_coeff < CTM_COEFF_2_0)
+			coeffs[i] |= (7 << 12) |
+				ILK_CSC_COEFF_FP(abs_coeff, 8);
+		else
+			coeffs[i] |= (6 << 12) |
+				ILK_CSC_COEFF_FP(abs_coeff, 7);
+	}
+}
+
+static void ilk_load_csc_matrix(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	bool limited_color_range = ilk_csc_limited_range(crtc_state);
+
+	if (crtc_state->base.ctm) {
+		u16 coeff[9];
+
+		ilk_csc_convert_ctm(crtc_state, coeff);
+		ilk_update_pipe_csc(crtc, ilk_csc_off_zero, coeff,
+				    limited_color_range ?
+				    ilk_csc_postoff_limited_range :
+				    ilk_csc_off_zero);
+	} else if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB) {
+		ilk_update_pipe_csc(crtc, ilk_csc_off_zero,
+				    ilk_csc_coeff_rgb_to_ycbcr,
+				    ilk_csc_postoff_rgb_to_ycbcr);
+	} else if (limited_color_range) {
+		ilk_update_pipe_csc(crtc, ilk_csc_off_zero,
+				    ilk_csc_coeff_limited_range,
+				    ilk_csc_postoff_limited_range);
+	} else if (crtc_state->csc_enable) {
+		/*
+		 * On GLK+ both pipe CSC and degamma LUT are controlled
+		 * by csc_enable. Hence for the cases where the degama
+		 * LUT is needed but CSC is not we need to load an
+		 * identity matrix.
+		 */
+		WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_GEMINILAKE(dev_priv));
+
+		ilk_update_pipe_csc(crtc, ilk_csc_off_zero,
+				    ilk_csc_coeff_identity,
+				    ilk_csc_off_zero);
+	}
+
+	I915_WRITE(PIPE_CSC_MODE(crtc->pipe), crtc_state->csc_mode);
+}
+
+static void icl_load_csc_matrix(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (crtc_state->base.ctm) {
+		u16 coeff[9];
+
+		ilk_csc_convert_ctm(crtc_state, coeff);
+		ilk_update_pipe_csc(crtc, ilk_csc_off_zero,
+				    coeff, ilk_csc_off_zero);
+	}
+
+	if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB) {
+		icl_update_output_csc(crtc, ilk_csc_off_zero,
+				      ilk_csc_coeff_rgb_to_ycbcr,
+				      ilk_csc_postoff_rgb_to_ycbcr);
+	} else if (crtc_state->limited_color_range) {
+		icl_update_output_csc(crtc, ilk_csc_off_zero,
+				      ilk_csc_coeff_limited_range,
+				      ilk_csc_postoff_limited_range);
+	}
+
+	I915_WRITE(PIPE_CSC_MODE(crtc->pipe), crtc_state->csc_mode);
+}
+
+/*
+ * Set up the pipe CSC unit on CherryView.
+ */
+static void cherryview_load_csc_matrix(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	if (crtc_state->base.ctm) {
+		const struct drm_color_ctm *ctm = crtc_state->base.ctm->data;
+		u16 coeffs[9] = {};
+		int i;
+
+		for (i = 0; i < ARRAY_SIZE(coeffs); i++) {
+			u64 abs_coeff =
+				((1ULL << 63) - 1) & ctm->matrix[i];
+
+			/* Round coefficient. */
+			abs_coeff += 1 << (32 - 13);
+			/* Clamp to hardware limits. */
+			abs_coeff = clamp_val(abs_coeff, 0, CTM_COEFF_8_0 - 1);
+
+			/* Write coefficients in S3.12 format. */
+			if (ctm->matrix[i] & (1ULL << 63))
+				coeffs[i] = 1 << 15;
+			coeffs[i] |= ((abs_coeff >> 32) & 7) << 12;
+			coeffs[i] |= (abs_coeff >> 20) & 0xfff;
+		}
+
+		I915_WRITE(CGM_PIPE_CSC_COEFF01(pipe),
+			   coeffs[1] << 16 | coeffs[0]);
+		I915_WRITE(CGM_PIPE_CSC_COEFF23(pipe),
+			   coeffs[3] << 16 | coeffs[2]);
+		I915_WRITE(CGM_PIPE_CSC_COEFF45(pipe),
+			   coeffs[5] << 16 | coeffs[4]);
+		I915_WRITE(CGM_PIPE_CSC_COEFF67(pipe),
+			   coeffs[7] << 16 | coeffs[6]);
+		I915_WRITE(CGM_PIPE_CSC_COEFF8(pipe), coeffs[8]);
+	}
+
+	I915_WRITE(CGM_PIPE_MODE(pipe), crtc_state->cgm_mode);
+}
+
+/* i965+ "10.6" bit interpolated format "even DW" (low 8 bits) */
+static u32 i965_lut_10p6_ldw(const struct drm_color_lut *color)
+{
+	return (color->red & 0xff) << 16 |
+		(color->green & 0xff) << 8 |
+		(color->blue & 0xff);
+}
+
+/* i965+ "10.6" interpolated format "odd DW" (high 8 bits) */
+static u32 i965_lut_10p6_udw(const struct drm_color_lut *color)
+{
+	return (color->red >> 8) << 16 |
+		(color->green >> 8) << 8 |
+		(color->blue >> 8);
+}
+
+static u32 ilk_lut_10(const struct drm_color_lut *color)
+{
+	return drm_color_lut_extract(color->red, 10) << 20 |
+		drm_color_lut_extract(color->green, 10) << 10 |
+		drm_color_lut_extract(color->blue, 10);
+}
+
+/* Loads the legacy palette/gamma unit for the CRTC. */
+static void i9xx_load_luts_internal(const struct intel_crtc_state *crtc_state,
+				    const struct drm_property_blob *blob)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	int i;
+
+	if (HAS_GMCH(dev_priv)) {
+		if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
+			assert_dsi_pll_enabled(dev_priv);
+		else
+			assert_pll_enabled(dev_priv, pipe);
+	}
+
+	if (blob) {
+		const struct drm_color_lut *lut = blob->data;
+
+		for (i = 0; i < 256; i++) {
+			u32 word =
+				(drm_color_lut_extract(lut[i].red, 8) << 16) |
+				(drm_color_lut_extract(lut[i].green, 8) << 8) |
+				drm_color_lut_extract(lut[i].blue, 8);
+
+			if (HAS_GMCH(dev_priv))
+				I915_WRITE(PALETTE(pipe, i), word);
+			else
+				I915_WRITE(LGC_PALETTE(pipe, i), word);
+		}
+	}
+}
+
+static void i9xx_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	i9xx_load_luts_internal(crtc_state, crtc_state->base.gamma_lut);
+}
+
+static void i9xx_color_commit(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 val;
+
+	val = I915_READ(PIPECONF(pipe));
+	val &= ~PIPECONF_GAMMA_MODE_MASK_I9XX;
+	val |= PIPECONF_GAMMA_MODE(crtc_state->gamma_mode);
+	I915_WRITE(PIPECONF(pipe), val);
+}
+
+static void ilk_color_commit(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 val;
+
+	val = I915_READ(PIPECONF(pipe));
+	val &= ~PIPECONF_GAMMA_MODE_MASK_ILK;
+	val |= PIPECONF_GAMMA_MODE(crtc_state->gamma_mode);
+	I915_WRITE(PIPECONF(pipe), val);
+
+	ilk_load_csc_matrix(crtc_state);
+}
+
+static void hsw_color_commit(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	I915_WRITE(GAMMA_MODE(crtc->pipe), crtc_state->gamma_mode);
+
+	ilk_load_csc_matrix(crtc_state);
+}
+
+static void skl_color_commit(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 val = 0;
+
+	/*
+	 * We don't (yet) allow userspace to control the pipe background color,
+	 * so force it to black, but apply pipe gamma and CSC appropriately
+	 * so that its handling will match how we program our planes.
+	 */
+	if (crtc_state->gamma_enable)
+		val |= SKL_BOTTOM_COLOR_GAMMA_ENABLE;
+	if (crtc_state->csc_enable)
+		val |= SKL_BOTTOM_COLOR_CSC_ENABLE;
+	I915_WRITE(SKL_BOTTOM_COLOR(pipe), val);
+
+	I915_WRITE(GAMMA_MODE(crtc->pipe), crtc_state->gamma_mode);
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		icl_load_csc_matrix(crtc_state);
+	else
+		ilk_load_csc_matrix(crtc_state);
+}
+
+static void i965_load_lut_10p6(struct intel_crtc *crtc,
+			       const struct drm_property_blob *blob)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_color_lut *lut = blob->data;
+	int i, lut_size = drm_color_lut_size(blob);
+	enum pipe pipe = crtc->pipe;
+
+	for (i = 0; i < lut_size - 1; i++) {
+		I915_WRITE(PALETTE(pipe, 2 * i + 0),
+			   i965_lut_10p6_ldw(&lut[i]));
+		I915_WRITE(PALETTE(pipe, 2 * i + 1),
+			   i965_lut_10p6_udw(&lut[i]));
+	}
+
+	I915_WRITE(PIPEGCMAX(pipe, 0), lut[i].red);
+	I915_WRITE(PIPEGCMAX(pipe, 1), lut[i].green);
+	I915_WRITE(PIPEGCMAX(pipe, 2), lut[i].blue);
+}
+
+static void i965_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+
+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+		i9xx_load_luts(crtc_state);
+	else
+		i965_load_lut_10p6(crtc, gamma_lut);
+}
+
+static void ilk_load_lut_10(struct intel_crtc *crtc,
+			    const struct drm_property_blob *blob)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_color_lut *lut = blob->data;
+	int i, lut_size = drm_color_lut_size(blob);
+	enum pipe pipe = crtc->pipe;
+
+	for (i = 0; i < lut_size; i++)
+		I915_WRITE(PREC_PALETTE(pipe, i), ilk_lut_10(&lut[i]));
+}
+
+static void ilk_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+
+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+		i9xx_load_luts(crtc_state);
+	else
+		ilk_load_lut_10(crtc, gamma_lut);
+}
+
+static int ivb_lut_10_size(u32 prec_index)
+{
+	if (prec_index & PAL_PREC_SPLIT_MODE)
+		return 512;
+	else
+		return 1024;
+}
+
+/*
+ * IVB/HSW Bspec / PAL_PREC_INDEX:
+ * "Restriction : Index auto increment mode is not
+ *  supported and must not be enabled."
+ */
+static void ivb_load_lut_10(struct intel_crtc *crtc,
+			    const struct drm_property_blob *blob,
+			    u32 prec_index)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	int hw_lut_size = ivb_lut_10_size(prec_index);
+	const struct drm_color_lut *lut = blob->data;
+	int i, lut_size = drm_color_lut_size(blob);
+	enum pipe pipe = crtc->pipe;
+
+	for (i = 0; i < hw_lut_size; i++) {
+		/* We discard half the user entries in split gamma mode */
+		const struct drm_color_lut *entry =
+			&lut[i * (lut_size - 1) / (hw_lut_size - 1)];
+
+		I915_WRITE(PREC_PAL_INDEX(pipe), prec_index++);
+		I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_10(entry));
+	}
+
+	/*
+	 * Reset the index, otherwise it prevents the legacy palette to be
+	 * written properly.
+	 */
+	I915_WRITE(PREC_PAL_INDEX(pipe), 0);
+}
+
+/* On BDW+ the index auto increment mode actually works */
+static void bdw_load_lut_10(struct intel_crtc *crtc,
+			    const struct drm_property_blob *blob,
+			    u32 prec_index)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	int hw_lut_size = ivb_lut_10_size(prec_index);
+	const struct drm_color_lut *lut = blob->data;
+	int i, lut_size = drm_color_lut_size(blob);
+	enum pipe pipe = crtc->pipe;
+
+	I915_WRITE(PREC_PAL_INDEX(pipe), prec_index |
+		   PAL_PREC_AUTO_INCREMENT);
+
+	for (i = 0; i < hw_lut_size; i++) {
+		/* We discard half the user entries in split gamma mode */
+		const struct drm_color_lut *entry =
+			&lut[i * (lut_size - 1) / (hw_lut_size - 1)];
+
+		I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_10(entry));
+	}
+
+	/*
+	 * Reset the index, otherwise it prevents the legacy palette to be
+	 * written properly.
+	 */
+	I915_WRITE(PREC_PAL_INDEX(pipe), 0);
+}
+
+static void ivb_load_lut_ext_max(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	/* Program the max register to clamp values > 1.0. */
+	I915_WRITE(PREC_PAL_EXT_GC_MAX(pipe, 0), 1 << 16);
+	I915_WRITE(PREC_PAL_EXT_GC_MAX(pipe, 1), 1 << 16);
+	I915_WRITE(PREC_PAL_EXT_GC_MAX(pipe, 2), 1 << 16);
+
+	/*
+	 * Program the gc max 2 register to clamp values > 1.0.
+	 * ToDo: Extend the ABI to be able to program values
+	 * from 3.0 to 7.0
+	 */
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+		I915_WRITE(PREC_PAL_EXT2_GC_MAX(pipe, 0), 1 << 16);
+		I915_WRITE(PREC_PAL_EXT2_GC_MAX(pipe, 1), 1 << 16);
+		I915_WRITE(PREC_PAL_EXT2_GC_MAX(pipe, 2), 1 << 16);
+	}
+}
+
+static void ivb_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+	const struct drm_property_blob *degamma_lut = crtc_state->base.degamma_lut;
+
+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) {
+		i9xx_load_luts(crtc_state);
+	} else if (crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) {
+		ivb_load_lut_10(crtc, degamma_lut, PAL_PREC_SPLIT_MODE |
+				PAL_PREC_INDEX_VALUE(0));
+		ivb_load_lut_ext_max(crtc);
+		ivb_load_lut_10(crtc, gamma_lut, PAL_PREC_SPLIT_MODE |
+				PAL_PREC_INDEX_VALUE(512));
+	} else {
+		const struct drm_property_blob *blob = gamma_lut ?: degamma_lut;
+
+		ivb_load_lut_10(crtc, blob,
+				PAL_PREC_INDEX_VALUE(0));
+		ivb_load_lut_ext_max(crtc);
+	}
+}
+
+static void bdw_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+	const struct drm_property_blob *degamma_lut = crtc_state->base.degamma_lut;
+
+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) {
+		i9xx_load_luts(crtc_state);
+	} else if (crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) {
+		bdw_load_lut_10(crtc, degamma_lut, PAL_PREC_SPLIT_MODE |
+				PAL_PREC_INDEX_VALUE(0));
+		ivb_load_lut_ext_max(crtc);
+		bdw_load_lut_10(crtc, gamma_lut, PAL_PREC_SPLIT_MODE |
+				PAL_PREC_INDEX_VALUE(512));
+	} else {
+		const struct drm_property_blob *blob = gamma_lut ?: degamma_lut;
+
+		bdw_load_lut_10(crtc, blob,
+				PAL_PREC_INDEX_VALUE(0));
+		ivb_load_lut_ext_max(crtc);
+	}
+}
+
+static void glk_load_degamma_lut(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	const u32 lut_size = INTEL_INFO(dev_priv)->color.degamma_lut_size;
+	const struct drm_color_lut *lut = crtc_state->base.degamma_lut->data;
+	u32 i;
+
+	/*
+	 * When setting the auto-increment bit, the hardware seems to
+	 * ignore the index bits, so we need to reset it to index 0
+	 * separately.
+	 */
+	I915_WRITE(PRE_CSC_GAMC_INDEX(pipe), 0);
+	I915_WRITE(PRE_CSC_GAMC_INDEX(pipe), PRE_CSC_GAMC_AUTO_INCREMENT);
+
+	for (i = 0; i < lut_size; i++) {
+		/*
+		 * First 33 entries represent range from 0 to 1.0
+		 * 34th and 35th entry will represent extended range
+		 * inputs 3.0 and 7.0 respectively, currently clamped
+		 * at 1.0. Since the precision is 16bit, the user
+		 * value can be directly filled to register.
+		 * The pipe degamma table in GLK+ onwards doesn't
+		 * support different values per channel, so this just
+		 * programs green value which will be equal to Red and
+		 * Blue into the lut registers.
+		 * ToDo: Extend to max 7.0. Enable 32 bit input value
+		 * as compared to just 16 to achieve this.
+		 */
+		I915_WRITE(PRE_CSC_GAMC_DATA(pipe), lut[i].green);
+	}
+
+	/* Clamp values > 1.0. */
+	while (i++ < 35)
+		I915_WRITE(PRE_CSC_GAMC_DATA(pipe), 1 << 16);
+}
+
+static void glk_load_degamma_lut_linear(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	const u32 lut_size = INTEL_INFO(dev_priv)->color.degamma_lut_size;
+	u32 i;
+
+	/*
+	 * When setting the auto-increment bit, the hardware seems to
+	 * ignore the index bits, so we need to reset it to index 0
+	 * separately.
+	 */
+	I915_WRITE(PRE_CSC_GAMC_INDEX(pipe), 0);
+	I915_WRITE(PRE_CSC_GAMC_INDEX(pipe), PRE_CSC_GAMC_AUTO_INCREMENT);
+
+	for (i = 0; i < lut_size; i++) {
+		u32 v = (i << 16) / (lut_size - 1);
+
+		I915_WRITE(PRE_CSC_GAMC_DATA(pipe), v);
+	}
+
+	/* Clamp values > 1.0. */
+	while (i++ < 35)
+		I915_WRITE(PRE_CSC_GAMC_DATA(pipe), 1 << 16);
+}
+
+static void glk_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	/*
+	 * On GLK+ both pipe CSC and degamma LUT are controlled
+	 * by csc_enable. Hence for the cases where the CSC is
+	 * needed but degamma LUT is not we need to load a
+	 * linear degamma LUT. In fact we'll just always load
+	 * the degama LUT so that we don't have to reload
+	 * it every time the pipe CSC is being enabled.
+	 */
+	if (crtc_state->base.degamma_lut)
+		glk_load_degamma_lut(crtc_state);
+	else
+		glk_load_degamma_lut_linear(crtc_state);
+
+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) {
+		i9xx_load_luts(crtc_state);
+	} else {
+		bdw_load_lut_10(crtc, gamma_lut, PAL_PREC_INDEX_VALUE(0));
+		ivb_load_lut_ext_max(crtc);
+	}
+}
+
+/* ilk+ "12.4" interpolated format (high 10 bits) */
+static u32 ilk_lut_12p4_udw(const struct drm_color_lut *color)
+{
+	return (color->red >> 6) << 20 | (color->green >> 6) << 10 |
+		(color->blue >> 6);
+}
+
+/* ilk+ "12.4" interpolated format (low 6 bits) */
+static u32 ilk_lut_12p4_ldw(const struct drm_color_lut *color)
+{
+	return (color->red & 0x3f) << 24 | (color->green & 0x3f) << 14 |
+		(color->blue & 0x3f) << 4;
+}
+
+static void
+icl_load_gcmax(const struct intel_crtc_state *crtc_state,
+	       const struct drm_color_lut *color)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	/* Fixme: LUT entries are 16 bit only, so we can prog 0xFFFF max */
+	I915_WRITE(PREC_PAL_GC_MAX(pipe, 0), color->red);
+	I915_WRITE(PREC_PAL_GC_MAX(pipe, 1), color->green);
+	I915_WRITE(PREC_PAL_GC_MAX(pipe, 2), color->blue);
+}
+
+static void
+icl_program_gamma_superfine_segment(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_property_blob *blob = crtc_state->base.gamma_lut;
+	const struct drm_color_lut *lut = blob->data;
+	enum pipe pipe = crtc->pipe;
+	u32 i;
+
+	/*
+	 * Every entry in the multi-segment LUT is corresponding to a superfine
+	 * segment step which is 1/(8 * 128 * 256).
+	 *
+	 * Superfine segment has 9 entries, corresponding to values
+	 * 0, 1/(8 * 128 * 256), 2/(8 * 128 * 256) .... 8/(8 * 128 * 256).
+	 */
+	I915_WRITE(PREC_PAL_MULTI_SEG_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
+
+	for (i = 0; i < 9; i++) {
+		const struct drm_color_lut *entry = &lut[i];
+
+		I915_WRITE(PREC_PAL_MULTI_SEG_DATA(pipe),
+			   ilk_lut_12p4_ldw(entry));
+		I915_WRITE(PREC_PAL_MULTI_SEG_DATA(pipe),
+			   ilk_lut_12p4_udw(entry));
+	}
+}
+
+static void
+icl_program_gamma_multi_segment(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_property_blob *blob = crtc_state->base.gamma_lut;
+	const struct drm_color_lut *lut = blob->data;
+	const struct drm_color_lut *entry;
+	enum pipe pipe = crtc->pipe;
+	u32 i;
+
+	/*
+	 *
+	 * Program Fine segment (let's call it seg2)...
+	 *
+	 * Fine segment's step is 1/(128 * 256) ie 1/(128 * 256),  2/(128*256)
+	 * ... 256/(128*256). So in order to program fine segment of LUT we
+	 * need to pick every 8'th entry in LUT, and program 256 indexes.
+	 *
+	 * PAL_PREC_INDEX[0] and PAL_PREC_INDEX[1] map to seg2[1],
+	 * with seg2[0] being unused by the hardware.
+	 */
+	I915_WRITE(PREC_PAL_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
+	for (i = 1; i < 257; i++) {
+		entry = &lut[i * 8];
+		I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_ldw(entry));
+		I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_udw(entry));
+	}
+
+	/*
+	 * Program Coarse segment (let's call it seg3)...
+	 *
+	 * Coarse segment's starts from index 0 and it's step is 1/256 ie 0,
+	 * 1/256, 2/256 ...256/256. As per the description of each entry in LUT
+	 * above, we need to pick every (8 * 128)th entry in LUT, and
+	 * program 256 of those.
+	 *
+	 * Spec is not very clear about if entries seg3[0] and seg3[1] are
+	 * being used or not, but we still need to program these to advance
+	 * the index.
+	 */
+	for (i = 0; i < 256; i++) {
+		entry = &lut[i * 8 * 128];
+		I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_ldw(entry));
+		I915_WRITE(PREC_PAL_DATA(pipe), ilk_lut_12p4_udw(entry));
+	}
+
+	/* The last entry in the LUT is to be programmed in GCMAX */
+	entry = &lut[256 * 8 * 128];
+	icl_load_gcmax(crtc_state, entry);
+	ivb_load_lut_ext_max(crtc);
+}
+
+static void icl_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	if (crtc_state->base.degamma_lut)
+		glk_load_degamma_lut(crtc_state);
+
+	switch (crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) {
+	case GAMMA_MODE_MODE_8BIT:
+		i9xx_load_luts(crtc_state);
+		break;
+
+	case GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED:
+		icl_program_gamma_superfine_segment(crtc_state);
+		icl_program_gamma_multi_segment(crtc_state);
+		break;
+
+	default:
+		bdw_load_lut_10(crtc, gamma_lut, PAL_PREC_INDEX_VALUE(0));
+		ivb_load_lut_ext_max(crtc);
+	}
+}
+
+static u32 chv_cgm_degamma_ldw(const struct drm_color_lut *color)
+{
+	return drm_color_lut_extract(color->green, 14) << 16 |
+		drm_color_lut_extract(color->blue, 14);
+}
+
+static u32 chv_cgm_degamma_udw(const struct drm_color_lut *color)
+{
+	return drm_color_lut_extract(color->red, 14);
+}
+
+static void chv_load_cgm_degamma(struct intel_crtc *crtc,
+				 const struct drm_property_blob *blob)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_color_lut *lut = blob->data;
+	int i, lut_size = drm_color_lut_size(blob);
+	enum pipe pipe = crtc->pipe;
+
+	for (i = 0; i < lut_size; i++) {
+		I915_WRITE(CGM_PIPE_DEGAMMA(pipe, i, 0),
+			   chv_cgm_degamma_ldw(&lut[i]));
+		I915_WRITE(CGM_PIPE_DEGAMMA(pipe, i, 1),
+			   chv_cgm_degamma_udw(&lut[i]));
+	}
+}
+
+static u32 chv_cgm_gamma_ldw(const struct drm_color_lut *color)
+{
+	return drm_color_lut_extract(color->green, 10) << 16 |
+		drm_color_lut_extract(color->blue, 10);
+}
+
+static u32 chv_cgm_gamma_udw(const struct drm_color_lut *color)
+{
+	return drm_color_lut_extract(color->red, 10);
+}
+
+static void chv_load_cgm_gamma(struct intel_crtc *crtc,
+			       const struct drm_property_blob *blob)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_color_lut *lut = blob->data;
+	int i, lut_size = drm_color_lut_size(blob);
+	enum pipe pipe = crtc->pipe;
+
+	for (i = 0; i < lut_size; i++) {
+		I915_WRITE(CGM_PIPE_GAMMA(pipe, i, 0),
+			   chv_cgm_gamma_ldw(&lut[i]));
+		I915_WRITE(CGM_PIPE_GAMMA(pipe, i, 1),
+			   chv_cgm_gamma_udw(&lut[i]));
+	}
+}
+
+static void chv_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+	const struct drm_property_blob *degamma_lut = crtc_state->base.degamma_lut;
+
+	cherryview_load_csc_matrix(crtc_state);
+
+	if (crtc_state_is_legacy_gamma(crtc_state)) {
+		i9xx_load_luts(crtc_state);
+		return;
+	}
+
+	if (degamma_lut)
+		chv_load_cgm_degamma(crtc, degamma_lut);
+
+	if (gamma_lut)
+		chv_load_cgm_gamma(crtc, gamma_lut);
+}
+
+void intel_color_load_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	dev_priv->display.load_luts(crtc_state);
+}
+
+void intel_color_commit(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	dev_priv->display.color_commit(crtc_state);
+}
+
+int intel_color_check(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	return dev_priv->display.color_check(crtc_state);
+}
+
+void intel_color_get_config(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	if (dev_priv->display.read_luts)
+		dev_priv->display.read_luts(crtc_state);
+}
+
+static bool need_plane_update(struct intel_plane *plane,
+			      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+
+	/*
+	 * On pre-SKL the pipe gamma enable and pipe csc enable for
+	 * the pipe bottom color are configured via the primary plane.
+	 * We have to reconfigure that even if the plane is inactive.
+	 */
+	return crtc_state->active_planes & BIT(plane->id) ||
+		(INTEL_GEN(dev_priv) < 9 &&
+		 plane->id == PLANE_PRIMARY);
+}
+
+static int
+intel_color_add_affected_planes(struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_atomic_state *state =
+		to_intel_atomic_state(new_crtc_state->base.state);
+	const struct intel_crtc_state *old_crtc_state =
+		intel_atomic_get_old_crtc_state(state, crtc);
+	struct intel_plane *plane;
+
+	if (!new_crtc_state->base.active ||
+	    drm_atomic_crtc_needs_modeset(&new_crtc_state->base))
+		return 0;
+
+	if (new_crtc_state->gamma_enable == old_crtc_state->gamma_enable &&
+	    new_crtc_state->csc_enable == old_crtc_state->csc_enable)
+		return 0;
+
+	for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
+		struct intel_plane_state *plane_state;
+
+		if (!need_plane_update(plane, new_crtc_state))
+			continue;
+
+		plane_state = intel_atomic_get_plane_state(state, plane);
+		if (IS_ERR(plane_state))
+			return PTR_ERR(plane_state);
+
+		new_crtc_state->update_planes |= BIT(plane->id);
+	}
+
+	return 0;
+}
+
+static int check_lut_size(const struct drm_property_blob *lut, int expected)
+{
+	int len;
+
+	if (!lut)
+		return 0;
+
+	len = drm_color_lut_size(lut);
+	if (len != expected) {
+		DRM_DEBUG_KMS("Invalid LUT size; got %d, expected %d\n",
+			      len, expected);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int check_luts(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+	const struct drm_property_blob *degamma_lut = crtc_state->base.degamma_lut;
+	int gamma_length, degamma_length;
+	u32 gamma_tests, degamma_tests;
+
+	/* Always allow legacy gamma LUT with no further checking. */
+	if (crtc_state_is_legacy_gamma(crtc_state))
+		return 0;
+
+	/* C8 relies on its palette being stored in the legacy LUT */
+	if (crtc_state->c8_planes) {
+		DRM_DEBUG_KMS("C8 pixelformat requires the legacy LUT\n");
+		return -EINVAL;
+	}
+
+	degamma_length = INTEL_INFO(dev_priv)->color.degamma_lut_size;
+	gamma_length = INTEL_INFO(dev_priv)->color.gamma_lut_size;
+	degamma_tests = INTEL_INFO(dev_priv)->color.degamma_lut_tests;
+	gamma_tests = INTEL_INFO(dev_priv)->color.gamma_lut_tests;
+
+	if (check_lut_size(degamma_lut, degamma_length) ||
+	    check_lut_size(gamma_lut, gamma_length))
+		return -EINVAL;
+
+	if (drm_color_lut_check(degamma_lut, degamma_tests) ||
+	    drm_color_lut_check(gamma_lut, gamma_tests))
+		return -EINVAL;
+
+	return 0;
+}
+
+static u32 i9xx_gamma_mode(struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable ||
+	    crtc_state_is_legacy_gamma(crtc_state))
+		return GAMMA_MODE_MODE_8BIT;
+	else
+		return GAMMA_MODE_MODE_10BIT; /* i965+ only */
+}
+
+static int i9xx_color_check(struct intel_crtc_state *crtc_state)
+{
+	int ret;
+
+	ret = check_luts(crtc_state);
+	if (ret)
+		return ret;
+
+	crtc_state->gamma_enable =
+		crtc_state->base.gamma_lut &&
+		!crtc_state->c8_planes;
+
+	crtc_state->gamma_mode = i9xx_gamma_mode(crtc_state);
+
+	ret = intel_color_add_affected_planes(crtc_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static u32 chv_cgm_mode(const struct intel_crtc_state *crtc_state)
+{
+	u32 cgm_mode = 0;
+
+	if (crtc_state_is_legacy_gamma(crtc_state))
+		return 0;
+
+	if (crtc_state->base.degamma_lut)
+		cgm_mode |= CGM_PIPE_MODE_DEGAMMA;
+	if (crtc_state->base.ctm)
+		cgm_mode |= CGM_PIPE_MODE_CSC;
+	if (crtc_state->base.gamma_lut)
+		cgm_mode |= CGM_PIPE_MODE_GAMMA;
+
+	return cgm_mode;
+}
+
+/*
+ * CHV color pipeline:
+ * u0.10 -> CGM degamma -> u0.14 -> CGM csc -> u0.14 -> CGM gamma ->
+ * u0.10 -> WGC csc -> u0.10 -> pipe gamma -> u0.10
+ *
+ * We always bypass the WGC csc and use the CGM csc
+ * instead since it has degamma and better precision.
+ */
+static int chv_color_check(struct intel_crtc_state *crtc_state)
+{
+	int ret;
+
+	ret = check_luts(crtc_state);
+	if (ret)
+		return ret;
+
+	/*
+	 * Pipe gamma will be used only for the legacy LUT.
+	 * Otherwise we bypass it and use the CGM gamma instead.
+	 */
+	crtc_state->gamma_enable =
+		crtc_state_is_legacy_gamma(crtc_state) &&
+		!crtc_state->c8_planes;
+
+	crtc_state->gamma_mode = GAMMA_MODE_MODE_8BIT;
+
+	crtc_state->cgm_mode = chv_cgm_mode(crtc_state);
+
+	ret = intel_color_add_affected_planes(crtc_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static u32 ilk_gamma_mode(const struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable ||
+	    crtc_state_is_legacy_gamma(crtc_state))
+		return GAMMA_MODE_MODE_8BIT;
+	else
+		return GAMMA_MODE_MODE_10BIT;
+}
+
+static int ilk_color_check(struct intel_crtc_state *crtc_state)
+{
+	int ret;
+
+	ret = check_luts(crtc_state);
+	if (ret)
+		return ret;
+
+	crtc_state->gamma_enable =
+		crtc_state->base.gamma_lut &&
+		!crtc_state->c8_planes;
+
+	/*
+	 * We don't expose the ctm on ilk/snb currently,
+	 * nor do we enable YCbCr output. Also RGB limited
+	 * range output is handled by the hw automagically.
+	 */
+	crtc_state->csc_enable = false;
+
+	crtc_state->gamma_mode = ilk_gamma_mode(crtc_state);
+
+	crtc_state->csc_mode = 0;
+
+	ret = intel_color_add_affected_planes(crtc_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static u32 ivb_gamma_mode(const struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable ||
+	    crtc_state_is_legacy_gamma(crtc_state))
+		return GAMMA_MODE_MODE_8BIT;
+	else if (crtc_state->base.gamma_lut &&
+		 crtc_state->base.degamma_lut)
+		return GAMMA_MODE_MODE_SPLIT;
+	else
+		return GAMMA_MODE_MODE_10BIT;
+}
+
+static u32 ivb_csc_mode(const struct intel_crtc_state *crtc_state)
+{
+	bool limited_color_range = ilk_csc_limited_range(crtc_state);
+
+	/*
+	 * CSC comes after the LUT in degamma, RGB->YCbCr,
+	 * and RGB full->limited range mode.
+	 */
+	if (crtc_state->base.degamma_lut ||
+	    crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB ||
+	    limited_color_range)
+		return 0;
+
+	return CSC_POSITION_BEFORE_GAMMA;
+}
+
+static int ivb_color_check(struct intel_crtc_state *crtc_state)
+{
+	bool limited_color_range = ilk_csc_limited_range(crtc_state);
+	int ret;
+
+	ret = check_luts(crtc_state);
+	if (ret)
+		return ret;
+
+	crtc_state->gamma_enable =
+		(crtc_state->base.gamma_lut ||
+		 crtc_state->base.degamma_lut) &&
+		!crtc_state->c8_planes;
+
+	crtc_state->csc_enable =
+		crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB ||
+		crtc_state->base.ctm || limited_color_range;
+
+	crtc_state->gamma_mode = ivb_gamma_mode(crtc_state);
+
+	crtc_state->csc_mode = ivb_csc_mode(crtc_state);
+
+	ret = intel_color_add_affected_planes(crtc_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static u32 glk_gamma_mode(const struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable ||
+	    crtc_state_is_legacy_gamma(crtc_state))
+		return GAMMA_MODE_MODE_8BIT;
+	else
+		return GAMMA_MODE_MODE_10BIT;
+}
+
+static int glk_color_check(struct intel_crtc_state *crtc_state)
+{
+	int ret;
+
+	ret = check_luts(crtc_state);
+	if (ret)
+		return ret;
+
+	crtc_state->gamma_enable =
+		crtc_state->base.gamma_lut &&
+		!crtc_state->c8_planes;
+
+	/* On GLK+ degamma LUT is controlled by csc_enable */
+	crtc_state->csc_enable =
+		crtc_state->base.degamma_lut ||
+		crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB ||
+		crtc_state->base.ctm || crtc_state->limited_color_range;
+
+	crtc_state->gamma_mode = glk_gamma_mode(crtc_state);
+
+	crtc_state->csc_mode = 0;
+
+	ret = intel_color_add_affected_planes(crtc_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
+{
+	u32 gamma_mode = 0;
+
+	if (crtc_state->base.degamma_lut)
+		gamma_mode |= PRE_CSC_GAMMA_ENABLE;
+
+	if (crtc_state->base.gamma_lut &&
+	    !crtc_state->c8_planes)
+		gamma_mode |= POST_CSC_GAMMA_ENABLE;
+
+	if (!crtc_state->base.gamma_lut ||
+	    crtc_state_is_legacy_gamma(crtc_state))
+		gamma_mode |= GAMMA_MODE_MODE_8BIT;
+	else
+		gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
+
+	return gamma_mode;
+}
+
+static u32 icl_csc_mode(const struct intel_crtc_state *crtc_state)
+{
+	u32 csc_mode = 0;
+
+	if (crtc_state->base.ctm)
+		csc_mode |= ICL_CSC_ENABLE;
+
+	if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB ||
+	    crtc_state->limited_color_range)
+		csc_mode |= ICL_OUTPUT_CSC_ENABLE;
+
+	return csc_mode;
+}
+
+static int icl_color_check(struct intel_crtc_state *crtc_state)
+{
+	int ret;
+
+	ret = check_luts(crtc_state);
+	if (ret)
+		return ret;
+
+	crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
+
+	crtc_state->csc_mode = icl_csc_mode(crtc_state);
+
+	return 0;
+}
+
+void intel_color_init(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	bool has_ctm = INTEL_INFO(dev_priv)->color.degamma_lut_size != 0;
+
+	drm_mode_crtc_set_gamma_size(&crtc->base, 256);
+
+	if (HAS_GMCH(dev_priv)) {
+		if (IS_CHERRYVIEW(dev_priv)) {
+			dev_priv->display.color_check = chv_color_check;
+			dev_priv->display.color_commit = i9xx_color_commit;
+			dev_priv->display.load_luts = chv_load_luts;
+		} else if (INTEL_GEN(dev_priv) >= 4) {
+			dev_priv->display.color_check = i9xx_color_check;
+			dev_priv->display.color_commit = i9xx_color_commit;
+			dev_priv->display.load_luts = i965_load_luts;
+		} else {
+			dev_priv->display.color_check = i9xx_color_check;
+			dev_priv->display.color_commit = i9xx_color_commit;
+			dev_priv->display.load_luts = i9xx_load_luts;
+		}
+	} else {
+		if (INTEL_GEN(dev_priv) >= 11)
+			dev_priv->display.color_check = icl_color_check;
+		else if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+			dev_priv->display.color_check = glk_color_check;
+		else if (INTEL_GEN(dev_priv) >= 7)
+			dev_priv->display.color_check = ivb_color_check;
+		else
+			dev_priv->display.color_check = ilk_color_check;
+
+		if (INTEL_GEN(dev_priv) >= 9)
+			dev_priv->display.color_commit = skl_color_commit;
+		else if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+			dev_priv->display.color_commit = hsw_color_commit;
+		else
+			dev_priv->display.color_commit = ilk_color_commit;
+
+		if (INTEL_GEN(dev_priv) >= 11)
+			dev_priv->display.load_luts = icl_load_luts;
+		else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+			dev_priv->display.load_luts = glk_load_luts;
+		else if (INTEL_GEN(dev_priv) >= 8)
+			dev_priv->display.load_luts = bdw_load_luts;
+		else if (INTEL_GEN(dev_priv) >= 7)
+			dev_priv->display.load_luts = ivb_load_luts;
+		else
+			dev_priv->display.load_luts = ilk_load_luts;
+	}
+
+	drm_crtc_enable_color_mgmt(&crtc->base,
+				   INTEL_INFO(dev_priv)->color.degamma_lut_size,
+				   has_ctm,
+				   INTEL_INFO(dev_priv)->color.gamma_lut_size);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_color.h b/drivers/gpu/drm/i915/display/intel_color.h
new file mode 100644
index 000000000000..057e8ac63555
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_color.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_COLOR_H__
+#define __INTEL_COLOR_H__
+
+struct intel_crtc_state;
+struct intel_crtc;
+
+void intel_color_init(struct intel_crtc *crtc);
+int intel_color_check(struct intel_crtc_state *crtc_state);
+void intel_color_commit(const struct intel_crtc_state *crtc_state);
+void intel_color_load_luts(const struct intel_crtc_state *crtc_state);
+void intel_color_get_config(struct intel_crtc_state *crtc_state);
+
+#endif /* __INTEL_COLOR_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
new file mode 100644
index 000000000000..841708da5a56
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -0,0 +1,334 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2018 Intel Corporation
+ */
+
+#include "intel_combo_phy.h"
+#include "intel_drv.h"
+
+#define for_each_combo_port(__dev_priv, __port) \
+	for ((__port) = PORT_A; (__port) < I915_MAX_PORTS; (__port)++)	\
+		for_each_if(intel_port_is_combophy(__dev_priv, __port))
+
+#define for_each_combo_port_reverse(__dev_priv, __port) \
+	for ((__port) = I915_MAX_PORTS; (__port)-- > PORT_A;) \
+		for_each_if(intel_port_is_combophy(__dev_priv, __port))
+
+enum {
+	PROCMON_0_85V_DOT_0,
+	PROCMON_0_95V_DOT_0,
+	PROCMON_0_95V_DOT_1,
+	PROCMON_1_05V_DOT_0,
+	PROCMON_1_05V_DOT_1,
+};
+
+static const struct cnl_procmon {
+	u32 dw1, dw9, dw10;
+} cnl_procmon_values[] = {
+	[PROCMON_0_85V_DOT_0] =
+		{ .dw1 = 0x00000000, .dw9 = 0x62AB67BB, .dw10 = 0x51914F96, },
+	[PROCMON_0_95V_DOT_0] =
+		{ .dw1 = 0x00000000, .dw9 = 0x86E172C7, .dw10 = 0x77CA5EAB, },
+	[PROCMON_0_95V_DOT_1] =
+		{ .dw1 = 0x00000000, .dw9 = 0x93F87FE1, .dw10 = 0x8AE871C5, },
+	[PROCMON_1_05V_DOT_0] =
+		{ .dw1 = 0x00000000, .dw9 = 0x98FA82DD, .dw10 = 0x89E46DC1, },
+	[PROCMON_1_05V_DOT_1] =
+		{ .dw1 = 0x00440000, .dw9 = 0x9A00AB25, .dw10 = 0x8AE38FF1, },
+};
+
+/*
+ * CNL has just one set of registers, while ICL has two sets: one for port A and
+ * the other for port B. The CNL registers are equivalent to the ICL port A
+ * registers, that's why we call the ICL macros even though the function has CNL
+ * on its name.
+ */
+static const struct cnl_procmon *
+cnl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum port port)
+{
+	const struct cnl_procmon *procmon;
+	u32 val;
+
+	val = I915_READ(ICL_PORT_COMP_DW3(port));
+	switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {
+	default:
+		MISSING_CASE(val);
+		/* fall through */
+	case VOLTAGE_INFO_0_85V | PROCESS_INFO_DOT_0:
+		procmon = &cnl_procmon_values[PROCMON_0_85V_DOT_0];
+		break;
+	case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_0:
+		procmon = &cnl_procmon_values[PROCMON_0_95V_DOT_0];
+		break;
+	case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_1:
+		procmon = &cnl_procmon_values[PROCMON_0_95V_DOT_1];
+		break;
+	case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_0:
+		procmon = &cnl_procmon_values[PROCMON_1_05V_DOT_0];
+		break;
+	case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_1:
+		procmon = &cnl_procmon_values[PROCMON_1_05V_DOT_1];
+		break;
+	}
+
+	return procmon;
+}
+
+static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv,
+				       enum port port)
+{
+	const struct cnl_procmon *procmon;
+	u32 val;
+
+	procmon = cnl_get_procmon_ref_values(dev_priv, port);
+
+	val = I915_READ(ICL_PORT_COMP_DW1(port));
+	val &= ~((0xff << 16) | 0xff);
+	val |= procmon->dw1;
+	I915_WRITE(ICL_PORT_COMP_DW1(port), val);
+
+	I915_WRITE(ICL_PORT_COMP_DW9(port), procmon->dw9);
+	I915_WRITE(ICL_PORT_COMP_DW10(port), procmon->dw10);
+}
+
+static bool check_phy_reg(struct drm_i915_private *dev_priv,
+			  enum port port, i915_reg_t reg, u32 mask,
+			  u32 expected_val)
+{
+	u32 val = I915_READ(reg);
+
+	if ((val & mask) != expected_val) {
+		DRM_DEBUG_DRIVER("Port %c combo PHY reg %08x state mismatch: "
+				 "current %08x mask %08x expected %08x\n",
+				 port_name(port),
+				 reg.reg, val, mask, expected_val);
+		return false;
+	}
+
+	return true;
+}
+
+static bool cnl_verify_procmon_ref_values(struct drm_i915_private *dev_priv,
+					  enum port port)
+{
+	const struct cnl_procmon *procmon;
+	bool ret;
+
+	procmon = cnl_get_procmon_ref_values(dev_priv, port);
+
+	ret = check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW1(port),
+			    (0xff << 16) | 0xff, procmon->dw1);
+	ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW9(port),
+			     -1U, procmon->dw9);
+	ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW10(port),
+			     -1U, procmon->dw10);
+
+	return ret;
+}
+
+static bool cnl_combo_phy_enabled(struct drm_i915_private *dev_priv)
+{
+	return !(I915_READ(CHICKEN_MISC_2) & CNL_COMP_PWR_DOWN) &&
+		(I915_READ(CNL_PORT_COMP_DW0) & COMP_INIT);
+}
+
+static bool cnl_combo_phy_verify_state(struct drm_i915_private *dev_priv)
+{
+	enum port port = PORT_A;
+	bool ret;
+
+	if (!cnl_combo_phy_enabled(dev_priv))
+		return false;
+
+	ret = cnl_verify_procmon_ref_values(dev_priv, port);
+
+	ret &= check_phy_reg(dev_priv, port, CNL_PORT_CL1CM_DW5,
+			     CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);
+
+	return ret;
+}
+
+static void cnl_combo_phys_init(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = I915_READ(CHICKEN_MISC_2);
+	val &= ~CNL_COMP_PWR_DOWN;
+	I915_WRITE(CHICKEN_MISC_2, val);
+
+	/* Dummy PORT_A to get the correct CNL register from the ICL macro */
+	cnl_set_procmon_ref_values(dev_priv, PORT_A);
+
+	val = I915_READ(CNL_PORT_COMP_DW0);
+	val |= COMP_INIT;
+	I915_WRITE(CNL_PORT_COMP_DW0, val);
+
+	val = I915_READ(CNL_PORT_CL1CM_DW5);
+	val |= CL_POWER_DOWN_ENABLE;
+	I915_WRITE(CNL_PORT_CL1CM_DW5, val);
+}
+
+static void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	if (!cnl_combo_phy_verify_state(dev_priv))
+		DRM_WARN("Combo PHY HW state changed unexpectedly.\n");
+
+	val = I915_READ(CHICKEN_MISC_2);
+	val |= CNL_COMP_PWR_DOWN;
+	I915_WRITE(CHICKEN_MISC_2, val);
+}
+
+static bool icl_combo_phy_enabled(struct drm_i915_private *dev_priv,
+				  enum port port)
+{
+	return !(I915_READ(ICL_PHY_MISC(port)) &
+		 ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN) &&
+		(I915_READ(ICL_PORT_COMP_DW0(port)) & COMP_INIT);
+}
+
+static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
+				       enum port port)
+{
+	bool ret;
+
+	if (!icl_combo_phy_enabled(dev_priv, port))
+		return false;
+
+	ret = cnl_verify_procmon_ref_values(dev_priv, port);
+
+	if (port == PORT_A)
+		ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW8(port),
+				     IREFGEN, IREFGEN);
+
+	ret &= check_phy_reg(dev_priv, port, ICL_PORT_CL_DW5(port),
+			     CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);
+
+	return ret;
+}
+
+void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
+				    enum port port, bool is_dsi,
+				    int lane_count, bool lane_reversal)
+{
+	u8 lane_mask;
+	u32 val;
+
+	if (is_dsi) {
+		WARN_ON(lane_reversal);
+
+		switch (lane_count) {
+		case 1:
+			lane_mask = PWR_DOWN_LN_3_1_0;
+			break;
+		case 2:
+			lane_mask = PWR_DOWN_LN_3_1;
+			break;
+		case 3:
+			lane_mask = PWR_DOWN_LN_3;
+			break;
+		default:
+			MISSING_CASE(lane_count);
+			/* fall-through */
+		case 4:
+			lane_mask = PWR_UP_ALL_LANES;
+			break;
+		}
+	} else {
+		switch (lane_count) {
+		case 1:
+			lane_mask = lane_reversal ? PWR_DOWN_LN_2_1_0 :
+						    PWR_DOWN_LN_3_2_1;
+			break;
+		case 2:
+			lane_mask = lane_reversal ? PWR_DOWN_LN_1_0 :
+						    PWR_DOWN_LN_3_2;
+			break;
+		default:
+			MISSING_CASE(lane_count);
+			/* fall-through */
+		case 4:
+			lane_mask = PWR_UP_ALL_LANES;
+			break;
+		}
+	}
+
+	val = I915_READ(ICL_PORT_CL_DW10(port));
+	val &= ~PWR_DOWN_LN_MASK;
+	val |= lane_mask << PWR_DOWN_LN_SHIFT;
+	I915_WRITE(ICL_PORT_CL_DW10(port), val);
+}
+
+static void icl_combo_phys_init(struct drm_i915_private *dev_priv)
+{
+	enum port port;
+
+	for_each_combo_port(dev_priv, port) {
+		u32 val;
+
+		if (icl_combo_phy_verify_state(dev_priv, port)) {
+			DRM_DEBUG_DRIVER("Port %c combo PHY already enabled, won't reprogram it.\n",
+					 port_name(port));
+			continue;
+		}
+
+		val = I915_READ(ICL_PHY_MISC(port));
+		val &= ~ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
+		I915_WRITE(ICL_PHY_MISC(port), val);
+
+		cnl_set_procmon_ref_values(dev_priv, port);
+
+		if (port == PORT_A) {
+			val = I915_READ(ICL_PORT_COMP_DW8(port));
+			val |= IREFGEN;
+			I915_WRITE(ICL_PORT_COMP_DW8(port), val);
+		}
+
+		val = I915_READ(ICL_PORT_COMP_DW0(port));
+		val |= COMP_INIT;
+		I915_WRITE(ICL_PORT_COMP_DW0(port), val);
+
+		val = I915_READ(ICL_PORT_CL_DW5(port));
+		val |= CL_POWER_DOWN_ENABLE;
+		I915_WRITE(ICL_PORT_CL_DW5(port), val);
+	}
+}
+
+static void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
+{
+	enum port port;
+
+	for_each_combo_port_reverse(dev_priv, port) {
+		u32 val;
+
+		if (port == PORT_A &&
+		    !icl_combo_phy_verify_state(dev_priv, port))
+			DRM_WARN("Port %c combo PHY HW state changed unexpectedly\n",
+				 port_name(port));
+
+		val = I915_READ(ICL_PHY_MISC(port));
+		val |= ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
+		I915_WRITE(ICL_PHY_MISC(port), val);
+
+		val = I915_READ(ICL_PORT_COMP_DW0(port));
+		val &= ~COMP_INIT;
+		I915_WRITE(ICL_PORT_COMP_DW0(port), val);
+	}
+}
+
+void intel_combo_phy_init(struct drm_i915_private *i915)
+{
+	if (INTEL_GEN(i915) >= 11)
+		icl_combo_phys_init(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_combo_phys_init(i915);
+}
+
+void intel_combo_phy_uninit(struct drm_i915_private *i915)
+{
+	if (INTEL_GEN(i915) >= 11)
+		icl_combo_phys_uninit(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_combo_phys_uninit(i915);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.h b/drivers/gpu/drm/i915/display/intel_combo_phy.h
new file mode 100644
index 000000000000..e6e195a83b19
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_COMBO_PHY_H__
+#define __INTEL_COMBO_PHY_H__
+
+#include <linux/types.h>
+#include <drm/i915_drm.h>
+
+struct drm_i915_private;
+
+void intel_combo_phy_init(struct drm_i915_private *dev_priv);
+void intel_combo_phy_uninit(struct drm_i915_private *dev_priv);
+void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
+				    enum port port, bool is_dsi,
+				    int lane_count, bool lane_reversal);
+
+#endif /* __INTEL_COMBO_PHY_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu/drm/i915/display/intel_connector.c
new file mode 100644
index 000000000000..41310f8e5a2a
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_connector.c
@@ -0,0 +1,283 @@
+/*
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ * Copyright (c) 2007, 2010 Intel Corporation
+ *   Jesse Barnes <jesse.barnes@intel.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+
+#include "display/intel_panel.h"
+
+#include "i915_drv.h"
+#include "intel_connector.h"
+#include "intel_drv.h"
+#include "intel_hdcp.h"
+
+int intel_connector_init(struct intel_connector *connector)
+{
+	struct intel_digital_connector_state *conn_state;
+
+	/*
+	 * Allocate enough memory to hold intel_digital_connector_state,
+	 * This might be a few bytes too many, but for connectors that don't
+	 * need it we'll free the state and allocate a smaller one on the first
+	 * successful commit anyway.
+	 */
+	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
+	if (!conn_state)
+		return -ENOMEM;
+
+	__drm_atomic_helper_connector_reset(&connector->base,
+					    &conn_state->base);
+
+	return 0;
+}
+
+struct intel_connector *intel_connector_alloc(void)
+{
+	struct intel_connector *connector;
+
+	connector = kzalloc(sizeof(*connector), GFP_KERNEL);
+	if (!connector)
+		return NULL;
+
+	if (intel_connector_init(connector) < 0) {
+		kfree(connector);
+		return NULL;
+	}
+
+	return connector;
+}
+
+/*
+ * Free the bits allocated by intel_connector_alloc.
+ * This should only be used after intel_connector_alloc has returned
+ * successfully, and before drm_connector_init returns successfully.
+ * Otherwise the destroy callbacks for the connector and the state should
+ * take care of proper cleanup/free (see intel_connector_destroy).
+ */
+void intel_connector_free(struct intel_connector *connector)
+{
+	kfree(to_intel_digital_connector_state(connector->base.state));
+	kfree(connector);
+}
+
+/*
+ * Connector type independent destroy hook for drm_connector_funcs.
+ */
+void intel_connector_destroy(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	kfree(intel_connector->detect_edid);
+
+	intel_hdcp_cleanup(intel_connector);
+
+	if (!IS_ERR_OR_NULL(intel_connector->edid))
+		kfree(intel_connector->edid);
+
+	intel_panel_fini(&intel_connector->panel);
+
+	drm_connector_cleanup(connector);
+
+	if (intel_connector->port)
+		drm_dp_mst_put_port_malloc(intel_connector->port);
+
+	kfree(connector);
+}
+
+int intel_connector_register(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+	int ret;
+
+	ret = intel_backlight_device_register(intel_connector);
+	if (ret)
+		goto err;
+
+	if (i915_inject_load_failure()) {
+		ret = -EFAULT;
+		goto err_backlight;
+	}
+
+	return 0;
+
+err_backlight:
+	intel_backlight_device_unregister(intel_connector);
+err:
+	return ret;
+}
+
+void intel_connector_unregister(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	intel_backlight_device_unregister(intel_connector);
+}
+
+void intel_connector_attach_encoder(struct intel_connector *connector,
+				    struct intel_encoder *encoder)
+{
+	connector->encoder = encoder;
+	drm_connector_attach_encoder(&connector->base, &encoder->base);
+}
+
+/*
+ * Simple connector->get_hw_state implementation for encoders that support only
+ * one connector and no cloning and hence the encoder state determines the state
+ * of the connector.
+ */
+bool intel_connector_get_hw_state(struct intel_connector *connector)
+{
+	enum pipe pipe = 0;
+	struct intel_encoder *encoder = connector->encoder;
+
+	return encoder->get_hw_state(encoder, &pipe);
+}
+
+enum pipe intel_connector_get_pipe(struct intel_connector *connector)
+{
+	struct drm_device *dev = connector->base.dev;
+
+	WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
+
+	if (!connector->base.state->crtc)
+		return INVALID_PIPE;
+
+	return to_intel_crtc(connector->base.state->crtc)->pipe;
+}
+
+/**
+ * intel_connector_update_modes - update connector from edid
+ * @connector: DRM connector device to use
+ * @edid: previously read EDID information
+ */
+int intel_connector_update_modes(struct drm_connector *connector,
+				struct edid *edid)
+{
+	int ret;
+
+	drm_connector_update_edid_property(connector, edid);
+	ret = drm_add_edid_modes(connector, edid);
+
+	return ret;
+}
+
+/**
+ * intel_ddc_get_modes - get modelist from monitor
+ * @connector: DRM connector device to use
+ * @adapter: i2c adapter
+ *
+ * Fetch the EDID information from @connector using the DDC bus.
+ */
+int intel_ddc_get_modes(struct drm_connector *connector,
+			struct i2c_adapter *adapter)
+{
+	struct edid *edid;
+	int ret;
+
+	edid = drm_get_edid(connector, adapter);
+	if (!edid)
+		return 0;
+
+	ret = intel_connector_update_modes(connector, edid);
+	kfree(edid);
+
+	return ret;
+}
+
+static const struct drm_prop_enum_list force_audio_names[] = {
+	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
+	{ HDMI_AUDIO_OFF, "off" },
+	{ HDMI_AUDIO_AUTO, "auto" },
+	{ HDMI_AUDIO_ON, "on" },
+};
+
+void
+intel_attach_force_audio_property(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_property *prop;
+
+	prop = dev_priv->force_audio_property;
+	if (prop == NULL) {
+		prop = drm_property_create_enum(dev, 0,
+					   "audio",
+					   force_audio_names,
+					   ARRAY_SIZE(force_audio_names));
+		if (prop == NULL)
+			return;
+
+		dev_priv->force_audio_property = prop;
+	}
+	drm_object_attach_property(&connector->base, prop, 0);
+}
+
+static const struct drm_prop_enum_list broadcast_rgb_names[] = {
+	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
+	{ INTEL_BROADCAST_RGB_FULL, "Full" },
+	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
+};
+
+void
+intel_attach_broadcast_rgb_property(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_property *prop;
+
+	prop = dev_priv->broadcast_rgb_property;
+	if (prop == NULL) {
+		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
+					   "Broadcast RGB",
+					   broadcast_rgb_names,
+					   ARRAY_SIZE(broadcast_rgb_names));
+		if (prop == NULL)
+			return;
+
+		dev_priv->broadcast_rgb_property = prop;
+	}
+
+	drm_object_attach_property(&connector->base, prop, 0);
+}
+
+void
+intel_attach_aspect_ratio_property(struct drm_connector *connector)
+{
+	if (!drm_mode_create_aspect_ratio_property(connector->dev))
+		drm_object_attach_property(&connector->base,
+			connector->dev->mode_config.aspect_ratio_property,
+			DRM_MODE_PICTURE_ASPECT_NONE);
+}
+
+void
+intel_attach_colorspace_property(struct drm_connector *connector)
+{
+	if (!drm_mode_create_colorspace_property(connector))
+		drm_object_attach_property(&connector->base,
+					   connector->colorspace_property, 0);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_connector.h b/drivers/gpu/drm/i915/display/intel_connector.h
new file mode 100644
index 000000000000..93a7375c8196
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_connector.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_CONNECTOR_H__
+#define __INTEL_CONNECTOR_H__
+
+#include "intel_display.h"
+
+struct drm_connector;
+struct edid;
+struct i2c_adapter;
+struct intel_connector;
+struct intel_encoder;
+
+int intel_connector_init(struct intel_connector *connector);
+struct intel_connector *intel_connector_alloc(void);
+void intel_connector_free(struct intel_connector *connector);
+void intel_connector_destroy(struct drm_connector *connector);
+int intel_connector_register(struct drm_connector *connector);
+void intel_connector_unregister(struct drm_connector *connector);
+void intel_connector_attach_encoder(struct intel_connector *connector,
+				    struct intel_encoder *encoder);
+bool intel_connector_get_hw_state(struct intel_connector *connector);
+enum pipe intel_connector_get_pipe(struct intel_connector *connector);
+int intel_connector_update_modes(struct drm_connector *connector,
+				 struct edid *edid);
+int intel_ddc_get_modes(struct drm_connector *c, struct i2c_adapter *adapter);
+void intel_attach_force_audio_property(struct drm_connector *connector);
+void intel_attach_broadcast_rgb_property(struct drm_connector *connector);
+void intel_attach_aspect_ratio_property(struct drm_connector *connector);
+void intel_attach_colorspace_property(struct drm_connector *connector);
+
+#endif /* __INTEL_CONNECTOR_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
new file mode 100644
index 000000000000..8d7e4c8b60bc
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -0,0 +1,17119 @@
+/*
+ * Copyright © 2006-2007 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *	Eric Anholt <eric@anholt.net>
+ */
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/intel-iommu.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/reservation.h>
+#include <linux/slab.h>
+#include <linux/vgaarb.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_rect.h>
+#include <drm/i915_drm.h>
+
+#include "display/intel_crt.h"
+#include "display/intel_ddi.h"
+#include "display/intel_dp.h"
+#include "display/intel_dsi.h"
+#include "display/intel_dvo.h"
+#include "display/intel_gmbus.h"
+#include "display/intel_hdmi.h"
+#include "display/intel_lvds.h"
+#include "display/intel_sdvo.h"
+#include "display/intel_tv.h"
+#include "display/intel_vdsc.h"
+
+#include "i915_drv.h"
+#include "i915_trace.h"
+#include "intel_acpi.h"
+#include "intel_atomic.h"
+#include "intel_atomic_plane.h"
+#include "intel_bw.h"
+#include "intel_color.h"
+#include "intel_cdclk.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
+#include "intel_fbdev.h"
+#include "intel_fifo_underrun.h"
+#include "intel_frontbuffer.h"
+#include "intel_hdcp.h"
+#include "intel_hotplug.h"
+#include "intel_overlay.h"
+#include "intel_pipe_crc.h"
+#include "intel_pm.h"
+#include "intel_psr.h"
+#include "intel_quirks.h"
+#include "intel_sideband.h"
+#include "intel_sprite.h"
+
+/* Primary plane formats for gen <= 3 */
+static const u32 i8xx_primary_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB1555,
+	DRM_FORMAT_XRGB8888,
+};
+
+/* Primary plane formats for gen >= 4 */
+static const u32 i965_primary_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+};
+
+static const u64 i9xx_format_modifiers[] = {
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+/* Cursor formats */
+static const u32 intel_cursor_formats[] = {
+	DRM_FORMAT_ARGB8888,
+};
+
+static const u64 cursor_format_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
+				struct intel_crtc_state *pipe_config);
+static void ironlake_pch_clock_get(struct intel_crtc *crtc,
+				   struct intel_crtc_state *pipe_config);
+
+static int intel_framebuffer_init(struct intel_framebuffer *ifb,
+				  struct drm_i915_gem_object *obj,
+				  struct drm_mode_fb_cmd2 *mode_cmd);
+static void intel_set_pipe_timings(const struct intel_crtc_state *crtc_state);
+static void intel_set_pipe_src_size(const struct intel_crtc_state *crtc_state);
+static void intel_cpu_transcoder_set_m_n(const struct intel_crtc_state *crtc_state,
+					 const struct intel_link_m_n *m_n,
+					 const struct intel_link_m_n *m2_n2);
+static void i9xx_set_pipeconf(const struct intel_crtc_state *crtc_state);
+static void ironlake_set_pipeconf(const struct intel_crtc_state *crtc_state);
+static void haswell_set_pipeconf(const struct intel_crtc_state *crtc_state);
+static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state);
+static void vlv_prepare_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *pipe_config);
+static void chv_prepare_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *pipe_config);
+static void intel_begin_crtc_commit(struct intel_atomic_state *, struct intel_crtc *);
+static void intel_finish_crtc_commit(struct intel_atomic_state *, struct intel_crtc *);
+static void intel_crtc_init_scalers(struct intel_crtc *crtc,
+				    struct intel_crtc_state *crtc_state);
+static void skylake_pfit_enable(const struct intel_crtc_state *crtc_state);
+static void ironlake_pfit_disable(const struct intel_crtc_state *old_crtc_state);
+static void ironlake_pfit_enable(const struct intel_crtc_state *crtc_state);
+static void intel_modeset_setup_hw_state(struct drm_device *dev,
+					 struct drm_modeset_acquire_ctx *ctx);
+static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
+
+struct intel_limit {
+	struct {
+		int min, max;
+	} dot, vco, n, m, m1, m2, p, p1;
+
+	struct {
+		int dot_limit;
+		int p2_slow, p2_fast;
+	} p2;
+};
+
+/* returns HPLL frequency in kHz */
+int vlv_get_hpll_vco(struct drm_i915_private *dev_priv)
+{
+	int hpll_freq, vco_freq[] = { 800, 1600, 2000, 2400 };
+
+	/* Obtain SKU information */
+	hpll_freq = vlv_cck_read(dev_priv, CCK_FUSE_REG) &
+		CCK_FUSE_HPLL_FREQ_MASK;
+
+	return vco_freq[hpll_freq] * 1000;
+}
+
+int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
+		      const char *name, u32 reg, int ref_freq)
+{
+	u32 val;
+	int divider;
+
+	val = vlv_cck_read(dev_priv, reg);
+	divider = val & CCK_FREQUENCY_VALUES;
+
+	WARN((val & CCK_FREQUENCY_STATUS) !=
+	     (divider << CCK_FREQUENCY_STATUS_SHIFT),
+	     "%s change in progress\n", name);
+
+	return DIV_ROUND_CLOSEST(ref_freq << 1, divider + 1);
+}
+
+int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
+			   const char *name, u32 reg)
+{
+	int hpll;
+
+	vlv_cck_get(dev_priv);
+
+	if (dev_priv->hpll_freq == 0)
+		dev_priv->hpll_freq = vlv_get_hpll_vco(dev_priv);
+
+	hpll = vlv_get_cck_clock(dev_priv, name, reg, dev_priv->hpll_freq);
+
+	vlv_cck_put(dev_priv);
+
+	return hpll;
+}
+
+static void intel_update_czclk(struct drm_i915_private *dev_priv)
+{
+	if (!(IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)))
+		return;
+
+	dev_priv->czclk_freq = vlv_get_cck_clock_hpll(dev_priv, "czclk",
+						      CCK_CZ_CLOCK_CONTROL);
+
+	DRM_DEBUG_DRIVER("CZ clock rate: %d kHz\n", dev_priv->czclk_freq);
+}
+
+static inline u32 /* units of 100MHz */
+intel_fdi_link_freq(struct drm_i915_private *dev_priv,
+		    const struct intel_crtc_state *pipe_config)
+{
+	if (HAS_DDI(dev_priv))
+		return pipe_config->port_clock; /* SPLL */
+	else
+		return dev_priv->fdi_pll_freq;
+}
+
+static const struct intel_limit intel_limits_i8xx_dac = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 908000, .max = 1512000 },
+	.n = { .min = 2, .max = 16 },
+	.m = { .min = 96, .max = 140 },
+	.m1 = { .min = 18, .max = 26 },
+	.m2 = { .min = 6, .max = 16 },
+	.p = { .min = 4, .max = 128 },
+	.p1 = { .min = 2, .max = 33 },
+	.p2 = { .dot_limit = 165000,
+		.p2_slow = 4, .p2_fast = 2 },
+};
+
+static const struct intel_limit intel_limits_i8xx_dvo = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 908000, .max = 1512000 },
+	.n = { .min = 2, .max = 16 },
+	.m = { .min = 96, .max = 140 },
+	.m1 = { .min = 18, .max = 26 },
+	.m2 = { .min = 6, .max = 16 },
+	.p = { .min = 4, .max = 128 },
+	.p1 = { .min = 2, .max = 33 },
+	.p2 = { .dot_limit = 165000,
+		.p2_slow = 4, .p2_fast = 4 },
+};
+
+static const struct intel_limit intel_limits_i8xx_lvds = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 908000, .max = 1512000 },
+	.n = { .min = 2, .max = 16 },
+	.m = { .min = 96, .max = 140 },
+	.m1 = { .min = 18, .max = 26 },
+	.m2 = { .min = 6, .max = 16 },
+	.p = { .min = 4, .max = 128 },
+	.p1 = { .min = 1, .max = 6 },
+	.p2 = { .dot_limit = 165000,
+		.p2_slow = 14, .p2_fast = 7 },
+};
+
+static const struct intel_limit intel_limits_i9xx_sdvo = {
+	.dot = { .min = 20000, .max = 400000 },
+	.vco = { .min = 1400000, .max = 2800000 },
+	.n = { .min = 1, .max = 6 },
+	.m = { .min = 70, .max = 120 },
+	.m1 = { .min = 8, .max = 18 },
+	.m2 = { .min = 3, .max = 7 },
+	.p = { .min = 5, .max = 80 },
+	.p1 = { .min = 1, .max = 8 },
+	.p2 = { .dot_limit = 200000,
+		.p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit intel_limits_i9xx_lvds = {
+	.dot = { .min = 20000, .max = 400000 },
+	.vco = { .min = 1400000, .max = 2800000 },
+	.n = { .min = 1, .max = 6 },
+	.m = { .min = 70, .max = 120 },
+	.m1 = { .min = 8, .max = 18 },
+	.m2 = { .min = 3, .max = 7 },
+	.p = { .min = 7, .max = 98 },
+	.p1 = { .min = 1, .max = 8 },
+	.p2 = { .dot_limit = 112000,
+		.p2_slow = 14, .p2_fast = 7 },
+};
+
+
+static const struct intel_limit intel_limits_g4x_sdvo = {
+	.dot = { .min = 25000, .max = 270000 },
+	.vco = { .min = 1750000, .max = 3500000},
+	.n = { .min = 1, .max = 4 },
+	.m = { .min = 104, .max = 138 },
+	.m1 = { .min = 17, .max = 23 },
+	.m2 = { .min = 5, .max = 11 },
+	.p = { .min = 10, .max = 30 },
+	.p1 = { .min = 1, .max = 3},
+	.p2 = { .dot_limit = 270000,
+		.p2_slow = 10,
+		.p2_fast = 10
+	},
+};
+
+static const struct intel_limit intel_limits_g4x_hdmi = {
+	.dot = { .min = 22000, .max = 400000 },
+	.vco = { .min = 1750000, .max = 3500000},
+	.n = { .min = 1, .max = 4 },
+	.m = { .min = 104, .max = 138 },
+	.m1 = { .min = 16, .max = 23 },
+	.m2 = { .min = 5, .max = 11 },
+	.p = { .min = 5, .max = 80 },
+	.p1 = { .min = 1, .max = 8},
+	.p2 = { .dot_limit = 165000,
+		.p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit intel_limits_g4x_single_channel_lvds = {
+	.dot = { .min = 20000, .max = 115000 },
+	.vco = { .min = 1750000, .max = 3500000 },
+	.n = { .min = 1, .max = 3 },
+	.m = { .min = 104, .max = 138 },
+	.m1 = { .min = 17, .max = 23 },
+	.m2 = { .min = 5, .max = 11 },
+	.p = { .min = 28, .max = 112 },
+	.p1 = { .min = 2, .max = 8 },
+	.p2 = { .dot_limit = 0,
+		.p2_slow = 14, .p2_fast = 14
+	},
+};
+
+static const struct intel_limit intel_limits_g4x_dual_channel_lvds = {
+	.dot = { .min = 80000, .max = 224000 },
+	.vco = { .min = 1750000, .max = 3500000 },
+	.n = { .min = 1, .max = 3 },
+	.m = { .min = 104, .max = 138 },
+	.m1 = { .min = 17, .max = 23 },
+	.m2 = { .min = 5, .max = 11 },
+	.p = { .min = 14, .max = 42 },
+	.p1 = { .min = 2, .max = 6 },
+	.p2 = { .dot_limit = 0,
+		.p2_slow = 7, .p2_fast = 7
+	},
+};
+
+static const struct intel_limit intel_limits_pineview_sdvo = {
+	.dot = { .min = 20000, .max = 400000},
+	.vco = { .min = 1700000, .max = 3500000 },
+	/* Pineview's Ncounter is a ring counter */
+	.n = { .min = 3, .max = 6 },
+	.m = { .min = 2, .max = 256 },
+	/* Pineview only has one combined m divider, which we treat as m2. */
+	.m1 = { .min = 0, .max = 0 },
+	.m2 = { .min = 0, .max = 254 },
+	.p = { .min = 5, .max = 80 },
+	.p1 = { .min = 1, .max = 8 },
+	.p2 = { .dot_limit = 200000,
+		.p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit intel_limits_pineview_lvds = {
+	.dot = { .min = 20000, .max = 400000 },
+	.vco = { .min = 1700000, .max = 3500000 },
+	.n = { .min = 3, .max = 6 },
+	.m = { .min = 2, .max = 256 },
+	.m1 = { .min = 0, .max = 0 },
+	.m2 = { .min = 0, .max = 254 },
+	.p = { .min = 7, .max = 112 },
+	.p1 = { .min = 1, .max = 8 },
+	.p2 = { .dot_limit = 112000,
+		.p2_slow = 14, .p2_fast = 14 },
+};
+
+/* Ironlake / Sandybridge
+ *
+ * We calculate clock using (register_value + 2) for N/M1/M2, so here
+ * the range value for them is (actual_value - 2).
+ */
+static const struct intel_limit intel_limits_ironlake_dac = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 1760000, .max = 3510000 },
+	.n = { .min = 1, .max = 5 },
+	.m = { .min = 79, .max = 127 },
+	.m1 = { .min = 12, .max = 22 },
+	.m2 = { .min = 5, .max = 9 },
+	.p = { .min = 5, .max = 80 },
+	.p1 = { .min = 1, .max = 8 },
+	.p2 = { .dot_limit = 225000,
+		.p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit intel_limits_ironlake_single_lvds = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 1760000, .max = 3510000 },
+	.n = { .min = 1, .max = 3 },
+	.m = { .min = 79, .max = 118 },
+	.m1 = { .min = 12, .max = 22 },
+	.m2 = { .min = 5, .max = 9 },
+	.p = { .min = 28, .max = 112 },
+	.p1 = { .min = 2, .max = 8 },
+	.p2 = { .dot_limit = 225000,
+		.p2_slow = 14, .p2_fast = 14 },
+};
+
+static const struct intel_limit intel_limits_ironlake_dual_lvds = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 1760000, .max = 3510000 },
+	.n = { .min = 1, .max = 3 },
+	.m = { .min = 79, .max = 127 },
+	.m1 = { .min = 12, .max = 22 },
+	.m2 = { .min = 5, .max = 9 },
+	.p = { .min = 14, .max = 56 },
+	.p1 = { .min = 2, .max = 8 },
+	.p2 = { .dot_limit = 225000,
+		.p2_slow = 7, .p2_fast = 7 },
+};
+
+/* LVDS 100mhz refclk limits. */
+static const struct intel_limit intel_limits_ironlake_single_lvds_100m = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 1760000, .max = 3510000 },
+	.n = { .min = 1, .max = 2 },
+	.m = { .min = 79, .max = 126 },
+	.m1 = { .min = 12, .max = 22 },
+	.m2 = { .min = 5, .max = 9 },
+	.p = { .min = 28, .max = 112 },
+	.p1 = { .min = 2, .max = 8 },
+	.p2 = { .dot_limit = 225000,
+		.p2_slow = 14, .p2_fast = 14 },
+};
+
+static const struct intel_limit intel_limits_ironlake_dual_lvds_100m = {
+	.dot = { .min = 25000, .max = 350000 },
+	.vco = { .min = 1760000, .max = 3510000 },
+	.n = { .min = 1, .max = 3 },
+	.m = { .min = 79, .max = 126 },
+	.m1 = { .min = 12, .max = 22 },
+	.m2 = { .min = 5, .max = 9 },
+	.p = { .min = 14, .max = 42 },
+	.p1 = { .min = 2, .max = 6 },
+	.p2 = { .dot_limit = 225000,
+		.p2_slow = 7, .p2_fast = 7 },
+};
+
+static const struct intel_limit intel_limits_vlv = {
+	 /*
+	  * These are the data rate limits (measured in fast clocks)
+	  * since those are the strictest limits we have. The fast
+	  * clock and actual rate limits are more relaxed, so checking
+	  * them would make no difference.
+	  */
+	.dot = { .min = 25000 * 5, .max = 270000 * 5 },
+	.vco = { .min = 4000000, .max = 6000000 },
+	.n = { .min = 1, .max = 7 },
+	.m1 = { .min = 2, .max = 3 },
+	.m2 = { .min = 11, .max = 156 },
+	.p1 = { .min = 2, .max = 3 },
+	.p2 = { .p2_slow = 2, .p2_fast = 20 }, /* slow=min, fast=max */
+};
+
+static const struct intel_limit intel_limits_chv = {
+	/*
+	 * These are the data rate limits (measured in fast clocks)
+	 * since those are the strictest limits we have.  The fast
+	 * clock and actual rate limits are more relaxed, so checking
+	 * them would make no difference.
+	 */
+	.dot = { .min = 25000 * 5, .max = 540000 * 5},
+	.vco = { .min = 4800000, .max = 6480000 },
+	.n = { .min = 1, .max = 1 },
+	.m1 = { .min = 2, .max = 2 },
+	.m2 = { .min = 24 << 22, .max = 175 << 22 },
+	.p1 = { .min = 2, .max = 4 },
+	.p2 = {	.p2_slow = 1, .p2_fast = 14 },
+};
+
+static const struct intel_limit intel_limits_bxt = {
+	/* FIXME: find real dot limits */
+	.dot = { .min = 0, .max = INT_MAX },
+	.vco = { .min = 4800000, .max = 6700000 },
+	.n = { .min = 1, .max = 1 },
+	.m1 = { .min = 2, .max = 2 },
+	/* FIXME: find real m2 limits */
+	.m2 = { .min = 2 << 22, .max = 255 << 22 },
+	.p1 = { .min = 2, .max = 4 },
+	.p2 = { .p2_slow = 1, .p2_fast = 20 },
+};
+
+/* WA Display #0827: Gen9:all */
+static void
+skl_wa_827(struct drm_i915_private *dev_priv, int pipe, bool enable)
+{
+	if (enable)
+		I915_WRITE(CLKGATE_DIS_PSL(pipe),
+			   I915_READ(CLKGATE_DIS_PSL(pipe)) |
+			   DUPS1_GATING_DIS | DUPS2_GATING_DIS);
+	else
+		I915_WRITE(CLKGATE_DIS_PSL(pipe),
+			   I915_READ(CLKGATE_DIS_PSL(pipe)) &
+			   ~(DUPS1_GATING_DIS | DUPS2_GATING_DIS));
+}
+
+/* Wa_2006604312:icl */
+static void
+icl_wa_scalerclkgating(struct drm_i915_private *dev_priv, enum pipe pipe,
+		       bool enable)
+{
+	if (enable)
+		I915_WRITE(CLKGATE_DIS_PSL(pipe),
+			   I915_READ(CLKGATE_DIS_PSL(pipe)) | DPFR_GATING_DIS);
+	else
+		I915_WRITE(CLKGATE_DIS_PSL(pipe),
+			   I915_READ(CLKGATE_DIS_PSL(pipe)) & ~DPFR_GATING_DIS);
+}
+
+static bool
+needs_modeset(const struct drm_crtc_state *state)
+{
+	return drm_atomic_crtc_needs_modeset(state);
+}
+
+/*
+ * Platform specific helpers to calculate the port PLL loopback- (clock.m),
+ * and post-divider (clock.p) values, pre- (clock.vco) and post-divided fast
+ * (clock.dot) clock rates. This fast dot clock is fed to the port's IO logic.
+ * The helpers' return value is the rate of the clock that is fed to the
+ * display engine's pipe which can be the above fast dot clock rate or a
+ * divided-down version of it.
+ */
+/* m1 is reserved as 0 in Pineview, n is a ring counter */
+static int pnv_calc_dpll_params(int refclk, struct dpll *clock)
+{
+	clock->m = clock->m2 + 2;
+	clock->p = clock->p1 * clock->p2;
+	if (WARN_ON(clock->n == 0 || clock->p == 0))
+		return 0;
+	clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
+	clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+	return clock->dot;
+}
+
+static u32 i9xx_dpll_compute_m(struct dpll *dpll)
+{
+	return 5 * (dpll->m1 + 2) + (dpll->m2 + 2);
+}
+
+static int i9xx_calc_dpll_params(int refclk, struct dpll *clock)
+{
+	clock->m = i9xx_dpll_compute_m(clock);
+	clock->p = clock->p1 * clock->p2;
+	if (WARN_ON(clock->n + 2 == 0 || clock->p == 0))
+		return 0;
+	clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n + 2);
+	clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+	return clock->dot;
+}
+
+static int vlv_calc_dpll_params(int refclk, struct dpll *clock)
+{
+	clock->m = clock->m1 * clock->m2;
+	clock->p = clock->p1 * clock->p2;
+	if (WARN_ON(clock->n == 0 || clock->p == 0))
+		return 0;
+	clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
+	clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+	return clock->dot / 5;
+}
+
+int chv_calc_dpll_params(int refclk, struct dpll *clock)
+{
+	clock->m = clock->m1 * clock->m2;
+	clock->p = clock->p1 * clock->p2;
+	if (WARN_ON(clock->n == 0 || clock->p == 0))
+		return 0;
+	clock->vco = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(refclk, clock->m),
+					   clock->n << 22);
+	clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+	return clock->dot / 5;
+}
+
+#define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
+
+/*
+ * Returns whether the given set of divisors are valid for a given refclk with
+ * the given connectors.
+ */
+static bool intel_PLL_is_valid(struct drm_i915_private *dev_priv,
+			       const struct intel_limit *limit,
+			       const struct dpll *clock)
+{
+	if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
+		INTELPllInvalid("n out of range\n");
+	if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
+		INTELPllInvalid("p1 out of range\n");
+	if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
+		INTELPllInvalid("m2 out of range\n");
+	if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
+		INTELPllInvalid("m1 out of range\n");
+
+	if (!IS_PINEVIEW(dev_priv) && !IS_VALLEYVIEW(dev_priv) &&
+	    !IS_CHERRYVIEW(dev_priv) && !IS_GEN9_LP(dev_priv))
+		if (clock->m1 <= clock->m2)
+			INTELPllInvalid("m1 <= m2\n");
+
+	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
+	    !IS_GEN9_LP(dev_priv)) {
+		if (clock->p < limit->p.min || limit->p.max < clock->p)
+			INTELPllInvalid("p out of range\n");
+		if (clock->m < limit->m.min || limit->m.max < clock->m)
+			INTELPllInvalid("m out of range\n");
+	}
+
+	if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
+		INTELPllInvalid("vco out of range\n");
+	/* XXX: We may need to be checking "Dot clock" depending on the multiplier,
+	 * connector, etc., rather than just a single range.
+	 */
+	if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
+		INTELPllInvalid("dot out of range\n");
+
+	return true;
+}
+
+static int
+i9xx_select_p2_div(const struct intel_limit *limit,
+		   const struct intel_crtc_state *crtc_state,
+		   int target)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		/*
+		 * For LVDS just rely on its current settings for dual-channel.
+		 * We haven't figured out how to reliably set up different
+		 * single/dual channel state, if we even can.
+		 */
+		if (intel_is_dual_link_lvds(dev_priv))
+			return limit->p2.p2_fast;
+		else
+			return limit->p2.p2_slow;
+	} else {
+		if (target < limit->p2.dot_limit)
+			return limit->p2.p2_slow;
+		else
+			return limit->p2.p2_fast;
+	}
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE.  The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ *
+ * Target and reference clocks are specified in kHz.
+ *
+ * If match_clock is provided, then best_clock P divider must match the P
+ * divider from @match_clock used for LVDS downclocking.
+ */
+static bool
+i9xx_find_best_dpll(const struct intel_limit *limit,
+		    struct intel_crtc_state *crtc_state,
+		    int target, int refclk, struct dpll *match_clock,
+		    struct dpll *best_clock)
+{
+	struct drm_device *dev = crtc_state->base.crtc->dev;
+	struct dpll clock;
+	int err = target;
+
+	memset(best_clock, 0, sizeof(*best_clock));
+
+	clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
+
+	for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
+	     clock.m1++) {
+		for (clock.m2 = limit->m2.min;
+		     clock.m2 <= limit->m2.max; clock.m2++) {
+			if (clock.m2 >= clock.m1)
+				break;
+			for (clock.n = limit->n.min;
+			     clock.n <= limit->n.max; clock.n++) {
+				for (clock.p1 = limit->p1.min;
+					clock.p1 <= limit->p1.max; clock.p1++) {
+					int this_err;
+
+					i9xx_calc_dpll_params(refclk, &clock);
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
+								&clock))
+						continue;
+					if (match_clock &&
+					    clock.p != match_clock->p)
+						continue;
+
+					this_err = abs(clock.dot - target);
+					if (this_err < err) {
+						*best_clock = clock;
+						err = this_err;
+					}
+				}
+			}
+		}
+	}
+
+	return (err != target);
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE.  The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ *
+ * Target and reference clocks are specified in kHz.
+ *
+ * If match_clock is provided, then best_clock P divider must match the P
+ * divider from @match_clock used for LVDS downclocking.
+ */
+static bool
+pnv_find_best_dpll(const struct intel_limit *limit,
+		   struct intel_crtc_state *crtc_state,
+		   int target, int refclk, struct dpll *match_clock,
+		   struct dpll *best_clock)
+{
+	struct drm_device *dev = crtc_state->base.crtc->dev;
+	struct dpll clock;
+	int err = target;
+
+	memset(best_clock, 0, sizeof(*best_clock));
+
+	clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
+
+	for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
+	     clock.m1++) {
+		for (clock.m2 = limit->m2.min;
+		     clock.m2 <= limit->m2.max; clock.m2++) {
+			for (clock.n = limit->n.min;
+			     clock.n <= limit->n.max; clock.n++) {
+				for (clock.p1 = limit->p1.min;
+					clock.p1 <= limit->p1.max; clock.p1++) {
+					int this_err;
+
+					pnv_calc_dpll_params(refclk, &clock);
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
+								&clock))
+						continue;
+					if (match_clock &&
+					    clock.p != match_clock->p)
+						continue;
+
+					this_err = abs(clock.dot - target);
+					if (this_err < err) {
+						*best_clock = clock;
+						err = this_err;
+					}
+				}
+			}
+		}
+	}
+
+	return (err != target);
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE.  The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ *
+ * Target and reference clocks are specified in kHz.
+ *
+ * If match_clock is provided, then best_clock P divider must match the P
+ * divider from @match_clock used for LVDS downclocking.
+ */
+static bool
+g4x_find_best_dpll(const struct intel_limit *limit,
+		   struct intel_crtc_state *crtc_state,
+		   int target, int refclk, struct dpll *match_clock,
+		   struct dpll *best_clock)
+{
+	struct drm_device *dev = crtc_state->base.crtc->dev;
+	struct dpll clock;
+	int max_n;
+	bool found = false;
+	/* approximately equals target * 0.00585 */
+	int err_most = (target >> 8) + (target >> 9);
+
+	memset(best_clock, 0, sizeof(*best_clock));
+
+	clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
+
+	max_n = limit->n.max;
+	/* based on hardware requirement, prefer smaller n to precision */
+	for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
+		/* based on hardware requirement, prefere larger m1,m2 */
+		for (clock.m1 = limit->m1.max;
+		     clock.m1 >= limit->m1.min; clock.m1--) {
+			for (clock.m2 = limit->m2.max;
+			     clock.m2 >= limit->m2.min; clock.m2--) {
+				for (clock.p1 = limit->p1.max;
+				     clock.p1 >= limit->p1.min; clock.p1--) {
+					int this_err;
+
+					i9xx_calc_dpll_params(refclk, &clock);
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
+								&clock))
+						continue;
+
+					this_err = abs(clock.dot - target);
+					if (this_err < err_most) {
+						*best_clock = clock;
+						err_most = this_err;
+						max_n = clock.n;
+						found = true;
+					}
+				}
+			}
+		}
+	}
+	return found;
+}
+
+/*
+ * Check if the calculated PLL configuration is more optimal compared to the
+ * best configuration and error found so far. Return the calculated error.
+ */
+static bool vlv_PLL_is_optimal(struct drm_device *dev, int target_freq,
+			       const struct dpll *calculated_clock,
+			       const struct dpll *best_clock,
+			       unsigned int best_error_ppm,
+			       unsigned int *error_ppm)
+{
+	/*
+	 * For CHV ignore the error and consider only the P value.
+	 * Prefer a bigger P value based on HW requirements.
+	 */
+	if (IS_CHERRYVIEW(to_i915(dev))) {
+		*error_ppm = 0;
+
+		return calculated_clock->p > best_clock->p;
+	}
+
+	if (WARN_ON_ONCE(!target_freq))
+		return false;
+
+	*error_ppm = div_u64(1000000ULL *
+				abs(target_freq - calculated_clock->dot),
+			     target_freq);
+	/*
+	 * Prefer a better P value over a better (smaller) error if the error
+	 * is small. Ensure this preference for future configurations too by
+	 * setting the error to 0.
+	 */
+	if (*error_ppm < 100 && calculated_clock->p > best_clock->p) {
+		*error_ppm = 0;
+
+		return true;
+	}
+
+	return *error_ppm + 10 < best_error_ppm;
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE.  The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ */
+static bool
+vlv_find_best_dpll(const struct intel_limit *limit,
+		   struct intel_crtc_state *crtc_state,
+		   int target, int refclk, struct dpll *match_clock,
+		   struct dpll *best_clock)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	struct dpll clock;
+	unsigned int bestppm = 1000000;
+	/* min update 19.2 MHz */
+	int max_n = min(limit->n.max, refclk / 19200);
+	bool found = false;
+
+	target *= 5; /* fast clock */
+
+	memset(best_clock, 0, sizeof(*best_clock));
+
+	/* based on hardware requirement, prefer smaller n to precision */
+	for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
+		for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
+			for (clock.p2 = limit->p2.p2_fast; clock.p2 >= limit->p2.p2_slow;
+			     clock.p2 -= clock.p2 > 10 ? 2 : 1) {
+				clock.p = clock.p1 * clock.p2;
+				/* based on hardware requirement, prefer bigger m1,m2 values */
+				for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
+					unsigned int ppm;
+
+					clock.m2 = DIV_ROUND_CLOSEST(target * clock.p * clock.n,
+								     refclk * clock.m1);
+
+					vlv_calc_dpll_params(refclk, &clock);
+
+					if (!intel_PLL_is_valid(to_i915(dev),
+								limit,
+								&clock))
+						continue;
+
+					if (!vlv_PLL_is_optimal(dev, target,
+								&clock,
+								best_clock,
+								bestppm, &ppm))
+						continue;
+
+					*best_clock = clock;
+					bestppm = ppm;
+					found = true;
+				}
+			}
+		}
+	}
+
+	return found;
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE.  The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ */
+static bool
+chv_find_best_dpll(const struct intel_limit *limit,
+		   struct intel_crtc_state *crtc_state,
+		   int target, int refclk, struct dpll *match_clock,
+		   struct dpll *best_clock)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	unsigned int best_error_ppm;
+	struct dpll clock;
+	u64 m2;
+	int found = false;
+
+	memset(best_clock, 0, sizeof(*best_clock));
+	best_error_ppm = 1000000;
+
+	/*
+	 * Based on hardware doc, the n always set to 1, and m1 always
+	 * set to 2.  If requires to support 200Mhz refclk, we need to
+	 * revisit this because n may not 1 anymore.
+	 */
+	clock.n = 1, clock.m1 = 2;
+	target *= 5;	/* fast clock */
+
+	for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
+		for (clock.p2 = limit->p2.p2_fast;
+				clock.p2 >= limit->p2.p2_slow;
+				clock.p2 -= clock.p2 > 10 ? 2 : 1) {
+			unsigned int error_ppm;
+
+			clock.p = clock.p1 * clock.p2;
+
+			m2 = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(target, clock.p * clock.n) << 22,
+						   refclk * clock.m1);
+
+			if (m2 > INT_MAX/clock.m1)
+				continue;
+
+			clock.m2 = m2;
+
+			chv_calc_dpll_params(refclk, &clock);
+
+			if (!intel_PLL_is_valid(to_i915(dev), limit, &clock))
+				continue;
+
+			if (!vlv_PLL_is_optimal(dev, target, &clock, best_clock,
+						best_error_ppm, &error_ppm))
+				continue;
+
+			*best_clock = clock;
+			best_error_ppm = error_ppm;
+			found = true;
+		}
+	}
+
+	return found;
+}
+
+bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
+			struct dpll *best_clock)
+{
+	int refclk = 100000;
+	const struct intel_limit *limit = &intel_limits_bxt;
+
+	return chv_find_best_dpll(limit, crtc_state,
+				  crtc_state->port_clock, refclk,
+				  NULL, best_clock);
+}
+
+bool intel_crtc_active(struct intel_crtc *crtc)
+{
+	/* Be paranoid as we can arrive here with only partial
+	 * state retrieved from the hardware during setup.
+	 *
+	 * We can ditch the adjusted_mode.crtc_clock check as soon
+	 * as Haswell has gained clock readout/fastboot support.
+	 *
+	 * We can ditch the crtc->primary->state->fb check as soon as we can
+	 * properly reconstruct framebuffers.
+	 *
+	 * FIXME: The intel_crtc->active here should be switched to
+	 * crtc->state->active once we have proper CRTC states wired up
+	 * for atomic.
+	 */
+	return crtc->active && crtc->base.primary->state->fb &&
+		crtc->config->base.adjusted_mode.crtc_clock;
+}
+
+enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
+					     enum pipe pipe)
+{
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+
+	return crtc->config->cpu_transcoder;
+}
+
+static bool pipe_scanline_is_moving(struct drm_i915_private *dev_priv,
+				    enum pipe pipe)
+{
+	i915_reg_t reg = PIPEDSL(pipe);
+	u32 line1, line2;
+	u32 line_mask;
+
+	if (IS_GEN(dev_priv, 2))
+		line_mask = DSL_LINEMASK_GEN2;
+	else
+		line_mask = DSL_LINEMASK_GEN3;
+
+	line1 = I915_READ(reg) & line_mask;
+	msleep(5);
+	line2 = I915_READ(reg) & line_mask;
+
+	return line1 != line2;
+}
+
+static void wait_for_pipe_scanline_moving(struct intel_crtc *crtc, bool state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	/* Wait for the display line to settle/start moving */
+	if (wait_for(pipe_scanline_is_moving(dev_priv, pipe) == state, 100))
+		DRM_ERROR("pipe %c scanline %s wait timed out\n",
+			  pipe_name(pipe), onoff(state));
+}
+
+static void intel_wait_for_pipe_scanline_stopped(struct intel_crtc *crtc)
+{
+	wait_for_pipe_scanline_moving(crtc, false);
+}
+
+static void intel_wait_for_pipe_scanline_moving(struct intel_crtc *crtc)
+{
+	wait_for_pipe_scanline_moving(crtc, true);
+}
+
+static void
+intel_wait_for_pipe_off(const struct intel_crtc_state *old_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (INTEL_GEN(dev_priv) >= 4) {
+		enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
+		i915_reg_t reg = PIPECONF(cpu_transcoder);
+
+		/* Wait for the Pipe State to go off */
+		if (intel_wait_for_register(&dev_priv->uncore,
+					    reg, I965_PIPECONF_ACTIVE, 0,
+					    100))
+			WARN(1, "pipe_off wait timed out\n");
+	} else {
+		intel_wait_for_pipe_scanline_stopped(crtc);
+	}
+}
+
+/* Only for pre-ILK configs */
+void assert_pll(struct drm_i915_private *dev_priv,
+		enum pipe pipe, bool state)
+{
+	u32 val;
+	bool cur_state;
+
+	val = I915_READ(DPLL(pipe));
+	cur_state = !!(val & DPLL_VCO_ENABLE);
+	I915_STATE_WARN(cur_state != state,
+	     "PLL state assertion failure (expected %s, current %s)\n",
+			onoff(state), onoff(cur_state));
+}
+
+/* XXX: the dsi pll is shared between MIPI DSI ports */
+void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state)
+{
+	u32 val;
+	bool cur_state;
+
+	vlv_cck_get(dev_priv);
+	val = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
+	vlv_cck_put(dev_priv);
+
+	cur_state = val & DSI_PLL_VCO_EN;
+	I915_STATE_WARN(cur_state != state,
+	     "DSI PLL state assertion failure (expected %s, current %s)\n",
+			onoff(state), onoff(cur_state));
+}
+
+static void assert_fdi_tx(struct drm_i915_private *dev_priv,
+			  enum pipe pipe, bool state)
+{
+	bool cur_state;
+	enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
+								      pipe);
+
+	if (HAS_DDI(dev_priv)) {
+		/* DDI does not have a specific FDI_TX register */
+		u32 val = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
+		cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
+	} else {
+		u32 val = I915_READ(FDI_TX_CTL(pipe));
+		cur_state = !!(val & FDI_TX_ENABLE);
+	}
+	I915_STATE_WARN(cur_state != state,
+	     "FDI TX state assertion failure (expected %s, current %s)\n",
+			onoff(state), onoff(cur_state));
+}
+#define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
+#define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
+
+static void assert_fdi_rx(struct drm_i915_private *dev_priv,
+			  enum pipe pipe, bool state)
+{
+	u32 val;
+	bool cur_state;
+
+	val = I915_READ(FDI_RX_CTL(pipe));
+	cur_state = !!(val & FDI_RX_ENABLE);
+	I915_STATE_WARN(cur_state != state,
+	     "FDI RX state assertion failure (expected %s, current %s)\n",
+			onoff(state), onoff(cur_state));
+}
+#define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
+#define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
+
+static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
+				      enum pipe pipe)
+{
+	u32 val;
+
+	/* ILK FDI PLL is always enabled */
+	if (IS_GEN(dev_priv, 5))
+		return;
+
+	/* On Haswell, DDI ports are responsible for the FDI PLL setup */
+	if (HAS_DDI(dev_priv))
+		return;
+
+	val = I915_READ(FDI_TX_CTL(pipe));
+	I915_STATE_WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
+}
+
+void assert_fdi_rx_pll(struct drm_i915_private *dev_priv,
+		       enum pipe pipe, bool state)
+{
+	u32 val;
+	bool cur_state;
+
+	val = I915_READ(FDI_RX_CTL(pipe));
+	cur_state = !!(val & FDI_RX_PLL_ENABLE);
+	I915_STATE_WARN(cur_state != state,
+	     "FDI RX PLL assertion failure (expected %s, current %s)\n",
+			onoff(state), onoff(cur_state));
+}
+
+void assert_panel_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	i915_reg_t pp_reg;
+	u32 val;
+	enum pipe panel_pipe = INVALID_PIPE;
+	bool locked = true;
+
+	if (WARN_ON(HAS_DDI(dev_priv)))
+		return;
+
+	if (HAS_PCH_SPLIT(dev_priv)) {
+		u32 port_sel;
+
+		pp_reg = PP_CONTROL(0);
+		port_sel = I915_READ(PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
+
+		switch (port_sel) {
+		case PANEL_PORT_SELECT_LVDS:
+			intel_lvds_port_enabled(dev_priv, PCH_LVDS, &panel_pipe);
+			break;
+		case PANEL_PORT_SELECT_DPA:
+			intel_dp_port_enabled(dev_priv, DP_A, PORT_A, &panel_pipe);
+			break;
+		case PANEL_PORT_SELECT_DPC:
+			intel_dp_port_enabled(dev_priv, PCH_DP_C, PORT_C, &panel_pipe);
+			break;
+		case PANEL_PORT_SELECT_DPD:
+			intel_dp_port_enabled(dev_priv, PCH_DP_D, PORT_D, &panel_pipe);
+			break;
+		default:
+			MISSING_CASE(port_sel);
+			break;
+		}
+	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		/* presumably write lock depends on pipe, not port select */
+		pp_reg = PP_CONTROL(pipe);
+		panel_pipe = pipe;
+	} else {
+		u32 port_sel;
+
+		pp_reg = PP_CONTROL(0);
+		port_sel = I915_READ(PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
+
+		WARN_ON(port_sel != PANEL_PORT_SELECT_LVDS);
+		intel_lvds_port_enabled(dev_priv, LVDS, &panel_pipe);
+	}
+
+	val = I915_READ(pp_reg);
+	if (!(val & PANEL_POWER_ON) ||
+	    ((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS))
+		locked = false;
+
+	I915_STATE_WARN(panel_pipe == pipe && locked,
+	     "panel assertion failure, pipe %c regs locked\n",
+	     pipe_name(pipe));
+}
+
+void assert_pipe(struct drm_i915_private *dev_priv,
+		 enum pipe pipe, bool state)
+{
+	bool cur_state;
+	enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
+								      pipe);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+
+	/* we keep both pipes enabled on 830 */
+	if (IS_I830(dev_priv))
+		state = true;
+
+	power_domain = POWER_DOMAIN_TRANSCODER(cpu_transcoder);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (wakeref) {
+		u32 val = I915_READ(PIPECONF(cpu_transcoder));
+		cur_state = !!(val & PIPECONF_ENABLE);
+
+		intel_display_power_put(dev_priv, power_domain, wakeref);
+	} else {
+		cur_state = false;
+	}
+
+	I915_STATE_WARN(cur_state != state,
+	     "pipe %c assertion failure (expected %s, current %s)\n",
+			pipe_name(pipe), onoff(state), onoff(cur_state));
+}
+
+static void assert_plane(struct intel_plane *plane, bool state)
+{
+	enum pipe pipe;
+	bool cur_state;
+
+	cur_state = plane->get_hw_state(plane, &pipe);
+
+	I915_STATE_WARN(cur_state != state,
+			"%s assertion failure (expected %s, current %s)\n",
+			plane->base.name, onoff(state), onoff(cur_state));
+}
+
+#define assert_plane_enabled(p) assert_plane(p, true)
+#define assert_plane_disabled(p) assert_plane(p, false)
+
+static void assert_planes_disabled(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_plane *plane;
+
+	for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane)
+		assert_plane_disabled(plane);
+}
+
+static void assert_vblank_disabled(struct drm_crtc *crtc)
+{
+	if (I915_STATE_WARN_ON(drm_crtc_vblank_get(crtc) == 0))
+		drm_crtc_vblank_put(crtc);
+}
+
+void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
+				    enum pipe pipe)
+{
+	u32 val;
+	bool enabled;
+
+	val = I915_READ(PCH_TRANSCONF(pipe));
+	enabled = !!(val & TRANS_ENABLE);
+	I915_STATE_WARN(enabled,
+	     "transcoder assertion failed, should be off on pipe %c but is still active\n",
+	     pipe_name(pipe));
+}
+
+static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
+				   enum pipe pipe, enum port port,
+				   i915_reg_t dp_reg)
+{
+	enum pipe port_pipe;
+	bool state;
+
+	state = intel_dp_port_enabled(dev_priv, dp_reg, port, &port_pipe);
+
+	I915_STATE_WARN(state && port_pipe == pipe,
+			"PCH DP %c enabled on transcoder %c, should be disabled\n",
+			port_name(port), pipe_name(pipe));
+
+	I915_STATE_WARN(HAS_PCH_IBX(dev_priv) && !state && port_pipe == PIPE_B,
+			"IBX PCH DP %c still using transcoder B\n",
+			port_name(port));
+}
+
+static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
+				     enum pipe pipe, enum port port,
+				     i915_reg_t hdmi_reg)
+{
+	enum pipe port_pipe;
+	bool state;
+
+	state = intel_sdvo_port_enabled(dev_priv, hdmi_reg, &port_pipe);
+
+	I915_STATE_WARN(state && port_pipe == pipe,
+			"PCH HDMI %c enabled on transcoder %c, should be disabled\n",
+			port_name(port), pipe_name(pipe));
+
+	I915_STATE_WARN(HAS_PCH_IBX(dev_priv) && !state && port_pipe == PIPE_B,
+			"IBX PCH HDMI %c still using transcoder B\n",
+			port_name(port));
+}
+
+static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
+				      enum pipe pipe)
+{
+	enum pipe port_pipe;
+
+	assert_pch_dp_disabled(dev_priv, pipe, PORT_B, PCH_DP_B);
+	assert_pch_dp_disabled(dev_priv, pipe, PORT_C, PCH_DP_C);
+	assert_pch_dp_disabled(dev_priv, pipe, PORT_D, PCH_DP_D);
+
+	I915_STATE_WARN(intel_crt_port_enabled(dev_priv, PCH_ADPA, &port_pipe) &&
+			port_pipe == pipe,
+			"PCH VGA enabled on transcoder %c, should be disabled\n",
+			pipe_name(pipe));
+
+	I915_STATE_WARN(intel_lvds_port_enabled(dev_priv, PCH_LVDS, &port_pipe) &&
+			port_pipe == pipe,
+			"PCH LVDS enabled on transcoder %c, should be disabled\n",
+			pipe_name(pipe));
+
+	/* PCH SDVOB multiplex with HDMIB */
+	assert_pch_hdmi_disabled(dev_priv, pipe, PORT_B, PCH_HDMIB);
+	assert_pch_hdmi_disabled(dev_priv, pipe, PORT_C, PCH_HDMIC);
+	assert_pch_hdmi_disabled(dev_priv, pipe, PORT_D, PCH_HDMID);
+}
+
+static void _vlv_enable_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	I915_WRITE(DPLL(pipe), pipe_config->dpll_hw_state.dpll);
+	POSTING_READ(DPLL(pipe));
+	udelay(150);
+
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    DPLL(pipe),
+				    DPLL_LOCK_VLV,
+				    DPLL_LOCK_VLV,
+				    1))
+		DRM_ERROR("DPLL %d failed to lock\n", pipe);
+}
+
+static void vlv_enable_pll(struct intel_crtc *crtc,
+			   const struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	assert_pipe_disabled(dev_priv, pipe);
+
+	/* PLL is protected by panel, make sure we can write it */
+	assert_panel_unlocked(dev_priv, pipe);
+
+	if (pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)
+		_vlv_enable_pll(crtc, pipe_config);
+
+	I915_WRITE(DPLL_MD(pipe), pipe_config->dpll_hw_state.dpll_md);
+	POSTING_READ(DPLL_MD(pipe));
+}
+
+
+static void _chv_enable_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	enum dpio_channel port = vlv_pipe_to_channel(pipe);
+	u32 tmp;
+
+	vlv_dpio_get(dev_priv);
+
+	/* Enable back the 10bit clock to display controller */
+	tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
+	tmp |= DPIO_DCLKP_EN;
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), tmp);
+
+	vlv_dpio_put(dev_priv);
+
+	/*
+	 * Need to wait > 100ns between dclkp clock enable bit and PLL enable.
+	 */
+	udelay(1);
+
+	/* Enable PLL */
+	I915_WRITE(DPLL(pipe), pipe_config->dpll_hw_state.dpll);
+
+	/* Check PLL is locked */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    DPLL(pipe), DPLL_LOCK_VLV, DPLL_LOCK_VLV,
+				    1))
+		DRM_ERROR("PLL %d failed to lock\n", pipe);
+}
+
+static void chv_enable_pll(struct intel_crtc *crtc,
+			   const struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	assert_pipe_disabled(dev_priv, pipe);
+
+	/* PLL is protected by panel, make sure we can write it */
+	assert_panel_unlocked(dev_priv, pipe);
+
+	if (pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)
+		_chv_enable_pll(crtc, pipe_config);
+
+	if (pipe != PIPE_A) {
+		/*
+		 * WaPixelRepeatModeFixForC0:chv
+		 *
+		 * DPLLCMD is AWOL. Use chicken bits to propagate
+		 * the value from DPLLBMD to either pipe B or C.
+		 */
+		I915_WRITE(CBR4_VLV, CBR_DPLLBMD_PIPE(pipe));
+		I915_WRITE(DPLL_MD(PIPE_B), pipe_config->dpll_hw_state.dpll_md);
+		I915_WRITE(CBR4_VLV, 0);
+		dev_priv->chv_dpll_md[pipe] = pipe_config->dpll_hw_state.dpll_md;
+
+		/*
+		 * DPLLB VGA mode also seems to cause problems.
+		 * We should always have it disabled.
+		 */
+		WARN_ON((I915_READ(DPLL(PIPE_B)) & DPLL_VGA_MODE_DIS) == 0);
+	} else {
+		I915_WRITE(DPLL_MD(pipe), pipe_config->dpll_hw_state.dpll_md);
+		POSTING_READ(DPLL_MD(pipe));
+	}
+}
+
+static bool i9xx_has_pps(struct drm_i915_private *dev_priv)
+{
+	if (IS_I830(dev_priv))
+		return false;
+
+	return IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv);
+}
+
+static void i9xx_enable_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	i915_reg_t reg = DPLL(crtc->pipe);
+	u32 dpll = crtc_state->dpll_hw_state.dpll;
+	int i;
+
+	assert_pipe_disabled(dev_priv, crtc->pipe);
+
+	/* PLL is protected by panel, make sure we can write it */
+	if (i9xx_has_pps(dev_priv))
+		assert_panel_unlocked(dev_priv, crtc->pipe);
+
+	/*
+	 * Apparently we need to have VGA mode enabled prior to changing
+	 * the P1/P2 dividers. Otherwise the DPLL will keep using the old
+	 * dividers, even though the register value does change.
+	 */
+	I915_WRITE(reg, dpll & ~DPLL_VGA_MODE_DIS);
+	I915_WRITE(reg, dpll);
+
+	/* Wait for the clocks to stabilize. */
+	POSTING_READ(reg);
+	udelay(150);
+
+	if (INTEL_GEN(dev_priv) >= 4) {
+		I915_WRITE(DPLL_MD(crtc->pipe),
+			   crtc_state->dpll_hw_state.dpll_md);
+	} else {
+		/* The pixel multiplier can only be updated once the
+		 * DPLL is enabled and the clocks are stable.
+		 *
+		 * So write it again.
+		 */
+		I915_WRITE(reg, dpll);
+	}
+
+	/* We do this three times for luck */
+	for (i = 0; i < 3; i++) {
+		I915_WRITE(reg, dpll);
+		POSTING_READ(reg);
+		udelay(150); /* wait for warmup */
+	}
+}
+
+static void i9xx_disable_pll(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	/* Don't disable pipe or pipe PLLs if needed */
+	if (IS_I830(dev_priv))
+		return;
+
+	/* Make sure the pipe isn't still relying on us */
+	assert_pipe_disabled(dev_priv, pipe);
+
+	I915_WRITE(DPLL(pipe), DPLL_VGA_MODE_DIS);
+	POSTING_READ(DPLL(pipe));
+}
+
+static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	u32 val;
+
+	/* Make sure the pipe isn't still relying on us */
+	assert_pipe_disabled(dev_priv, pipe);
+
+	val = DPLL_INTEGRATED_REF_CLK_VLV |
+		DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+	if (pipe != PIPE_A)
+		val |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+	I915_WRITE(DPLL(pipe), val);
+	POSTING_READ(DPLL(pipe));
+}
+
+static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	enum dpio_channel port = vlv_pipe_to_channel(pipe);
+	u32 val;
+
+	/* Make sure the pipe isn't still relying on us */
+	assert_pipe_disabled(dev_priv, pipe);
+
+	val = DPLL_SSC_REF_CLK_CHV |
+		DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+	if (pipe != PIPE_A)
+		val |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+	I915_WRITE(DPLL(pipe), val);
+	POSTING_READ(DPLL(pipe));
+
+	vlv_dpio_get(dev_priv);
+
+	/* Disable 10bit clock to display controller */
+	val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
+	val &= ~DPIO_DCLKP_EN;
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val);
+
+	vlv_dpio_put(dev_priv);
+}
+
+void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
+			 struct intel_digital_port *dport,
+			 unsigned int expected_mask)
+{
+	u32 port_mask;
+	i915_reg_t dpll_reg;
+
+	switch (dport->base.port) {
+	case PORT_B:
+		port_mask = DPLL_PORTB_READY_MASK;
+		dpll_reg = DPLL(0);
+		break;
+	case PORT_C:
+		port_mask = DPLL_PORTC_READY_MASK;
+		dpll_reg = DPLL(0);
+		expected_mask <<= 4;
+		break;
+	case PORT_D:
+		port_mask = DPLL_PORTD_READY_MASK;
+		dpll_reg = DPIO_PHY_STATUS;
+		break;
+	default:
+		BUG();
+	}
+
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    dpll_reg, port_mask, expected_mask,
+				    1000))
+		WARN(1, "timed out waiting for port %c ready: got 0x%x, expected 0x%x\n",
+		     port_name(dport->base.port),
+		     I915_READ(dpll_reg) & port_mask, expected_mask);
+}
+
+static void ironlake_enable_pch_transcoder(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 val, pipeconf_val;
+
+	/* Make sure PCH DPLL is enabled */
+	assert_shared_dpll_enabled(dev_priv, crtc_state->shared_dpll);
+
+	/* FDI must be feeding us bits for PCH ports */
+	assert_fdi_tx_enabled(dev_priv, pipe);
+	assert_fdi_rx_enabled(dev_priv, pipe);
+
+	if (HAS_PCH_CPT(dev_priv)) {
+		/* Workaround: Set the timing override bit before enabling the
+		 * pch transcoder. */
+		reg = TRANS_CHICKEN2(pipe);
+		val = I915_READ(reg);
+		val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
+		I915_WRITE(reg, val);
+	}
+
+	reg = PCH_TRANSCONF(pipe);
+	val = I915_READ(reg);
+	pipeconf_val = I915_READ(PIPECONF(pipe));
+
+	if (HAS_PCH_IBX(dev_priv)) {
+		/*
+		 * Make the BPC in transcoder be consistent with
+		 * that in pipeconf reg. For HDMI we must use 8bpc
+		 * here for both 8bpc and 12bpc.
+		 */
+		val &= ~PIPECONF_BPC_MASK;
+		if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+			val |= PIPECONF_8BPC;
+		else
+			val |= pipeconf_val & PIPECONF_BPC_MASK;
+	}
+
+	val &= ~TRANS_INTERLACE_MASK;
+	if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK) {
+		if (HAS_PCH_IBX(dev_priv) &&
+		    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO))
+			val |= TRANS_LEGACY_INTERLACED_ILK;
+		else
+			val |= TRANS_INTERLACED;
+	} else {
+		val |= TRANS_PROGRESSIVE;
+	}
+
+	I915_WRITE(reg, val | TRANS_ENABLE);
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    reg, TRANS_STATE_ENABLE, TRANS_STATE_ENABLE,
+				    100))
+		DRM_ERROR("failed to enable transcoder %c\n", pipe_name(pipe));
+}
+
+static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
+				      enum transcoder cpu_transcoder)
+{
+	u32 val, pipeconf_val;
+
+	/* FDI must be feeding us bits for PCH ports */
+	assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
+	assert_fdi_rx_enabled(dev_priv, PIPE_A);
+
+	/* Workaround: set timing override bit. */
+	val = I915_READ(TRANS_CHICKEN2(PIPE_A));
+	val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
+	I915_WRITE(TRANS_CHICKEN2(PIPE_A), val);
+
+	val = TRANS_ENABLE;
+	pipeconf_val = I915_READ(PIPECONF(cpu_transcoder));
+
+	if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) ==
+	    PIPECONF_INTERLACED_ILK)
+		val |= TRANS_INTERLACED;
+	else
+		val |= TRANS_PROGRESSIVE;
+
+	I915_WRITE(LPT_TRANSCONF, val);
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    LPT_TRANSCONF,
+				    TRANS_STATE_ENABLE,
+				    TRANS_STATE_ENABLE,
+				    100))
+		DRM_ERROR("Failed to enable PCH transcoder\n");
+}
+
+static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
+					    enum pipe pipe)
+{
+	i915_reg_t reg;
+	u32 val;
+
+	/* FDI relies on the transcoder */
+	assert_fdi_tx_disabled(dev_priv, pipe);
+	assert_fdi_rx_disabled(dev_priv, pipe);
+
+	/* Ports must be off as well */
+	assert_pch_ports_disabled(dev_priv, pipe);
+
+	reg = PCH_TRANSCONF(pipe);
+	val = I915_READ(reg);
+	val &= ~TRANS_ENABLE;
+	I915_WRITE(reg, val);
+	/* wait for PCH transcoder off, transcoder state */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    reg, TRANS_STATE_ENABLE, 0,
+				    50))
+		DRM_ERROR("failed to disable transcoder %c\n", pipe_name(pipe));
+
+	if (HAS_PCH_CPT(dev_priv)) {
+		/* Workaround: Clear the timing override chicken bit again. */
+		reg = TRANS_CHICKEN2(pipe);
+		val = I915_READ(reg);
+		val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
+		I915_WRITE(reg, val);
+	}
+}
+
+void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = I915_READ(LPT_TRANSCONF);
+	val &= ~TRANS_ENABLE;
+	I915_WRITE(LPT_TRANSCONF, val);
+	/* wait for PCH transcoder off, transcoder state */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    LPT_TRANSCONF, TRANS_STATE_ENABLE, 0,
+				    50))
+		DRM_ERROR("Failed to disable PCH transcoder\n");
+
+	/* Workaround: clear timing override bit. */
+	val = I915_READ(TRANS_CHICKEN2(PIPE_A));
+	val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
+	I915_WRITE(TRANS_CHICKEN2(PIPE_A), val);
+}
+
+enum pipe intel_crtc_pch_transcoder(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (HAS_PCH_LPT(dev_priv))
+		return PIPE_A;
+	else
+		return crtc->pipe;
+}
+
+static u32 intel_crtc_max_vblank_count(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	/*
+	 * On i965gm the hardware frame counter reads
+	 * zero when the TV encoder is enabled :(
+	 */
+	if (IS_I965GM(dev_priv) &&
+	    (crtc_state->output_types & BIT(INTEL_OUTPUT_TVOUT)))
+		return 0;
+
+	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
+		return 0xffffffff; /* full 32 bit counter */
+	else if (INTEL_GEN(dev_priv) >= 3)
+		return 0xffffff; /* only 24 bits of frame count */
+	else
+		return 0; /* Gen2 doesn't have a hardware frame counter */
+}
+
+static void intel_crtc_vblank_on(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+
+	drm_crtc_set_max_vblank_count(&crtc->base,
+				      intel_crtc_max_vblank_count(crtc_state));
+	drm_crtc_vblank_on(&crtc->base);
+}
+
+static void intel_enable_pipe(const struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = new_crtc_state->cpu_transcoder;
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 val;
+
+	DRM_DEBUG_KMS("enabling pipe %c\n", pipe_name(pipe));
+
+	assert_planes_disabled(crtc);
+
+	/*
+	 * A pipe without a PLL won't actually be able to drive bits from
+	 * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
+	 * need the check.
+	 */
+	if (HAS_GMCH(dev_priv)) {
+		if (intel_crtc_has_type(new_crtc_state, INTEL_OUTPUT_DSI))
+			assert_dsi_pll_enabled(dev_priv);
+		else
+			assert_pll_enabled(dev_priv, pipe);
+	} else {
+		if (new_crtc_state->has_pch_encoder) {
+			/* if driving the PCH, we need FDI enabled */
+			assert_fdi_rx_pll_enabled(dev_priv,
+						  intel_crtc_pch_transcoder(crtc));
+			assert_fdi_tx_pll_enabled(dev_priv,
+						  (enum pipe) cpu_transcoder);
+		}
+		/* FIXME: assert CPU port conditions for SNB+ */
+	}
+
+	trace_intel_pipe_enable(dev_priv, pipe);
+
+	reg = PIPECONF(cpu_transcoder);
+	val = I915_READ(reg);
+	if (val & PIPECONF_ENABLE) {
+		/* we keep both pipes enabled on 830 */
+		WARN_ON(!IS_I830(dev_priv));
+		return;
+	}
+
+	I915_WRITE(reg, val | PIPECONF_ENABLE);
+	POSTING_READ(reg);
+
+	/*
+	 * Until the pipe starts PIPEDSL reads will return a stale value,
+	 * which causes an apparent vblank timestamp jump when PIPEDSL
+	 * resets to its proper value. That also messes up the frame count
+	 * when it's derived from the timestamps. So let's wait for the
+	 * pipe to start properly before we call drm_crtc_vblank_on()
+	 */
+	if (intel_crtc_max_vblank_count(new_crtc_state) == 0)
+		intel_wait_for_pipe_scanline_moving(crtc);
+}
+
+static void intel_disable_pipe(const struct intel_crtc_state *old_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
+	enum pipe pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 val;
+
+	DRM_DEBUG_KMS("disabling pipe %c\n", pipe_name(pipe));
+
+	/*
+	 * Make sure planes won't keep trying to pump pixels to us,
+	 * or we might hang the display.
+	 */
+	assert_planes_disabled(crtc);
+
+	trace_intel_pipe_disable(dev_priv, pipe);
+
+	reg = PIPECONF(cpu_transcoder);
+	val = I915_READ(reg);
+	if ((val & PIPECONF_ENABLE) == 0)
+		return;
+
+	/*
+	 * Double wide has implications for planes
+	 * so best keep it disabled when not needed.
+	 */
+	if (old_crtc_state->double_wide)
+		val &= ~PIPECONF_DOUBLE_WIDE;
+
+	/* Don't disable pipe or pipe PLLs if needed */
+	if (!IS_I830(dev_priv))
+		val &= ~PIPECONF_ENABLE;
+
+	I915_WRITE(reg, val);
+	if ((val & PIPECONF_ENABLE) == 0)
+		intel_wait_for_pipe_off(old_crtc_state);
+}
+
+static unsigned int intel_tile_size(const struct drm_i915_private *dev_priv)
+{
+	return IS_GEN(dev_priv, 2) ? 2048 : 4096;
+}
+
+static unsigned int
+intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
+{
+	struct drm_i915_private *dev_priv = to_i915(fb->dev);
+	unsigned int cpp = fb->format->cpp[color_plane];
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+		return intel_tile_size(dev_priv);
+	case I915_FORMAT_MOD_X_TILED:
+		if (IS_GEN(dev_priv, 2))
+			return 128;
+		else
+			return 512;
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+		if (color_plane == 1)
+			return 128;
+		/* fall through */
+	case I915_FORMAT_MOD_Y_TILED:
+		if (IS_GEN(dev_priv, 2) || HAS_128_BYTE_Y_TILING(dev_priv))
+			return 128;
+		else
+			return 512;
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+		if (color_plane == 1)
+			return 128;
+		/* fall through */
+	case I915_FORMAT_MOD_Yf_TILED:
+		switch (cpp) {
+		case 1:
+			return 64;
+		case 2:
+		case 4:
+			return 128;
+		case 8:
+		case 16:
+			return 256;
+		default:
+			MISSING_CASE(cpp);
+			return cpp;
+		}
+		break;
+	default:
+		MISSING_CASE(fb->modifier);
+		return cpp;
+	}
+}
+
+static unsigned int
+intel_tile_height(const struct drm_framebuffer *fb, int color_plane)
+{
+	return intel_tile_size(to_i915(fb->dev)) /
+		intel_tile_width_bytes(fb, color_plane);
+}
+
+/* Return the tile dimensions in pixel units */
+static void intel_tile_dims(const struct drm_framebuffer *fb, int color_plane,
+			    unsigned int *tile_width,
+			    unsigned int *tile_height)
+{
+	unsigned int tile_width_bytes = intel_tile_width_bytes(fb, color_plane);
+	unsigned int cpp = fb->format->cpp[color_plane];
+
+	*tile_width = tile_width_bytes / cpp;
+	*tile_height = intel_tile_size(to_i915(fb->dev)) / tile_width_bytes;
+}
+
+unsigned int
+intel_fb_align_height(const struct drm_framebuffer *fb,
+		      int color_plane, unsigned int height)
+{
+	unsigned int tile_height = intel_tile_height(fb, color_plane);
+
+	return ALIGN(height, tile_height);
+}
+
+unsigned int intel_rotation_info_size(const struct intel_rotation_info *rot_info)
+{
+	unsigned int size = 0;
+	int i;
+
+	for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++)
+		size += rot_info->plane[i].width * rot_info->plane[i].height;
+
+	return size;
+}
+
+unsigned int intel_remapped_info_size(const struct intel_remapped_info *rem_info)
+{
+	unsigned int size = 0;
+	int i;
+
+	for (i = 0 ; i < ARRAY_SIZE(rem_info->plane); i++)
+		size += rem_info->plane[i].width * rem_info->plane[i].height;
+
+	return size;
+}
+
+static void
+intel_fill_fb_ggtt_view(struct i915_ggtt_view *view,
+			const struct drm_framebuffer *fb,
+			unsigned int rotation)
+{
+	view->type = I915_GGTT_VIEW_NORMAL;
+	if (drm_rotation_90_or_270(rotation)) {
+		view->type = I915_GGTT_VIEW_ROTATED;
+		view->rotated = to_intel_framebuffer(fb)->rot_info;
+	}
+}
+
+static unsigned int intel_cursor_alignment(const struct drm_i915_private *dev_priv)
+{
+	if (IS_I830(dev_priv))
+		return 16 * 1024;
+	else if (IS_I85X(dev_priv))
+		return 256;
+	else if (IS_I845G(dev_priv) || IS_I865G(dev_priv))
+		return 32;
+	else
+		return 4 * 1024;
+}
+
+static unsigned int intel_linear_alignment(const struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) >= 9)
+		return 256 * 1024;
+	else if (IS_I965G(dev_priv) || IS_I965GM(dev_priv) ||
+		 IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		return 128 * 1024;
+	else if (INTEL_GEN(dev_priv) >= 4)
+		return 4 * 1024;
+	else
+		return 0;
+}
+
+static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
+					 int color_plane)
+{
+	struct drm_i915_private *dev_priv = to_i915(fb->dev);
+
+	/* AUX_DIST needs only 4K alignment */
+	if (color_plane == 1)
+		return 4096;
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+		return intel_linear_alignment(dev_priv);
+	case I915_FORMAT_MOD_X_TILED:
+		if (INTEL_GEN(dev_priv) >= 9)
+			return 256 * 1024;
+		return 0;
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+	case I915_FORMAT_MOD_Y_TILED:
+	case I915_FORMAT_MOD_Yf_TILED:
+		return 1 * 1024 * 1024;
+	default:
+		MISSING_CASE(fb->modifier);
+		return 0;
+	}
+}
+
+static bool intel_plane_uses_fence(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+
+	return INTEL_GEN(dev_priv) < 4 ||
+		(plane->has_fbc &&
+		 plane_state->view.type == I915_GGTT_VIEW_NORMAL);
+}
+
+struct i915_vma *
+intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
+			   const struct i915_ggtt_view *view,
+			   bool uses_fence,
+			   unsigned long *out_flags)
+{
+	struct drm_device *dev = fb->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	intel_wakeref_t wakeref;
+	struct i915_vma *vma;
+	unsigned int pinctl;
+	u32 alignment;
+
+	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
+
+	alignment = intel_surf_alignment(fb, 0);
+
+	/* Note that the w/a also requires 64 PTE of padding following the
+	 * bo. We currently fill all unused PTE with the shadow page and so
+	 * we should always have valid PTE following the scanout preventing
+	 * the VT-d warning.
+	 */
+	if (intel_scanout_needs_vtd_wa(dev_priv) && alignment < 256 * 1024)
+		alignment = 256 * 1024;
+
+	/*
+	 * Global gtt pte registers are special registers which actually forward
+	 * writes to a chunk of system memory. Which means that there is no risk
+	 * that the register values disappear as soon as we call
+	 * intel_runtime_pm_put(), so it is correct to wrap only the
+	 * pin/unpin/fence and not more.
+	 */
+	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
+	i915_gem_object_lock(obj);
+
+	atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
+
+	pinctl = 0;
+
+	/* Valleyview is definitely limited to scanning out the first
+	 * 512MiB. Lets presume this behaviour was inherited from the
+	 * g4x display engine and that all earlier gen are similarly
+	 * limited. Testing suggests that it is a little more
+	 * complicated than this. For example, Cherryview appears quite
+	 * happy to scanout from anywhere within its global aperture.
+	 */
+	if (HAS_GMCH(dev_priv))
+		pinctl |= PIN_MAPPABLE;
+
+	vma = i915_gem_object_pin_to_display_plane(obj,
+						   alignment, view, pinctl);
+	if (IS_ERR(vma))
+		goto err;
+
+	if (uses_fence && i915_vma_is_map_and_fenceable(vma)) {
+		int ret;
+
+		/* Install a fence for tiled scan-out. Pre-i965 always needs a
+		 * fence, whereas 965+ only requires a fence if using
+		 * framebuffer compression.  For simplicity, we always, when
+		 * possible, install a fence as the cost is not that onerous.
+		 *
+		 * If we fail to fence the tiled scanout, then either the
+		 * modeset will reject the change (which is highly unlikely as
+		 * the affected systems, all but one, do not have unmappable
+		 * space) or we will not be able to enable full powersaving
+		 * techniques (also likely not to apply due to various limits
+		 * FBC and the like impose on the size of the buffer, which
+		 * presumably we violated anyway with this unmappable buffer).
+		 * Anyway, it is presumably better to stumble onwards with
+		 * something and try to run the system in a "less than optimal"
+		 * mode that matches the user configuration.
+		 */
+		ret = i915_vma_pin_fence(vma);
+		if (ret != 0 && INTEL_GEN(dev_priv) < 4) {
+			i915_gem_object_unpin_from_display_plane(vma);
+			vma = ERR_PTR(ret);
+			goto err;
+		}
+
+		if (ret == 0 && vma->fence)
+			*out_flags |= PLANE_HAS_FENCE;
+	}
+
+	i915_vma_get(vma);
+err:
+	atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
+
+	i915_gem_object_unlock(obj);
+	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+	return vma;
+}
+
+void intel_unpin_fb_vma(struct i915_vma *vma, unsigned long flags)
+{
+	lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
+
+	i915_gem_object_lock(vma->obj);
+	if (flags & PLANE_HAS_FENCE)
+		i915_vma_unpin_fence(vma);
+	i915_gem_object_unpin_from_display_plane(vma);
+	i915_gem_object_unlock(vma->obj);
+
+	i915_vma_put(vma);
+}
+
+static int intel_fb_pitch(const struct drm_framebuffer *fb, int color_plane,
+			  unsigned int rotation)
+{
+	if (drm_rotation_90_or_270(rotation))
+		return to_intel_framebuffer(fb)->rotated[color_plane].pitch;
+	else
+		return fb->pitches[color_plane];
+}
+
+/*
+ * Convert the x/y offsets into a linear offset.
+ * Only valid with 0/180 degree rotation, which is fine since linear
+ * offset is only used with linear buffers on pre-hsw and tiled buffers
+ * with gen2/3, and 90/270 degree rotations isn't supported on any of them.
+ */
+u32 intel_fb_xy_to_linear(int x, int y,
+			  const struct intel_plane_state *state,
+			  int color_plane)
+{
+	const struct drm_framebuffer *fb = state->base.fb;
+	unsigned int cpp = fb->format->cpp[color_plane];
+	unsigned int pitch = state->color_plane[color_plane].stride;
+
+	return y * pitch + x * cpp;
+}
+
+/*
+ * Add the x/y offsets derived from fb->offsets[] to the user
+ * specified plane src x/y offsets. The resulting x/y offsets
+ * specify the start of scanout from the beginning of the gtt mapping.
+ */
+void intel_add_fb_offsets(int *x, int *y,
+			  const struct intel_plane_state *state,
+			  int color_plane)
+
+{
+	*x += state->color_plane[color_plane].x;
+	*y += state->color_plane[color_plane].y;
+}
+
+static u32 intel_adjust_tile_offset(int *x, int *y,
+				    unsigned int tile_width,
+				    unsigned int tile_height,
+				    unsigned int tile_size,
+				    unsigned int pitch_tiles,
+				    u32 old_offset,
+				    u32 new_offset)
+{
+	unsigned int pitch_pixels = pitch_tiles * tile_width;
+	unsigned int tiles;
+
+	WARN_ON(old_offset & (tile_size - 1));
+	WARN_ON(new_offset & (tile_size - 1));
+	WARN_ON(new_offset > old_offset);
+
+	tiles = (old_offset - new_offset) / tile_size;
+
+	*y += tiles / pitch_tiles * tile_height;
+	*x += tiles % pitch_tiles * tile_width;
+
+	/* minimize x in case it got needlessly big */
+	*y += *x / pitch_pixels * tile_height;
+	*x %= pitch_pixels;
+
+	return new_offset;
+}
+
+static bool is_surface_linear(u64 modifier, int color_plane)
+{
+	return modifier == DRM_FORMAT_MOD_LINEAR;
+}
+
+static u32 intel_adjust_aligned_offset(int *x, int *y,
+				       const struct drm_framebuffer *fb,
+				       int color_plane,
+				       unsigned int rotation,
+				       unsigned int pitch,
+				       u32 old_offset, u32 new_offset)
+{
+	struct drm_i915_private *dev_priv = to_i915(fb->dev);
+	unsigned int cpp = fb->format->cpp[color_plane];
+
+	WARN_ON(new_offset > old_offset);
+
+	if (!is_surface_linear(fb->modifier, color_plane)) {
+		unsigned int tile_size, tile_width, tile_height;
+		unsigned int pitch_tiles;
+
+		tile_size = intel_tile_size(dev_priv);
+		intel_tile_dims(fb, color_plane, &tile_width, &tile_height);
+
+		if (drm_rotation_90_or_270(rotation)) {
+			pitch_tiles = pitch / tile_height;
+			swap(tile_width, tile_height);
+		} else {
+			pitch_tiles = pitch / (tile_width * cpp);
+		}
+
+		intel_adjust_tile_offset(x, y, tile_width, tile_height,
+					 tile_size, pitch_tiles,
+					 old_offset, new_offset);
+	} else {
+		old_offset += *y * pitch + *x * cpp;
+
+		*y = (old_offset - new_offset) / pitch;
+		*x = ((old_offset - new_offset) - *y * pitch) / cpp;
+	}
+
+	return new_offset;
+}
+
+/*
+ * Adjust the tile offset by moving the difference into
+ * the x/y offsets.
+ */
+static u32 intel_plane_adjust_aligned_offset(int *x, int *y,
+					     const struct intel_plane_state *state,
+					     int color_plane,
+					     u32 old_offset, u32 new_offset)
+{
+	return intel_adjust_aligned_offset(x, y, state->base.fb, color_plane,
+					   state->base.rotation,
+					   state->color_plane[color_plane].stride,
+					   old_offset, new_offset);
+}
+
+/*
+ * Computes the aligned offset to the base tile and adjusts
+ * x, y. bytes per pixel is assumed to be a power-of-two.
+ *
+ * In the 90/270 rotated case, x and y are assumed
+ * to be already rotated to match the rotated GTT view, and
+ * pitch is the tile_height aligned framebuffer height.
+ *
+ * This function is used when computing the derived information
+ * under intel_framebuffer, so using any of that information
+ * here is not allowed. Anything under drm_framebuffer can be
+ * used. This is why the user has to pass in the pitch since it
+ * is specified in the rotated orientation.
+ */
+static u32 intel_compute_aligned_offset(struct drm_i915_private *dev_priv,
+					int *x, int *y,
+					const struct drm_framebuffer *fb,
+					int color_plane,
+					unsigned int pitch,
+					unsigned int rotation,
+					u32 alignment)
+{
+	unsigned int cpp = fb->format->cpp[color_plane];
+	u32 offset, offset_aligned;
+
+	if (alignment)
+		alignment--;
+
+	if (!is_surface_linear(fb->modifier, color_plane)) {
+		unsigned int tile_size, tile_width, tile_height;
+		unsigned int tile_rows, tiles, pitch_tiles;
+
+		tile_size = intel_tile_size(dev_priv);
+		intel_tile_dims(fb, color_plane, &tile_width, &tile_height);
+
+		if (drm_rotation_90_or_270(rotation)) {
+			pitch_tiles = pitch / tile_height;
+			swap(tile_width, tile_height);
+		} else {
+			pitch_tiles = pitch / (tile_width * cpp);
+		}
+
+		tile_rows = *y / tile_height;
+		*y %= tile_height;
+
+		tiles = *x / tile_width;
+		*x %= tile_width;
+
+		offset = (tile_rows * pitch_tiles + tiles) * tile_size;
+		offset_aligned = offset & ~alignment;
+
+		intel_adjust_tile_offset(x, y, tile_width, tile_height,
+					 tile_size, pitch_tiles,
+					 offset, offset_aligned);
+	} else {
+		offset = *y * pitch + *x * cpp;
+		offset_aligned = offset & ~alignment;
+
+		*y = (offset & alignment) / pitch;
+		*x = ((offset & alignment) - *y * pitch) / cpp;
+	}
+
+	return offset_aligned;
+}
+
+static u32 intel_plane_compute_aligned_offset(int *x, int *y,
+					      const struct intel_plane_state *state,
+					      int color_plane)
+{
+	struct intel_plane *intel_plane = to_intel_plane(state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
+	const struct drm_framebuffer *fb = state->base.fb;
+	unsigned int rotation = state->base.rotation;
+	int pitch = state->color_plane[color_plane].stride;
+	u32 alignment;
+
+	if (intel_plane->id == PLANE_CURSOR)
+		alignment = intel_cursor_alignment(dev_priv);
+	else
+		alignment = intel_surf_alignment(fb, color_plane);
+
+	return intel_compute_aligned_offset(dev_priv, x, y, fb, color_plane,
+					    pitch, rotation, alignment);
+}
+
+/* Convert the fb->offset[] into x/y offsets */
+static int intel_fb_offset_to_xy(int *x, int *y,
+				 const struct drm_framebuffer *fb,
+				 int color_plane)
+{
+	struct drm_i915_private *dev_priv = to_i915(fb->dev);
+	unsigned int height;
+
+	if (fb->modifier != DRM_FORMAT_MOD_LINEAR &&
+	    fb->offsets[color_plane] % intel_tile_size(dev_priv)) {
+		DRM_DEBUG_KMS("Misaligned offset 0x%08x for color plane %d\n",
+			      fb->offsets[color_plane], color_plane);
+		return -EINVAL;
+	}
+
+	height = drm_framebuffer_plane_height(fb->height, fb, color_plane);
+	height = ALIGN(height, intel_tile_height(fb, color_plane));
+
+	/* Catch potential overflows early */
+	if (add_overflows_t(u32, mul_u32_u32(height, fb->pitches[color_plane]),
+			    fb->offsets[color_plane])) {
+		DRM_DEBUG_KMS("Bad offset 0x%08x or pitch %d for color plane %d\n",
+			      fb->offsets[color_plane], fb->pitches[color_plane],
+			      color_plane);
+		return -ERANGE;
+	}
+
+	*x = 0;
+	*y = 0;
+
+	intel_adjust_aligned_offset(x, y,
+				    fb, color_plane, DRM_MODE_ROTATE_0,
+				    fb->pitches[color_plane],
+				    fb->offsets[color_plane], 0);
+
+	return 0;
+}
+
+static unsigned int intel_fb_modifier_to_tiling(u64 fb_modifier)
+{
+	switch (fb_modifier) {
+	case I915_FORMAT_MOD_X_TILED:
+		return I915_TILING_X;
+	case I915_FORMAT_MOD_Y_TILED:
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+		return I915_TILING_Y;
+	default:
+		return I915_TILING_NONE;
+	}
+}
+
+/*
+ * From the Sky Lake PRM:
+ * "The Color Control Surface (CCS) contains the compression status of
+ *  the cache-line pairs. The compression state of the cache-line pair
+ *  is specified by 2 bits in the CCS. Each CCS cache-line represents
+ *  an area on the main surface of 16 x16 sets of 128 byte Y-tiled
+ *  cache-line-pairs. CCS is always Y tiled."
+ *
+ * Since cache line pairs refers to horizontally adjacent cache lines,
+ * each cache line in the CCS corresponds to an area of 32x16 cache
+ * lines on the main surface. Since each pixel is 4 bytes, this gives
+ * us a ratio of one byte in the CCS for each 8x16 pixels in the
+ * main surface.
+ */
+static const struct drm_format_info ccs_formats[] = {
+	{ .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 2,
+	  .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, },
+	{ .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 2,
+	  .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, },
+	{ .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 2,
+	  .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, .has_alpha = true, },
+	{ .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 2,
+	  .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, .has_alpha = true, },
+};
+
+static const struct drm_format_info *
+lookup_format_info(const struct drm_format_info formats[],
+		   int num_formats, u32 format)
+{
+	int i;
+
+	for (i = 0; i < num_formats; i++) {
+		if (formats[i].format == format)
+			return &formats[i];
+	}
+
+	return NULL;
+}
+
+static const struct drm_format_info *
+intel_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
+{
+	switch (cmd->modifier[0]) {
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+		return lookup_format_info(ccs_formats,
+					  ARRAY_SIZE(ccs_formats),
+					  cmd->pixel_format);
+	default:
+		return NULL;
+	}
+}
+
+bool is_ccs_modifier(u64 modifier)
+{
+	return modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
+	       modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
+}
+
+u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
+			      u32 pixel_format, u64 modifier)
+{
+	struct intel_crtc *crtc;
+	struct intel_plane *plane;
+
+	/*
+	 * We assume the primary plane for pipe A has
+	 * the highest stride limits of them all.
+	 */
+	crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
+	plane = to_intel_plane(crtc->base.primary);
+
+	return plane->max_stride(plane, pixel_format, modifier,
+				 DRM_MODE_ROTATE_0);
+}
+
+static
+u32 intel_fb_max_stride(struct drm_i915_private *dev_priv,
+			u32 pixel_format, u64 modifier)
+{
+	/*
+	 * Arbitrary limit for gen4+ chosen to match the
+	 * render engine max stride.
+	 *
+	 * The new CCS hash mode makes remapping impossible
+	 */
+	if (!is_ccs_modifier(modifier)) {
+		if (INTEL_GEN(dev_priv) >= 7)
+			return 256*1024;
+		else if (INTEL_GEN(dev_priv) >= 4)
+			return 128*1024;
+	}
+
+	return intel_plane_fb_max_stride(dev_priv, pixel_format, modifier);
+}
+
+static u32
+intel_fb_stride_alignment(const struct drm_framebuffer *fb, int color_plane)
+{
+	struct drm_i915_private *dev_priv = to_i915(fb->dev);
+
+	if (fb->modifier == DRM_FORMAT_MOD_LINEAR) {
+		u32 max_stride = intel_plane_fb_max_stride(dev_priv,
+							   fb->format->format,
+							   fb->modifier);
+
+		/*
+		 * To make remapping with linear generally feasible
+		 * we need the stride to be page aligned.
+		 */
+		if (fb->pitches[color_plane] > max_stride)
+			return intel_tile_size(dev_priv);
+		else
+			return 64;
+	} else {
+		return intel_tile_width_bytes(fb, color_plane);
+	}
+}
+
+bool intel_plane_can_remap(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int i;
+
+	/* We don't want to deal with remapping with cursors */
+	if (plane->id == PLANE_CURSOR)
+		return false;
+
+	/*
+	 * The display engine limits already match/exceed the
+	 * render engine limits, so not much point in remapping.
+	 * Would also need to deal with the fence POT alignment
+	 * and gen2 2KiB GTT tile size.
+	 */
+	if (INTEL_GEN(dev_priv) < 4)
+		return false;
+
+	/*
+	 * The new CCS hash mode isn't compatible with remapping as
+	 * the virtual address of the pages affects the compressed data.
+	 */
+	if (is_ccs_modifier(fb->modifier))
+		return false;
+
+	/* Linear needs a page aligned stride for remapping */
+	if (fb->modifier == DRM_FORMAT_MOD_LINEAR) {
+		unsigned int alignment = intel_tile_size(dev_priv) - 1;
+
+		for (i = 0; i < fb->format->num_planes; i++) {
+			if (fb->pitches[i] & alignment)
+				return false;
+		}
+	}
+
+	return true;
+}
+
+static bool intel_plane_needs_remap(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	u32 stride, max_stride;
+
+	/*
+	 * No remapping for invisible planes since we don't have
+	 * an actual source viewport to remap.
+	 */
+	if (!plane_state->base.visible)
+		return false;
+
+	if (!intel_plane_can_remap(plane_state))
+		return false;
+
+	/*
+	 * FIXME: aux plane limits on gen9+ are
+	 * unclear in Bspec, for now no checking.
+	 */
+	stride = intel_fb_pitch(fb, 0, rotation);
+	max_stride = plane->max_stride(plane, fb->format->format,
+				       fb->modifier, rotation);
+
+	return stride > max_stride;
+}
+
+static int
+intel_fill_fb_info(struct drm_i915_private *dev_priv,
+		   struct drm_framebuffer *fb)
+{
+	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+	struct intel_rotation_info *rot_info = &intel_fb->rot_info;
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	u32 gtt_offset_rotated = 0;
+	unsigned int max_size = 0;
+	int i, num_planes = fb->format->num_planes;
+	unsigned int tile_size = intel_tile_size(dev_priv);
+
+	for (i = 0; i < num_planes; i++) {
+		unsigned int width, height;
+		unsigned int cpp, size;
+		u32 offset;
+		int x, y;
+		int ret;
+
+		cpp = fb->format->cpp[i];
+		width = drm_framebuffer_plane_width(fb->width, fb, i);
+		height = drm_framebuffer_plane_height(fb->height, fb, i);
+
+		ret = intel_fb_offset_to_xy(&x, &y, fb, i);
+		if (ret) {
+			DRM_DEBUG_KMS("bad fb plane %d offset: 0x%x\n",
+				      i, fb->offsets[i]);
+			return ret;
+		}
+
+		if (is_ccs_modifier(fb->modifier) && i == 1) {
+			int hsub = fb->format->hsub;
+			int vsub = fb->format->vsub;
+			int tile_width, tile_height;
+			int main_x, main_y;
+			int ccs_x, ccs_y;
+
+			intel_tile_dims(fb, i, &tile_width, &tile_height);
+			tile_width *= hsub;
+			tile_height *= vsub;
+
+			ccs_x = (x * hsub) % tile_width;
+			ccs_y = (y * vsub) % tile_height;
+			main_x = intel_fb->normal[0].x % tile_width;
+			main_y = intel_fb->normal[0].y % tile_height;
+
+			/*
+			 * CCS doesn't have its own x/y offset register, so the intra CCS tile
+			 * x/y offsets must match between CCS and the main surface.
+			 */
+			if (main_x != ccs_x || main_y != ccs_y) {
+				DRM_DEBUG_KMS("Bad CCS x/y (main %d,%d ccs %d,%d) full (main %d,%d ccs %d,%d)\n",
+					      main_x, main_y,
+					      ccs_x, ccs_y,
+					      intel_fb->normal[0].x,
+					      intel_fb->normal[0].y,
+					      x, y);
+				return -EINVAL;
+			}
+		}
+
+		/*
+		 * The fence (if used) is aligned to the start of the object
+		 * so having the framebuffer wrap around across the edge of the
+		 * fenced region doesn't really work. We have no API to configure
+		 * the fence start offset within the object (nor could we probably
+		 * on gen2/3). So it's just easier if we just require that the
+		 * fb layout agrees with the fence layout. We already check that the
+		 * fb stride matches the fence stride elsewhere.
+		 */
+		if (i == 0 && i915_gem_object_is_tiled(obj) &&
+		    (x + width) * cpp > fb->pitches[i]) {
+			DRM_DEBUG_KMS("bad fb plane %d offset: 0x%x\n",
+				      i, fb->offsets[i]);
+			return -EINVAL;
+		}
+
+		/*
+		 * First pixel of the framebuffer from
+		 * the start of the normal gtt mapping.
+		 */
+		intel_fb->normal[i].x = x;
+		intel_fb->normal[i].y = y;
+
+		offset = intel_compute_aligned_offset(dev_priv, &x, &y, fb, i,
+						      fb->pitches[i],
+						      DRM_MODE_ROTATE_0,
+						      tile_size);
+		offset /= tile_size;
+
+		if (!is_surface_linear(fb->modifier, i)) {
+			unsigned int tile_width, tile_height;
+			unsigned int pitch_tiles;
+			struct drm_rect r;
+
+			intel_tile_dims(fb, i, &tile_width, &tile_height);
+
+			rot_info->plane[i].offset = offset;
+			rot_info->plane[i].stride = DIV_ROUND_UP(fb->pitches[i], tile_width * cpp);
+			rot_info->plane[i].width = DIV_ROUND_UP(x + width, tile_width);
+			rot_info->plane[i].height = DIV_ROUND_UP(y + height, tile_height);
+
+			intel_fb->rotated[i].pitch =
+				rot_info->plane[i].height * tile_height;
+
+			/* how many tiles does this plane need */
+			size = rot_info->plane[i].stride * rot_info->plane[i].height;
+			/*
+			 * If the plane isn't horizontally tile aligned,
+			 * we need one more tile.
+			 */
+			if (x != 0)
+				size++;
+
+			/* rotate the x/y offsets to match the GTT view */
+			r.x1 = x;
+			r.y1 = y;
+			r.x2 = x + width;
+			r.y2 = y + height;
+			drm_rect_rotate(&r,
+					rot_info->plane[i].width * tile_width,
+					rot_info->plane[i].height * tile_height,
+					DRM_MODE_ROTATE_270);
+			x = r.x1;
+			y = r.y1;
+
+			/* rotate the tile dimensions to match the GTT view */
+			pitch_tiles = intel_fb->rotated[i].pitch / tile_height;
+			swap(tile_width, tile_height);
+
+			/*
+			 * We only keep the x/y offsets, so push all of the
+			 * gtt offset into the x/y offsets.
+			 */
+			intel_adjust_tile_offset(&x, &y,
+						 tile_width, tile_height,
+						 tile_size, pitch_tiles,
+						 gtt_offset_rotated * tile_size, 0);
+
+			gtt_offset_rotated += rot_info->plane[i].width * rot_info->plane[i].height;
+
+			/*
+			 * First pixel of the framebuffer from
+			 * the start of the rotated gtt mapping.
+			 */
+			intel_fb->rotated[i].x = x;
+			intel_fb->rotated[i].y = y;
+		} else {
+			size = DIV_ROUND_UP((y + height) * fb->pitches[i] +
+					    x * cpp, tile_size);
+		}
+
+		/* how many tiles in total needed in the bo */
+		max_size = max(max_size, offset + size);
+	}
+
+	if (mul_u32_u32(max_size, tile_size) > obj->base.size) {
+		DRM_DEBUG_KMS("fb too big for bo (need %llu bytes, have %zu bytes)\n",
+			      mul_u32_u32(max_size, tile_size), obj->base.size);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void
+intel_plane_remap_gtt(struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	struct drm_framebuffer *fb = plane_state->base.fb;
+	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+	struct intel_rotation_info *info = &plane_state->view.rotated;
+	unsigned int rotation = plane_state->base.rotation;
+	int i, num_planes = fb->format->num_planes;
+	unsigned int tile_size = intel_tile_size(dev_priv);
+	unsigned int src_x, src_y;
+	unsigned int src_w, src_h;
+	u32 gtt_offset = 0;
+
+	memset(&plane_state->view, 0, sizeof(plane_state->view));
+	plane_state->view.type = drm_rotation_90_or_270(rotation) ?
+		I915_GGTT_VIEW_ROTATED : I915_GGTT_VIEW_REMAPPED;
+
+	src_x = plane_state->base.src.x1 >> 16;
+	src_y = plane_state->base.src.y1 >> 16;
+	src_w = drm_rect_width(&plane_state->base.src) >> 16;
+	src_h = drm_rect_height(&plane_state->base.src) >> 16;
+
+	WARN_ON(is_ccs_modifier(fb->modifier));
+
+	/* Make src coordinates relative to the viewport */
+	drm_rect_translate(&plane_state->base.src,
+			   -(src_x << 16), -(src_y << 16));
+
+	/* Rotate src coordinates to match rotated GTT view */
+	if (drm_rotation_90_or_270(rotation))
+		drm_rect_rotate(&plane_state->base.src,
+				src_w << 16, src_h << 16,
+				DRM_MODE_ROTATE_270);
+
+	for (i = 0; i < num_planes; i++) {
+		unsigned int hsub = i ? fb->format->hsub : 1;
+		unsigned int vsub = i ? fb->format->vsub : 1;
+		unsigned int cpp = fb->format->cpp[i];
+		unsigned int tile_width, tile_height;
+		unsigned int width, height;
+		unsigned int pitch_tiles;
+		unsigned int x, y;
+		u32 offset;
+
+		intel_tile_dims(fb, i, &tile_width, &tile_height);
+
+		x = src_x / hsub;
+		y = src_y / vsub;
+		width = src_w / hsub;
+		height = src_h / vsub;
+
+		/*
+		 * First pixel of the src viewport from the
+		 * start of the normal gtt mapping.
+		 */
+		x += intel_fb->normal[i].x;
+		y += intel_fb->normal[i].y;
+
+		offset = intel_compute_aligned_offset(dev_priv, &x, &y,
+						      fb, i, fb->pitches[i],
+						      DRM_MODE_ROTATE_0, tile_size);
+		offset /= tile_size;
+
+		info->plane[i].offset = offset;
+		info->plane[i].stride = DIV_ROUND_UP(fb->pitches[i],
+						     tile_width * cpp);
+		info->plane[i].width = DIV_ROUND_UP(x + width, tile_width);
+		info->plane[i].height = DIV_ROUND_UP(y + height, tile_height);
+
+		if (drm_rotation_90_or_270(rotation)) {
+			struct drm_rect r;
+
+			/* rotate the x/y offsets to match the GTT view */
+			r.x1 = x;
+			r.y1 = y;
+			r.x2 = x + width;
+			r.y2 = y + height;
+			drm_rect_rotate(&r,
+					info->plane[i].width * tile_width,
+					info->plane[i].height * tile_height,
+					DRM_MODE_ROTATE_270);
+			x = r.x1;
+			y = r.y1;
+
+			pitch_tiles = info->plane[i].height;
+			plane_state->color_plane[i].stride = pitch_tiles * tile_height;
+
+			/* rotate the tile dimensions to match the GTT view */
+			swap(tile_width, tile_height);
+		} else {
+			pitch_tiles = info->plane[i].width;
+			plane_state->color_plane[i].stride = pitch_tiles * tile_width * cpp;
+		}
+
+		/*
+		 * We only keep the x/y offsets, so push all of the
+		 * gtt offset into the x/y offsets.
+		 */
+		intel_adjust_tile_offset(&x, &y,
+					 tile_width, tile_height,
+					 tile_size, pitch_tiles,
+					 gtt_offset * tile_size, 0);
+
+		gtt_offset += info->plane[i].width * info->plane[i].height;
+
+		plane_state->color_plane[i].offset = 0;
+		plane_state->color_plane[i].x = x;
+		plane_state->color_plane[i].y = y;
+	}
+}
+
+static int
+intel_plane_compute_gtt(struct intel_plane_state *plane_state)
+{
+	const struct intel_framebuffer *fb =
+		to_intel_framebuffer(plane_state->base.fb);
+	unsigned int rotation = plane_state->base.rotation;
+	int i, num_planes;
+
+	if (!fb)
+		return 0;
+
+	num_planes = fb->base.format->num_planes;
+
+	if (intel_plane_needs_remap(plane_state)) {
+		intel_plane_remap_gtt(plane_state);
+
+		/*
+		 * Sometimes even remapping can't overcome
+		 * the stride limitations :( Can happen with
+		 * big plane sizes and suitably misaligned
+		 * offsets.
+		 */
+		return intel_plane_check_stride(plane_state);
+	}
+
+	intel_fill_fb_ggtt_view(&plane_state->view, &fb->base, rotation);
+
+	for (i = 0; i < num_planes; i++) {
+		plane_state->color_plane[i].stride = intel_fb_pitch(&fb->base, i, rotation);
+		plane_state->color_plane[i].offset = 0;
+
+		if (drm_rotation_90_or_270(rotation)) {
+			plane_state->color_plane[i].x = fb->rotated[i].x;
+			plane_state->color_plane[i].y = fb->rotated[i].y;
+		} else {
+			plane_state->color_plane[i].x = fb->normal[i].x;
+			plane_state->color_plane[i].y = fb->normal[i].y;
+		}
+	}
+
+	/* Rotate src coordinates to match rotated GTT view */
+	if (drm_rotation_90_or_270(rotation))
+		drm_rect_rotate(&plane_state->base.src,
+				fb->base.width << 16, fb->base.height << 16,
+				DRM_MODE_ROTATE_270);
+
+	return intel_plane_check_stride(plane_state);
+}
+
+static int i9xx_format_to_fourcc(int format)
+{
+	switch (format) {
+	case DISPPLANE_8BPP:
+		return DRM_FORMAT_C8;
+	case DISPPLANE_BGRX555:
+		return DRM_FORMAT_XRGB1555;
+	case DISPPLANE_BGRX565:
+		return DRM_FORMAT_RGB565;
+	default:
+	case DISPPLANE_BGRX888:
+		return DRM_FORMAT_XRGB8888;
+	case DISPPLANE_RGBX888:
+		return DRM_FORMAT_XBGR8888;
+	case DISPPLANE_BGRX101010:
+		return DRM_FORMAT_XRGB2101010;
+	case DISPPLANE_RGBX101010:
+		return DRM_FORMAT_XBGR2101010;
+	}
+}
+
+int skl_format_to_fourcc(int format, bool rgb_order, bool alpha)
+{
+	switch (format) {
+	case PLANE_CTL_FORMAT_RGB_565:
+		return DRM_FORMAT_RGB565;
+	case PLANE_CTL_FORMAT_NV12:
+		return DRM_FORMAT_NV12;
+	case PLANE_CTL_FORMAT_P010:
+		return DRM_FORMAT_P010;
+	case PLANE_CTL_FORMAT_P012:
+		return DRM_FORMAT_P012;
+	case PLANE_CTL_FORMAT_P016:
+		return DRM_FORMAT_P016;
+	case PLANE_CTL_FORMAT_Y210:
+		return DRM_FORMAT_Y210;
+	case PLANE_CTL_FORMAT_Y212:
+		return DRM_FORMAT_Y212;
+	case PLANE_CTL_FORMAT_Y216:
+		return DRM_FORMAT_Y216;
+	case PLANE_CTL_FORMAT_Y410:
+		return DRM_FORMAT_XVYU2101010;
+	case PLANE_CTL_FORMAT_Y412:
+		return DRM_FORMAT_XVYU12_16161616;
+	case PLANE_CTL_FORMAT_Y416:
+		return DRM_FORMAT_XVYU16161616;
+	default:
+	case PLANE_CTL_FORMAT_XRGB_8888:
+		if (rgb_order) {
+			if (alpha)
+				return DRM_FORMAT_ABGR8888;
+			else
+				return DRM_FORMAT_XBGR8888;
+		} else {
+			if (alpha)
+				return DRM_FORMAT_ARGB8888;
+			else
+				return DRM_FORMAT_XRGB8888;
+		}
+	case PLANE_CTL_FORMAT_XRGB_2101010:
+		if (rgb_order)
+			return DRM_FORMAT_XBGR2101010;
+		else
+			return DRM_FORMAT_XRGB2101010;
+	case PLANE_CTL_FORMAT_XRGB_16161616F:
+		if (rgb_order) {
+			if (alpha)
+				return DRM_FORMAT_ABGR16161616F;
+			else
+				return DRM_FORMAT_XBGR16161616F;
+		} else {
+			if (alpha)
+				return DRM_FORMAT_ARGB16161616F;
+			else
+				return DRM_FORMAT_XRGB16161616F;
+		}
+	}
+}
+
+static bool
+intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
+			      struct intel_initial_plane_config *plane_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_i915_gem_object *obj = NULL;
+	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
+	struct drm_framebuffer *fb = &plane_config->fb->base;
+	u32 base_aligned = round_down(plane_config->base, PAGE_SIZE);
+	u32 size_aligned = round_up(plane_config->base + plane_config->size,
+				    PAGE_SIZE);
+
+	size_aligned -= base_aligned;
+
+	if (plane_config->size == 0)
+		return false;
+
+	/* If the FB is too big, just don't use it since fbdev is not very
+	 * important and we should probably use that space with FBC or other
+	 * features. */
+	if (size_aligned * 2 > dev_priv->stolen_usable_size)
+		return false;
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+	case I915_FORMAT_MOD_Y_TILED:
+		break;
+	default:
+		DRM_DEBUG_DRIVER("Unsupported modifier for initial FB: 0x%llx\n",
+				 fb->modifier);
+		return false;
+	}
+
+	mutex_lock(&dev->struct_mutex);
+	obj = i915_gem_object_create_stolen_for_preallocated(dev_priv,
+							     base_aligned,
+							     base_aligned,
+							     size_aligned);
+	mutex_unlock(&dev->struct_mutex);
+	if (!obj)
+		return false;
+
+	switch (plane_config->tiling) {
+	case I915_TILING_NONE:
+		break;
+	case I915_TILING_X:
+	case I915_TILING_Y:
+		obj->tiling_and_stride = fb->pitches[0] | plane_config->tiling;
+		break;
+	default:
+		MISSING_CASE(plane_config->tiling);
+		return false;
+	}
+
+	mode_cmd.pixel_format = fb->format->format;
+	mode_cmd.width = fb->width;
+	mode_cmd.height = fb->height;
+	mode_cmd.pitches[0] = fb->pitches[0];
+	mode_cmd.modifier[0] = fb->modifier;
+	mode_cmd.flags = DRM_MODE_FB_MODIFIERS;
+
+	if (intel_framebuffer_init(to_intel_framebuffer(fb), obj, &mode_cmd)) {
+		DRM_DEBUG_KMS("intel fb init failed\n");
+		goto out_unref_obj;
+	}
+
+
+	DRM_DEBUG_KMS("initial plane fb obj %p\n", obj);
+	return true;
+
+out_unref_obj:
+	i915_gem_object_put(obj);
+	return false;
+}
+
+static void
+intel_set_plane_visible(struct intel_crtc_state *crtc_state,
+			struct intel_plane_state *plane_state,
+			bool visible)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+
+	plane_state->base.visible = visible;
+
+	if (visible)
+		crtc_state->base.plane_mask |= drm_plane_mask(&plane->base);
+	else
+		crtc_state->base.plane_mask &= ~drm_plane_mask(&plane->base);
+}
+
+static void fixup_active_planes(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	struct drm_plane *plane;
+
+	/*
+	 * Active_planes aliases if multiple "primary" or cursor planes
+	 * have been used on the same (or wrong) pipe. plane_mask uses
+	 * unique ids, hence we can use that to reconstruct active_planes.
+	 */
+	crtc_state->active_planes = 0;
+
+	drm_for_each_plane_mask(plane, &dev_priv->drm,
+				crtc_state->base.plane_mask)
+		crtc_state->active_planes |= BIT(to_intel_plane(plane)->id);
+}
+
+static void intel_plane_disable_noatomic(struct intel_crtc *crtc,
+					 struct intel_plane *plane)
+{
+	struct intel_crtc_state *crtc_state =
+		to_intel_crtc_state(crtc->base.state);
+	struct intel_plane_state *plane_state =
+		to_intel_plane_state(plane->base.state);
+
+	DRM_DEBUG_KMS("Disabling [PLANE:%d:%s] on [CRTC:%d:%s]\n",
+		      plane->base.base.id, plane->base.name,
+		      crtc->base.base.id, crtc->base.name);
+
+	intel_set_plane_visible(crtc_state, plane_state, false);
+	fixup_active_planes(crtc_state);
+	crtc_state->data_rate[plane->id] = 0;
+
+	if (plane->id == PLANE_PRIMARY)
+		intel_pre_disable_primary_noatomic(&crtc->base);
+
+	intel_disable_plane(plane, crtc_state);
+}
+
+static void
+intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
+			     struct intel_initial_plane_config *plane_config)
+{
+	struct drm_device *dev = intel_crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_crtc *c;
+	struct drm_i915_gem_object *obj;
+	struct drm_plane *primary = intel_crtc->base.primary;
+	struct drm_plane_state *plane_state = primary->state;
+	struct intel_plane *intel_plane = to_intel_plane(primary);
+	struct intel_plane_state *intel_state =
+		to_intel_plane_state(plane_state);
+	struct drm_framebuffer *fb;
+
+	if (!plane_config->fb)
+		return;
+
+	if (intel_alloc_initial_plane_obj(intel_crtc, plane_config)) {
+		fb = &plane_config->fb->base;
+		goto valid_fb;
+	}
+
+	kfree(plane_config->fb);
+
+	/*
+	 * Failed to alloc the obj, check to see if we should share
+	 * an fb with another CRTC instead
+	 */
+	for_each_crtc(dev, c) {
+		struct intel_plane_state *state;
+
+		if (c == &intel_crtc->base)
+			continue;
+
+		if (!to_intel_crtc(c)->active)
+			continue;
+
+		state = to_intel_plane_state(c->primary->state);
+		if (!state->vma)
+			continue;
+
+		if (intel_plane_ggtt_offset(state) == plane_config->base) {
+			fb = state->base.fb;
+			drm_framebuffer_get(fb);
+			goto valid_fb;
+		}
+	}
+
+	/*
+	 * We've failed to reconstruct the BIOS FB.  Current display state
+	 * indicates that the primary plane is visible, but has a NULL FB,
+	 * which will lead to problems later if we don't fix it up.  The
+	 * simplest solution is to just disable the primary plane now and
+	 * pretend the BIOS never had it enabled.
+	 */
+	intel_plane_disable_noatomic(intel_crtc, intel_plane);
+
+	return;
+
+valid_fb:
+	intel_state->base.rotation = plane_config->rotation;
+	intel_fill_fb_ggtt_view(&intel_state->view, fb,
+				intel_state->base.rotation);
+	intel_state->color_plane[0].stride =
+		intel_fb_pitch(fb, 0, intel_state->base.rotation);
+
+	mutex_lock(&dev->struct_mutex);
+	intel_state->vma =
+		intel_pin_and_fence_fb_obj(fb,
+					   &intel_state->view,
+					   intel_plane_uses_fence(intel_state),
+					   &intel_state->flags);
+	mutex_unlock(&dev->struct_mutex);
+	if (IS_ERR(intel_state->vma)) {
+		DRM_ERROR("failed to pin boot fb on pipe %d: %li\n",
+			  intel_crtc->pipe, PTR_ERR(intel_state->vma));
+
+		intel_state->vma = NULL;
+		drm_framebuffer_put(fb);
+		return;
+	}
+
+	obj = intel_fb_obj(fb);
+	intel_fb_obj_flush(obj, ORIGIN_DIRTYFB);
+
+	plane_state->src_x = 0;
+	plane_state->src_y = 0;
+	plane_state->src_w = fb->width << 16;
+	plane_state->src_h = fb->height << 16;
+
+	plane_state->crtc_x = 0;
+	plane_state->crtc_y = 0;
+	plane_state->crtc_w = fb->width;
+	plane_state->crtc_h = fb->height;
+
+	intel_state->base.src = drm_plane_state_src(plane_state);
+	intel_state->base.dst = drm_plane_state_dest(plane_state);
+
+	if (i915_gem_object_is_tiled(obj))
+		dev_priv->preserve_bios_swizzle = true;
+
+	plane_state->fb = fb;
+	plane_state->crtc = &intel_crtc->base;
+
+	atomic_or(to_intel_plane(primary)->frontbuffer_bit,
+		  &obj->frontbuffer_bits);
+}
+
+static int skl_max_plane_width(const struct drm_framebuffer *fb,
+			       int color_plane,
+			       unsigned int rotation)
+{
+	int cpp = fb->format->cpp[color_plane];
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		return 4096;
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+		/* FIXME AUX plane? */
+	case I915_FORMAT_MOD_Y_TILED:
+	case I915_FORMAT_MOD_Yf_TILED:
+		if (cpp == 8)
+			return 2048;
+		else
+			return 4096;
+	default:
+		MISSING_CASE(fb->modifier);
+		return 2048;
+	}
+}
+
+static int glk_max_plane_width(const struct drm_framebuffer *fb,
+			       int color_plane,
+			       unsigned int rotation)
+{
+	int cpp = fb->format->cpp[color_plane];
+
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		if (cpp == 8)
+			return 4096;
+		else
+			return 5120;
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+		/* FIXME AUX plane? */
+	case I915_FORMAT_MOD_Y_TILED:
+	case I915_FORMAT_MOD_Yf_TILED:
+		if (cpp == 8)
+			return 2048;
+		else
+			return 5120;
+	default:
+		MISSING_CASE(fb->modifier);
+		return 2048;
+	}
+}
+
+static int icl_max_plane_width(const struct drm_framebuffer *fb,
+			       int color_plane,
+			       unsigned int rotation)
+{
+	return 5120;
+}
+
+static bool skl_check_main_ccs_coordinates(struct intel_plane_state *plane_state,
+					   int main_x, int main_y, u32 main_offset)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int hsub = fb->format->hsub;
+	int vsub = fb->format->vsub;
+	int aux_x = plane_state->color_plane[1].x;
+	int aux_y = plane_state->color_plane[1].y;
+	u32 aux_offset = plane_state->color_plane[1].offset;
+	u32 alignment = intel_surf_alignment(fb, 1);
+
+	while (aux_offset >= main_offset && aux_y <= main_y) {
+		int x, y;
+
+		if (aux_x == main_x && aux_y == main_y)
+			break;
+
+		if (aux_offset == 0)
+			break;
+
+		x = aux_x / hsub;
+		y = aux_y / vsub;
+		aux_offset = intel_plane_adjust_aligned_offset(&x, &y, plane_state, 1,
+							       aux_offset, aux_offset - alignment);
+		aux_x = x * hsub + aux_x % hsub;
+		aux_y = y * vsub + aux_y % vsub;
+	}
+
+	if (aux_x != main_x || aux_y != main_y)
+		return false;
+
+	plane_state->color_plane[1].offset = aux_offset;
+	plane_state->color_plane[1].x = aux_x;
+	plane_state->color_plane[1].y = aux_y;
+
+	return true;
+}
+
+static int skl_check_main_surface(struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	int x = plane_state->base.src.x1 >> 16;
+	int y = plane_state->base.src.y1 >> 16;
+	int w = drm_rect_width(&plane_state->base.src) >> 16;
+	int h = drm_rect_height(&plane_state->base.src) >> 16;
+	int max_width;
+	int max_height = 4096;
+	u32 alignment, offset, aux_offset = plane_state->color_plane[1].offset;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		max_width = icl_max_plane_width(fb, 0, rotation);
+	else if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		max_width = glk_max_plane_width(fb, 0, rotation);
+	else
+		max_width = skl_max_plane_width(fb, 0, rotation);
+
+	if (w > max_width || h > max_height) {
+		DRM_DEBUG_KMS("requested Y/RGB source size %dx%d too big (limit %dx%d)\n",
+			      w, h, max_width, max_height);
+		return -EINVAL;
+	}
+
+	intel_add_fb_offsets(&x, &y, plane_state, 0);
+	offset = intel_plane_compute_aligned_offset(&x, &y, plane_state, 0);
+	alignment = intel_surf_alignment(fb, 0);
+
+	/*
+	 * AUX surface offset is specified as the distance from the
+	 * main surface offset, and it must be non-negative. Make
+	 * sure that is what we will get.
+	 */
+	if (offset > aux_offset)
+		offset = intel_plane_adjust_aligned_offset(&x, &y, plane_state, 0,
+							   offset, aux_offset & ~(alignment - 1));
+
+	/*
+	 * When using an X-tiled surface, the plane blows up
+	 * if the x offset + width exceed the stride.
+	 *
+	 * TODO: linear and Y-tiled seem fine, Yf untested,
+	 */
+	if (fb->modifier == I915_FORMAT_MOD_X_TILED) {
+		int cpp = fb->format->cpp[0];
+
+		while ((x + w) * cpp > plane_state->color_plane[0].stride) {
+			if (offset == 0) {
+				DRM_DEBUG_KMS("Unable to find suitable display surface offset due to X-tiling\n");
+				return -EINVAL;
+			}
+
+			offset = intel_plane_adjust_aligned_offset(&x, &y, plane_state, 0,
+								   offset, offset - alignment);
+		}
+	}
+
+	/*
+	 * CCS AUX surface doesn't have its own x/y offsets, we must make sure
+	 * they match with the main surface x/y offsets.
+	 */
+	if (is_ccs_modifier(fb->modifier)) {
+		while (!skl_check_main_ccs_coordinates(plane_state, x, y, offset)) {
+			if (offset == 0)
+				break;
+
+			offset = intel_plane_adjust_aligned_offset(&x, &y, plane_state, 0,
+								   offset, offset - alignment);
+		}
+
+		if (x != plane_state->color_plane[1].x || y != plane_state->color_plane[1].y) {
+			DRM_DEBUG_KMS("Unable to find suitable display surface offset due to CCS\n");
+			return -EINVAL;
+		}
+	}
+
+	plane_state->color_plane[0].offset = offset;
+	plane_state->color_plane[0].x = x;
+	plane_state->color_plane[0].y = y;
+
+	/*
+	 * Put the final coordinates back so that the src
+	 * coordinate checks will see the right values.
+	 */
+	drm_rect_translate(&plane_state->base.src,
+			   (x << 16) - plane_state->base.src.x1,
+			   (y << 16) - plane_state->base.src.y1);
+
+	return 0;
+}
+
+static int skl_check_nv12_aux_surface(struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	int max_width = skl_max_plane_width(fb, 1, rotation);
+	int max_height = 4096;
+	int x = plane_state->base.src.x1 >> 17;
+	int y = plane_state->base.src.y1 >> 17;
+	int w = drm_rect_width(&plane_state->base.src) >> 17;
+	int h = drm_rect_height(&plane_state->base.src) >> 17;
+	u32 offset;
+
+	intel_add_fb_offsets(&x, &y, plane_state, 1);
+	offset = intel_plane_compute_aligned_offset(&x, &y, plane_state, 1);
+
+	/* FIXME not quite sure how/if these apply to the chroma plane */
+	if (w > max_width || h > max_height) {
+		DRM_DEBUG_KMS("CbCr source size %dx%d too big (limit %dx%d)\n",
+			      w, h, max_width, max_height);
+		return -EINVAL;
+	}
+
+	plane_state->color_plane[1].offset = offset;
+	plane_state->color_plane[1].x = x;
+	plane_state->color_plane[1].y = y;
+
+	return 0;
+}
+
+static int skl_check_ccs_aux_surface(struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int src_x = plane_state->base.src.x1 >> 16;
+	int src_y = plane_state->base.src.y1 >> 16;
+	int hsub = fb->format->hsub;
+	int vsub = fb->format->vsub;
+	int x = src_x / hsub;
+	int y = src_y / vsub;
+	u32 offset;
+
+	intel_add_fb_offsets(&x, &y, plane_state, 1);
+	offset = intel_plane_compute_aligned_offset(&x, &y, plane_state, 1);
+
+	plane_state->color_plane[1].offset = offset;
+	plane_state->color_plane[1].x = x * hsub + src_x % hsub;
+	plane_state->color_plane[1].y = y * vsub + src_y % vsub;
+
+	return 0;
+}
+
+int skl_check_plane_surface(struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int ret;
+
+	ret = intel_plane_compute_gtt(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	/*
+	 * Handle the AUX surface first since
+	 * the main surface setup depends on it.
+	 */
+	if (is_planar_yuv_format(fb->format->format)) {
+		ret = skl_check_nv12_aux_surface(plane_state);
+		if (ret)
+			return ret;
+	} else if (is_ccs_modifier(fb->modifier)) {
+		ret = skl_check_ccs_aux_surface(plane_state);
+		if (ret)
+			return ret;
+	} else {
+		plane_state->color_plane[1].offset = ~0xfff;
+		plane_state->color_plane[1].x = 0;
+		plane_state->color_plane[1].y = 0;
+	}
+
+	ret = skl_check_main_surface(plane_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+unsigned int
+i9xx_plane_max_stride(struct intel_plane *plane,
+		      u32 pixel_format, u64 modifier,
+		      unsigned int rotation)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+
+	if (!HAS_GMCH(dev_priv)) {
+		return 32*1024;
+	} else if (INTEL_GEN(dev_priv) >= 4) {
+		if (modifier == I915_FORMAT_MOD_X_TILED)
+			return 16*1024;
+		else
+			return 32*1024;
+	} else if (INTEL_GEN(dev_priv) >= 3) {
+		if (modifier == I915_FORMAT_MOD_X_TILED)
+			return 8*1024;
+		else
+			return 16*1024;
+	} else {
+		if (plane->i9xx_plane == PLANE_C)
+			return 4*1024;
+		else
+			return 8*1024;
+	}
+}
+
+static u32 i9xx_plane_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 dspcntr = 0;
+
+	if (crtc_state->gamma_enable)
+		dspcntr |= DISPPLANE_GAMMA_ENABLE;
+
+	if (crtc_state->csc_enable)
+		dspcntr |= DISPPLANE_PIPE_CSC_ENABLE;
+
+	if (INTEL_GEN(dev_priv) < 5)
+		dspcntr |= DISPPLANE_SEL_PIPE(crtc->pipe);
+
+	return dspcntr;
+}
+
+static u32 i9xx_plane_ctl(const struct intel_crtc_state *crtc_state,
+			  const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	u32 dspcntr;
+
+	dspcntr = DISPLAY_PLANE_ENABLE;
+
+	if (IS_G4X(dev_priv) || IS_GEN(dev_priv, 5) ||
+	    IS_GEN(dev_priv, 6) || IS_IVYBRIDGE(dev_priv))
+		dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
+
+	switch (fb->format->format) {
+	case DRM_FORMAT_C8:
+		dspcntr |= DISPPLANE_8BPP;
+		break;
+	case DRM_FORMAT_XRGB1555:
+		dspcntr |= DISPPLANE_BGRX555;
+		break;
+	case DRM_FORMAT_RGB565:
+		dspcntr |= DISPPLANE_BGRX565;
+		break;
+	case DRM_FORMAT_XRGB8888:
+		dspcntr |= DISPPLANE_BGRX888;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		dspcntr |= DISPPLANE_RGBX888;
+		break;
+	case DRM_FORMAT_XRGB2101010:
+		dspcntr |= DISPPLANE_BGRX101010;
+		break;
+	case DRM_FORMAT_XBGR2101010:
+		dspcntr |= DISPPLANE_RGBX101010;
+		break;
+	default:
+		MISSING_CASE(fb->format->format);
+		return 0;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 4 &&
+	    fb->modifier == I915_FORMAT_MOD_X_TILED)
+		dspcntr |= DISPPLANE_TILED;
+
+	if (rotation & DRM_MODE_ROTATE_180)
+		dspcntr |= DISPPLANE_ROTATE_180;
+
+	if (rotation & DRM_MODE_REFLECT_X)
+		dspcntr |= DISPPLANE_MIRROR;
+
+	return dspcntr;
+}
+
+int i9xx_check_plane_surface(struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	int src_x, src_y;
+	u32 offset;
+	int ret;
+
+	ret = intel_plane_compute_gtt(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	src_x = plane_state->base.src.x1 >> 16;
+	src_y = plane_state->base.src.y1 >> 16;
+
+	intel_add_fb_offsets(&src_x, &src_y, plane_state, 0);
+
+	if (INTEL_GEN(dev_priv) >= 4)
+		offset = intel_plane_compute_aligned_offset(&src_x, &src_y,
+							    plane_state, 0);
+	else
+		offset = 0;
+
+	/*
+	 * Put the final coordinates back so that the src
+	 * coordinate checks will see the right values.
+	 */
+	drm_rect_translate(&plane_state->base.src,
+			   (src_x << 16) - plane_state->base.src.x1,
+			   (src_y << 16) - plane_state->base.src.y1);
+
+	/* HSW/BDW do this automagically in hardware */
+	if (!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv)) {
+		unsigned int rotation = plane_state->base.rotation;
+		int src_w = drm_rect_width(&plane_state->base.src) >> 16;
+		int src_h = drm_rect_height(&plane_state->base.src) >> 16;
+
+		if (rotation & DRM_MODE_ROTATE_180) {
+			src_x += src_w - 1;
+			src_y += src_h - 1;
+		} else if (rotation & DRM_MODE_REFLECT_X) {
+			src_x += src_w - 1;
+		}
+	}
+
+	plane_state->color_plane[0].offset = offset;
+	plane_state->color_plane[0].x = src_x;
+	plane_state->color_plane[0].y = src_y;
+
+	return 0;
+}
+
+static int
+i9xx_plane_check(struct intel_crtc_state *crtc_state,
+		 struct intel_plane_state *plane_state)
+{
+	int ret;
+
+	ret = chv_plane_check_rotation(plane_state);
+	if (ret)
+		return ret;
+
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
+						  &crtc_state->base,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  false, true);
+	if (ret)
+		return ret;
+
+	ret = i9xx_check_plane_surface(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
+
+	plane_state->ctl = i9xx_plane_ctl(crtc_state, plane_state);
+
+	return 0;
+}
+
+static void i9xx_update_plane(struct intel_plane *plane,
+			      const struct intel_crtc_state *crtc_state,
+			      const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
+	u32 linear_offset;
+	int x = plane_state->color_plane[0].x;
+	int y = plane_state->color_plane[0].y;
+	unsigned long irqflags;
+	u32 dspaddr_offset;
+	u32 dspcntr;
+
+	dspcntr = plane_state->ctl | i9xx_plane_ctl_crtc(crtc_state);
+
+	linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
+
+	if (INTEL_GEN(dev_priv) >= 4)
+		dspaddr_offset = plane_state->color_plane[0].offset;
+	else
+		dspaddr_offset = linear_offset;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(DSPSTRIDE(i9xx_plane), plane_state->color_plane[0].stride);
+
+	if (INTEL_GEN(dev_priv) < 4) {
+		/* pipesrc and dspsize control the size that is scaled from,
+		 * which should always be the user's requested size.
+		 */
+		I915_WRITE_FW(DSPPOS(i9xx_plane), 0);
+		I915_WRITE_FW(DSPSIZE(i9xx_plane),
+			      ((crtc_state->pipe_src_h - 1) << 16) |
+			      (crtc_state->pipe_src_w - 1));
+	} else if (IS_CHERRYVIEW(dev_priv) && i9xx_plane == PLANE_B) {
+		I915_WRITE_FW(PRIMPOS(i9xx_plane), 0);
+		I915_WRITE_FW(PRIMSIZE(i9xx_plane),
+			      ((crtc_state->pipe_src_h - 1) << 16) |
+			      (crtc_state->pipe_src_w - 1));
+		I915_WRITE_FW(PRIMCNSTALPHA(i9xx_plane), 0);
+	}
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		I915_WRITE_FW(DSPOFFSET(i9xx_plane), (y << 16) | x);
+	} else if (INTEL_GEN(dev_priv) >= 4) {
+		I915_WRITE_FW(DSPLINOFF(i9xx_plane), linear_offset);
+		I915_WRITE_FW(DSPTILEOFF(i9xx_plane), (y << 16) | x);
+	}
+
+	/*
+	 * The control register self-arms if the plane was previously
+	 * disabled. Try to make the plane enable atomic by writing
+	 * the control register just before the surface register.
+	 */
+	I915_WRITE_FW(DSPCNTR(i9xx_plane), dspcntr);
+	if (INTEL_GEN(dev_priv) >= 4)
+		I915_WRITE_FW(DSPSURF(i9xx_plane),
+			      intel_plane_ggtt_offset(plane_state) +
+			      dspaddr_offset);
+	else
+		I915_WRITE_FW(DSPADDR(i9xx_plane),
+			      intel_plane_ggtt_offset(plane_state) +
+			      dspaddr_offset);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void i9xx_disable_plane(struct intel_plane *plane,
+			       const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
+	unsigned long irqflags;
+	u32 dspcntr;
+
+	/*
+	 * DSPCNTR pipe gamma enable on g4x+ and pipe csc
+	 * enable on ilk+ affect the pipe bottom color as
+	 * well, so we must configure them even if the plane
+	 * is disabled.
+	 *
+	 * On pre-g4x there is no way to gamma correct the
+	 * pipe bottom color but we'll keep on doing this
+	 * anyway so that the crtc state readout works correctly.
+	 */
+	dspcntr = i9xx_plane_ctl_crtc(crtc_state);
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(DSPCNTR(i9xx_plane), dspcntr);
+	if (INTEL_GEN(dev_priv) >= 4)
+		I915_WRITE_FW(DSPSURF(i9xx_plane), 0);
+	else
+		I915_WRITE_FW(DSPADDR(i9xx_plane), 0);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static bool i9xx_plane_get_hw_state(struct intel_plane *plane,
+				    enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
+	intel_wakeref_t wakeref;
+	bool ret;
+	u32 val;
+
+	/*
+	 * Not 100% correct for planes that can move between pipes,
+	 * but that's only the case for gen2-4 which don't have any
+	 * display power wells.
+	 */
+	power_domain = POWER_DOMAIN_PIPE(plane->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(DSPCNTR(i9xx_plane));
+
+	ret = val & DISPLAY_PLANE_ENABLE;
+
+	if (INTEL_GEN(dev_priv) >= 5)
+		*pipe = plane->pipe;
+	else
+		*pipe = (val & DISPPLANE_SEL_PIPE_MASK) >>
+			DISPPLANE_SEL_PIPE_SHIFT;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static void skl_detach_scaler(struct intel_crtc *intel_crtc, int id)
+{
+	struct drm_device *dev = intel_crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	I915_WRITE(SKL_PS_CTRL(intel_crtc->pipe, id), 0);
+	I915_WRITE(SKL_PS_WIN_POS(intel_crtc->pipe, id), 0);
+	I915_WRITE(SKL_PS_WIN_SZ(intel_crtc->pipe, id), 0);
+}
+
+/*
+ * This function detaches (aka. unbinds) unused scalers in hardware
+ */
+static void skl_detach_scalers(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct intel_crtc_scaler_state *scaler_state =
+		&crtc_state->scaler_state;
+	int i;
+
+	/* loop through and disable scalers that aren't in use */
+	for (i = 0; i < intel_crtc->num_scalers; i++) {
+		if (!scaler_state->scalers[i].in_use)
+			skl_detach_scaler(intel_crtc, i);
+	}
+}
+
+static unsigned int skl_plane_stride_mult(const struct drm_framebuffer *fb,
+					  int color_plane, unsigned int rotation)
+{
+	/*
+	 * The stride is either expressed as a multiple of 64 bytes chunks for
+	 * linear buffers or in number of tiles for tiled buffers.
+	 */
+	if (fb->modifier == DRM_FORMAT_MOD_LINEAR)
+		return 64;
+	else if (drm_rotation_90_or_270(rotation))
+		return intel_tile_height(fb, color_plane);
+	else
+		return intel_tile_width_bytes(fb, color_plane);
+}
+
+u32 skl_plane_stride(const struct intel_plane_state *plane_state,
+		     int color_plane)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	u32 stride = plane_state->color_plane[color_plane].stride;
+
+	if (color_plane >= fb->format->num_planes)
+		return 0;
+
+	return stride / skl_plane_stride_mult(fb, color_plane, rotation);
+}
+
+static u32 skl_plane_ctl_format(u32 pixel_format)
+{
+	switch (pixel_format) {
+	case DRM_FORMAT_C8:
+		return PLANE_CTL_FORMAT_INDEXED;
+	case DRM_FORMAT_RGB565:
+		return PLANE_CTL_FORMAT_RGB_565;
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_ABGR8888:
+		return PLANE_CTL_FORMAT_XRGB_8888 | PLANE_CTL_ORDER_RGBX;
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_ARGB8888:
+		return PLANE_CTL_FORMAT_XRGB_8888;
+	case DRM_FORMAT_XRGB2101010:
+		return PLANE_CTL_FORMAT_XRGB_2101010;
+	case DRM_FORMAT_XBGR2101010:
+		return PLANE_CTL_ORDER_RGBX | PLANE_CTL_FORMAT_XRGB_2101010;
+	case DRM_FORMAT_XBGR16161616F:
+	case DRM_FORMAT_ABGR16161616F:
+		return PLANE_CTL_FORMAT_XRGB_16161616F | PLANE_CTL_ORDER_RGBX;
+	case DRM_FORMAT_XRGB16161616F:
+	case DRM_FORMAT_ARGB16161616F:
+		return PLANE_CTL_FORMAT_XRGB_16161616F;
+	case DRM_FORMAT_YUYV:
+		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_YUYV;
+	case DRM_FORMAT_YVYU:
+		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_YVYU;
+	case DRM_FORMAT_UYVY:
+		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_UYVY;
+	case DRM_FORMAT_VYUY:
+		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_VYUY;
+	case DRM_FORMAT_NV12:
+		return PLANE_CTL_FORMAT_NV12;
+	case DRM_FORMAT_P010:
+		return PLANE_CTL_FORMAT_P010;
+	case DRM_FORMAT_P012:
+		return PLANE_CTL_FORMAT_P012;
+	case DRM_FORMAT_P016:
+		return PLANE_CTL_FORMAT_P016;
+	case DRM_FORMAT_Y210:
+		return PLANE_CTL_FORMAT_Y210;
+	case DRM_FORMAT_Y212:
+		return PLANE_CTL_FORMAT_Y212;
+	case DRM_FORMAT_Y216:
+		return PLANE_CTL_FORMAT_Y216;
+	case DRM_FORMAT_XVYU2101010:
+		return PLANE_CTL_FORMAT_Y410;
+	case DRM_FORMAT_XVYU12_16161616:
+		return PLANE_CTL_FORMAT_Y412;
+	case DRM_FORMAT_XVYU16161616:
+		return PLANE_CTL_FORMAT_Y416;
+	default:
+		MISSING_CASE(pixel_format);
+	}
+
+	return 0;
+}
+
+static u32 skl_plane_ctl_alpha(const struct intel_plane_state *plane_state)
+{
+	if (!plane_state->base.fb->format->has_alpha)
+		return PLANE_CTL_ALPHA_DISABLE;
+
+	switch (plane_state->base.pixel_blend_mode) {
+	case DRM_MODE_BLEND_PIXEL_NONE:
+		return PLANE_CTL_ALPHA_DISABLE;
+	case DRM_MODE_BLEND_PREMULTI:
+		return PLANE_CTL_ALPHA_SW_PREMULTIPLY;
+	case DRM_MODE_BLEND_COVERAGE:
+		return PLANE_CTL_ALPHA_HW_PREMULTIPLY;
+	default:
+		MISSING_CASE(plane_state->base.pixel_blend_mode);
+		return PLANE_CTL_ALPHA_DISABLE;
+	}
+}
+
+static u32 glk_plane_color_ctl_alpha(const struct intel_plane_state *plane_state)
+{
+	if (!plane_state->base.fb->format->has_alpha)
+		return PLANE_COLOR_ALPHA_DISABLE;
+
+	switch (plane_state->base.pixel_blend_mode) {
+	case DRM_MODE_BLEND_PIXEL_NONE:
+		return PLANE_COLOR_ALPHA_DISABLE;
+	case DRM_MODE_BLEND_PREMULTI:
+		return PLANE_COLOR_ALPHA_SW_PREMULTIPLY;
+	case DRM_MODE_BLEND_COVERAGE:
+		return PLANE_COLOR_ALPHA_HW_PREMULTIPLY;
+	default:
+		MISSING_CASE(plane_state->base.pixel_blend_mode);
+		return PLANE_COLOR_ALPHA_DISABLE;
+	}
+}
+
+static u32 skl_plane_ctl_tiling(u64 fb_modifier)
+{
+	switch (fb_modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+		break;
+	case I915_FORMAT_MOD_X_TILED:
+		return PLANE_CTL_TILED_X;
+	case I915_FORMAT_MOD_Y_TILED:
+		return PLANE_CTL_TILED_Y;
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+		return PLANE_CTL_TILED_Y | PLANE_CTL_RENDER_DECOMPRESSION_ENABLE;
+	case I915_FORMAT_MOD_Yf_TILED:
+		return PLANE_CTL_TILED_YF;
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+		return PLANE_CTL_TILED_YF | PLANE_CTL_RENDER_DECOMPRESSION_ENABLE;
+	default:
+		MISSING_CASE(fb_modifier);
+	}
+
+	return 0;
+}
+
+static u32 skl_plane_ctl_rotate(unsigned int rotate)
+{
+	switch (rotate) {
+	case DRM_MODE_ROTATE_0:
+		break;
+	/*
+	 * DRM_MODE_ROTATE_ is counter clockwise to stay compatible with Xrandr
+	 * while i915 HW rotation is clockwise, thats why this swapping.
+	 */
+	case DRM_MODE_ROTATE_90:
+		return PLANE_CTL_ROTATE_270;
+	case DRM_MODE_ROTATE_180:
+		return PLANE_CTL_ROTATE_180;
+	case DRM_MODE_ROTATE_270:
+		return PLANE_CTL_ROTATE_90;
+	default:
+		MISSING_CASE(rotate);
+	}
+
+	return 0;
+}
+
+static u32 cnl_plane_ctl_flip(unsigned int reflect)
+{
+	switch (reflect) {
+	case 0:
+		break;
+	case DRM_MODE_REFLECT_X:
+		return PLANE_CTL_FLIP_HORIZONTAL;
+	case DRM_MODE_REFLECT_Y:
+	default:
+		MISSING_CASE(reflect);
+	}
+
+	return 0;
+}
+
+u32 skl_plane_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	u32 plane_ctl = 0;
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		return plane_ctl;
+
+	if (crtc_state->gamma_enable)
+		plane_ctl |= PLANE_CTL_PIPE_GAMMA_ENABLE;
+
+	if (crtc_state->csc_enable)
+		plane_ctl |= PLANE_CTL_PIPE_CSC_ENABLE;
+
+	return plane_ctl;
+}
+
+u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
+		  const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	u32 plane_ctl;
+
+	plane_ctl = PLANE_CTL_ENABLE;
+
+	if (INTEL_GEN(dev_priv) < 10 && !IS_GEMINILAKE(dev_priv)) {
+		plane_ctl |= skl_plane_ctl_alpha(plane_state);
+		plane_ctl |= PLANE_CTL_PLANE_GAMMA_DISABLE;
+
+		if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
+			plane_ctl |= PLANE_CTL_YUV_TO_RGB_CSC_FORMAT_BT709;
+
+		if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+			plane_ctl |= PLANE_CTL_YUV_RANGE_CORRECTION_DISABLE;
+	}
+
+	plane_ctl |= skl_plane_ctl_format(fb->format->format);
+	plane_ctl |= skl_plane_ctl_tiling(fb->modifier);
+	plane_ctl |= skl_plane_ctl_rotate(rotation & DRM_MODE_ROTATE_MASK);
+
+	if (INTEL_GEN(dev_priv) >= 10)
+		plane_ctl |= cnl_plane_ctl_flip(rotation &
+						DRM_MODE_REFLECT_MASK);
+
+	if (key->flags & I915_SET_COLORKEY_DESTINATION)
+		plane_ctl |= PLANE_CTL_KEY_ENABLE_DESTINATION;
+	else if (key->flags & I915_SET_COLORKEY_SOURCE)
+		plane_ctl |= PLANE_CTL_KEY_ENABLE_SOURCE;
+
+	return plane_ctl;
+}
+
+u32 glk_plane_color_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	u32 plane_color_ctl = 0;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		return plane_color_ctl;
+
+	if (crtc_state->gamma_enable)
+		plane_color_ctl |= PLANE_COLOR_PIPE_GAMMA_ENABLE;
+
+	if (crtc_state->csc_enable)
+		plane_color_ctl |= PLANE_COLOR_PIPE_CSC_ENABLE;
+
+	return plane_color_ctl;
+}
+
+u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	u32 plane_color_ctl = 0;
+
+	plane_color_ctl |= PLANE_COLOR_PLANE_GAMMA_DISABLE;
+	plane_color_ctl |= glk_plane_color_ctl_alpha(plane_state);
+
+	if (fb->format->is_yuv && !icl_is_hdr_plane(dev_priv, plane->id)) {
+		if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
+			plane_color_ctl |= PLANE_COLOR_CSC_MODE_YUV709_TO_RGB709;
+		else
+			plane_color_ctl |= PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709;
+
+		if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+			plane_color_ctl |= PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE;
+	} else if (fb->format->is_yuv) {
+		plane_color_ctl |= PLANE_COLOR_INPUT_CSC_ENABLE;
+	}
+
+	return plane_color_ctl;
+}
+
+static int
+__intel_display_resume(struct drm_device *dev,
+		       struct drm_atomic_state *state,
+		       struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_crtc_state *crtc_state;
+	struct drm_crtc *crtc;
+	int i, ret;
+
+	intel_modeset_setup_hw_state(dev, ctx);
+	i915_redisable_vga(to_i915(dev));
+
+	if (!state)
+		return 0;
+
+	/*
+	 * We've duplicated the state, pointers to the old state are invalid.
+	 *
+	 * Don't attempt to use the old state until we commit the duplicated state.
+	 */
+	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
+		/*
+		 * Force recalculation even if we restore
+		 * current state. With fast modeset this may not result
+		 * in a modeset when the state is compatible.
+		 */
+		crtc_state->mode_changed = true;
+	}
+
+	/* ignore any reset values/BIOS leftovers in the WM registers */
+	if (!HAS_GMCH(to_i915(dev)))
+		to_intel_atomic_state(state)->skip_intermediate_wm = true;
+
+	ret = drm_atomic_helper_commit_duplicated_state(state, ctx);
+
+	WARN_ON(ret == -EDEADLK);
+	return ret;
+}
+
+static bool gpu_reset_clobbers_display(struct drm_i915_private *dev_priv)
+{
+	return (INTEL_INFO(dev_priv)->gpu_reset_clobbers_display &&
+		intel_has_gpu_reset(dev_priv));
+}
+
+void intel_prepare_reset(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx *ctx = &dev_priv->reset_ctx;
+	struct drm_atomic_state *state;
+	int ret;
+
+	/* reset doesn't touch the display */
+	if (!i915_modparams.force_reset_modeset_test &&
+	    !gpu_reset_clobbers_display(dev_priv))
+		return;
+
+	/* We have a modeset vs reset deadlock, defensively unbreak it. */
+	set_bit(I915_RESET_MODESET, &dev_priv->gpu_error.flags);
+	wake_up_all(&dev_priv->gpu_error.wait_queue);
+
+	if (atomic_read(&dev_priv->gpu_error.pending_fb_pin)) {
+		DRM_DEBUG_KMS("Modeset potentially stuck, unbreaking through wedging\n");
+		i915_gem_set_wedged(dev_priv);
+	}
+
+	/*
+	 * Need mode_config.mutex so that we don't
+	 * trample ongoing ->detect() and whatnot.
+	 */
+	mutex_lock(&dev->mode_config.mutex);
+	drm_modeset_acquire_init(ctx, 0);
+	while (1) {
+		ret = drm_modeset_lock_all_ctx(dev, ctx);
+		if (ret != -EDEADLK)
+			break;
+
+		drm_modeset_backoff(ctx);
+	}
+	/*
+	 * Disabling the crtcs gracefully seems nicer. Also the
+	 * g33 docs say we should at least disable all the planes.
+	 */
+	state = drm_atomic_helper_duplicate_state(dev, ctx);
+	if (IS_ERR(state)) {
+		ret = PTR_ERR(state);
+		DRM_ERROR("Duplicating state failed with %i\n", ret);
+		return;
+	}
+
+	ret = drm_atomic_helper_disable_all(dev, ctx);
+	if (ret) {
+		DRM_ERROR("Suspending crtc's failed with %i\n", ret);
+		drm_atomic_state_put(state);
+		return;
+	}
+
+	dev_priv->modeset_restore_state = state;
+	state->acquire_ctx = ctx;
+}
+
+void intel_finish_reset(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx *ctx = &dev_priv->reset_ctx;
+	struct drm_atomic_state *state;
+	int ret;
+
+	/* reset doesn't touch the display */
+	if (!test_bit(I915_RESET_MODESET, &dev_priv->gpu_error.flags))
+		return;
+
+	state = fetch_and_zero(&dev_priv->modeset_restore_state);
+	if (!state)
+		goto unlock;
+
+	/* reset doesn't touch the display */
+	if (!gpu_reset_clobbers_display(dev_priv)) {
+		/* for testing only restore the display */
+		ret = __intel_display_resume(dev, state, ctx);
+		if (ret)
+			DRM_ERROR("Restoring old state failed with %i\n", ret);
+	} else {
+		/*
+		 * The display has been reset as well,
+		 * so need a full re-initialization.
+		 */
+		intel_pps_unlock_regs_wa(dev_priv);
+		intel_modeset_init_hw(dev);
+		intel_init_clock_gating(dev_priv);
+
+		spin_lock_irq(&dev_priv->irq_lock);
+		if (dev_priv->display.hpd_irq_setup)
+			dev_priv->display.hpd_irq_setup(dev_priv);
+		spin_unlock_irq(&dev_priv->irq_lock);
+
+		ret = __intel_display_resume(dev, state, ctx);
+		if (ret)
+			DRM_ERROR("Restoring old state failed with %i\n", ret);
+
+		intel_hpd_init(dev_priv);
+	}
+
+	drm_atomic_state_put(state);
+unlock:
+	drm_modeset_drop_locks(ctx);
+	drm_modeset_acquire_fini(ctx);
+	mutex_unlock(&dev->mode_config.mutex);
+
+	clear_bit(I915_RESET_MODESET, &dev_priv->gpu_error.flags);
+}
+
+static void icl_set_pipe_chicken(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 tmp;
+
+	tmp = I915_READ(PIPE_CHICKEN(pipe));
+
+	/*
+	 * Display WA #1153: icl
+	 * enable hardware to bypass the alpha math
+	 * and rounding for per-pixel values 00 and 0xff
+	 */
+	tmp |= PER_PIXEL_ALPHA_BYPASS_EN;
+	/*
+	 * Display WA # 1605353570: icl
+	 * Set the pixel rounding bit to 1 for allowing
+	 * passthrough of Frame buffer pixels unmodified
+	 * across pipe
+	 */
+	tmp |= PIXEL_ROUNDING_TRUNC_FB_PASSTHRU;
+	I915_WRITE(PIPE_CHICKEN(pipe), tmp);
+}
+
+static void intel_update_pipe_config(const struct intel_crtc_state *old_crtc_state,
+				     const struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	/* drm_atomic_helper_update_legacy_modeset_state might not be called. */
+	crtc->base.mode = new_crtc_state->base.mode;
+
+	/*
+	 * Update pipe size and adjust fitter if needed: the reason for this is
+	 * that in compute_mode_changes we check the native mode (not the pfit
+	 * mode) to see if we can flip rather than do a full mode set. In the
+	 * fastboot case, we'll flip, but if we don't update the pipesrc and
+	 * pfit state, we'll end up with a big fb scanned out into the wrong
+	 * sized surface.
+	 */
+
+	I915_WRITE(PIPESRC(crtc->pipe),
+		   ((new_crtc_state->pipe_src_w - 1) << 16) |
+		   (new_crtc_state->pipe_src_h - 1));
+
+	/* on skylake this is done by detaching scalers */
+	if (INTEL_GEN(dev_priv) >= 9) {
+		skl_detach_scalers(new_crtc_state);
+
+		if (new_crtc_state->pch_pfit.enabled)
+			skylake_pfit_enable(new_crtc_state);
+	} else if (HAS_PCH_SPLIT(dev_priv)) {
+		if (new_crtc_state->pch_pfit.enabled)
+			ironlake_pfit_enable(new_crtc_state);
+		else if (old_crtc_state->pch_pfit.enabled)
+			ironlake_pfit_disable(old_crtc_state);
+	}
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		icl_set_pipe_chicken(crtc);
+}
+
+static void intel_fdi_normal_train(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* enable normal train */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	if (IS_IVYBRIDGE(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_NONE_IVB;
+		temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
+	}
+	I915_WRITE(reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_NORMAL_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_NONE;
+	}
+	I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
+
+	/* wait one idle pattern time */
+	POSTING_READ(reg);
+	udelay(1000);
+
+	/* IVB wants error correction enabled */
+	if (IS_IVYBRIDGE(dev_priv))
+		I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
+			   FDI_FE_ERRC_ENABLE);
+}
+
+/* The FDI link training functions for ILK/Ibexpeak. */
+static void ironlake_fdi_link_train(struct intel_crtc *crtc,
+				    const struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp, tries;
+
+	/* FDI needs bits from pipe first */
+	assert_pipe_enabled(dev_priv, pipe);
+
+	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
+	   for train result */
+	reg = FDI_RX_IMR(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_RX_SYMBOL_LOCK;
+	temp &= ~FDI_RX_BIT_LOCK;
+	I915_WRITE(reg, temp);
+	I915_READ(reg);
+	udelay(150);
+
+	/* enable CPU FDI TX and PCH FDI RX */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_DP_PORT_WIDTH_MASK;
+	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	I915_WRITE(reg, temp | FDI_TX_ENABLE);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	I915_WRITE(reg, temp | FDI_RX_ENABLE);
+
+	POSTING_READ(reg);
+	udelay(150);
+
+	/* Ironlake workaround, enable clock pointer after FDI enable*/
+	I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
+	I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
+		   FDI_RX_PHASE_SYNC_POINTER_EN);
+
+	reg = FDI_RX_IIR(pipe);
+	for (tries = 0; tries < 5; tries++) {
+		temp = I915_READ(reg);
+		DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
+
+		if ((temp & FDI_RX_BIT_LOCK)) {
+			DRM_DEBUG_KMS("FDI train 1 done.\n");
+			I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
+			break;
+		}
+	}
+	if (tries == 5)
+		DRM_ERROR("FDI train 1 fail!\n");
+
+	/* Train 2 */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_2;
+	I915_WRITE(reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_2;
+	I915_WRITE(reg, temp);
+
+	POSTING_READ(reg);
+	udelay(150);
+
+	reg = FDI_RX_IIR(pipe);
+	for (tries = 0; tries < 5; tries++) {
+		temp = I915_READ(reg);
+		DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
+
+		if (temp & FDI_RX_SYMBOL_LOCK) {
+			I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
+			DRM_DEBUG_KMS("FDI train 2 done.\n");
+			break;
+		}
+	}
+	if (tries == 5)
+		DRM_ERROR("FDI train 2 fail!\n");
+
+	DRM_DEBUG_KMS("FDI train done\n");
+
+}
+
+static const int snb_b_fdi_train_param[] = {
+	FDI_LINK_TRAIN_400MV_0DB_SNB_B,
+	FDI_LINK_TRAIN_400MV_6DB_SNB_B,
+	FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
+	FDI_LINK_TRAIN_800MV_0DB_SNB_B,
+};
+
+/* The FDI link training functions for SNB/Cougarpoint. */
+static void gen6_fdi_link_train(struct intel_crtc *crtc,
+				const struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp, i, retry;
+
+	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
+	   for train result */
+	reg = FDI_RX_IMR(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_RX_SYMBOL_LOCK;
+	temp &= ~FDI_RX_BIT_LOCK;
+	I915_WRITE(reg, temp);
+
+	POSTING_READ(reg);
+	udelay(150);
+
+	/* enable CPU FDI TX and PCH FDI RX */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_DP_PORT_WIDTH_MASK;
+	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+	/* SNB-B */
+	temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
+	I915_WRITE(reg, temp | FDI_TX_ENABLE);
+
+	I915_WRITE(FDI_RX_MISC(pipe),
+		   FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_PATTERN_1;
+	}
+	I915_WRITE(reg, temp | FDI_RX_ENABLE);
+
+	POSTING_READ(reg);
+	udelay(150);
+
+	for (i = 0; i < 4; i++) {
+		reg = FDI_TX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		temp |= snb_b_fdi_train_param[i];
+		I915_WRITE(reg, temp);
+
+		POSTING_READ(reg);
+		udelay(500);
+
+		for (retry = 0; retry < 5; retry++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = I915_READ(reg);
+			DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
+			if (temp & FDI_RX_BIT_LOCK) {
+				I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
+				DRM_DEBUG_KMS("FDI train 1 done.\n");
+				break;
+			}
+			udelay(50);
+		}
+		if (retry < 5)
+			break;
+	}
+	if (i == 4)
+		DRM_ERROR("FDI train 1 fail!\n");
+
+	/* Train 2 */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_2;
+	if (IS_GEN(dev_priv, 6)) {
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		/* SNB-B */
+		temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
+	}
+	I915_WRITE(reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_PATTERN_2;
+	}
+	I915_WRITE(reg, temp);
+
+	POSTING_READ(reg);
+	udelay(150);
+
+	for (i = 0; i < 4; i++) {
+		reg = FDI_TX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		temp |= snb_b_fdi_train_param[i];
+		I915_WRITE(reg, temp);
+
+		POSTING_READ(reg);
+		udelay(500);
+
+		for (retry = 0; retry < 5; retry++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = I915_READ(reg);
+			DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
+			if (temp & FDI_RX_SYMBOL_LOCK) {
+				I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
+				DRM_DEBUG_KMS("FDI train 2 done.\n");
+				break;
+			}
+			udelay(50);
+		}
+		if (retry < 5)
+			break;
+	}
+	if (i == 4)
+		DRM_ERROR("FDI train 2 fail!\n");
+
+	DRM_DEBUG_KMS("FDI train done.\n");
+}
+
+/* Manual link training for Ivy Bridge A0 parts */
+static void ivb_manual_fdi_link_train(struct intel_crtc *crtc,
+				      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = crtc->pipe;
+	i915_reg_t reg;
+	u32 temp, i, j;
+
+	/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
+	   for train result */
+	reg = FDI_RX_IMR(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_RX_SYMBOL_LOCK;
+	temp &= ~FDI_RX_BIT_LOCK;
+	I915_WRITE(reg, temp);
+
+	POSTING_READ(reg);
+	udelay(150);
+
+	DRM_DEBUG_KMS("FDI_RX_IIR before link train 0x%x\n",
+		      I915_READ(FDI_RX_IIR(pipe)));
+
+	/* Try each vswing and preemphasis setting twice before moving on */
+	for (j = 0; j < ARRAY_SIZE(snb_b_fdi_train_param) * 2; j++) {
+		/* disable first in case we need to retry */
+		reg = FDI_TX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
+		temp &= ~FDI_TX_ENABLE;
+		I915_WRITE(reg, temp);
+
+		reg = FDI_RX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~FDI_LINK_TRAIN_AUTO;
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp &= ~FDI_RX_ENABLE;
+		I915_WRITE(reg, temp);
+
+		/* enable CPU FDI TX and PCH FDI RX */
+		reg = FDI_TX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~FDI_DP_PORT_WIDTH_MASK;
+		temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+		temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
+		temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
+		temp |= snb_b_fdi_train_param[j/2];
+		temp |= FDI_COMPOSITE_SYNC;
+		I915_WRITE(reg, temp | FDI_TX_ENABLE);
+
+		I915_WRITE(FDI_RX_MISC(pipe),
+			   FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
+
+		reg = FDI_RX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
+		temp |= FDI_COMPOSITE_SYNC;
+		I915_WRITE(reg, temp | FDI_RX_ENABLE);
+
+		POSTING_READ(reg);
+		udelay(1); /* should be 0.5us */
+
+		for (i = 0; i < 4; i++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = I915_READ(reg);
+			DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
+
+			if (temp & FDI_RX_BIT_LOCK ||
+			    (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
+				I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
+				DRM_DEBUG_KMS("FDI train 1 done, level %i.\n",
+					      i);
+				break;
+			}
+			udelay(1); /* should be 0.5us */
+		}
+		if (i == 4) {
+			DRM_DEBUG_KMS("FDI train 1 fail on vswing %d\n", j / 2);
+			continue;
+		}
+
+		/* Train 2 */
+		reg = FDI_TX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~FDI_LINK_TRAIN_NONE_IVB;
+		temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
+		I915_WRITE(reg, temp);
+
+		reg = FDI_RX_CTL(pipe);
+		temp = I915_READ(reg);
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
+		I915_WRITE(reg, temp);
+
+		POSTING_READ(reg);
+		udelay(2); /* should be 1.5us */
+
+		for (i = 0; i < 4; i++) {
+			reg = FDI_RX_IIR(pipe);
+			temp = I915_READ(reg);
+			DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
+
+			if (temp & FDI_RX_SYMBOL_LOCK ||
+			    (I915_READ(reg) & FDI_RX_SYMBOL_LOCK)) {
+				I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
+				DRM_DEBUG_KMS("FDI train 2 done, level %i.\n",
+					      i);
+				goto train_done;
+			}
+			udelay(2); /* should be 1.5us */
+		}
+		if (i == 4)
+			DRM_DEBUG_KMS("FDI train 2 fail on vswing %d\n", j / 2);
+	}
+
+train_done:
+	DRM_DEBUG_KMS("FDI train done.\n");
+}
+
+static void ironlake_fdi_pll_enable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
+	int pipe = intel_crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~(FDI_DP_PORT_WIDTH_MASK | (0x7 << 16));
+	temp |= FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
+	temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
+	I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
+
+	POSTING_READ(reg);
+	udelay(200);
+
+	/* Switch from Rawclk to PCDclk */
+	temp = I915_READ(reg);
+	I915_WRITE(reg, temp | FDI_PCDCLK);
+
+	POSTING_READ(reg);
+	udelay(200);
+
+	/* Enable CPU FDI TX PLL, always on for Ironlake */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	if ((temp & FDI_TX_PLL_ENABLE) == 0) {
+		I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
+
+		POSTING_READ(reg);
+		udelay(100);
+	}
+}
+
+static void ironlake_fdi_pll_disable(struct intel_crtc *intel_crtc)
+{
+	struct drm_device *dev = intel_crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = intel_crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* Switch from PCDclk to Rawclk */
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	I915_WRITE(reg, temp & ~FDI_PCDCLK);
+
+	/* Disable CPU FDI TX PLL */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
+
+	POSTING_READ(reg);
+	udelay(100);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
+
+	/* Wait for the clocks to turn off. */
+	POSTING_READ(reg);
+	udelay(100);
+}
+
+static void ironlake_fdi_disable(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	i915_reg_t reg;
+	u32 temp;
+
+	/* disable CPU FDI tx and PCH FDI rx */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
+	POSTING_READ(reg);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~(0x7 << 16);
+	temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
+	I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
+
+	POSTING_READ(reg);
+	udelay(100);
+
+	/* Ironlake workaround, disable clock pointer after downing FDI */
+	if (HAS_PCH_IBX(dev_priv))
+		I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
+
+	/* still set train pattern 1 */
+	reg = FDI_TX_CTL(pipe);
+	temp = I915_READ(reg);
+	temp &= ~FDI_LINK_TRAIN_NONE;
+	temp |= FDI_LINK_TRAIN_PATTERN_1;
+	I915_WRITE(reg, temp);
+
+	reg = FDI_RX_CTL(pipe);
+	temp = I915_READ(reg);
+	if (HAS_PCH_CPT(dev_priv)) {
+		temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
+		temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
+	} else {
+		temp &= ~FDI_LINK_TRAIN_NONE;
+		temp |= FDI_LINK_TRAIN_PATTERN_1;
+	}
+	/* BPC in FDI rx is consistent with that in PIPECONF */
+	temp &= ~(0x07 << 16);
+	temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
+	I915_WRITE(reg, temp);
+
+	POSTING_READ(reg);
+	udelay(100);
+}
+
+bool intel_has_pending_fb_unpin(struct drm_i915_private *dev_priv)
+{
+	struct drm_crtc *crtc;
+	bool cleanup_done;
+
+	drm_for_each_crtc(crtc, &dev_priv->drm) {
+		struct drm_crtc_commit *commit;
+		spin_lock(&crtc->commit_lock);
+		commit = list_first_entry_or_null(&crtc->commit_list,
+						  struct drm_crtc_commit, commit_entry);
+		cleanup_done = commit ?
+			try_wait_for_completion(&commit->cleanup_done) : true;
+		spin_unlock(&crtc->commit_lock);
+
+		if (cleanup_done)
+			continue;
+
+		drm_crtc_wait_one_vblank(crtc);
+
+		return true;
+	}
+
+	return false;
+}
+
+void lpt_disable_iclkip(struct drm_i915_private *dev_priv)
+{
+	u32 temp;
+
+	I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_GATE);
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
+	temp |= SBI_SSCCTL_DISABLE;
+	intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
+
+	mutex_unlock(&dev_priv->sb_lock);
+}
+
+/* Program iCLKIP clock to the desired frequency */
+static void lpt_program_iclkip(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	int clock = crtc_state->base.adjusted_mode.crtc_clock;
+	u32 divsel, phaseinc, auxdiv, phasedir = 0;
+	u32 temp;
+
+	lpt_disable_iclkip(dev_priv);
+
+	/* The iCLK virtual clock root frequency is in MHz,
+	 * but the adjusted_mode->crtc_clock in in KHz. To get the
+	 * divisors, it is necessary to divide one by another, so we
+	 * convert the virtual clock precision to KHz here for higher
+	 * precision.
+	 */
+	for (auxdiv = 0; auxdiv < 2; auxdiv++) {
+		u32 iclk_virtual_root_freq = 172800 * 1000;
+		u32 iclk_pi_range = 64;
+		u32 desired_divisor;
+
+		desired_divisor = DIV_ROUND_CLOSEST(iclk_virtual_root_freq,
+						    clock << auxdiv);
+		divsel = (desired_divisor / iclk_pi_range) - 2;
+		phaseinc = desired_divisor % iclk_pi_range;
+
+		/*
+		 * Near 20MHz is a corner case which is
+		 * out of range for the 7-bit divisor
+		 */
+		if (divsel <= 0x7f)
+			break;
+	}
+
+	/* This should not happen with any sane values */
+	WARN_ON(SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
+		~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
+	WARN_ON(SBI_SSCDIVINTPHASE_DIR(phasedir) &
+		~SBI_SSCDIVINTPHASE_INCVAL_MASK);
+
+	DRM_DEBUG_KMS("iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
+			clock,
+			auxdiv,
+			divsel,
+			phasedir,
+			phaseinc);
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	/* Program SSCDIVINTPHASE6 */
+	temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
+	temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
+	temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
+	temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
+	temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
+	temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
+	temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
+	intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
+
+	/* Program SSCAUXDIV */
+	temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
+	temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
+	temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
+	intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
+
+	/* Enable modulator and associated divider */
+	temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
+	temp &= ~SBI_SSCCTL_DISABLE;
+	intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
+
+	mutex_unlock(&dev_priv->sb_lock);
+
+	/* Wait for initialization time */
+	udelay(24);
+
+	I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
+}
+
+int lpt_get_iclkip(struct drm_i915_private *dev_priv)
+{
+	u32 divsel, phaseinc, auxdiv;
+	u32 iclk_virtual_root_freq = 172800 * 1000;
+	u32 iclk_pi_range = 64;
+	u32 desired_divisor;
+	u32 temp;
+
+	if ((I915_READ(PIXCLK_GATE) & PIXCLK_GATE_UNGATE) == 0)
+		return 0;
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
+	if (temp & SBI_SSCCTL_DISABLE) {
+		mutex_unlock(&dev_priv->sb_lock);
+		return 0;
+	}
+
+	temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
+	divsel = (temp & SBI_SSCDIVINTPHASE_DIVSEL_MASK) >>
+		SBI_SSCDIVINTPHASE_DIVSEL_SHIFT;
+	phaseinc = (temp & SBI_SSCDIVINTPHASE_INCVAL_MASK) >>
+		SBI_SSCDIVINTPHASE_INCVAL_SHIFT;
+
+	temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
+	auxdiv = (temp & SBI_SSCAUXDIV_FINALDIV2SEL_MASK) >>
+		SBI_SSCAUXDIV_FINALDIV2SEL_SHIFT;
+
+	mutex_unlock(&dev_priv->sb_lock);
+
+	desired_divisor = (divsel + 2) * iclk_pi_range + phaseinc;
+
+	return DIV_ROUND_CLOSEST(iclk_virtual_root_freq,
+				 desired_divisor << auxdiv);
+}
+
+static void ironlake_pch_transcoder_set_timings(const struct intel_crtc_state *crtc_state,
+						enum pipe pch_transcoder)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	I915_WRITE(PCH_TRANS_HTOTAL(pch_transcoder),
+		   I915_READ(HTOTAL(cpu_transcoder)));
+	I915_WRITE(PCH_TRANS_HBLANK(pch_transcoder),
+		   I915_READ(HBLANK(cpu_transcoder)));
+	I915_WRITE(PCH_TRANS_HSYNC(pch_transcoder),
+		   I915_READ(HSYNC(cpu_transcoder)));
+
+	I915_WRITE(PCH_TRANS_VTOTAL(pch_transcoder),
+		   I915_READ(VTOTAL(cpu_transcoder)));
+	I915_WRITE(PCH_TRANS_VBLANK(pch_transcoder),
+		   I915_READ(VBLANK(cpu_transcoder)));
+	I915_WRITE(PCH_TRANS_VSYNC(pch_transcoder),
+		   I915_READ(VSYNC(cpu_transcoder)));
+	I915_WRITE(PCH_TRANS_VSYNCSHIFT(pch_transcoder),
+		   I915_READ(VSYNCSHIFT(cpu_transcoder)));
+}
+
+static void cpt_set_fdi_bc_bifurcation(struct drm_i915_private *dev_priv, bool enable)
+{
+	u32 temp;
+
+	temp = I915_READ(SOUTH_CHICKEN1);
+	if (!!(temp & FDI_BC_BIFURCATION_SELECT) == enable)
+		return;
+
+	WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
+	WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
+
+	temp &= ~FDI_BC_BIFURCATION_SELECT;
+	if (enable)
+		temp |= FDI_BC_BIFURCATION_SELECT;
+
+	DRM_DEBUG_KMS("%sabling fdi C rx\n", enable ? "en" : "dis");
+	I915_WRITE(SOUTH_CHICKEN1, temp);
+	POSTING_READ(SOUTH_CHICKEN1);
+}
+
+static void ivybridge_update_fdi_bc_bifurcation(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	switch (crtc->pipe) {
+	case PIPE_A:
+		break;
+	case PIPE_B:
+		if (crtc_state->fdi_lanes > 2)
+			cpt_set_fdi_bc_bifurcation(dev_priv, false);
+		else
+			cpt_set_fdi_bc_bifurcation(dev_priv, true);
+
+		break;
+	case PIPE_C:
+		cpt_set_fdi_bc_bifurcation(dev_priv, true);
+
+		break;
+	default:
+		BUG();
+	}
+}
+
+/*
+ * Finds the encoder associated with the given CRTC. This can only be
+ * used when we know that the CRTC isn't feeding multiple encoders!
+ */
+static struct intel_encoder *
+intel_get_crtc_new_encoder(const struct intel_atomic_state *state,
+			   const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const struct drm_connector_state *connector_state;
+	const struct drm_connector *connector;
+	struct intel_encoder *encoder = NULL;
+	int num_encoders = 0;
+	int i;
+
+	for_each_new_connector_in_state(&state->base, connector, connector_state, i) {
+		if (connector_state->crtc != &crtc->base)
+			continue;
+
+		encoder = to_intel_encoder(connector_state->best_encoder);
+		num_encoders++;
+	}
+
+	WARN(num_encoders != 1, "%d encoders for pipe %c\n",
+	     num_encoders, pipe_name(crtc->pipe));
+
+	return encoder;
+}
+
+/*
+ * Enable PCH resources required for PCH ports:
+ *   - PCH PLLs
+ *   - FDI training & RX/TX
+ *   - update transcoder timings
+ *   - DP transcoding bits
+ *   - transcoder
+ */
+static void ironlake_pch_enable(const struct intel_atomic_state *state,
+				const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = crtc->pipe;
+	u32 temp;
+
+	assert_pch_transcoder_disabled(dev_priv, pipe);
+
+	if (IS_IVYBRIDGE(dev_priv))
+		ivybridge_update_fdi_bc_bifurcation(crtc_state);
+
+	/* Write the TU size bits before fdi link training, so that error
+	 * detection works. */
+	I915_WRITE(FDI_RX_TUSIZE1(pipe),
+		   I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
+
+	/* For PCH output, training FDI link */
+	dev_priv->display.fdi_link_train(crtc, crtc_state);
+
+	/* We need to program the right clock selection before writing the pixel
+	 * mutliplier into the DPLL. */
+	if (HAS_PCH_CPT(dev_priv)) {
+		u32 sel;
+
+		temp = I915_READ(PCH_DPLL_SEL);
+		temp |= TRANS_DPLL_ENABLE(pipe);
+		sel = TRANS_DPLLB_SEL(pipe);
+		if (crtc_state->shared_dpll ==
+		    intel_get_shared_dpll_by_id(dev_priv, DPLL_ID_PCH_PLL_B))
+			temp |= sel;
+		else
+			temp &= ~sel;
+		I915_WRITE(PCH_DPLL_SEL, temp);
+	}
+
+	/* XXX: pch pll's can be enabled any time before we enable the PCH
+	 * transcoder, and we actually should do this to not upset any PCH
+	 * transcoder that already use the clock when we share it.
+	 *
+	 * Note that enable_shared_dpll tries to do the right thing, but
+	 * get_shared_dpll unconditionally resets the pll - we need that to have
+	 * the right LVDS enable sequence. */
+	intel_enable_shared_dpll(crtc_state);
+
+	/* set transcoder timing, panel must allow it */
+	assert_panel_unlocked(dev_priv, pipe);
+	ironlake_pch_transcoder_set_timings(crtc_state, pipe);
+
+	intel_fdi_normal_train(crtc);
+
+	/* For PCH DP, enable TRANS_DP_CTL */
+	if (HAS_PCH_CPT(dev_priv) &&
+	    intel_crtc_has_dp_encoder(crtc_state)) {
+		const struct drm_display_mode *adjusted_mode =
+			&crtc_state->base.adjusted_mode;
+		u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) >> 5;
+		i915_reg_t reg = TRANS_DP_CTL(pipe);
+		enum port port;
+
+		temp = I915_READ(reg);
+		temp &= ~(TRANS_DP_PORT_SEL_MASK |
+			  TRANS_DP_SYNC_MASK |
+			  TRANS_DP_BPC_MASK);
+		temp |= TRANS_DP_OUTPUT_ENABLE;
+		temp |= bpc << 9; /* same format but at 11:9 */
+
+		if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+			temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
+		if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+			temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
+
+		port = intel_get_crtc_new_encoder(state, crtc_state)->port;
+		WARN_ON(port < PORT_B || port > PORT_D);
+		temp |= TRANS_DP_PORT_SEL(port);
+
+		I915_WRITE(reg, temp);
+	}
+
+	ironlake_enable_pch_transcoder(crtc_state);
+}
+
+static void lpt_pch_enable(const struct intel_atomic_state *state,
+			   const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	assert_pch_transcoder_disabled(dev_priv, PIPE_A);
+
+	lpt_program_iclkip(crtc_state);
+
+	/* Set transcoder timing. */
+	ironlake_pch_transcoder_set_timings(crtc_state, PIPE_A);
+
+	lpt_enable_pch_transcoder(dev_priv, cpu_transcoder);
+}
+
+static void cpt_verify_modeset(struct drm_device *dev, int pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	i915_reg_t dslreg = PIPEDSL(pipe);
+	u32 temp;
+
+	temp = I915_READ(dslreg);
+	udelay(500);
+	if (wait_for(I915_READ(dslreg) != temp, 5)) {
+		if (wait_for(I915_READ(dslreg) != temp, 5))
+			DRM_ERROR("mode set failed: pipe %c stuck\n", pipe_name(pipe));
+	}
+}
+
+/*
+ * The hardware phase 0.0 refers to the center of the pixel.
+ * We want to start from the top/left edge which is phase
+ * -0.5. That matches how the hardware calculates the scaling
+ * factors (from top-left of the first pixel to bottom-right
+ * of the last pixel, as opposed to the pixel centers).
+ *
+ * For 4:2:0 subsampled chroma planes we obviously have to
+ * adjust that so that the chroma sample position lands in
+ * the right spot.
+ *
+ * Note that for packed YCbCr 4:2:2 formats there is no way to
+ * control chroma siting. The hardware simply replicates the
+ * chroma samples for both of the luma samples, and thus we don't
+ * actually get the expected MPEG2 chroma siting convention :(
+ * The same behaviour is observed on pre-SKL platforms as well.
+ *
+ * Theory behind the formula (note that we ignore sub-pixel
+ * source coordinates):
+ * s = source sample position
+ * d = destination sample position
+ *
+ * Downscaling 4:1:
+ * -0.5
+ * | 0.0
+ * | |     1.5 (initial phase)
+ * | |     |
+ * v v     v
+ * | s | s | s | s |
+ * |       d       |
+ *
+ * Upscaling 1:4:
+ * -0.5
+ * | -0.375 (initial phase)
+ * | |     0.0
+ * | |     |
+ * v v     v
+ * |       s       |
+ * | d | d | d | d |
+ */
+u16 skl_scaler_calc_phase(int sub, int scale, bool chroma_cosited)
+{
+	int phase = -0x8000;
+	u16 trip = 0;
+
+	if (chroma_cosited)
+		phase += (sub - 1) * 0x8000 / sub;
+
+	phase += scale / (2 * sub);
+
+	/*
+	 * Hardware initial phase limited to [-0.5:1.5].
+	 * Since the max hardware scale factor is 3.0, we
+	 * should never actually excdeed 1.0 here.
+	 */
+	WARN_ON(phase < -0x8000 || phase > 0x18000);
+
+	if (phase < 0)
+		phase = 0x10000 + phase;
+	else
+		trip = PS_PHASE_TRIP;
+
+	return ((phase >> 2) & PS_PHASE_MASK) | trip;
+}
+
+#define SKL_MIN_SRC_W 8
+#define SKL_MAX_SRC_W 4096
+#define SKL_MIN_SRC_H 8
+#define SKL_MAX_SRC_H 4096
+#define SKL_MIN_DST_W 8
+#define SKL_MAX_DST_W 4096
+#define SKL_MIN_DST_H 8
+#define SKL_MAX_DST_H 4096
+#define ICL_MAX_SRC_W 5120
+#define ICL_MAX_SRC_H 4096
+#define ICL_MAX_DST_W 5120
+#define ICL_MAX_DST_H 4096
+#define SKL_MIN_YUV_420_SRC_W 16
+#define SKL_MIN_YUV_420_SRC_H 16
+
+static int
+skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
+		  unsigned int scaler_user, int *scaler_id,
+		  int src_w, int src_h, int dst_w, int dst_h,
+		  const struct drm_format_info *format, bool need_scaler)
+{
+	struct intel_crtc_scaler_state *scaler_state =
+		&crtc_state->scaler_state;
+	struct intel_crtc *intel_crtc =
+		to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+
+	/*
+	 * Src coordinates are already rotated by 270 degrees for
+	 * the 90/270 degree plane rotation cases (to match the
+	 * GTT mapping), hence no need to account for rotation here.
+	 */
+	if (src_w != dst_w || src_h != dst_h)
+		need_scaler = true;
+
+	/*
+	 * Scaling/fitting not supported in IF-ID mode in GEN9+
+	 * TODO: Interlace fetch mode doesn't support YUV420 planar formats.
+	 * Once NV12 is enabled, handle it here while allocating scaler
+	 * for NV12.
+	 */
+	if (INTEL_GEN(dev_priv) >= 9 && crtc_state->base.enable &&
+	    need_scaler && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+		DRM_DEBUG_KMS("Pipe/Plane scaling not supported with IF-ID mode\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * if plane is being disabled or scaler is no more required or force detach
+	 *  - free scaler binded to this plane/crtc
+	 *  - in order to do this, update crtc->scaler_usage
+	 *
+	 * Here scaler state in crtc_state is set free so that
+	 * scaler can be assigned to other user. Actual register
+	 * update to free the scaler is done in plane/panel-fit programming.
+	 * For this purpose crtc/plane_state->scaler_id isn't reset here.
+	 */
+	if (force_detach || !need_scaler) {
+		if (*scaler_id >= 0) {
+			scaler_state->scaler_users &= ~(1 << scaler_user);
+			scaler_state->scalers[*scaler_id].in_use = 0;
+
+			DRM_DEBUG_KMS("scaler_user index %u.%u: "
+				"Staged freeing scaler id %d scaler_users = 0x%x\n",
+				intel_crtc->pipe, scaler_user, *scaler_id,
+				scaler_state->scaler_users);
+			*scaler_id = -1;
+		}
+		return 0;
+	}
+
+	if (format && is_planar_yuv_format(format->format) &&
+	    (src_h < SKL_MIN_YUV_420_SRC_H || src_w < SKL_MIN_YUV_420_SRC_W)) {
+		DRM_DEBUG_KMS("Planar YUV: src dimensions not met\n");
+		return -EINVAL;
+	}
+
+	/* range checks */
+	if (src_w < SKL_MIN_SRC_W || src_h < SKL_MIN_SRC_H ||
+	    dst_w < SKL_MIN_DST_W || dst_h < SKL_MIN_DST_H ||
+	    (INTEL_GEN(dev_priv) >= 11 &&
+	     (src_w > ICL_MAX_SRC_W || src_h > ICL_MAX_SRC_H ||
+	      dst_w > ICL_MAX_DST_W || dst_h > ICL_MAX_DST_H)) ||
+	    (INTEL_GEN(dev_priv) < 11 &&
+	     (src_w > SKL_MAX_SRC_W || src_h > SKL_MAX_SRC_H ||
+	      dst_w > SKL_MAX_DST_W || dst_h > SKL_MAX_DST_H)))	{
+		DRM_DEBUG_KMS("scaler_user index %u.%u: src %ux%u dst %ux%u "
+			"size is out of scaler range\n",
+			intel_crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h);
+		return -EINVAL;
+	}
+
+	/* mark this plane as a scaler user in crtc_state */
+	scaler_state->scaler_users |= (1 << scaler_user);
+	DRM_DEBUG_KMS("scaler_user index %u.%u: "
+		"staged scaling request for %ux%u->%ux%u scaler_users = 0x%x\n",
+		intel_crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h,
+		scaler_state->scaler_users);
+
+	return 0;
+}
+
+/**
+ * skl_update_scaler_crtc - Stages update to scaler state for a given crtc.
+ *
+ * @state: crtc's scaler state
+ *
+ * Return
+ *     0 - scaler_usage updated successfully
+ *    error - requested scaling cannot be supported or other error condition
+ */
+int skl_update_scaler_crtc(struct intel_crtc_state *state)
+{
+	const struct drm_display_mode *adjusted_mode = &state->base.adjusted_mode;
+	bool need_scaler = false;
+
+	if (state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+		need_scaler = true;
+
+	return skl_update_scaler(state, !state->base.active, SKL_CRTC_INDEX,
+				 &state->scaler_state.scaler_id,
+				 state->pipe_src_w, state->pipe_src_h,
+				 adjusted_mode->crtc_hdisplay,
+				 adjusted_mode->crtc_vdisplay, NULL, need_scaler);
+}
+
+/**
+ * skl_update_scaler_plane - Stages update to scaler state for a given plane.
+ * @crtc_state: crtc's scaler state
+ * @plane_state: atomic plane state to update
+ *
+ * Return
+ *     0 - scaler_usage updated successfully
+ *    error - requested scaling cannot be supported or other error condition
+ */
+static int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
+				   struct intel_plane_state *plane_state)
+{
+	struct intel_plane *intel_plane =
+		to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
+	struct drm_framebuffer *fb = plane_state->base.fb;
+	int ret;
+	bool force_detach = !fb || !plane_state->base.visible;
+	bool need_scaler = false;
+
+	/* Pre-gen11 and SDR planes always need a scaler for planar formats. */
+	if (!icl_is_hdr_plane(dev_priv, intel_plane->id) &&
+	    fb && is_planar_yuv_format(fb->format->format))
+		need_scaler = true;
+
+	ret = skl_update_scaler(crtc_state, force_detach,
+				drm_plane_index(&intel_plane->base),
+				&plane_state->scaler_id,
+				drm_rect_width(&plane_state->base.src) >> 16,
+				drm_rect_height(&plane_state->base.src) >> 16,
+				drm_rect_width(&plane_state->base.dst),
+				drm_rect_height(&plane_state->base.dst),
+				fb ? fb->format : NULL, need_scaler);
+
+	if (ret || plane_state->scaler_id < 0)
+		return ret;
+
+	/* check colorkey */
+	if (plane_state->ckey.flags) {
+		DRM_DEBUG_KMS("[PLANE:%d:%s] scaling with color key not allowed",
+			      intel_plane->base.base.id,
+			      intel_plane->base.name);
+		return -EINVAL;
+	}
+
+	/* Check src format */
+	switch (fb->format->format) {
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_ABGR8888:
+	case DRM_FORMAT_ARGB8888:
+	case DRM_FORMAT_XRGB2101010:
+	case DRM_FORMAT_XBGR2101010:
+	case DRM_FORMAT_XBGR16161616F:
+	case DRM_FORMAT_ABGR16161616F:
+	case DRM_FORMAT_XRGB16161616F:
+	case DRM_FORMAT_ARGB16161616F:
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YVYU:
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_VYUY:
+	case DRM_FORMAT_NV12:
+	case DRM_FORMAT_P010:
+	case DRM_FORMAT_P012:
+	case DRM_FORMAT_P016:
+	case DRM_FORMAT_Y210:
+	case DRM_FORMAT_Y212:
+	case DRM_FORMAT_Y216:
+	case DRM_FORMAT_XVYU2101010:
+	case DRM_FORMAT_XVYU12_16161616:
+	case DRM_FORMAT_XVYU16161616:
+		break;
+	default:
+		DRM_DEBUG_KMS("[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
+			      intel_plane->base.base.id, intel_plane->base.name,
+			      fb->base.id, fb->format->format);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void skylake_scaler_disable(struct intel_crtc *crtc)
+{
+	int i;
+
+	for (i = 0; i < crtc->num_scalers; i++)
+		skl_detach_scaler(crtc, i);
+}
+
+static void skylake_pfit_enable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	const struct intel_crtc_scaler_state *scaler_state =
+		&crtc_state->scaler_state;
+
+	if (crtc_state->pch_pfit.enabled) {
+		u16 uv_rgb_hphase, uv_rgb_vphase;
+		int pfit_w, pfit_h, hscale, vscale;
+		int id;
+
+		if (WARN_ON(crtc_state->scaler_state.scaler_id < 0))
+			return;
+
+		pfit_w = (crtc_state->pch_pfit.size >> 16) & 0xFFFF;
+		pfit_h = crtc_state->pch_pfit.size & 0xFFFF;
+
+		hscale = (crtc_state->pipe_src_w << 16) / pfit_w;
+		vscale = (crtc_state->pipe_src_h << 16) / pfit_h;
+
+		uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
+		uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
+
+		id = scaler_state->scaler_id;
+		I915_WRITE(SKL_PS_CTRL(pipe, id), PS_SCALER_EN |
+			PS_FILTER_MEDIUM | scaler_state->scalers[id].mode);
+		I915_WRITE_FW(SKL_PS_VPHASE(pipe, id),
+			      PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_vphase));
+		I915_WRITE_FW(SKL_PS_HPHASE(pipe, id),
+			      PS_Y_PHASE(0) | PS_UV_RGB_PHASE(uv_rgb_hphase));
+		I915_WRITE(SKL_PS_WIN_POS(pipe, id), crtc_state->pch_pfit.pos);
+		I915_WRITE(SKL_PS_WIN_SZ(pipe, id), crtc_state->pch_pfit.size);
+	}
+}
+
+static void ironlake_pfit_enable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	int pipe = crtc->pipe;
+
+	if (crtc_state->pch_pfit.enabled) {
+		/* Force use of hard-coded filter coefficients
+		 * as some pre-programmed values are broken,
+		 * e.g. x201.
+		 */
+		if (IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv))
+			I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
+						 PF_PIPE_SEL_IVB(pipe));
+		else
+			I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3);
+		I915_WRITE(PF_WIN_POS(pipe), crtc_state->pch_pfit.pos);
+		I915_WRITE(PF_WIN_SZ(pipe), crtc_state->pch_pfit.size);
+	}
+}
+
+void hsw_enable_ips(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	if (!crtc_state->ips_enabled)
+		return;
+
+	/*
+	 * We can only enable IPS after we enable a plane and wait for a vblank
+	 * This function is called from post_plane_update, which is run after
+	 * a vblank wait.
+	 */
+	WARN_ON(!(crtc_state->active_planes & ~BIT(PLANE_CURSOR)));
+
+	if (IS_BROADWELL(dev_priv)) {
+		WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL,
+						IPS_ENABLE | IPS_PCODE_CONTROL));
+		/* Quoting Art Runyan: "its not safe to expect any particular
+		 * value in IPS_CTL bit 31 after enabling IPS through the
+		 * mailbox." Moreover, the mailbox may return a bogus state,
+		 * so we need to just enable it and continue on.
+		 */
+	} else {
+		I915_WRITE(IPS_CTL, IPS_ENABLE);
+		/* The bit only becomes 1 in the next vblank, so this wait here
+		 * is essentially intel_wait_for_vblank. If we don't have this
+		 * and don't wait for vblanks until the end of crtc_enable, then
+		 * the HW state readout code will complain that the expected
+		 * IPS_CTL value is not the one we read. */
+		if (intel_wait_for_register(&dev_priv->uncore,
+					    IPS_CTL, IPS_ENABLE, IPS_ENABLE,
+					    50))
+			DRM_ERROR("Timed out waiting for IPS enable\n");
+	}
+}
+
+void hsw_disable_ips(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	if (!crtc_state->ips_enabled)
+		return;
+
+	if (IS_BROADWELL(dev_priv)) {
+		WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0));
+		/*
+		 * Wait for PCODE to finish disabling IPS. The BSpec specified
+		 * 42ms timeout value leads to occasional timeouts so use 100ms
+		 * instead.
+		 */
+		if (intel_wait_for_register(&dev_priv->uncore,
+					    IPS_CTL, IPS_ENABLE, 0,
+					    100))
+			DRM_ERROR("Timed out waiting for IPS disable\n");
+	} else {
+		I915_WRITE(IPS_CTL, 0);
+		POSTING_READ(IPS_CTL);
+	}
+
+	/* We need to wait for a vblank before we can disable the plane. */
+	intel_wait_for_vblank(dev_priv, crtc->pipe);
+}
+
+static void intel_crtc_dpms_overlay_disable(struct intel_crtc *intel_crtc)
+{
+	if (intel_crtc->overlay) {
+		struct drm_device *dev = intel_crtc->base.dev;
+
+		mutex_lock(&dev->struct_mutex);
+		(void) intel_overlay_switch_off(intel_crtc->overlay);
+		mutex_unlock(&dev->struct_mutex);
+	}
+
+	/* Let userspace switch the overlay on again. In most cases userspace
+	 * has to recompute where to put it anyway.
+	 */
+}
+
+/**
+ * intel_post_enable_primary - Perform operations after enabling primary plane
+ * @crtc: the CRTC whose primary plane was just enabled
+ * @new_crtc_state: the enabling state
+ *
+ * Performs potentially sleeping operations that must be done after the primary
+ * plane is enabled, such as updating FBC and IPS.  Note that this may be
+ * called due to an explicit primary plane update, or due to an implicit
+ * re-enable that is caused when a sprite plane is updated to no longer
+ * completely hide the primary plane.
+ */
+static void
+intel_post_enable_primary(struct drm_crtc *crtc,
+			  const struct intel_crtc_state *new_crtc_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+
+	/*
+	 * Gen2 reports pipe underruns whenever all planes are disabled.
+	 * So don't enable underrun reporting before at least some planes
+	 * are enabled.
+	 * FIXME: Need to fix the logic to work when we turn off all planes
+	 * but leave the pipe running.
+	 */
+	if (IS_GEN(dev_priv, 2))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
+
+	/* Underruns don't always raise interrupts, so check manually. */
+	intel_check_cpu_fifo_underruns(dev_priv);
+	intel_check_pch_fifo_underruns(dev_priv);
+}
+
+/* FIXME get rid of this and use pre_plane_update */
+static void
+intel_pre_disable_primary_noatomic(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+
+	/*
+	 * Gen2 reports pipe underruns whenever all planes are disabled.
+	 * So disable underrun reporting before all the planes get disabled.
+	 */
+	if (IS_GEN(dev_priv, 2))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
+
+	hsw_disable_ips(to_intel_crtc_state(crtc->state));
+
+	/*
+	 * Vblank time updates from the shadow to live plane control register
+	 * are blocked if the memory self-refresh mode is active at that
+	 * moment. So to make sure the plane gets truly disabled, disable
+	 * first the self-refresh mode. The self-refresh enable bit in turn
+	 * will be checked/applied by the HW only at the next frame start
+	 * event which is after the vblank start event, so we need to have a
+	 * wait-for-vblank between disabling the plane and the pipe.
+	 */
+	if (HAS_GMCH(dev_priv) &&
+	    intel_set_memory_cxsr(dev_priv, false))
+		intel_wait_for_vblank(dev_priv, pipe);
+}
+
+static bool hsw_pre_update_disable_ips(const struct intel_crtc_state *old_crtc_state,
+				       const struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (!old_crtc_state->ips_enabled)
+		return false;
+
+	if (needs_modeset(&new_crtc_state->base))
+		return true;
+
+	/*
+	 * Workaround : Do not read or write the pipe palette/gamma data while
+	 * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
+	 *
+	 * Disable IPS before we program the LUT.
+	 */
+	if (IS_HASWELL(dev_priv) &&
+	    (new_crtc_state->base.color_mgmt_changed ||
+	     new_crtc_state->update_pipe) &&
+	    new_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT)
+		return true;
+
+	return !new_crtc_state->ips_enabled;
+}
+
+static bool hsw_post_update_enable_ips(const struct intel_crtc_state *old_crtc_state,
+				       const struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (!new_crtc_state->ips_enabled)
+		return false;
+
+	if (needs_modeset(&new_crtc_state->base))
+		return true;
+
+	/*
+	 * Workaround : Do not read or write the pipe palette/gamma data while
+	 * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
+	 *
+	 * Re-enable IPS after the LUT has been programmed.
+	 */
+	if (IS_HASWELL(dev_priv) &&
+	    (new_crtc_state->base.color_mgmt_changed ||
+	     new_crtc_state->update_pipe) &&
+	    new_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT)
+		return true;
+
+	/*
+	 * We can't read out IPS on broadwell, assume the worst and
+	 * forcibly enable IPS on the first fastset.
+	 */
+	if (new_crtc_state->update_pipe &&
+	    old_crtc_state->base.adjusted_mode.private_flags & I915_MODE_FLAG_INHERITED)
+		return true;
+
+	return !old_crtc_state->ips_enabled;
+}
+
+static bool needs_nv12_wa(struct drm_i915_private *dev_priv,
+			  const struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->nv12_planes)
+		return false;
+
+	/* WA Display #0827: Gen9:all */
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
+		return true;
+
+	return false;
+}
+
+static bool needs_scalerclk_wa(struct drm_i915_private *dev_priv,
+			       const struct intel_crtc_state *crtc_state)
+{
+	/* Wa_2006604312:icl */
+	if (crtc_state->scaler_state.scaler_users > 0 && IS_ICELAKE(dev_priv))
+		return true;
+
+	return false;
+}
+
+static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *old_state = old_crtc_state->base.state;
+	struct intel_crtc_state *pipe_config =
+		intel_atomic_get_new_crtc_state(to_intel_atomic_state(old_state),
+						crtc);
+	struct drm_plane *primary = crtc->base.primary;
+	struct drm_plane_state *old_primary_state =
+		drm_atomic_get_old_plane_state(old_state, primary);
+
+	intel_frontbuffer_flip(to_i915(crtc->base.dev), pipe_config->fb_bits);
+
+	if (pipe_config->update_wm_post && pipe_config->base.active)
+		intel_update_watermarks(crtc);
+
+	if (hsw_post_update_enable_ips(old_crtc_state, pipe_config))
+		hsw_enable_ips(pipe_config);
+
+	if (old_primary_state) {
+		struct drm_plane_state *new_primary_state =
+			drm_atomic_get_new_plane_state(old_state, primary);
+
+		intel_fbc_post_update(crtc);
+
+		if (new_primary_state->visible &&
+		    (needs_modeset(&pipe_config->base) ||
+		     !old_primary_state->visible))
+			intel_post_enable_primary(&crtc->base, pipe_config);
+	}
+
+	if (needs_nv12_wa(dev_priv, old_crtc_state) &&
+	    !needs_nv12_wa(dev_priv, pipe_config))
+		skl_wa_827(dev_priv, crtc->pipe, false);
+
+	if (needs_scalerclk_wa(dev_priv, old_crtc_state) &&
+	    !needs_scalerclk_wa(dev_priv, pipe_config))
+		icl_wa_scalerclkgating(dev_priv, crtc->pipe, false);
+}
+
+static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
+				   struct intel_crtc_state *pipe_config)
+{
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *old_state = old_crtc_state->base.state;
+	struct drm_plane *primary = crtc->base.primary;
+	struct drm_plane_state *old_primary_state =
+		drm_atomic_get_old_plane_state(old_state, primary);
+	bool modeset = needs_modeset(&pipe_config->base);
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+
+	if (hsw_pre_update_disable_ips(old_crtc_state, pipe_config))
+		hsw_disable_ips(old_crtc_state);
+
+	if (old_primary_state) {
+		struct intel_plane_state *new_primary_state =
+			intel_atomic_get_new_plane_state(old_intel_state,
+							 to_intel_plane(primary));
+
+		intel_fbc_pre_update(crtc, pipe_config, new_primary_state);
+		/*
+		 * Gen2 reports pipe underruns whenever all planes are disabled.
+		 * So disable underrun reporting before all the planes get disabled.
+		 */
+		if (IS_GEN(dev_priv, 2) && old_primary_state->visible &&
+		    (modeset || !new_primary_state->base.visible))
+			intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, false);
+	}
+
+	/* Display WA 827 */
+	if (!needs_nv12_wa(dev_priv, old_crtc_state) &&
+	    needs_nv12_wa(dev_priv, pipe_config))
+		skl_wa_827(dev_priv, crtc->pipe, true);
+
+	/* Wa_2006604312:icl */
+	if (!needs_scalerclk_wa(dev_priv, old_crtc_state) &&
+	    needs_scalerclk_wa(dev_priv, pipe_config))
+		icl_wa_scalerclkgating(dev_priv, crtc->pipe, true);
+
+	/*
+	 * Vblank time updates from the shadow to live plane control register
+	 * are blocked if the memory self-refresh mode is active at that
+	 * moment. So to make sure the plane gets truly disabled, disable
+	 * first the self-refresh mode. The self-refresh enable bit in turn
+	 * will be checked/applied by the HW only at the next frame start
+	 * event which is after the vblank start event, so we need to have a
+	 * wait-for-vblank between disabling the plane and the pipe.
+	 */
+	if (HAS_GMCH(dev_priv) && old_crtc_state->base.active &&
+	    pipe_config->disable_cxsr && intel_set_memory_cxsr(dev_priv, false))
+		intel_wait_for_vblank(dev_priv, crtc->pipe);
+
+	/*
+	 * IVB workaround: must disable low power watermarks for at least
+	 * one frame before enabling scaling.  LP watermarks can be re-enabled
+	 * when scaling is disabled.
+	 *
+	 * WaCxSRDisabledForSpriteScaling:ivb
+	 */
+	if (pipe_config->disable_lp_wm && ilk_disable_lp_wm(dev) &&
+	    old_crtc_state->base.active)
+		intel_wait_for_vblank(dev_priv, crtc->pipe);
+
+	/*
+	 * If we're doing a modeset, we're done.  No need to do any pre-vblank
+	 * watermark programming here.
+	 */
+	if (needs_modeset(&pipe_config->base))
+		return;
+
+	/*
+	 * For platforms that support atomic watermarks, program the
+	 * 'intermediate' watermarks immediately.  On pre-gen9 platforms, these
+	 * will be the intermediate values that are safe for both pre- and
+	 * post- vblank; when vblank happens, the 'active' values will be set
+	 * to the final 'target' values and we'll do this again to get the
+	 * optimal watermarks.  For gen9+ platforms, the values we program here
+	 * will be the final target values which will get automatically latched
+	 * at vblank time; no further programming will be necessary.
+	 *
+	 * If a platform hasn't been transitioned to atomic watermarks yet,
+	 * we'll continue to update watermarks the old way, if flags tell
+	 * us to.
+	 */
+	if (dev_priv->display.initial_watermarks != NULL)
+		dev_priv->display.initial_watermarks(old_intel_state,
+						     pipe_config);
+	else if (pipe_config->update_wm_pre)
+		intel_update_watermarks(crtc);
+}
+
+static void intel_crtc_disable_planes(struct intel_atomic_state *state,
+				      struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	unsigned int update_mask = new_crtc_state->update_planes;
+	const struct intel_plane_state *old_plane_state;
+	struct intel_plane *plane;
+	unsigned fb_bits = 0;
+	int i;
+
+	intel_crtc_dpms_overlay_disable(crtc);
+
+	for_each_old_intel_plane_in_state(state, plane, old_plane_state, i) {
+		if (crtc->pipe != plane->pipe ||
+		    !(update_mask & BIT(plane->id)))
+			continue;
+
+		intel_disable_plane(plane, new_crtc_state);
+
+		if (old_plane_state->base.visible)
+			fb_bits |= plane->frontbuffer_bit;
+	}
+
+	intel_frontbuffer_flip(dev_priv, fb_bits);
+}
+
+static void intel_encoders_pre_pll_enable(struct drm_crtc *crtc,
+					  struct intel_crtc_state *crtc_state,
+					  struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(conn_state->best_encoder);
+
+		if (conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->pre_pll_enable)
+			encoder->pre_pll_enable(encoder, crtc_state, conn_state);
+	}
+}
+
+static void intel_encoders_pre_enable(struct drm_crtc *crtc,
+				      struct intel_crtc_state *crtc_state,
+				      struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(conn_state->best_encoder);
+
+		if (conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->pre_enable)
+			encoder->pre_enable(encoder, crtc_state, conn_state);
+	}
+}
+
+static void intel_encoders_enable(struct drm_crtc *crtc,
+				  struct intel_crtc_state *crtc_state,
+				  struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(conn_state->best_encoder);
+
+		if (conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->enable)
+			encoder->enable(encoder, crtc_state, conn_state);
+		intel_opregion_notify_encoder(encoder, true);
+	}
+}
+
+static void intel_encoders_disable(struct drm_crtc *crtc,
+				   struct intel_crtc_state *old_crtc_state,
+				   struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *old_conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(old_conn_state->best_encoder);
+
+		if (old_conn_state->crtc != crtc)
+			continue;
+
+		intel_opregion_notify_encoder(encoder, false);
+		if (encoder->disable)
+			encoder->disable(encoder, old_crtc_state, old_conn_state);
+	}
+}
+
+static void intel_encoders_post_disable(struct drm_crtc *crtc,
+					struct intel_crtc_state *old_crtc_state,
+					struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *old_conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(old_conn_state->best_encoder);
+
+		if (old_conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->post_disable)
+			encoder->post_disable(encoder, old_crtc_state, old_conn_state);
+	}
+}
+
+static void intel_encoders_post_pll_disable(struct drm_crtc *crtc,
+					    struct intel_crtc_state *old_crtc_state,
+					    struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *old_conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(old_conn_state->best_encoder);
+
+		if (old_conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->post_pll_disable)
+			encoder->post_pll_disable(encoder, old_crtc_state, old_conn_state);
+	}
+}
+
+static void intel_encoders_update_pipe(struct drm_crtc *crtc,
+				       struct intel_crtc_state *crtc_state,
+				       struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(conn_state->best_encoder);
+
+		if (conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->update_pipe)
+			encoder->update_pipe(encoder, crtc_state, conn_state);
+	}
+}
+
+static void intel_disable_primary_plane(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct intel_plane *plane = to_intel_plane(crtc->base.primary);
+
+	plane->disable_plane(plane, crtc_state);
+}
+
+static void ironlake_crtc_enable(struct intel_crtc_state *pipe_config,
+				 struct drm_atomic_state *old_state)
+{
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+
+	if (WARN_ON(intel_crtc->active))
+		return;
+
+	/*
+	 * Sometimes spurious CPU pipe underruns happen during FDI
+	 * training, at least with VGA+HDMI cloning. Suppress them.
+	 *
+	 * On ILK we get an occasional spurious CPU pipe underruns
+	 * between eDP port A enable and vdd enable. Also PCH port
+	 * enable seems to result in the occasional CPU pipe underrun.
+	 *
+	 * Spurious PCH underruns also occur during PCH enabling.
+	 */
+	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
+	intel_set_pch_fifo_underrun_reporting(dev_priv, pipe, false);
+
+	if (pipe_config->has_pch_encoder)
+		intel_prepare_shared_dpll(pipe_config);
+
+	if (intel_crtc_has_dp_encoder(pipe_config))
+		intel_dp_set_m_n(pipe_config, M1_N1);
+
+	intel_set_pipe_timings(pipe_config);
+	intel_set_pipe_src_size(pipe_config);
+
+	if (pipe_config->has_pch_encoder) {
+		intel_cpu_transcoder_set_m_n(pipe_config,
+					     &pipe_config->fdi_m_n, NULL);
+	}
+
+	ironlake_set_pipeconf(pipe_config);
+
+	intel_crtc->active = true;
+
+	intel_encoders_pre_enable(crtc, pipe_config, old_state);
+
+	if (pipe_config->has_pch_encoder) {
+		/* Note: FDI PLL enabling _must_ be done before we enable the
+		 * cpu pipes, hence this is separate from all the other fdi/pch
+		 * enabling. */
+		ironlake_fdi_pll_enable(pipe_config);
+	} else {
+		assert_fdi_tx_disabled(dev_priv, pipe);
+		assert_fdi_rx_disabled(dev_priv, pipe);
+	}
+
+	ironlake_pfit_enable(pipe_config);
+
+	/*
+	 * On ILK+ LUT must be loaded before the pipe is running but with
+	 * clocks enabled
+	 */
+	intel_color_load_luts(pipe_config);
+	intel_color_commit(pipe_config);
+	/* update DSPCNTR to configure gamma for pipe bottom color */
+	intel_disable_primary_plane(pipe_config);
+
+	if (dev_priv->display.initial_watermarks != NULL)
+		dev_priv->display.initial_watermarks(old_intel_state, pipe_config);
+	intel_enable_pipe(pipe_config);
+
+	if (pipe_config->has_pch_encoder)
+		ironlake_pch_enable(old_intel_state, pipe_config);
+
+	assert_vblank_disabled(crtc);
+	intel_crtc_vblank_on(pipe_config);
+
+	intel_encoders_enable(crtc, pipe_config, old_state);
+
+	if (HAS_PCH_CPT(dev_priv))
+		cpt_verify_modeset(dev, intel_crtc->pipe);
+
+	/*
+	 * Must wait for vblank to avoid spurious PCH FIFO underruns.
+	 * And a second vblank wait is needed at least on ILK with
+	 * some interlaced HDMI modes. Let's do the double wait always
+	 * in case there are more corner cases we don't know about.
+	 */
+	if (pipe_config->has_pch_encoder) {
+		intel_wait_for_vblank(dev_priv, pipe);
+		intel_wait_for_vblank(dev_priv, pipe);
+	}
+	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
+	intel_set_pch_fifo_underrun_reporting(dev_priv, pipe, true);
+}
+
+/* IPS only exists on ULT machines and is tied to pipe A. */
+static bool hsw_crtc_supports_ips(struct intel_crtc *crtc)
+{
+	return HAS_IPS(to_i915(crtc->base.dev)) && crtc->pipe == PIPE_A;
+}
+
+static void glk_pipe_scaler_clock_gating_wa(struct drm_i915_private *dev_priv,
+					    enum pipe pipe, bool apply)
+{
+	u32 val = I915_READ(CLKGATE_DIS_PSL(pipe));
+	u32 mask = DPF_GATING_DIS | DPF_RAM_GATING_DIS | DPFR_GATING_DIS;
+
+	if (apply)
+		val |= mask;
+	else
+		val &= ~mask;
+
+	I915_WRITE(CLKGATE_DIS_PSL(pipe), val);
+}
+
+static void icl_pipe_mbus_enable(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 val;
+
+	val = MBUS_DBOX_A_CREDIT(2);
+	val |= MBUS_DBOX_BW_CREDIT(1);
+	val |= MBUS_DBOX_B_CREDIT(8);
+
+	I915_WRITE(PIPE_MBUS_DBOX_CTL(pipe), val);
+}
+
+static void haswell_crtc_enable(struct intel_crtc_state *pipe_config,
+				struct drm_atomic_state *old_state)
+{
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe, hsw_workaround_pipe;
+	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+	bool psl_clkgate_wa;
+
+	if (WARN_ON(intel_crtc->active))
+		return;
+
+	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
+
+	if (pipe_config->shared_dpll)
+		intel_enable_shared_dpll(pipe_config);
+
+	intel_encoders_pre_enable(crtc, pipe_config, old_state);
+
+	if (intel_crtc_has_dp_encoder(pipe_config))
+		intel_dp_set_m_n(pipe_config, M1_N1);
+
+	if (!transcoder_is_dsi(cpu_transcoder))
+		intel_set_pipe_timings(pipe_config);
+
+	intel_set_pipe_src_size(pipe_config);
+
+	if (cpu_transcoder != TRANSCODER_EDP &&
+	    !transcoder_is_dsi(cpu_transcoder)) {
+		I915_WRITE(PIPE_MULT(cpu_transcoder),
+			   pipe_config->pixel_multiplier - 1);
+	}
+
+	if (pipe_config->has_pch_encoder) {
+		intel_cpu_transcoder_set_m_n(pipe_config,
+					     &pipe_config->fdi_m_n, NULL);
+	}
+
+	if (!transcoder_is_dsi(cpu_transcoder))
+		haswell_set_pipeconf(pipe_config);
+
+	if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
+		bdw_set_pipemisc(pipe_config);
+
+	intel_crtc->active = true;
+
+	/* Display WA #1180: WaDisableScalarClockGating: glk, cnl */
+	psl_clkgate_wa = (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) &&
+			 pipe_config->pch_pfit.enabled;
+	if (psl_clkgate_wa)
+		glk_pipe_scaler_clock_gating_wa(dev_priv, pipe, true);
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		skylake_pfit_enable(pipe_config);
+	else
+		ironlake_pfit_enable(pipe_config);
+
+	/*
+	 * On ILK+ LUT must be loaded before the pipe is running but with
+	 * clocks enabled
+	 */
+	intel_color_load_luts(pipe_config);
+	intel_color_commit(pipe_config);
+	/* update DSPCNTR to configure gamma/csc for pipe bottom color */
+	if (INTEL_GEN(dev_priv) < 9)
+		intel_disable_primary_plane(pipe_config);
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		icl_set_pipe_chicken(intel_crtc);
+
+	intel_ddi_set_pipe_settings(pipe_config);
+	if (!transcoder_is_dsi(cpu_transcoder))
+		intel_ddi_enable_transcoder_func(pipe_config);
+
+	if (dev_priv->display.initial_watermarks != NULL)
+		dev_priv->display.initial_watermarks(old_intel_state, pipe_config);
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		icl_pipe_mbus_enable(intel_crtc);
+
+	/* XXX: Do the pipe assertions at the right place for BXT DSI. */
+	if (!transcoder_is_dsi(cpu_transcoder))
+		intel_enable_pipe(pipe_config);
+
+	if (pipe_config->has_pch_encoder)
+		lpt_pch_enable(old_intel_state, pipe_config);
+
+	if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DP_MST))
+		intel_ddi_set_vc_payload_alloc(pipe_config, true);
+
+	assert_vblank_disabled(crtc);
+	intel_crtc_vblank_on(pipe_config);
+
+	intel_encoders_enable(crtc, pipe_config, old_state);
+
+	if (psl_clkgate_wa) {
+		intel_wait_for_vblank(dev_priv, pipe);
+		glk_pipe_scaler_clock_gating_wa(dev_priv, pipe, false);
+	}
+
+	/* If we change the relative order between pipe/planes enabling, we need
+	 * to change the workaround. */
+	hsw_workaround_pipe = pipe_config->hsw_workaround_pipe;
+	if (IS_HASWELL(dev_priv) && hsw_workaround_pipe != INVALID_PIPE) {
+		intel_wait_for_vblank(dev_priv, hsw_workaround_pipe);
+		intel_wait_for_vblank(dev_priv, hsw_workaround_pipe);
+	}
+}
+
+static void ironlake_pfit_disable(const struct intel_crtc_state *old_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	/* To avoid upsetting the power well on haswell only disable the pfit if
+	 * it's in use. The hw state code will make sure we get this right. */
+	if (old_crtc_state->pch_pfit.enabled) {
+		I915_WRITE(PF_CTL(pipe), 0);
+		I915_WRITE(PF_WIN_POS(pipe), 0);
+		I915_WRITE(PF_WIN_SZ(pipe), 0);
+	}
+}
+
+static void ironlake_crtc_disable(struct intel_crtc_state *old_crtc_state,
+				  struct drm_atomic_state *old_state)
+{
+	struct drm_crtc *crtc = old_crtc_state->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+
+	/*
+	 * Sometimes spurious CPU pipe underruns happen when the
+	 * pipe is already disabled, but FDI RX/TX is still enabled.
+	 * Happens at least with VGA+HDMI cloning. Suppress them.
+	 */
+	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
+	intel_set_pch_fifo_underrun_reporting(dev_priv, pipe, false);
+
+	intel_encoders_disable(crtc, old_crtc_state, old_state);
+
+	drm_crtc_vblank_off(crtc);
+	assert_vblank_disabled(crtc);
+
+	intel_disable_pipe(old_crtc_state);
+
+	ironlake_pfit_disable(old_crtc_state);
+
+	if (old_crtc_state->has_pch_encoder)
+		ironlake_fdi_disable(crtc);
+
+	intel_encoders_post_disable(crtc, old_crtc_state, old_state);
+
+	if (old_crtc_state->has_pch_encoder) {
+		ironlake_disable_pch_transcoder(dev_priv, pipe);
+
+		if (HAS_PCH_CPT(dev_priv)) {
+			i915_reg_t reg;
+			u32 temp;
+
+			/* disable TRANS_DP_CTL */
+			reg = TRANS_DP_CTL(pipe);
+			temp = I915_READ(reg);
+			temp &= ~(TRANS_DP_OUTPUT_ENABLE |
+				  TRANS_DP_PORT_SEL_MASK);
+			temp |= TRANS_DP_PORT_SEL_NONE;
+			I915_WRITE(reg, temp);
+
+			/* disable DPLL_SEL */
+			temp = I915_READ(PCH_DPLL_SEL);
+			temp &= ~(TRANS_DPLL_ENABLE(pipe) | TRANS_DPLLB_SEL(pipe));
+			I915_WRITE(PCH_DPLL_SEL, temp);
+		}
+
+		ironlake_fdi_pll_disable(intel_crtc);
+	}
+
+	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
+	intel_set_pch_fifo_underrun_reporting(dev_priv, pipe, true);
+}
+
+static void haswell_crtc_disable(struct intel_crtc_state *old_crtc_state,
+				 struct drm_atomic_state *old_state)
+{
+	struct drm_crtc *crtc = old_crtc_state->base.crtc;
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
+
+	intel_encoders_disable(crtc, old_crtc_state, old_state);
+
+	drm_crtc_vblank_off(crtc);
+	assert_vblank_disabled(crtc);
+
+	/* XXX: Do the pipe assertions at the right place for BXT DSI. */
+	if (!transcoder_is_dsi(cpu_transcoder))
+		intel_disable_pipe(old_crtc_state);
+
+	if (intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
+		intel_ddi_set_vc_payload_alloc(old_crtc_state, false);
+
+	if (!transcoder_is_dsi(cpu_transcoder))
+		intel_ddi_disable_transcoder_func(old_crtc_state);
+
+	intel_dsc_disable(old_crtc_state);
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		skylake_scaler_disable(intel_crtc);
+	else
+		ironlake_pfit_disable(old_crtc_state);
+
+	intel_encoders_post_disable(crtc, old_crtc_state, old_state);
+
+	intel_encoders_post_pll_disable(crtc, old_crtc_state, old_state);
+}
+
+static void i9xx_pfit_enable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (!crtc_state->gmch_pfit.control)
+		return;
+
+	/*
+	 * The panel fitter should only be adjusted whilst the pipe is disabled,
+	 * according to register description and PRM.
+	 */
+	WARN_ON(I915_READ(PFIT_CONTROL) & PFIT_ENABLE);
+	assert_pipe_disabled(dev_priv, crtc->pipe);
+
+	I915_WRITE(PFIT_PGM_RATIOS, crtc_state->gmch_pfit.pgm_ratios);
+	I915_WRITE(PFIT_CONTROL, crtc_state->gmch_pfit.control);
+
+	/* Border color in case we don't scale up to the full screen. Black by
+	 * default, change to something else for debugging. */
+	I915_WRITE(BCLRPAT(crtc->pipe), 0);
+}
+
+bool intel_port_is_combophy(struct drm_i915_private *dev_priv, enum port port)
+{
+	if (port == PORT_NONE)
+		return false;
+
+	if (IS_ELKHARTLAKE(dev_priv))
+		return port <= PORT_C;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		return port <= PORT_B;
+
+	return false;
+}
+
+bool intel_port_is_tc(struct drm_i915_private *dev_priv, enum port port)
+{
+	if (INTEL_GEN(dev_priv) >= 11 && !IS_ELKHARTLAKE(dev_priv))
+		return port >= PORT_C && port <= PORT_F;
+
+	return false;
+}
+
+enum tc_port intel_port_to_tc(struct drm_i915_private *dev_priv, enum port port)
+{
+	if (!intel_port_is_tc(dev_priv, port))
+		return PORT_TC_NONE;
+
+	return port - PORT_C;
+}
+
+enum intel_display_power_domain intel_port_to_power_domain(enum port port)
+{
+	switch (port) {
+	case PORT_A:
+		return POWER_DOMAIN_PORT_DDI_A_LANES;
+	case PORT_B:
+		return POWER_DOMAIN_PORT_DDI_B_LANES;
+	case PORT_C:
+		return POWER_DOMAIN_PORT_DDI_C_LANES;
+	case PORT_D:
+		return POWER_DOMAIN_PORT_DDI_D_LANES;
+	case PORT_E:
+		return POWER_DOMAIN_PORT_DDI_E_LANES;
+	case PORT_F:
+		return POWER_DOMAIN_PORT_DDI_F_LANES;
+	default:
+		MISSING_CASE(port);
+		return POWER_DOMAIN_PORT_OTHER;
+	}
+}
+
+enum intel_display_power_domain
+intel_aux_power_domain(struct intel_digital_port *dig_port)
+{
+	switch (dig_port->aux_ch) {
+	case AUX_CH_A:
+		return POWER_DOMAIN_AUX_A;
+	case AUX_CH_B:
+		return POWER_DOMAIN_AUX_B;
+	case AUX_CH_C:
+		return POWER_DOMAIN_AUX_C;
+	case AUX_CH_D:
+		return POWER_DOMAIN_AUX_D;
+	case AUX_CH_E:
+		return POWER_DOMAIN_AUX_E;
+	case AUX_CH_F:
+		return POWER_DOMAIN_AUX_F;
+	default:
+		MISSING_CASE(dig_port->aux_ch);
+		return POWER_DOMAIN_AUX_A;
+	}
+}
+
+static u64 get_crtc_power_domains(struct drm_crtc *crtc,
+				  struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_encoder *encoder;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	enum pipe pipe = intel_crtc->pipe;
+	u64 mask;
+	enum transcoder transcoder = crtc_state->cpu_transcoder;
+
+	if (!crtc_state->base.active)
+		return 0;
+
+	mask = BIT_ULL(POWER_DOMAIN_PIPE(pipe));
+	mask |= BIT_ULL(POWER_DOMAIN_TRANSCODER(transcoder));
+	if (crtc_state->pch_pfit.enabled ||
+	    crtc_state->pch_pfit.force_thru)
+		mask |= BIT_ULL(POWER_DOMAIN_PIPE_PANEL_FITTER(pipe));
+
+	drm_for_each_encoder_mask(encoder, dev, crtc_state->base.encoder_mask) {
+		struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
+
+		mask |= BIT_ULL(intel_encoder->power_domain);
+	}
+
+	if (HAS_DDI(dev_priv) && crtc_state->has_audio)
+		mask |= BIT_ULL(POWER_DOMAIN_AUDIO);
+
+	if (crtc_state->shared_dpll)
+		mask |= BIT_ULL(POWER_DOMAIN_DISPLAY_CORE);
+
+	return mask;
+}
+
+static u64
+modeset_get_crtc_power_domains(struct drm_crtc *crtc,
+			       struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	enum intel_display_power_domain domain;
+	u64 domains, new_domains, old_domains;
+
+	old_domains = intel_crtc->enabled_power_domains;
+	intel_crtc->enabled_power_domains = new_domains =
+		get_crtc_power_domains(crtc, crtc_state);
+
+	domains = new_domains & ~old_domains;
+
+	for_each_power_domain(domain, domains)
+		intel_display_power_get(dev_priv, domain);
+
+	return old_domains & ~new_domains;
+}
+
+static void modeset_put_power_domains(struct drm_i915_private *dev_priv,
+				      u64 domains)
+{
+	enum intel_display_power_domain domain;
+
+	for_each_power_domain(domain, domains)
+		intel_display_power_put_unchecked(dev_priv, domain);
+}
+
+static void valleyview_crtc_enable(struct intel_crtc_state *pipe_config,
+				   struct drm_atomic_state *old_state)
+{
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+
+	if (WARN_ON(intel_crtc->active))
+		return;
+
+	if (intel_crtc_has_dp_encoder(pipe_config))
+		intel_dp_set_m_n(pipe_config, M1_N1);
+
+	intel_set_pipe_timings(pipe_config);
+	intel_set_pipe_src_size(pipe_config);
+
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B) {
+		I915_WRITE(CHV_BLEND(pipe), CHV_BLEND_LEGACY);
+		I915_WRITE(CHV_CANVAS(pipe), 0);
+	}
+
+	i9xx_set_pipeconf(pipe_config);
+
+	intel_crtc->active = true;
+
+	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
+
+	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
+
+	if (IS_CHERRYVIEW(dev_priv)) {
+		chv_prepare_pll(intel_crtc, pipe_config);
+		chv_enable_pll(intel_crtc, pipe_config);
+	} else {
+		vlv_prepare_pll(intel_crtc, pipe_config);
+		vlv_enable_pll(intel_crtc, pipe_config);
+	}
+
+	intel_encoders_pre_enable(crtc, pipe_config, old_state);
+
+	i9xx_pfit_enable(pipe_config);
+
+	intel_color_load_luts(pipe_config);
+	intel_color_commit(pipe_config);
+	/* update DSPCNTR to configure gamma for pipe bottom color */
+	intel_disable_primary_plane(pipe_config);
+
+	dev_priv->display.initial_watermarks(old_intel_state,
+					     pipe_config);
+	intel_enable_pipe(pipe_config);
+
+	assert_vblank_disabled(crtc);
+	intel_crtc_vblank_on(pipe_config);
+
+	intel_encoders_enable(crtc, pipe_config, old_state);
+}
+
+static void i9xx_set_pll_dividers(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	I915_WRITE(FP0(crtc->pipe), crtc_state->dpll_hw_state.fp0);
+	I915_WRITE(FP1(crtc->pipe), crtc_state->dpll_hw_state.fp1);
+}
+
+static void i9xx_crtc_enable(struct intel_crtc_state *pipe_config,
+			     struct drm_atomic_state *old_state)
+{
+	struct intel_atomic_state *old_intel_state =
+		to_intel_atomic_state(old_state);
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	enum pipe pipe = intel_crtc->pipe;
+
+	if (WARN_ON(intel_crtc->active))
+		return;
+
+	i9xx_set_pll_dividers(pipe_config);
+
+	if (intel_crtc_has_dp_encoder(pipe_config))
+		intel_dp_set_m_n(pipe_config, M1_N1);
+
+	intel_set_pipe_timings(pipe_config);
+	intel_set_pipe_src_size(pipe_config);
+
+	i9xx_set_pipeconf(pipe_config);
+
+	intel_crtc->active = true;
+
+	if (!IS_GEN(dev_priv, 2))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
+
+	intel_encoders_pre_enable(crtc, pipe_config, old_state);
+
+	i9xx_enable_pll(intel_crtc, pipe_config);
+
+	i9xx_pfit_enable(pipe_config);
+
+	intel_color_load_luts(pipe_config);
+	intel_color_commit(pipe_config);
+	/* update DSPCNTR to configure gamma for pipe bottom color */
+	intel_disable_primary_plane(pipe_config);
+
+	if (dev_priv->display.initial_watermarks != NULL)
+		dev_priv->display.initial_watermarks(old_intel_state,
+						     pipe_config);
+	else
+		intel_update_watermarks(intel_crtc);
+	intel_enable_pipe(pipe_config);
+
+	assert_vblank_disabled(crtc);
+	intel_crtc_vblank_on(pipe_config);
+
+	intel_encoders_enable(crtc, pipe_config, old_state);
+}
+
+static void i9xx_pfit_disable(const struct intel_crtc_state *old_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (!old_crtc_state->gmch_pfit.control)
+		return;
+
+	assert_pipe_disabled(dev_priv, crtc->pipe);
+
+	DRM_DEBUG_KMS("disabling pfit, current: 0x%08x\n",
+		      I915_READ(PFIT_CONTROL));
+	I915_WRITE(PFIT_CONTROL, 0);
+}
+
+static void i9xx_crtc_disable(struct intel_crtc_state *old_crtc_state,
+			      struct drm_atomic_state *old_state)
+{
+	struct drm_crtc *crtc = old_crtc_state->base.crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	int pipe = intel_crtc->pipe;
+
+	/*
+	 * On gen2 planes are double buffered but the pipe isn't, so we must
+	 * wait for planes to fully turn off before disabling the pipe.
+	 */
+	if (IS_GEN(dev_priv, 2))
+		intel_wait_for_vblank(dev_priv, pipe);
+
+	intel_encoders_disable(crtc, old_crtc_state, old_state);
+
+	drm_crtc_vblank_off(crtc);
+	assert_vblank_disabled(crtc);
+
+	intel_disable_pipe(old_crtc_state);
+
+	i9xx_pfit_disable(old_crtc_state);
+
+	intel_encoders_post_disable(crtc, old_crtc_state, old_state);
+
+	if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DSI)) {
+		if (IS_CHERRYVIEW(dev_priv))
+			chv_disable_pll(dev_priv, pipe);
+		else if (IS_VALLEYVIEW(dev_priv))
+			vlv_disable_pll(dev_priv, pipe);
+		else
+			i9xx_disable_pll(old_crtc_state);
+	}
+
+	intel_encoders_post_pll_disable(crtc, old_crtc_state, old_state);
+
+	if (!IS_GEN(dev_priv, 2))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
+
+	if (!dev_priv->display.initial_watermarks)
+		intel_update_watermarks(intel_crtc);
+
+	/* clock the pipe down to 640x480@60 to potentially save power */
+	if (IS_I830(dev_priv))
+		i830_enable_pipe(dev_priv, pipe);
+}
+
+static void intel_crtc_disable_noatomic(struct drm_crtc *crtc,
+					struct drm_modeset_acquire_ctx *ctx)
+{
+	struct intel_encoder *encoder;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_bw_state *bw_state =
+		to_intel_bw_state(dev_priv->bw_obj.state);
+	enum intel_display_power_domain domain;
+	struct intel_plane *plane;
+	u64 domains;
+	struct drm_atomic_state *state;
+	struct intel_crtc_state *crtc_state;
+	int ret;
+
+	if (!intel_crtc->active)
+		return;
+
+	for_each_intel_plane_on_crtc(&dev_priv->drm, intel_crtc, plane) {
+		const struct intel_plane_state *plane_state =
+			to_intel_plane_state(plane->base.state);
+
+		if (plane_state->base.visible)
+			intel_plane_disable_noatomic(intel_crtc, plane);
+	}
+
+	state = drm_atomic_state_alloc(crtc->dev);
+	if (!state) {
+		DRM_DEBUG_KMS("failed to disable [CRTC:%d:%s], out of memory",
+			      crtc->base.id, crtc->name);
+		return;
+	}
+
+	state->acquire_ctx = ctx;
+
+	/* Everything's already locked, -EDEADLK can't happen. */
+	crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
+	ret = drm_atomic_add_affected_connectors(state, crtc);
+
+	WARN_ON(IS_ERR(crtc_state) || ret);
+
+	dev_priv->display.crtc_disable(crtc_state, state);
+
+	drm_atomic_state_put(state);
+
+	DRM_DEBUG_KMS("[CRTC:%d:%s] hw state adjusted, was enabled, now disabled\n",
+		      crtc->base.id, crtc->name);
+
+	WARN_ON(drm_atomic_set_mode_for_crtc(crtc->state, NULL) < 0);
+	crtc->state->active = false;
+	intel_crtc->active = false;
+	crtc->enabled = false;
+	crtc->state->connector_mask = 0;
+	crtc->state->encoder_mask = 0;
+
+	for_each_encoder_on_crtc(crtc->dev, crtc, encoder)
+		encoder->base.crtc = NULL;
+
+	intel_fbc_disable(intel_crtc);
+	intel_update_watermarks(intel_crtc);
+	intel_disable_shared_dpll(to_intel_crtc_state(crtc->state));
+
+	domains = intel_crtc->enabled_power_domains;
+	for_each_power_domain(domain, domains)
+		intel_display_power_put_unchecked(dev_priv, domain);
+	intel_crtc->enabled_power_domains = 0;
+
+	dev_priv->active_crtcs &= ~(1 << intel_crtc->pipe);
+	dev_priv->min_cdclk[intel_crtc->pipe] = 0;
+	dev_priv->min_voltage_level[intel_crtc->pipe] = 0;
+
+	bw_state->data_rate[intel_crtc->pipe] = 0;
+	bw_state->num_active_planes[intel_crtc->pipe] = 0;
+}
+
+/*
+ * turn all crtc's off, but do not adjust state
+ * This has to be paired with a call to intel_modeset_setup_hw_state.
+ */
+int intel_display_suspend(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *state;
+	int ret;
+
+	state = drm_atomic_helper_suspend(dev);
+	ret = PTR_ERR_OR_ZERO(state);
+	if (ret)
+		DRM_ERROR("Suspending crtc's failed with %i\n", ret);
+	else
+		dev_priv->modeset_restore_state = state;
+	return ret;
+}
+
+void intel_encoder_destroy(struct drm_encoder *encoder)
+{
+	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
+
+	drm_encoder_cleanup(encoder);
+	kfree(intel_encoder);
+}
+
+/* Cross check the actual hw state with our own modeset state tracking (and it's
+ * internal consistency). */
+static void intel_connector_verify_state(struct drm_crtc_state *crtc_state,
+					 struct drm_connector_state *conn_state)
+{
+	struct intel_connector *connector = to_intel_connector(conn_state->connector);
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+		      connector->base.base.id,
+		      connector->base.name);
+
+	if (connector->get_hw_state(connector)) {
+		struct intel_encoder *encoder = connector->encoder;
+
+		I915_STATE_WARN(!crtc_state,
+			 "connector enabled without attached crtc\n");
+
+		if (!crtc_state)
+			return;
+
+		I915_STATE_WARN(!crtc_state->active,
+		      "connector is active, but attached crtc isn't\n");
+
+		if (!encoder || encoder->type == INTEL_OUTPUT_DP_MST)
+			return;
+
+		I915_STATE_WARN(conn_state->best_encoder != &encoder->base,
+			"atomic encoder doesn't match attached encoder\n");
+
+		I915_STATE_WARN(conn_state->crtc != encoder->base.crtc,
+			"attached encoder crtc differs from connector crtc\n");
+	} else {
+		I915_STATE_WARN(crtc_state && crtc_state->active,
+			"attached crtc is active, but connector isn't\n");
+		I915_STATE_WARN(!crtc_state && conn_state->best_encoder,
+			"best encoder set without crtc!\n");
+	}
+}
+
+static int pipe_required_fdi_lanes(struct intel_crtc_state *crtc_state)
+{
+	if (crtc_state->base.enable && crtc_state->has_pch_encoder)
+		return crtc_state->fdi_lanes;
+
+	return 0;
+}
+
+static int ironlake_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
+				     struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *state = pipe_config->base.state;
+	struct intel_crtc *other_crtc;
+	struct intel_crtc_state *other_crtc_state;
+
+	DRM_DEBUG_KMS("checking fdi config on pipe %c, lanes %i\n",
+		      pipe_name(pipe), pipe_config->fdi_lanes);
+	if (pipe_config->fdi_lanes > 4) {
+		DRM_DEBUG_KMS("invalid fdi lane config on pipe %c: %i lanes\n",
+			      pipe_name(pipe), pipe_config->fdi_lanes);
+		return -EINVAL;
+	}
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		if (pipe_config->fdi_lanes > 2) {
+			DRM_DEBUG_KMS("only 2 lanes on haswell, required: %i lanes\n",
+				      pipe_config->fdi_lanes);
+			return -EINVAL;
+		} else {
+			return 0;
+		}
+	}
+
+	if (INTEL_INFO(dev_priv)->num_pipes == 2)
+		return 0;
+
+	/* Ivybridge 3 pipe is really complicated */
+	switch (pipe) {
+	case PIPE_A:
+		return 0;
+	case PIPE_B:
+		if (pipe_config->fdi_lanes <= 2)
+			return 0;
+
+		other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_C);
+		other_crtc_state =
+			intel_atomic_get_crtc_state(state, other_crtc);
+		if (IS_ERR(other_crtc_state))
+			return PTR_ERR(other_crtc_state);
+
+		if (pipe_required_fdi_lanes(other_crtc_state) > 0) {
+			DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n",
+				      pipe_name(pipe), pipe_config->fdi_lanes);
+			return -EINVAL;
+		}
+		return 0;
+	case PIPE_C:
+		if (pipe_config->fdi_lanes > 2) {
+			DRM_DEBUG_KMS("only 2 lanes on pipe %c: required %i lanes\n",
+				      pipe_name(pipe), pipe_config->fdi_lanes);
+			return -EINVAL;
+		}
+
+		other_crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_B);
+		other_crtc_state =
+			intel_atomic_get_crtc_state(state, other_crtc);
+		if (IS_ERR(other_crtc_state))
+			return PTR_ERR(other_crtc_state);
+
+		if (pipe_required_fdi_lanes(other_crtc_state) > 2) {
+			DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n");
+			return -EINVAL;
+		}
+		return 0;
+	default:
+		BUG();
+	}
+}
+
+#define RETRY 1
+static int ironlake_fdi_compute_config(struct intel_crtc *intel_crtc,
+				       struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = intel_crtc->base.dev;
+	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
+	int lane, link_bw, fdi_dotclock, ret;
+	bool needs_recompute = false;
+
+retry:
+	/* FDI is a binary signal running at ~2.7GHz, encoding
+	 * each output octet as 10 bits. The actual frequency
+	 * is stored as a divider into a 100MHz clock, and the
+	 * mode pixel clock is stored in units of 1KHz.
+	 * Hence the bw of each lane in terms of the mode signal
+	 * is:
+	 */
+	link_bw = intel_fdi_link_freq(to_i915(dev), pipe_config);
+
+	fdi_dotclock = adjusted_mode->crtc_clock;
+
+	lane = ironlake_get_lanes_required(fdi_dotclock, link_bw,
+					   pipe_config->pipe_bpp);
+
+	pipe_config->fdi_lanes = lane;
+
+	intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
+			       link_bw, &pipe_config->fdi_m_n, false);
+
+	ret = ironlake_check_fdi_lanes(dev, intel_crtc->pipe, pipe_config);
+	if (ret == -EDEADLK)
+		return ret;
+
+	if (ret == -EINVAL && pipe_config->pipe_bpp > 6*3) {
+		pipe_config->pipe_bpp -= 2*3;
+		DRM_DEBUG_KMS("fdi link bw constraint, reducing pipe bpp to %i\n",
+			      pipe_config->pipe_bpp);
+		needs_recompute = true;
+		pipe_config->bw_constrained = true;
+
+		goto retry;
+	}
+
+	if (needs_recompute)
+		return RETRY;
+
+	return ret;
+}
+
+bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	/* IPS only exists on ULT machines and is tied to pipe A. */
+	if (!hsw_crtc_supports_ips(crtc))
+		return false;
+
+	if (!i915_modparams.enable_ips)
+		return false;
+
+	if (crtc_state->pipe_bpp > 24)
+		return false;
+
+	/*
+	 * We compare against max which means we must take
+	 * the increased cdclk requirement into account when
+	 * calculating the new cdclk.
+	 *
+	 * Should measure whether using a lower cdclk w/o IPS
+	 */
+	if (IS_BROADWELL(dev_priv) &&
+	    crtc_state->pixel_rate > dev_priv->max_cdclk_freq * 95 / 100)
+		return false;
+
+	return true;
+}
+
+static bool hsw_compute_ips_config(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(crtc_state->base.crtc->dev);
+	struct intel_atomic_state *intel_state =
+		to_intel_atomic_state(crtc_state->base.state);
+
+	if (!hsw_crtc_state_ips_capable(crtc_state))
+		return false;
+
+	/*
+	 * When IPS gets enabled, the pipe CRC changes. Since IPS gets
+	 * enabled and disabled dynamically based on package C states,
+	 * user space can't make reliable use of the CRCs, so let's just
+	 * completely disable it.
+	 */
+	if (crtc_state->crc_enabled)
+		return false;
+
+	/* IPS should be fine as long as at least one plane is enabled. */
+	if (!(crtc_state->active_planes & ~BIT(PLANE_CURSOR)))
+		return false;
+
+	/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
+	if (IS_BROADWELL(dev_priv) &&
+	    crtc_state->pixel_rate > intel_state->cdclk.logical.cdclk * 95 / 100)
+		return false;
+
+	return true;
+}
+
+static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
+{
+	const struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	/* GDG double wide on either pipe, otherwise pipe A only */
+	return INTEL_GEN(dev_priv) < 4 &&
+		(crtc->pipe == PIPE_A || IS_I915G(dev_priv));
+}
+
+static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *pipe_config)
+{
+	u32 pixel_rate;
+
+	pixel_rate = pipe_config->base.adjusted_mode.crtc_clock;
+
+	/*
+	 * We only use IF-ID interlacing. If we ever use
+	 * PF-ID we'll need to adjust the pixel_rate here.
+	 */
+
+	if (pipe_config->pch_pfit.enabled) {
+		u64 pipe_w, pipe_h, pfit_w, pfit_h;
+		u32 pfit_size = pipe_config->pch_pfit.size;
+
+		pipe_w = pipe_config->pipe_src_w;
+		pipe_h = pipe_config->pipe_src_h;
+
+		pfit_w = (pfit_size >> 16) & 0xFFFF;
+		pfit_h = pfit_size & 0xFFFF;
+		if (pipe_w < pfit_w)
+			pipe_w = pfit_w;
+		if (pipe_h < pfit_h)
+			pipe_h = pfit_h;
+
+		if (WARN_ON(!pfit_w || !pfit_h))
+			return pixel_rate;
+
+		pixel_rate = div_u64(mul_u32_u32(pixel_rate, pipe_w * pipe_h),
+				     pfit_w * pfit_h);
+	}
+
+	return pixel_rate;
+}
+
+static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	if (HAS_GMCH(dev_priv))
+		/* FIXME calculate proper pipe pixel rate for GMCH pfit */
+		crtc_state->pixel_rate =
+			crtc_state->base.adjusted_mode.crtc_clock;
+	else
+		crtc_state->pixel_rate =
+			ilk_pipe_pixel_rate(crtc_state);
+}
+
+static int intel_crtc_compute_config(struct intel_crtc *crtc,
+				     struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
+	int clock_limit = dev_priv->max_dotclk_freq;
+
+	if (INTEL_GEN(dev_priv) < 4) {
+		clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
+
+		/*
+		 * Enable double wide mode when the dot clock
+		 * is > 90% of the (display) core speed.
+		 */
+		if (intel_crtc_supports_double_wide(crtc) &&
+		    adjusted_mode->crtc_clock > clock_limit) {
+			clock_limit = dev_priv->max_dotclk_freq;
+			pipe_config->double_wide = true;
+		}
+	}
+
+	if (adjusted_mode->crtc_clock > clock_limit) {
+		DRM_DEBUG_KMS("requested pixel clock (%d kHz) too high (max: %d kHz, double wide: %s)\n",
+			      adjusted_mode->crtc_clock, clock_limit,
+			      yesno(pipe_config->double_wide));
+		return -EINVAL;
+	}
+
+	if ((pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
+	     pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) &&
+	     pipe_config->base.ctm) {
+		/*
+		 * There is only one pipe CSC unit per pipe, and we need that
+		 * for output conversion from RGB->YCBCR. So if CTM is already
+		 * applied we can't support YCBCR420 output.
+		 */
+		DRM_DEBUG_KMS("YCBCR420 and CTM together are not possible\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Pipe horizontal size must be even in:
+	 * - DVO ganged mode
+	 * - LVDS dual channel mode
+	 * - Double wide pipe
+	 */
+	if (pipe_config->pipe_src_w & 1) {
+		if (pipe_config->double_wide) {
+			DRM_DEBUG_KMS("Odd pipe source width not supported with double wide pipe\n");
+			return -EINVAL;
+		}
+
+		if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_LVDS) &&
+		    intel_is_dual_link_lvds(dev_priv)) {
+			DRM_DEBUG_KMS("Odd pipe source width not supported with dual link LVDS\n");
+			return -EINVAL;
+		}
+	}
+
+	/* Cantiga+ cannot handle modes with a hsync front porch of 0.
+	 * WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.
+	 */
+	if ((INTEL_GEN(dev_priv) > 4 || IS_G4X(dev_priv)) &&
+		adjusted_mode->crtc_hsync_start == adjusted_mode->crtc_hdisplay)
+		return -EINVAL;
+
+	intel_crtc_compute_pixel_rate(pipe_config);
+
+	if (pipe_config->has_pch_encoder)
+		return ironlake_fdi_compute_config(crtc, pipe_config);
+
+	return 0;
+}
+
+static void
+intel_reduce_m_n_ratio(u32 *num, u32 *den)
+{
+	while (*num > DATA_LINK_M_N_MASK ||
+	       *den > DATA_LINK_M_N_MASK) {
+		*num >>= 1;
+		*den >>= 1;
+	}
+}
+
+static void compute_m_n(unsigned int m, unsigned int n,
+			u32 *ret_m, u32 *ret_n,
+			bool constant_n)
+{
+	/*
+	 * Several DP dongles in particular seem to be fussy about
+	 * too large link M/N values. Give N value as 0x8000 that
+	 * should be acceptable by specific devices. 0x8000 is the
+	 * specified fixed N value for asynchronous clock mode,
+	 * which the devices expect also in synchronous clock mode.
+	 */
+	if (constant_n)
+		*ret_n = 0x8000;
+	else
+		*ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX);
+
+	*ret_m = div_u64(mul_u32_u32(m, *ret_n), n);
+	intel_reduce_m_n_ratio(ret_m, ret_n);
+}
+
+void
+intel_link_compute_m_n(u16 bits_per_pixel, int nlanes,
+		       int pixel_clock, int link_clock,
+		       struct intel_link_m_n *m_n,
+		       bool constant_n)
+{
+	m_n->tu = 64;
+
+	compute_m_n(bits_per_pixel * pixel_clock,
+		    link_clock * nlanes * 8,
+		    &m_n->gmch_m, &m_n->gmch_n,
+		    constant_n);
+
+	compute_m_n(pixel_clock, link_clock,
+		    &m_n->link_m, &m_n->link_n,
+		    constant_n);
+}
+
+static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
+{
+	if (i915_modparams.panel_use_ssc >= 0)
+		return i915_modparams.panel_use_ssc != 0;
+	return dev_priv->vbt.lvds_use_ssc
+		&& !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
+}
+
+static u32 pnv_dpll_compute_fp(struct dpll *dpll)
+{
+	return (1 << dpll->n) << 16 | dpll->m2;
+}
+
+static u32 i9xx_dpll_compute_fp(struct dpll *dpll)
+{
+	return dpll->n << 16 | dpll->m1 << 8 | dpll->m2;
+}
+
+static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
+				     struct intel_crtc_state *crtc_state,
+				     struct dpll *reduced_clock)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 fp, fp2 = 0;
+
+	if (IS_PINEVIEW(dev_priv)) {
+		fp = pnv_dpll_compute_fp(&crtc_state->dpll);
+		if (reduced_clock)
+			fp2 = pnv_dpll_compute_fp(reduced_clock);
+	} else {
+		fp = i9xx_dpll_compute_fp(&crtc_state->dpll);
+		if (reduced_clock)
+			fp2 = i9xx_dpll_compute_fp(reduced_clock);
+	}
+
+	crtc_state->dpll_hw_state.fp0 = fp;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+	    reduced_clock) {
+		crtc_state->dpll_hw_state.fp1 = fp2;
+	} else {
+		crtc_state->dpll_hw_state.fp1 = fp;
+	}
+}
+
+static void vlv_pllb_recal_opamp(struct drm_i915_private *dev_priv, enum pipe
+		pipe)
+{
+	u32 reg_val;
+
+	/*
+	 * PLLB opamp always calibrates to max value of 0x3f, force enable it
+	 * and set it to a reasonable value instead.
+	 */
+	reg_val = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW9(1));
+	reg_val &= 0xffffff00;
+	reg_val |= 0x00000030;
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW9(1), reg_val);
+
+	reg_val = vlv_dpio_read(dev_priv, pipe, VLV_REF_DW13);
+	reg_val &= 0x00ffffff;
+	reg_val |= 0x8c000000;
+	vlv_dpio_write(dev_priv, pipe, VLV_REF_DW13, reg_val);
+
+	reg_val = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW9(1));
+	reg_val &= 0xffffff00;
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW9(1), reg_val);
+
+	reg_val = vlv_dpio_read(dev_priv, pipe, VLV_REF_DW13);
+	reg_val &= 0x00ffffff;
+	reg_val |= 0xb0000000;
+	vlv_dpio_write(dev_priv, pipe, VLV_REF_DW13, reg_val);
+}
+
+static void intel_pch_transcoder_set_m_n(const struct intel_crtc_state *crtc_state,
+					 const struct intel_link_m_n *m_n)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	I915_WRITE(PCH_TRANS_DATA_M1(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
+	I915_WRITE(PCH_TRANS_DATA_N1(pipe), m_n->gmch_n);
+	I915_WRITE(PCH_TRANS_LINK_M1(pipe), m_n->link_m);
+	I915_WRITE(PCH_TRANS_LINK_N1(pipe), m_n->link_n);
+}
+
+static bool transcoder_has_m2_n2(struct drm_i915_private *dev_priv,
+				 enum transcoder transcoder)
+{
+	if (IS_HASWELL(dev_priv))
+		return transcoder == TRANSCODER_EDP;
+
+	/*
+	 * Strictly speaking some registers are available before
+	 * gen7, but we only support DRRS on gen7+
+	 */
+	return IS_GEN(dev_priv, 7) || IS_CHERRYVIEW(dev_priv);
+}
+
+static void intel_cpu_transcoder_set_m_n(const struct intel_crtc_state *crtc_state,
+					 const struct intel_link_m_n *m_n,
+					 const struct intel_link_m_n *m2_n2)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	enum transcoder transcoder = crtc_state->cpu_transcoder;
+
+	if (INTEL_GEN(dev_priv) >= 5) {
+		I915_WRITE(PIPE_DATA_M1(transcoder), TU_SIZE(m_n->tu) | m_n->gmch_m);
+		I915_WRITE(PIPE_DATA_N1(transcoder), m_n->gmch_n);
+		I915_WRITE(PIPE_LINK_M1(transcoder), m_n->link_m);
+		I915_WRITE(PIPE_LINK_N1(transcoder), m_n->link_n);
+		/*
+		 *  M2_N2 registers are set only if DRRS is supported
+		 * (to make sure the registers are not unnecessarily accessed).
+		 */
+		if (m2_n2 && crtc_state->has_drrs &&
+		    transcoder_has_m2_n2(dev_priv, transcoder)) {
+			I915_WRITE(PIPE_DATA_M2(transcoder),
+					TU_SIZE(m2_n2->tu) | m2_n2->gmch_m);
+			I915_WRITE(PIPE_DATA_N2(transcoder), m2_n2->gmch_n);
+			I915_WRITE(PIPE_LINK_M2(transcoder), m2_n2->link_m);
+			I915_WRITE(PIPE_LINK_N2(transcoder), m2_n2->link_n);
+		}
+	} else {
+		I915_WRITE(PIPE_DATA_M_G4X(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
+		I915_WRITE(PIPE_DATA_N_G4X(pipe), m_n->gmch_n);
+		I915_WRITE(PIPE_LINK_M_G4X(pipe), m_n->link_m);
+		I915_WRITE(PIPE_LINK_N_G4X(pipe), m_n->link_n);
+	}
+}
+
+void intel_dp_set_m_n(const struct intel_crtc_state *crtc_state, enum link_m_n_set m_n)
+{
+	const struct intel_link_m_n *dp_m_n, *dp_m2_n2 = NULL;
+
+	if (m_n == M1_N1) {
+		dp_m_n = &crtc_state->dp_m_n;
+		dp_m2_n2 = &crtc_state->dp_m2_n2;
+	} else if (m_n == M2_N2) {
+
+		/*
+		 * M2_N2 registers are not supported. Hence m2_n2 divider value
+		 * needs to be programmed into M1_N1.
+		 */
+		dp_m_n = &crtc_state->dp_m2_n2;
+	} else {
+		DRM_ERROR("Unsupported divider value\n");
+		return;
+	}
+
+	if (crtc_state->has_pch_encoder)
+		intel_pch_transcoder_set_m_n(crtc_state, &crtc_state->dp_m_n);
+	else
+		intel_cpu_transcoder_set_m_n(crtc_state, dp_m_n, dp_m2_n2);
+}
+
+static void vlv_compute_dpll(struct intel_crtc *crtc,
+			     struct intel_crtc_state *pipe_config)
+{
+	pipe_config->dpll_hw_state.dpll = DPLL_INTEGRATED_REF_CLK_VLV |
+		DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+	if (crtc->pipe != PIPE_A)
+		pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+	/* DPLL not used with DSI, but still need the rest set up */
+	if (!intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))
+		pipe_config->dpll_hw_state.dpll |= DPLL_VCO_ENABLE |
+			DPLL_EXT_BUFFER_ENABLE_VLV;
+
+	pipe_config->dpll_hw_state.dpll_md =
+		(pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+}
+
+static void chv_compute_dpll(struct intel_crtc *crtc,
+			     struct intel_crtc_state *pipe_config)
+{
+	pipe_config->dpll_hw_state.dpll = DPLL_SSC_REF_CLK_CHV |
+		DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+	if (crtc->pipe != PIPE_A)
+		pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+	/* DPLL not used with DSI, but still need the rest set up */
+	if (!intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))
+		pipe_config->dpll_hw_state.dpll |= DPLL_VCO_ENABLE;
+
+	pipe_config->dpll_hw_state.dpll_md =
+		(pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+}
+
+static void vlv_prepare_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	u32 mdiv;
+	u32 bestn, bestm1, bestm2, bestp1, bestp2;
+	u32 coreclk, reg_val;
+
+	/* Enable Refclk */
+	I915_WRITE(DPLL(pipe),
+		   pipe_config->dpll_hw_state.dpll &
+		   ~(DPLL_VCO_ENABLE | DPLL_EXT_BUFFER_ENABLE_VLV));
+
+	/* No need to actually set up the DPLL with DSI */
+	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
+		return;
+
+	vlv_dpio_get(dev_priv);
+
+	bestn = pipe_config->dpll.n;
+	bestm1 = pipe_config->dpll.m1;
+	bestm2 = pipe_config->dpll.m2;
+	bestp1 = pipe_config->dpll.p1;
+	bestp2 = pipe_config->dpll.p2;
+
+	/* See eDP HDMI DPIO driver vbios notes doc */
+
+	/* PLL B needs special handling */
+	if (pipe == PIPE_B)
+		vlv_pllb_recal_opamp(dev_priv, pipe);
+
+	/* Set up Tx target for periodic Rcomp update */
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW9_BCAST, 0x0100000f);
+
+	/* Disable target IRef on PLL */
+	reg_val = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW8(pipe));
+	reg_val &= 0x00ffffff;
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW8(pipe), reg_val);
+
+	/* Disable fast lock */
+	vlv_dpio_write(dev_priv, pipe, VLV_CMN_DW0, 0x610);
+
+	/* Set idtafcrecal before PLL is enabled */
+	mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
+	mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
+	mdiv |= ((bestn << DPIO_N_SHIFT));
+	mdiv |= (1 << DPIO_K_SHIFT);
+
+	/*
+	 * Post divider depends on pixel clock rate, DAC vs digital (and LVDS,
+	 * but we don't support that).
+	 * Note: don't use the DAC post divider as it seems unstable.
+	 */
+	mdiv |= (DPIO_POST_DIV_HDMIDP << DPIO_POST_DIV_SHIFT);
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW3(pipe), mdiv);
+
+	mdiv |= DPIO_ENABLE_CALIBRATION;
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW3(pipe), mdiv);
+
+	/* Set HBR and RBR LPF coefficients */
+	if (pipe_config->port_clock == 162000 ||
+	    intel_crtc_has_type(pipe_config, INTEL_OUTPUT_ANALOG) ||
+	    intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI))
+		vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW10(pipe),
+				 0x009f0003);
+	else
+		vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW10(pipe),
+				 0x00d0000f);
+
+	if (intel_crtc_has_dp_encoder(pipe_config)) {
+		/* Use SSC source */
+		if (pipe == PIPE_A)
+			vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+					 0x0df40000);
+		else
+			vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+					 0x0df70000);
+	} else { /* HDMI or VGA */
+		/* Use bend source */
+		if (pipe == PIPE_A)
+			vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+					 0x0df70000);
+		else
+			vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW5(pipe),
+					 0x0df40000);
+	}
+
+	coreclk = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW7(pipe));
+	coreclk = (coreclk & 0x0000ff00) | 0x01c00000;
+	if (intel_crtc_has_dp_encoder(pipe_config))
+		coreclk |= 0x01000000;
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW7(pipe), coreclk);
+
+	vlv_dpio_write(dev_priv, pipe, VLV_PLL_DW11(pipe), 0x87871000);
+
+	vlv_dpio_put(dev_priv);
+}
+
+static void chv_prepare_pll(struct intel_crtc *crtc,
+			    const struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	enum dpio_channel port = vlv_pipe_to_channel(pipe);
+	u32 loopfilter, tribuf_calcntr;
+	u32 bestn, bestm1, bestm2, bestp1, bestp2, bestm2_frac;
+	u32 dpio_val;
+	int vco;
+
+	/* Enable Refclk and SSC */
+	I915_WRITE(DPLL(pipe),
+		   pipe_config->dpll_hw_state.dpll & ~DPLL_VCO_ENABLE);
+
+	/* No need to actually set up the DPLL with DSI */
+	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
+		return;
+
+	bestn = pipe_config->dpll.n;
+	bestm2_frac = pipe_config->dpll.m2 & 0x3fffff;
+	bestm1 = pipe_config->dpll.m1;
+	bestm2 = pipe_config->dpll.m2 >> 22;
+	bestp1 = pipe_config->dpll.p1;
+	bestp2 = pipe_config->dpll.p2;
+	vco = pipe_config->dpll.vco;
+	dpio_val = 0;
+	loopfilter = 0;
+
+	vlv_dpio_get(dev_priv);
+
+	/* p1 and p2 divider */
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW13(port),
+			5 << DPIO_CHV_S1_DIV_SHIFT |
+			bestp1 << DPIO_CHV_P1_DIV_SHIFT |
+			bestp2 << DPIO_CHV_P2_DIV_SHIFT |
+			1 << DPIO_CHV_K_DIV_SHIFT);
+
+	/* Feedback post-divider - m2 */
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW0(port), bestm2);
+
+	/* Feedback refclk divider - n and m1 */
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW1(port),
+			DPIO_CHV_M1_DIV_BY_2 |
+			1 << DPIO_CHV_N_DIV_SHIFT);
+
+	/* M2 fraction division */
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW2(port), bestm2_frac);
+
+	/* M2 fraction division enable */
+	dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW3(port));
+	dpio_val &= ~(DPIO_CHV_FEEDFWD_GAIN_MASK | DPIO_CHV_FRAC_DIV_EN);
+	dpio_val |= (2 << DPIO_CHV_FEEDFWD_GAIN_SHIFT);
+	if (bestm2_frac)
+		dpio_val |= DPIO_CHV_FRAC_DIV_EN;
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW3(port), dpio_val);
+
+	/* Program digital lock detect threshold */
+	dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW9(port));
+	dpio_val &= ~(DPIO_CHV_INT_LOCK_THRESHOLD_MASK |
+					DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE);
+	dpio_val |= (0x5 << DPIO_CHV_INT_LOCK_THRESHOLD_SHIFT);
+	if (!bestm2_frac)
+		dpio_val |= DPIO_CHV_INT_LOCK_THRESHOLD_SEL_COARSE;
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW9(port), dpio_val);
+
+	/* Loop filter */
+	if (vco == 5400000) {
+		loopfilter |= (0x3 << DPIO_CHV_PROP_COEFF_SHIFT);
+		loopfilter |= (0x8 << DPIO_CHV_INT_COEFF_SHIFT);
+		loopfilter |= (0x1 << DPIO_CHV_GAIN_CTRL_SHIFT);
+		tribuf_calcntr = 0x9;
+	} else if (vco <= 6200000) {
+		loopfilter |= (0x5 << DPIO_CHV_PROP_COEFF_SHIFT);
+		loopfilter |= (0xB << DPIO_CHV_INT_COEFF_SHIFT);
+		loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
+		tribuf_calcntr = 0x9;
+	} else if (vco <= 6480000) {
+		loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT);
+		loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT);
+		loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
+		tribuf_calcntr = 0x8;
+	} else {
+		/* Not supported. Apply the same limits as in the max case */
+		loopfilter |= (0x4 << DPIO_CHV_PROP_COEFF_SHIFT);
+		loopfilter |= (0x9 << DPIO_CHV_INT_COEFF_SHIFT);
+		loopfilter |= (0x3 << DPIO_CHV_GAIN_CTRL_SHIFT);
+		tribuf_calcntr = 0;
+	}
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW6(port), loopfilter);
+
+	dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW8(port));
+	dpio_val &= ~DPIO_CHV_TDC_TARGET_CNT_MASK;
+	dpio_val |= (tribuf_calcntr << DPIO_CHV_TDC_TARGET_CNT_SHIFT);
+	vlv_dpio_write(dev_priv, pipe, CHV_PLL_DW8(port), dpio_val);
+
+	/* AFC Recal */
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port),
+			vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port)) |
+			DPIO_AFC_RECAL);
+
+	vlv_dpio_put(dev_priv);
+}
+
+/**
+ * vlv_force_pll_on - forcibly enable just the PLL
+ * @dev_priv: i915 private structure
+ * @pipe: pipe PLL to enable
+ * @dpll: PLL configuration
+ *
+ * Enable the PLL for @pipe using the supplied @dpll config. To be used
+ * in cases where we need the PLL enabled even when @pipe is not going to
+ * be enabled.
+ */
+int vlv_force_pll_on(struct drm_i915_private *dev_priv, enum pipe pipe,
+		     const struct dpll *dpll)
+{
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+	struct intel_crtc_state *pipe_config;
+
+	pipe_config = kzalloc(sizeof(*pipe_config), GFP_KERNEL);
+	if (!pipe_config)
+		return -ENOMEM;
+
+	pipe_config->base.crtc = &crtc->base;
+	pipe_config->pixel_multiplier = 1;
+	pipe_config->dpll = *dpll;
+
+	if (IS_CHERRYVIEW(dev_priv)) {
+		chv_compute_dpll(crtc, pipe_config);
+		chv_prepare_pll(crtc, pipe_config);
+		chv_enable_pll(crtc, pipe_config);
+	} else {
+		vlv_compute_dpll(crtc, pipe_config);
+		vlv_prepare_pll(crtc, pipe_config);
+		vlv_enable_pll(crtc, pipe_config);
+	}
+
+	kfree(pipe_config);
+
+	return 0;
+}
+
+/**
+ * vlv_force_pll_off - forcibly disable just the PLL
+ * @dev_priv: i915 private structure
+ * @pipe: pipe PLL to disable
+ *
+ * Disable the PLL for @pipe. To be used in cases where we need
+ * the PLL enabled even when @pipe is not going to be enabled.
+ */
+void vlv_force_pll_off(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	if (IS_CHERRYVIEW(dev_priv))
+		chv_disable_pll(dev_priv, pipe);
+	else
+		vlv_disable_pll(dev_priv, pipe);
+}
+
+static void i9xx_compute_dpll(struct intel_crtc *crtc,
+			      struct intel_crtc_state *crtc_state,
+			      struct dpll *reduced_clock)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 dpll;
+	struct dpll *clock = &crtc_state->dpll;
+
+	i9xx_update_pll_dividers(crtc, crtc_state, reduced_clock);
+
+	dpll = DPLL_VGA_MODE_DIS;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS))
+		dpll |= DPLLB_MODE_LVDS;
+	else
+		dpll |= DPLLB_MODE_DAC_SERIAL;
+
+	if (IS_I945G(dev_priv) || IS_I945GM(dev_priv) ||
+	    IS_G33(dev_priv) || IS_PINEVIEW(dev_priv)) {
+		dpll |= (crtc_state->pixel_multiplier - 1)
+			<< SDVO_MULTIPLIER_SHIFT_HIRES;
+	}
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO) ||
+	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+		dpll |= DPLL_SDVO_HIGH_SPEED;
+
+	if (intel_crtc_has_dp_encoder(crtc_state))
+		dpll |= DPLL_SDVO_HIGH_SPEED;
+
+	/* compute bitmask from p1 value */
+	if (IS_PINEVIEW(dev_priv))
+		dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
+	else {
+		dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+		if (IS_G4X(dev_priv) && reduced_clock)
+			dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
+	}
+	switch (clock->p2) {
+	case 5:
+		dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+		break;
+	case 7:
+		dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+		break;
+	case 10:
+		dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+		break;
+	case 14:
+		dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+		break;
+	}
+	if (INTEL_GEN(dev_priv) >= 4)
+		dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
+
+	if (crtc_state->sdvo_tv_clock)
+		dpll |= PLL_REF_INPUT_TVCLKINBC;
+	else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+		 intel_panel_use_ssc(dev_priv))
+		dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+	else
+		dpll |= PLL_REF_INPUT_DREFCLK;
+
+	dpll |= DPLL_VCO_ENABLE;
+	crtc_state->dpll_hw_state.dpll = dpll;
+
+	if (INTEL_GEN(dev_priv) >= 4) {
+		u32 dpll_md = (crtc_state->pixel_multiplier - 1)
+			<< DPLL_MD_UDI_MULTIPLIER_SHIFT;
+		crtc_state->dpll_hw_state.dpll_md = dpll_md;
+	}
+}
+
+static void i8xx_compute_dpll(struct intel_crtc *crtc,
+			      struct intel_crtc_state *crtc_state,
+			      struct dpll *reduced_clock)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 dpll;
+	struct dpll *clock = &crtc_state->dpll;
+
+	i9xx_update_pll_dividers(crtc, crtc_state, reduced_clock);
+
+	dpll = DPLL_VGA_MODE_DIS;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+	} else {
+		if (clock->p1 == 2)
+			dpll |= PLL_P1_DIVIDE_BY_TWO;
+		else
+			dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+		if (clock->p2 == 4)
+			dpll |= PLL_P2_DIVIDE_BY_4;
+	}
+
+	/*
+	 * Bspec:
+	 * "[Almador Errata}: For the correct operation of the muxed DVO pins
+	 *  (GDEVSELB/I2Cdata, GIRDBY/I2CClk) and (GFRAMEB/DVI_Data,
+	 *  GTRDYB/DVI_Clk): Bit 31 (DPLL VCO Enable) and Bit 30 (2X Clock
+	 *  Enable) must be set to “1” in both the DPLL A Control Register
+	 *  (06014h-06017h) and DPLL B Control Register (06018h-0601Bh)."
+	 *
+	 * For simplicity We simply keep both bits always enabled in
+	 * both DPLLS. The spec says we should disable the DVO 2X clock
+	 * when not needed, but this seems to work fine in practice.
+	 */
+	if (IS_I830(dev_priv) ||
+	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DVO))
+		dpll |= DPLL_DVO_2X_MODE;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+	    intel_panel_use_ssc(dev_priv))
+		dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+	else
+		dpll |= PLL_REF_INPUT_DREFCLK;
+
+	dpll |= DPLL_VCO_ENABLE;
+	crtc_state->dpll_hw_state.dpll = dpll;
+}
+
+static void intel_set_pipe_timings(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode;
+	u32 crtc_vtotal, crtc_vblank_end;
+	int vsyncshift = 0;
+
+	/* We need to be careful not to changed the adjusted mode, for otherwise
+	 * the hw state checker will get angry at the mismatch. */
+	crtc_vtotal = adjusted_mode->crtc_vtotal;
+	crtc_vblank_end = adjusted_mode->crtc_vblank_end;
+
+	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+		/* the chip adds 2 halflines automatically */
+		crtc_vtotal -= 1;
+		crtc_vblank_end -= 1;
+
+		if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO))
+			vsyncshift = (adjusted_mode->crtc_htotal - 1) / 2;
+		else
+			vsyncshift = adjusted_mode->crtc_hsync_start -
+				adjusted_mode->crtc_htotal / 2;
+		if (vsyncshift < 0)
+			vsyncshift += adjusted_mode->crtc_htotal;
+	}
+
+	if (INTEL_GEN(dev_priv) > 3)
+		I915_WRITE(VSYNCSHIFT(cpu_transcoder), vsyncshift);
+
+	I915_WRITE(HTOTAL(cpu_transcoder),
+		   (adjusted_mode->crtc_hdisplay - 1) |
+		   ((adjusted_mode->crtc_htotal - 1) << 16));
+	I915_WRITE(HBLANK(cpu_transcoder),
+		   (adjusted_mode->crtc_hblank_start - 1) |
+		   ((adjusted_mode->crtc_hblank_end - 1) << 16));
+	I915_WRITE(HSYNC(cpu_transcoder),
+		   (adjusted_mode->crtc_hsync_start - 1) |
+		   ((adjusted_mode->crtc_hsync_end - 1) << 16));
+
+	I915_WRITE(VTOTAL(cpu_transcoder),
+		   (adjusted_mode->crtc_vdisplay - 1) |
+		   ((crtc_vtotal - 1) << 16));
+	I915_WRITE(VBLANK(cpu_transcoder),
+		   (adjusted_mode->crtc_vblank_start - 1) |
+		   ((crtc_vblank_end - 1) << 16));
+	I915_WRITE(VSYNC(cpu_transcoder),
+		   (adjusted_mode->crtc_vsync_start - 1) |
+		   ((adjusted_mode->crtc_vsync_end - 1) << 16));
+
+	/* Workaround: when the EDP input selection is B, the VTOTAL_B must be
+	 * programmed with the VTOTAL_EDP value. Same for VTOTAL_C. This is
+	 * documented on the DDI_FUNC_CTL register description, EDP Input Select
+	 * bits. */
+	if (IS_HASWELL(dev_priv) && cpu_transcoder == TRANSCODER_EDP &&
+	    (pipe == PIPE_B || pipe == PIPE_C))
+		I915_WRITE(VTOTAL(pipe), I915_READ(VTOTAL(cpu_transcoder)));
+
+}
+
+static void intel_set_pipe_src_size(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	/* pipesrc controls the size that is scaled from, which should
+	 * always be the user's requested size.
+	 */
+	I915_WRITE(PIPESRC(pipe),
+		   ((crtc_state->pipe_src_w - 1) << 16) |
+		   (crtc_state->pipe_src_h - 1));
+}
+
+static void intel_get_pipe_timings(struct intel_crtc *crtc,
+				   struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
+	u32 tmp;
+
+	tmp = I915_READ(HTOTAL(cpu_transcoder));
+	pipe_config->base.adjusted_mode.crtc_hdisplay = (tmp & 0xffff) + 1;
+	pipe_config->base.adjusted_mode.crtc_htotal = ((tmp >> 16) & 0xffff) + 1;
+
+	if (!transcoder_is_dsi(cpu_transcoder)) {
+		tmp = I915_READ(HBLANK(cpu_transcoder));
+		pipe_config->base.adjusted_mode.crtc_hblank_start =
+							(tmp & 0xffff) + 1;
+		pipe_config->base.adjusted_mode.crtc_hblank_end =
+						((tmp >> 16) & 0xffff) + 1;
+	}
+	tmp = I915_READ(HSYNC(cpu_transcoder));
+	pipe_config->base.adjusted_mode.crtc_hsync_start = (tmp & 0xffff) + 1;
+	pipe_config->base.adjusted_mode.crtc_hsync_end = ((tmp >> 16) & 0xffff) + 1;
+
+	tmp = I915_READ(VTOTAL(cpu_transcoder));
+	pipe_config->base.adjusted_mode.crtc_vdisplay = (tmp & 0xffff) + 1;
+	pipe_config->base.adjusted_mode.crtc_vtotal = ((tmp >> 16) & 0xffff) + 1;
+
+	if (!transcoder_is_dsi(cpu_transcoder)) {
+		tmp = I915_READ(VBLANK(cpu_transcoder));
+		pipe_config->base.adjusted_mode.crtc_vblank_start =
+							(tmp & 0xffff) + 1;
+		pipe_config->base.adjusted_mode.crtc_vblank_end =
+						((tmp >> 16) & 0xffff) + 1;
+	}
+	tmp = I915_READ(VSYNC(cpu_transcoder));
+	pipe_config->base.adjusted_mode.crtc_vsync_start = (tmp & 0xffff) + 1;
+	pipe_config->base.adjusted_mode.crtc_vsync_end = ((tmp >> 16) & 0xffff) + 1;
+
+	if (I915_READ(PIPECONF(cpu_transcoder)) & PIPECONF_INTERLACE_MASK) {
+		pipe_config->base.adjusted_mode.flags |= DRM_MODE_FLAG_INTERLACE;
+		pipe_config->base.adjusted_mode.crtc_vtotal += 1;
+		pipe_config->base.adjusted_mode.crtc_vblank_end += 1;
+	}
+}
+
+static void intel_get_pipe_src_size(struct intel_crtc *crtc,
+				    struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 tmp;
+
+	tmp = I915_READ(PIPESRC(crtc->pipe));
+	pipe_config->pipe_src_h = (tmp & 0xffff) + 1;
+	pipe_config->pipe_src_w = ((tmp >> 16) & 0xffff) + 1;
+
+	pipe_config->base.mode.vdisplay = pipe_config->pipe_src_h;
+	pipe_config->base.mode.hdisplay = pipe_config->pipe_src_w;
+}
+
+void intel_mode_from_pipe_config(struct drm_display_mode *mode,
+				 struct intel_crtc_state *pipe_config)
+{
+	mode->hdisplay = pipe_config->base.adjusted_mode.crtc_hdisplay;
+	mode->htotal = pipe_config->base.adjusted_mode.crtc_htotal;
+	mode->hsync_start = pipe_config->base.adjusted_mode.crtc_hsync_start;
+	mode->hsync_end = pipe_config->base.adjusted_mode.crtc_hsync_end;
+
+	mode->vdisplay = pipe_config->base.adjusted_mode.crtc_vdisplay;
+	mode->vtotal = pipe_config->base.adjusted_mode.crtc_vtotal;
+	mode->vsync_start = pipe_config->base.adjusted_mode.crtc_vsync_start;
+	mode->vsync_end = pipe_config->base.adjusted_mode.crtc_vsync_end;
+
+	mode->flags = pipe_config->base.adjusted_mode.flags;
+	mode->type = DRM_MODE_TYPE_DRIVER;
+
+	mode->clock = pipe_config->base.adjusted_mode.crtc_clock;
+
+	mode->hsync = drm_mode_hsync(mode);
+	mode->vrefresh = drm_mode_vrefresh(mode);
+	drm_mode_set_name(mode);
+}
+
+static void i9xx_set_pipeconf(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 pipeconf;
+
+	pipeconf = 0;
+
+	/* we keep both pipes enabled on 830 */
+	if (IS_I830(dev_priv))
+		pipeconf |= I915_READ(PIPECONF(crtc->pipe)) & PIPECONF_ENABLE;
+
+	if (crtc_state->double_wide)
+		pipeconf |= PIPECONF_DOUBLE_WIDE;
+
+	/* only g4x and later have fancy bpc/dither controls */
+	if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
+	    IS_CHERRYVIEW(dev_priv)) {
+		/* Bspec claims that we can't use dithering for 30bpp pipes. */
+		if (crtc_state->dither && crtc_state->pipe_bpp != 30)
+			pipeconf |= PIPECONF_DITHER_EN |
+				    PIPECONF_DITHER_TYPE_SP;
+
+		switch (crtc_state->pipe_bpp) {
+		case 18:
+			pipeconf |= PIPECONF_6BPC;
+			break;
+		case 24:
+			pipeconf |= PIPECONF_8BPC;
+			break;
+		case 30:
+			pipeconf |= PIPECONF_10BPC;
+			break;
+		default:
+			/* Case prevented by intel_choose_pipe_bpp_dither. */
+			BUG();
+		}
+	}
+
+	if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) {
+		if (INTEL_GEN(dev_priv) < 4 ||
+		    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO))
+			pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
+		else
+			pipeconf |= PIPECONF_INTERLACE_W_SYNC_SHIFT;
+	} else {
+		pipeconf |= PIPECONF_PROGRESSIVE;
+	}
+
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	     crtc_state->limited_color_range)
+		pipeconf |= PIPECONF_COLOR_RANGE_SELECT;
+
+	pipeconf |= PIPECONF_GAMMA_MODE(crtc_state->gamma_mode);
+
+	I915_WRITE(PIPECONF(crtc->pipe), pipeconf);
+	POSTING_READ(PIPECONF(crtc->pipe));
+}
+
+static int i8xx_crtc_compute_clock(struct intel_crtc *crtc,
+				   struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	const struct intel_limit *limit;
+	int refclk = 48000;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		if (intel_panel_use_ssc(dev_priv)) {
+			refclk = dev_priv->vbt.lvds_ssc_freq;
+			DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n", refclk);
+		}
+
+		limit = &intel_limits_i8xx_lvds;
+	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DVO)) {
+		limit = &intel_limits_i8xx_dvo;
+	} else {
+		limit = &intel_limits_i8xx_dac;
+	}
+
+	if (!crtc_state->clock_set &&
+	    !i9xx_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				 refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	i8xx_compute_dpll(crtc, crtc_state, NULL);
+
+	return 0;
+}
+
+static int g4x_crtc_compute_clock(struct intel_crtc *crtc,
+				  struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct intel_limit *limit;
+	int refclk = 96000;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		if (intel_panel_use_ssc(dev_priv)) {
+			refclk = dev_priv->vbt.lvds_ssc_freq;
+			DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n", refclk);
+		}
+
+		if (intel_is_dual_link_lvds(dev_priv))
+			limit = &intel_limits_g4x_dual_channel_lvds;
+		else
+			limit = &intel_limits_g4x_single_channel_lvds;
+	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI) ||
+		   intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
+		limit = &intel_limits_g4x_hdmi;
+	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO)) {
+		limit = &intel_limits_g4x_sdvo;
+	} else {
+		/* The option is for other outputs */
+		limit = &intel_limits_i9xx_sdvo;
+	}
+
+	if (!crtc_state->clock_set &&
+	    !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+	return 0;
+}
+
+static int pnv_crtc_compute_clock(struct intel_crtc *crtc,
+				  struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	const struct intel_limit *limit;
+	int refclk = 96000;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		if (intel_panel_use_ssc(dev_priv)) {
+			refclk = dev_priv->vbt.lvds_ssc_freq;
+			DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n", refclk);
+		}
+
+		limit = &intel_limits_pineview_lvds;
+	} else {
+		limit = &intel_limits_pineview_sdvo;
+	}
+
+	if (!crtc_state->clock_set &&
+	    !pnv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+	return 0;
+}
+
+static int i9xx_crtc_compute_clock(struct intel_crtc *crtc,
+				   struct intel_crtc_state *crtc_state)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	const struct intel_limit *limit;
+	int refclk = 96000;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		if (intel_panel_use_ssc(dev_priv)) {
+			refclk = dev_priv->vbt.lvds_ssc_freq;
+			DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n", refclk);
+		}
+
+		limit = &intel_limits_i9xx_lvds;
+	} else {
+		limit = &intel_limits_i9xx_sdvo;
+	}
+
+	if (!crtc_state->clock_set &&
+	    !i9xx_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				 refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+	return 0;
+}
+
+static int chv_crtc_compute_clock(struct intel_crtc *crtc,
+				  struct intel_crtc_state *crtc_state)
+{
+	int refclk = 100000;
+	const struct intel_limit *limit = &intel_limits_chv;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (!crtc_state->clock_set &&
+	    !chv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	chv_compute_dpll(crtc, crtc_state);
+
+	return 0;
+}
+
+static int vlv_crtc_compute_clock(struct intel_crtc *crtc,
+				  struct intel_crtc_state *crtc_state)
+{
+	int refclk = 100000;
+	const struct intel_limit *limit = &intel_limits_vlv;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (!crtc_state->clock_set &&
+	    !vlv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	vlv_compute_dpll(crtc, crtc_state);
+
+	return 0;
+}
+
+static bool i9xx_has_pfit(struct drm_i915_private *dev_priv)
+{
+	if (IS_I830(dev_priv))
+		return false;
+
+	return INTEL_GEN(dev_priv) >= 4 ||
+		IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv);
+}
+
+static void i9xx_get_pfit_config(struct intel_crtc *crtc,
+				 struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 tmp;
+
+	if (!i9xx_has_pfit(dev_priv))
+		return;
+
+	tmp = I915_READ(PFIT_CONTROL);
+	if (!(tmp & PFIT_ENABLE))
+		return;
+
+	/* Check whether the pfit is attached to our pipe. */
+	if (INTEL_GEN(dev_priv) < 4) {
+		if (crtc->pipe != PIPE_B)
+			return;
+	} else {
+		if ((tmp & PFIT_PIPE_MASK) != (crtc->pipe << PFIT_PIPE_SHIFT))
+			return;
+	}
+
+	pipe_config->gmch_pfit.control = tmp;
+	pipe_config->gmch_pfit.pgm_ratios = I915_READ(PFIT_PGM_RATIOS);
+}
+
+static void vlv_crtc_clock_get(struct intel_crtc *crtc,
+			       struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = pipe_config->cpu_transcoder;
+	struct dpll clock;
+	u32 mdiv;
+	int refclk = 100000;
+
+	/* In case of DSI, DPLL will not be used */
+	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
+		return;
+
+	vlv_dpio_get(dev_priv);
+	mdiv = vlv_dpio_read(dev_priv, pipe, VLV_PLL_DW3(pipe));
+	vlv_dpio_put(dev_priv);
+
+	clock.m1 = (mdiv >> DPIO_M1DIV_SHIFT) & 7;
+	clock.m2 = mdiv & DPIO_M2DIV_MASK;
+	clock.n = (mdiv >> DPIO_N_SHIFT) & 0xf;
+	clock.p1 = (mdiv >> DPIO_P1_SHIFT) & 7;
+	clock.p2 = (mdiv >> DPIO_P2_SHIFT) & 0x1f;
+
+	pipe_config->port_clock = vlv_calc_dpll_params(refclk, &clock);
+}
+
+static void
+i9xx_get_initial_plane_config(struct intel_crtc *crtc,
+			      struct intel_initial_plane_config *plane_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_plane *plane = to_intel_plane(crtc->base.primary);
+	enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
+	enum pipe pipe;
+	u32 val, base, offset;
+	int fourcc, pixel_format;
+	unsigned int aligned_height;
+	struct drm_framebuffer *fb;
+	struct intel_framebuffer *intel_fb;
+
+	if (!plane->get_hw_state(plane, &pipe))
+		return;
+
+	WARN_ON(pipe != crtc->pipe);
+
+	intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
+	if (!intel_fb) {
+		DRM_DEBUG_KMS("failed to alloc fb\n");
+		return;
+	}
+
+	fb = &intel_fb->base;
+
+	fb->dev = dev;
+
+	val = I915_READ(DSPCNTR(i9xx_plane));
+
+	if (INTEL_GEN(dev_priv) >= 4) {
+		if (val & DISPPLANE_TILED) {
+			plane_config->tiling = I915_TILING_X;
+			fb->modifier = I915_FORMAT_MOD_X_TILED;
+		}
+
+		if (val & DISPPLANE_ROTATE_180)
+			plane_config->rotation = DRM_MODE_ROTATE_180;
+	}
+
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B &&
+	    val & DISPPLANE_MIRROR)
+		plane_config->rotation |= DRM_MODE_REFLECT_X;
+
+	pixel_format = val & DISPPLANE_PIXFORMAT_MASK;
+	fourcc = i9xx_format_to_fourcc(pixel_format);
+	fb->format = drm_format_info(fourcc);
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		offset = I915_READ(DSPOFFSET(i9xx_plane));
+		base = I915_READ(DSPSURF(i9xx_plane)) & 0xfffff000;
+	} else if (INTEL_GEN(dev_priv) >= 4) {
+		if (plane_config->tiling)
+			offset = I915_READ(DSPTILEOFF(i9xx_plane));
+		else
+			offset = I915_READ(DSPLINOFF(i9xx_plane));
+		base = I915_READ(DSPSURF(i9xx_plane)) & 0xfffff000;
+	} else {
+		base = I915_READ(DSPADDR(i9xx_plane));
+	}
+	plane_config->base = base;
+
+	val = I915_READ(PIPESRC(pipe));
+	fb->width = ((val >> 16) & 0xfff) + 1;
+	fb->height = ((val >> 0) & 0xfff) + 1;
+
+	val = I915_READ(DSPSTRIDE(i9xx_plane));
+	fb->pitches[0] = val & 0xffffffc0;
+
+	aligned_height = intel_fb_align_height(fb, 0, fb->height);
+
+	plane_config->size = fb->pitches[0] * aligned_height;
+
+	DRM_DEBUG_KMS("%s/%s with fb: size=%dx%d@%d, offset=%x, pitch %d, size 0x%x\n",
+		      crtc->base.name, plane->base.name, fb->width, fb->height,
+		      fb->format->cpp[0] * 8, base, fb->pitches[0],
+		      plane_config->size);
+
+	plane_config->fb = intel_fb;
+}
+
+static void chv_crtc_clock_get(struct intel_crtc *crtc,
+			       struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = pipe_config->cpu_transcoder;
+	enum dpio_channel port = vlv_pipe_to_channel(pipe);
+	struct dpll clock;
+	u32 cmn_dw13, pll_dw0, pll_dw1, pll_dw2, pll_dw3;
+	int refclk = 100000;
+
+	/* In case of DSI, DPLL will not be used */
+	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
+		return;
+
+	vlv_dpio_get(dev_priv);
+	cmn_dw13 = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW13(port));
+	pll_dw0 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW0(port));
+	pll_dw1 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW1(port));
+	pll_dw2 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW2(port));
+	pll_dw3 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW3(port));
+	vlv_dpio_put(dev_priv);
+
+	clock.m1 = (pll_dw1 & 0x7) == DPIO_CHV_M1_DIV_BY_2 ? 2 : 0;
+	clock.m2 = (pll_dw0 & 0xff) << 22;
+	if (pll_dw3 & DPIO_CHV_FRAC_DIV_EN)
+		clock.m2 |= pll_dw2 & 0x3fffff;
+	clock.n = (pll_dw1 >> DPIO_CHV_N_DIV_SHIFT) & 0xf;
+	clock.p1 = (cmn_dw13 >> DPIO_CHV_P1_DIV_SHIFT) & 0x7;
+	clock.p2 = (cmn_dw13 >> DPIO_CHV_P2_DIV_SHIFT) & 0x1f;
+
+	pipe_config->port_clock = chv_calc_dpll_params(refclk, &clock);
+}
+
+static void intel_get_crtc_ycbcr_config(struct intel_crtc *crtc,
+					struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum intel_output_format output = INTEL_OUTPUT_FORMAT_RGB;
+
+	pipe_config->lspcon_downsampling = false;
+
+	if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9) {
+		u32 tmp = I915_READ(PIPEMISC(crtc->pipe));
+
+		if (tmp & PIPEMISC_OUTPUT_COLORSPACE_YUV) {
+			bool ycbcr420_enabled = tmp & PIPEMISC_YUV420_ENABLE;
+			bool blend = tmp & PIPEMISC_YUV420_MODE_FULL_BLEND;
+
+			if (ycbcr420_enabled) {
+				/* We support 4:2:0 in full blend mode only */
+				if (!blend)
+					output = INTEL_OUTPUT_FORMAT_INVALID;
+				else if (!(IS_GEMINILAKE(dev_priv) ||
+					   INTEL_GEN(dev_priv) >= 10))
+					output = INTEL_OUTPUT_FORMAT_INVALID;
+				else
+					output = INTEL_OUTPUT_FORMAT_YCBCR420;
+			} else {
+				/*
+				 * Currently there is no interface defined to
+				 * check user preference between RGB/YCBCR444
+				 * or YCBCR420. So the only possible case for
+				 * YCBCR444 usage is driving YCBCR420 output
+				 * with LSPCON, when pipe is configured for
+				 * YCBCR444 output and LSPCON takes care of
+				 * downsampling it.
+				 */
+				pipe_config->lspcon_downsampling = true;
+				output = INTEL_OUTPUT_FORMAT_YCBCR444;
+			}
+		}
+	}
+
+	pipe_config->output_format = output;
+}
+
+static void i9xx_get_pipe_color_config(struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct intel_plane *plane = to_intel_plane(crtc->base.primary);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
+	u32 tmp;
+
+	tmp = I915_READ(DSPCNTR(i9xx_plane));
+
+	if (tmp & DISPPLANE_GAMMA_ENABLE)
+		crtc_state->gamma_enable = true;
+
+	if (!HAS_GMCH(dev_priv) &&
+	    tmp & DISPPLANE_PIPE_CSC_ENABLE)
+		crtc_state->csc_enable = true;
+}
+
+static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
+				 struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+	u32 tmp;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(crtc->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
+	pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
+	pipe_config->shared_dpll = NULL;
+
+	ret = false;
+
+	tmp = I915_READ(PIPECONF(crtc->pipe));
+	if (!(tmp & PIPECONF_ENABLE))
+		goto out;
+
+	if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
+	    IS_CHERRYVIEW(dev_priv)) {
+		switch (tmp & PIPECONF_BPC_MASK) {
+		case PIPECONF_6BPC:
+			pipe_config->pipe_bpp = 18;
+			break;
+		case PIPECONF_8BPC:
+			pipe_config->pipe_bpp = 24;
+			break;
+		case PIPECONF_10BPC:
+			pipe_config->pipe_bpp = 30;
+			break;
+		default:
+			break;
+		}
+	}
+
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	    (tmp & PIPECONF_COLOR_RANGE_SELECT))
+		pipe_config->limited_color_range = true;
+
+	pipe_config->gamma_mode = (tmp & PIPECONF_GAMMA_MODE_MASK_I9XX) >>
+		PIPECONF_GAMMA_MODE_SHIFT;
+
+	if (IS_CHERRYVIEW(dev_priv))
+		pipe_config->cgm_mode = I915_READ(CGM_PIPE_MODE(crtc->pipe));
+
+	i9xx_get_pipe_color_config(pipe_config);
+	intel_color_get_config(pipe_config);
+
+	if (INTEL_GEN(dev_priv) < 4)
+		pipe_config->double_wide = tmp & PIPECONF_DOUBLE_WIDE;
+
+	intel_get_pipe_timings(crtc, pipe_config);
+	intel_get_pipe_src_size(crtc, pipe_config);
+
+	i9xx_get_pfit_config(crtc, pipe_config);
+
+	if (INTEL_GEN(dev_priv) >= 4) {
+		/* No way to read it out on pipes B and C */
+		if (IS_CHERRYVIEW(dev_priv) && crtc->pipe != PIPE_A)
+			tmp = dev_priv->chv_dpll_md[crtc->pipe];
+		else
+			tmp = I915_READ(DPLL_MD(crtc->pipe));
+		pipe_config->pixel_multiplier =
+			((tmp & DPLL_MD_UDI_MULTIPLIER_MASK)
+			 >> DPLL_MD_UDI_MULTIPLIER_SHIFT) + 1;
+		pipe_config->dpll_hw_state.dpll_md = tmp;
+	} else if (IS_I945G(dev_priv) || IS_I945GM(dev_priv) ||
+		   IS_G33(dev_priv) || IS_PINEVIEW(dev_priv)) {
+		tmp = I915_READ(DPLL(crtc->pipe));
+		pipe_config->pixel_multiplier =
+			((tmp & SDVO_MULTIPLIER_MASK)
+			 >> SDVO_MULTIPLIER_SHIFT_HIRES) + 1;
+	} else {
+		/* Note that on i915G/GM the pixel multiplier is in the sdvo
+		 * port and will be fixed up in the encoder->get_config
+		 * function. */
+		pipe_config->pixel_multiplier = 1;
+	}
+	pipe_config->dpll_hw_state.dpll = I915_READ(DPLL(crtc->pipe));
+	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) {
+		pipe_config->dpll_hw_state.fp0 = I915_READ(FP0(crtc->pipe));
+		pipe_config->dpll_hw_state.fp1 = I915_READ(FP1(crtc->pipe));
+	} else {
+		/* Mask out read-only status bits. */
+		pipe_config->dpll_hw_state.dpll &= ~(DPLL_LOCK_VLV |
+						     DPLL_PORTC_READY_MASK |
+						     DPLL_PORTB_READY_MASK);
+	}
+
+	if (IS_CHERRYVIEW(dev_priv))
+		chv_crtc_clock_get(crtc, pipe_config);
+	else if (IS_VALLEYVIEW(dev_priv))
+		vlv_crtc_clock_get(crtc, pipe_config);
+	else
+		i9xx_crtc_clock_get(crtc, pipe_config);
+
+	/*
+	 * Normally the dotclock is filled in by the encoder .get_config()
+	 * but in case the pipe is enabled w/o any ports we need a sane
+	 * default.
+	 */
+	pipe_config->base.adjusted_mode.crtc_clock =
+		pipe_config->port_clock / pipe_config->pixel_multiplier;
+
+	ret = true;
+
+out:
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static void ironlake_init_pch_refclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+	int i;
+	u32 val, final;
+	bool has_lvds = false;
+	bool has_cpu_edp = false;
+	bool has_panel = false;
+	bool has_ck505 = false;
+	bool can_ssc = false;
+	bool using_ssc_source = false;
+
+	/* We need to take the global config into account */
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		switch (encoder->type) {
+		case INTEL_OUTPUT_LVDS:
+			has_panel = true;
+			has_lvds = true;
+			break;
+		case INTEL_OUTPUT_EDP:
+			has_panel = true;
+			if (encoder->port == PORT_A)
+				has_cpu_edp = true;
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (HAS_PCH_IBX(dev_priv)) {
+		has_ck505 = dev_priv->vbt.display_clock_mode;
+		can_ssc = has_ck505;
+	} else {
+		has_ck505 = false;
+		can_ssc = true;
+	}
+
+	/* Check if any DPLLs are using the SSC source */
+	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+		u32 temp = I915_READ(PCH_DPLL(i));
+
+		if (!(temp & DPLL_VCO_ENABLE))
+			continue;
+
+		if ((temp & PLL_REF_INPUT_MASK) ==
+		    PLLB_REF_INPUT_SPREADSPECTRUMIN) {
+			using_ssc_source = true;
+			break;
+		}
+	}
+
+	DRM_DEBUG_KMS("has_panel %d has_lvds %d has_ck505 %d using_ssc_source %d\n",
+		      has_panel, has_lvds, has_ck505, using_ssc_source);
+
+	/* Ironlake: try to setup display ref clock before DPLL
+	 * enabling. This is only under driver's control after
+	 * PCH B stepping, previous chipset stepping should be
+	 * ignoring this setting.
+	 */
+	val = I915_READ(PCH_DREF_CONTROL);
+
+	/* As we must carefully and slowly disable/enable each source in turn,
+	 * compute the final state we want first and check if we need to
+	 * make any changes at all.
+	 */
+	final = val;
+	final &= ~DREF_NONSPREAD_SOURCE_MASK;
+	if (has_ck505)
+		final |= DREF_NONSPREAD_CK505_ENABLE;
+	else
+		final |= DREF_NONSPREAD_SOURCE_ENABLE;
+
+	final &= ~DREF_SSC_SOURCE_MASK;
+	final &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
+	final &= ~DREF_SSC1_ENABLE;
+
+	if (has_panel) {
+		final |= DREF_SSC_SOURCE_ENABLE;
+
+		if (intel_panel_use_ssc(dev_priv) && can_ssc)
+			final |= DREF_SSC1_ENABLE;
+
+		if (has_cpu_edp) {
+			if (intel_panel_use_ssc(dev_priv) && can_ssc)
+				final |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
+			else
+				final |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
+		} else
+			final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
+	} else if (using_ssc_source) {
+		final |= DREF_SSC_SOURCE_ENABLE;
+		final |= DREF_SSC1_ENABLE;
+	}
+
+	if (final == val)
+		return;
+
+	/* Always enable nonspread source */
+	val &= ~DREF_NONSPREAD_SOURCE_MASK;
+
+	if (has_ck505)
+		val |= DREF_NONSPREAD_CK505_ENABLE;
+	else
+		val |= DREF_NONSPREAD_SOURCE_ENABLE;
+
+	if (has_panel) {
+		val &= ~DREF_SSC_SOURCE_MASK;
+		val |= DREF_SSC_SOURCE_ENABLE;
+
+		/* SSC must be turned on before enabling the CPU output  */
+		if (intel_panel_use_ssc(dev_priv) && can_ssc) {
+			DRM_DEBUG_KMS("Using SSC on panel\n");
+			val |= DREF_SSC1_ENABLE;
+		} else
+			val &= ~DREF_SSC1_ENABLE;
+
+		/* Get SSC going before enabling the outputs */
+		I915_WRITE(PCH_DREF_CONTROL, val);
+		POSTING_READ(PCH_DREF_CONTROL);
+		udelay(200);
+
+		val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
+
+		/* Enable CPU source on CPU attached eDP */
+		if (has_cpu_edp) {
+			if (intel_panel_use_ssc(dev_priv) && can_ssc) {
+				DRM_DEBUG_KMS("Using SSC on eDP\n");
+				val |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
+			} else
+				val |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
+		} else
+			val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
+
+		I915_WRITE(PCH_DREF_CONTROL, val);
+		POSTING_READ(PCH_DREF_CONTROL);
+		udelay(200);
+	} else {
+		DRM_DEBUG_KMS("Disabling CPU source output\n");
+
+		val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
+
+		/* Turn off CPU output */
+		val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
+
+		I915_WRITE(PCH_DREF_CONTROL, val);
+		POSTING_READ(PCH_DREF_CONTROL);
+		udelay(200);
+
+		if (!using_ssc_source) {
+			DRM_DEBUG_KMS("Disabling SSC source\n");
+
+			/* Turn off the SSC source */
+			val &= ~DREF_SSC_SOURCE_MASK;
+			val |= DREF_SSC_SOURCE_DISABLE;
+
+			/* Turn off SSC1 */
+			val &= ~DREF_SSC1_ENABLE;
+
+			I915_WRITE(PCH_DREF_CONTROL, val);
+			POSTING_READ(PCH_DREF_CONTROL);
+			udelay(200);
+		}
+	}
+
+	BUG_ON(val != final);
+}
+
+static void lpt_reset_fdi_mphy(struct drm_i915_private *dev_priv)
+{
+	u32 tmp;
+
+	tmp = I915_READ(SOUTH_CHICKEN2);
+	tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
+	I915_WRITE(SOUTH_CHICKEN2, tmp);
+
+	if (wait_for_us(I915_READ(SOUTH_CHICKEN2) &
+			FDI_MPHY_IOSFSB_RESET_STATUS, 100))
+		DRM_ERROR("FDI mPHY reset assert timeout\n");
+
+	tmp = I915_READ(SOUTH_CHICKEN2);
+	tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
+	I915_WRITE(SOUTH_CHICKEN2, tmp);
+
+	if (wait_for_us((I915_READ(SOUTH_CHICKEN2) &
+			 FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
+		DRM_ERROR("FDI mPHY reset de-assert timeout\n");
+}
+
+/* WaMPhyProgramming:hsw */
+static void lpt_program_fdi_mphy(struct drm_i915_private *dev_priv)
+{
+	u32 tmp;
+
+	tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
+	tmp &= ~(0xFF << 24);
+	tmp |= (0x12 << 24);
+	intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
+	tmp |= (1 << 11);
+	intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
+	tmp |= (1 << 11);
+	intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
+	tmp |= (1 << 24) | (1 << 21) | (1 << 18);
+	intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
+	tmp |= (1 << 24) | (1 << 21) | (1 << 18);
+	intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
+	tmp &= ~(7 << 13);
+	tmp |= (5 << 13);
+	intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
+	tmp &= ~(7 << 13);
+	tmp |= (5 << 13);
+	intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
+	tmp &= ~0xFF;
+	tmp |= 0x1C;
+	intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
+	tmp &= ~0xFF;
+	tmp |= 0x1C;
+	intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
+	tmp &= ~(0xFF << 16);
+	tmp |= (0x1C << 16);
+	intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
+	tmp &= ~(0xFF << 16);
+	tmp |= (0x1C << 16);
+	intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
+	tmp |= (1 << 27);
+	intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
+	tmp |= (1 << 27);
+	intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
+	tmp &= ~(0xF << 28);
+	tmp |= (4 << 28);
+	intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
+
+	tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
+	tmp &= ~(0xF << 28);
+	tmp |= (4 << 28);
+	intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
+}
+
+/* Implements 3 different sequences from BSpec chapter "Display iCLK
+ * Programming" based on the parameters passed:
+ * - Sequence to enable CLKOUT_DP
+ * - Sequence to enable CLKOUT_DP without spread
+ * - Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O
+ */
+static void lpt_enable_clkout_dp(struct drm_i915_private *dev_priv,
+				 bool with_spread, bool with_fdi)
+{
+	u32 reg, tmp;
+
+	if (WARN(with_fdi && !with_spread, "FDI requires downspread\n"))
+		with_spread = true;
+	if (WARN(HAS_PCH_LPT_LP(dev_priv) &&
+	    with_fdi, "LP PCH doesn't have FDI\n"))
+		with_fdi = false;
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
+	tmp &= ~SBI_SSCCTL_DISABLE;
+	tmp |= SBI_SSCCTL_PATHALT;
+	intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+
+	udelay(24);
+
+	if (with_spread) {
+		tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
+		tmp &= ~SBI_SSCCTL_PATHALT;
+		intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+
+		if (with_fdi) {
+			lpt_reset_fdi_mphy(dev_priv);
+			lpt_program_fdi_mphy(dev_priv);
+		}
+	}
+
+	reg = HAS_PCH_LPT_LP(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
+	tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
+	tmp |= SBI_GEN0_CFG_BUFFENABLE_DISABLE;
+	intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
+
+	mutex_unlock(&dev_priv->sb_lock);
+}
+
+/* Sequence to disable CLKOUT_DP */
+void lpt_disable_clkout_dp(struct drm_i915_private *dev_priv)
+{
+	u32 reg, tmp;
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	reg = HAS_PCH_LPT_LP(dev_priv) ? SBI_GEN0 : SBI_DBUFF0;
+	tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
+	tmp &= ~SBI_GEN0_CFG_BUFFENABLE_DISABLE;
+	intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
+
+	tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
+	if (!(tmp & SBI_SSCCTL_DISABLE)) {
+		if (!(tmp & SBI_SSCCTL_PATHALT)) {
+			tmp |= SBI_SSCCTL_PATHALT;
+			intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+			udelay(32);
+		}
+		tmp |= SBI_SSCCTL_DISABLE;
+		intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
+	}
+
+	mutex_unlock(&dev_priv->sb_lock);
+}
+
+#define BEND_IDX(steps) ((50 + (steps)) / 5)
+
+static const u16 sscdivintphase[] = {
+	[BEND_IDX( 50)] = 0x3B23,
+	[BEND_IDX( 45)] = 0x3B23,
+	[BEND_IDX( 40)] = 0x3C23,
+	[BEND_IDX( 35)] = 0x3C23,
+	[BEND_IDX( 30)] = 0x3D23,
+	[BEND_IDX( 25)] = 0x3D23,
+	[BEND_IDX( 20)] = 0x3E23,
+	[BEND_IDX( 15)] = 0x3E23,
+	[BEND_IDX( 10)] = 0x3F23,
+	[BEND_IDX(  5)] = 0x3F23,
+	[BEND_IDX(  0)] = 0x0025,
+	[BEND_IDX( -5)] = 0x0025,
+	[BEND_IDX(-10)] = 0x0125,
+	[BEND_IDX(-15)] = 0x0125,
+	[BEND_IDX(-20)] = 0x0225,
+	[BEND_IDX(-25)] = 0x0225,
+	[BEND_IDX(-30)] = 0x0325,
+	[BEND_IDX(-35)] = 0x0325,
+	[BEND_IDX(-40)] = 0x0425,
+	[BEND_IDX(-45)] = 0x0425,
+	[BEND_IDX(-50)] = 0x0525,
+};
+
+/*
+ * Bend CLKOUT_DP
+ * steps -50 to 50 inclusive, in steps of 5
+ * < 0 slow down the clock, > 0 speed up the clock, 0 == no bend (135MHz)
+ * change in clock period = -(steps / 10) * 5.787 ps
+ */
+static void lpt_bend_clkout_dp(struct drm_i915_private *dev_priv, int steps)
+{
+	u32 tmp;
+	int idx = BEND_IDX(steps);
+
+	if (WARN_ON(steps % 5 != 0))
+		return;
+
+	if (WARN_ON(idx >= ARRAY_SIZE(sscdivintphase)))
+		return;
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	if (steps % 10 != 0)
+		tmp = 0xAAAAAAAB;
+	else
+		tmp = 0x00000000;
+	intel_sbi_write(dev_priv, SBI_SSCDITHPHASE, tmp, SBI_ICLK);
+
+	tmp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE, SBI_ICLK);
+	tmp &= 0xffff0000;
+	tmp |= sscdivintphase[idx];
+	intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE, tmp, SBI_ICLK);
+
+	mutex_unlock(&dev_priv->sb_lock);
+}
+
+#undef BEND_IDX
+
+static bool spll_uses_pch_ssc(struct drm_i915_private *dev_priv)
+{
+	u32 fuse_strap = I915_READ(FUSE_STRAP);
+	u32 ctl = I915_READ(SPLL_CTL);
+
+	if ((ctl & SPLL_PLL_ENABLE) == 0)
+		return false;
+
+	if ((ctl & SPLL_REF_MASK) == SPLL_REF_MUXED_SSC &&
+	    (fuse_strap & HSW_CPU_SSC_ENABLE) == 0)
+		return true;
+
+	if (IS_BROADWELL(dev_priv) &&
+	    (ctl & SPLL_REF_MASK) == SPLL_REF_PCH_SSC_BDW)
+		return true;
+
+	return false;
+}
+
+static bool wrpll_uses_pch_ssc(struct drm_i915_private *dev_priv,
+			       enum intel_dpll_id id)
+{
+	u32 fuse_strap = I915_READ(FUSE_STRAP);
+	u32 ctl = I915_READ(WRPLL_CTL(id));
+
+	if ((ctl & WRPLL_PLL_ENABLE) == 0)
+		return false;
+
+	if ((ctl & WRPLL_REF_MASK) == WRPLL_REF_PCH_SSC)
+		return true;
+
+	if ((IS_BROADWELL(dev_priv) || IS_HSW_ULT(dev_priv)) &&
+	    (ctl & WRPLL_REF_MASK) == WRPLL_REF_MUXED_SSC_BDW &&
+	    (fuse_strap & HSW_CPU_SSC_ENABLE) == 0)
+		return true;
+
+	return false;
+}
+
+static void lpt_init_pch_refclk(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+	bool pch_ssc_in_use = false;
+	bool has_fdi = false;
+
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		switch (encoder->type) {
+		case INTEL_OUTPUT_ANALOG:
+			has_fdi = true;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/*
+	 * The BIOS may have decided to use the PCH SSC
+	 * reference so we must not disable it until the
+	 * relevant PLLs have stopped relying on it. We'll
+	 * just leave the PCH SSC reference enabled in case
+	 * any active PLL is using it. It will get disabled
+	 * after runtime suspend if we don't have FDI.
+	 *
+	 * TODO: Move the whole reference clock handling
+	 * to the modeset sequence proper so that we can
+	 * actually enable/disable/reconfigure these things
+	 * safely. To do that we need to introduce a real
+	 * clock hierarchy. That would also allow us to do
+	 * clock bending finally.
+	 */
+	if (spll_uses_pch_ssc(dev_priv)) {
+		DRM_DEBUG_KMS("SPLL using PCH SSC\n");
+		pch_ssc_in_use = true;
+	}
+
+	if (wrpll_uses_pch_ssc(dev_priv, DPLL_ID_WRPLL1)) {
+		DRM_DEBUG_KMS("WRPLL1 using PCH SSC\n");
+		pch_ssc_in_use = true;
+	}
+
+	if (wrpll_uses_pch_ssc(dev_priv, DPLL_ID_WRPLL2)) {
+		DRM_DEBUG_KMS("WRPLL2 using PCH SSC\n");
+		pch_ssc_in_use = true;
+	}
+
+	if (pch_ssc_in_use)
+		return;
+
+	if (has_fdi) {
+		lpt_bend_clkout_dp(dev_priv, 0);
+		lpt_enable_clkout_dp(dev_priv, true, true);
+	} else {
+		lpt_disable_clkout_dp(dev_priv);
+	}
+}
+
+/*
+ * Initialize reference clocks when the driver loads
+ */
+void intel_init_pch_refclk(struct drm_i915_private *dev_priv)
+{
+	if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv))
+		ironlake_init_pch_refclk(dev_priv);
+	else if (HAS_PCH_LPT(dev_priv))
+		lpt_init_pch_refclk(dev_priv);
+}
+
+static void ironlake_set_pipeconf(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 val;
+
+	val = 0;
+
+	switch (crtc_state->pipe_bpp) {
+	case 18:
+		val |= PIPECONF_6BPC;
+		break;
+	case 24:
+		val |= PIPECONF_8BPC;
+		break;
+	case 30:
+		val |= PIPECONF_10BPC;
+		break;
+	case 36:
+		val |= PIPECONF_12BPC;
+		break;
+	default:
+		/* Case prevented by intel_choose_pipe_bpp_dither. */
+		BUG();
+	}
+
+	if (crtc_state->dither)
+		val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
+
+	if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
+		val |= PIPECONF_INTERLACED_ILK;
+	else
+		val |= PIPECONF_PROGRESSIVE;
+
+	if (crtc_state->limited_color_range)
+		val |= PIPECONF_COLOR_RANGE_SELECT;
+
+	val |= PIPECONF_GAMMA_MODE(crtc_state->gamma_mode);
+
+	I915_WRITE(PIPECONF(pipe), val);
+	POSTING_READ(PIPECONF(pipe));
+}
+
+static void haswell_set_pipeconf(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 val = 0;
+
+	if (IS_HASWELL(dev_priv) && crtc_state->dither)
+		val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
+
+	if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
+		val |= PIPECONF_INTERLACED_ILK;
+	else
+		val |= PIPECONF_PROGRESSIVE;
+
+	I915_WRITE(PIPECONF(cpu_transcoder), val);
+	POSTING_READ(PIPECONF(cpu_transcoder));
+}
+
+static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 val = 0;
+
+	switch (crtc_state->pipe_bpp) {
+	case 18:
+		val |= PIPEMISC_DITHER_6_BPC;
+		break;
+	case 24:
+		val |= PIPEMISC_DITHER_8_BPC;
+		break;
+	case 30:
+		val |= PIPEMISC_DITHER_10_BPC;
+		break;
+	case 36:
+		val |= PIPEMISC_DITHER_12_BPC;
+		break;
+	default:
+		MISSING_CASE(crtc_state->pipe_bpp);
+		break;
+	}
+
+	if (crtc_state->dither)
+		val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
+
+	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
+	    crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444)
+		val |= PIPEMISC_OUTPUT_COLORSPACE_YUV;
+
+	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+		val |= PIPEMISC_YUV420_ENABLE |
+			PIPEMISC_YUV420_MODE_FULL_BLEND;
+
+	if (INTEL_GEN(dev_priv) >= 11 &&
+	    (crtc_state->active_planes & ~(icl_hdr_plane_mask() |
+					   BIT(PLANE_CURSOR))) == 0)
+		val |= PIPEMISC_HDR_MODE_PRECISION;
+
+	I915_WRITE(PIPEMISC(crtc->pipe), val);
+}
+
+int bdw_get_pipemisc_bpp(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 tmp;
+
+	tmp = I915_READ(PIPEMISC(crtc->pipe));
+
+	switch (tmp & PIPEMISC_DITHER_BPC_MASK) {
+	case PIPEMISC_DITHER_6_BPC:
+		return 18;
+	case PIPEMISC_DITHER_8_BPC:
+		return 24;
+	case PIPEMISC_DITHER_10_BPC:
+		return 30;
+	case PIPEMISC_DITHER_12_BPC:
+		return 36;
+	default:
+		MISSING_CASE(tmp);
+		return 0;
+	}
+}
+
+int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
+{
+	/*
+	 * Account for spread spectrum to avoid
+	 * oversubscribing the link. Max center spread
+	 * is 2.5%; use 5% for safety's sake.
+	 */
+	u32 bps = target_clock * bpp * 21 / 20;
+	return DIV_ROUND_UP(bps, link_bw * 8);
+}
+
+static bool ironlake_needs_fb_cb_tune(struct dpll *dpll, int factor)
+{
+	return i9xx_dpll_compute_m(dpll) < factor * dpll->n;
+}
+
+static void ironlake_compute_dpll(struct intel_crtc *crtc,
+				  struct intel_crtc_state *crtc_state,
+				  struct dpll *reduced_clock)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 dpll, fp, fp2;
+	int factor;
+
+	/* Enable autotuning of the PLL clock (if permissible) */
+	factor = 21;
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		if ((intel_panel_use_ssc(dev_priv) &&
+		     dev_priv->vbt.lvds_ssc_freq == 100000) ||
+		    (HAS_PCH_IBX(dev_priv) &&
+		     intel_is_dual_link_lvds(dev_priv)))
+			factor = 25;
+	} else if (crtc_state->sdvo_tv_clock) {
+		factor = 20;
+	}
+
+	fp = i9xx_dpll_compute_fp(&crtc_state->dpll);
+
+	if (ironlake_needs_fb_cb_tune(&crtc_state->dpll, factor))
+		fp |= FP_CB_TUNE;
+
+	if (reduced_clock) {
+		fp2 = i9xx_dpll_compute_fp(reduced_clock);
+
+		if (reduced_clock->m < factor * reduced_clock->n)
+			fp2 |= FP_CB_TUNE;
+	} else {
+		fp2 = fp;
+	}
+
+	dpll = 0;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS))
+		dpll |= DPLLB_MODE_LVDS;
+	else
+		dpll |= DPLLB_MODE_DAC_SERIAL;
+
+	dpll |= (crtc_state->pixel_multiplier - 1)
+		<< PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO) ||
+	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+		dpll |= DPLL_SDVO_HIGH_SPEED;
+
+	if (intel_crtc_has_dp_encoder(crtc_state))
+		dpll |= DPLL_SDVO_HIGH_SPEED;
+
+	/*
+	 * The high speed IO clock is only really required for
+	 * SDVO/HDMI/DP, but we also enable it for CRT to make it
+	 * possible to share the DPLL between CRT and HDMI. Enabling
+	 * the clock needlessly does no real harm, except use up a
+	 * bit of power potentially.
+	 *
+	 * We'll limit this to IVB with 3 pipes, since it has only two
+	 * DPLLs and so DPLL sharing is the only way to get three pipes
+	 * driving PCH ports at the same time. On SNB we could do this,
+	 * and potentially avoid enabling the second DPLL, but it's not
+	 * clear if it''s a win or loss power wise. No point in doing
+	 * this on ILK at all since it has a fixed DPLL<->pipe mapping.
+	 */
+	if (INTEL_INFO(dev_priv)->num_pipes == 3 &&
+	    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG))
+		dpll |= DPLL_SDVO_HIGH_SPEED;
+
+	/* compute bitmask from p1 value */
+	dpll |= (1 << (crtc_state->dpll.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+	/* also FPA1 */
+	dpll |= (1 << (crtc_state->dpll.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
+
+	switch (crtc_state->dpll.p2) {
+	case 5:
+		dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+		break;
+	case 7:
+		dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+		break;
+	case 10:
+		dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+		break;
+	case 14:
+		dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+		break;
+	}
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+	    intel_panel_use_ssc(dev_priv))
+		dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+	else
+		dpll |= PLL_REF_INPUT_DREFCLK;
+
+	dpll |= DPLL_VCO_ENABLE;
+
+	crtc_state->dpll_hw_state.dpll = dpll;
+	crtc_state->dpll_hw_state.fp0 = fp;
+	crtc_state->dpll_hw_state.fp1 = fp2;
+}
+
+static int ironlake_crtc_compute_clock(struct intel_crtc *crtc,
+				       struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct intel_limit *limit;
+	int refclk = 120000;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	/* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
+	if (!crtc_state->has_pch_encoder)
+		return 0;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+		if (intel_panel_use_ssc(dev_priv)) {
+			DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n",
+				      dev_priv->vbt.lvds_ssc_freq);
+			refclk = dev_priv->vbt.lvds_ssc_freq;
+		}
+
+		if (intel_is_dual_link_lvds(dev_priv)) {
+			if (refclk == 100000)
+				limit = &intel_limits_ironlake_dual_lvds_100m;
+			else
+				limit = &intel_limits_ironlake_dual_lvds;
+		} else {
+			if (refclk == 100000)
+				limit = &intel_limits_ironlake_single_lvds_100m;
+			else
+				limit = &intel_limits_ironlake_single_lvds;
+		}
+	} else {
+		limit = &intel_limits_ironlake_dac;
+	}
+
+	if (!crtc_state->clock_set &&
+	    !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+				refclk, NULL, &crtc_state->dpll)) {
+		DRM_ERROR("Couldn't find PLL settings for mode!\n");
+		return -EINVAL;
+	}
+
+	ironlake_compute_dpll(crtc, crtc_state, NULL);
+
+	if (!intel_get_shared_dpll(crtc_state, NULL)) {
+		DRM_DEBUG_KMS("failed to find PLL for pipe %c\n",
+			      pipe_name(crtc->pipe));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void intel_pch_transcoder_get_m_n(struct intel_crtc *crtc,
+					 struct intel_link_m_n *m_n)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+
+	m_n->link_m = I915_READ(PCH_TRANS_LINK_M1(pipe));
+	m_n->link_n = I915_READ(PCH_TRANS_LINK_N1(pipe));
+	m_n->gmch_m = I915_READ(PCH_TRANS_DATA_M1(pipe))
+		& ~TU_SIZE_MASK;
+	m_n->gmch_n = I915_READ(PCH_TRANS_DATA_N1(pipe));
+	m_n->tu = ((I915_READ(PCH_TRANS_DATA_M1(pipe))
+		    & TU_SIZE_MASK) >> TU_SIZE_SHIFT) + 1;
+}
+
+static void intel_cpu_transcoder_get_m_n(struct intel_crtc *crtc,
+					 enum transcoder transcoder,
+					 struct intel_link_m_n *m_n,
+					 struct intel_link_m_n *m2_n2)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+
+	if (INTEL_GEN(dev_priv) >= 5) {
+		m_n->link_m = I915_READ(PIPE_LINK_M1(transcoder));
+		m_n->link_n = I915_READ(PIPE_LINK_N1(transcoder));
+		m_n->gmch_m = I915_READ(PIPE_DATA_M1(transcoder))
+			& ~TU_SIZE_MASK;
+		m_n->gmch_n = I915_READ(PIPE_DATA_N1(transcoder));
+		m_n->tu = ((I915_READ(PIPE_DATA_M1(transcoder))
+			    & TU_SIZE_MASK) >> TU_SIZE_SHIFT) + 1;
+
+		if (m2_n2 && transcoder_has_m2_n2(dev_priv, transcoder)) {
+			m2_n2->link_m = I915_READ(PIPE_LINK_M2(transcoder));
+			m2_n2->link_n =	I915_READ(PIPE_LINK_N2(transcoder));
+			m2_n2->gmch_m =	I915_READ(PIPE_DATA_M2(transcoder))
+					& ~TU_SIZE_MASK;
+			m2_n2->gmch_n =	I915_READ(PIPE_DATA_N2(transcoder));
+			m2_n2->tu = ((I915_READ(PIPE_DATA_M2(transcoder))
+					& TU_SIZE_MASK) >> TU_SIZE_SHIFT) + 1;
+		}
+	} else {
+		m_n->link_m = I915_READ(PIPE_LINK_M_G4X(pipe));
+		m_n->link_n = I915_READ(PIPE_LINK_N_G4X(pipe));
+		m_n->gmch_m = I915_READ(PIPE_DATA_M_G4X(pipe))
+			& ~TU_SIZE_MASK;
+		m_n->gmch_n = I915_READ(PIPE_DATA_N_G4X(pipe));
+		m_n->tu = ((I915_READ(PIPE_DATA_M_G4X(pipe))
+			    & TU_SIZE_MASK) >> TU_SIZE_SHIFT) + 1;
+	}
+}
+
+void intel_dp_get_m_n(struct intel_crtc *crtc,
+		      struct intel_crtc_state *pipe_config)
+{
+	if (pipe_config->has_pch_encoder)
+		intel_pch_transcoder_get_m_n(crtc, &pipe_config->dp_m_n);
+	else
+		intel_cpu_transcoder_get_m_n(crtc, pipe_config->cpu_transcoder,
+					     &pipe_config->dp_m_n,
+					     &pipe_config->dp_m2_n2);
+}
+
+static void ironlake_get_fdi_m_n_config(struct intel_crtc *crtc,
+					struct intel_crtc_state *pipe_config)
+{
+	intel_cpu_transcoder_get_m_n(crtc, pipe_config->cpu_transcoder,
+				     &pipe_config->fdi_m_n, NULL);
+}
+
+static void skylake_get_pfit_config(struct intel_crtc *crtc,
+				    struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc_scaler_state *scaler_state = &pipe_config->scaler_state;
+	u32 ps_ctrl = 0;
+	int id = -1;
+	int i;
+
+	/* find scaler attached to this pipe */
+	for (i = 0; i < crtc->num_scalers; i++) {
+		ps_ctrl = I915_READ(SKL_PS_CTRL(crtc->pipe, i));
+		if (ps_ctrl & PS_SCALER_EN && !(ps_ctrl & PS_PLANE_SEL_MASK)) {
+			id = i;
+			pipe_config->pch_pfit.enabled = true;
+			pipe_config->pch_pfit.pos = I915_READ(SKL_PS_WIN_POS(crtc->pipe, i));
+			pipe_config->pch_pfit.size = I915_READ(SKL_PS_WIN_SZ(crtc->pipe, i));
+			scaler_state->scalers[i].in_use = true;
+			break;
+		}
+	}
+
+	scaler_state->scaler_id = id;
+	if (id >= 0) {
+		scaler_state->scaler_users |= (1 << SKL_CRTC_INDEX);
+	} else {
+		scaler_state->scaler_users &= ~(1 << SKL_CRTC_INDEX);
+	}
+}
+
+static void
+skylake_get_initial_plane_config(struct intel_crtc *crtc,
+				 struct intel_initial_plane_config *plane_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_plane *plane = to_intel_plane(crtc->base.primary);
+	enum plane_id plane_id = plane->id;
+	enum pipe pipe;
+	u32 val, base, offset, stride_mult, tiling, alpha;
+	int fourcc, pixel_format;
+	unsigned int aligned_height;
+	struct drm_framebuffer *fb;
+	struct intel_framebuffer *intel_fb;
+
+	if (!plane->get_hw_state(plane, &pipe))
+		return;
+
+	WARN_ON(pipe != crtc->pipe);
+
+	intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
+	if (!intel_fb) {
+		DRM_DEBUG_KMS("failed to alloc fb\n");
+		return;
+	}
+
+	fb = &intel_fb->base;
+
+	fb->dev = dev;
+
+	val = I915_READ(PLANE_CTL(pipe, plane_id));
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		pixel_format = val & ICL_PLANE_CTL_FORMAT_MASK;
+	else
+		pixel_format = val & PLANE_CTL_FORMAT_MASK;
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+		alpha = I915_READ(PLANE_COLOR_CTL(pipe, plane_id));
+		alpha &= PLANE_COLOR_ALPHA_MASK;
+	} else {
+		alpha = val & PLANE_CTL_ALPHA_MASK;
+	}
+
+	fourcc = skl_format_to_fourcc(pixel_format,
+				      val & PLANE_CTL_ORDER_RGBX, alpha);
+	fb->format = drm_format_info(fourcc);
+
+	tiling = val & PLANE_CTL_TILED_MASK;
+	switch (tiling) {
+	case PLANE_CTL_TILED_LINEAR:
+		fb->modifier = DRM_FORMAT_MOD_LINEAR;
+		break;
+	case PLANE_CTL_TILED_X:
+		plane_config->tiling = I915_TILING_X;
+		fb->modifier = I915_FORMAT_MOD_X_TILED;
+		break;
+	case PLANE_CTL_TILED_Y:
+		plane_config->tiling = I915_TILING_Y;
+		if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
+			fb->modifier = I915_FORMAT_MOD_Y_TILED_CCS;
+		else
+			fb->modifier = I915_FORMAT_MOD_Y_TILED;
+		break;
+	case PLANE_CTL_TILED_YF:
+		if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
+			fb->modifier = I915_FORMAT_MOD_Yf_TILED_CCS;
+		else
+			fb->modifier = I915_FORMAT_MOD_Yf_TILED;
+		break;
+	default:
+		MISSING_CASE(tiling);
+		goto error;
+	}
+
+	/*
+	 * DRM_MODE_ROTATE_ is counter clockwise to stay compatible with Xrandr
+	 * while i915 HW rotation is clockwise, thats why this swapping.
+	 */
+	switch (val & PLANE_CTL_ROTATE_MASK) {
+	case PLANE_CTL_ROTATE_0:
+		plane_config->rotation = DRM_MODE_ROTATE_0;
+		break;
+	case PLANE_CTL_ROTATE_90:
+		plane_config->rotation = DRM_MODE_ROTATE_270;
+		break;
+	case PLANE_CTL_ROTATE_180:
+		plane_config->rotation = DRM_MODE_ROTATE_180;
+		break;
+	case PLANE_CTL_ROTATE_270:
+		plane_config->rotation = DRM_MODE_ROTATE_90;
+		break;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 10 &&
+	    val & PLANE_CTL_FLIP_HORIZONTAL)
+		plane_config->rotation |= DRM_MODE_REFLECT_X;
+
+	base = I915_READ(PLANE_SURF(pipe, plane_id)) & 0xfffff000;
+	plane_config->base = base;
+
+	offset = I915_READ(PLANE_OFFSET(pipe, plane_id));
+
+	val = I915_READ(PLANE_SIZE(pipe, plane_id));
+	fb->height = ((val >> 16) & 0xfff) + 1;
+	fb->width = ((val >> 0) & 0x1fff) + 1;
+
+	val = I915_READ(PLANE_STRIDE(pipe, plane_id));
+	stride_mult = skl_plane_stride_mult(fb, 0, DRM_MODE_ROTATE_0);
+	fb->pitches[0] = (val & 0x3ff) * stride_mult;
+
+	aligned_height = intel_fb_align_height(fb, 0, fb->height);
+
+	plane_config->size = fb->pitches[0] * aligned_height;
+
+	DRM_DEBUG_KMS("%s/%s with fb: size=%dx%d@%d, offset=%x, pitch %d, size 0x%x\n",
+		      crtc->base.name, plane->base.name, fb->width, fb->height,
+		      fb->format->cpp[0] * 8, base, fb->pitches[0],
+		      plane_config->size);
+
+	plane_config->fb = intel_fb;
+	return;
+
+error:
+	kfree(intel_fb);
+}
+
+static void ironlake_get_pfit_config(struct intel_crtc *crtc,
+				     struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 tmp;
+
+	tmp = I915_READ(PF_CTL(crtc->pipe));
+
+	if (tmp & PF_ENABLE) {
+		pipe_config->pch_pfit.enabled = true;
+		pipe_config->pch_pfit.pos = I915_READ(PF_WIN_POS(crtc->pipe));
+		pipe_config->pch_pfit.size = I915_READ(PF_WIN_SZ(crtc->pipe));
+
+		/* We currently do not free assignements of panel fitters on
+		 * ivb/hsw (since we don't use the higher upscaling modes which
+		 * differentiates them) so just WARN about this case for now. */
+		if (IS_GEN(dev_priv, 7)) {
+			WARN_ON((tmp & PF_PIPE_SEL_MASK_IVB) !=
+				PF_PIPE_SEL_IVB(crtc->pipe));
+		}
+	}
+}
+
+static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
+				     struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+	u32 tmp;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(crtc->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
+	pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
+	pipe_config->shared_dpll = NULL;
+
+	ret = false;
+	tmp = I915_READ(PIPECONF(crtc->pipe));
+	if (!(tmp & PIPECONF_ENABLE))
+		goto out;
+
+	switch (tmp & PIPECONF_BPC_MASK) {
+	case PIPECONF_6BPC:
+		pipe_config->pipe_bpp = 18;
+		break;
+	case PIPECONF_8BPC:
+		pipe_config->pipe_bpp = 24;
+		break;
+	case PIPECONF_10BPC:
+		pipe_config->pipe_bpp = 30;
+		break;
+	case PIPECONF_12BPC:
+		pipe_config->pipe_bpp = 36;
+		break;
+	default:
+		break;
+	}
+
+	if (tmp & PIPECONF_COLOR_RANGE_SELECT)
+		pipe_config->limited_color_range = true;
+
+	pipe_config->gamma_mode = (tmp & PIPECONF_GAMMA_MODE_MASK_ILK) >>
+		PIPECONF_GAMMA_MODE_SHIFT;
+
+	pipe_config->csc_mode = I915_READ(PIPE_CSC_MODE(crtc->pipe));
+
+	i9xx_get_pipe_color_config(pipe_config);
+	intel_color_get_config(pipe_config);
+
+	if (I915_READ(PCH_TRANSCONF(crtc->pipe)) & TRANS_ENABLE) {
+		struct intel_shared_dpll *pll;
+		enum intel_dpll_id pll_id;
+
+		pipe_config->has_pch_encoder = true;
+
+		tmp = I915_READ(FDI_RX_CTL(crtc->pipe));
+		pipe_config->fdi_lanes = ((FDI_DP_PORT_WIDTH_MASK & tmp) >>
+					  FDI_DP_PORT_WIDTH_SHIFT) + 1;
+
+		ironlake_get_fdi_m_n_config(crtc, pipe_config);
+
+		if (HAS_PCH_IBX(dev_priv)) {
+			/*
+			 * The pipe->pch transcoder and pch transcoder->pll
+			 * mapping is fixed.
+			 */
+			pll_id = (enum intel_dpll_id) crtc->pipe;
+		} else {
+			tmp = I915_READ(PCH_DPLL_SEL);
+			if (tmp & TRANS_DPLLB_SEL(crtc->pipe))
+				pll_id = DPLL_ID_PCH_PLL_B;
+			else
+				pll_id= DPLL_ID_PCH_PLL_A;
+		}
+
+		pipe_config->shared_dpll =
+			intel_get_shared_dpll_by_id(dev_priv, pll_id);
+		pll = pipe_config->shared_dpll;
+
+		WARN_ON(!pll->info->funcs->get_hw_state(dev_priv, pll,
+						&pipe_config->dpll_hw_state));
+
+		tmp = pipe_config->dpll_hw_state.dpll;
+		pipe_config->pixel_multiplier =
+			((tmp & PLL_REF_SDVO_HDMI_MULTIPLIER_MASK)
+			 >> PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT) + 1;
+
+		ironlake_pch_clock_get(crtc, pipe_config);
+	} else {
+		pipe_config->pixel_multiplier = 1;
+	}
+
+	intel_get_pipe_timings(crtc, pipe_config);
+	intel_get_pipe_src_size(crtc, pipe_config);
+
+	ironlake_get_pfit_config(crtc, pipe_config);
+
+	ret = true;
+
+out:
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+static int haswell_crtc_compute_clock(struct intel_crtc *crtc,
+				      struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_atomic_state *state =
+		to_intel_atomic_state(crtc_state->base.state);
+
+	if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
+	    INTEL_GEN(dev_priv) >= 11) {
+		struct intel_encoder *encoder =
+			intel_get_crtc_new_encoder(state, crtc_state);
+
+		if (!intel_get_shared_dpll(crtc_state, encoder)) {
+			DRM_DEBUG_KMS("failed to find PLL for pipe %c\n",
+				      pipe_name(crtc->pipe));
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static void cannonlake_get_ddi_pll(struct drm_i915_private *dev_priv,
+				   enum port port,
+				   struct intel_crtc_state *pipe_config)
+{
+	enum intel_dpll_id id;
+	u32 temp;
+
+	temp = I915_READ(DPCLKA_CFGCR0) & DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
+	id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
+
+	if (WARN_ON(id < SKL_DPLL0 || id > SKL_DPLL2))
+		return;
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
+}
+
+static void icelake_get_ddi_pll(struct drm_i915_private *dev_priv,
+				enum port port,
+				struct intel_crtc_state *pipe_config)
+{
+	enum intel_dpll_id id;
+	u32 temp;
+
+	/* TODO: TBT pll not implemented. */
+	if (intel_port_is_combophy(dev_priv, port)) {
+		temp = I915_READ(DPCLKA_CFGCR0_ICL) &
+		       DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
+		id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
+	} else if (intel_port_is_tc(dev_priv, port)) {
+		id = icl_tc_port_to_pll_id(intel_port_to_tc(dev_priv, port));
+	} else {
+		WARN(1, "Invalid port %x\n", port);
+		return;
+	}
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
+}
+
+static void bxt_get_ddi_pll(struct drm_i915_private *dev_priv,
+				enum port port,
+				struct intel_crtc_state *pipe_config)
+{
+	enum intel_dpll_id id;
+
+	switch (port) {
+	case PORT_A:
+		id = DPLL_ID_SKL_DPLL0;
+		break;
+	case PORT_B:
+		id = DPLL_ID_SKL_DPLL1;
+		break;
+	case PORT_C:
+		id = DPLL_ID_SKL_DPLL2;
+		break;
+	default:
+		DRM_ERROR("Incorrect port type\n");
+		return;
+	}
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
+}
+
+static void skylake_get_ddi_pll(struct drm_i915_private *dev_priv,
+				enum port port,
+				struct intel_crtc_state *pipe_config)
+{
+	enum intel_dpll_id id;
+	u32 temp;
+
+	temp = I915_READ(DPLL_CTRL2) & DPLL_CTRL2_DDI_CLK_SEL_MASK(port);
+	id = temp >> (port * 3 + 1);
+
+	if (WARN_ON(id < SKL_DPLL0 || id > SKL_DPLL3))
+		return;
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
+}
+
+static void haswell_get_ddi_pll(struct drm_i915_private *dev_priv,
+				enum port port,
+				struct intel_crtc_state *pipe_config)
+{
+	enum intel_dpll_id id;
+	u32 ddi_pll_sel = I915_READ(PORT_CLK_SEL(port));
+
+	switch (ddi_pll_sel) {
+	case PORT_CLK_SEL_WRPLL1:
+		id = DPLL_ID_WRPLL1;
+		break;
+	case PORT_CLK_SEL_WRPLL2:
+		id = DPLL_ID_WRPLL2;
+		break;
+	case PORT_CLK_SEL_SPLL:
+		id = DPLL_ID_SPLL;
+		break;
+	case PORT_CLK_SEL_LCPLL_810:
+		id = DPLL_ID_LCPLL_810;
+		break;
+	case PORT_CLK_SEL_LCPLL_1350:
+		id = DPLL_ID_LCPLL_1350;
+		break;
+	case PORT_CLK_SEL_LCPLL_2700:
+		id = DPLL_ID_LCPLL_2700;
+		break;
+	default:
+		MISSING_CASE(ddi_pll_sel);
+		/* fall through */
+	case PORT_CLK_SEL_NONE:
+		return;
+	}
+
+	pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
+}
+
+static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
+				     struct intel_crtc_state *pipe_config,
+				     u64 *power_domain_mask,
+				     intel_wakeref_t *wakerefs)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum intel_display_power_domain power_domain;
+	unsigned long panel_transcoder_mask = 0;
+	unsigned long enabled_panel_transcoders = 0;
+	enum transcoder panel_transcoder;
+	intel_wakeref_t wf;
+	u32 tmp;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		panel_transcoder_mask |=
+			BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1);
+
+	if (HAS_TRANSCODER_EDP(dev_priv))
+		panel_transcoder_mask |= BIT(TRANSCODER_EDP);
+
+	/*
+	 * The pipe->transcoder mapping is fixed with the exception of the eDP
+	 * and DSI transcoders handled below.
+	 */
+	pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
+
+	/*
+	 * XXX: Do intel_display_power_get_if_enabled before reading this (for
+	 * consistency and less surprising code; it's in always on power).
+	 */
+	for_each_set_bit(panel_transcoder,
+			 &panel_transcoder_mask,
+			 ARRAY_SIZE(INTEL_INFO(dev_priv)->trans_offsets)) {
+		bool force_thru = false;
+		enum pipe trans_pipe;
+
+		tmp = I915_READ(TRANS_DDI_FUNC_CTL(panel_transcoder));
+		if (!(tmp & TRANS_DDI_FUNC_ENABLE))
+			continue;
+
+		/*
+		 * Log all enabled ones, only use the first one.
+		 *
+		 * FIXME: This won't work for two separate DSI displays.
+		 */
+		enabled_panel_transcoders |= BIT(panel_transcoder);
+		if (enabled_panel_transcoders != BIT(panel_transcoder))
+			continue;
+
+		switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
+		default:
+			WARN(1, "unknown pipe linked to transcoder %s\n",
+			     transcoder_name(panel_transcoder));
+			/* fall through */
+		case TRANS_DDI_EDP_INPUT_A_ONOFF:
+			force_thru = true;
+			/* fall through */
+		case TRANS_DDI_EDP_INPUT_A_ON:
+			trans_pipe = PIPE_A;
+			break;
+		case TRANS_DDI_EDP_INPUT_B_ONOFF:
+			trans_pipe = PIPE_B;
+			break;
+		case TRANS_DDI_EDP_INPUT_C_ONOFF:
+			trans_pipe = PIPE_C;
+			break;
+		}
+
+		if (trans_pipe == crtc->pipe) {
+			pipe_config->cpu_transcoder = panel_transcoder;
+			pipe_config->pch_pfit.force_thru = force_thru;
+		}
+	}
+
+	/*
+	 * Valid combos: none, eDP, DSI0, DSI1, DSI0+DSI1
+	 */
+	WARN_ON((enabled_panel_transcoders & BIT(TRANSCODER_EDP)) &&
+		enabled_panel_transcoders != BIT(TRANSCODER_EDP));
+
+	power_domain = POWER_DOMAIN_TRANSCODER(pipe_config->cpu_transcoder);
+	WARN_ON(*power_domain_mask & BIT_ULL(power_domain));
+
+	wf = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wf)
+		return false;
+
+	wakerefs[power_domain] = wf;
+	*power_domain_mask |= BIT_ULL(power_domain);
+
+	tmp = I915_READ(PIPECONF(pipe_config->cpu_transcoder));
+
+	return tmp & PIPECONF_ENABLE;
+}
+
+static bool bxt_get_dsi_transcoder_state(struct intel_crtc *crtc,
+					 struct intel_crtc_state *pipe_config,
+					 u64 *power_domain_mask,
+					 intel_wakeref_t *wakerefs)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum intel_display_power_domain power_domain;
+	enum transcoder cpu_transcoder;
+	intel_wakeref_t wf;
+	enum port port;
+	u32 tmp;
+
+	for_each_port_masked(port, BIT(PORT_A) | BIT(PORT_C)) {
+		if (port == PORT_A)
+			cpu_transcoder = TRANSCODER_DSI_A;
+		else
+			cpu_transcoder = TRANSCODER_DSI_C;
+
+		power_domain = POWER_DOMAIN_TRANSCODER(cpu_transcoder);
+		WARN_ON(*power_domain_mask & BIT_ULL(power_domain));
+
+		wf = intel_display_power_get_if_enabled(dev_priv, power_domain);
+		if (!wf)
+			continue;
+
+		wakerefs[power_domain] = wf;
+		*power_domain_mask |= BIT_ULL(power_domain);
+
+		/*
+		 * The PLL needs to be enabled with a valid divider
+		 * configuration, otherwise accessing DSI registers will hang
+		 * the machine. See BSpec North Display Engine
+		 * registers/MIPI[BXT]. We can break out here early, since we
+		 * need the same DSI PLL to be enabled for both DSI ports.
+		 */
+		if (!bxt_dsi_pll_is_enabled(dev_priv))
+			break;
+
+		/* XXX: this works for video mode only */
+		tmp = I915_READ(BXT_MIPI_PORT_CTRL(port));
+		if (!(tmp & DPI_ENABLE))
+			continue;
+
+		tmp = I915_READ(MIPI_CTRL(port));
+		if ((tmp & BXT_PIPE_SELECT_MASK) != BXT_PIPE_SELECT(crtc->pipe))
+			continue;
+
+		pipe_config->cpu_transcoder = cpu_transcoder;
+		break;
+	}
+
+	return transcoder_is_dsi(pipe_config->cpu_transcoder);
+}
+
+static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
+				       struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll;
+	enum port port;
+	u32 tmp;
+
+	tmp = I915_READ(TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder));
+
+	port = (tmp & TRANS_DDI_PORT_MASK) >> TRANS_DDI_PORT_SHIFT;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		icelake_get_ddi_pll(dev_priv, port, pipe_config);
+	else if (IS_CANNONLAKE(dev_priv))
+		cannonlake_get_ddi_pll(dev_priv, port, pipe_config);
+	else if (IS_GEN9_BC(dev_priv))
+		skylake_get_ddi_pll(dev_priv, port, pipe_config);
+	else if (IS_GEN9_LP(dev_priv))
+		bxt_get_ddi_pll(dev_priv, port, pipe_config);
+	else
+		haswell_get_ddi_pll(dev_priv, port, pipe_config);
+
+	pll = pipe_config->shared_dpll;
+	if (pll) {
+		WARN_ON(!pll->info->funcs->get_hw_state(dev_priv, pll,
+						&pipe_config->dpll_hw_state));
+	}
+
+	/*
+	 * Haswell has only FDI/PCH transcoder A. It is which is connected to
+	 * DDI E. So just check whether this pipe is wired to DDI E and whether
+	 * the PCH transcoder is on.
+	 */
+	if (INTEL_GEN(dev_priv) < 9 &&
+	    (port == PORT_E) && I915_READ(LPT_TRANSCONF) & TRANS_ENABLE) {
+		pipe_config->has_pch_encoder = true;
+
+		tmp = I915_READ(FDI_RX_CTL(PIPE_A));
+		pipe_config->fdi_lanes = ((FDI_DP_PORT_WIDTH_MASK & tmp) >>
+					  FDI_DP_PORT_WIDTH_SHIFT) + 1;
+
+		ironlake_get_fdi_m_n_config(crtc, pipe_config);
+	}
+}
+
+static bool haswell_get_pipe_config(struct intel_crtc *crtc,
+				    struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	intel_wakeref_t wakerefs[POWER_DOMAIN_NUM], wf;
+	enum intel_display_power_domain power_domain;
+	u64 power_domain_mask;
+	bool active;
+
+	intel_crtc_init_scalers(crtc, pipe_config);
+
+	power_domain = POWER_DOMAIN_PIPE(crtc->pipe);
+	wf = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wf)
+		return false;
+
+	wakerefs[power_domain] = wf;
+	power_domain_mask = BIT_ULL(power_domain);
+
+	pipe_config->shared_dpll = NULL;
+
+	active = hsw_get_transcoder_state(crtc, pipe_config,
+					  &power_domain_mask, wakerefs);
+
+	if (IS_GEN9_LP(dev_priv) &&
+	    bxt_get_dsi_transcoder_state(crtc, pipe_config,
+					 &power_domain_mask, wakerefs)) {
+		WARN_ON(active);
+		active = true;
+	}
+
+	if (!active)
+		goto out;
+
+	if (!transcoder_is_dsi(pipe_config->cpu_transcoder) ||
+	    INTEL_GEN(dev_priv) >= 11) {
+		haswell_get_ddi_port_state(crtc, pipe_config);
+		intel_get_pipe_timings(crtc, pipe_config);
+	}
+
+	intel_get_pipe_src_size(crtc, pipe_config);
+	intel_get_crtc_ycbcr_config(crtc, pipe_config);
+
+	pipe_config->gamma_mode = I915_READ(GAMMA_MODE(crtc->pipe));
+
+	pipe_config->csc_mode = I915_READ(PIPE_CSC_MODE(crtc->pipe));
+
+	if (INTEL_GEN(dev_priv) >= 9) {
+		u32 tmp = I915_READ(SKL_BOTTOM_COLOR(crtc->pipe));
+
+		if (tmp & SKL_BOTTOM_COLOR_GAMMA_ENABLE)
+			pipe_config->gamma_enable = true;
+
+		if (tmp & SKL_BOTTOM_COLOR_CSC_ENABLE)
+			pipe_config->csc_enable = true;
+	} else {
+		i9xx_get_pipe_color_config(pipe_config);
+	}
+
+	intel_color_get_config(pipe_config);
+
+	power_domain = POWER_DOMAIN_PIPE_PANEL_FITTER(crtc->pipe);
+	WARN_ON(power_domain_mask & BIT_ULL(power_domain));
+
+	wf = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (wf) {
+		wakerefs[power_domain] = wf;
+		power_domain_mask |= BIT_ULL(power_domain);
+
+		if (INTEL_GEN(dev_priv) >= 9)
+			skylake_get_pfit_config(crtc, pipe_config);
+		else
+			ironlake_get_pfit_config(crtc, pipe_config);
+	}
+
+	if (hsw_crtc_supports_ips(crtc)) {
+		if (IS_HASWELL(dev_priv))
+			pipe_config->ips_enabled = I915_READ(IPS_CTL) & IPS_ENABLE;
+		else {
+			/*
+			 * We cannot readout IPS state on broadwell, set to
+			 * true so we can set it to a defined state on first
+			 * commit.
+			 */
+			pipe_config->ips_enabled = true;
+		}
+	}
+
+	if (pipe_config->cpu_transcoder != TRANSCODER_EDP &&
+	    !transcoder_is_dsi(pipe_config->cpu_transcoder)) {
+		pipe_config->pixel_multiplier =
+			I915_READ(PIPE_MULT(pipe_config->cpu_transcoder)) + 1;
+	} else {
+		pipe_config->pixel_multiplier = 1;
+	}
+
+out:
+	for_each_power_domain(power_domain, power_domain_mask)
+		intel_display_power_put(dev_priv,
+					power_domain, wakerefs[power_domain]);
+
+	return active;
+}
+
+static u32 intel_cursor_base(const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	const struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	u32 base;
+
+	if (INTEL_INFO(dev_priv)->display.cursor_needs_physical)
+		base = obj->phys_handle->busaddr;
+	else
+		base = intel_plane_ggtt_offset(plane_state);
+
+	base += plane_state->color_plane[0].offset;
+
+	/* ILK+ do this automagically */
+	if (HAS_GMCH(dev_priv) &&
+	    plane_state->base.rotation & DRM_MODE_ROTATE_180)
+		base += (plane_state->base.crtc_h *
+			 plane_state->base.crtc_w - 1) * fb->format->cpp[0];
+
+	return base;
+}
+
+static u32 intel_cursor_position(const struct intel_plane_state *plane_state)
+{
+	int x = plane_state->base.crtc_x;
+	int y = plane_state->base.crtc_y;
+	u32 pos = 0;
+
+	if (x < 0) {
+		pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
+		x = -x;
+	}
+	pos |= x << CURSOR_X_SHIFT;
+
+	if (y < 0) {
+		pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
+		y = -y;
+	}
+	pos |= y << CURSOR_Y_SHIFT;
+
+	return pos;
+}
+
+static bool intel_cursor_size_ok(const struct intel_plane_state *plane_state)
+{
+	const struct drm_mode_config *config =
+		&plane_state->base.plane->dev->mode_config;
+	int width = plane_state->base.crtc_w;
+	int height = plane_state->base.crtc_h;
+
+	return width > 0 && width <= config->cursor_width &&
+		height > 0 && height <= config->cursor_height;
+}
+
+static int intel_cursor_check_surface(struct intel_plane_state *plane_state)
+{
+	int src_x, src_y;
+	u32 offset;
+	int ret;
+
+	ret = intel_plane_compute_gtt(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	src_x = plane_state->base.src_x >> 16;
+	src_y = plane_state->base.src_y >> 16;
+
+	intel_add_fb_offsets(&src_x, &src_y, plane_state, 0);
+	offset = intel_plane_compute_aligned_offset(&src_x, &src_y,
+						    plane_state, 0);
+
+	if (src_x != 0 || src_y != 0) {
+		DRM_DEBUG_KMS("Arbitrary cursor panning not supported\n");
+		return -EINVAL;
+	}
+
+	plane_state->color_plane[0].offset = offset;
+
+	return 0;
+}
+
+static int intel_check_cursor(struct intel_crtc_state *crtc_state,
+			      struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int ret;
+
+	if (fb && fb->modifier != DRM_FORMAT_MOD_LINEAR) {
+		DRM_DEBUG_KMS("cursor cannot be tiled\n");
+		return -EINVAL;
+	}
+
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
+						  &crtc_state->base,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  true, true);
+	if (ret)
+		return ret;
+
+	ret = intel_cursor_check_surface(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static unsigned int
+i845_cursor_max_stride(struct intel_plane *plane,
+		       u32 pixel_format, u64 modifier,
+		       unsigned int rotation)
+{
+	return 2048;
+}
+
+static u32 i845_cursor_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	u32 cntl = 0;
+
+	if (crtc_state->gamma_enable)
+		cntl |= CURSOR_GAMMA_ENABLE;
+
+	return cntl;
+}
+
+static u32 i845_cursor_ctl(const struct intel_crtc_state *crtc_state,
+			   const struct intel_plane_state *plane_state)
+{
+	return CURSOR_ENABLE |
+		CURSOR_FORMAT_ARGB |
+		CURSOR_STRIDE(plane_state->color_plane[0].stride);
+}
+
+static bool i845_cursor_size_ok(const struct intel_plane_state *plane_state)
+{
+	int width = plane_state->base.crtc_w;
+
+	/*
+	 * 845g/865g are only limited by the width of their cursors,
+	 * the height is arbitrary up to the precision of the register.
+	 */
+	return intel_cursor_size_ok(plane_state) && IS_ALIGNED(width, 64);
+}
+
+static int i845_check_cursor(struct intel_crtc_state *crtc_state,
+			     struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int ret;
+
+	ret = intel_check_cursor(crtc_state, plane_state);
+	if (ret)
+		return ret;
+
+	/* if we want to turn off the cursor ignore width and height */
+	if (!fb)
+		return 0;
+
+	/* Check for which cursor types we support */
+	if (!i845_cursor_size_ok(plane_state)) {
+		DRM_DEBUG("Cursor dimension %dx%d not supported\n",
+			  plane_state->base.crtc_w,
+			  plane_state->base.crtc_h);
+		return -EINVAL;
+	}
+
+	WARN_ON(plane_state->base.visible &&
+		plane_state->color_plane[0].stride != fb->pitches[0]);
+
+	switch (fb->pitches[0]) {
+	case 256:
+	case 512:
+	case 1024:
+	case 2048:
+		break;
+	default:
+		DRM_DEBUG_KMS("Invalid cursor stride (%u)\n",
+			      fb->pitches[0]);
+		return -EINVAL;
+	}
+
+	plane_state->ctl = i845_cursor_ctl(crtc_state, plane_state);
+
+	return 0;
+}
+
+static void i845_update_cursor(struct intel_plane *plane,
+			       const struct intel_crtc_state *crtc_state,
+			       const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	u32 cntl = 0, base = 0, pos = 0, size = 0;
+	unsigned long irqflags;
+
+	if (plane_state && plane_state->base.visible) {
+		unsigned int width = plane_state->base.crtc_w;
+		unsigned int height = plane_state->base.crtc_h;
+
+		cntl = plane_state->ctl |
+			i845_cursor_ctl_crtc(crtc_state);
+
+		size = (height << 12) | width;
+
+		base = intel_cursor_base(plane_state);
+		pos = intel_cursor_position(plane_state);
+	}
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	/* On these chipsets we can only modify the base/size/stride
+	 * whilst the cursor is disabled.
+	 */
+	if (plane->cursor.base != base ||
+	    plane->cursor.size != size ||
+	    plane->cursor.cntl != cntl) {
+		I915_WRITE_FW(CURCNTR(PIPE_A), 0);
+		I915_WRITE_FW(CURBASE(PIPE_A), base);
+		I915_WRITE_FW(CURSIZE, size);
+		I915_WRITE_FW(CURPOS(PIPE_A), pos);
+		I915_WRITE_FW(CURCNTR(PIPE_A), cntl);
+
+		plane->cursor.base = base;
+		plane->cursor.size = size;
+		plane->cursor.cntl = cntl;
+	} else {
+		I915_WRITE_FW(CURPOS(PIPE_A), pos);
+	}
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void i845_disable_cursor(struct intel_plane *plane,
+				const struct intel_crtc_state *crtc_state)
+{
+	i845_update_cursor(plane, crtc_state, NULL);
+}
+
+static bool i845_cursor_get_hw_state(struct intel_plane *plane,
+				     enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(PIPE_A);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	ret = I915_READ(CURCNTR(PIPE_A)) & CURSOR_ENABLE;
+
+	*pipe = PIPE_A;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static unsigned int
+i9xx_cursor_max_stride(struct intel_plane *plane,
+		       u32 pixel_format, u64 modifier,
+		       unsigned int rotation)
+{
+	return plane->base.dev->mode_config.cursor_width * 4;
+}
+
+static u32 i9xx_cursor_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 cntl = 0;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		return cntl;
+
+	if (crtc_state->gamma_enable)
+		cntl = MCURSOR_GAMMA_ENABLE;
+
+	if (crtc_state->csc_enable)
+		cntl |= MCURSOR_PIPE_CSC_ENABLE;
+
+	if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv))
+		cntl |= MCURSOR_PIPE_SELECT(crtc->pipe);
+
+	return cntl;
+}
+
+static u32 i9xx_cursor_ctl(const struct intel_crtc_state *crtc_state,
+			   const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	u32 cntl = 0;
+
+	if (IS_GEN(dev_priv, 6) || IS_IVYBRIDGE(dev_priv))
+		cntl |= MCURSOR_TRICKLE_FEED_DISABLE;
+
+	switch (plane_state->base.crtc_w) {
+	case 64:
+		cntl |= MCURSOR_MODE_64_ARGB_AX;
+		break;
+	case 128:
+		cntl |= MCURSOR_MODE_128_ARGB_AX;
+		break;
+	case 256:
+		cntl |= MCURSOR_MODE_256_ARGB_AX;
+		break;
+	default:
+		MISSING_CASE(plane_state->base.crtc_w);
+		return 0;
+	}
+
+	if (plane_state->base.rotation & DRM_MODE_ROTATE_180)
+		cntl |= MCURSOR_ROTATE_180;
+
+	return cntl;
+}
+
+static bool i9xx_cursor_size_ok(const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	int width = plane_state->base.crtc_w;
+	int height = plane_state->base.crtc_h;
+
+	if (!intel_cursor_size_ok(plane_state))
+		return false;
+
+	/* Cursor width is limited to a few power-of-two sizes */
+	switch (width) {
+	case 256:
+	case 128:
+	case 64:
+		break;
+	default:
+		return false;
+	}
+
+	/*
+	 * IVB+ have CUR_FBC_CTL which allows an arbitrary cursor
+	 * height from 8 lines up to the cursor width, when the
+	 * cursor is not rotated. Everything else requires square
+	 * cursors.
+	 */
+	if (HAS_CUR_FBC(dev_priv) &&
+	    plane_state->base.rotation & DRM_MODE_ROTATE_0) {
+		if (height < 8 || height > width)
+			return false;
+	} else {
+		if (height != width)
+			return false;
+	}
+
+	return true;
+}
+
+static int i9xx_check_cursor(struct intel_crtc_state *crtc_state,
+			     struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	enum pipe pipe = plane->pipe;
+	int ret;
+
+	ret = intel_check_cursor(crtc_state, plane_state);
+	if (ret)
+		return ret;
+
+	/* if we want to turn off the cursor ignore width and height */
+	if (!fb)
+		return 0;
+
+	/* Check for which cursor types we support */
+	if (!i9xx_cursor_size_ok(plane_state)) {
+		DRM_DEBUG("Cursor dimension %dx%d not supported\n",
+			  plane_state->base.crtc_w,
+			  plane_state->base.crtc_h);
+		return -EINVAL;
+	}
+
+	WARN_ON(plane_state->base.visible &&
+		plane_state->color_plane[0].stride != fb->pitches[0]);
+
+	if (fb->pitches[0] != plane_state->base.crtc_w * fb->format->cpp[0]) {
+		DRM_DEBUG_KMS("Invalid cursor stride (%u) (cursor width %d)\n",
+			      fb->pitches[0], plane_state->base.crtc_w);
+		return -EINVAL;
+	}
+
+	/*
+	 * There's something wrong with the cursor on CHV pipe C.
+	 * If it straddles the left edge of the screen then
+	 * moving it away from the edge or disabling it often
+	 * results in a pipe underrun, and often that can lead to
+	 * dead pipe (constant underrun reported, and it scans
+	 * out just a solid color). To recover from that, the
+	 * display power well must be turned off and on again.
+	 * Refuse the put the cursor into that compromised position.
+	 */
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_C &&
+	    plane_state->base.visible && plane_state->base.crtc_x < 0) {
+		DRM_DEBUG_KMS("CHV cursor C not allowed to straddle the left screen edge\n");
+		return -EINVAL;
+	}
+
+	plane_state->ctl = i9xx_cursor_ctl(crtc_state, plane_state);
+
+	return 0;
+}
+
+static void i9xx_update_cursor(struct intel_plane *plane,
+			       const struct intel_crtc_state *crtc_state,
+			       const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	u32 cntl = 0, base = 0, pos = 0, fbc_ctl = 0;
+	unsigned long irqflags;
+
+	if (plane_state && plane_state->base.visible) {
+		cntl = plane_state->ctl |
+			i9xx_cursor_ctl_crtc(crtc_state);
+
+		if (plane_state->base.crtc_h != plane_state->base.crtc_w)
+			fbc_ctl = CUR_FBC_CTL_EN | (plane_state->base.crtc_h - 1);
+
+		base = intel_cursor_base(plane_state);
+		pos = intel_cursor_position(plane_state);
+	}
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	/*
+	 * On some platforms writing CURCNTR first will also
+	 * cause CURPOS to be armed by the CURBASE write.
+	 * Without the CURCNTR write the CURPOS write would
+	 * arm itself. Thus we always update CURCNTR before
+	 * CURPOS.
+	 *
+	 * On other platforms CURPOS always requires the
+	 * CURBASE write to arm the update. Additonally
+	 * a write to any of the cursor register will cancel
+	 * an already armed cursor update. Thus leaving out
+	 * the CURBASE write after CURPOS could lead to a
+	 * cursor that doesn't appear to move, or even change
+	 * shape. Thus we always write CURBASE.
+	 *
+	 * The other registers are armed by by the CURBASE write
+	 * except when the plane is getting enabled at which time
+	 * the CURCNTR write arms the update.
+	 */
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		skl_write_cursor_wm(plane, crtc_state);
+
+	if (plane->cursor.base != base ||
+	    plane->cursor.size != fbc_ctl ||
+	    plane->cursor.cntl != cntl) {
+		if (HAS_CUR_FBC(dev_priv))
+			I915_WRITE_FW(CUR_FBC_CTL(pipe), fbc_ctl);
+		I915_WRITE_FW(CURCNTR(pipe), cntl);
+		I915_WRITE_FW(CURPOS(pipe), pos);
+		I915_WRITE_FW(CURBASE(pipe), base);
+
+		plane->cursor.base = base;
+		plane->cursor.size = fbc_ctl;
+		plane->cursor.cntl = cntl;
+	} else {
+		I915_WRITE_FW(CURPOS(pipe), pos);
+		I915_WRITE_FW(CURBASE(pipe), base);
+	}
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void i9xx_disable_cursor(struct intel_plane *plane,
+				const struct intel_crtc_state *crtc_state)
+{
+	i9xx_update_cursor(plane, crtc_state, NULL);
+}
+
+static bool i9xx_cursor_get_hw_state(struct intel_plane *plane,
+				     enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+	bool ret;
+	u32 val;
+
+	/*
+	 * Not 100% correct for planes that can move between pipes,
+	 * but that's only the case for gen2-3 which don't have any
+	 * display power wells.
+	 */
+	power_domain = POWER_DOMAIN_PIPE(plane->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(CURCNTR(plane->pipe));
+
+	ret = val & MCURSOR_MODE;
+
+	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
+		*pipe = plane->pipe;
+	else
+		*pipe = (val & MCURSOR_PIPE_SELECT_MASK) >>
+			MCURSOR_PIPE_SELECT_SHIFT;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+/* VESA 640x480x72Hz mode to set on the pipe */
+static const struct drm_display_mode load_detect_mode = {
+	DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
+		 704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
+};
+
+struct drm_framebuffer *
+intel_framebuffer_create(struct drm_i915_gem_object *obj,
+			 struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct intel_framebuffer *intel_fb;
+	int ret;
+
+	intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
+	if (!intel_fb)
+		return ERR_PTR(-ENOMEM);
+
+	ret = intel_framebuffer_init(intel_fb, obj, mode_cmd);
+	if (ret)
+		goto err;
+
+	return &intel_fb->base;
+
+err:
+	kfree(intel_fb);
+	return ERR_PTR(ret);
+}
+
+static int intel_modeset_disable_planes(struct drm_atomic_state *state,
+					struct drm_crtc *crtc)
+{
+	struct drm_plane *plane;
+	struct drm_plane_state *plane_state;
+	int ret, i;
+
+	ret = drm_atomic_add_affected_planes(state, crtc);
+	if (ret)
+		return ret;
+
+	for_each_new_plane_in_state(state, plane, plane_state, i) {
+		if (plane_state->crtc != crtc)
+			continue;
+
+		ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
+		if (ret)
+			return ret;
+
+		drm_atomic_set_fb_for_plane(plane_state, NULL);
+	}
+
+	return 0;
+}
+
+int intel_get_load_detect_pipe(struct drm_connector *connector,
+			       const struct drm_display_mode *mode,
+			       struct intel_load_detect_pipe *old,
+			       struct drm_modeset_acquire_ctx *ctx)
+{
+	struct intel_crtc *intel_crtc;
+	struct intel_encoder *intel_encoder =
+		intel_attached_encoder(connector);
+	struct drm_crtc *possible_crtc;
+	struct drm_encoder *encoder = &intel_encoder->base;
+	struct drm_crtc *crtc = NULL;
+	struct drm_device *dev = encoder->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_atomic_state *state = NULL, *restore_state = NULL;
+	struct drm_connector_state *connector_state;
+	struct intel_crtc_state *crtc_state;
+	int ret, i = -1;
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
+		      connector->base.id, connector->name,
+		      encoder->base.id, encoder->name);
+
+	old->restore_state = NULL;
+
+	WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
+
+	/*
+	 * Algorithm gets a little messy:
+	 *
+	 *   - if the connector already has an assigned crtc, use it (but make
+	 *     sure it's on first)
+	 *
+	 *   - try to find the first unused crtc that can drive this connector,
+	 *     and use that if we find one
+	 */
+
+	/* See if we already have a CRTC for this connector */
+	if (connector->state->crtc) {
+		crtc = connector->state->crtc;
+
+		ret = drm_modeset_lock(&crtc->mutex, ctx);
+		if (ret)
+			goto fail;
+
+		/* Make sure the crtc and connector are running */
+		goto found;
+	}
+
+	/* Find an unused one (if possible) */
+	for_each_crtc(dev, possible_crtc) {
+		i++;
+		if (!(encoder->possible_crtcs & (1 << i)))
+			continue;
+
+		ret = drm_modeset_lock(&possible_crtc->mutex, ctx);
+		if (ret)
+			goto fail;
+
+		if (possible_crtc->state->enable) {
+			drm_modeset_unlock(&possible_crtc->mutex);
+			continue;
+		}
+
+		crtc = possible_crtc;
+		break;
+	}
+
+	/*
+	 * If we didn't find an unused CRTC, don't use any.
+	 */
+	if (!crtc) {
+		DRM_DEBUG_KMS("no pipe available for load-detect\n");
+		ret = -ENODEV;
+		goto fail;
+	}
+
+found:
+	intel_crtc = to_intel_crtc(crtc);
+
+	state = drm_atomic_state_alloc(dev);
+	restore_state = drm_atomic_state_alloc(dev);
+	if (!state || !restore_state) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	state->acquire_ctx = ctx;
+	restore_state->acquire_ctx = ctx;
+
+	connector_state = drm_atomic_get_connector_state(state, connector);
+	if (IS_ERR(connector_state)) {
+		ret = PTR_ERR(connector_state);
+		goto fail;
+	}
+
+	ret = drm_atomic_set_crtc_for_connector(connector_state, crtc);
+	if (ret)
+		goto fail;
+
+	crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
+	if (IS_ERR(crtc_state)) {
+		ret = PTR_ERR(crtc_state);
+		goto fail;
+	}
+
+	crtc_state->base.active = crtc_state->base.enable = true;
+
+	if (!mode)
+		mode = &load_detect_mode;
+
+	ret = drm_atomic_set_mode_for_crtc(&crtc_state->base, mode);
+	if (ret)
+		goto fail;
+
+	ret = intel_modeset_disable_planes(state, crtc);
+	if (ret)
+		goto fail;
+
+	ret = PTR_ERR_OR_ZERO(drm_atomic_get_connector_state(restore_state, connector));
+	if (!ret)
+		ret = PTR_ERR_OR_ZERO(drm_atomic_get_crtc_state(restore_state, crtc));
+	if (!ret)
+		ret = drm_atomic_add_affected_planes(restore_state, crtc);
+	if (ret) {
+		DRM_DEBUG_KMS("Failed to create a copy of old state to restore: %i\n", ret);
+		goto fail;
+	}
+
+	ret = drm_atomic_commit(state);
+	if (ret) {
+		DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
+		goto fail;
+	}
+
+	old->restore_state = restore_state;
+	drm_atomic_state_put(state);
+
+	/* let the connector get through one full cycle before testing */
+	intel_wait_for_vblank(dev_priv, intel_crtc->pipe);
+	return true;
+
+fail:
+	if (state) {
+		drm_atomic_state_put(state);
+		state = NULL;
+	}
+	if (restore_state) {
+		drm_atomic_state_put(restore_state);
+		restore_state = NULL;
+	}
+
+	if (ret == -EDEADLK)
+		return ret;
+
+	return false;
+}
+
+void intel_release_load_detect_pipe(struct drm_connector *connector,
+				    struct intel_load_detect_pipe *old,
+				    struct drm_modeset_acquire_ctx *ctx)
+{
+	struct intel_encoder *intel_encoder =
+		intel_attached_encoder(connector);
+	struct drm_encoder *encoder = &intel_encoder->base;
+	struct drm_atomic_state *state = old->restore_state;
+	int ret;
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
+		      connector->base.id, connector->name,
+		      encoder->base.id, encoder->name);
+
+	if (!state)
+		return;
+
+	ret = drm_atomic_helper_commit_duplicated_state(state, ctx);
+	if (ret)
+		DRM_DEBUG_KMS("Couldn't release load detect pipe: %i\n", ret);
+	drm_atomic_state_put(state);
+}
+
+static int i9xx_pll_refclk(struct drm_device *dev,
+			   const struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 dpll = pipe_config->dpll_hw_state.dpll;
+
+	if ((dpll & PLL_REF_INPUT_MASK) == PLLB_REF_INPUT_SPREADSPECTRUMIN)
+		return dev_priv->vbt.lvds_ssc_freq;
+	else if (HAS_PCH_SPLIT(dev_priv))
+		return 120000;
+	else if (!IS_GEN(dev_priv, 2))
+		return 96000;
+	else
+		return 48000;
+}
+
+/* Returns the clock of the currently programmed mode of the given pipe. */
+static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
+				struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int pipe = pipe_config->cpu_transcoder;
+	u32 dpll = pipe_config->dpll_hw_state.dpll;
+	u32 fp;
+	struct dpll clock;
+	int port_clock;
+	int refclk = i9xx_pll_refclk(dev, pipe_config);
+
+	if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
+		fp = pipe_config->dpll_hw_state.fp0;
+	else
+		fp = pipe_config->dpll_hw_state.fp1;
+
+	clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
+	if (IS_PINEVIEW(dev_priv)) {
+		clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
+		clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
+	} else {
+		clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
+		clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
+	}
+
+	if (!IS_GEN(dev_priv, 2)) {
+		if (IS_PINEVIEW(dev_priv))
+			clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
+				DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
+		else
+			clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
+			       DPLL_FPA01_P1_POST_DIV_SHIFT);
+
+		switch (dpll & DPLL_MODE_MASK) {
+		case DPLLB_MODE_DAC_SERIAL:
+			clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
+				5 : 10;
+			break;
+		case DPLLB_MODE_LVDS:
+			clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
+				7 : 14;
+			break;
+		default:
+			DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
+				  "mode\n", (int)(dpll & DPLL_MODE_MASK));
+			return;
+		}
+
+		if (IS_PINEVIEW(dev_priv))
+			port_clock = pnv_calc_dpll_params(refclk, &clock);
+		else
+			port_clock = i9xx_calc_dpll_params(refclk, &clock);
+	} else {
+		u32 lvds = IS_I830(dev_priv) ? 0 : I915_READ(LVDS);
+		bool is_lvds = (pipe == 1) && (lvds & LVDS_PORT_EN);
+
+		if (is_lvds) {
+			clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
+				       DPLL_FPA01_P1_POST_DIV_SHIFT);
+
+			if (lvds & LVDS_CLKB_POWER_UP)
+				clock.p2 = 7;
+			else
+				clock.p2 = 14;
+		} else {
+			if (dpll & PLL_P1_DIVIDE_BY_TWO)
+				clock.p1 = 2;
+			else {
+				clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
+					    DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
+			}
+			if (dpll & PLL_P2_DIVIDE_BY_4)
+				clock.p2 = 4;
+			else
+				clock.p2 = 2;
+		}
+
+		port_clock = i9xx_calc_dpll_params(refclk, &clock);
+	}
+
+	/*
+	 * This value includes pixel_multiplier. We will use
+	 * port_clock to compute adjusted_mode.crtc_clock in the
+	 * encoder's get_config() function.
+	 */
+	pipe_config->port_clock = port_clock;
+}
+
+int intel_dotclock_calculate(int link_freq,
+			     const struct intel_link_m_n *m_n)
+{
+	/*
+	 * The calculation for the data clock is:
+	 * pixel_clock = ((m/n)*(link_clock * nr_lanes))/bpp
+	 * But we want to avoid losing precison if possible, so:
+	 * pixel_clock = ((m * link_clock * nr_lanes)/(n*bpp))
+	 *
+	 * and the link clock is simpler:
+	 * link_clock = (m * link_clock) / n
+	 */
+
+	if (!m_n->link_n)
+		return 0;
+
+	return div_u64(mul_u32_u32(m_n->link_m, link_freq), m_n->link_n);
+}
+
+static void ironlake_pch_clock_get(struct intel_crtc *crtc,
+				   struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	/* read out port_clock from the DPLL */
+	i9xx_crtc_clock_get(crtc, pipe_config);
+
+	/*
+	 * In case there is an active pipe without active ports,
+	 * we may need some idea for the dotclock anyway.
+	 * Calculate one based on the FDI configuration.
+	 */
+	pipe_config->base.adjusted_mode.crtc_clock =
+		intel_dotclock_calculate(intel_fdi_link_freq(dev_priv, pipe_config),
+					 &pipe_config->fdi_m_n);
+}
+
+/* Returns the currently programmed mode of the given encoder. */
+struct drm_display_mode *
+intel_encoder_current_mode(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc_state *crtc_state;
+	struct drm_display_mode *mode;
+	struct intel_crtc *crtc;
+	enum pipe pipe;
+
+	if (!encoder->get_hw_state(encoder, &pipe))
+		return NULL;
+
+	crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+
+	mode = kzalloc(sizeof(*mode), GFP_KERNEL);
+	if (!mode)
+		return NULL;
+
+	crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);
+	if (!crtc_state) {
+		kfree(mode);
+		return NULL;
+	}
+
+	crtc_state->base.crtc = &crtc->base;
+
+	if (!dev_priv->display.get_pipe_config(crtc, crtc_state)) {
+		kfree(crtc_state);
+		kfree(mode);
+		return NULL;
+	}
+
+	encoder->get_config(encoder, crtc_state);
+
+	intel_mode_from_pipe_config(mode, crtc_state);
+
+	kfree(crtc_state);
+
+	return mode;
+}
+
+static void intel_crtc_destroy(struct drm_crtc *crtc)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	drm_crtc_cleanup(crtc);
+	kfree(intel_crtc);
+}
+
+/**
+ * intel_wm_need_update - Check whether watermarks need updating
+ * @cur: current plane state
+ * @new: new plane state
+ *
+ * Check current plane state versus the new one to determine whether
+ * watermarks need to be recalculated.
+ *
+ * Returns true or false.
+ */
+static bool intel_wm_need_update(struct intel_plane_state *cur,
+				 struct intel_plane_state *new)
+{
+	/* Update watermarks on tiling or size changes. */
+	if (new->base.visible != cur->base.visible)
+		return true;
+
+	if (!cur->base.fb || !new->base.fb)
+		return false;
+
+	if (cur->base.fb->modifier != new->base.fb->modifier ||
+	    cur->base.rotation != new->base.rotation ||
+	    drm_rect_width(&new->base.src) != drm_rect_width(&cur->base.src) ||
+	    drm_rect_height(&new->base.src) != drm_rect_height(&cur->base.src) ||
+	    drm_rect_width(&new->base.dst) != drm_rect_width(&cur->base.dst) ||
+	    drm_rect_height(&new->base.dst) != drm_rect_height(&cur->base.dst))
+		return true;
+
+	return false;
+}
+
+static bool needs_scaling(const struct intel_plane_state *state)
+{
+	int src_w = drm_rect_width(&state->base.src) >> 16;
+	int src_h = drm_rect_height(&state->base.src) >> 16;
+	int dst_w = drm_rect_width(&state->base.dst);
+	int dst_h = drm_rect_height(&state->base.dst);
+
+	return (src_w != dst_w || src_h != dst_h);
+}
+
+int intel_plane_atomic_calc_changes(const struct intel_crtc_state *old_crtc_state,
+				    struct drm_crtc_state *crtc_state,
+				    const struct intel_plane_state *old_plane_state,
+				    struct drm_plane_state *plane_state)
+{
+	struct intel_crtc_state *pipe_config = to_intel_crtc_state(crtc_state);
+	struct drm_crtc *crtc = crtc_state->crtc;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_plane *plane = to_intel_plane(plane_state->plane);
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	bool mode_changed = needs_modeset(crtc_state);
+	bool was_crtc_enabled = old_crtc_state->base.active;
+	bool is_crtc_enabled = crtc_state->active;
+	bool turn_off, turn_on, visible, was_visible;
+	struct drm_framebuffer *fb = plane_state->fb;
+	int ret;
+
+	if (INTEL_GEN(dev_priv) >= 9 && plane->id != PLANE_CURSOR) {
+		ret = skl_update_scaler_plane(
+			to_intel_crtc_state(crtc_state),
+			to_intel_plane_state(plane_state));
+		if (ret)
+			return ret;
+	}
+
+	was_visible = old_plane_state->base.visible;
+	visible = plane_state->visible;
+
+	if (!was_crtc_enabled && WARN_ON(was_visible))
+		was_visible = false;
+
+	/*
+	 * Visibility is calculated as if the crtc was on, but
+	 * after scaler setup everything depends on it being off
+	 * when the crtc isn't active.
+	 *
+	 * FIXME this is wrong for watermarks. Watermarks should also
+	 * be computed as if the pipe would be active. Perhaps move
+	 * per-plane wm computation to the .check_plane() hook, and
+	 * only combine the results from all planes in the current place?
+	 */
+	if (!is_crtc_enabled) {
+		plane_state->visible = visible = false;
+		to_intel_crtc_state(crtc_state)->active_planes &= ~BIT(plane->id);
+		to_intel_crtc_state(crtc_state)->data_rate[plane->id] = 0;
+	}
+
+	if (!was_visible && !visible)
+		return 0;
+
+	if (fb != old_plane_state->base.fb)
+		pipe_config->fb_changed = true;
+
+	turn_off = was_visible && (!visible || mode_changed);
+	turn_on = visible && (!was_visible || mode_changed);
+
+	DRM_DEBUG_ATOMIC("[CRTC:%d:%s] has [PLANE:%d:%s] with fb %i\n",
+			 intel_crtc->base.base.id, intel_crtc->base.name,
+			 plane->base.base.id, plane->base.name,
+			 fb ? fb->base.id : -1);
+
+	DRM_DEBUG_ATOMIC("[PLANE:%d:%s] visible %i -> %i, off %i, on %i, ms %i\n",
+			 plane->base.base.id, plane->base.name,
+			 was_visible, visible,
+			 turn_off, turn_on, mode_changed);
+
+	if (turn_on) {
+		if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv))
+			pipe_config->update_wm_pre = true;
+
+		/* must disable cxsr around plane enable/disable */
+		if (plane->id != PLANE_CURSOR)
+			pipe_config->disable_cxsr = true;
+	} else if (turn_off) {
+		if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv))
+			pipe_config->update_wm_post = true;
+
+		/* must disable cxsr around plane enable/disable */
+		if (plane->id != PLANE_CURSOR)
+			pipe_config->disable_cxsr = true;
+	} else if (intel_wm_need_update(to_intel_plane_state(plane->base.state),
+					to_intel_plane_state(plane_state))) {
+		if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv)) {
+			/* FIXME bollocks */
+			pipe_config->update_wm_pre = true;
+			pipe_config->update_wm_post = true;
+		}
+	}
+
+	if (visible || was_visible)
+		pipe_config->fb_bits |= plane->frontbuffer_bit;
+
+	/*
+	 * ILK/SNB DVSACNTR/Sprite Enable
+	 * IVB SPR_CTL/Sprite Enable
+	 * "When in Self Refresh Big FIFO mode, a write to enable the
+	 *  plane will be internally buffered and delayed while Big FIFO
+	 *  mode is exiting."
+	 *
+	 * Which means that enabling the sprite can take an extra frame
+	 * when we start in big FIFO mode (LP1+). Thus we need to drop
+	 * down to LP0 and wait for vblank in order to make sure the
+	 * sprite gets enabled on the next vblank after the register write.
+	 * Doing otherwise would risk enabling the sprite one frame after
+	 * we've already signalled flip completion. We can resume LP1+
+	 * once the sprite has been enabled.
+	 *
+	 *
+	 * WaCxSRDisabledForSpriteScaling:ivb
+	 * IVB SPR_SCALE/Scaling Enable
+	 * "Low Power watermarks must be disabled for at least one
+	 *  frame before enabling sprite scaling, and kept disabled
+	 *  until sprite scaling is disabled."
+	 *
+	 * ILK/SNB DVSASCALE/Scaling Enable
+	 * "When in Self Refresh Big FIFO mode, scaling enable will be
+	 *  masked off while Big FIFO mode is exiting."
+	 *
+	 * Despite the w/a only being listed for IVB we assume that
+	 * the ILK/SNB note has similar ramifications, hence we apply
+	 * the w/a on all three platforms.
+	 *
+	 * With experimental results seems this is needed also for primary
+	 * plane, not only sprite plane.
+	 */
+	if (plane->id != PLANE_CURSOR &&
+	    (IS_GEN_RANGE(dev_priv, 5, 6) ||
+	     IS_IVYBRIDGE(dev_priv)) &&
+	    (turn_on || (!needs_scaling(old_plane_state) &&
+			 needs_scaling(to_intel_plane_state(plane_state)))))
+		pipe_config->disable_lp_wm = true;
+
+	return 0;
+}
+
+static bool encoders_cloneable(const struct intel_encoder *a,
+			       const struct intel_encoder *b)
+{
+	/* masks could be asymmetric, so check both ways */
+	return a == b || (a->cloneable & (1 << b->type) &&
+			  b->cloneable & (1 << a->type));
+}
+
+static bool check_single_encoder_cloning(struct drm_atomic_state *state,
+					 struct intel_crtc *crtc,
+					 struct intel_encoder *encoder)
+{
+	struct intel_encoder *source_encoder;
+	struct drm_connector *connector;
+	struct drm_connector_state *connector_state;
+	int i;
+
+	for_each_new_connector_in_state(state, connector, connector_state, i) {
+		if (connector_state->crtc != &crtc->base)
+			continue;
+
+		source_encoder =
+			to_intel_encoder(connector_state->best_encoder);
+		if (!encoders_cloneable(encoder, source_encoder))
+			return false;
+	}
+
+	return true;
+}
+
+static int icl_add_linked_planes(struct intel_atomic_state *state)
+{
+	struct intel_plane *plane, *linked;
+	struct intel_plane_state *plane_state, *linked_plane_state;
+	int i;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		linked = plane_state->linked_plane;
+
+		if (!linked)
+			continue;
+
+		linked_plane_state = intel_atomic_get_plane_state(state, linked);
+		if (IS_ERR(linked_plane_state))
+			return PTR_ERR(linked_plane_state);
+
+		WARN_ON(linked_plane_state->linked_plane != plane);
+		WARN_ON(linked_plane_state->slave == plane_state->slave);
+	}
+
+	return 0;
+}
+
+static int icl_check_nv12_planes(struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_atomic_state *state = to_intel_atomic_state(crtc_state->base.state);
+	struct intel_plane *plane, *linked;
+	struct intel_plane_state *plane_state;
+	int i;
+
+	if (INTEL_GEN(dev_priv) < 11)
+		return 0;
+
+	/*
+	 * Destroy all old plane links and make the slave plane invisible
+	 * in the crtc_state->active_planes mask.
+	 */
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		if (plane->pipe != crtc->pipe || !plane_state->linked_plane)
+			continue;
+
+		plane_state->linked_plane = NULL;
+		if (plane_state->slave && !plane_state->base.visible) {
+			crtc_state->active_planes &= ~BIT(plane->id);
+			crtc_state->update_planes |= BIT(plane->id);
+		}
+
+		plane_state->slave = false;
+	}
+
+	if (!crtc_state->nv12_planes)
+		return 0;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		struct intel_plane_state *linked_state = NULL;
+
+		if (plane->pipe != crtc->pipe ||
+		    !(crtc_state->nv12_planes & BIT(plane->id)))
+			continue;
+
+		for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, linked) {
+			if (!icl_is_nv12_y_plane(linked->id))
+				continue;
+
+			if (crtc_state->active_planes & BIT(linked->id))
+				continue;
+
+			linked_state = intel_atomic_get_plane_state(state, linked);
+			if (IS_ERR(linked_state))
+				return PTR_ERR(linked_state);
+
+			break;
+		}
+
+		if (!linked_state) {
+			DRM_DEBUG_KMS("Need %d free Y planes for planar YUV\n",
+				      hweight8(crtc_state->nv12_planes));
+
+			return -EINVAL;
+		}
+
+		plane_state->linked_plane = linked;
+
+		linked_state->slave = true;
+		linked_state->linked_plane = plane;
+		crtc_state->active_planes |= BIT(linked->id);
+		crtc_state->update_planes |= BIT(linked->id);
+		DRM_DEBUG_KMS("Using %s as Y plane for %s\n", linked->base.name, plane->base.name);
+	}
+
+	return 0;
+}
+
+static bool c8_planes_changed(const struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct intel_atomic_state *state =
+		to_intel_atomic_state(new_crtc_state->base.state);
+	const struct intel_crtc_state *old_crtc_state =
+		intel_atomic_get_old_crtc_state(state, crtc);
+
+	return !old_crtc_state->c8_planes != !new_crtc_state->c8_planes;
+}
+
+static int intel_crtc_atomic_check(struct drm_crtc *crtc,
+				   struct drm_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_crtc_state *pipe_config =
+		to_intel_crtc_state(crtc_state);
+	int ret;
+	bool mode_changed = needs_modeset(crtc_state);
+
+	if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv) &&
+	    mode_changed && !crtc_state->active)
+		pipe_config->update_wm_post = true;
+
+	if (mode_changed && crtc_state->enable &&
+	    dev_priv->display.crtc_compute_clock &&
+	    !WARN_ON(pipe_config->shared_dpll)) {
+		ret = dev_priv->display.crtc_compute_clock(intel_crtc,
+							   pipe_config);
+		if (ret)
+			return ret;
+	}
+
+	/*
+	 * May need to update pipe gamma enable bits
+	 * when C8 planes are getting enabled/disabled.
+	 */
+	if (c8_planes_changed(pipe_config))
+		crtc_state->color_mgmt_changed = true;
+
+	if (mode_changed || pipe_config->update_pipe ||
+	    crtc_state->color_mgmt_changed) {
+		ret = intel_color_check(pipe_config);
+		if (ret)
+			return ret;
+	}
+
+	ret = 0;
+	if (dev_priv->display.compute_pipe_wm) {
+		ret = dev_priv->display.compute_pipe_wm(pipe_config);
+		if (ret) {
+			DRM_DEBUG_KMS("Target pipe watermarks are invalid\n");
+			return ret;
+		}
+	}
+
+	if (dev_priv->display.compute_intermediate_wm) {
+		if (WARN_ON(!dev_priv->display.compute_pipe_wm))
+			return 0;
+
+		/*
+		 * Calculate 'intermediate' watermarks that satisfy both the
+		 * old state and the new state.  We can program these
+		 * immediately.
+		 */
+		ret = dev_priv->display.compute_intermediate_wm(pipe_config);
+		if (ret) {
+			DRM_DEBUG_KMS("No valid intermediate pipe watermarks are possible\n");
+			return ret;
+		}
+	}
+
+	if (INTEL_GEN(dev_priv) >= 9) {
+		if (mode_changed || pipe_config->update_pipe)
+			ret = skl_update_scaler_crtc(pipe_config);
+
+		if (!ret)
+			ret = icl_check_nv12_planes(pipe_config);
+		if (!ret)
+			ret = skl_check_pipe_max_pixel_rate(intel_crtc,
+							    pipe_config);
+		if (!ret)
+			ret = intel_atomic_setup_scalers(dev_priv, intel_crtc,
+							 pipe_config);
+	}
+
+	if (HAS_IPS(dev_priv))
+		pipe_config->ips_enabled = hsw_compute_ips_config(pipe_config);
+
+	return ret;
+}
+
+static const struct drm_crtc_helper_funcs intel_helper_funcs = {
+	.atomic_check = intel_crtc_atomic_check,
+};
+
+static void intel_modeset_update_connector_atomic_state(struct drm_device *dev)
+{
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (connector->base.state->crtc)
+			drm_connector_put(&connector->base);
+
+		if (connector->base.encoder) {
+			connector->base.state->best_encoder =
+				connector->base.encoder;
+			connector->base.state->crtc =
+				connector->base.encoder->crtc;
+
+			drm_connector_get(&connector->base);
+		} else {
+			connector->base.state->best_encoder = NULL;
+			connector->base.state->crtc = NULL;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+}
+
+static int
+compute_sink_pipe_bpp(const struct drm_connector_state *conn_state,
+		      struct intel_crtc_state *pipe_config)
+{
+	struct drm_connector *connector = conn_state->connector;
+	const struct drm_display_info *info = &connector->display_info;
+	int bpp;
+
+	switch (conn_state->max_bpc) {
+	case 6 ... 7:
+		bpp = 6 * 3;
+		break;
+	case 8 ... 9:
+		bpp = 8 * 3;
+		break;
+	case 10 ... 11:
+		bpp = 10 * 3;
+		break;
+	case 12:
+		bpp = 12 * 3;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (bpp < pipe_config->pipe_bpp) {
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Limiting display bpp to %d instead of "
+			      "EDID bpp %d, requested bpp %d, max platform bpp %d\n",
+			      connector->base.id, connector->name,
+			      bpp, 3 * info->bpc, 3 * conn_state->max_requested_bpc,
+			      pipe_config->pipe_bpp);
+
+		pipe_config->pipe_bpp = bpp;
+	}
+
+	return 0;
+}
+
+static int
+compute_baseline_pipe_bpp(struct intel_crtc *crtc,
+			  struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct drm_atomic_state *state = pipe_config->base.state;
+	struct drm_connector *connector;
+	struct drm_connector_state *connector_state;
+	int bpp, i;
+
+	if ((IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
+	    IS_CHERRYVIEW(dev_priv)))
+		bpp = 10*3;
+	else if (INTEL_GEN(dev_priv) >= 5)
+		bpp = 12*3;
+	else
+		bpp = 8*3;
+
+	pipe_config->pipe_bpp = bpp;
+
+	/* Clamp display bpp to connector max bpp */
+	for_each_new_connector_in_state(state, connector, connector_state, i) {
+		int ret;
+
+		if (connector_state->crtc != &crtc->base)
+			continue;
+
+		ret = compute_sink_pipe_bpp(connector_state, pipe_config);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static void intel_dump_crtc_timings(const struct drm_display_mode *mode)
+{
+	DRM_DEBUG_KMS("crtc timings: %d %d %d %d %d %d %d %d %d, "
+		      "type: 0x%x flags: 0x%x\n",
+		      mode->crtc_clock,
+		      mode->crtc_hdisplay, mode->crtc_hsync_start,
+		      mode->crtc_hsync_end, mode->crtc_htotal,
+		      mode->crtc_vdisplay, mode->crtc_vsync_start,
+		      mode->crtc_vsync_end, mode->crtc_vtotal,
+		      mode->type, mode->flags);
+}
+
+static inline void
+intel_dump_m_n_config(const struct intel_crtc_state *pipe_config,
+		      const char *id, unsigned int lane_count,
+		      const struct intel_link_m_n *m_n)
+{
+	DRM_DEBUG_KMS("%s: lanes: %i; gmch_m: %u, gmch_n: %u, link_m: %u, link_n: %u, tu: %u\n",
+		      id, lane_count,
+		      m_n->gmch_m, m_n->gmch_n,
+		      m_n->link_m, m_n->link_n, m_n->tu);
+}
+
+static void
+intel_dump_infoframe(struct drm_i915_private *dev_priv,
+		     const union hdmi_infoframe *frame)
+{
+	if ((drm_debug & DRM_UT_KMS) == 0)
+		return;
+
+	hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, frame);
+}
+
+#define OUTPUT_TYPE(x) [INTEL_OUTPUT_ ## x] = #x
+
+static const char * const output_type_str[] = {
+	OUTPUT_TYPE(UNUSED),
+	OUTPUT_TYPE(ANALOG),
+	OUTPUT_TYPE(DVO),
+	OUTPUT_TYPE(SDVO),
+	OUTPUT_TYPE(LVDS),
+	OUTPUT_TYPE(TVOUT),
+	OUTPUT_TYPE(HDMI),
+	OUTPUT_TYPE(DP),
+	OUTPUT_TYPE(EDP),
+	OUTPUT_TYPE(DSI),
+	OUTPUT_TYPE(DDI),
+	OUTPUT_TYPE(DP_MST),
+};
+
+#undef OUTPUT_TYPE
+
+static void snprintf_output_types(char *buf, size_t len,
+				  unsigned int output_types)
+{
+	char *str = buf;
+	int i;
+
+	str[0] = '\0';
+
+	for (i = 0; i < ARRAY_SIZE(output_type_str); i++) {
+		int r;
+
+		if ((output_types & BIT(i)) == 0)
+			continue;
+
+		r = snprintf(str, len, "%s%s",
+			     str != buf ? "," : "", output_type_str[i]);
+		if (r >= len)
+			break;
+		str += r;
+		len -= r;
+
+		output_types &= ~BIT(i);
+	}
+
+	WARN_ON_ONCE(output_types != 0);
+}
+
+static const char * const output_format_str[] = {
+	[INTEL_OUTPUT_FORMAT_INVALID] = "Invalid",
+	[INTEL_OUTPUT_FORMAT_RGB] = "RGB",
+	[INTEL_OUTPUT_FORMAT_YCBCR420] = "YCBCR4:2:0",
+	[INTEL_OUTPUT_FORMAT_YCBCR444] = "YCBCR4:4:4",
+};
+
+static const char *output_formats(enum intel_output_format format)
+{
+	if (format >= ARRAY_SIZE(output_format_str))
+		format = INTEL_OUTPUT_FORMAT_INVALID;
+	return output_format_str[format];
+}
+
+static void intel_dump_plane_state(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	struct drm_format_name_buf format_name;
+
+	if (!fb) {
+		DRM_DEBUG_KMS("[PLANE:%d:%s] fb: [NOFB], visible: %s\n",
+			      plane->base.base.id, plane->base.name,
+			      yesno(plane_state->base.visible));
+		return;
+	}
+
+	DRM_DEBUG_KMS("[PLANE:%d:%s] fb: [FB:%d] %ux%u format = %s, visible: %s\n",
+		      plane->base.base.id, plane->base.name,
+		      fb->base.id, fb->width, fb->height,
+		      drm_get_format_name(fb->format->format, &format_name),
+		      yesno(plane_state->base.visible));
+	DRM_DEBUG_KMS("\trotation: 0x%x, scaler: %d\n",
+		      plane_state->base.rotation, plane_state->scaler_id);
+	if (plane_state->base.visible)
+		DRM_DEBUG_KMS("\tsrc: " DRM_RECT_FP_FMT " dst: " DRM_RECT_FMT "\n",
+			      DRM_RECT_FP_ARG(&plane_state->base.src),
+			      DRM_RECT_ARG(&plane_state->base.dst));
+}
+
+static void intel_dump_pipe_config(const struct intel_crtc_state *pipe_config,
+				   struct intel_atomic_state *state,
+				   const char *context)
+{
+	struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct intel_plane_state *plane_state;
+	struct intel_plane *plane;
+	char buf[64];
+	int i;
+
+	DRM_DEBUG_KMS("[CRTC:%d:%s] enable: %s %s\n",
+		      crtc->base.base.id, crtc->base.name,
+		      yesno(pipe_config->base.enable), context);
+
+	if (!pipe_config->base.enable)
+		goto dump_planes;
+
+	snprintf_output_types(buf, sizeof(buf), pipe_config->output_types);
+	DRM_DEBUG_KMS("active: %s, output_types: %s (0x%x), output format: %s\n",
+		      yesno(pipe_config->base.active),
+		      buf, pipe_config->output_types,
+		      output_formats(pipe_config->output_format));
+
+	DRM_DEBUG_KMS("cpu_transcoder: %s, pipe bpp: %i, dithering: %i\n",
+		      transcoder_name(pipe_config->cpu_transcoder),
+		      pipe_config->pipe_bpp, pipe_config->dither);
+
+	if (pipe_config->has_pch_encoder)
+		intel_dump_m_n_config(pipe_config, "fdi",
+				      pipe_config->fdi_lanes,
+				      &pipe_config->fdi_m_n);
+
+	if (intel_crtc_has_dp_encoder(pipe_config)) {
+		intel_dump_m_n_config(pipe_config, "dp m_n",
+				pipe_config->lane_count, &pipe_config->dp_m_n);
+		if (pipe_config->has_drrs)
+			intel_dump_m_n_config(pipe_config, "dp m2_n2",
+					      pipe_config->lane_count,
+					      &pipe_config->dp_m2_n2);
+	}
+
+	DRM_DEBUG_KMS("audio: %i, infoframes: %i, infoframes enabled: 0x%x\n",
+		      pipe_config->has_audio, pipe_config->has_infoframe,
+		      pipe_config->infoframes.enable);
+
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GENERAL_CONTROL))
+		DRM_DEBUG_KMS("GCP: 0x%x\n", pipe_config->infoframes.gcp);
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI))
+		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.avi);
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_SPD))
+		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.spd);
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_VENDOR))
+		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.hdmi);
+
+	DRM_DEBUG_KMS("requested mode:\n");
+	drm_mode_debug_printmodeline(&pipe_config->base.mode);
+	DRM_DEBUG_KMS("adjusted mode:\n");
+	drm_mode_debug_printmodeline(&pipe_config->base.adjusted_mode);
+	intel_dump_crtc_timings(&pipe_config->base.adjusted_mode);
+	DRM_DEBUG_KMS("port clock: %d, pipe src size: %dx%d, pixel rate %d\n",
+		      pipe_config->port_clock,
+		      pipe_config->pipe_src_w, pipe_config->pipe_src_h,
+		      pipe_config->pixel_rate);
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		DRM_DEBUG_KMS("num_scalers: %d, scaler_users: 0x%x, scaler_id: %d\n",
+			      crtc->num_scalers,
+			      pipe_config->scaler_state.scaler_users,
+		              pipe_config->scaler_state.scaler_id);
+
+	if (HAS_GMCH(dev_priv))
+		DRM_DEBUG_KMS("gmch pfit: control: 0x%08x, ratios: 0x%08x, lvds border: 0x%08x\n",
+			      pipe_config->gmch_pfit.control,
+			      pipe_config->gmch_pfit.pgm_ratios,
+			      pipe_config->gmch_pfit.lvds_border_bits);
+	else
+		DRM_DEBUG_KMS("pch pfit: pos: 0x%08x, size: 0x%08x, %s, force thru: %s\n",
+			      pipe_config->pch_pfit.pos,
+			      pipe_config->pch_pfit.size,
+			      enableddisabled(pipe_config->pch_pfit.enabled),
+			      yesno(pipe_config->pch_pfit.force_thru));
+
+	DRM_DEBUG_KMS("ips: %i, double wide: %i\n",
+		      pipe_config->ips_enabled, pipe_config->double_wide);
+
+	intel_dpll_dump_hw_state(dev_priv, &pipe_config->dpll_hw_state);
+
+dump_planes:
+	if (!state)
+		return;
+
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		if (plane->pipe == crtc->pipe)
+			intel_dump_plane_state(plane_state);
+	}
+}
+
+static bool check_digital_port_conflicts(struct intel_atomic_state *state)
+{
+	struct drm_device *dev = state->base.dev;
+	struct drm_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	unsigned int used_ports = 0;
+	unsigned int used_mst_ports = 0;
+	bool ret = true;
+
+	/*
+	 * Walk the connector list instead of the encoder
+	 * list to detect the problem on ddi platforms
+	 * where there's just one encoder per digital port.
+	 */
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		struct drm_connector_state *connector_state;
+		struct intel_encoder *encoder;
+
+		connector_state =
+			drm_atomic_get_new_connector_state(&state->base,
+							   connector);
+		if (!connector_state)
+			connector_state = connector->state;
+
+		if (!connector_state->best_encoder)
+			continue;
+
+		encoder = to_intel_encoder(connector_state->best_encoder);
+
+		WARN_ON(!connector_state->crtc);
+
+		switch (encoder->type) {
+			unsigned int port_mask;
+		case INTEL_OUTPUT_DDI:
+			if (WARN_ON(!HAS_DDI(to_i915(dev))))
+				break;
+			/* else: fall through */
+		case INTEL_OUTPUT_DP:
+		case INTEL_OUTPUT_HDMI:
+		case INTEL_OUTPUT_EDP:
+			port_mask = 1 << encoder->port;
+
+			/* the same port mustn't appear more than once */
+			if (used_ports & port_mask)
+				ret = false;
+
+			used_ports |= port_mask;
+			break;
+		case INTEL_OUTPUT_DP_MST:
+			used_mst_ports |=
+				1 << encoder->port;
+			break;
+		default:
+			break;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	/* can't mix MST and SST/HDMI on the same port */
+	if (used_ports & used_mst_ports)
+		return false;
+
+	return ret;
+}
+
+static int
+clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(crtc_state->base.crtc->dev);
+	struct intel_crtc_state *saved_state;
+
+	saved_state = kzalloc(sizeof(*saved_state), GFP_KERNEL);
+	if (!saved_state)
+		return -ENOMEM;
+
+	/* FIXME: before the switch to atomic started, a new pipe_config was
+	 * kzalloc'd. Code that depends on any field being zero should be
+	 * fixed, so that the crtc_state can be safely duplicated. For now,
+	 * only fields that are know to not cause problems are preserved. */
+
+	saved_state->scaler_state = crtc_state->scaler_state;
+	saved_state->shared_dpll = crtc_state->shared_dpll;
+	saved_state->dpll_hw_state = crtc_state->dpll_hw_state;
+	saved_state->crc_enabled = crtc_state->crc_enabled;
+	if (IS_G4X(dev_priv) ||
+	    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		saved_state->wm = crtc_state->wm;
+
+	/* Keep base drm_crtc_state intact, only clear our extended struct */
+	BUILD_BUG_ON(offsetof(struct intel_crtc_state, base));
+	memcpy(&crtc_state->base + 1, &saved_state->base + 1,
+	       sizeof(*crtc_state) - sizeof(crtc_state->base));
+
+	kfree(saved_state);
+	return 0;
+}
+
+static int
+intel_modeset_pipe_config(struct intel_crtc_state *pipe_config)
+{
+	struct drm_crtc *crtc = pipe_config->base.crtc;
+	struct drm_atomic_state *state = pipe_config->base.state;
+	struct intel_encoder *encoder;
+	struct drm_connector *connector;
+	struct drm_connector_state *connector_state;
+	int base_bpp, ret;
+	int i;
+	bool retry = true;
+
+	ret = clear_intel_crtc_state(pipe_config);
+	if (ret)
+		return ret;
+
+	pipe_config->cpu_transcoder =
+		(enum transcoder) to_intel_crtc(crtc)->pipe;
+
+	/*
+	 * Sanitize sync polarity flags based on requested ones. If neither
+	 * positive or negative polarity is requested, treat this as meaning
+	 * negative polarity.
+	 */
+	if (!(pipe_config->base.adjusted_mode.flags &
+	      (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC)))
+		pipe_config->base.adjusted_mode.flags |= DRM_MODE_FLAG_NHSYNC;
+
+	if (!(pipe_config->base.adjusted_mode.flags &
+	      (DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC)))
+		pipe_config->base.adjusted_mode.flags |= DRM_MODE_FLAG_NVSYNC;
+
+	ret = compute_baseline_pipe_bpp(to_intel_crtc(crtc),
+					pipe_config);
+	if (ret)
+		return ret;
+
+	base_bpp = pipe_config->pipe_bpp;
+
+	/*
+	 * Determine the real pipe dimensions. Note that stereo modes can
+	 * increase the actual pipe size due to the frame doubling and
+	 * insertion of additional space for blanks between the frame. This
+	 * is stored in the crtc timings. We use the requested mode to do this
+	 * computation to clearly distinguish it from the adjusted mode, which
+	 * can be changed by the connectors in the below retry loop.
+	 */
+	drm_mode_get_hv_timing(&pipe_config->base.mode,
+			       &pipe_config->pipe_src_w,
+			       &pipe_config->pipe_src_h);
+
+	for_each_new_connector_in_state(state, connector, connector_state, i) {
+		if (connector_state->crtc != crtc)
+			continue;
+
+		encoder = to_intel_encoder(connector_state->best_encoder);
+
+		if (!check_single_encoder_cloning(state, to_intel_crtc(crtc), encoder)) {
+			DRM_DEBUG_KMS("rejecting invalid cloning configuration\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * Determine output_types before calling the .compute_config()
+		 * hooks so that the hooks can use this information safely.
+		 */
+		if (encoder->compute_output_type)
+			pipe_config->output_types |=
+				BIT(encoder->compute_output_type(encoder, pipe_config,
+								 connector_state));
+		else
+			pipe_config->output_types |= BIT(encoder->type);
+	}
+
+encoder_retry:
+	/* Ensure the port clock defaults are reset when retrying. */
+	pipe_config->port_clock = 0;
+	pipe_config->pixel_multiplier = 1;
+
+	/* Fill in default crtc timings, allow encoders to overwrite them. */
+	drm_mode_set_crtcinfo(&pipe_config->base.adjusted_mode,
+			      CRTC_STEREO_DOUBLE);
+
+	/* Pass our mode to the connectors and the CRTC to give them a chance to
+	 * adjust it according to limitations or connector properties, and also
+	 * a chance to reject the mode entirely.
+	 */
+	for_each_new_connector_in_state(state, connector, connector_state, i) {
+		if (connector_state->crtc != crtc)
+			continue;
+
+		encoder = to_intel_encoder(connector_state->best_encoder);
+		ret = encoder->compute_config(encoder, pipe_config,
+					      connector_state);
+		if (ret < 0) {
+			if (ret != -EDEADLK)
+				DRM_DEBUG_KMS("Encoder config failure: %d\n",
+					      ret);
+			return ret;
+		}
+	}
+
+	/* Set default port clock if not overwritten by the encoder. Needs to be
+	 * done afterwards in case the encoder adjusts the mode. */
+	if (!pipe_config->port_clock)
+		pipe_config->port_clock = pipe_config->base.adjusted_mode.crtc_clock
+			* pipe_config->pixel_multiplier;
+
+	ret = intel_crtc_compute_config(to_intel_crtc(crtc), pipe_config);
+	if (ret == -EDEADLK)
+		return ret;
+	if (ret < 0) {
+		DRM_DEBUG_KMS("CRTC fixup failed\n");
+		return ret;
+	}
+
+	if (ret == RETRY) {
+		if (WARN(!retry, "loop in pipe configuration computation\n"))
+			return -EINVAL;
+
+		DRM_DEBUG_KMS("CRTC bw constrained, retrying\n");
+		retry = false;
+		goto encoder_retry;
+	}
+
+	/* Dithering seems to not pass-through bits correctly when it should, so
+	 * only enable it on 6bpc panels and when its not a compliance
+	 * test requesting 6bpc video pattern.
+	 */
+	pipe_config->dither = (pipe_config->pipe_bpp == 6*3) &&
+		!pipe_config->dither_force_disable;
+	DRM_DEBUG_KMS("hw max bpp: %i, pipe bpp: %i, dithering: %i\n",
+		      base_bpp, pipe_config->pipe_bpp, pipe_config->dither);
+
+	return 0;
+}
+
+bool intel_fuzzy_clock_check(int clock1, int clock2)
+{
+	int diff;
+
+	if (clock1 == clock2)
+		return true;
+
+	if (!clock1 || !clock2)
+		return false;
+
+	diff = abs(clock1 - clock2);
+
+	if (((((diff + clock1 + clock2) * 100)) / (clock1 + clock2)) < 105)
+		return true;
+
+	return false;
+}
+
+static bool
+intel_compare_m_n(unsigned int m, unsigned int n,
+		  unsigned int m2, unsigned int n2,
+		  bool exact)
+{
+	if (m == m2 && n == n2)
+		return true;
+
+	if (exact || !m || !n || !m2 || !n2)
+		return false;
+
+	BUILD_BUG_ON(DATA_LINK_M_N_MASK > INT_MAX);
+
+	if (n > n2) {
+		while (n > n2) {
+			m2 <<= 1;
+			n2 <<= 1;
+		}
+	} else if (n < n2) {
+		while (n < n2) {
+			m <<= 1;
+			n <<= 1;
+		}
+	}
+
+	if (n != n2)
+		return false;
+
+	return intel_fuzzy_clock_check(m, m2);
+}
+
+static bool
+intel_compare_link_m_n(const struct intel_link_m_n *m_n,
+		       struct intel_link_m_n *m2_n2,
+		       bool adjust)
+{
+	if (m_n->tu == m2_n2->tu &&
+	    intel_compare_m_n(m_n->gmch_m, m_n->gmch_n,
+			      m2_n2->gmch_m, m2_n2->gmch_n, !adjust) &&
+	    intel_compare_m_n(m_n->link_m, m_n->link_n,
+			      m2_n2->link_m, m2_n2->link_n, !adjust)) {
+		if (adjust)
+			*m2_n2 = *m_n;
+
+		return true;
+	}
+
+	return false;
+}
+
+static bool
+intel_compare_infoframe(const union hdmi_infoframe *a,
+			const union hdmi_infoframe *b)
+{
+	return memcmp(a, b, sizeof(*a)) == 0;
+}
+
+static void
+pipe_config_infoframe_err(struct drm_i915_private *dev_priv,
+			  bool adjust, const char *name,
+			  const union hdmi_infoframe *a,
+			  const union hdmi_infoframe *b)
+{
+	if (adjust) {
+		if ((drm_debug & DRM_UT_KMS) == 0)
+			return;
+
+		drm_dbg(DRM_UT_KMS, "mismatch in %s infoframe", name);
+		drm_dbg(DRM_UT_KMS, "expected:");
+		hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, a);
+		drm_dbg(DRM_UT_KMS, "found");
+		hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, b);
+	} else {
+		drm_err("mismatch in %s infoframe", name);
+		drm_err("expected:");
+		hdmi_infoframe_log(KERN_ERR, dev_priv->drm.dev, a);
+		drm_err("found");
+		hdmi_infoframe_log(KERN_ERR, dev_priv->drm.dev, b);
+	}
+}
+
+static void __printf(3, 4)
+pipe_config_err(bool adjust, const char *name, const char *format, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, format);
+	vaf.fmt = format;
+	vaf.va = &args;
+
+	if (adjust)
+		drm_dbg(DRM_UT_KMS, "mismatch in %s %pV", name, &vaf);
+	else
+		drm_err("mismatch in %s %pV", name, &vaf);
+
+	va_end(args);
+}
+
+static bool fastboot_enabled(struct drm_i915_private *dev_priv)
+{
+	if (i915_modparams.fastboot != -1)
+		return i915_modparams.fastboot;
+
+	/* Enable fastboot by default on Skylake and newer */
+	if (INTEL_GEN(dev_priv) >= 9)
+		return true;
+
+	/* Enable fastboot by default on VLV and CHV */
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		return true;
+
+	/* Disabled by default on all others */
+	return false;
+}
+
+static bool
+intel_pipe_config_compare(struct drm_i915_private *dev_priv,
+			  struct intel_crtc_state *current_config,
+			  struct intel_crtc_state *pipe_config,
+			  bool adjust)
+{
+	bool ret = true;
+	bool fixup_inherited = adjust &&
+		(current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
+		!(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
+
+	if (fixup_inherited && !fastboot_enabled(dev_priv)) {
+		DRM_DEBUG_KMS("initial modeset and fastboot not set\n");
+		ret = false;
+	}
+
+#define PIPE_CONF_CHECK_X(name) do { \
+	if (current_config->name != pipe_config->name) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected 0x%08x, found 0x%08x)\n", \
+			  current_config->name, \
+			  pipe_config->name); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_I(name) do { \
+	if (current_config->name != pipe_config->name) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected %i, found %i)\n", \
+			  current_config->name, \
+			  pipe_config->name); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_BOOL(name) do { \
+	if (current_config->name != pipe_config->name) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected %s, found %s)\n", \
+			  yesno(current_config->name), \
+			  yesno(pipe_config->name)); \
+		ret = false; \
+	} \
+} while (0)
+
+/*
+ * Checks state where we only read out the enabling, but not the entire
+ * state itself (like full infoframes or ELD for audio). These states
+ * require a full modeset on bootup to fix up.
+ */
+#define PIPE_CONF_CHECK_BOOL_INCOMPLETE(name) do { \
+	if (!fixup_inherited || (!current_config->name && !pipe_config->name)) { \
+		PIPE_CONF_CHECK_BOOL(name); \
+	} else { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "unable to verify whether state matches exactly, forcing modeset (expected %s, found %s)\n", \
+			  yesno(current_config->name), \
+			  yesno(pipe_config->name)); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_P(name) do { \
+	if (current_config->name != pipe_config->name) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected %p, found %p)\n", \
+			  current_config->name, \
+			  pipe_config->name); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_M_N(name) do { \
+	if (!intel_compare_link_m_n(&current_config->name, \
+				    &pipe_config->name,\
+				    adjust)) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected tu %i gmch %i/%i link %i/%i, " \
+			  "found tu %i, gmch %i/%i link %i/%i)\n", \
+			  current_config->name.tu, \
+			  current_config->name.gmch_m, \
+			  current_config->name.gmch_n, \
+			  current_config->name.link_m, \
+			  current_config->name.link_n, \
+			  pipe_config->name.tu, \
+			  pipe_config->name.gmch_m, \
+			  pipe_config->name.gmch_n, \
+			  pipe_config->name.link_m, \
+			  pipe_config->name.link_n); \
+		ret = false; \
+	} \
+} while (0)
+
+/* This is required for BDW+ where there is only one set of registers for
+ * switching between high and low RR.
+ * This macro can be used whenever a comparison has to be made between one
+ * hw state and multiple sw state variables.
+ */
+#define PIPE_CONF_CHECK_M_N_ALT(name, alt_name) do { \
+	if (!intel_compare_link_m_n(&current_config->name, \
+				    &pipe_config->name, adjust) && \
+	    !intel_compare_link_m_n(&current_config->alt_name, \
+				    &pipe_config->name, adjust)) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected tu %i gmch %i/%i link %i/%i, " \
+			  "or tu %i gmch %i/%i link %i/%i, " \
+			  "found tu %i, gmch %i/%i link %i/%i)\n", \
+			  current_config->name.tu, \
+			  current_config->name.gmch_m, \
+			  current_config->name.gmch_n, \
+			  current_config->name.link_m, \
+			  current_config->name.link_n, \
+			  current_config->alt_name.tu, \
+			  current_config->alt_name.gmch_m, \
+			  current_config->alt_name.gmch_n, \
+			  current_config->alt_name.link_m, \
+			  current_config->alt_name.link_n, \
+			  pipe_config->name.tu, \
+			  pipe_config->name.gmch_m, \
+			  pipe_config->name.gmch_n, \
+			  pipe_config->name.link_m, \
+			  pipe_config->name.link_n); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_FLAGS(name, mask) do { \
+	if ((current_config->name ^ pipe_config->name) & (mask)) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(%x) (expected %i, found %i)\n", \
+			  (mask), \
+			  current_config->name & (mask), \
+			  pipe_config->name & (mask)); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_CLOCK_FUZZY(name) do { \
+	if (!intel_fuzzy_clock_check(current_config->name, pipe_config->name)) { \
+		pipe_config_err(adjust, __stringify(name), \
+			  "(expected %i, found %i)\n", \
+			  current_config->name, \
+			  pipe_config->name); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_CHECK_INFOFRAME(name) do { \
+	if (!intel_compare_infoframe(&current_config->infoframes.name, \
+				     &pipe_config->infoframes.name)) { \
+		pipe_config_infoframe_err(dev_priv, adjust, __stringify(name), \
+					  &current_config->infoframes.name, \
+					  &pipe_config->infoframes.name); \
+		ret = false; \
+	} \
+} while (0)
+
+#define PIPE_CONF_QUIRK(quirk) \
+	((current_config->quirks | pipe_config->quirks) & (quirk))
+
+	PIPE_CONF_CHECK_I(cpu_transcoder);
+
+	PIPE_CONF_CHECK_BOOL(has_pch_encoder);
+	PIPE_CONF_CHECK_I(fdi_lanes);
+	PIPE_CONF_CHECK_M_N(fdi_m_n);
+
+	PIPE_CONF_CHECK_I(lane_count);
+	PIPE_CONF_CHECK_X(lane_lat_optim_mask);
+
+	if (INTEL_GEN(dev_priv) < 8) {
+		PIPE_CONF_CHECK_M_N(dp_m_n);
+
+		if (current_config->has_drrs)
+			PIPE_CONF_CHECK_M_N(dp_m2_n2);
+	} else
+		PIPE_CONF_CHECK_M_N_ALT(dp_m_n, dp_m2_n2);
+
+	PIPE_CONF_CHECK_X(output_types);
+
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hdisplay);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_htotal);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hblank_start);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hblank_end);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hsync_start);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_hsync_end);
+
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vdisplay);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vtotal);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vblank_start);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vblank_end);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vsync_start);
+	PIPE_CONF_CHECK_I(base.adjusted_mode.crtc_vsync_end);
+
+	PIPE_CONF_CHECK_I(pixel_multiplier);
+	PIPE_CONF_CHECK_I(output_format);
+	PIPE_CONF_CHECK_BOOL(has_hdmi_sink);
+	if ((INTEL_GEN(dev_priv) < 8 && !IS_HASWELL(dev_priv)) ||
+	    IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		PIPE_CONF_CHECK_BOOL(limited_color_range);
+
+	PIPE_CONF_CHECK_BOOL(hdmi_scrambling);
+	PIPE_CONF_CHECK_BOOL(hdmi_high_tmds_clock_ratio);
+	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_infoframe);
+
+	PIPE_CONF_CHECK_BOOL_INCOMPLETE(has_audio);
+
+	PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
+			      DRM_MODE_FLAG_INTERLACE);
+
+	if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS)) {
+		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
+				      DRM_MODE_FLAG_PHSYNC);
+		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
+				      DRM_MODE_FLAG_NHSYNC);
+		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
+				      DRM_MODE_FLAG_PVSYNC);
+		PIPE_CONF_CHECK_FLAGS(base.adjusted_mode.flags,
+				      DRM_MODE_FLAG_NVSYNC);
+	}
+
+	PIPE_CONF_CHECK_X(gmch_pfit.control);
+	/* pfit ratios are autocomputed by the hw on gen4+ */
+	if (INTEL_GEN(dev_priv) < 4)
+		PIPE_CONF_CHECK_X(gmch_pfit.pgm_ratios);
+	PIPE_CONF_CHECK_X(gmch_pfit.lvds_border_bits);
+
+	/*
+	 * Changing the EDP transcoder input mux
+	 * (A_ONOFF vs. A_ON) requires a full modeset.
+	 */
+	PIPE_CONF_CHECK_BOOL(pch_pfit.force_thru);
+
+	if (!adjust) {
+		PIPE_CONF_CHECK_I(pipe_src_w);
+		PIPE_CONF_CHECK_I(pipe_src_h);
+
+		PIPE_CONF_CHECK_BOOL(pch_pfit.enabled);
+		if (current_config->pch_pfit.enabled) {
+			PIPE_CONF_CHECK_X(pch_pfit.pos);
+			PIPE_CONF_CHECK_X(pch_pfit.size);
+		}
+
+		PIPE_CONF_CHECK_I(scaler_state.scaler_id);
+		PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
+
+		PIPE_CONF_CHECK_X(gamma_mode);
+		if (IS_CHERRYVIEW(dev_priv))
+			PIPE_CONF_CHECK_X(cgm_mode);
+		else
+			PIPE_CONF_CHECK_X(csc_mode);
+		PIPE_CONF_CHECK_BOOL(gamma_enable);
+		PIPE_CONF_CHECK_BOOL(csc_enable);
+	}
+
+	PIPE_CONF_CHECK_BOOL(double_wide);
+
+	PIPE_CONF_CHECK_P(shared_dpll);
+	PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
+	PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
+	PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
+	PIPE_CONF_CHECK_X(dpll_hw_state.fp1);
+	PIPE_CONF_CHECK_X(dpll_hw_state.wrpll);
+	PIPE_CONF_CHECK_X(dpll_hw_state.spll);
+	PIPE_CONF_CHECK_X(dpll_hw_state.ctrl1);
+	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr1);
+	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr2);
+	PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr0);
+	PIPE_CONF_CHECK_X(dpll_hw_state.ebb0);
+	PIPE_CONF_CHECK_X(dpll_hw_state.ebb4);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll0);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll1);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll2);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll3);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll6);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll8);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll9);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pll10);
+	PIPE_CONF_CHECK_X(dpll_hw_state.pcsdw12);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_refclkin_ctl);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_coreclkctl1);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_clktop2_hsclkctl);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div0);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_div1);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_lf);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_frac_lock);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_ssc);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_bias);
+	PIPE_CONF_CHECK_X(dpll_hw_state.mg_pll_tdc_coldst_bias);
+
+	PIPE_CONF_CHECK_X(dsi_pll.ctrl);
+	PIPE_CONF_CHECK_X(dsi_pll.div);
+
+	if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5)
+		PIPE_CONF_CHECK_I(pipe_bpp);
+
+	PIPE_CONF_CHECK_CLOCK_FUZZY(base.adjusted_mode.crtc_clock);
+	PIPE_CONF_CHECK_CLOCK_FUZZY(port_clock);
+
+	PIPE_CONF_CHECK_I(min_voltage_level);
+
+	PIPE_CONF_CHECK_X(infoframes.enable);
+	PIPE_CONF_CHECK_X(infoframes.gcp);
+	PIPE_CONF_CHECK_INFOFRAME(avi);
+	PIPE_CONF_CHECK_INFOFRAME(spd);
+	PIPE_CONF_CHECK_INFOFRAME(hdmi);
+	PIPE_CONF_CHECK_INFOFRAME(drm);
+
+#undef PIPE_CONF_CHECK_X
+#undef PIPE_CONF_CHECK_I
+#undef PIPE_CONF_CHECK_BOOL
+#undef PIPE_CONF_CHECK_BOOL_INCOMPLETE
+#undef PIPE_CONF_CHECK_P
+#undef PIPE_CONF_CHECK_FLAGS
+#undef PIPE_CONF_CHECK_CLOCK_FUZZY
+#undef PIPE_CONF_QUIRK
+
+	return ret;
+}
+
+static void intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
+					   const struct intel_crtc_state *pipe_config)
+{
+	if (pipe_config->has_pch_encoder) {
+		int fdi_dotclock = intel_dotclock_calculate(intel_fdi_link_freq(dev_priv, pipe_config),
+							    &pipe_config->fdi_m_n);
+		int dotclock = pipe_config->base.adjusted_mode.crtc_clock;
+
+		/*
+		 * FDI already provided one idea for the dotclock.
+		 * Yell if the encoder disagrees.
+		 */
+		WARN(!intel_fuzzy_clock_check(fdi_dotclock, dotclock),
+		     "FDI dotclock and encoder dotclock mismatch, fdi: %i, encoder: %i\n",
+		     fdi_dotclock, dotclock);
+	}
+}
+
+static void verify_wm_state(struct drm_crtc *crtc,
+			    struct drm_crtc_state *new_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct skl_hw_state {
+		struct skl_ddb_entry ddb_y[I915_MAX_PLANES];
+		struct skl_ddb_entry ddb_uv[I915_MAX_PLANES];
+		struct skl_ddb_allocation ddb;
+		struct skl_pipe_wm wm;
+	} *hw;
+	struct skl_ddb_allocation *sw_ddb;
+	struct skl_pipe_wm *sw_wm;
+	struct skl_ddb_entry *hw_ddb_entry, *sw_ddb_entry;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	const enum pipe pipe = intel_crtc->pipe;
+	int plane, level, max_level = ilk_wm_max_level(dev_priv);
+
+	if (INTEL_GEN(dev_priv) < 9 || !new_state->active)
+		return;
+
+	hw = kzalloc(sizeof(*hw), GFP_KERNEL);
+	if (!hw)
+		return;
+
+	skl_pipe_wm_get_hw_state(intel_crtc, &hw->wm);
+	sw_wm = &to_intel_crtc_state(new_state)->wm.skl.optimal;
+
+	skl_pipe_ddb_get_hw_state(intel_crtc, hw->ddb_y, hw->ddb_uv);
+
+	skl_ddb_get_hw_state(dev_priv, &hw->ddb);
+	sw_ddb = &dev_priv->wm.skl_hw.ddb;
+
+	if (INTEL_GEN(dev_priv) >= 11 &&
+	    hw->ddb.enabled_slices != sw_ddb->enabled_slices)
+		DRM_ERROR("mismatch in DBUF Slices (expected %u, got %u)\n",
+			  sw_ddb->enabled_slices,
+			  hw->ddb.enabled_slices);
+
+	/* planes */
+	for_each_universal_plane(dev_priv, pipe, plane) {
+		struct skl_plane_wm *hw_plane_wm, *sw_plane_wm;
+
+		hw_plane_wm = &hw->wm.planes[plane];
+		sw_plane_wm = &sw_wm->planes[plane];
+
+		/* Watermarks */
+		for (level = 0; level <= max_level; level++) {
+			if (skl_wm_level_equals(&hw_plane_wm->wm[level],
+						&sw_plane_wm->wm[level]))
+				continue;
+
+			DRM_ERROR("mismatch in WM pipe %c plane %d level %d (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+				  pipe_name(pipe), plane + 1, level,
+				  sw_plane_wm->wm[level].plane_en,
+				  sw_plane_wm->wm[level].plane_res_b,
+				  sw_plane_wm->wm[level].plane_res_l,
+				  hw_plane_wm->wm[level].plane_en,
+				  hw_plane_wm->wm[level].plane_res_b,
+				  hw_plane_wm->wm[level].plane_res_l);
+		}
+
+		if (!skl_wm_level_equals(&hw_plane_wm->trans_wm,
+					 &sw_plane_wm->trans_wm)) {
+			DRM_ERROR("mismatch in trans WM pipe %c plane %d (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+				  pipe_name(pipe), plane + 1,
+				  sw_plane_wm->trans_wm.plane_en,
+				  sw_plane_wm->trans_wm.plane_res_b,
+				  sw_plane_wm->trans_wm.plane_res_l,
+				  hw_plane_wm->trans_wm.plane_en,
+				  hw_plane_wm->trans_wm.plane_res_b,
+				  hw_plane_wm->trans_wm.plane_res_l);
+		}
+
+		/* DDB */
+		hw_ddb_entry = &hw->ddb_y[plane];
+		sw_ddb_entry = &to_intel_crtc_state(new_state)->wm.skl.plane_ddb_y[plane];
+
+		if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) {
+			DRM_ERROR("mismatch in DDB state pipe %c plane %d (expected (%u,%u), found (%u,%u))\n",
+				  pipe_name(pipe), plane + 1,
+				  sw_ddb_entry->start, sw_ddb_entry->end,
+				  hw_ddb_entry->start, hw_ddb_entry->end);
+		}
+	}
+
+	/*
+	 * cursor
+	 * If the cursor plane isn't active, we may not have updated it's ddb
+	 * allocation. In that case since the ddb allocation will be updated
+	 * once the plane becomes visible, we can skip this check
+	 */
+	if (1) {
+		struct skl_plane_wm *hw_plane_wm, *sw_plane_wm;
+
+		hw_plane_wm = &hw->wm.planes[PLANE_CURSOR];
+		sw_plane_wm = &sw_wm->planes[PLANE_CURSOR];
+
+		/* Watermarks */
+		for (level = 0; level <= max_level; level++) {
+			if (skl_wm_level_equals(&hw_plane_wm->wm[level],
+						&sw_plane_wm->wm[level]))
+				continue;
+
+			DRM_ERROR("mismatch in WM pipe %c cursor level %d (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+				  pipe_name(pipe), level,
+				  sw_plane_wm->wm[level].plane_en,
+				  sw_plane_wm->wm[level].plane_res_b,
+				  sw_plane_wm->wm[level].plane_res_l,
+				  hw_plane_wm->wm[level].plane_en,
+				  hw_plane_wm->wm[level].plane_res_b,
+				  hw_plane_wm->wm[level].plane_res_l);
+		}
+
+		if (!skl_wm_level_equals(&hw_plane_wm->trans_wm,
+					 &sw_plane_wm->trans_wm)) {
+			DRM_ERROR("mismatch in trans WM pipe %c cursor (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+				  pipe_name(pipe),
+				  sw_plane_wm->trans_wm.plane_en,
+				  sw_plane_wm->trans_wm.plane_res_b,
+				  sw_plane_wm->trans_wm.plane_res_l,
+				  hw_plane_wm->trans_wm.plane_en,
+				  hw_plane_wm->trans_wm.plane_res_b,
+				  hw_plane_wm->trans_wm.plane_res_l);
+		}
+
+		/* DDB */
+		hw_ddb_entry = &hw->ddb_y[PLANE_CURSOR];
+		sw_ddb_entry = &to_intel_crtc_state(new_state)->wm.skl.plane_ddb_y[PLANE_CURSOR];
+
+		if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) {
+			DRM_ERROR("mismatch in DDB state pipe %c cursor (expected (%u,%u), found (%u,%u))\n",
+				  pipe_name(pipe),
+				  sw_ddb_entry->start, sw_ddb_entry->end,
+				  hw_ddb_entry->start, hw_ddb_entry->end);
+		}
+	}
+
+	kfree(hw);
+}
+
+static void
+verify_connector_state(struct drm_device *dev,
+		       struct drm_atomic_state *state,
+		       struct drm_crtc *crtc)
+{
+	struct drm_connector *connector;
+	struct drm_connector_state *new_conn_state;
+	int i;
+
+	for_each_new_connector_in_state(state, connector, new_conn_state, i) {
+		struct drm_encoder *encoder = connector->encoder;
+		struct drm_crtc_state *crtc_state = NULL;
+
+		if (new_conn_state->crtc != crtc)
+			continue;
+
+		if (crtc)
+			crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
+
+		intel_connector_verify_state(crtc_state, new_conn_state);
+
+		I915_STATE_WARN(new_conn_state->best_encoder != encoder,
+		     "connector's atomic encoder doesn't match legacy encoder\n");
+	}
+}
+
+static void
+verify_encoder_state(struct drm_device *dev, struct drm_atomic_state *state)
+{
+	struct intel_encoder *encoder;
+	struct drm_connector *connector;
+	struct drm_connector_state *old_conn_state, *new_conn_state;
+	int i;
+
+	for_each_intel_encoder(dev, encoder) {
+		bool enabled = false, found = false;
+		enum pipe pipe;
+
+		DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
+			      encoder->base.base.id,
+			      encoder->base.name);
+
+		for_each_oldnew_connector_in_state(state, connector, old_conn_state,
+						   new_conn_state, i) {
+			if (old_conn_state->best_encoder == &encoder->base)
+				found = true;
+
+			if (new_conn_state->best_encoder != &encoder->base)
+				continue;
+			found = enabled = true;
+
+			I915_STATE_WARN(new_conn_state->crtc !=
+					encoder->base.crtc,
+			     "connector's crtc doesn't match encoder crtc\n");
+		}
+
+		if (!found)
+			continue;
+
+		I915_STATE_WARN(!!encoder->base.crtc != enabled,
+		     "encoder's enabled state mismatch "
+		     "(expected %i, found %i)\n",
+		     !!encoder->base.crtc, enabled);
+
+		if (!encoder->base.crtc) {
+			bool active;
+
+			active = encoder->get_hw_state(encoder, &pipe);
+			I915_STATE_WARN(active,
+			     "encoder detached but still enabled on pipe %c.\n",
+			     pipe_name(pipe));
+		}
+	}
+}
+
+static void
+verify_crtc_state(struct drm_crtc *crtc,
+		  struct drm_crtc_state *old_crtc_state,
+		  struct drm_crtc_state *new_crtc_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_encoder *encoder;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_crtc_state *pipe_config, *sw_config;
+	struct drm_atomic_state *old_state;
+	bool active;
+
+	old_state = old_crtc_state->state;
+	__drm_atomic_helper_crtc_destroy_state(old_crtc_state);
+	pipe_config = to_intel_crtc_state(old_crtc_state);
+	memset(pipe_config, 0, sizeof(*pipe_config));
+	pipe_config->base.crtc = crtc;
+	pipe_config->base.state = old_state;
+
+	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
+
+	active = dev_priv->display.get_pipe_config(intel_crtc, pipe_config);
+
+	/* we keep both pipes enabled on 830 */
+	if (IS_I830(dev_priv))
+		active = new_crtc_state->active;
+
+	I915_STATE_WARN(new_crtc_state->active != active,
+	     "crtc active state doesn't match with hw state "
+	     "(expected %i, found %i)\n", new_crtc_state->active, active);
+
+	I915_STATE_WARN(intel_crtc->active != new_crtc_state->active,
+	     "transitional active state does not match atomic hw state "
+	     "(expected %i, found %i)\n", new_crtc_state->active, intel_crtc->active);
+
+	for_each_encoder_on_crtc(dev, crtc, encoder) {
+		enum pipe pipe;
+
+		active = encoder->get_hw_state(encoder, &pipe);
+		I915_STATE_WARN(active != new_crtc_state->active,
+			"[ENCODER:%i] active %i with crtc active %i\n",
+			encoder->base.base.id, active, new_crtc_state->active);
+
+		I915_STATE_WARN(active && intel_crtc->pipe != pipe,
+				"Encoder connected to wrong pipe %c\n",
+				pipe_name(pipe));
+
+		if (active)
+			encoder->get_config(encoder, pipe_config);
+	}
+
+	intel_crtc_compute_pixel_rate(pipe_config);
+
+	if (!new_crtc_state->active)
+		return;
+
+	intel_pipe_config_sanity_check(dev_priv, pipe_config);
+
+	sw_config = to_intel_crtc_state(new_crtc_state);
+	if (!intel_pipe_config_compare(dev_priv, sw_config,
+				       pipe_config, false)) {
+		I915_STATE_WARN(1, "pipe state doesn't match!\n");
+		intel_dump_pipe_config(pipe_config, NULL, "[hw state]");
+		intel_dump_pipe_config(sw_config, NULL, "[sw state]");
+	}
+}
+
+static void
+intel_verify_planes(struct intel_atomic_state *state)
+{
+	struct intel_plane *plane;
+	const struct intel_plane_state *plane_state;
+	int i;
+
+	for_each_new_intel_plane_in_state(state, plane,
+					  plane_state, i)
+		assert_plane(plane, plane_state->slave ||
+			     plane_state->base.visible);
+}
+
+static void
+verify_single_dpll_state(struct drm_i915_private *dev_priv,
+			 struct intel_shared_dpll *pll,
+			 struct drm_crtc *crtc,
+			 struct drm_crtc_state *new_state)
+{
+	struct intel_dpll_hw_state dpll_hw_state;
+	unsigned int crtc_mask;
+	bool active;
+
+	memset(&dpll_hw_state, 0, sizeof(dpll_hw_state));
+
+	DRM_DEBUG_KMS("%s\n", pll->info->name);
+
+	active = pll->info->funcs->get_hw_state(dev_priv, pll, &dpll_hw_state);
+
+	if (!(pll->info->flags & INTEL_DPLL_ALWAYS_ON)) {
+		I915_STATE_WARN(!pll->on && pll->active_mask,
+		     "pll in active use but not on in sw tracking\n");
+		I915_STATE_WARN(pll->on && !pll->active_mask,
+		     "pll is on but not used by any active crtc\n");
+		I915_STATE_WARN(pll->on != active,
+		     "pll on state mismatch (expected %i, found %i)\n",
+		     pll->on, active);
+	}
+
+	if (!crtc) {
+		I915_STATE_WARN(pll->active_mask & ~pll->state.crtc_mask,
+				"more active pll users than references: %x vs %x\n",
+				pll->active_mask, pll->state.crtc_mask);
+
+		return;
+	}
+
+	crtc_mask = drm_crtc_mask(crtc);
+
+	if (new_state->active)
+		I915_STATE_WARN(!(pll->active_mask & crtc_mask),
+				"pll active mismatch (expected pipe %c in active mask 0x%02x)\n",
+				pipe_name(drm_crtc_index(crtc)), pll->active_mask);
+	else
+		I915_STATE_WARN(pll->active_mask & crtc_mask,
+				"pll active mismatch (didn't expect pipe %c in active mask 0x%02x)\n",
+				pipe_name(drm_crtc_index(crtc)), pll->active_mask);
+
+	I915_STATE_WARN(!(pll->state.crtc_mask & crtc_mask),
+			"pll enabled crtcs mismatch (expected 0x%x in 0x%02x)\n",
+			crtc_mask, pll->state.crtc_mask);
+
+	I915_STATE_WARN(pll->on && memcmp(&pll->state.hw_state,
+					  &dpll_hw_state,
+					  sizeof(dpll_hw_state)),
+			"pll hw state mismatch\n");
+}
+
+static void
+verify_shared_dpll_state(struct drm_device *dev, struct drm_crtc *crtc,
+			 struct drm_crtc_state *old_crtc_state,
+			 struct drm_crtc_state *new_crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc_state *old_state = to_intel_crtc_state(old_crtc_state);
+	struct intel_crtc_state *new_state = to_intel_crtc_state(new_crtc_state);
+
+	if (new_state->shared_dpll)
+		verify_single_dpll_state(dev_priv, new_state->shared_dpll, crtc, new_crtc_state);
+
+	if (old_state->shared_dpll &&
+	    old_state->shared_dpll != new_state->shared_dpll) {
+		unsigned int crtc_mask = drm_crtc_mask(crtc);
+		struct intel_shared_dpll *pll = old_state->shared_dpll;
+
+		I915_STATE_WARN(pll->active_mask & crtc_mask,
+				"pll active mismatch (didn't expect pipe %c in active mask)\n",
+				pipe_name(drm_crtc_index(crtc)));
+		I915_STATE_WARN(pll->state.crtc_mask & crtc_mask,
+				"pll enabled crtcs mismatch (found %x in enabled mask)\n",
+				pipe_name(drm_crtc_index(crtc)));
+	}
+}
+
+static void
+intel_modeset_verify_crtc(struct drm_crtc *crtc,
+			  struct drm_atomic_state *state,
+			  struct drm_crtc_state *old_state,
+			  struct drm_crtc_state *new_state)
+{
+	if (!needs_modeset(new_state) &&
+	    !to_intel_crtc_state(new_state)->update_pipe)
+		return;
+
+	verify_wm_state(crtc, new_state);
+	verify_connector_state(crtc->dev, state, crtc);
+	verify_crtc_state(crtc, old_state, new_state);
+	verify_shared_dpll_state(crtc->dev, crtc, old_state, new_state);
+}
+
+static void
+verify_disabled_dpll_state(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int i;
+
+	for (i = 0; i < dev_priv->num_shared_dpll; i++)
+		verify_single_dpll_state(dev_priv, &dev_priv->shared_dplls[i], NULL, NULL);
+}
+
+static void
+intel_modeset_verify_disabled(struct drm_device *dev,
+			      struct drm_atomic_state *state)
+{
+	verify_encoder_state(dev, state);
+	verify_connector_state(dev, state, NULL);
+	verify_disabled_dpll_state(dev);
+}
+
+static void update_scanline_offset(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	/*
+	 * The scanline counter increments at the leading edge of hsync.
+	 *
+	 * On most platforms it starts counting from vtotal-1 on the
+	 * first active line. That means the scanline counter value is
+	 * always one less than what we would expect. Ie. just after
+	 * start of vblank, which also occurs at start of hsync (on the
+	 * last active line), the scanline counter will read vblank_start-1.
+	 *
+	 * On gen2 the scanline counter starts counting from 1 instead
+	 * of vtotal-1, so we have to subtract one (or rather add vtotal-1
+	 * to keep the value positive), instead of adding one.
+	 *
+	 * On HSW+ the behaviour of the scanline counter depends on the output
+	 * type. For DP ports it behaves like most other platforms, but on HDMI
+	 * there's an extra 1 line difference. So we need to add two instead of
+	 * one to the value.
+	 *
+	 * On VLV/CHV DSI the scanline counter would appear to increment
+	 * approx. 1/3 of a scanline before start of vblank. Unfortunately
+	 * that means we can't tell whether we're in vblank or not while
+	 * we're on that particular line. We must still set scanline_offset
+	 * to 1 so that the vblank timestamps come out correct when we query
+	 * the scanline counter from within the vblank interrupt handler.
+	 * However if queried just before the start of vblank we'll get an
+	 * answer that's slightly in the future.
+	 */
+	if (IS_GEN(dev_priv, 2)) {
+		const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode;
+		int vtotal;
+
+		vtotal = adjusted_mode->crtc_vtotal;
+		if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
+			vtotal /= 2;
+
+		crtc->scanline_offset = vtotal - 1;
+	} else if (HAS_DDI(dev_priv) &&
+		   intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
+		crtc->scanline_offset = 2;
+	} else
+		crtc->scanline_offset = 1;
+}
+
+static void intel_modeset_clear_plls(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_crtc *crtc;
+	int i;
+
+	if (!dev_priv->display.crtc_compute_clock)
+		return;
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		struct intel_shared_dpll *old_dpll =
+			old_crtc_state->shared_dpll;
+
+		if (!needs_modeset(&new_crtc_state->base))
+			continue;
+
+		new_crtc_state->shared_dpll = NULL;
+
+		if (!old_dpll)
+			continue;
+
+		intel_release_shared_dpll(old_dpll, crtc, &state->base);
+	}
+}
+
+/*
+ * This implements the workaround described in the "notes" section of the mode
+ * set sequence documentation. When going from no pipes or single pipe to
+ * multiple pipes, and planes are enabled after the pipe, we need to wait at
+ * least 2 vblanks on the first pipe before enabling planes on the second pipe.
+ */
+static int haswell_mode_set_planes_workaround(struct intel_atomic_state *state)
+{
+	struct intel_crtc_state *crtc_state;
+	struct intel_crtc *crtc;
+	struct intel_crtc_state *first_crtc_state = NULL;
+	struct intel_crtc_state *other_crtc_state = NULL;
+	enum pipe first_pipe = INVALID_PIPE, enabled_pipe = INVALID_PIPE;
+	int i;
+
+	/* look at all crtc's that are going to be enabled in during modeset */
+	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+		if (!crtc_state->base.active ||
+		    !needs_modeset(&crtc_state->base))
+			continue;
+
+		if (first_crtc_state) {
+			other_crtc_state = crtc_state;
+			break;
+		} else {
+			first_crtc_state = crtc_state;
+			first_pipe = crtc->pipe;
+		}
+	}
+
+	/* No workaround needed? */
+	if (!first_crtc_state)
+		return 0;
+
+	/* w/a possibly needed, check how many crtc's are already enabled. */
+	for_each_intel_crtc(state->base.dev, crtc) {
+		crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
+		if (IS_ERR(crtc_state))
+			return PTR_ERR(crtc_state);
+
+		crtc_state->hsw_workaround_pipe = INVALID_PIPE;
+
+		if (!crtc_state->base.active ||
+		    needs_modeset(&crtc_state->base))
+			continue;
+
+		/* 2 or more enabled crtcs means no need for w/a */
+		if (enabled_pipe != INVALID_PIPE)
+			return 0;
+
+		enabled_pipe = crtc->pipe;
+	}
+
+	if (enabled_pipe != INVALID_PIPE)
+		first_crtc_state->hsw_workaround_pipe = enabled_pipe;
+	else if (other_crtc_state)
+		other_crtc_state->hsw_workaround_pipe = first_pipe;
+
+	return 0;
+}
+
+static int intel_lock_all_pipes(struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+
+	/* Add all pipes to the state */
+	for_each_crtc(state->dev, crtc) {
+		struct drm_crtc_state *crtc_state;
+
+		crtc_state = drm_atomic_get_crtc_state(state, crtc);
+		if (IS_ERR(crtc_state))
+			return PTR_ERR(crtc_state);
+	}
+
+	return 0;
+}
+
+static int intel_modeset_all_pipes(struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+
+	/*
+	 * Add all pipes to the state, and force
+	 * a modeset on all the active ones.
+	 */
+	for_each_crtc(state->dev, crtc) {
+		struct drm_crtc_state *crtc_state;
+		int ret;
+
+		crtc_state = drm_atomic_get_crtc_state(state, crtc);
+		if (IS_ERR(crtc_state))
+			return PTR_ERR(crtc_state);
+
+		if (!crtc_state->active || needs_modeset(crtc_state))
+			continue;
+
+		crtc_state->mode_changed = true;
+
+		ret = drm_atomic_add_affected_connectors(state, crtc);
+		if (ret)
+			return ret;
+
+		ret = drm_atomic_add_affected_planes(state, crtc);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int intel_modeset_checks(struct intel_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+	struct intel_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_crtc *crtc;
+	int ret = 0, i;
+
+	if (!check_digital_port_conflicts(state)) {
+		DRM_DEBUG_KMS("rejecting conflicting digital port configuration\n");
+		return -EINVAL;
+	}
+
+	/* keep the current setting */
+	if (!state->cdclk.force_min_cdclk_changed)
+		state->cdclk.force_min_cdclk = dev_priv->cdclk.force_min_cdclk;
+
+	state->modeset = true;
+	state->active_crtcs = dev_priv->active_crtcs;
+	state->cdclk.logical = dev_priv->cdclk.logical;
+	state->cdclk.actual = dev_priv->cdclk.actual;
+	state->cdclk.pipe = INVALID_PIPE;
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		if (new_crtc_state->base.active)
+			state->active_crtcs |= 1 << i;
+		else
+			state->active_crtcs &= ~(1 << i);
+
+		if (old_crtc_state->base.active != new_crtc_state->base.active)
+			state->active_pipe_changes |= drm_crtc_mask(&crtc->base);
+	}
+
+	/*
+	 * See if the config requires any additional preparation, e.g.
+	 * to adjust global state with pipes off.  We need to do this
+	 * here so we can get the modeset_pipe updated config for the new
+	 * mode set on this crtc.  For other crtcs we need to use the
+	 * adjusted_mode bits in the crtc directly.
+	 */
+	if (dev_priv->display.modeset_calc_cdclk) {
+		enum pipe pipe;
+
+		ret = dev_priv->display.modeset_calc_cdclk(state);
+		if (ret < 0)
+			return ret;
+
+		/*
+		 * Writes to dev_priv->cdclk.logical must protected by
+		 * holding all the crtc locks, even if we don't end up
+		 * touching the hardware
+		 */
+		if (intel_cdclk_changed(&dev_priv->cdclk.logical,
+					&state->cdclk.logical)) {
+			ret = intel_lock_all_pipes(&state->base);
+			if (ret < 0)
+				return ret;
+		}
+
+		if (is_power_of_2(state->active_crtcs)) {
+			struct drm_crtc *crtc;
+			struct drm_crtc_state *crtc_state;
+
+			pipe = ilog2(state->active_crtcs);
+			crtc = &intel_get_crtc_for_pipe(dev_priv, pipe)->base;
+			crtc_state = drm_atomic_get_new_crtc_state(&state->base, crtc);
+			if (crtc_state && needs_modeset(crtc_state))
+				pipe = INVALID_PIPE;
+		} else {
+			pipe = INVALID_PIPE;
+		}
+
+		/* All pipes must be switched off while we change the cdclk. */
+		if (pipe != INVALID_PIPE &&
+		    intel_cdclk_needs_cd2x_update(dev_priv,
+						  &dev_priv->cdclk.actual,
+						  &state->cdclk.actual)) {
+			ret = intel_lock_all_pipes(&state->base);
+			if (ret < 0)
+				return ret;
+
+			state->cdclk.pipe = pipe;
+		} else if (intel_cdclk_needs_modeset(&dev_priv->cdclk.actual,
+						     &state->cdclk.actual)) {
+			ret = intel_modeset_all_pipes(&state->base);
+			if (ret < 0)
+				return ret;
+
+			state->cdclk.pipe = INVALID_PIPE;
+		}
+
+		DRM_DEBUG_KMS("New cdclk calculated to be logical %u kHz, actual %u kHz\n",
+			      state->cdclk.logical.cdclk,
+			      state->cdclk.actual.cdclk);
+		DRM_DEBUG_KMS("New voltage level calculated to be logical %u, actual %u\n",
+			      state->cdclk.logical.voltage_level,
+			      state->cdclk.actual.voltage_level);
+	}
+
+	intel_modeset_clear_plls(state);
+
+	if (IS_HASWELL(dev_priv))
+		return haswell_mode_set_planes_workaround(state);
+
+	return 0;
+}
+
+/*
+ * Handle calculation of various watermark data at the end of the atomic check
+ * phase.  The code here should be run after the per-crtc and per-plane 'check'
+ * handlers to ensure that all derived state has been updated.
+ */
+static int calc_watermark_data(struct intel_atomic_state *state)
+{
+	struct drm_device *dev = state->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	/* Is there platform-specific watermark information to calculate? */
+	if (dev_priv->display.compute_global_watermarks)
+		return dev_priv->display.compute_global_watermarks(state);
+
+	return 0;
+}
+
+/**
+ * intel_atomic_check - validate state object
+ * @dev: drm device
+ * @_state: state to validate
+ */
+static int intel_atomic_check(struct drm_device *dev,
+			      struct drm_atomic_state *_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_atomic_state *state = to_intel_atomic_state(_state);
+	struct intel_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_crtc *crtc;
+	int ret, i;
+	bool any_ms = state->cdclk.force_min_cdclk_changed;
+
+	/* Catch I915_MODE_FLAG_INHERITED */
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		if (new_crtc_state->base.mode.private_flags !=
+		    old_crtc_state->base.mode.private_flags)
+			new_crtc_state->base.mode_changed = true;
+	}
+
+	ret = drm_atomic_helper_check_modeset(dev, &state->base);
+	if (ret)
+		goto fail;
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		if (!needs_modeset(&new_crtc_state->base))
+			continue;
+
+		if (!new_crtc_state->base.enable) {
+			any_ms = true;
+			continue;
+		}
+
+		ret = intel_modeset_pipe_config(new_crtc_state);
+		if (ret)
+			goto fail;
+
+		if (intel_pipe_config_compare(dev_priv, old_crtc_state,
+					      new_crtc_state, true)) {
+			new_crtc_state->base.mode_changed = false;
+			new_crtc_state->update_pipe = true;
+		}
+
+		if (needs_modeset(&new_crtc_state->base))
+			any_ms = true;
+	}
+
+	ret = drm_dp_mst_atomic_check(&state->base);
+	if (ret)
+		goto fail;
+
+	if (any_ms) {
+		ret = intel_modeset_checks(state);
+		if (ret)
+			goto fail;
+	} else {
+		state->cdclk.logical = dev_priv->cdclk.logical;
+	}
+
+	ret = icl_add_linked_planes(state);
+	if (ret)
+		goto fail;
+
+	ret = drm_atomic_helper_check_planes(dev, &state->base);
+	if (ret)
+		goto fail;
+
+	intel_fbc_choose_crtc(dev_priv, state);
+	ret = calc_watermark_data(state);
+	if (ret)
+		goto fail;
+
+	ret = intel_bw_atomic_check(state);
+	if (ret)
+		goto fail;
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		if (!needs_modeset(&new_crtc_state->base) &&
+		    !new_crtc_state->update_pipe)
+			continue;
+
+		intel_dump_pipe_config(new_crtc_state, state,
+				       needs_modeset(&new_crtc_state->base) ?
+				       "[modeset]" : "[fastset]");
+	}
+
+	return 0;
+
+ fail:
+	if (ret == -EDEADLK)
+		return ret;
+
+	/*
+	 * FIXME would probably be nice to know which crtc specifically
+	 * caused the failure, in cases where we can pinpoint it.
+	 */
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i)
+		intel_dump_pipe_config(new_crtc_state, state, "[failed]");
+
+	return ret;
+}
+
+static int intel_atomic_prepare_commit(struct drm_device *dev,
+				       struct drm_atomic_state *state)
+{
+	return drm_atomic_helper_prepare_planes(dev, state);
+}
+
+u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_vblank_crtc *vblank = &dev->vblank[drm_crtc_index(&crtc->base)];
+
+	if (!vblank->max_vblank_count)
+		return (u32)drm_crtc_accurate_vblank_count(&crtc->base);
+
+	return dev->driver->get_vblank_counter(dev, crtc->pipe);
+}
+
+static void intel_update_crtc(struct drm_crtc *crtc,
+			      struct drm_atomic_state *state,
+			      struct drm_crtc_state *old_crtc_state,
+			      struct drm_crtc_state *new_crtc_state)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	struct intel_crtc_state *pipe_config = to_intel_crtc_state(new_crtc_state);
+	bool modeset = needs_modeset(new_crtc_state);
+	struct intel_plane_state *new_plane_state =
+		intel_atomic_get_new_plane_state(to_intel_atomic_state(state),
+						 to_intel_plane(crtc->primary));
+
+	if (modeset) {
+		update_scanline_offset(pipe_config);
+		dev_priv->display.crtc_enable(pipe_config, state);
+
+		/* vblanks work again, re-enable pipe CRC. */
+		intel_crtc_enable_pipe_crc(intel_crtc);
+	} else {
+		intel_pre_plane_update(to_intel_crtc_state(old_crtc_state),
+				       pipe_config);
+
+		if (pipe_config->update_pipe)
+			intel_encoders_update_pipe(crtc, pipe_config, state);
+	}
+
+	if (pipe_config->update_pipe && !pipe_config->enable_fbc)
+		intel_fbc_disable(intel_crtc);
+	else if (new_plane_state)
+		intel_fbc_enable(intel_crtc, pipe_config, new_plane_state);
+
+	intel_begin_crtc_commit(to_intel_atomic_state(state), intel_crtc);
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		skl_update_planes_on_crtc(to_intel_atomic_state(state), intel_crtc);
+	else
+		i9xx_update_planes_on_crtc(to_intel_atomic_state(state), intel_crtc);
+
+	intel_finish_crtc_commit(to_intel_atomic_state(state), intel_crtc);
+}
+
+static void intel_update_crtcs(struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
+	int i;
+
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
+		if (!new_crtc_state->active)
+			continue;
+
+		intel_update_crtc(crtc, state, old_crtc_state,
+				  new_crtc_state);
+	}
+}
+
+static void skl_update_crtcs(struct drm_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->dev);
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+	struct drm_crtc *crtc;
+	struct intel_crtc *intel_crtc;
+	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_crtc_state *cstate;
+	unsigned int updated = 0;
+	bool progress;
+	enum pipe pipe;
+	int i;
+	u8 hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices;
+	u8 required_slices = intel_state->wm_results.ddb.enabled_slices;
+	struct skl_ddb_entry entries[I915_MAX_PIPES] = {};
+
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i)
+		/* ignore allocations for crtc's that have been turned off. */
+		if (new_crtc_state->active)
+			entries[i] = to_intel_crtc_state(old_crtc_state)->wm.skl.ddb;
+
+	/* If 2nd DBuf slice required, enable it here */
+	if (INTEL_GEN(dev_priv) >= 11 && required_slices > hw_enabled_slices)
+		icl_dbuf_slices_update(dev_priv, required_slices);
+
+	/*
+	 * Whenever the number of active pipes changes, we need to make sure we
+	 * update the pipes in the right order so that their ddb allocations
+	 * never overlap with eachother inbetween CRTC updates. Otherwise we'll
+	 * cause pipe underruns and other bad stuff.
+	 */
+	do {
+		progress = false;
+
+		for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
+			bool vbl_wait = false;
+			unsigned int cmask = drm_crtc_mask(crtc);
+
+			intel_crtc = to_intel_crtc(crtc);
+			cstate = to_intel_crtc_state(new_crtc_state);
+			pipe = intel_crtc->pipe;
+
+			if (updated & cmask || !cstate->base.active)
+				continue;
+
+			if (skl_ddb_allocation_overlaps(&cstate->wm.skl.ddb,
+							entries,
+							INTEL_INFO(dev_priv)->num_pipes, i))
+				continue;
+
+			updated |= cmask;
+			entries[i] = cstate->wm.skl.ddb;
+
+			/*
+			 * If this is an already active pipe, it's DDB changed,
+			 * and this isn't the last pipe that needs updating
+			 * then we need to wait for a vblank to pass for the
+			 * new ddb allocation to take effect.
+			 */
+			if (!skl_ddb_entry_equal(&cstate->wm.skl.ddb,
+						 &to_intel_crtc_state(old_crtc_state)->wm.skl.ddb) &&
+			    !new_crtc_state->active_changed &&
+			    intel_state->wm_results.dirty_pipes != updated)
+				vbl_wait = true;
+
+			intel_update_crtc(crtc, state, old_crtc_state,
+					  new_crtc_state);
+
+			if (vbl_wait)
+				intel_wait_for_vblank(dev_priv, pipe);
+
+			progress = true;
+		}
+	} while (progress);
+
+	/* If 2nd DBuf slice is no more required disable it */
+	if (INTEL_GEN(dev_priv) >= 11 && required_slices < hw_enabled_slices)
+		icl_dbuf_slices_update(dev_priv, required_slices);
+}
+
+static void intel_atomic_helper_free_state(struct drm_i915_private *dev_priv)
+{
+	struct intel_atomic_state *state, *next;
+	struct llist_node *freed;
+
+	freed = llist_del_all(&dev_priv->atomic_helper.free_list);
+	llist_for_each_entry_safe(state, next, freed, freed)
+		drm_atomic_state_put(&state->base);
+}
+
+static void intel_atomic_helper_free_state_worker(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, typeof(*dev_priv), atomic_helper.free_work);
+
+	intel_atomic_helper_free_state(dev_priv);
+}
+
+static void intel_atomic_commit_fence_wait(struct intel_atomic_state *intel_state)
+{
+	struct wait_queue_entry wait_fence, wait_reset;
+	struct drm_i915_private *dev_priv = to_i915(intel_state->base.dev);
+
+	init_wait_entry(&wait_fence, 0);
+	init_wait_entry(&wait_reset, 0);
+	for (;;) {
+		prepare_to_wait(&intel_state->commit_ready.wait,
+				&wait_fence, TASK_UNINTERRUPTIBLE);
+		prepare_to_wait(&dev_priv->gpu_error.wait_queue,
+				&wait_reset, TASK_UNINTERRUPTIBLE);
+
+
+		if (i915_sw_fence_done(&intel_state->commit_ready)
+		    || test_bit(I915_RESET_MODESET, &dev_priv->gpu_error.flags))
+			break;
+
+		schedule();
+	}
+	finish_wait(&intel_state->commit_ready.wait, &wait_fence);
+	finish_wait(&dev_priv->gpu_error.wait_queue, &wait_reset);
+}
+
+static void intel_atomic_cleanup_work(struct work_struct *work)
+{
+	struct drm_atomic_state *state =
+		container_of(work, struct drm_atomic_state, commit_work);
+	struct drm_i915_private *i915 = to_i915(state->dev);
+
+	drm_atomic_helper_cleanup_planes(&i915->drm, state);
+	drm_atomic_helper_commit_cleanup_done(state);
+	drm_atomic_state_put(state);
+
+	intel_atomic_helper_free_state(i915);
+}
+
+static void intel_atomic_commit_tail(struct drm_atomic_state *state)
+{
+	struct drm_device *dev = state->dev;
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_crtc_state *new_intel_crtc_state, *old_intel_crtc_state;
+	struct drm_crtc *crtc;
+	struct intel_crtc *intel_crtc;
+	u64 put_domains[I915_MAX_PIPES] = {};
+	intel_wakeref_t wakeref = 0;
+	int i;
+
+	intel_atomic_commit_fence_wait(intel_state);
+
+	drm_atomic_helper_wait_for_dependencies(state);
+
+	if (intel_state->modeset)
+		wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_MODESET);
+
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
+		old_intel_crtc_state = to_intel_crtc_state(old_crtc_state);
+		new_intel_crtc_state = to_intel_crtc_state(new_crtc_state);
+		intel_crtc = to_intel_crtc(crtc);
+
+		if (needs_modeset(new_crtc_state) ||
+		    to_intel_crtc_state(new_crtc_state)->update_pipe) {
+
+			put_domains[intel_crtc->pipe] =
+				modeset_get_crtc_power_domains(crtc,
+					new_intel_crtc_state);
+		}
+
+		if (!needs_modeset(new_crtc_state))
+			continue;
+
+		intel_pre_plane_update(old_intel_crtc_state, new_intel_crtc_state);
+
+		if (old_crtc_state->active) {
+			intel_crtc_disable_planes(intel_state, intel_crtc);
+
+			/*
+			 * We need to disable pipe CRC before disabling the pipe,
+			 * or we race against vblank off.
+			 */
+			intel_crtc_disable_pipe_crc(intel_crtc);
+
+			dev_priv->display.crtc_disable(old_intel_crtc_state, state);
+			intel_crtc->active = false;
+			intel_fbc_disable(intel_crtc);
+			intel_disable_shared_dpll(old_intel_crtc_state);
+
+			/*
+			 * Underruns don't always raise
+			 * interrupts, so check manually.
+			 */
+			intel_check_cpu_fifo_underruns(dev_priv);
+			intel_check_pch_fifo_underruns(dev_priv);
+
+			/* FIXME unify this for all platforms */
+			if (!new_crtc_state->active &&
+			    !HAS_GMCH(dev_priv) &&
+			    dev_priv->display.initial_watermarks)
+				dev_priv->display.initial_watermarks(intel_state,
+								     new_intel_crtc_state);
+		}
+	}
+
+	/* FIXME: Eventually get rid of our intel_crtc->config pointer */
+	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i)
+		to_intel_crtc(crtc)->config = to_intel_crtc_state(new_crtc_state);
+
+	if (intel_state->modeset) {
+		drm_atomic_helper_update_legacy_modeset_state(state->dev, state);
+
+		intel_set_cdclk_pre_plane_update(dev_priv,
+						 &intel_state->cdclk.actual,
+						 &dev_priv->cdclk.actual,
+						 intel_state->cdclk.pipe);
+
+		/*
+		 * SKL workaround: bspec recommends we disable the SAGV when we
+		 * have more then one pipe enabled
+		 */
+		if (!intel_can_enable_sagv(state))
+			intel_disable_sagv(dev_priv);
+
+		intel_modeset_verify_disabled(dev, state);
+	}
+
+	/* Complete the events for pipes that have now been disabled */
+	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
+		bool modeset = needs_modeset(new_crtc_state);
+
+		/* Complete events for now disable pipes here. */
+		if (modeset && !new_crtc_state->active && new_crtc_state->event) {
+			spin_lock_irq(&dev->event_lock);
+			drm_crtc_send_vblank_event(crtc, new_crtc_state->event);
+			spin_unlock_irq(&dev->event_lock);
+
+			new_crtc_state->event = NULL;
+		}
+	}
+
+	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
+	dev_priv->display.update_crtcs(state);
+
+	if (intel_state->modeset)
+		intel_set_cdclk_post_plane_update(dev_priv,
+						  &intel_state->cdclk.actual,
+						  &dev_priv->cdclk.actual,
+						  intel_state->cdclk.pipe);
+
+	/* FIXME: We should call drm_atomic_helper_commit_hw_done() here
+	 * already, but still need the state for the delayed optimization. To
+	 * fix this:
+	 * - wrap the optimization/post_plane_update stuff into a per-crtc work.
+	 * - schedule that vblank worker _before_ calling hw_done
+	 * - at the start of commit_tail, cancel it _synchrously
+	 * - switch over to the vblank wait helper in the core after that since
+	 *   we don't need out special handling any more.
+	 */
+	drm_atomic_helper_wait_for_flip_done(dev, state);
+
+	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
+		new_intel_crtc_state = to_intel_crtc_state(new_crtc_state);
+
+		if (new_crtc_state->active &&
+		    !needs_modeset(new_crtc_state) &&
+		    (new_intel_crtc_state->base.color_mgmt_changed ||
+		     new_intel_crtc_state->update_pipe))
+			intel_color_load_luts(new_intel_crtc_state);
+	}
+
+	/*
+	 * Now that the vblank has passed, we can go ahead and program the
+	 * optimal watermarks on platforms that need two-step watermark
+	 * programming.
+	 *
+	 * TODO: Move this (and other cleanup) to an async worker eventually.
+	 */
+	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
+		new_intel_crtc_state = to_intel_crtc_state(new_crtc_state);
+
+		if (dev_priv->display.optimize_watermarks)
+			dev_priv->display.optimize_watermarks(intel_state,
+							      new_intel_crtc_state);
+	}
+
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
+		intel_post_plane_update(to_intel_crtc_state(old_crtc_state));
+
+		if (put_domains[i])
+			modeset_put_power_domains(dev_priv, put_domains[i]);
+
+		intel_modeset_verify_crtc(crtc, state, old_crtc_state, new_crtc_state);
+	}
+
+	if (intel_state->modeset)
+		intel_verify_planes(intel_state);
+
+	if (intel_state->modeset && intel_can_enable_sagv(state))
+		intel_enable_sagv(dev_priv);
+
+	drm_atomic_helper_commit_hw_done(state);
+
+	if (intel_state->modeset) {
+		/* As one of the primary mmio accessors, KMS has a high
+		 * likelihood of triggering bugs in unclaimed access. After we
+		 * finish modesetting, see if an error has been flagged, and if
+		 * so enable debugging for the next modeset - and hope we catch
+		 * the culprit.
+		 */
+		intel_uncore_arm_unclaimed_mmio_detection(&dev_priv->uncore);
+		intel_display_power_put(dev_priv, POWER_DOMAIN_MODESET, wakeref);
+	}
+	intel_runtime_pm_put(&dev_priv->runtime_pm, intel_state->wakeref);
+
+	/*
+	 * Defer the cleanup of the old state to a separate worker to not
+	 * impede the current task (userspace for blocking modesets) that
+	 * are executed inline. For out-of-line asynchronous modesets/flips,
+	 * deferring to a new worker seems overkill, but we would place a
+	 * schedule point (cond_resched()) here anyway to keep latencies
+	 * down.
+	 */
+	INIT_WORK(&state->commit_work, intel_atomic_cleanup_work);
+	queue_work(system_highpri_wq, &state->commit_work);
+}
+
+static void intel_atomic_commit_work(struct work_struct *work)
+{
+	struct drm_atomic_state *state =
+		container_of(work, struct drm_atomic_state, commit_work);
+
+	intel_atomic_commit_tail(state);
+}
+
+static int __i915_sw_fence_call
+intel_atomic_commit_ready(struct i915_sw_fence *fence,
+			  enum i915_sw_fence_notify notify)
+{
+	struct intel_atomic_state *state =
+		container_of(fence, struct intel_atomic_state, commit_ready);
+
+	switch (notify) {
+	case FENCE_COMPLETE:
+		/* we do blocking waits in the worker, nothing to do here */
+		break;
+	case FENCE_FREE:
+		{
+			struct intel_atomic_helper *helper =
+				&to_i915(state->base.dev)->atomic_helper;
+
+			if (llist_add(&state->freed, &helper->free_list))
+				schedule_work(&helper->free_work);
+			break;
+		}
+	}
+
+	return NOTIFY_DONE;
+}
+
+static void intel_atomic_track_fbs(struct drm_atomic_state *state)
+{
+	struct drm_plane_state *old_plane_state, *new_plane_state;
+	struct drm_plane *plane;
+	int i;
+
+	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i)
+		i915_gem_track_fb(intel_fb_obj(old_plane_state->fb),
+				  intel_fb_obj(new_plane_state->fb),
+				  to_intel_plane(plane)->frontbuffer_bit);
+}
+
+/**
+ * intel_atomic_commit - commit validated state object
+ * @dev: DRM device
+ * @state: the top-level driver state object
+ * @nonblock: nonblocking commit
+ *
+ * This function commits a top-level state object that has been validated
+ * with drm_atomic_helper_check().
+ *
+ * RETURNS
+ * Zero for success or -errno.
+ */
+static int intel_atomic_commit(struct drm_device *dev,
+			       struct drm_atomic_state *state,
+			       bool nonblock)
+{
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int ret = 0;
+
+	intel_state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
+
+	drm_atomic_state_get(state);
+	i915_sw_fence_init(&intel_state->commit_ready,
+			   intel_atomic_commit_ready);
+
+	/*
+	 * The intel_legacy_cursor_update() fast path takes care
+	 * of avoiding the vblank waits for simple cursor
+	 * movement and flips. For cursor on/off and size changes,
+	 * we want to perform the vblank waits so that watermark
+	 * updates happen during the correct frames. Gen9+ have
+	 * double buffered watermarks and so shouldn't need this.
+	 *
+	 * Unset state->legacy_cursor_update before the call to
+	 * drm_atomic_helper_setup_commit() because otherwise
+	 * drm_atomic_helper_wait_for_flip_done() is a noop and
+	 * we get FIFO underruns because we didn't wait
+	 * for vblank.
+	 *
+	 * FIXME doing watermarks and fb cleanup from a vblank worker
+	 * (assuming we had any) would solve these problems.
+	 */
+	if (INTEL_GEN(dev_priv) < 9 && state->legacy_cursor_update) {
+		struct intel_crtc_state *new_crtc_state;
+		struct intel_crtc *crtc;
+		int i;
+
+		for_each_new_intel_crtc_in_state(intel_state, crtc, new_crtc_state, i)
+			if (new_crtc_state->wm.need_postvbl_update ||
+			    new_crtc_state->update_wm_post)
+				state->legacy_cursor_update = false;
+	}
+
+	ret = intel_atomic_prepare_commit(dev, state);
+	if (ret) {
+		DRM_DEBUG_ATOMIC("Preparing state failed with %i\n", ret);
+		i915_sw_fence_commit(&intel_state->commit_ready);
+		intel_runtime_pm_put(&dev_priv->runtime_pm, intel_state->wakeref);
+		return ret;
+	}
+
+	ret = drm_atomic_helper_setup_commit(state, nonblock);
+	if (!ret)
+		ret = drm_atomic_helper_swap_state(state, true);
+
+	if (ret) {
+		i915_sw_fence_commit(&intel_state->commit_ready);
+
+		drm_atomic_helper_cleanup_planes(dev, state);
+		intel_runtime_pm_put(&dev_priv->runtime_pm, intel_state->wakeref);
+		return ret;
+	}
+	dev_priv->wm.distrust_bios_wm = false;
+	intel_shared_dpll_swap_state(state);
+	intel_atomic_track_fbs(state);
+
+	if (intel_state->modeset) {
+		memcpy(dev_priv->min_cdclk, intel_state->min_cdclk,
+		       sizeof(intel_state->min_cdclk));
+		memcpy(dev_priv->min_voltage_level,
+		       intel_state->min_voltage_level,
+		       sizeof(intel_state->min_voltage_level));
+		dev_priv->active_crtcs = intel_state->active_crtcs;
+		dev_priv->cdclk.force_min_cdclk =
+			intel_state->cdclk.force_min_cdclk;
+
+		intel_cdclk_swap_state(intel_state);
+	}
+
+	drm_atomic_state_get(state);
+	INIT_WORK(&state->commit_work, intel_atomic_commit_work);
+
+	i915_sw_fence_commit(&intel_state->commit_ready);
+	if (nonblock && intel_state->modeset) {
+		queue_work(dev_priv->modeset_wq, &state->commit_work);
+	} else if (nonblock) {
+		queue_work(system_unbound_wq, &state->commit_work);
+	} else {
+		if (intel_state->modeset)
+			flush_workqueue(dev_priv->modeset_wq);
+		intel_atomic_commit_tail(state);
+	}
+
+	return 0;
+}
+
+static const struct drm_crtc_funcs intel_crtc_funcs = {
+	.gamma_set = drm_atomic_helper_legacy_gamma_set,
+	.set_config = drm_atomic_helper_set_config,
+	.destroy = intel_crtc_destroy,
+	.page_flip = drm_atomic_helper_page_flip,
+	.atomic_duplicate_state = intel_crtc_duplicate_state,
+	.atomic_destroy_state = intel_crtc_destroy_state,
+	.set_crc_source = intel_crtc_set_crc_source,
+	.verify_crc_source = intel_crtc_verify_crc_source,
+	.get_crc_sources = intel_crtc_get_crc_sources,
+};
+
+struct wait_rps_boost {
+	struct wait_queue_entry wait;
+
+	struct drm_crtc *crtc;
+	struct i915_request *request;
+};
+
+static int do_rps_boost(struct wait_queue_entry *_wait,
+			unsigned mode, int sync, void *key)
+{
+	struct wait_rps_boost *wait = container_of(_wait, typeof(*wait), wait);
+	struct i915_request *rq = wait->request;
+
+	/*
+	 * If we missed the vblank, but the request is already running it
+	 * is reasonable to assume that it will complete before the next
+	 * vblank without our intervention, so leave RPS alone.
+	 */
+	if (!i915_request_started(rq))
+		gen6_rps_boost(rq);
+	i915_request_put(rq);
+
+	drm_crtc_vblank_put(wait->crtc);
+
+	list_del(&wait->wait.entry);
+	kfree(wait);
+	return 1;
+}
+
+static void add_rps_boost_after_vblank(struct drm_crtc *crtc,
+				       struct dma_fence *fence)
+{
+	struct wait_rps_boost *wait;
+
+	if (!dma_fence_is_i915(fence))
+		return;
+
+	if (INTEL_GEN(to_i915(crtc->dev)) < 6)
+		return;
+
+	if (drm_crtc_vblank_get(crtc))
+		return;
+
+	wait = kmalloc(sizeof(*wait), GFP_KERNEL);
+	if (!wait) {
+		drm_crtc_vblank_put(crtc);
+		return;
+	}
+
+	wait->request = to_request(dma_fence_get(fence));
+	wait->crtc = crtc;
+
+	wait->wait.func = do_rps_boost;
+	wait->wait.flags = 0;
+
+	add_wait_queue(drm_crtc_vblank_waitqueue(crtc), &wait->wait);
+}
+
+static int intel_plane_pin_fb(struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	struct drm_framebuffer *fb = plane_state->base.fb;
+	struct i915_vma *vma;
+
+	if (plane->id == PLANE_CURSOR &&
+	    INTEL_INFO(dev_priv)->display.cursor_needs_physical) {
+		struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+		const int align = intel_cursor_alignment(dev_priv);
+		int err;
+
+		err = i915_gem_object_attach_phys(obj, align);
+		if (err)
+			return err;
+	}
+
+	vma = intel_pin_and_fence_fb_obj(fb,
+					 &plane_state->view,
+					 intel_plane_uses_fence(plane_state),
+					 &plane_state->flags);
+	if (IS_ERR(vma))
+		return PTR_ERR(vma);
+
+	plane_state->vma = vma;
+
+	return 0;
+}
+
+static void intel_plane_unpin_fb(struct intel_plane_state *old_plane_state)
+{
+	struct i915_vma *vma;
+
+	vma = fetch_and_zero(&old_plane_state->vma);
+	if (vma)
+		intel_unpin_fb_vma(vma, old_plane_state->flags);
+}
+
+static void fb_obj_bump_render_priority(struct drm_i915_gem_object *obj)
+{
+	struct i915_sched_attr attr = {
+		.priority = I915_PRIORITY_DISPLAY,
+	};
+
+	i915_gem_object_wait_priority(obj, 0, &attr);
+}
+
+/**
+ * intel_prepare_plane_fb - Prepare fb for usage on plane
+ * @plane: drm plane to prepare for
+ * @new_state: the plane state being prepared
+ *
+ * Prepares a framebuffer for usage on a display plane.  Generally this
+ * involves pinning the underlying object and updating the frontbuffer tracking
+ * bits.  Some older platforms need special physical address handling for
+ * cursor planes.
+ *
+ * Must be called with struct_mutex held.
+ *
+ * Returns 0 on success, negative error code on failure.
+ */
+int
+intel_prepare_plane_fb(struct drm_plane *plane,
+		       struct drm_plane_state *new_state)
+{
+	struct intel_atomic_state *intel_state =
+		to_intel_atomic_state(new_state->state);
+	struct drm_i915_private *dev_priv = to_i915(plane->dev);
+	struct drm_framebuffer *fb = new_state->fb;
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->state->fb);
+	int ret;
+
+	if (old_obj) {
+		struct drm_crtc_state *crtc_state =
+			drm_atomic_get_new_crtc_state(new_state->state,
+						      plane->state->crtc);
+
+		/* Big Hammer, we also need to ensure that any pending
+		 * MI_WAIT_FOR_EVENT inside a user batch buffer on the
+		 * current scanout is retired before unpinning the old
+		 * framebuffer. Note that we rely on userspace rendering
+		 * into the buffer attached to the pipe they are waiting
+		 * on. If not, userspace generates a GPU hang with IPEHR
+		 * point to the MI_WAIT_FOR_EVENT.
+		 *
+		 * This should only fail upon a hung GPU, in which case we
+		 * can safely continue.
+		 */
+		if (needs_modeset(crtc_state)) {
+			ret = i915_sw_fence_await_reservation(&intel_state->commit_ready,
+							      old_obj->resv, NULL,
+							      false, 0,
+							      GFP_KERNEL);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	if (new_state->fence) { /* explicit fencing */
+		ret = i915_sw_fence_await_dma_fence(&intel_state->commit_ready,
+						    new_state->fence,
+						    I915_FENCE_TIMEOUT,
+						    GFP_KERNEL);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (!obj)
+		return 0;
+
+	ret = i915_gem_object_pin_pages(obj);
+	if (ret)
+		return ret;
+
+	ret = mutex_lock_interruptible(&dev_priv->drm.struct_mutex);
+	if (ret) {
+		i915_gem_object_unpin_pages(obj);
+		return ret;
+	}
+
+	ret = intel_plane_pin_fb(to_intel_plane_state(new_state));
+
+	mutex_unlock(&dev_priv->drm.struct_mutex);
+	i915_gem_object_unpin_pages(obj);
+	if (ret)
+		return ret;
+
+	fb_obj_bump_render_priority(obj);
+	intel_fb_obj_flush(obj, ORIGIN_DIRTYFB);
+
+	if (!new_state->fence) { /* implicit fencing */
+		struct dma_fence *fence;
+
+		ret = i915_sw_fence_await_reservation(&intel_state->commit_ready,
+						      obj->resv, NULL,
+						      false, I915_FENCE_TIMEOUT,
+						      GFP_KERNEL);
+		if (ret < 0)
+			return ret;
+
+		fence = reservation_object_get_excl_rcu(obj->resv);
+		if (fence) {
+			add_rps_boost_after_vblank(new_state->crtc, fence);
+			dma_fence_put(fence);
+		}
+	} else {
+		add_rps_boost_after_vblank(new_state->crtc, new_state->fence);
+	}
+
+	/*
+	 * We declare pageflips to be interactive and so merit a small bias
+	 * towards upclocking to deliver the frame on time. By only changing
+	 * the RPS thresholds to sample more regularly and aim for higher
+	 * clocks we can hopefully deliver low power workloads (like kodi)
+	 * that are not quite steady state without resorting to forcing
+	 * maximum clocks following a vblank miss (see do_rps_boost()).
+	 */
+	if (!intel_state->rps_interactive) {
+		intel_rps_mark_interactive(dev_priv, true);
+		intel_state->rps_interactive = true;
+	}
+
+	return 0;
+}
+
+/**
+ * intel_cleanup_plane_fb - Cleans up an fb after plane use
+ * @plane: drm plane to clean up for
+ * @old_state: the state from the previous modeset
+ *
+ * Cleans up a framebuffer that has just been removed from a plane.
+ *
+ * Must be called with struct_mutex held.
+ */
+void
+intel_cleanup_plane_fb(struct drm_plane *plane,
+		       struct drm_plane_state *old_state)
+{
+	struct intel_atomic_state *intel_state =
+		to_intel_atomic_state(old_state->state);
+	struct drm_i915_private *dev_priv = to_i915(plane->dev);
+
+	if (intel_state->rps_interactive) {
+		intel_rps_mark_interactive(dev_priv, false);
+		intel_state->rps_interactive = false;
+	}
+
+	/* Should only be called after a successful intel_prepare_plane_fb()! */
+	mutex_lock(&dev_priv->drm.struct_mutex);
+	intel_plane_unpin_fb(to_intel_plane_state(old_state));
+	mutex_unlock(&dev_priv->drm.struct_mutex);
+}
+
+int
+skl_max_scale(const struct intel_crtc_state *crtc_state,
+	      u32 pixel_format)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	int max_scale, mult;
+	int crtc_clock, max_dotclk, tmpclk1, tmpclk2;
+
+	if (!crtc_state->base.enable)
+		return DRM_PLANE_HELPER_NO_SCALING;
+
+	crtc_clock = crtc_state->base.adjusted_mode.crtc_clock;
+	max_dotclk = to_intel_atomic_state(crtc_state->base.state)->cdclk.logical.cdclk;
+
+	if (IS_GEMINILAKE(dev_priv) || INTEL_GEN(dev_priv) >= 10)
+		max_dotclk *= 2;
+
+	if (WARN_ON_ONCE(!crtc_clock || max_dotclk < crtc_clock))
+		return DRM_PLANE_HELPER_NO_SCALING;
+
+	/*
+	 * skl max scale is lower of:
+	 *    close to 3 but not 3, -1 is for that purpose
+	 *            or
+	 *    cdclk/crtc_clock
+	 */
+	mult = is_planar_yuv_format(pixel_format) ? 2 : 3;
+	tmpclk1 = (1 << 16) * mult - 1;
+	tmpclk2 = (1 << 8) * ((max_dotclk << 8) / crtc_clock);
+	max_scale = min(tmpclk1, tmpclk2);
+
+	return max_scale;
+}
+
+static void intel_begin_crtc_commit(struct intel_atomic_state *state,
+				    struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_crtc_state *old_crtc_state =
+		intel_atomic_get_old_crtc_state(state, crtc);
+	struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	bool modeset = needs_modeset(&new_crtc_state->base);
+
+	/* Perform vblank evasion around commit operation */
+	intel_pipe_update_start(new_crtc_state);
+
+	if (modeset)
+		goto out;
+
+	if (new_crtc_state->base.color_mgmt_changed ||
+	    new_crtc_state->update_pipe)
+		intel_color_commit(new_crtc_state);
+
+	if (new_crtc_state->update_pipe)
+		intel_update_pipe_config(old_crtc_state, new_crtc_state);
+	else if (INTEL_GEN(dev_priv) >= 9)
+		skl_detach_scalers(new_crtc_state);
+
+	if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
+		bdw_set_pipemisc(new_crtc_state);
+
+out:
+	if (dev_priv->display.atomic_update_watermarks)
+		dev_priv->display.atomic_update_watermarks(state,
+							   new_crtc_state);
+}
+
+void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
+				  struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (!IS_GEN(dev_priv, 2))
+		intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
+
+	if (crtc_state->has_pch_encoder) {
+		enum pipe pch_transcoder =
+			intel_crtc_pch_transcoder(crtc);
+
+		intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder, true);
+	}
+}
+
+static void intel_finish_crtc_commit(struct intel_atomic_state *state,
+				     struct intel_crtc *crtc)
+{
+	struct intel_crtc_state *old_crtc_state =
+		intel_atomic_get_old_crtc_state(state, crtc);
+	struct intel_crtc_state *new_crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+
+	intel_pipe_update_end(new_crtc_state);
+
+	if (new_crtc_state->update_pipe &&
+	    !needs_modeset(&new_crtc_state->base) &&
+	    old_crtc_state->base.mode.private_flags & I915_MODE_FLAG_INHERITED)
+		intel_crtc_arm_fifo_underrun(crtc, new_crtc_state);
+}
+
+/**
+ * intel_plane_destroy - destroy a plane
+ * @plane: plane to destroy
+ *
+ * Common destruction function for all types of planes (primary, cursor,
+ * sprite).
+ */
+void intel_plane_destroy(struct drm_plane *plane)
+{
+	drm_plane_cleanup(plane);
+	kfree(to_intel_plane(plane));
+}
+
+static bool i8xx_plane_format_mod_supported(struct drm_plane *_plane,
+					    u32 format, u64 modifier)
+{
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		break;
+	default:
+		return false;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_C8:
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB1555:
+	case DRM_FORMAT_XRGB8888:
+		return modifier == DRM_FORMAT_MOD_LINEAR ||
+			modifier == I915_FORMAT_MOD_X_TILED;
+	default:
+		return false;
+	}
+}
+
+static bool i965_plane_format_mod_supported(struct drm_plane *_plane,
+					    u32 format, u64 modifier)
+{
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		break;
+	default:
+		return false;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_C8:
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_XRGB2101010:
+	case DRM_FORMAT_XBGR2101010:
+		return modifier == DRM_FORMAT_MOD_LINEAR ||
+			modifier == I915_FORMAT_MOD_X_TILED;
+	default:
+		return false;
+	}
+}
+
+static bool intel_cursor_format_mod_supported(struct drm_plane *_plane,
+					      u32 format, u64 modifier)
+{
+	return modifier == DRM_FORMAT_MOD_LINEAR &&
+		format == DRM_FORMAT_ARGB8888;
+}
+
+static const struct drm_plane_funcs i965_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = i965_plane_format_mod_supported,
+};
+
+static const struct drm_plane_funcs i8xx_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = i8xx_plane_format_mod_supported,
+};
+
+static int
+intel_legacy_cursor_update(struct drm_plane *plane,
+			   struct drm_crtc *crtc,
+			   struct drm_framebuffer *fb,
+			   int crtc_x, int crtc_y,
+			   unsigned int crtc_w, unsigned int crtc_h,
+			   u32 src_x, u32 src_y,
+			   u32 src_w, u32 src_h,
+			   struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	int ret;
+	struct drm_plane_state *old_plane_state, *new_plane_state;
+	struct intel_plane *intel_plane = to_intel_plane(plane);
+	struct drm_framebuffer *old_fb;
+	struct intel_crtc_state *crtc_state =
+		to_intel_crtc_state(crtc->state);
+	struct intel_crtc_state *new_crtc_state;
+
+	/*
+	 * When crtc is inactive or there is a modeset pending,
+	 * wait for it to complete in the slowpath
+	 */
+	if (!crtc_state->base.active || needs_modeset(&crtc_state->base) ||
+	    crtc_state->update_pipe)
+		goto slow;
+
+	old_plane_state = plane->state;
+	/*
+	 * Don't do an async update if there is an outstanding commit modifying
+	 * the plane.  This prevents our async update's changes from getting
+	 * overridden by a previous synchronous update's state.
+	 */
+	if (old_plane_state->commit &&
+	    !try_wait_for_completion(&old_plane_state->commit->hw_done))
+		goto slow;
+
+	/*
+	 * If any parameters change that may affect watermarks,
+	 * take the slowpath. Only changing fb or position should be
+	 * in the fastpath.
+	 */
+	if (old_plane_state->crtc != crtc ||
+	    old_plane_state->src_w != src_w ||
+	    old_plane_state->src_h != src_h ||
+	    old_plane_state->crtc_w != crtc_w ||
+	    old_plane_state->crtc_h != crtc_h ||
+	    !old_plane_state->fb != !fb)
+		goto slow;
+
+	new_plane_state = intel_plane_duplicate_state(plane);
+	if (!new_plane_state)
+		return -ENOMEM;
+
+	new_crtc_state = to_intel_crtc_state(intel_crtc_duplicate_state(crtc));
+	if (!new_crtc_state) {
+		ret = -ENOMEM;
+		goto out_free;
+	}
+
+	drm_atomic_set_fb_for_plane(new_plane_state, fb);
+
+	new_plane_state->src_x = src_x;
+	new_plane_state->src_y = src_y;
+	new_plane_state->src_w = src_w;
+	new_plane_state->src_h = src_h;
+	new_plane_state->crtc_x = crtc_x;
+	new_plane_state->crtc_y = crtc_y;
+	new_plane_state->crtc_w = crtc_w;
+	new_plane_state->crtc_h = crtc_h;
+
+	ret = intel_plane_atomic_check_with_state(crtc_state, new_crtc_state,
+						  to_intel_plane_state(old_plane_state),
+						  to_intel_plane_state(new_plane_state));
+	if (ret)
+		goto out_free;
+
+	ret = mutex_lock_interruptible(&dev_priv->drm.struct_mutex);
+	if (ret)
+		goto out_free;
+
+	ret = intel_plane_pin_fb(to_intel_plane_state(new_plane_state));
+	if (ret)
+		goto out_unlock;
+
+	intel_fb_obj_flush(intel_fb_obj(fb), ORIGIN_FLIP);
+
+	old_fb = old_plane_state->fb;
+	i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(fb),
+			  intel_plane->frontbuffer_bit);
+
+	/* Swap plane state */
+	plane->state = new_plane_state;
+
+	/*
+	 * We cannot swap crtc_state as it may be in use by an atomic commit or
+	 * page flip that's running simultaneously. If we swap crtc_state and
+	 * destroy the old state, we will cause a use-after-free there.
+	 *
+	 * Only update active_planes, which is needed for our internal
+	 * bookkeeping. Either value will do the right thing when updating
+	 * planes atomically. If the cursor was part of the atomic update then
+	 * we would have taken the slowpath.
+	 */
+	crtc_state->active_planes = new_crtc_state->active_planes;
+
+	if (plane->state->visible)
+		intel_update_plane(intel_plane, crtc_state,
+				   to_intel_plane_state(plane->state));
+	else
+		intel_disable_plane(intel_plane, crtc_state);
+
+	intel_plane_unpin_fb(to_intel_plane_state(old_plane_state));
+
+out_unlock:
+	mutex_unlock(&dev_priv->drm.struct_mutex);
+out_free:
+	if (new_crtc_state)
+		intel_crtc_destroy_state(crtc, &new_crtc_state->base);
+	if (ret)
+		intel_plane_destroy_state(plane, new_plane_state);
+	else
+		intel_plane_destroy_state(plane, old_plane_state);
+	return ret;
+
+slow:
+	return drm_atomic_helper_update_plane(plane, crtc, fb,
+					      crtc_x, crtc_y, crtc_w, crtc_h,
+					      src_x, src_y, src_w, src_h, ctx);
+}
+
+static const struct drm_plane_funcs intel_cursor_plane_funcs = {
+	.update_plane = intel_legacy_cursor_update,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = intel_cursor_format_mod_supported,
+};
+
+static bool i9xx_plane_has_fbc(struct drm_i915_private *dev_priv,
+			       enum i9xx_plane_id i9xx_plane)
+{
+	if (!HAS_FBC(dev_priv))
+		return false;
+
+	if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+		return i9xx_plane == PLANE_A; /* tied to pipe A */
+	else if (IS_IVYBRIDGE(dev_priv))
+		return i9xx_plane == PLANE_A || i9xx_plane == PLANE_B ||
+			i9xx_plane == PLANE_C;
+	else if (INTEL_GEN(dev_priv) >= 4)
+		return i9xx_plane == PLANE_A || i9xx_plane == PLANE_B;
+	else
+		return i9xx_plane == PLANE_A;
+}
+
+static struct intel_plane *
+intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	struct intel_plane *plane;
+	const struct drm_plane_funcs *plane_funcs;
+	unsigned int supported_rotations;
+	unsigned int possible_crtcs;
+	const u64 *modifiers;
+	const u32 *formats;
+	int num_formats;
+	int ret;
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		return skl_universal_plane_create(dev_priv, pipe,
+						  PLANE_PRIMARY);
+
+	plane = intel_plane_alloc();
+	if (IS_ERR(plane))
+		return plane;
+
+	plane->pipe = pipe;
+	/*
+	 * On gen2/3 only plane A can do FBC, but the panel fitter and LVDS
+	 * port is hooked to pipe B. Hence we want plane A feeding pipe B.
+	 */
+	if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) < 4)
+		plane->i9xx_plane = (enum i9xx_plane_id) !pipe;
+	else
+		plane->i9xx_plane = (enum i9xx_plane_id) pipe;
+	plane->id = PLANE_PRIMARY;
+	plane->frontbuffer_bit = INTEL_FRONTBUFFER(pipe, plane->id);
+
+	plane->has_fbc = i9xx_plane_has_fbc(dev_priv, plane->i9xx_plane);
+	if (plane->has_fbc) {
+		struct intel_fbc *fbc = &dev_priv->fbc;
+
+		fbc->possible_framebuffer_bits |= plane->frontbuffer_bit;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 4) {
+		formats = i965_primary_formats;
+		num_formats = ARRAY_SIZE(i965_primary_formats);
+		modifiers = i9xx_format_modifiers;
+
+		plane->max_stride = i9xx_plane_max_stride;
+		plane->update_plane = i9xx_update_plane;
+		plane->disable_plane = i9xx_disable_plane;
+		plane->get_hw_state = i9xx_plane_get_hw_state;
+		plane->check_plane = i9xx_plane_check;
+
+		plane_funcs = &i965_plane_funcs;
+	} else {
+		formats = i8xx_primary_formats;
+		num_formats = ARRAY_SIZE(i8xx_primary_formats);
+		modifiers = i9xx_format_modifiers;
+
+		plane->max_stride = i9xx_plane_max_stride;
+		plane->update_plane = i9xx_update_plane;
+		plane->disable_plane = i9xx_disable_plane;
+		plane->get_hw_state = i9xx_plane_get_hw_state;
+		plane->check_plane = i9xx_plane_check;
+
+		plane_funcs = &i8xx_plane_funcs;
+	}
+
+	possible_crtcs = BIT(pipe);
+
+	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
+		ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
+					       possible_crtcs, plane_funcs,
+					       formats, num_formats, modifiers,
+					       DRM_PLANE_TYPE_PRIMARY,
+					       "primary %c", pipe_name(pipe));
+	else
+		ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
+					       possible_crtcs, plane_funcs,
+					       formats, num_formats, modifiers,
+					       DRM_PLANE_TYPE_PRIMARY,
+					       "plane %c",
+					       plane_name(plane->i9xx_plane));
+	if (ret)
+		goto fail;
+
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B) {
+		supported_rotations =
+			DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
+			DRM_MODE_REFLECT_X;
+	} else if (INTEL_GEN(dev_priv) >= 4) {
+		supported_rotations =
+			DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180;
+	} else {
+		supported_rotations = DRM_MODE_ROTATE_0;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 4)
+		drm_plane_create_rotation_property(&plane->base,
+						   DRM_MODE_ROTATE_0,
+						   supported_rotations);
+
+	drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
+
+	return plane;
+
+fail:
+	intel_plane_free(plane);
+
+	return ERR_PTR(ret);
+}
+
+static struct intel_plane *
+intel_cursor_plane_create(struct drm_i915_private *dev_priv,
+			  enum pipe pipe)
+{
+	unsigned int possible_crtcs;
+	struct intel_plane *cursor;
+	int ret;
+
+	cursor = intel_plane_alloc();
+	if (IS_ERR(cursor))
+		return cursor;
+
+	cursor->pipe = pipe;
+	cursor->i9xx_plane = (enum i9xx_plane_id) pipe;
+	cursor->id = PLANE_CURSOR;
+	cursor->frontbuffer_bit = INTEL_FRONTBUFFER(pipe, cursor->id);
+
+	if (IS_I845G(dev_priv) || IS_I865G(dev_priv)) {
+		cursor->max_stride = i845_cursor_max_stride;
+		cursor->update_plane = i845_update_cursor;
+		cursor->disable_plane = i845_disable_cursor;
+		cursor->get_hw_state = i845_cursor_get_hw_state;
+		cursor->check_plane = i845_check_cursor;
+	} else {
+		cursor->max_stride = i9xx_cursor_max_stride;
+		cursor->update_plane = i9xx_update_cursor;
+		cursor->disable_plane = i9xx_disable_cursor;
+		cursor->get_hw_state = i9xx_cursor_get_hw_state;
+		cursor->check_plane = i9xx_check_cursor;
+	}
+
+	cursor->cursor.base = ~0;
+	cursor->cursor.cntl = ~0;
+
+	if (IS_I845G(dev_priv) || IS_I865G(dev_priv) || HAS_CUR_FBC(dev_priv))
+		cursor->cursor.size = ~0;
+
+	possible_crtcs = BIT(pipe);
+
+	ret = drm_universal_plane_init(&dev_priv->drm, &cursor->base,
+				       possible_crtcs, &intel_cursor_plane_funcs,
+				       intel_cursor_formats,
+				       ARRAY_SIZE(intel_cursor_formats),
+				       cursor_format_modifiers,
+				       DRM_PLANE_TYPE_CURSOR,
+				       "cursor %c", pipe_name(pipe));
+	if (ret)
+		goto fail;
+
+	if (INTEL_GEN(dev_priv) >= 4)
+		drm_plane_create_rotation_property(&cursor->base,
+						   DRM_MODE_ROTATE_0,
+						   DRM_MODE_ROTATE_0 |
+						   DRM_MODE_ROTATE_180);
+
+	drm_plane_helper_add(&cursor->base, &intel_plane_helper_funcs);
+
+	return cursor;
+
+fail:
+	intel_plane_free(cursor);
+
+	return ERR_PTR(ret);
+}
+
+static void intel_crtc_init_scalers(struct intel_crtc *crtc,
+				    struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc_scaler_state *scaler_state =
+		&crtc_state->scaler_state;
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	int i;
+
+	crtc->num_scalers = RUNTIME_INFO(dev_priv)->num_scalers[crtc->pipe];
+	if (!crtc->num_scalers)
+		return;
+
+	for (i = 0; i < crtc->num_scalers; i++) {
+		struct intel_scaler *scaler = &scaler_state->scalers[i];
+
+		scaler->in_use = 0;
+		scaler->mode = 0;
+	}
+
+	scaler_state->scaler_id = -1;
+}
+
+static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	struct intel_crtc *intel_crtc;
+	struct intel_crtc_state *crtc_state = NULL;
+	struct intel_plane *primary = NULL;
+	struct intel_plane *cursor = NULL;
+	int sprite, ret;
+
+	intel_crtc = kzalloc(sizeof(*intel_crtc), GFP_KERNEL);
+	if (!intel_crtc)
+		return -ENOMEM;
+
+	crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);
+	if (!crtc_state) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+	__drm_atomic_helper_crtc_reset(&intel_crtc->base, &crtc_state->base);
+	intel_crtc->config = crtc_state;
+
+	primary = intel_primary_plane_create(dev_priv, pipe);
+	if (IS_ERR(primary)) {
+		ret = PTR_ERR(primary);
+		goto fail;
+	}
+	intel_crtc->plane_ids_mask |= BIT(primary->id);
+
+	for_each_sprite(dev_priv, pipe, sprite) {
+		struct intel_plane *plane;
+
+		plane = intel_sprite_plane_create(dev_priv, pipe, sprite);
+		if (IS_ERR(plane)) {
+			ret = PTR_ERR(plane);
+			goto fail;
+		}
+		intel_crtc->plane_ids_mask |= BIT(plane->id);
+	}
+
+	cursor = intel_cursor_plane_create(dev_priv, pipe);
+	if (IS_ERR(cursor)) {
+		ret = PTR_ERR(cursor);
+		goto fail;
+	}
+	intel_crtc->plane_ids_mask |= BIT(cursor->id);
+
+	ret = drm_crtc_init_with_planes(&dev_priv->drm, &intel_crtc->base,
+					&primary->base, &cursor->base,
+					&intel_crtc_funcs,
+					"pipe %c", pipe_name(pipe));
+	if (ret)
+		goto fail;
+
+	intel_crtc->pipe = pipe;
+
+	/* initialize shared scalers */
+	intel_crtc_init_scalers(intel_crtc, crtc_state);
+
+	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->pipe_to_crtc_mapping) ||
+	       dev_priv->pipe_to_crtc_mapping[pipe] != NULL);
+	dev_priv->pipe_to_crtc_mapping[pipe] = intel_crtc;
+
+	if (INTEL_GEN(dev_priv) < 9) {
+		enum i9xx_plane_id i9xx_plane = primary->i9xx_plane;
+
+		BUG_ON(i9xx_plane >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
+		       dev_priv->plane_to_crtc_mapping[i9xx_plane] != NULL);
+		dev_priv->plane_to_crtc_mapping[i9xx_plane] = intel_crtc;
+	}
+
+	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
+
+	intel_color_init(intel_crtc);
+
+	WARN_ON(drm_crtc_index(&intel_crtc->base) != intel_crtc->pipe);
+
+	return 0;
+
+fail:
+	/*
+	 * drm_mode_config_cleanup() will free up any
+	 * crtcs/planes already initialized.
+	 */
+	kfree(crtc_state);
+	kfree(intel_crtc);
+
+	return ret;
+}
+
+int intel_get_pipe_from_crtc_id_ioctl(struct drm_device *dev, void *data,
+				      struct drm_file *file)
+{
+	struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
+	struct drm_crtc *drmmode_crtc;
+	struct intel_crtc *crtc;
+
+	drmmode_crtc = drm_crtc_find(dev, file, pipe_from_crtc_id->crtc_id);
+	if (!drmmode_crtc)
+		return -ENOENT;
+
+	crtc = to_intel_crtc(drmmode_crtc);
+	pipe_from_crtc_id->pipe = crtc->pipe;
+
+	return 0;
+}
+
+static int intel_encoder_clones(struct intel_encoder *encoder)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct intel_encoder *source_encoder;
+	int index_mask = 0;
+	int entry = 0;
+
+	for_each_intel_encoder(dev, source_encoder) {
+		if (encoders_cloneable(encoder, source_encoder))
+			index_mask |= (1 << entry);
+
+		entry++;
+	}
+
+	return index_mask;
+}
+
+static bool ilk_has_edp_a(struct drm_i915_private *dev_priv)
+{
+	if (!IS_MOBILE(dev_priv))
+		return false;
+
+	if ((I915_READ(DP_A) & DP_DETECTED) == 0)
+		return false;
+
+	if (IS_GEN(dev_priv, 5) && (I915_READ(FUSE_STRAP) & ILK_eDP_A_DISABLE))
+		return false;
+
+	return true;
+}
+
+static bool intel_ddi_crt_present(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) >= 9)
+		return false;
+
+	if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv))
+		return false;
+
+	if (HAS_PCH_LPT_H(dev_priv) &&
+	    I915_READ(SFUSE_STRAP) & SFUSE_STRAP_CRT_DISABLED)
+		return false;
+
+	/* DDI E can't be used if DDI A requires 4 lanes */
+	if (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)
+		return false;
+
+	if (!dev_priv->vbt.int_crt_support)
+		return false;
+
+	return true;
+}
+
+void intel_pps_unlock_regs_wa(struct drm_i915_private *dev_priv)
+{
+	int pps_num;
+	int pps_idx;
+
+	if (HAS_DDI(dev_priv))
+		return;
+	/*
+	 * This w/a is needed at least on CPT/PPT, but to be sure apply it
+	 * everywhere where registers can be write protected.
+	 */
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		pps_num = 2;
+	else
+		pps_num = 1;
+
+	for (pps_idx = 0; pps_idx < pps_num; pps_idx++) {
+		u32 val = I915_READ(PP_CONTROL(pps_idx));
+
+		val = (val & ~PANEL_UNLOCK_MASK) | PANEL_UNLOCK_REGS;
+		I915_WRITE(PP_CONTROL(pps_idx), val);
+	}
+}
+
+static void intel_pps_init(struct drm_i915_private *dev_priv)
+{
+	if (HAS_PCH_SPLIT(dev_priv) || IS_GEN9_LP(dev_priv))
+		dev_priv->pps_mmio_base = PCH_PPS_BASE;
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		dev_priv->pps_mmio_base = VLV_PPS_BASE;
+	else
+		dev_priv->pps_mmio_base = PPS_BASE;
+
+	intel_pps_unlock_regs_wa(dev_priv);
+}
+
+static void intel_setup_outputs(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+	bool dpd_is_edp = false;
+
+	intel_pps_init(dev_priv);
+
+	if (!HAS_DISPLAY(dev_priv))
+		return;
+
+	if (IS_ELKHARTLAKE(dev_priv)) {
+		intel_ddi_init(dev_priv, PORT_A);
+		intel_ddi_init(dev_priv, PORT_B);
+		intel_ddi_init(dev_priv, PORT_C);
+		icl_dsi_init(dev_priv);
+	} else if (INTEL_GEN(dev_priv) >= 11) {
+		intel_ddi_init(dev_priv, PORT_A);
+		intel_ddi_init(dev_priv, PORT_B);
+		intel_ddi_init(dev_priv, PORT_C);
+		intel_ddi_init(dev_priv, PORT_D);
+		intel_ddi_init(dev_priv, PORT_E);
+		/*
+		 * On some ICL SKUs port F is not present. No strap bits for
+		 * this, so rely on VBT.
+		 * Work around broken VBTs on SKUs known to have no port F.
+		 */
+		if (IS_ICL_WITH_PORT_F(dev_priv) &&
+		    intel_bios_is_port_present(dev_priv, PORT_F))
+			intel_ddi_init(dev_priv, PORT_F);
+
+		icl_dsi_init(dev_priv);
+	} else if (IS_GEN9_LP(dev_priv)) {
+		/*
+		 * FIXME: Broxton doesn't support port detection via the
+		 * DDI_BUF_CTL_A or SFUSE_STRAP registers, find another way to
+		 * detect the ports.
+		 */
+		intel_ddi_init(dev_priv, PORT_A);
+		intel_ddi_init(dev_priv, PORT_B);
+		intel_ddi_init(dev_priv, PORT_C);
+
+		vlv_dsi_init(dev_priv);
+	} else if (HAS_DDI(dev_priv)) {
+		int found;
+
+		if (intel_ddi_crt_present(dev_priv))
+			intel_crt_init(dev_priv);
+
+		/*
+		 * Haswell uses DDI functions to detect digital outputs.
+		 * On SKL pre-D0 the strap isn't connected, so we assume
+		 * it's there.
+		 */
+		found = I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_INIT_DISPLAY_DETECTED;
+		/* WaIgnoreDDIAStrap: skl */
+		if (found || IS_GEN9_BC(dev_priv))
+			intel_ddi_init(dev_priv, PORT_A);
+
+		/* DDI B, C, D, and F detection is indicated by the SFUSE_STRAP
+		 * register */
+		found = I915_READ(SFUSE_STRAP);
+
+		if (found & SFUSE_STRAP_DDIB_DETECTED)
+			intel_ddi_init(dev_priv, PORT_B);
+		if (found & SFUSE_STRAP_DDIC_DETECTED)
+			intel_ddi_init(dev_priv, PORT_C);
+		if (found & SFUSE_STRAP_DDID_DETECTED)
+			intel_ddi_init(dev_priv, PORT_D);
+		if (found & SFUSE_STRAP_DDIF_DETECTED)
+			intel_ddi_init(dev_priv, PORT_F);
+		/*
+		 * On SKL we don't have a way to detect DDI-E so we rely on VBT.
+		 */
+		if (IS_GEN9_BC(dev_priv) &&
+		    intel_bios_is_port_present(dev_priv, PORT_E))
+			intel_ddi_init(dev_priv, PORT_E);
+
+	} else if (HAS_PCH_SPLIT(dev_priv)) {
+		int found;
+
+		/*
+		 * intel_edp_init_connector() depends on this completing first,
+		 * to prevent the registration of both eDP and LVDS and the
+		 * incorrect sharing of the PPS.
+		 */
+		intel_lvds_init(dev_priv);
+		intel_crt_init(dev_priv);
+
+		dpd_is_edp = intel_dp_is_port_edp(dev_priv, PORT_D);
+
+		if (ilk_has_edp_a(dev_priv))
+			intel_dp_init(dev_priv, DP_A, PORT_A);
+
+		if (I915_READ(PCH_HDMIB) & SDVO_DETECTED) {
+			/* PCH SDVOB multiplex with HDMIB */
+			found = intel_sdvo_init(dev_priv, PCH_SDVOB, PORT_B);
+			if (!found)
+				intel_hdmi_init(dev_priv, PCH_HDMIB, PORT_B);
+			if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
+				intel_dp_init(dev_priv, PCH_DP_B, PORT_B);
+		}
+
+		if (I915_READ(PCH_HDMIC) & SDVO_DETECTED)
+			intel_hdmi_init(dev_priv, PCH_HDMIC, PORT_C);
+
+		if (!dpd_is_edp && I915_READ(PCH_HDMID) & SDVO_DETECTED)
+			intel_hdmi_init(dev_priv, PCH_HDMID, PORT_D);
+
+		if (I915_READ(PCH_DP_C) & DP_DETECTED)
+			intel_dp_init(dev_priv, PCH_DP_C, PORT_C);
+
+		if (I915_READ(PCH_DP_D) & DP_DETECTED)
+			intel_dp_init(dev_priv, PCH_DP_D, PORT_D);
+	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		bool has_edp, has_port;
+
+		if (IS_VALLEYVIEW(dev_priv) && dev_priv->vbt.int_crt_support)
+			intel_crt_init(dev_priv);
+
+		/*
+		 * The DP_DETECTED bit is the latched state of the DDC
+		 * SDA pin at boot. However since eDP doesn't require DDC
+		 * (no way to plug in a DP->HDMI dongle) the DDC pins for
+		 * eDP ports may have been muxed to an alternate function.
+		 * Thus we can't rely on the DP_DETECTED bit alone to detect
+		 * eDP ports. Consult the VBT as well as DP_DETECTED to
+		 * detect eDP ports.
+		 *
+		 * Sadly the straps seem to be missing sometimes even for HDMI
+		 * ports (eg. on Voyo V3 - CHT x7-Z8700), so check both strap
+		 * and VBT for the presence of the port. Additionally we can't
+		 * trust the port type the VBT declares as we've seen at least
+		 * HDMI ports that the VBT claim are DP or eDP.
+		 */
+		has_edp = intel_dp_is_port_edp(dev_priv, PORT_B);
+		has_port = intel_bios_is_port_present(dev_priv, PORT_B);
+		if (I915_READ(VLV_DP_B) & DP_DETECTED || has_port)
+			has_edp &= intel_dp_init(dev_priv, VLV_DP_B, PORT_B);
+		if ((I915_READ(VLV_HDMIB) & SDVO_DETECTED || has_port) && !has_edp)
+			intel_hdmi_init(dev_priv, VLV_HDMIB, PORT_B);
+
+		has_edp = intel_dp_is_port_edp(dev_priv, PORT_C);
+		has_port = intel_bios_is_port_present(dev_priv, PORT_C);
+		if (I915_READ(VLV_DP_C) & DP_DETECTED || has_port)
+			has_edp &= intel_dp_init(dev_priv, VLV_DP_C, PORT_C);
+		if ((I915_READ(VLV_HDMIC) & SDVO_DETECTED || has_port) && !has_edp)
+			intel_hdmi_init(dev_priv, VLV_HDMIC, PORT_C);
+
+		if (IS_CHERRYVIEW(dev_priv)) {
+			/*
+			 * eDP not supported on port D,
+			 * so no need to worry about it
+			 */
+			has_port = intel_bios_is_port_present(dev_priv, PORT_D);
+			if (I915_READ(CHV_DP_D) & DP_DETECTED || has_port)
+				intel_dp_init(dev_priv, CHV_DP_D, PORT_D);
+			if (I915_READ(CHV_HDMID) & SDVO_DETECTED || has_port)
+				intel_hdmi_init(dev_priv, CHV_HDMID, PORT_D);
+		}
+
+		vlv_dsi_init(dev_priv);
+	} else if (IS_PINEVIEW(dev_priv)) {
+		intel_lvds_init(dev_priv);
+		intel_crt_init(dev_priv);
+	} else if (IS_GEN_RANGE(dev_priv, 3, 4)) {
+		bool found = false;
+
+		if (IS_MOBILE(dev_priv))
+			intel_lvds_init(dev_priv);
+
+		intel_crt_init(dev_priv);
+
+		if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
+			DRM_DEBUG_KMS("probing SDVOB\n");
+			found = intel_sdvo_init(dev_priv, GEN3_SDVOB, PORT_B);
+			if (!found && IS_G4X(dev_priv)) {
+				DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
+				intel_hdmi_init(dev_priv, GEN4_HDMIB, PORT_B);
+			}
+
+			if (!found && IS_G4X(dev_priv))
+				intel_dp_init(dev_priv, DP_B, PORT_B);
+		}
+
+		/* Before G4X SDVOC doesn't have its own detect register */
+
+		if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
+			DRM_DEBUG_KMS("probing SDVOC\n");
+			found = intel_sdvo_init(dev_priv, GEN3_SDVOC, PORT_C);
+		}
+
+		if (!found && (I915_READ(GEN3_SDVOC) & SDVO_DETECTED)) {
+
+			if (IS_G4X(dev_priv)) {
+				DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
+				intel_hdmi_init(dev_priv, GEN4_HDMIC, PORT_C);
+			}
+			if (IS_G4X(dev_priv))
+				intel_dp_init(dev_priv, DP_C, PORT_C);
+		}
+
+		if (IS_G4X(dev_priv) && (I915_READ(DP_D) & DP_DETECTED))
+			intel_dp_init(dev_priv, DP_D, PORT_D);
+
+		if (SUPPORTS_TV(dev_priv))
+			intel_tv_init(dev_priv);
+	} else if (IS_GEN(dev_priv, 2)) {
+		if (IS_I85X(dev_priv))
+			intel_lvds_init(dev_priv);
+
+		intel_crt_init(dev_priv);
+		intel_dvo_init(dev_priv);
+	}
+
+	intel_psr_init(dev_priv);
+
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		encoder->base.possible_crtcs = encoder->crtc_mask;
+		encoder->base.possible_clones =
+			intel_encoder_clones(encoder);
+	}
+
+	intel_init_pch_refclk(dev_priv);
+
+	drm_helper_move_panel_connectors_to_head(&dev_priv->drm);
+}
+
+static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+
+	drm_framebuffer_cleanup(fb);
+
+	i915_gem_object_lock(obj);
+	WARN_ON(!obj->framebuffer_references--);
+	i915_gem_object_unlock(obj);
+
+	i915_gem_object_put(obj);
+
+	kfree(intel_fb);
+}
+
+static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
+						struct drm_file *file,
+						unsigned int *handle)
+{
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+
+	if (obj->userptr.mm) {
+		DRM_DEBUG("attempting to use a userptr for a framebuffer, denied\n");
+		return -EINVAL;
+	}
+
+	return drm_gem_handle_create(file, &obj->base, handle);
+}
+
+static int intel_user_framebuffer_dirty(struct drm_framebuffer *fb,
+					struct drm_file *file,
+					unsigned flags, unsigned color,
+					struct drm_clip_rect *clips,
+					unsigned num_clips)
+{
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+
+	i915_gem_object_flush_if_display(obj);
+	intel_fb_obj_flush(obj, ORIGIN_DIRTYFB);
+
+	return 0;
+}
+
+static const struct drm_framebuffer_funcs intel_fb_funcs = {
+	.destroy = intel_user_framebuffer_destroy,
+	.create_handle = intel_user_framebuffer_create_handle,
+	.dirty = intel_user_framebuffer_dirty,
+};
+
+static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
+				  struct drm_i915_gem_object *obj,
+				  struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
+	struct drm_framebuffer *fb = &intel_fb->base;
+	u32 max_stride;
+	unsigned int tiling, stride;
+	int ret = -EINVAL;
+	int i;
+
+	i915_gem_object_lock(obj);
+	obj->framebuffer_references++;
+	tiling = i915_gem_object_get_tiling(obj);
+	stride = i915_gem_object_get_stride(obj);
+	i915_gem_object_unlock(obj);
+
+	if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) {
+		/*
+		 * If there's a fence, enforce that
+		 * the fb modifier and tiling mode match.
+		 */
+		if (tiling != I915_TILING_NONE &&
+		    tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) {
+			DRM_DEBUG_KMS("tiling_mode doesn't match fb modifier\n");
+			goto err;
+		}
+	} else {
+		if (tiling == I915_TILING_X) {
+			mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED;
+		} else if (tiling == I915_TILING_Y) {
+			DRM_DEBUG_KMS("No Y tiling for legacy addfb\n");
+			goto err;
+		}
+	}
+
+	if (!drm_any_plane_has_format(&dev_priv->drm,
+				      mode_cmd->pixel_format,
+				      mode_cmd->modifier[0])) {
+		struct drm_format_name_buf format_name;
+
+		DRM_DEBUG_KMS("unsupported pixel format %s / modifier 0x%llx\n",
+			      drm_get_format_name(mode_cmd->pixel_format,
+						  &format_name),
+			      mode_cmd->modifier[0]);
+		goto err;
+	}
+
+	/*
+	 * gen2/3 display engine uses the fence if present,
+	 * so the tiling mode must match the fb modifier exactly.
+	 */
+	if (INTEL_GEN(dev_priv) < 4 &&
+	    tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) {
+		DRM_DEBUG_KMS("tiling_mode must match fb modifier exactly on gen2/3\n");
+		goto err;
+	}
+
+	max_stride = intel_fb_max_stride(dev_priv, mode_cmd->pixel_format,
+					 mode_cmd->modifier[0]);
+	if (mode_cmd->pitches[0] > max_stride) {
+		DRM_DEBUG_KMS("%s pitch (%u) must be at most %d\n",
+			      mode_cmd->modifier[0] != DRM_FORMAT_MOD_LINEAR ?
+			      "tiled" : "linear",
+			      mode_cmd->pitches[0], max_stride);
+		goto err;
+	}
+
+	/*
+	 * If there's a fence, enforce that
+	 * the fb pitch and fence stride match.
+	 */
+	if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) {
+		DRM_DEBUG_KMS("pitch (%d) must match tiling stride (%d)\n",
+			      mode_cmd->pitches[0], stride);
+		goto err;
+	}
+
+	/* FIXME need to adjust LINOFF/TILEOFF accordingly. */
+	if (mode_cmd->offsets[0] != 0)
+		goto err;
+
+	drm_helper_mode_fill_fb_struct(&dev_priv->drm, fb, mode_cmd);
+
+	for (i = 0; i < fb->format->num_planes; i++) {
+		u32 stride_alignment;
+
+		if (mode_cmd->handles[i] != mode_cmd->handles[0]) {
+			DRM_DEBUG_KMS("bad plane %d handle\n", i);
+			goto err;
+		}
+
+		stride_alignment = intel_fb_stride_alignment(fb, i);
+
+		/*
+		 * Display WA #0531: skl,bxt,kbl,glk
+		 *
+		 * Render decompression and plane width > 3840
+		 * combined with horizontal panning requires the
+		 * plane stride to be a multiple of 4. We'll just
+		 * require the entire fb to accommodate that to avoid
+		 * potential runtime errors at plane configuration time.
+		 */
+		if (IS_GEN(dev_priv, 9) && i == 0 && fb->width > 3840 &&
+		    is_ccs_modifier(fb->modifier))
+			stride_alignment *= 4;
+
+		if (fb->pitches[i] & (stride_alignment - 1)) {
+			DRM_DEBUG_KMS("plane %d pitch (%d) must be at least %u byte aligned\n",
+				      i, fb->pitches[i], stride_alignment);
+			goto err;
+		}
+
+		fb->obj[i] = &obj->base;
+	}
+
+	ret = intel_fill_fb_info(dev_priv, fb);
+	if (ret)
+		goto err;
+
+	ret = drm_framebuffer_init(&dev_priv->drm, fb, &intel_fb_funcs);
+	if (ret) {
+		DRM_ERROR("framebuffer init failed %d\n", ret);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	i915_gem_object_lock(obj);
+	obj->framebuffer_references--;
+	i915_gem_object_unlock(obj);
+	return ret;
+}
+
+static struct drm_framebuffer *
+intel_user_framebuffer_create(struct drm_device *dev,
+			      struct drm_file *filp,
+			      const struct drm_mode_fb_cmd2 *user_mode_cmd)
+{
+	struct drm_framebuffer *fb;
+	struct drm_i915_gem_object *obj;
+	struct drm_mode_fb_cmd2 mode_cmd = *user_mode_cmd;
+
+	obj = i915_gem_object_lookup(filp, mode_cmd.handles[0]);
+	if (!obj)
+		return ERR_PTR(-ENOENT);
+
+	fb = intel_framebuffer_create(obj, &mode_cmd);
+	if (IS_ERR(fb))
+		i915_gem_object_put(obj);
+
+	return fb;
+}
+
+static void intel_atomic_state_free(struct drm_atomic_state *state)
+{
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+
+	drm_atomic_state_default_release(state);
+
+	i915_sw_fence_fini(&intel_state->commit_ready);
+
+	kfree(state);
+}
+
+static enum drm_mode_status
+intel_mode_valid(struct drm_device *dev,
+		 const struct drm_display_mode *mode)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	int hdisplay_max, htotal_max;
+	int vdisplay_max, vtotal_max;
+
+	/*
+	 * Can't reject DBLSCAN here because Xorg ddxen can add piles
+	 * of DBLSCAN modes to the output's mode list when they detect
+	 * the scaling mode property on the connector. And they don't
+	 * ask the kernel to validate those modes in any way until
+	 * modeset time at which point the client gets a protocol error.
+	 * So in order to not upset those clients we silently ignore the
+	 * DBLSCAN flag on such connectors. For other connectors we will
+	 * reject modes with the DBLSCAN flag in encoder->compute_config().
+	 * And we always reject DBLSCAN modes in connector->mode_valid()
+	 * as we never want such modes on the connector's mode list.
+	 */
+
+	if (mode->vscan > 1)
+		return MODE_NO_VSCAN;
+
+	if (mode->flags & DRM_MODE_FLAG_HSKEW)
+		return MODE_H_ILLEGAL;
+
+	if (mode->flags & (DRM_MODE_FLAG_CSYNC |
+			   DRM_MODE_FLAG_NCSYNC |
+			   DRM_MODE_FLAG_PCSYNC))
+		return MODE_HSYNC;
+
+	if (mode->flags & (DRM_MODE_FLAG_BCAST |
+			   DRM_MODE_FLAG_PIXMUX |
+			   DRM_MODE_FLAG_CLKDIV2))
+		return MODE_BAD;
+
+	if (INTEL_GEN(dev_priv) >= 9 ||
+	    IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) {
+		hdisplay_max = 8192; /* FDI max 4096 handled elsewhere */
+		vdisplay_max = 4096;
+		htotal_max = 8192;
+		vtotal_max = 8192;
+	} else if (INTEL_GEN(dev_priv) >= 3) {
+		hdisplay_max = 4096;
+		vdisplay_max = 4096;
+		htotal_max = 8192;
+		vtotal_max = 8192;
+	} else {
+		hdisplay_max = 2048;
+		vdisplay_max = 2048;
+		htotal_max = 4096;
+		vtotal_max = 4096;
+	}
+
+	if (mode->hdisplay > hdisplay_max ||
+	    mode->hsync_start > htotal_max ||
+	    mode->hsync_end > htotal_max ||
+	    mode->htotal > htotal_max)
+		return MODE_H_ILLEGAL;
+
+	if (mode->vdisplay > vdisplay_max ||
+	    mode->vsync_start > vtotal_max ||
+	    mode->vsync_end > vtotal_max ||
+	    mode->vtotal > vtotal_max)
+		return MODE_V_ILLEGAL;
+
+	return MODE_OK;
+}
+
+static const struct drm_mode_config_funcs intel_mode_funcs = {
+	.fb_create = intel_user_framebuffer_create,
+	.get_format_info = intel_get_format_info,
+	.output_poll_changed = intel_fbdev_output_poll_changed,
+	.mode_valid = intel_mode_valid,
+	.atomic_check = intel_atomic_check,
+	.atomic_commit = intel_atomic_commit,
+	.atomic_state_alloc = intel_atomic_state_alloc,
+	.atomic_state_clear = intel_atomic_state_clear,
+	.atomic_state_free = intel_atomic_state_free,
+};
+
+/**
+ * intel_init_display_hooks - initialize the display modesetting hooks
+ * @dev_priv: device private
+ */
+void intel_init_display_hooks(struct drm_i915_private *dev_priv)
+{
+	intel_init_cdclk_hooks(dev_priv);
+
+	if (INTEL_GEN(dev_priv) >= 9) {
+		dev_priv->display.get_pipe_config = haswell_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			skylake_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock =
+			haswell_crtc_compute_clock;
+		dev_priv->display.crtc_enable = haswell_crtc_enable;
+		dev_priv->display.crtc_disable = haswell_crtc_disable;
+	} else if (HAS_DDI(dev_priv)) {
+		dev_priv->display.get_pipe_config = haswell_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock =
+			haswell_crtc_compute_clock;
+		dev_priv->display.crtc_enable = haswell_crtc_enable;
+		dev_priv->display.crtc_disable = haswell_crtc_disable;
+	} else if (HAS_PCH_SPLIT(dev_priv)) {
+		dev_priv->display.get_pipe_config = ironlake_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock =
+			ironlake_crtc_compute_clock;
+		dev_priv->display.crtc_enable = ironlake_crtc_enable;
+		dev_priv->display.crtc_disable = ironlake_crtc_disable;
+	} else if (IS_CHERRYVIEW(dev_priv)) {
+		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock = chv_crtc_compute_clock;
+		dev_priv->display.crtc_enable = valleyview_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+	} else if (IS_VALLEYVIEW(dev_priv)) {
+		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock = vlv_crtc_compute_clock;
+		dev_priv->display.crtc_enable = valleyview_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+	} else if (IS_G4X(dev_priv)) {
+		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock = g4x_crtc_compute_clock;
+		dev_priv->display.crtc_enable = i9xx_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+	} else if (IS_PINEVIEW(dev_priv)) {
+		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock = pnv_crtc_compute_clock;
+		dev_priv->display.crtc_enable = i9xx_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+	} else if (!IS_GEN(dev_priv, 2)) {
+		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock = i9xx_crtc_compute_clock;
+		dev_priv->display.crtc_enable = i9xx_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+	} else {
+		dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+		dev_priv->display.get_initial_plane_config =
+			i9xx_get_initial_plane_config;
+		dev_priv->display.crtc_compute_clock = i8xx_crtc_compute_clock;
+		dev_priv->display.crtc_enable = i9xx_crtc_enable;
+		dev_priv->display.crtc_disable = i9xx_crtc_disable;
+	}
+
+	if (IS_GEN(dev_priv, 5)) {
+		dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
+	} else if (IS_GEN(dev_priv, 6)) {
+		dev_priv->display.fdi_link_train = gen6_fdi_link_train;
+	} else if (IS_IVYBRIDGE(dev_priv)) {
+		/* FIXME: detect B0+ stepping and use auto training */
+		dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
+	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		dev_priv->display.fdi_link_train = hsw_fdi_link_train;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		dev_priv->display.update_crtcs = skl_update_crtcs;
+	else
+		dev_priv->display.update_crtcs = intel_update_crtcs;
+}
+
+static i915_reg_t i915_vgacntrl_reg(struct drm_i915_private *dev_priv)
+{
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		return VLV_VGACNTRL;
+	else if (INTEL_GEN(dev_priv) >= 5)
+		return CPU_VGACNTRL;
+	else
+		return VGACNTRL;
+}
+
+/* Disable the VGA plane that we never use */
+static void i915_disable_vga(struct drm_i915_private *dev_priv)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u8 sr1;
+	i915_reg_t vga_reg = i915_vgacntrl_reg(dev_priv);
+
+	/* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */
+	vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
+	outb(SR01, VGA_SR_INDEX);
+	sr1 = inb(VGA_SR_DATA);
+	outb(sr1 | 1<<5, VGA_SR_DATA);
+	vga_put(pdev, VGA_RSRC_LEGACY_IO);
+	udelay(300);
+
+	I915_WRITE(vga_reg, VGA_DISP_DISABLE);
+	POSTING_READ(vga_reg);
+}
+
+void intel_modeset_init_hw(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	intel_update_cdclk(dev_priv);
+	intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+	dev_priv->cdclk.logical = dev_priv->cdclk.actual = dev_priv->cdclk.hw;
+}
+
+/*
+ * Calculate what we think the watermarks should be for the state we've read
+ * out of the hardware and then immediately program those watermarks so that
+ * we ensure the hardware settings match our internal state.
+ *
+ * We can calculate what we think WM's should be by creating a duplicate of the
+ * current state (which was constructed during hardware readout) and running it
+ * through the atomic check code to calculate new watermark values in the
+ * state object.
+ */
+static void sanitize_watermarks(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *state;
+	struct intel_atomic_state *intel_state;
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *cstate;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+	int i;
+
+	/* Only supported on platforms that use atomic watermark design */
+	if (!dev_priv->display.optimize_watermarks)
+		return;
+
+	/*
+	 * We need to hold connection_mutex before calling duplicate_state so
+	 * that the connector loop is protected.
+	 */
+	drm_modeset_acquire_init(&ctx, 0);
+retry:
+	ret = drm_modeset_lock_all_ctx(dev, &ctx);
+	if (ret == -EDEADLK) {
+		drm_modeset_backoff(&ctx);
+		goto retry;
+	} else if (WARN_ON(ret)) {
+		goto fail;
+	}
+
+	state = drm_atomic_helper_duplicate_state(dev, &ctx);
+	if (WARN_ON(IS_ERR(state)))
+		goto fail;
+
+	intel_state = to_intel_atomic_state(state);
+
+	/*
+	 * Hardware readout is the only time we don't want to calculate
+	 * intermediate watermarks (since we don't trust the current
+	 * watermarks).
+	 */
+	if (!HAS_GMCH(dev_priv))
+		intel_state->skip_intermediate_wm = true;
+
+	ret = intel_atomic_check(dev, state);
+	if (ret) {
+		/*
+		 * If we fail here, it means that the hardware appears to be
+		 * programmed in a way that shouldn't be possible, given our
+		 * understanding of watermark requirements.  This might mean a
+		 * mistake in the hardware readout code or a mistake in the
+		 * watermark calculations for a given platform.  Raise a WARN
+		 * so that this is noticeable.
+		 *
+		 * If this actually happens, we'll have to just leave the
+		 * BIOS-programmed watermarks untouched and hope for the best.
+		 */
+		WARN(true, "Could not determine valid watermarks for inherited state\n");
+		goto put_state;
+	}
+
+	/* Write calculated watermark values back */
+	for_each_new_crtc_in_state(state, crtc, cstate, i) {
+		struct intel_crtc_state *cs = to_intel_crtc_state(cstate);
+
+		cs->wm.need_postvbl_update = true;
+		dev_priv->display.optimize_watermarks(intel_state, cs);
+
+		to_intel_crtc_state(crtc->state)->wm = cs->wm;
+	}
+
+put_state:
+	drm_atomic_state_put(state);
+fail:
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+}
+
+static void intel_update_fdi_pll_freq(struct drm_i915_private *dev_priv)
+{
+	if (IS_GEN(dev_priv, 5)) {
+		u32 fdi_pll_clk =
+			I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK;
+
+		dev_priv->fdi_pll_freq = (fdi_pll_clk + 2) * 10000;
+	} else if (IS_GEN(dev_priv, 6) || IS_IVYBRIDGE(dev_priv)) {
+		dev_priv->fdi_pll_freq = 270000;
+	} else {
+		return;
+	}
+
+	DRM_DEBUG_DRIVER("FDI PLL freq=%d\n", dev_priv->fdi_pll_freq);
+}
+
+static int intel_initial_commit(struct drm_device *dev)
+{
+	struct drm_atomic_state *state = NULL;
+	struct drm_modeset_acquire_ctx ctx;
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *crtc_state;
+	int ret = 0;
+
+	state = drm_atomic_state_alloc(dev);
+	if (!state)
+		return -ENOMEM;
+
+	drm_modeset_acquire_init(&ctx, 0);
+
+retry:
+	state->acquire_ctx = &ctx;
+
+	drm_for_each_crtc(crtc, dev) {
+		crtc_state = drm_atomic_get_crtc_state(state, crtc);
+		if (IS_ERR(crtc_state)) {
+			ret = PTR_ERR(crtc_state);
+			goto out;
+		}
+
+		if (crtc_state->active) {
+			ret = drm_atomic_add_affected_planes(state, crtc);
+			if (ret)
+				goto out;
+
+			/*
+			 * FIXME hack to force a LUT update to avoid the
+			 * plane update forcing the pipe gamma on without
+			 * having a proper LUT loaded. Remove once we
+			 * have readout for pipe gamma enable.
+			 */
+			crtc_state->color_mgmt_changed = true;
+		}
+	}
+
+	ret = drm_atomic_commit(state);
+
+out:
+	if (ret == -EDEADLK) {
+		drm_atomic_state_clear(state);
+		drm_modeset_backoff(&ctx);
+		goto retry;
+	}
+
+	drm_atomic_state_put(state);
+
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+
+	return ret;
+}
+
+int intel_modeset_init(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	enum pipe pipe;
+	struct intel_crtc *crtc;
+	int ret;
+
+	dev_priv->modeset_wq = alloc_ordered_workqueue("i915_modeset", 0);
+
+	drm_mode_config_init(dev);
+
+	ret = intel_bw_init(dev_priv);
+	if (ret)
+		return ret;
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+
+	dev->mode_config.preferred_depth = 24;
+	dev->mode_config.prefer_shadow = 1;
+
+	dev->mode_config.allow_fb_modifiers = true;
+
+	dev->mode_config.funcs = &intel_mode_funcs;
+
+	init_llist_head(&dev_priv->atomic_helper.free_list);
+	INIT_WORK(&dev_priv->atomic_helper.free_work,
+		  intel_atomic_helper_free_state_worker);
+
+	intel_init_quirks(dev_priv);
+
+	intel_fbc_init(dev_priv);
+
+	intel_init_pm(dev_priv);
+
+	/*
+	 * There may be no VBT; and if the BIOS enabled SSC we can
+	 * just keep using it to avoid unnecessary flicker.  Whereas if the
+	 * BIOS isn't using it, don't assume it will work even if the VBT
+	 * indicates as much.
+	 */
+	if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
+		bool bios_lvds_use_ssc = !!(I915_READ(PCH_DREF_CONTROL) &
+					    DREF_SSC1_ENABLE);
+
+		if (dev_priv->vbt.lvds_use_ssc != bios_lvds_use_ssc) {
+			DRM_DEBUG_KMS("SSC %sabled by BIOS, overriding VBT which says %sabled\n",
+				     bios_lvds_use_ssc ? "en" : "dis",
+				     dev_priv->vbt.lvds_use_ssc ? "en" : "dis");
+			dev_priv->vbt.lvds_use_ssc = bios_lvds_use_ssc;
+		}
+	}
+
+	/*
+	 * Maximum framebuffer dimensions, chosen to match
+	 * the maximum render engine surface size on gen4+.
+	 */
+	if (INTEL_GEN(dev_priv) >= 7) {
+		dev->mode_config.max_width = 16384;
+		dev->mode_config.max_height = 16384;
+	} else if (INTEL_GEN(dev_priv) >= 4) {
+		dev->mode_config.max_width = 8192;
+		dev->mode_config.max_height = 8192;
+	} else if (IS_GEN(dev_priv, 3)) {
+		dev->mode_config.max_width = 4096;
+		dev->mode_config.max_height = 4096;
+	} else {
+		dev->mode_config.max_width = 2048;
+		dev->mode_config.max_height = 2048;
+	}
+
+	if (IS_I845G(dev_priv) || IS_I865G(dev_priv)) {
+		dev->mode_config.cursor_width = IS_I845G(dev_priv) ? 64 : 512;
+		dev->mode_config.cursor_height = 1023;
+	} else if (IS_GEN(dev_priv, 2)) {
+		dev->mode_config.cursor_width = 64;
+		dev->mode_config.cursor_height = 64;
+	} else {
+		dev->mode_config.cursor_width = 256;
+		dev->mode_config.cursor_height = 256;
+	}
+
+	dev->mode_config.fb_base = ggtt->gmadr.start;
+
+	DRM_DEBUG_KMS("%d display pipe%s available.\n",
+		      INTEL_INFO(dev_priv)->num_pipes,
+		      INTEL_INFO(dev_priv)->num_pipes > 1 ? "s" : "");
+
+	for_each_pipe(dev_priv, pipe) {
+		ret = intel_crtc_init(dev_priv, pipe);
+		if (ret) {
+			drm_mode_config_cleanup(dev);
+			return ret;
+		}
+	}
+
+	intel_shared_dpll_init(dev);
+	intel_update_fdi_pll_freq(dev_priv);
+
+	intel_update_czclk(dev_priv);
+	intel_modeset_init_hw(dev);
+
+	intel_hdcp_component_init(dev_priv);
+
+	if (dev_priv->max_cdclk_freq == 0)
+		intel_update_max_cdclk(dev_priv);
+
+	/* Just disable it once at startup */
+	i915_disable_vga(dev_priv);
+	intel_setup_outputs(dev_priv);
+
+	drm_modeset_lock_all(dev);
+	intel_modeset_setup_hw_state(dev, dev->mode_config.acquire_ctx);
+	drm_modeset_unlock_all(dev);
+
+	for_each_intel_crtc(dev, crtc) {
+		struct intel_initial_plane_config plane_config = {};
+
+		if (!crtc->active)
+			continue;
+
+		/*
+		 * Note that reserving the BIOS fb up front prevents us
+		 * from stuffing other stolen allocations like the ring
+		 * on top.  This prevents some ugliness at boot time, and
+		 * can even allow for smooth boot transitions if the BIOS
+		 * fb is large enough for the active pipe configuration.
+		 */
+		dev_priv->display.get_initial_plane_config(crtc,
+							   &plane_config);
+
+		/*
+		 * If the fb is shared between multiple heads, we'll
+		 * just get the first one.
+		 */
+		intel_find_initial_plane_obj(crtc, &plane_config);
+	}
+
+	/*
+	 * Make sure hardware watermarks really match the state we read out.
+	 * Note that we need to do this after reconstructing the BIOS fb's
+	 * since the watermark calculation done here will use pstate->fb.
+	 */
+	if (!HAS_GMCH(dev_priv))
+		sanitize_watermarks(dev);
+
+	/*
+	 * Force all active planes to recompute their states. So that on
+	 * mode_setcrtc after probe, all the intel_plane_state variables
+	 * are already calculated and there is no assert_plane warnings
+	 * during bootup.
+	 */
+	ret = intel_initial_commit(dev);
+	if (ret)
+		DRM_DEBUG_KMS("Initial commit in probe failed.\n");
+
+	return 0;
+}
+
+void i830_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+	/* 640x480@60Hz, ~25175 kHz */
+	struct dpll clock = {
+		.m1 = 18,
+		.m2 = 7,
+		.p1 = 13,
+		.p2 = 4,
+		.n = 2,
+	};
+	u32 dpll, fp;
+	int i;
+
+	WARN_ON(i9xx_calc_dpll_params(48000, &clock) != 25154);
+
+	DRM_DEBUG_KMS("enabling pipe %c due to force quirk (vco=%d dot=%d)\n",
+		      pipe_name(pipe), clock.vco, clock.dot);
+
+	fp = i9xx_dpll_compute_fp(&clock);
+	dpll = DPLL_DVO_2X_MODE |
+		DPLL_VGA_MODE_DIS |
+		((clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT) |
+		PLL_P2_DIVIDE_BY_4 |
+		PLL_REF_INPUT_DREFCLK |
+		DPLL_VCO_ENABLE;
+
+	I915_WRITE(FP0(pipe), fp);
+	I915_WRITE(FP1(pipe), fp);
+
+	I915_WRITE(HTOTAL(pipe), (640 - 1) | ((800 - 1) << 16));
+	I915_WRITE(HBLANK(pipe), (640 - 1) | ((800 - 1) << 16));
+	I915_WRITE(HSYNC(pipe), (656 - 1) | ((752 - 1) << 16));
+	I915_WRITE(VTOTAL(pipe), (480 - 1) | ((525 - 1) << 16));
+	I915_WRITE(VBLANK(pipe), (480 - 1) | ((525 - 1) << 16));
+	I915_WRITE(VSYNC(pipe), (490 - 1) | ((492 - 1) << 16));
+	I915_WRITE(PIPESRC(pipe), ((640 - 1) << 16) | (480 - 1));
+
+	/*
+	 * Apparently we need to have VGA mode enabled prior to changing
+	 * the P1/P2 dividers. Otherwise the DPLL will keep using the old
+	 * dividers, even though the register value does change.
+	 */
+	I915_WRITE(DPLL(pipe), dpll & ~DPLL_VGA_MODE_DIS);
+	I915_WRITE(DPLL(pipe), dpll);
+
+	/* Wait for the clocks to stabilize. */
+	POSTING_READ(DPLL(pipe));
+	udelay(150);
+
+	/* The pixel multiplier can only be updated once the
+	 * DPLL is enabled and the clocks are stable.
+	 *
+	 * So write it again.
+	 */
+	I915_WRITE(DPLL(pipe), dpll);
+
+	/* We do this three times for luck */
+	for (i = 0; i < 3 ; i++) {
+		I915_WRITE(DPLL(pipe), dpll);
+		POSTING_READ(DPLL(pipe));
+		udelay(150); /* wait for warmup */
+	}
+
+	I915_WRITE(PIPECONF(pipe), PIPECONF_ENABLE | PIPECONF_PROGRESSIVE);
+	POSTING_READ(PIPECONF(pipe));
+
+	intel_wait_for_pipe_scanline_moving(crtc);
+}
+
+void i830_disable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+
+	DRM_DEBUG_KMS("disabling pipe %c due to force quirk\n",
+		      pipe_name(pipe));
+
+	WARN_ON(I915_READ(DSPCNTR(PLANE_A)) & DISPLAY_PLANE_ENABLE);
+	WARN_ON(I915_READ(DSPCNTR(PLANE_B)) & DISPLAY_PLANE_ENABLE);
+	WARN_ON(I915_READ(DSPCNTR(PLANE_C)) & DISPLAY_PLANE_ENABLE);
+	WARN_ON(I915_READ(CURCNTR(PIPE_A)) & MCURSOR_MODE);
+	WARN_ON(I915_READ(CURCNTR(PIPE_B)) & MCURSOR_MODE);
+
+	I915_WRITE(PIPECONF(pipe), 0);
+	POSTING_READ(PIPECONF(pipe));
+
+	intel_wait_for_pipe_scanline_stopped(crtc);
+
+	I915_WRITE(DPLL(pipe), DPLL_VGA_MODE_DIS);
+	POSTING_READ(DPLL(pipe));
+}
+
+static void
+intel_sanitize_plane_mapping(struct drm_i915_private *dev_priv)
+{
+	struct intel_crtc *crtc;
+
+	if (INTEL_GEN(dev_priv) >= 4)
+		return;
+
+	for_each_intel_crtc(&dev_priv->drm, crtc) {
+		struct intel_plane *plane =
+			to_intel_plane(crtc->base.primary);
+		struct intel_crtc *plane_crtc;
+		enum pipe pipe;
+
+		if (!plane->get_hw_state(plane, &pipe))
+			continue;
+
+		if (pipe == crtc->pipe)
+			continue;
+
+		DRM_DEBUG_KMS("[PLANE:%d:%s] attached to the wrong pipe, disabling plane\n",
+			      plane->base.base.id, plane->base.name);
+
+		plane_crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+		intel_plane_disable_noatomic(plane_crtc, plane);
+	}
+}
+
+static bool intel_crtc_has_encoders(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct intel_encoder *encoder;
+
+	for_each_encoder_on_crtc(dev, &crtc->base, encoder)
+		return true;
+
+	return false;
+}
+
+static struct intel_connector *intel_encoder_find_connector(struct intel_encoder *encoder)
+{
+	struct drm_device *dev = encoder->base.dev;
+	struct intel_connector *connector;
+
+	for_each_connector_on_encoder(dev, &encoder->base, connector)
+		return connector;
+
+	return NULL;
+}
+
+static bool has_pch_trancoder(struct drm_i915_private *dev_priv,
+			      enum pipe pch_transcoder)
+{
+	return HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv) ||
+		(HAS_PCH_LPT_H(dev_priv) && pch_transcoder == PIPE_A);
+}
+
+static void intel_sanitize_crtc(struct intel_crtc *crtc,
+				struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	/* Clear any frame start delays used for debugging left by the BIOS */
+	if (crtc->active && !transcoder_is_dsi(cpu_transcoder)) {
+		i915_reg_t reg = PIPECONF(cpu_transcoder);
+
+		I915_WRITE(reg,
+			   I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
+	}
+
+	if (crtc_state->base.active) {
+		struct intel_plane *plane;
+
+		/* Disable everything but the primary plane */
+		for_each_intel_plane_on_crtc(dev, crtc, plane) {
+			const struct intel_plane_state *plane_state =
+				to_intel_plane_state(plane->base.state);
+
+			if (plane_state->base.visible &&
+			    plane->base.type != DRM_PLANE_TYPE_PRIMARY)
+				intel_plane_disable_noatomic(crtc, plane);
+		}
+
+		/*
+		 * Disable any background color set by the BIOS, but enable the
+		 * gamma and CSC to match how we program our planes.
+		 */
+		if (INTEL_GEN(dev_priv) >= 9)
+			I915_WRITE(SKL_BOTTOM_COLOR(crtc->pipe),
+				   SKL_BOTTOM_COLOR_GAMMA_ENABLE |
+				   SKL_BOTTOM_COLOR_CSC_ENABLE);
+	}
+
+	/* Adjust the state of the output pipe according to whether we
+	 * have active connectors/encoders. */
+	if (crtc_state->base.active && !intel_crtc_has_encoders(crtc))
+		intel_crtc_disable_noatomic(&crtc->base, ctx);
+
+	if (crtc_state->base.active || HAS_GMCH(dev_priv)) {
+		/*
+		 * We start out with underrun reporting disabled to avoid races.
+		 * For correct bookkeeping mark this on active crtcs.
+		 *
+		 * Also on gmch platforms we dont have any hardware bits to
+		 * disable the underrun reporting. Which means we need to start
+		 * out with underrun reporting disabled also on inactive pipes,
+		 * since otherwise we'll complain about the garbage we read when
+		 * e.g. coming up after runtime pm.
+		 *
+		 * No protection against concurrent access is required - at
+		 * worst a fifo underrun happens which also sets this to false.
+		 */
+		crtc->cpu_fifo_underrun_disabled = true;
+		/*
+		 * We track the PCH trancoder underrun reporting state
+		 * within the crtc. With crtc for pipe A housing the underrun
+		 * reporting state for PCH transcoder A, crtc for pipe B housing
+		 * it for PCH transcoder B, etc. LPT-H has only PCH transcoder A,
+		 * and marking underrun reporting as disabled for the non-existing
+		 * PCH transcoders B and C would prevent enabling the south
+		 * error interrupt (see cpt_can_enable_serr_int()).
+		 */
+		if (has_pch_trancoder(dev_priv, crtc->pipe))
+			crtc->pch_fifo_underrun_disabled = true;
+	}
+}
+
+static bool has_bogus_dpll_config(const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	/*
+	 * Some SNB BIOSen (eg. ASUS K53SV) are known to misprogram
+	 * the hardware when a high res displays plugged in. DPLL P
+	 * divider is zero, and the pipe timings are bonkers. We'll
+	 * try to disable everything in that case.
+	 *
+	 * FIXME would be nice to be able to sanitize this state
+	 * without several WARNs, but for now let's take the easy
+	 * road.
+	 */
+	return IS_GEN(dev_priv, 6) &&
+		crtc_state->base.active &&
+		crtc_state->shared_dpll &&
+		crtc_state->port_clock == 0;
+}
+
+static void intel_sanitize_encoder(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_connector *connector;
+	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
+	struct intel_crtc_state *crtc_state = crtc ?
+		to_intel_crtc_state(crtc->base.state) : NULL;
+
+	/* We need to check both for a crtc link (meaning that the
+	 * encoder is active and trying to read from a pipe) and the
+	 * pipe itself being active. */
+	bool has_active_crtc = crtc_state &&
+		crtc_state->base.active;
+
+	if (crtc_state && has_bogus_dpll_config(crtc_state)) {
+		DRM_DEBUG_KMS("BIOS has misprogrammed the hardware. Disabling pipe %c\n",
+			      pipe_name(crtc->pipe));
+		has_active_crtc = false;
+	}
+
+	connector = intel_encoder_find_connector(encoder);
+	if (connector && !has_active_crtc) {
+		DRM_DEBUG_KMS("[ENCODER:%d:%s] has active connectors but no active pipe!\n",
+			      encoder->base.base.id,
+			      encoder->base.name);
+
+		/* Connector is active, but has no active pipe. This is
+		 * fallout from our resume register restoring. Disable
+		 * the encoder manually again. */
+		if (crtc_state) {
+			struct drm_encoder *best_encoder;
+
+			DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
+				      encoder->base.base.id,
+				      encoder->base.name);
+
+			/* avoid oopsing in case the hooks consult best_encoder */
+			best_encoder = connector->base.state->best_encoder;
+			connector->base.state->best_encoder = &encoder->base;
+
+			if (encoder->disable)
+				encoder->disable(encoder, crtc_state,
+						 connector->base.state);
+			if (encoder->post_disable)
+				encoder->post_disable(encoder, crtc_state,
+						      connector->base.state);
+
+			connector->base.state->best_encoder = best_encoder;
+		}
+		encoder->base.crtc = NULL;
+
+		/* Inconsistent output/port/pipe state happens presumably due to
+		 * a bug in one of the get_hw_state functions. Or someplace else
+		 * in our code, like the register restore mess on resume. Clamp
+		 * things to off as a safer default. */
+
+		connector->base.dpms = DRM_MODE_DPMS_OFF;
+		connector->base.encoder = NULL;
+	}
+
+	/* notify opregion of the sanitized encoder state */
+	intel_opregion_notify_encoder(encoder, connector && has_active_crtc);
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		icl_sanitize_encoder_pll_mapping(encoder);
+}
+
+void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv)
+{
+	i915_reg_t vga_reg = i915_vgacntrl_reg(dev_priv);
+
+	if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
+		DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
+		i915_disable_vga(dev_priv);
+	}
+}
+
+void i915_redisable_vga(struct drm_i915_private *dev_priv)
+{
+	intel_wakeref_t wakeref;
+
+	/*
+	 * This function can be called both from intel_modeset_setup_hw_state or
+	 * at a very early point in our resume sequence, where the power well
+	 * structures are not yet restored. Since this function is at a very
+	 * paranoid "someone might have enabled VGA while we were not looking"
+	 * level, just check if the power well is enabled instead of trying to
+	 * follow the "don't touch the power well if we don't need it" policy
+	 * the rest of the driver uses.
+	 */
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_VGA);
+	if (!wakeref)
+		return;
+
+	i915_redisable_vga_power_on(dev_priv);
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_VGA, wakeref);
+}
+
+/* FIXME read out full plane state for all planes */
+static void readout_plane_state(struct drm_i915_private *dev_priv)
+{
+	struct intel_plane *plane;
+	struct intel_crtc *crtc;
+
+	for_each_intel_plane(&dev_priv->drm, plane) {
+		struct intel_plane_state *plane_state =
+			to_intel_plane_state(plane->base.state);
+		struct intel_crtc_state *crtc_state;
+		enum pipe pipe = PIPE_A;
+		bool visible;
+
+		visible = plane->get_hw_state(plane, &pipe);
+
+		crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+		crtc_state = to_intel_crtc_state(crtc->base.state);
+
+		intel_set_plane_visible(crtc_state, plane_state, visible);
+
+		DRM_DEBUG_KMS("[PLANE:%d:%s] hw state readout: %s, pipe %c\n",
+			      plane->base.base.id, plane->base.name,
+			      enableddisabled(visible), pipe_name(pipe));
+	}
+
+	for_each_intel_crtc(&dev_priv->drm, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+
+		fixup_active_planes(crtc_state);
+	}
+}
+
+static void intel_modeset_readout_hw_state(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe;
+	struct intel_crtc *crtc;
+	struct intel_encoder *encoder;
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	int i;
+
+	dev_priv->active_crtcs = 0;
+
+	for_each_intel_crtc(dev, crtc) {
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+
+		__drm_atomic_helper_crtc_destroy_state(&crtc_state->base);
+		memset(crtc_state, 0, sizeof(*crtc_state));
+		__drm_atomic_helper_crtc_reset(&crtc->base, &crtc_state->base);
+
+		crtc_state->base.active = crtc_state->base.enable =
+			dev_priv->display.get_pipe_config(crtc, crtc_state);
+
+		crtc->base.enabled = crtc_state->base.enable;
+		crtc->active = crtc_state->base.active;
+
+		if (crtc_state->base.active)
+			dev_priv->active_crtcs |= 1 << crtc->pipe;
+
+		DRM_DEBUG_KMS("[CRTC:%d:%s] hw state readout: %s\n",
+			      crtc->base.base.id, crtc->base.name,
+			      enableddisabled(crtc_state->base.active));
+	}
+
+	readout_plane_state(dev_priv);
+
+	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+		struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
+
+		pll->on = pll->info->funcs->get_hw_state(dev_priv, pll,
+							&pll->state.hw_state);
+		pll->state.crtc_mask = 0;
+		for_each_intel_crtc(dev, crtc) {
+			struct intel_crtc_state *crtc_state =
+				to_intel_crtc_state(crtc->base.state);
+
+			if (crtc_state->base.active &&
+			    crtc_state->shared_dpll == pll)
+				pll->state.crtc_mask |= 1 << crtc->pipe;
+		}
+		pll->active_mask = pll->state.crtc_mask;
+
+		DRM_DEBUG_KMS("%s hw state readout: crtc_mask 0x%08x, on %i\n",
+			      pll->info->name, pll->state.crtc_mask, pll->on);
+	}
+
+	for_each_intel_encoder(dev, encoder) {
+		pipe = 0;
+
+		if (encoder->get_hw_state(encoder, &pipe)) {
+			struct intel_crtc_state *crtc_state;
+
+			crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+			crtc_state = to_intel_crtc_state(crtc->base.state);
+
+			encoder->base.crtc = &crtc->base;
+			encoder->get_config(encoder, crtc_state);
+		} else {
+			encoder->base.crtc = NULL;
+		}
+
+		DRM_DEBUG_KMS("[ENCODER:%d:%s] hw state readout: %s, pipe %c\n",
+			      encoder->base.base.id, encoder->base.name,
+			      enableddisabled(encoder->base.crtc),
+			      pipe_name(pipe));
+	}
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (connector->get_hw_state(connector)) {
+			connector->base.dpms = DRM_MODE_DPMS_ON;
+
+			encoder = connector->encoder;
+			connector->base.encoder = &encoder->base;
+
+			if (encoder->base.crtc &&
+			    encoder->base.crtc->state->active) {
+				/*
+				 * This has to be done during hardware readout
+				 * because anything calling .crtc_disable may
+				 * rely on the connector_mask being accurate.
+				 */
+				encoder->base.crtc->state->connector_mask |=
+					drm_connector_mask(&connector->base);
+				encoder->base.crtc->state->encoder_mask |=
+					drm_encoder_mask(&encoder->base);
+			}
+
+		} else {
+			connector->base.dpms = DRM_MODE_DPMS_OFF;
+			connector->base.encoder = NULL;
+		}
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] hw state readout: %s\n",
+			      connector->base.base.id, connector->base.name,
+			      enableddisabled(connector->base.encoder));
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	for_each_intel_crtc(dev, crtc) {
+		struct intel_bw_state *bw_state =
+			to_intel_bw_state(dev_priv->bw_obj.state);
+		struct intel_crtc_state *crtc_state =
+			to_intel_crtc_state(crtc->base.state);
+		struct intel_plane *plane;
+		int min_cdclk = 0;
+
+		memset(&crtc->base.mode, 0, sizeof(crtc->base.mode));
+		if (crtc_state->base.active) {
+			intel_mode_from_pipe_config(&crtc->base.mode, crtc_state);
+			crtc->base.mode.hdisplay = crtc_state->pipe_src_w;
+			crtc->base.mode.vdisplay = crtc_state->pipe_src_h;
+			intel_mode_from_pipe_config(&crtc_state->base.adjusted_mode, crtc_state);
+			WARN_ON(drm_atomic_set_mode_for_crtc(crtc->base.state, &crtc->base.mode));
+
+			/*
+			 * The initial mode needs to be set in order to keep
+			 * the atomic core happy. It wants a valid mode if the
+			 * crtc's enabled, so we do the above call.
+			 *
+			 * But we don't set all the derived state fully, hence
+			 * set a flag to indicate that a full recalculation is
+			 * needed on the next commit.
+			 */
+			crtc_state->base.mode.private_flags = I915_MODE_FLAG_INHERITED;
+
+			intel_crtc_compute_pixel_rate(crtc_state);
+
+			if (dev_priv->display.modeset_calc_cdclk) {
+				min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
+				if (WARN_ON(min_cdclk < 0))
+					min_cdclk = 0;
+			}
+
+			drm_calc_timestamping_constants(&crtc->base,
+							&crtc_state->base.adjusted_mode);
+			update_scanline_offset(crtc_state);
+		}
+
+		dev_priv->min_cdclk[crtc->pipe] = min_cdclk;
+		dev_priv->min_voltage_level[crtc->pipe] =
+			crtc_state->min_voltage_level;
+
+		for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
+			const struct intel_plane_state *plane_state =
+				to_intel_plane_state(plane->base.state);
+
+			/*
+			 * FIXME don't have the fb yet, so can't
+			 * use intel_plane_data_rate() :(
+			 */
+			if (plane_state->base.visible)
+				crtc_state->data_rate[plane->id] =
+					4 * crtc_state->pixel_rate;
+		}
+
+		intel_bw_crtc_update(bw_state, crtc_state);
+
+		intel_pipe_config_sanity_check(dev_priv, crtc_state);
+	}
+}
+
+static void
+get_encoder_power_domains(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		struct intel_crtc_state *crtc_state;
+
+		if (!encoder->get_power_domains)
+			continue;
+
+		/*
+		 * MST-primary and inactive encoders don't have a crtc state
+		 * and neither of these require any power domain references.
+		 */
+		if (!encoder->base.crtc)
+			continue;
+
+		crtc_state = to_intel_crtc_state(encoder->base.crtc->state);
+		encoder->get_power_domains(encoder, crtc_state);
+	}
+}
+
+static void intel_early_display_was(struct drm_i915_private *dev_priv)
+{
+	/* Display WA #1185 WaDisableDARBFClkGating:cnl,glk */
+	if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+		I915_WRITE(GEN9_CLKGATE_DIS_0, I915_READ(GEN9_CLKGATE_DIS_0) |
+			   DARBF_GATING_DIS);
+
+	if (IS_HASWELL(dev_priv)) {
+		/*
+		 * WaRsPkgCStateDisplayPMReq:hsw
+		 * System hang if this isn't done before disabling all planes!
+		 */
+		I915_WRITE(CHICKEN_PAR1_1,
+			   I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
+	}
+}
+
+static void ibx_sanitize_pch_hdmi_port(struct drm_i915_private *dev_priv,
+				       enum port port, i915_reg_t hdmi_reg)
+{
+	u32 val = I915_READ(hdmi_reg);
+
+	if (val & SDVO_ENABLE ||
+	    (val & SDVO_PIPE_SEL_MASK) == SDVO_PIPE_SEL(PIPE_A))
+		return;
+
+	DRM_DEBUG_KMS("Sanitizing transcoder select for HDMI %c\n",
+		      port_name(port));
+
+	val &= ~SDVO_PIPE_SEL_MASK;
+	val |= SDVO_PIPE_SEL(PIPE_A);
+
+	I915_WRITE(hdmi_reg, val);
+}
+
+static void ibx_sanitize_pch_dp_port(struct drm_i915_private *dev_priv,
+				     enum port port, i915_reg_t dp_reg)
+{
+	u32 val = I915_READ(dp_reg);
+
+	if (val & DP_PORT_EN ||
+	    (val & DP_PIPE_SEL_MASK) == DP_PIPE_SEL(PIPE_A))
+		return;
+
+	DRM_DEBUG_KMS("Sanitizing transcoder select for DP %c\n",
+		      port_name(port));
+
+	val &= ~DP_PIPE_SEL_MASK;
+	val |= DP_PIPE_SEL(PIPE_A);
+
+	I915_WRITE(dp_reg, val);
+}
+
+static void ibx_sanitize_pch_ports(struct drm_i915_private *dev_priv)
+{
+	/*
+	 * The BIOS may select transcoder B on some of the PCH
+	 * ports even it doesn't enable the port. This would trip
+	 * assert_pch_dp_disabled() and assert_pch_hdmi_disabled().
+	 * Sanitize the transcoder select bits to prevent that. We
+	 * assume that the BIOS never actually enabled the port,
+	 * because if it did we'd actually have to toggle the port
+	 * on and back off to make the transcoder A select stick
+	 * (see. intel_dp_link_down(), intel_disable_hdmi(),
+	 * intel_disable_sdvo()).
+	 */
+	ibx_sanitize_pch_dp_port(dev_priv, PORT_B, PCH_DP_B);
+	ibx_sanitize_pch_dp_port(dev_priv, PORT_C, PCH_DP_C);
+	ibx_sanitize_pch_dp_port(dev_priv, PORT_D, PCH_DP_D);
+
+	/* PCH SDVOB multiplex with HDMIB */
+	ibx_sanitize_pch_hdmi_port(dev_priv, PORT_B, PCH_HDMIB);
+	ibx_sanitize_pch_hdmi_port(dev_priv, PORT_C, PCH_HDMIC);
+	ibx_sanitize_pch_hdmi_port(dev_priv, PORT_D, PCH_HDMID);
+}
+
+/* Scan out the current hw modeset state,
+ * and sanitizes it to the current state
+ */
+static void
+intel_modeset_setup_hw_state(struct drm_device *dev,
+			     struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc_state *crtc_state;
+	struct intel_encoder *encoder;
+	struct intel_crtc *crtc;
+	intel_wakeref_t wakeref;
+	int i;
+
+	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+
+	intel_early_display_was(dev_priv);
+	intel_modeset_readout_hw_state(dev);
+
+	/* HW state is read out, now we need to sanitize this mess. */
+	get_encoder_power_domains(dev_priv);
+
+	if (HAS_PCH_IBX(dev_priv))
+		ibx_sanitize_pch_ports(dev_priv);
+
+	/*
+	 * intel_sanitize_plane_mapping() may need to do vblank
+	 * waits, so we need vblank interrupts restored beforehand.
+	 */
+	for_each_intel_crtc(&dev_priv->drm, crtc) {
+		crtc_state = to_intel_crtc_state(crtc->base.state);
+
+		drm_crtc_vblank_reset(&crtc->base);
+
+		if (crtc_state->base.active)
+			intel_crtc_vblank_on(crtc_state);
+	}
+
+	intel_sanitize_plane_mapping(dev_priv);
+
+	for_each_intel_encoder(dev, encoder)
+		intel_sanitize_encoder(encoder);
+
+	for_each_intel_crtc(&dev_priv->drm, crtc) {
+		crtc_state = to_intel_crtc_state(crtc->base.state);
+		intel_sanitize_crtc(crtc, ctx);
+		intel_dump_pipe_config(crtc_state, NULL, "[setup_hw_state]");
+	}
+
+	intel_modeset_update_connector_atomic_state(dev);
+
+	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+		struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
+
+		if (!pll->on || pll->active_mask)
+			continue;
+
+		DRM_DEBUG_KMS("%s enabled but not in use, disabling\n",
+			      pll->info->name);
+
+		pll->info->funcs->disable(dev_priv, pll);
+		pll->on = false;
+	}
+
+	if (IS_G4X(dev_priv)) {
+		g4x_wm_get_hw_state(dev_priv);
+		g4x_wm_sanitize(dev_priv);
+	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		vlv_wm_get_hw_state(dev_priv);
+		vlv_wm_sanitize(dev_priv);
+	} else if (INTEL_GEN(dev_priv) >= 9) {
+		skl_wm_get_hw_state(dev_priv);
+	} else if (HAS_PCH_SPLIT(dev_priv)) {
+		ilk_wm_get_hw_state(dev_priv);
+	}
+
+	for_each_intel_crtc(dev, crtc) {
+		u64 put_domains;
+
+		crtc_state = to_intel_crtc_state(crtc->base.state);
+		put_domains = modeset_get_crtc_power_domains(&crtc->base, crtc_state);
+		if (WARN_ON(put_domains))
+			modeset_put_power_domains(dev_priv, put_domains);
+	}
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
+
+	intel_fbc_init_pipe_state(dev_priv);
+}
+
+void intel_display_resume(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_atomic_state *state = dev_priv->modeset_restore_state;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+
+	dev_priv->modeset_restore_state = NULL;
+	if (state)
+		state->acquire_ctx = &ctx;
+
+	drm_modeset_acquire_init(&ctx, 0);
+
+	while (1) {
+		ret = drm_modeset_lock_all_ctx(dev, &ctx);
+		if (ret != -EDEADLK)
+			break;
+
+		drm_modeset_backoff(&ctx);
+	}
+
+	if (!ret)
+		ret = __intel_display_resume(dev, state, &ctx);
+
+	intel_enable_ipc(dev_priv);
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+
+	if (ret)
+		DRM_ERROR("Restoring old state failed with %i\n", ret);
+	if (state)
+		drm_atomic_state_put(state);
+}
+
+static void intel_hpd_poll_fini(struct drm_device *dev)
+{
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+
+	/* Kill all the work that may have been queued by hpd. */
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (connector->modeset_retry_work.func)
+			cancel_work_sync(&connector->modeset_retry_work);
+		if (connector->hdcp.shim) {
+			cancel_delayed_work_sync(&connector->hdcp.check_work);
+			cancel_work_sync(&connector->hdcp.prop_work);
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+}
+
+void intel_modeset_cleanup(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	flush_workqueue(dev_priv->modeset_wq);
+
+	flush_work(&dev_priv->atomic_helper.free_work);
+	WARN_ON(!llist_empty(&dev_priv->atomic_helper.free_list));
+
+	/*
+	 * Interrupts and polling as the first thing to avoid creating havoc.
+	 * Too much stuff here (turning of connectors, ...) would
+	 * experience fancy races otherwise.
+	 */
+	intel_irq_uninstall(dev_priv);
+
+	/*
+	 * Due to the hpd irq storm handling the hotplug work can re-arm the
+	 * poll handlers. Hence disable polling after hpd handling is shut down.
+	 */
+	intel_hpd_poll_fini(dev);
+
+	/* poll work can call into fbdev, hence clean that up afterwards */
+	intel_fbdev_fini(dev_priv);
+
+	intel_unregister_dsm_handler();
+
+	intel_fbc_global_disable(dev_priv);
+
+	/* flush any delayed tasks or pending work */
+	flush_scheduled_work();
+
+	intel_hdcp_component_fini(dev_priv);
+
+	drm_mode_config_cleanup(dev);
+
+	intel_overlay_cleanup(dev_priv);
+
+	intel_gmbus_teardown(dev_priv);
+
+	destroy_workqueue(dev_priv->modeset_wq);
+
+	intel_fbc_cleanup_cfb(dev_priv);
+}
+
+/*
+ * set vga decode state - true == enable VGA decode
+ */
+int intel_modeset_vga_set_state(struct drm_i915_private *dev_priv, bool state)
+{
+	unsigned reg = INTEL_GEN(dev_priv) >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL;
+	u16 gmch_ctrl;
+
+	if (pci_read_config_word(dev_priv->bridge_dev, reg, &gmch_ctrl)) {
+		DRM_ERROR("failed to read control word\n");
+		return -EIO;
+	}
+
+	if (!!(gmch_ctrl & INTEL_GMCH_VGA_DISABLE) == !state)
+		return 0;
+
+	if (state)
+		gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
+	else
+		gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
+
+	if (pci_write_config_word(dev_priv->bridge_dev, reg, gmch_ctrl)) {
+		DRM_ERROR("failed to write control word\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+
+struct intel_display_error_state {
+
+	u32 power_well_driver;
+
+	struct intel_cursor_error_state {
+		u32 control;
+		u32 position;
+		u32 base;
+		u32 size;
+	} cursor[I915_MAX_PIPES];
+
+	struct intel_pipe_error_state {
+		bool power_domain_on;
+		u32 source;
+		u32 stat;
+	} pipe[I915_MAX_PIPES];
+
+	struct intel_plane_error_state {
+		u32 control;
+		u32 stride;
+		u32 size;
+		u32 pos;
+		u32 addr;
+		u32 surface;
+		u32 tile_offset;
+	} plane[I915_MAX_PIPES];
+
+	struct intel_transcoder_error_state {
+		bool available;
+		bool power_domain_on;
+		enum transcoder cpu_transcoder;
+
+		u32 conf;
+
+		u32 htotal;
+		u32 hblank;
+		u32 hsync;
+		u32 vtotal;
+		u32 vblank;
+		u32 vsync;
+	} transcoder[4];
+};
+
+struct intel_display_error_state *
+intel_display_capture_error_state(struct drm_i915_private *dev_priv)
+{
+	struct intel_display_error_state *error;
+	int transcoders[] = {
+		TRANSCODER_A,
+		TRANSCODER_B,
+		TRANSCODER_C,
+		TRANSCODER_EDP,
+	};
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(transcoders) != ARRAY_SIZE(error->transcoder));
+
+	if (!HAS_DISPLAY(dev_priv))
+		return NULL;
+
+	error = kzalloc(sizeof(*error), GFP_ATOMIC);
+	if (error == NULL)
+		return NULL;
+
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		error->power_well_driver = I915_READ(HSW_PWR_WELL_CTL2);
+
+	for_each_pipe(dev_priv, i) {
+		error->pipe[i].power_domain_on =
+			__intel_display_power_is_enabled(dev_priv,
+							 POWER_DOMAIN_PIPE(i));
+		if (!error->pipe[i].power_domain_on)
+			continue;
+
+		error->cursor[i].control = I915_READ(CURCNTR(i));
+		error->cursor[i].position = I915_READ(CURPOS(i));
+		error->cursor[i].base = I915_READ(CURBASE(i));
+
+		error->plane[i].control = I915_READ(DSPCNTR(i));
+		error->plane[i].stride = I915_READ(DSPSTRIDE(i));
+		if (INTEL_GEN(dev_priv) <= 3) {
+			error->plane[i].size = I915_READ(DSPSIZE(i));
+			error->plane[i].pos = I915_READ(DSPPOS(i));
+		}
+		if (INTEL_GEN(dev_priv) <= 7 && !IS_HASWELL(dev_priv))
+			error->plane[i].addr = I915_READ(DSPADDR(i));
+		if (INTEL_GEN(dev_priv) >= 4) {
+			error->plane[i].surface = I915_READ(DSPSURF(i));
+			error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
+		}
+
+		error->pipe[i].source = I915_READ(PIPESRC(i));
+
+		if (HAS_GMCH(dev_priv))
+			error->pipe[i].stat = I915_READ(PIPESTAT(i));
+	}
+
+	for (i = 0; i < ARRAY_SIZE(error->transcoder); i++) {
+		enum transcoder cpu_transcoder = transcoders[i];
+
+		if (!INTEL_INFO(dev_priv)->trans_offsets[cpu_transcoder])
+			continue;
+
+		error->transcoder[i].available = true;
+		error->transcoder[i].power_domain_on =
+			__intel_display_power_is_enabled(dev_priv,
+				POWER_DOMAIN_TRANSCODER(cpu_transcoder));
+		if (!error->transcoder[i].power_domain_on)
+			continue;
+
+		error->transcoder[i].cpu_transcoder = cpu_transcoder;
+
+		error->transcoder[i].conf = I915_READ(PIPECONF(cpu_transcoder));
+		error->transcoder[i].htotal = I915_READ(HTOTAL(cpu_transcoder));
+		error->transcoder[i].hblank = I915_READ(HBLANK(cpu_transcoder));
+		error->transcoder[i].hsync = I915_READ(HSYNC(cpu_transcoder));
+		error->transcoder[i].vtotal = I915_READ(VTOTAL(cpu_transcoder));
+		error->transcoder[i].vblank = I915_READ(VBLANK(cpu_transcoder));
+		error->transcoder[i].vsync = I915_READ(VSYNC(cpu_transcoder));
+	}
+
+	return error;
+}
+
+#define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
+
+void
+intel_display_print_error_state(struct drm_i915_error_state_buf *m,
+				struct intel_display_error_state *error)
+{
+	struct drm_i915_private *dev_priv = m->i915;
+	int i;
+
+	if (!error)
+		return;
+
+	err_printf(m, "Num Pipes: %d\n", INTEL_INFO(dev_priv)->num_pipes);
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		err_printf(m, "PWR_WELL_CTL2: %08x\n",
+			   error->power_well_driver);
+	for_each_pipe(dev_priv, i) {
+		err_printf(m, "Pipe [%d]:\n", i);
+		err_printf(m, "  Power: %s\n",
+			   onoff(error->pipe[i].power_domain_on));
+		err_printf(m, "  SRC: %08x\n", error->pipe[i].source);
+		err_printf(m, "  STAT: %08x\n", error->pipe[i].stat);
+
+		err_printf(m, "Plane [%d]:\n", i);
+		err_printf(m, "  CNTR: %08x\n", error->plane[i].control);
+		err_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
+		if (INTEL_GEN(dev_priv) <= 3) {
+			err_printf(m, "  SIZE: %08x\n", error->plane[i].size);
+			err_printf(m, "  POS: %08x\n", error->plane[i].pos);
+		}
+		if (INTEL_GEN(dev_priv) <= 7 && !IS_HASWELL(dev_priv))
+			err_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
+		if (INTEL_GEN(dev_priv) >= 4) {
+			err_printf(m, "  SURF: %08x\n", error->plane[i].surface);
+			err_printf(m, "  TILEOFF: %08x\n", error->plane[i].tile_offset);
+		}
+
+		err_printf(m, "Cursor [%d]:\n", i);
+		err_printf(m, "  CNTR: %08x\n", error->cursor[i].control);
+		err_printf(m, "  POS: %08x\n", error->cursor[i].position);
+		err_printf(m, "  BASE: %08x\n", error->cursor[i].base);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(error->transcoder); i++) {
+		if (!error->transcoder[i].available)
+			continue;
+
+		err_printf(m, "CPU transcoder: %s\n",
+			   transcoder_name(error->transcoder[i].cpu_transcoder));
+		err_printf(m, "  Power: %s\n",
+			   onoff(error->transcoder[i].power_domain_on));
+		err_printf(m, "  CONF: %08x\n", error->transcoder[i].conf);
+		err_printf(m, "  HTOTAL: %08x\n", error->transcoder[i].htotal);
+		err_printf(m, "  HBLANK: %08x\n", error->transcoder[i].hblank);
+		err_printf(m, "  HSYNC: %08x\n", error->transcoder[i].hsync);
+		err_printf(m, "  VTOTAL: %08x\n", error->transcoder[i].vtotal);
+		err_printf(m, "  VBLANK: %08x\n", error->transcoder[i].vblank);
+		err_printf(m, "  VSYNC: %08x\n", error->transcoder[i].vsync);
+	}
+}
+
+#endif
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
new file mode 100644
index 000000000000..ee6b8194a459
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -0,0 +1,361 @@
+/*
+ * Copyright © 2006-2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef _INTEL_DISPLAY_H_
+#define _INTEL_DISPLAY_H_
+
+#include <drm/drm_util.h>
+#include <drm/i915_drm.h>
+
+struct drm_i915_private;
+struct intel_plane_state;
+
+enum i915_gpio {
+	GPIOA,
+	GPIOB,
+	GPIOC,
+	GPIOD,
+	GPIOE,
+	GPIOF,
+	GPIOG,
+	GPIOH,
+	__GPIOI_UNUSED,
+	GPIOJ,
+	GPIOK,
+	GPIOL,
+	GPIOM,
+};
+
+/*
+ * Keep the pipe enum values fixed: the code assumes that PIPE_A=0, the
+ * rest have consecutive values and match the enum values of transcoders
+ * with a 1:1 transcoder -> pipe mapping.
+ */
+enum pipe {
+	INVALID_PIPE = -1,
+
+	PIPE_A = 0,
+	PIPE_B,
+	PIPE_C,
+	_PIPE_EDP,
+
+	I915_MAX_PIPES = _PIPE_EDP
+};
+
+#define pipe_name(p) ((p) + 'A')
+
+enum transcoder {
+	/*
+	 * The following transcoders have a 1:1 transcoder -> pipe mapping,
+	 * keep their values fixed: the code assumes that TRANSCODER_A=0, the
+	 * rest have consecutive values and match the enum values of the pipes
+	 * they map to.
+	 */
+	TRANSCODER_A = PIPE_A,
+	TRANSCODER_B = PIPE_B,
+	TRANSCODER_C = PIPE_C,
+
+	/*
+	 * The following transcoders can map to any pipe, their enum value
+	 * doesn't need to stay fixed.
+	 */
+	TRANSCODER_EDP,
+	TRANSCODER_DSI_0,
+	TRANSCODER_DSI_1,
+	TRANSCODER_DSI_A = TRANSCODER_DSI_0,	/* legacy DSI */
+	TRANSCODER_DSI_C = TRANSCODER_DSI_1,	/* legacy DSI */
+
+	I915_MAX_TRANSCODERS
+};
+
+static inline const char *transcoder_name(enum transcoder transcoder)
+{
+	switch (transcoder) {
+	case TRANSCODER_A:
+		return "A";
+	case TRANSCODER_B:
+		return "B";
+	case TRANSCODER_C:
+		return "C";
+	case TRANSCODER_EDP:
+		return "EDP";
+	case TRANSCODER_DSI_A:
+		return "DSI A";
+	case TRANSCODER_DSI_C:
+		return "DSI C";
+	default:
+		return "<invalid>";
+	}
+}
+
+static inline bool transcoder_is_dsi(enum transcoder transcoder)
+{
+	return transcoder == TRANSCODER_DSI_A || transcoder == TRANSCODER_DSI_C;
+}
+
+/*
+ * Global legacy plane identifier. Valid only for primary/sprite
+ * planes on pre-g4x, and only for primary planes on g4x-bdw.
+ */
+enum i9xx_plane_id {
+	PLANE_A,
+	PLANE_B,
+	PLANE_C,
+};
+
+#define plane_name(p) ((p) + 'A')
+#define sprite_name(p, s) ((p) * RUNTIME_INFO(dev_priv)->num_sprites[(p)] + (s) + 'A')
+
+/*
+ * Per-pipe plane identifier.
+ * I915_MAX_PLANES in the enum below is the maximum (across all platforms)
+ * number of planes per CRTC.  Not all platforms really have this many planes,
+ * which means some arrays of size I915_MAX_PLANES may have unused entries
+ * between the topmost sprite plane and the cursor plane.
+ *
+ * This is expected to be passed to various register macros
+ * (eg. PLANE_CTL(), PS_PLANE_SEL(), etc.) so adjust with care.
+ */
+enum plane_id {
+	PLANE_PRIMARY,
+	PLANE_SPRITE0,
+	PLANE_SPRITE1,
+	PLANE_SPRITE2,
+	PLANE_SPRITE3,
+	PLANE_SPRITE4,
+	PLANE_SPRITE5,
+	PLANE_CURSOR,
+
+	I915_MAX_PLANES,
+};
+
+#define for_each_plane_id_on_crtc(__crtc, __p) \
+	for ((__p) = PLANE_PRIMARY; (__p) < I915_MAX_PLANES; (__p)++) \
+		for_each_if((__crtc)->plane_ids_mask & BIT(__p))
+
+/*
+ * Ports identifier referenced from other drivers.
+ * Expected to remain stable over time
+ */
+static inline const char *port_identifier(enum port port)
+{
+	switch (port) {
+	case PORT_A:
+		return "Port A";
+	case PORT_B:
+		return "Port B";
+	case PORT_C:
+		return "Port C";
+	case PORT_D:
+		return "Port D";
+	case PORT_E:
+		return "Port E";
+	case PORT_F:
+		return "Port F";
+	default:
+		return "<invalid>";
+	}
+}
+
+enum tc_port {
+	PORT_TC_NONE = -1,
+
+	PORT_TC1 = 0,
+	PORT_TC2,
+	PORT_TC3,
+	PORT_TC4,
+
+	I915_MAX_TC_PORTS
+};
+
+enum tc_port_type {
+	TC_PORT_UNKNOWN = 0,
+	TC_PORT_TYPEC,
+	TC_PORT_TBT,
+	TC_PORT_LEGACY,
+};
+
+enum dpio_channel {
+	DPIO_CH0,
+	DPIO_CH1
+};
+
+enum dpio_phy {
+	DPIO_PHY0,
+	DPIO_PHY1,
+	DPIO_PHY2,
+};
+
+#define I915_NUM_PHYS_VLV 2
+
+enum aux_ch {
+	AUX_CH_A,
+	AUX_CH_B,
+	AUX_CH_C,
+	AUX_CH_D,
+	AUX_CH_E, /* ICL+ */
+	AUX_CH_F,
+};
+
+#define aux_ch_name(a) ((a) + 'A')
+
+/* Used by dp and fdi links */
+struct intel_link_m_n {
+	u32 tu;
+	u32 gmch_m;
+	u32 gmch_n;
+	u32 link_m;
+	u32 link_n;
+};
+
+#define for_each_pipe(__dev_priv, __p) \
+	for ((__p) = 0; (__p) < INTEL_INFO(__dev_priv)->num_pipes; (__p)++)
+
+#define for_each_pipe_masked(__dev_priv, __p, __mask) \
+	for ((__p) = 0; (__p) < INTEL_INFO(__dev_priv)->num_pipes; (__p)++) \
+		for_each_if((__mask) & BIT(__p))
+
+#define for_each_cpu_transcoder_masked(__dev_priv, __t, __mask) \
+	for ((__t) = 0; (__t) < I915_MAX_TRANSCODERS; (__t)++)	\
+		for_each_if ((__mask) & (1 << (__t)))
+
+#define for_each_universal_plane(__dev_priv, __pipe, __p)		\
+	for ((__p) = 0;							\
+	     (__p) < RUNTIME_INFO(__dev_priv)->num_sprites[(__pipe)] + 1;	\
+	     (__p)++)
+
+#define for_each_sprite(__dev_priv, __p, __s)				\
+	for ((__s) = 0;							\
+	     (__s) < RUNTIME_INFO(__dev_priv)->num_sprites[(__p)];	\
+	     (__s)++)
+
+#define for_each_port_masked(__port, __ports_mask) \
+	for ((__port) = PORT_A; (__port) < I915_MAX_PORTS; (__port)++)	\
+		for_each_if((__ports_mask) & BIT(__port))
+
+#define for_each_crtc(dev, crtc) \
+	list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head)
+
+#define for_each_intel_plane(dev, intel_plane) \
+	list_for_each_entry(intel_plane,			\
+			    &(dev)->mode_config.plane_list,	\
+			    base.head)
+
+#define for_each_intel_plane_mask(dev, intel_plane, plane_mask)		\
+	list_for_each_entry(intel_plane,				\
+			    &(dev)->mode_config.plane_list,		\
+			    base.head)					\
+		for_each_if((plane_mask) &				\
+			    drm_plane_mask(&intel_plane->base)))
+
+#define for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane)	\
+	list_for_each_entry(intel_plane,				\
+			    &(dev)->mode_config.plane_list,		\
+			    base.head)					\
+		for_each_if((intel_plane)->pipe == (intel_crtc)->pipe)
+
+#define for_each_intel_crtc(dev, intel_crtc)				\
+	list_for_each_entry(intel_crtc,					\
+			    &(dev)->mode_config.crtc_list,		\
+			    base.head)
+
+#define for_each_intel_crtc_mask(dev, intel_crtc, crtc_mask)		\
+	list_for_each_entry(intel_crtc,					\
+			    &(dev)->mode_config.crtc_list,		\
+			    base.head)					\
+		for_each_if((crtc_mask) & drm_crtc_mask(&intel_crtc->base))
+
+#define for_each_intel_encoder(dev, intel_encoder)		\
+	list_for_each_entry(intel_encoder,			\
+			    &(dev)->mode_config.encoder_list,	\
+			    base.head)
+
+#define for_each_intel_dp(dev, intel_encoder)			\
+	for_each_intel_encoder(dev, intel_encoder)		\
+		for_each_if(intel_encoder_is_dp(intel_encoder))
+
+#define for_each_intel_connector_iter(intel_connector, iter) \
+	while ((intel_connector = to_intel_connector(drm_connector_list_iter_next(iter))))
+
+#define for_each_encoder_on_crtc(dev, __crtc, intel_encoder) \
+	list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
+		for_each_if((intel_encoder)->base.crtc == (__crtc))
+
+#define for_each_connector_on_encoder(dev, __encoder, intel_connector) \
+	list_for_each_entry((intel_connector), &(dev)->mode_config.connector_list, base.head) \
+		for_each_if((intel_connector)->base.encoder == (__encoder))
+
+#define for_each_old_intel_plane_in_state(__state, plane, old_plane_state, __i) \
+	for ((__i) = 0; \
+	     (__i) < (__state)->base.dev->mode_config.num_total_plane && \
+		     ((plane) = to_intel_plane((__state)->base.planes[__i].ptr), \
+		      (old_plane_state) = to_intel_plane_state((__state)->base.planes[__i].old_state), 1); \
+	     (__i)++) \
+		for_each_if(plane)
+
+#define for_each_new_intel_plane_in_state(__state, plane, new_plane_state, __i) \
+	for ((__i) = 0; \
+	     (__i) < (__state)->base.dev->mode_config.num_total_plane && \
+		     ((plane) = to_intel_plane((__state)->base.planes[__i].ptr), \
+		      (new_plane_state) = to_intel_plane_state((__state)->base.planes[__i].new_state), 1); \
+	     (__i)++) \
+		for_each_if(plane)
+
+#define for_each_new_intel_crtc_in_state(__state, crtc, new_crtc_state, __i) \
+	for ((__i) = 0; \
+	     (__i) < (__state)->base.dev->mode_config.num_crtc && \
+		     ((crtc) = to_intel_crtc((__state)->base.crtcs[__i].ptr), \
+		      (new_crtc_state) = to_intel_crtc_state((__state)->base.crtcs[__i].new_state), 1); \
+	     (__i)++) \
+		for_each_if(crtc)
+
+#define for_each_oldnew_intel_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
+	for ((__i) = 0; \
+	     (__i) < (__state)->base.dev->mode_config.num_total_plane && \
+		     ((plane) = to_intel_plane((__state)->base.planes[__i].ptr), \
+		      (old_plane_state) = to_intel_plane_state((__state)->base.planes[__i].old_state), \
+		      (new_plane_state) = to_intel_plane_state((__state)->base.planes[__i].new_state), 1); \
+	     (__i)++) \
+		for_each_if(plane)
+
+#define for_each_oldnew_intel_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
+	for ((__i) = 0; \
+	     (__i) < (__state)->base.dev->mode_config.num_crtc && \
+		     ((crtc) = to_intel_crtc((__state)->base.crtcs[__i].ptr), \
+		      (old_crtc_state) = to_intel_crtc_state((__state)->base.crtcs[__i].old_state), \
+		      (new_crtc_state) = to_intel_crtc_state((__state)->base.crtcs[__i].new_state), 1); \
+	     (__i)++) \
+		for_each_if(crtc)
+
+void intel_link_compute_m_n(u16 bpp, int nlanes,
+			    int pixel_clock, int link_clock,
+			    struct intel_link_m_n *m_n,
+			    bool constant_n);
+bool is_ccs_modifier(u64 modifier);
+void lpt_disable_clkout_dp(struct drm_i915_private *dev_priv);
+u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
+			      u32 pixel_format, u64 modifier);
+bool intel_plane_can_remap(const struct intel_plane_state *plane_state);
+
+#endif
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
new file mode 100644
index 000000000000..c93ad512014c
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -0,0 +1,4618 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <linux/vgaarb.h>
+
+#include "display/intel_crt.h"
+#include "display/intel_dp.h"
+
+#include "i915_drv.h"
+#include "i915_irq.h"
+#include "intel_cdclk.h"
+#include "intel_combo_phy.h"
+#include "intel_csr.h"
+#include "intel_dpio_phy.h"
+#include "intel_drv.h"
+#include "intel_hotplug.h"
+#include "intel_sideband.h"
+
+bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
+					 enum i915_power_well_id power_well_id);
+
+const char *
+intel_display_power_domain_str(enum intel_display_power_domain domain)
+{
+	switch (domain) {
+	case POWER_DOMAIN_DISPLAY_CORE:
+		return "DISPLAY_CORE";
+	case POWER_DOMAIN_PIPE_A:
+		return "PIPE_A";
+	case POWER_DOMAIN_PIPE_B:
+		return "PIPE_B";
+	case POWER_DOMAIN_PIPE_C:
+		return "PIPE_C";
+	case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
+		return "PIPE_A_PANEL_FITTER";
+	case POWER_DOMAIN_PIPE_B_PANEL_FITTER:
+		return "PIPE_B_PANEL_FITTER";
+	case POWER_DOMAIN_PIPE_C_PANEL_FITTER:
+		return "PIPE_C_PANEL_FITTER";
+	case POWER_DOMAIN_TRANSCODER_A:
+		return "TRANSCODER_A";
+	case POWER_DOMAIN_TRANSCODER_B:
+		return "TRANSCODER_B";
+	case POWER_DOMAIN_TRANSCODER_C:
+		return "TRANSCODER_C";
+	case POWER_DOMAIN_TRANSCODER_EDP:
+		return "TRANSCODER_EDP";
+	case POWER_DOMAIN_TRANSCODER_EDP_VDSC:
+		return "TRANSCODER_EDP_VDSC";
+	case POWER_DOMAIN_TRANSCODER_DSI_A:
+		return "TRANSCODER_DSI_A";
+	case POWER_DOMAIN_TRANSCODER_DSI_C:
+		return "TRANSCODER_DSI_C";
+	case POWER_DOMAIN_PORT_DDI_A_LANES:
+		return "PORT_DDI_A_LANES";
+	case POWER_DOMAIN_PORT_DDI_B_LANES:
+		return "PORT_DDI_B_LANES";
+	case POWER_DOMAIN_PORT_DDI_C_LANES:
+		return "PORT_DDI_C_LANES";
+	case POWER_DOMAIN_PORT_DDI_D_LANES:
+		return "PORT_DDI_D_LANES";
+	case POWER_DOMAIN_PORT_DDI_E_LANES:
+		return "PORT_DDI_E_LANES";
+	case POWER_DOMAIN_PORT_DDI_F_LANES:
+		return "PORT_DDI_F_LANES";
+	case POWER_DOMAIN_PORT_DDI_A_IO:
+		return "PORT_DDI_A_IO";
+	case POWER_DOMAIN_PORT_DDI_B_IO:
+		return "PORT_DDI_B_IO";
+	case POWER_DOMAIN_PORT_DDI_C_IO:
+		return "PORT_DDI_C_IO";
+	case POWER_DOMAIN_PORT_DDI_D_IO:
+		return "PORT_DDI_D_IO";
+	case POWER_DOMAIN_PORT_DDI_E_IO:
+		return "PORT_DDI_E_IO";
+	case POWER_DOMAIN_PORT_DDI_F_IO:
+		return "PORT_DDI_F_IO";
+	case POWER_DOMAIN_PORT_DSI:
+		return "PORT_DSI";
+	case POWER_DOMAIN_PORT_CRT:
+		return "PORT_CRT";
+	case POWER_DOMAIN_PORT_OTHER:
+		return "PORT_OTHER";
+	case POWER_DOMAIN_VGA:
+		return "VGA";
+	case POWER_DOMAIN_AUDIO:
+		return "AUDIO";
+	case POWER_DOMAIN_AUX_A:
+		return "AUX_A";
+	case POWER_DOMAIN_AUX_B:
+		return "AUX_B";
+	case POWER_DOMAIN_AUX_C:
+		return "AUX_C";
+	case POWER_DOMAIN_AUX_D:
+		return "AUX_D";
+	case POWER_DOMAIN_AUX_E:
+		return "AUX_E";
+	case POWER_DOMAIN_AUX_F:
+		return "AUX_F";
+	case POWER_DOMAIN_AUX_IO_A:
+		return "AUX_IO_A";
+	case POWER_DOMAIN_AUX_TBT1:
+		return "AUX_TBT1";
+	case POWER_DOMAIN_AUX_TBT2:
+		return "AUX_TBT2";
+	case POWER_DOMAIN_AUX_TBT3:
+		return "AUX_TBT3";
+	case POWER_DOMAIN_AUX_TBT4:
+		return "AUX_TBT4";
+	case POWER_DOMAIN_GMBUS:
+		return "GMBUS";
+	case POWER_DOMAIN_INIT:
+		return "INIT";
+	case POWER_DOMAIN_MODESET:
+		return "MODESET";
+	case POWER_DOMAIN_GT_IRQ:
+		return "GT_IRQ";
+	default:
+		MISSING_CASE(domain);
+		return "?";
+	}
+}
+
+static void intel_power_well_enable(struct drm_i915_private *dev_priv,
+				    struct i915_power_well *power_well)
+{
+	DRM_DEBUG_KMS("enabling %s\n", power_well->desc->name);
+	power_well->desc->ops->enable(dev_priv, power_well);
+	power_well->hw_enabled = true;
+}
+
+static void intel_power_well_disable(struct drm_i915_private *dev_priv,
+				     struct i915_power_well *power_well)
+{
+	DRM_DEBUG_KMS("disabling %s\n", power_well->desc->name);
+	power_well->hw_enabled = false;
+	power_well->desc->ops->disable(dev_priv, power_well);
+}
+
+static void intel_power_well_get(struct drm_i915_private *dev_priv,
+				 struct i915_power_well *power_well)
+{
+	if (!power_well->count++)
+		intel_power_well_enable(dev_priv, power_well);
+}
+
+static void intel_power_well_put(struct drm_i915_private *dev_priv,
+				 struct i915_power_well *power_well)
+{
+	WARN(!power_well->count, "Use count on power well %s is already zero",
+	     power_well->desc->name);
+
+	if (!--power_well->count)
+		intel_power_well_disable(dev_priv, power_well);
+}
+
+/**
+ * __intel_display_power_is_enabled - unlocked check for a power domain
+ * @dev_priv: i915 device instance
+ * @domain: power domain to check
+ *
+ * This is the unlocked version of intel_display_power_is_enabled() and should
+ * only be used from error capture and recovery code where deadlocks are
+ * possible.
+ *
+ * Returns:
+ * True when the power domain is enabled, false otherwise.
+ */
+bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
+				      enum intel_display_power_domain domain)
+{
+	struct i915_power_well *power_well;
+	bool is_enabled;
+
+	if (dev_priv->runtime_pm.suspended)
+		return false;
+
+	is_enabled = true;
+
+	for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain)) {
+		if (power_well->desc->always_on)
+			continue;
+
+		if (!power_well->hw_enabled) {
+			is_enabled = false;
+			break;
+		}
+	}
+
+	return is_enabled;
+}
+
+/**
+ * intel_display_power_is_enabled - check for a power domain
+ * @dev_priv: i915 device instance
+ * @domain: power domain to check
+ *
+ * This function can be used to check the hw power domain state. It is mostly
+ * used in hardware state readout functions. Everywhere else code should rely
+ * upon explicit power domain reference counting to ensure that the hardware
+ * block is powered up before accessing it.
+ *
+ * Callers must hold the relevant modesetting locks to ensure that concurrent
+ * threads can't disable the power well while the caller tries to read a few
+ * registers.
+ *
+ * Returns:
+ * True when the power domain is enabled, false otherwise.
+ */
+bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
+				    enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains;
+	bool ret;
+
+	power_domains = &dev_priv->power_domains;
+
+	mutex_lock(&power_domains->lock);
+	ret = __intel_display_power_is_enabled(dev_priv, domain);
+	mutex_unlock(&power_domains->lock);
+
+	return ret;
+}
+
+/*
+ * Starting with Haswell, we have a "Power Down Well" that can be turned off
+ * when not needed anymore. We have 4 registers that can request the power well
+ * to be enabled, and it will only be disabled if none of the registers is
+ * requesting it to be enabled.
+ */
+static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv,
+				       u8 irq_pipe_mask, bool has_vga)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+
+	/*
+	 * After we re-enable the power well, if we touch VGA register 0x3d5
+	 * we'll get unclaimed register interrupts. This stops after we write
+	 * anything to the VGA MSR register. The vgacon module uses this
+	 * register all the time, so if we unbind our driver and, as a
+	 * consequence, bind vgacon, we'll get stuck in an infinite loop at
+	 * console_unlock(). So make here we touch the VGA MSR register, making
+	 * sure vgacon can keep working normally without triggering interrupts
+	 * and error messages.
+	 */
+	if (has_vga) {
+		vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
+		outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
+		vga_put(pdev, VGA_RSRC_LEGACY_IO);
+	}
+
+	if (irq_pipe_mask)
+		gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask);
+}
+
+static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv,
+				       u8 irq_pipe_mask)
+{
+	if (irq_pipe_mask)
+		gen8_irq_power_well_pre_disable(dev_priv, irq_pipe_mask);
+}
+
+static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+
+	/* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
+	WARN_ON(intel_wait_for_register(&dev_priv->uncore,
+					regs->driver,
+					HSW_PWR_WELL_CTL_STATE(pw_idx),
+					HSW_PWR_WELL_CTL_STATE(pw_idx),
+					1));
+}
+
+static u32 hsw_power_well_requesters(struct drm_i915_private *dev_priv,
+				     const struct i915_power_well_regs *regs,
+				     int pw_idx)
+{
+	u32 req_mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
+	u32 ret;
+
+	ret = I915_READ(regs->bios) & req_mask ? 1 : 0;
+	ret |= I915_READ(regs->driver) & req_mask ? 2 : 0;
+	if (regs->kvmr.reg)
+		ret |= I915_READ(regs->kvmr) & req_mask ? 4 : 0;
+	ret |= I915_READ(regs->debug) & req_mask ? 8 : 0;
+
+	return ret;
+}
+
+static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
+					    struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+	bool disabled;
+	u32 reqs;
+
+	/*
+	 * Bspec doesn't require waiting for PWs to get disabled, but still do
+	 * this for paranoia. The known cases where a PW will be forced on:
+	 * - a KVMR request on any power well via the KVMR request register
+	 * - a DMC request on PW1 and MISC_IO power wells via the BIOS and
+	 *   DEBUG request registers
+	 * Skip the wait in case any of the request bits are set and print a
+	 * diagnostic message.
+	 */
+	wait_for((disabled = !(I915_READ(regs->driver) &
+			       HSW_PWR_WELL_CTL_STATE(pw_idx))) ||
+		 (reqs = hsw_power_well_requesters(dev_priv, regs, pw_idx)), 1);
+	if (disabled)
+		return;
+
+	DRM_DEBUG_KMS("%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n",
+		      power_well->desc->name,
+		      !!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
+}
+
+static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
+					   enum skl_power_gate pg)
+{
+	/* Timeout 5us for PG#0, for other PGs 1us */
+	WARN_ON(intel_wait_for_register(&dev_priv->uncore, SKL_FUSE_STATUS,
+					SKL_FUSE_PG_DIST_STATUS(pg),
+					SKL_FUSE_PG_DIST_STATUS(pg), 1));
+}
+
+static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
+				  struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+	bool wait_fuses = power_well->desc->hsw.has_fuses;
+	enum skl_power_gate uninitialized_var(pg);
+	u32 val;
+
+	if (wait_fuses) {
+		pg = INTEL_GEN(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) :
+						 SKL_PW_CTL_IDX_TO_PG(pw_idx);
+		/*
+		 * For PW1 we have to wait both for the PW0/PG0 fuse state
+		 * before enabling the power well and PW1/PG1's own fuse
+		 * state after the enabling. For all other power wells with
+		 * fuses we only have to wait for that PW/PG's fuse state
+		 * after the enabling.
+		 */
+		if (pg == SKL_PG1)
+			gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
+	}
+
+	val = I915_READ(regs->driver);
+	I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
+	hsw_wait_for_power_well_enable(dev_priv, power_well);
+
+	/* Display WA #1178: cnl */
+	if (IS_CANNONLAKE(dev_priv) &&
+	    pw_idx >= GLK_PW_CTL_IDX_AUX_B &&
+	    pw_idx <= CNL_PW_CTL_IDX_AUX_F) {
+		val = I915_READ(CNL_AUX_ANAOVRD1(pw_idx));
+		val |= CNL_AUX_ANAOVRD1_ENABLE | CNL_AUX_ANAOVRD1_LDO_BYPASS;
+		I915_WRITE(CNL_AUX_ANAOVRD1(pw_idx), val);
+	}
+
+	if (wait_fuses)
+		gen9_wait_for_power_well_fuses(dev_priv, pg);
+
+	hsw_power_well_post_enable(dev_priv,
+				   power_well->desc->hsw.irq_pipe_mask,
+				   power_well->desc->hsw.has_vga);
+}
+
+static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
+				   struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+	u32 val;
+
+	hsw_power_well_pre_disable(dev_priv,
+				   power_well->desc->hsw.irq_pipe_mask);
+
+	val = I915_READ(regs->driver);
+	I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
+	hsw_wait_for_power_well_disable(dev_priv, power_well);
+}
+
+#define ICL_AUX_PW_TO_PORT(pw_idx)	((pw_idx) - ICL_PW_CTL_IDX_AUX_A)
+
+static void
+icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
+				    struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+	enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
+	u32 val;
+
+	val = I915_READ(regs->driver);
+	I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
+
+	val = I915_READ(ICL_PORT_CL_DW12(port));
+	I915_WRITE(ICL_PORT_CL_DW12(port), val | ICL_LANE_ENABLE_AUX);
+
+	hsw_wait_for_power_well_enable(dev_priv, power_well);
+
+	/* Display WA #1178: icl */
+	if (IS_ICELAKE(dev_priv) &&
+	    pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B &&
+	    !intel_bios_is_port_edp(dev_priv, port)) {
+		val = I915_READ(ICL_AUX_ANAOVRD1(pw_idx));
+		val |= ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS;
+		I915_WRITE(ICL_AUX_ANAOVRD1(pw_idx), val);
+	}
+}
+
+static void
+icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
+				     struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+	enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
+	u32 val;
+
+	val = I915_READ(ICL_PORT_CL_DW12(port));
+	I915_WRITE(ICL_PORT_CL_DW12(port), val & ~ICL_LANE_ENABLE_AUX);
+
+	val = I915_READ(regs->driver);
+	I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
+
+	hsw_wait_for_power_well_disable(dev_priv, power_well);
+}
+
+#define ICL_AUX_PW_TO_CH(pw_idx)	\
+	((pw_idx) - ICL_PW_CTL_IDX_AUX_A + AUX_CH_A)
+
+static void
+icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
+				 struct i915_power_well *power_well)
+{
+	enum aux_ch aux_ch = ICL_AUX_PW_TO_CH(power_well->desc->hsw.idx);
+	u32 val;
+
+	val = I915_READ(DP_AUX_CH_CTL(aux_ch));
+	val &= ~DP_AUX_CH_CTL_TBT_IO;
+	if (power_well->desc->hsw.is_tc_tbt)
+		val |= DP_AUX_CH_CTL_TBT_IO;
+	I915_WRITE(DP_AUX_CH_CTL(aux_ch), val);
+
+	hsw_power_well_enable(dev_priv, power_well);
+}
+
+/*
+ * We should only use the power well if we explicitly asked the hardware to
+ * enable it, so check if it's enabled and also check if we've requested it to
+ * be enabled.
+ */
+static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
+				   struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	enum i915_power_well_id id = power_well->desc->id;
+	int pw_idx = power_well->desc->hsw.idx;
+	u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx) |
+		   HSW_PWR_WELL_CTL_STATE(pw_idx);
+	u32 val;
+
+	val = I915_READ(regs->driver);
+
+	/*
+	 * On GEN9 big core due to a DMC bug the driver's request bits for PW1
+	 * and the MISC_IO PW will be not restored, so check instead for the
+	 * BIOS's own request bits, which are forced-on for these power wells
+	 * when exiting DC5/6.
+	 */
+	if (IS_GEN(dev_priv, 9) && !IS_GEN9_LP(dev_priv) &&
+	    (id == SKL_DISP_PW_1 || id == SKL_DISP_PW_MISC_IO))
+		val |= I915_READ(regs->bios);
+
+	return (val & mask) == mask;
+}
+
+static void assert_can_enable_dc9(struct drm_i915_private *dev_priv)
+{
+	WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
+		  "DC9 already programmed to be enabled.\n");
+	WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
+		  "DC5 still not disabled to enable DC9.\n");
+	WARN_ONCE(I915_READ(HSW_PWR_WELL_CTL2) &
+		  HSW_PWR_WELL_CTL_REQ(SKL_PW_CTL_IDX_PW_2),
+		  "Power well 2 on.\n");
+	WARN_ONCE(intel_irqs_enabled(dev_priv),
+		  "Interrupts not disabled yet.\n");
+
+	 /*
+	  * TODO: check for the following to verify the conditions to enter DC9
+	  * state are satisfied:
+	  * 1] Check relevant display engine registers to verify if mode set
+	  * disable sequence was followed.
+	  * 2] Check if display uninitialize sequence is initialized.
+	  */
+}
+
+static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
+{
+	WARN_ONCE(intel_irqs_enabled(dev_priv),
+		  "Interrupts not disabled yet.\n");
+	WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
+		  "DC5 still not disabled.\n");
+
+	 /*
+	  * TODO: check for the following to verify DC9 state was indeed
+	  * entered before programming to disable it:
+	  * 1] Check relevant display engine registers to verify if mode
+	  *  set disable sequence was followed.
+	  * 2] Check if display uninitialize sequence is initialized.
+	  */
+}
+
+static void gen9_write_dc_state(struct drm_i915_private *dev_priv,
+				u32 state)
+{
+	int rewrites = 0;
+	int rereads = 0;
+	u32 v;
+
+	I915_WRITE(DC_STATE_EN, state);
+
+	/* It has been observed that disabling the dc6 state sometimes
+	 * doesn't stick and dmc keeps returning old value. Make sure
+	 * the write really sticks enough times and also force rewrite until
+	 * we are confident that state is exactly what we want.
+	 */
+	do  {
+		v = I915_READ(DC_STATE_EN);
+
+		if (v != state) {
+			I915_WRITE(DC_STATE_EN, state);
+			rewrites++;
+			rereads = 0;
+		} else if (rereads++ > 5) {
+			break;
+		}
+
+	} while (rewrites < 100);
+
+	if (v != state)
+		DRM_ERROR("Writing dc state to 0x%x failed, now 0x%x\n",
+			  state, v);
+
+	/* Most of the times we need one retry, avoid spam */
+	if (rewrites > 1)
+		DRM_DEBUG_KMS("Rewrote dc state to 0x%x %d times\n",
+			      state, rewrites);
+}
+
+static u32 gen9_dc_mask(struct drm_i915_private *dev_priv)
+{
+	u32 mask;
+
+	mask = DC_STATE_EN_UPTO_DC5;
+	if (INTEL_GEN(dev_priv) >= 11)
+		mask |= DC_STATE_EN_UPTO_DC6 | DC_STATE_EN_DC9;
+	else if (IS_GEN9_LP(dev_priv))
+		mask |= DC_STATE_EN_DC9;
+	else
+		mask |= DC_STATE_EN_UPTO_DC6;
+
+	return mask;
+}
+
+void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = I915_READ(DC_STATE_EN) & gen9_dc_mask(dev_priv);
+
+	DRM_DEBUG_KMS("Resetting DC state tracking from %02x to %02x\n",
+		      dev_priv->csr.dc_state, val);
+	dev_priv->csr.dc_state = val;
+}
+
+/**
+ * gen9_set_dc_state - set target display C power state
+ * @dev_priv: i915 device instance
+ * @state: target DC power state
+ * - DC_STATE_DISABLE
+ * - DC_STATE_EN_UPTO_DC5
+ * - DC_STATE_EN_UPTO_DC6
+ * - DC_STATE_EN_DC9
+ *
+ * Signal to DMC firmware/HW the target DC power state passed in @state.
+ * DMC/HW can turn off individual display clocks and power rails when entering
+ * a deeper DC power state (higher in number) and turns these back when exiting
+ * that state to a shallower power state (lower in number). The HW will decide
+ * when to actually enter a given state on an on-demand basis, for instance
+ * depending on the active state of display pipes. The state of display
+ * registers backed by affected power rails are saved/restored as needed.
+ *
+ * Based on the above enabling a deeper DC power state is asynchronous wrt.
+ * enabling it. Disabling a deeper power state is synchronous: for instance
+ * setting %DC_STATE_DISABLE won't complete until all HW resources are turned
+ * back on and register state is restored. This is guaranteed by the MMIO write
+ * to DC_STATE_EN blocking until the state is restored.
+ */
+static void gen9_set_dc_state(struct drm_i915_private *dev_priv, u32 state)
+{
+	u32 val;
+	u32 mask;
+
+	if (WARN_ON_ONCE(state & ~dev_priv->csr.allowed_dc_mask))
+		state &= dev_priv->csr.allowed_dc_mask;
+
+	val = I915_READ(DC_STATE_EN);
+	mask = gen9_dc_mask(dev_priv);
+	DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n",
+		      val & mask, state);
+
+	/* Check if DMC is ignoring our DC state requests */
+	if ((val & mask) != dev_priv->csr.dc_state)
+		DRM_ERROR("DC state mismatch (0x%x -> 0x%x)\n",
+			  dev_priv->csr.dc_state, val & mask);
+
+	val &= ~mask;
+	val |= state;
+
+	gen9_write_dc_state(dev_priv, val);
+
+	dev_priv->csr.dc_state = val & mask;
+}
+
+void bxt_enable_dc9(struct drm_i915_private *dev_priv)
+{
+	assert_can_enable_dc9(dev_priv);
+
+	DRM_DEBUG_KMS("Enabling DC9\n");
+	/*
+	 * Power sequencer reset is not needed on
+	 * platforms with South Display Engine on PCH,
+	 * because PPS registers are always on.
+	 */
+	if (!HAS_PCH_SPLIT(dev_priv))
+		intel_power_sequencer_reset(dev_priv);
+	gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9);
+}
+
+void bxt_disable_dc9(struct drm_i915_private *dev_priv)
+{
+	assert_can_disable_dc9(dev_priv);
+
+	DRM_DEBUG_KMS("Disabling DC9\n");
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	intel_pps_unlock_regs_wa(dev_priv);
+}
+
+static void assert_csr_loaded(struct drm_i915_private *dev_priv)
+{
+	WARN_ONCE(!I915_READ(CSR_PROGRAM(0)),
+		  "CSR program storage start is NULL\n");
+	WARN_ONCE(!I915_READ(CSR_SSP_BASE), "CSR SSP Base Not fine\n");
+	WARN_ONCE(!I915_READ(CSR_HTP_SKL), "CSR HTP Not fine\n");
+}
+
+static struct i915_power_well *
+lookup_power_well(struct drm_i915_private *dev_priv,
+		  enum i915_power_well_id power_well_id)
+{
+	struct i915_power_well *power_well;
+
+	for_each_power_well(dev_priv, power_well)
+		if (power_well->desc->id == power_well_id)
+			return power_well;
+
+	/*
+	 * It's not feasible to add error checking code to the callers since
+	 * this condition really shouldn't happen and it doesn't even make sense
+	 * to abort things like display initialization sequences. Just return
+	 * the first power well and hope the WARN gets reported so we can fix
+	 * our driver.
+	 */
+	WARN(1, "Power well %d not defined for this platform\n", power_well_id);
+	return &dev_priv->power_domains.power_wells[0];
+}
+
+static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
+{
+	bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
+					SKL_DISP_PW_2);
+
+	WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n");
+
+	WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5),
+		  "DC5 already programmed to be enabled.\n");
+	assert_rpm_wakelock_held(&dev_priv->runtime_pm);
+
+	assert_csr_loaded(dev_priv);
+}
+
+void gen9_enable_dc5(struct drm_i915_private *dev_priv)
+{
+	assert_can_enable_dc5(dev_priv);
+
+	DRM_DEBUG_KMS("Enabling DC5\n");
+
+	/* Wa Display #1183: skl,kbl,cfl */
+	if (IS_GEN9_BC(dev_priv))
+		I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
+			   SKL_SELECT_ALTERNATE_DC_EXIT);
+
+	gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5);
+}
+
+static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
+{
+	WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
+		  "Backlight is not disabled.\n");
+	WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
+		  "DC6 already programmed to be enabled.\n");
+
+	assert_csr_loaded(dev_priv);
+}
+
+void skl_enable_dc6(struct drm_i915_private *dev_priv)
+{
+	assert_can_enable_dc6(dev_priv);
+
+	DRM_DEBUG_KMS("Enabling DC6\n");
+
+	/* Wa Display #1183: skl,kbl,cfl */
+	if (IS_GEN9_BC(dev_priv))
+		I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
+			   SKL_SELECT_ALTERNATE_DC_EXIT);
+
+	gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
+}
+
+static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
+				   struct i915_power_well *power_well)
+{
+	const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+	int pw_idx = power_well->desc->hsw.idx;
+	u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
+	u32 bios_req = I915_READ(regs->bios);
+
+	/* Take over the request bit if set by BIOS. */
+	if (bios_req & mask) {
+		u32 drv_req = I915_READ(regs->driver);
+
+		if (!(drv_req & mask))
+			I915_WRITE(regs->driver, drv_req | mask);
+		I915_WRITE(regs->bios, bios_req & ~mask);
+	}
+}
+
+static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	bxt_ddi_phy_init(dev_priv, power_well->desc->bxt.phy);
+}
+
+static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
+					    struct i915_power_well *power_well)
+{
+	bxt_ddi_phy_uninit(dev_priv, power_well->desc->bxt.phy);
+}
+
+static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv,
+					    struct i915_power_well *power_well)
+{
+	return bxt_ddi_phy_is_enabled(dev_priv, power_well->desc->bxt.phy);
+}
+
+static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_well *power_well;
+
+	power_well = lookup_power_well(dev_priv, BXT_DISP_PW_DPIO_CMN_A);
+	if (power_well->count > 0)
+		bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
+
+	power_well = lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+	if (power_well->count > 0)
+		bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
+
+	if (IS_GEMINILAKE(dev_priv)) {
+		power_well = lookup_power_well(dev_priv,
+					       GLK_DISP_PW_DPIO_CMN_C);
+		if (power_well->count > 0)
+			bxt_ddi_phy_verify_state(dev_priv,
+						 power_well->desc->bxt.phy);
+	}
+}
+
+static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	return (I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0;
+}
+
+static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv)
+{
+	u32 tmp = I915_READ(DBUF_CTL);
+
+	WARN((tmp & (DBUF_POWER_STATE | DBUF_POWER_REQUEST)) !=
+	     (DBUF_POWER_STATE | DBUF_POWER_REQUEST),
+	     "Unexpected DBuf power power state (0x%08x)\n", tmp);
+}
+
+static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
+					  struct i915_power_well *power_well)
+{
+	struct intel_cdclk_state cdclk_state = {};
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	dev_priv->display.get_cdclk(dev_priv, &cdclk_state);
+	/* Can't read out voltage_level so can't use intel_cdclk_changed() */
+	WARN_ON(intel_cdclk_needs_modeset(&dev_priv->cdclk.hw, &cdclk_state));
+
+	gen9_assert_dbuf_enabled(dev_priv);
+
+	if (IS_GEN9_LP(dev_priv))
+		bxt_verify_ddi_phy_power_wells(dev_priv);
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		/*
+		 * DMC retains HW context only for port A, the other combo
+		 * PHY's HW context for port B is lost after DC transitions,
+		 * so we need to restore it manually.
+		 */
+		intel_combo_phy_init(dev_priv);
+}
+
+static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	if (!dev_priv->csr.dmc_payload)
+		return;
+
+	if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
+		skl_enable_dc6(dev_priv);
+	else if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5)
+		gen9_enable_dc5(dev_priv);
+}
+
+static void i9xx_power_well_sync_hw_noop(struct drm_i915_private *dev_priv,
+					 struct i915_power_well *power_well)
+{
+}
+
+static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+}
+
+static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
+					     struct i915_power_well *power_well)
+{
+	return true;
+}
+
+static void i830_pipes_power_well_enable(struct drm_i915_private *dev_priv,
+					 struct i915_power_well *power_well)
+{
+	if ((I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE) == 0)
+		i830_enable_pipe(dev_priv, PIPE_A);
+	if ((I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE) == 0)
+		i830_enable_pipe(dev_priv, PIPE_B);
+}
+
+static void i830_pipes_power_well_disable(struct drm_i915_private *dev_priv,
+					  struct i915_power_well *power_well)
+{
+	i830_disable_pipe(dev_priv, PIPE_B);
+	i830_disable_pipe(dev_priv, PIPE_A);
+}
+
+static bool i830_pipes_power_well_enabled(struct drm_i915_private *dev_priv,
+					  struct i915_power_well *power_well)
+{
+	return I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE &&
+		I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
+}
+
+static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv,
+					  struct i915_power_well *power_well)
+{
+	if (power_well->count > 0)
+		i830_pipes_power_well_enable(dev_priv, power_well);
+	else
+		i830_pipes_power_well_disable(dev_priv, power_well);
+}
+
+static void vlv_set_power_well(struct drm_i915_private *dev_priv,
+			       struct i915_power_well *power_well, bool enable)
+{
+	int pw_idx = power_well->desc->vlv.idx;
+	u32 mask;
+	u32 state;
+	u32 ctrl;
+
+	mask = PUNIT_PWRGT_MASK(pw_idx);
+	state = enable ? PUNIT_PWRGT_PWR_ON(pw_idx) :
+			 PUNIT_PWRGT_PWR_GATE(pw_idx);
+
+	vlv_punit_get(dev_priv);
+
+#define COND \
+	((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
+
+	if (COND)
+		goto out;
+
+	ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL);
+	ctrl &= ~mask;
+	ctrl |= state;
+	vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl);
+
+	if (wait_for(COND, 100))
+		DRM_ERROR("timeout setting power well state %08x (%08x)\n",
+			  state,
+			  vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL));
+
+#undef COND
+
+out:
+	vlv_punit_put(dev_priv);
+}
+
+static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
+				  struct i915_power_well *power_well)
+{
+	vlv_set_power_well(dev_priv, power_well, true);
+}
+
+static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
+				   struct i915_power_well *power_well)
+{
+	vlv_set_power_well(dev_priv, power_well, false);
+}
+
+static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
+				   struct i915_power_well *power_well)
+{
+	int pw_idx = power_well->desc->vlv.idx;
+	bool enabled = false;
+	u32 mask;
+	u32 state;
+	u32 ctrl;
+
+	mask = PUNIT_PWRGT_MASK(pw_idx);
+	ctrl = PUNIT_PWRGT_PWR_ON(pw_idx);
+
+	vlv_punit_get(dev_priv);
+
+	state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
+	/*
+	 * We only ever set the power-on and power-gate states, anything
+	 * else is unexpected.
+	 */
+	WARN_ON(state != PUNIT_PWRGT_PWR_ON(pw_idx) &&
+		state != PUNIT_PWRGT_PWR_GATE(pw_idx));
+	if (state == ctrl)
+		enabled = true;
+
+	/*
+	 * A transient state at this point would mean some unexpected party
+	 * is poking at the power controls too.
+	 */
+	ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
+	WARN_ON(ctrl != state);
+
+	vlv_punit_put(dev_priv);
+
+	return enabled;
+}
+
+static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	/*
+	 * On driver load, a pipe may be active and driving a DSI display.
+	 * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
+	 * (and never recovering) in this case. intel_dsi_post_disable() will
+	 * clear it when we turn off the display.
+	 */
+	val = I915_READ(DSPCLK_GATE_D);
+	val &= DPOUNIT_CLOCK_GATE_DISABLE;
+	val |= VRHUNIT_CLOCK_GATE_DISABLE;
+	I915_WRITE(DSPCLK_GATE_D, val);
+
+	/*
+	 * Disable trickle feed and enable pnd deadline calculation
+	 */
+	I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
+	I915_WRITE(CBR1_VLV, 0);
+
+	WARN_ON(dev_priv->rawclk_freq == 0);
+
+	I915_WRITE(RAWCLK_FREQ_VLV,
+		   DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 1000));
+}
+
+static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
+{
+	struct intel_encoder *encoder;
+	enum pipe pipe;
+
+	/*
+	 * Enable the CRI clock source so we can get at the
+	 * display and the reference clock for VGA
+	 * hotplug / manual detection. Supposedly DSI also
+	 * needs the ref clock up and running.
+	 *
+	 * CHV DPLL B/C have some issues if VGA mode is enabled.
+	 */
+	for_each_pipe(dev_priv, pipe) {
+		u32 val = I915_READ(DPLL(pipe));
+
+		val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+		if (pipe != PIPE_A)
+			val |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+		I915_WRITE(DPLL(pipe), val);
+	}
+
+	vlv_init_display_clock_gating(dev_priv);
+
+	spin_lock_irq(&dev_priv->irq_lock);
+	valleyview_enable_display_irqs(dev_priv);
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	/*
+	 * During driver initialization/resume we can avoid restoring the
+	 * part of the HW/SW state that will be inited anyway explicitly.
+	 */
+	if (dev_priv->power_domains.initializing)
+		return;
+
+	intel_hpd_init(dev_priv);
+
+	/* Re-enable the ADPA, if we have one */
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		if (encoder->type == INTEL_OUTPUT_ANALOG)
+			intel_crt_reset(&encoder->base);
+	}
+
+	i915_redisable_vga_power_on(dev_priv);
+
+	intel_pps_unlock_regs_wa(dev_priv);
+}
+
+static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv)
+{
+	spin_lock_irq(&dev_priv->irq_lock);
+	valleyview_disable_display_irqs(dev_priv);
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	/* make sure we're done processing display irqs */
+	synchronize_irq(dev_priv->drm.irq);
+
+	intel_power_sequencer_reset(dev_priv);
+
+	/* Prevent us from re-enabling polling on accident in late suspend */
+	if (!dev_priv->drm.dev->power.is_suspended)
+		intel_hpd_poll_init(dev_priv);
+}
+
+static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv,
+					  struct i915_power_well *power_well)
+{
+	vlv_set_power_well(dev_priv, power_well, true);
+
+	vlv_display_power_well_init(dev_priv);
+}
+
+static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	vlv_display_power_well_deinit(dev_priv);
+
+	vlv_set_power_well(dev_priv, power_well, false);
+}
+
+static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	/* since ref/cri clock was enabled */
+	udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
+
+	vlv_set_power_well(dev_priv, power_well, true);
+
+	/*
+	 * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
+	 *  6.	De-assert cmn_reset/side_reset. Same as VLV X0.
+	 *   a.	GUnit 0x2110 bit[0] set to 1 (def 0)
+	 *   b.	The other bits such as sfr settings / modesel may all
+	 *	be set to 0.
+	 *
+	 * This should only be done on init and resume from S3 with
+	 * both PLLs disabled, or we risk losing DPIO and PLL
+	 * synchronization.
+	 */
+	I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST);
+}
+
+static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
+					    struct i915_power_well *power_well)
+{
+	enum pipe pipe;
+
+	for_each_pipe(dev_priv, pipe)
+		assert_pll_disabled(dev_priv, pipe);
+
+	/* Assert common reset */
+	I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST);
+
+	vlv_set_power_well(dev_priv, power_well, false);
+}
+
+#define POWER_DOMAIN_MASK (GENMASK_ULL(POWER_DOMAIN_NUM - 1, 0))
+
+#define BITS_SET(val, bits) (((val) & (bits)) == (bits))
+
+static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_well *cmn_bc =
+		lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+	struct i915_power_well *cmn_d =
+		lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
+	u32 phy_control = dev_priv->chv_phy_control;
+	u32 phy_status = 0;
+	u32 phy_status_mask = 0xffffffff;
+
+	/*
+	 * The BIOS can leave the PHY is some weird state
+	 * where it doesn't fully power down some parts.
+	 * Disable the asserts until the PHY has been fully
+	 * reset (ie. the power well has been disabled at
+	 * least once).
+	 */
+	if (!dev_priv->chv_phy_assert[DPIO_PHY0])
+		phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) |
+				     PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) |
+				     PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) |
+				     PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) |
+				     PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) |
+				     PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1));
+
+	if (!dev_priv->chv_phy_assert[DPIO_PHY1])
+		phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) |
+				     PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) |
+				     PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1));
+
+	if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
+		phy_status |= PHY_POWERGOOD(DPIO_PHY0);
+
+		/* this assumes override is only used to enable lanes */
+		if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0)
+			phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0);
+
+		if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0)
+			phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1);
+
+		/* CL1 is on whenever anything is on in either channel */
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) |
+			     PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)))
+			phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0);
+
+		/*
+		 * The DPLLB check accounts for the pipe B + port A usage
+		 * with CL2 powered up but all the lanes in the second channel
+		 * powered down.
+		 */
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) &&
+		    (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0)
+			phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1);
+
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0)))
+			phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0);
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0)))
+			phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1);
+
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1)))
+			phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0);
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1)))
+			phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
+	}
+
+	if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
+		phy_status |= PHY_POWERGOOD(DPIO_PHY1);
+
+		/* this assumes override is only used to enable lanes */
+		if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0)
+			phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0);
+
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0)))
+			phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0);
+
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0)))
+			phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0);
+		if (BITS_SET(phy_control,
+			     PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0)))
+			phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1);
+	}
+
+	phy_status &= phy_status_mask;
+
+	/*
+	 * The PHY may be busy with some initial calibration and whatnot,
+	 * so the power state can take a while to actually change.
+	 */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    DISPLAY_PHY_STATUS,
+				    phy_status_mask,
+				    phy_status,
+				    10))
+		DRM_ERROR("Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n",
+			  I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask,
+			   phy_status, dev_priv->chv_phy_control);
+}
+
+#undef BITS_SET
+
+static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
+					   struct i915_power_well *power_well)
+{
+	enum dpio_phy phy;
+	enum pipe pipe;
+	u32 tmp;
+
+	WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
+		     power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
+
+	if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
+		pipe = PIPE_A;
+		phy = DPIO_PHY0;
+	} else {
+		pipe = PIPE_C;
+		phy = DPIO_PHY1;
+	}
+
+	/* since ref/cri clock was enabled */
+	udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
+	vlv_set_power_well(dev_priv, power_well, true);
+
+	/* Poll for phypwrgood signal */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    DISPLAY_PHY_STATUS,
+				    PHY_POWERGOOD(phy),
+				    PHY_POWERGOOD(phy),
+				    1))
+		DRM_ERROR("Display PHY %d is not power up\n", phy);
+
+	vlv_dpio_get(dev_priv);
+
+	/* Enable dynamic power down */
+	tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28);
+	tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN |
+		DPIO_SUS_CLK_CONFIG_GATE_CLKREQ;
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp);
+
+	if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
+		tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1);
+		tmp |= DPIO_DYNPWRDOWNEN_CH1;
+		vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp);
+	} else {
+		/*
+		 * Force the non-existing CL2 off. BXT does this
+		 * too, so maybe it saves some power even though
+		 * CL2 doesn't exist?
+		 */
+		tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
+		tmp |= DPIO_CL2_LDOFUSE_PWRENB;
+		vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp);
+	}
+
+	vlv_dpio_put(dev_priv);
+
+	dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy);
+	I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+	DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
+		      phy, dev_priv->chv_phy_control);
+
+	assert_chv_phy_status(dev_priv);
+}
+
+static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
+					    struct i915_power_well *power_well)
+{
+	enum dpio_phy phy;
+
+	WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
+		     power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
+
+	if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
+		phy = DPIO_PHY0;
+		assert_pll_disabled(dev_priv, PIPE_A);
+		assert_pll_disabled(dev_priv, PIPE_B);
+	} else {
+		phy = DPIO_PHY1;
+		assert_pll_disabled(dev_priv, PIPE_C);
+	}
+
+	dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy);
+	I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+	vlv_set_power_well(dev_priv, power_well, false);
+
+	DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
+		      phy, dev_priv->chv_phy_control);
+
+	/* PHY is fully reset now, so we can enable the PHY state asserts */
+	dev_priv->chv_phy_assert[phy] = true;
+
+	assert_chv_phy_status(dev_priv);
+}
+
+static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy,
+				     enum dpio_channel ch, bool override, unsigned int mask)
+{
+	enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C;
+	u32 reg, val, expected, actual;
+
+	/*
+	 * The BIOS can leave the PHY is some weird state
+	 * where it doesn't fully power down some parts.
+	 * Disable the asserts until the PHY has been fully
+	 * reset (ie. the power well has been disabled at
+	 * least once).
+	 */
+	if (!dev_priv->chv_phy_assert[phy])
+		return;
+
+	if (ch == DPIO_CH0)
+		reg = _CHV_CMN_DW0_CH0;
+	else
+		reg = _CHV_CMN_DW6_CH1;
+
+	vlv_dpio_get(dev_priv);
+	val = vlv_dpio_read(dev_priv, pipe, reg);
+	vlv_dpio_put(dev_priv);
+
+	/*
+	 * This assumes !override is only used when the port is disabled.
+	 * All lanes should power down even without the override when
+	 * the port is disabled.
+	 */
+	if (!override || mask == 0xf) {
+		expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
+		/*
+		 * If CH1 common lane is not active anymore
+		 * (eg. for pipe B DPLL) the entire channel will
+		 * shut down, which causes the common lane registers
+		 * to read as 0. That means we can't actually check
+		 * the lane power down status bits, but as the entire
+		 * register reads as 0 it's a good indication that the
+		 * channel is indeed entirely powered down.
+		 */
+		if (ch == DPIO_CH1 && val == 0)
+			expected = 0;
+	} else if (mask != 0x0) {
+		expected = DPIO_ANYDL_POWERDOWN;
+	} else {
+		expected = 0;
+	}
+
+	if (ch == DPIO_CH0)
+		actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0;
+	else
+		actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1;
+	actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
+
+	WARN(actual != expected,
+	     "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n",
+	     !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN),
+	     !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN),
+	     reg, val);
+}
+
+bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
+			  enum dpio_channel ch, bool override)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	bool was_override;
+
+	mutex_lock(&power_domains->lock);
+
+	was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+
+	if (override == was_override)
+		goto out;
+
+	if (override)
+		dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+	else
+		dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+
+	I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+	DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n",
+		      phy, ch, dev_priv->chv_phy_control);
+
+	assert_chv_phy_status(dev_priv);
+
+out:
+	mutex_unlock(&power_domains->lock);
+
+	return was_override;
+}
+
+void chv_phy_powergate_lanes(struct intel_encoder *encoder,
+			     bool override, unsigned int mask)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base));
+	enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
+
+	mutex_lock(&power_domains->lock);
+
+	dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch);
+	dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch);
+
+	if (override)
+		dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+	else
+		dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+
+	I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+	DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n",
+		      phy, ch, mask, dev_priv->chv_phy_control);
+
+	assert_chv_phy_status(dev_priv);
+
+	assert_chv_phy_powergate(dev_priv, phy, ch, override, mask);
+
+	mutex_unlock(&power_domains->lock);
+}
+
+static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
+					struct i915_power_well *power_well)
+{
+	enum pipe pipe = PIPE_A;
+	bool enabled;
+	u32 state, ctrl;
+
+	vlv_punit_get(dev_priv);
+
+	state = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe);
+	/*
+	 * We only ever set the power-on and power-gate states, anything
+	 * else is unexpected.
+	 */
+	WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe));
+	enabled = state == DP_SSS_PWR_ON(pipe);
+
+	/*
+	 * A transient state at this point would mean some unexpected party
+	 * is poking at the power controls too.
+	 */
+	ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSC_MASK(pipe);
+	WARN_ON(ctrl << 16 != state);
+
+	vlv_punit_put(dev_priv);
+
+	return enabled;
+}
+
+static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
+				    struct i915_power_well *power_well,
+				    bool enable)
+{
+	enum pipe pipe = PIPE_A;
+	u32 state;
+	u32 ctrl;
+
+	state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
+
+	vlv_punit_get(dev_priv);
+
+#define COND \
+	((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe)) == state)
+
+	if (COND)
+		goto out;
+
+	ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
+	ctrl &= ~DP_SSC_MASK(pipe);
+	ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe);
+	vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, ctrl);
+
+	if (wait_for(COND, 100))
+		DRM_ERROR("timeout setting power well state %08x (%08x)\n",
+			  state,
+			  vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM));
+
+#undef COND
+
+out:
+	vlv_punit_put(dev_priv);
+}
+
+static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
+				       struct i915_power_well *power_well)
+{
+	chv_set_pipe_power_well(dev_priv, power_well, true);
+
+	vlv_display_power_well_init(dev_priv);
+}
+
+static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv,
+					struct i915_power_well *power_well)
+{
+	vlv_display_power_well_deinit(dev_priv);
+
+	chv_set_pipe_power_well(dev_priv, power_well, false);
+}
+
+static u64 __async_put_domains_mask(struct i915_power_domains *power_domains)
+{
+	return power_domains->async_put_domains[0] |
+	       power_domains->async_put_domains[1];
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+
+static bool
+assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
+{
+	return !WARN_ON(power_domains->async_put_domains[0] &
+			power_domains->async_put_domains[1]);
+}
+
+static bool
+__async_put_domains_state_ok(struct i915_power_domains *power_domains)
+{
+	enum intel_display_power_domain domain;
+	bool err = false;
+
+	err |= !assert_async_put_domain_masks_disjoint(power_domains);
+	err |= WARN_ON(!!power_domains->async_put_wakeref !=
+		       !!__async_put_domains_mask(power_domains));
+
+	for_each_power_domain(domain, __async_put_domains_mask(power_domains))
+		err |= WARN_ON(power_domains->domain_use_count[domain] != 1);
+
+	return !err;
+}
+
+static void print_power_domains(struct i915_power_domains *power_domains,
+				const char *prefix, u64 mask)
+{
+	enum intel_display_power_domain domain;
+
+	DRM_DEBUG_DRIVER("%s (%lu):\n", prefix, hweight64(mask));
+	for_each_power_domain(domain, mask)
+		DRM_DEBUG_DRIVER("%s use_count %d\n",
+				 intel_display_power_domain_str(domain),
+				 power_domains->domain_use_count[domain]);
+}
+
+static void
+print_async_put_domains_state(struct i915_power_domains *power_domains)
+{
+	DRM_DEBUG_DRIVER("async_put_wakeref %u\n",
+			 power_domains->async_put_wakeref);
+
+	print_power_domains(power_domains, "async_put_domains[0]",
+			    power_domains->async_put_domains[0]);
+	print_power_domains(power_domains, "async_put_domains[1]",
+			    power_domains->async_put_domains[1]);
+}
+
+static void
+verify_async_put_domains_state(struct i915_power_domains *power_domains)
+{
+	if (!__async_put_domains_state_ok(power_domains))
+		print_async_put_domains_state(power_domains);
+}
+
+#else
+
+static void
+assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
+{
+}
+
+static void
+verify_async_put_domains_state(struct i915_power_domains *power_domains)
+{
+}
+
+#endif /* CONFIG_DRM_I915_DEBUG_RUNTIME_PM */
+
+static u64 async_put_domains_mask(struct i915_power_domains *power_domains)
+{
+	assert_async_put_domain_masks_disjoint(power_domains);
+
+	return __async_put_domains_mask(power_domains);
+}
+
+static void
+async_put_domains_clear_domain(struct i915_power_domains *power_domains,
+			       enum intel_display_power_domain domain)
+{
+	assert_async_put_domain_masks_disjoint(power_domains);
+
+	power_domains->async_put_domains[0] &= ~BIT_ULL(domain);
+	power_domains->async_put_domains[1] &= ~BIT_ULL(domain);
+}
+
+static bool
+intel_display_power_grab_async_put_ref(struct drm_i915_private *dev_priv,
+				       enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	bool ret = false;
+
+	if (!(async_put_domains_mask(power_domains) & BIT_ULL(domain)))
+		goto out_verify;
+
+	async_put_domains_clear_domain(power_domains, domain);
+
+	ret = true;
+
+	if (async_put_domains_mask(power_domains))
+		goto out_verify;
+
+	cancel_delayed_work(&power_domains->async_put_work);
+	intel_runtime_pm_put_raw(&dev_priv->runtime_pm,
+				 fetch_and_zero(&power_domains->async_put_wakeref));
+out_verify:
+	verify_async_put_domains_state(power_domains);
+
+	return ret;
+}
+
+static void
+__intel_display_power_get_domain(struct drm_i915_private *dev_priv,
+				 enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *power_well;
+
+	if (intel_display_power_grab_async_put_ref(dev_priv, domain))
+		return;
+
+	for_each_power_domain_well(dev_priv, power_well, BIT_ULL(domain))
+		intel_power_well_get(dev_priv, power_well);
+
+	power_domains->domain_use_count[domain]++;
+}
+
+/**
+ * intel_display_power_get - grab a power domain reference
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ *
+ * This function grabs a power domain reference for @domain and ensures that the
+ * power domain and all its parents are powered up. Therefore users should only
+ * grab a reference to the innermost power domain they need.
+ *
+ * Any power domain reference obtained by this function must have a symmetric
+ * call to intel_display_power_put() to release the reference again.
+ */
+intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
+					enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	intel_wakeref_t wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
+
+	mutex_lock(&power_domains->lock);
+	__intel_display_power_get_domain(dev_priv, domain);
+	mutex_unlock(&power_domains->lock);
+
+	return wakeref;
+}
+
+/**
+ * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ *
+ * This function grabs a power domain reference for @domain and ensures that the
+ * power domain and all its parents are powered up. Therefore users should only
+ * grab a reference to the innermost power domain they need.
+ *
+ * Any power domain reference obtained by this function must have a symmetric
+ * call to intel_display_power_put() to release the reference again.
+ */
+intel_wakeref_t
+intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
+				   enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	intel_wakeref_t wakeref;
+	bool is_enabled;
+
+	wakeref = intel_runtime_pm_get_if_in_use(&dev_priv->runtime_pm);
+	if (!wakeref)
+		return false;
+
+	mutex_lock(&power_domains->lock);
+
+	if (__intel_display_power_is_enabled(dev_priv, domain)) {
+		__intel_display_power_get_domain(dev_priv, domain);
+		is_enabled = true;
+	} else {
+		is_enabled = false;
+	}
+
+	mutex_unlock(&power_domains->lock);
+
+	if (!is_enabled) {
+		intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+		wakeref = 0;
+	}
+
+	return wakeref;
+}
+
+static void
+__intel_display_power_put_domain(struct drm_i915_private *dev_priv,
+				 enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains;
+	struct i915_power_well *power_well;
+	const char *name = intel_display_power_domain_str(domain);
+
+	power_domains = &dev_priv->power_domains;
+
+	WARN(!power_domains->domain_use_count[domain],
+	     "Use count on domain %s is already zero\n",
+	     name);
+	WARN(async_put_domains_mask(power_domains) & BIT_ULL(domain),
+	     "Async disabling of domain %s is pending\n",
+	     name);
+
+	power_domains->domain_use_count[domain]--;
+
+	for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain))
+		intel_power_well_put(dev_priv, power_well);
+}
+
+static void __intel_display_power_put(struct drm_i915_private *dev_priv,
+				      enum intel_display_power_domain domain)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+
+	mutex_lock(&power_domains->lock);
+	__intel_display_power_put_domain(dev_priv, domain);
+	mutex_unlock(&power_domains->lock);
+}
+
+/**
+ * intel_display_power_put_unchecked - release an unchecked power domain reference
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ *
+ * This function drops the power domain reference obtained by
+ * intel_display_power_get() and might power down the corresponding hardware
+ * block right away if this is the last reference.
+ *
+ * This function exists only for historical reasons and should be avoided in
+ * new code, as the correctness of its use cannot be checked. Always use
+ * intel_display_power_put() instead.
+ */
+void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
+				       enum intel_display_power_domain domain)
+{
+	__intel_display_power_put(dev_priv, domain);
+	intel_runtime_pm_put_unchecked(&dev_priv->runtime_pm);
+}
+
+static void
+queue_async_put_domains_work(struct i915_power_domains *power_domains,
+			     intel_wakeref_t wakeref)
+{
+	WARN_ON(power_domains->async_put_wakeref);
+	power_domains->async_put_wakeref = wakeref;
+	WARN_ON(!queue_delayed_work(system_unbound_wq,
+				    &power_domains->async_put_work,
+				    msecs_to_jiffies(100)));
+}
+
+static void
+release_async_put_domains(struct i915_power_domains *power_domains, u64 mask)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(power_domains, struct drm_i915_private,
+			     power_domains);
+	struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
+	enum intel_display_power_domain domain;
+	intel_wakeref_t wakeref;
+
+	/*
+	 * The caller must hold already raw wakeref, upgrade that to a proper
+	 * wakeref to make the state checker happy about the HW access during
+	 * power well disabling.
+	 */
+	assert_rpm_raw_wakeref_held(rpm);
+	wakeref = intel_runtime_pm_get(rpm);
+
+	for_each_power_domain(domain, mask) {
+		/* Clear before put, so put's sanity check is happy. */
+		async_put_domains_clear_domain(power_domains, domain);
+		__intel_display_power_put_domain(dev_priv, domain);
+	}
+
+	intel_runtime_pm_put(rpm, wakeref);
+}
+
+static void
+intel_display_power_put_async_work(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, struct drm_i915_private,
+			     power_domains.async_put_work.work);
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
+	intel_wakeref_t new_work_wakeref = intel_runtime_pm_get_raw(rpm);
+	intel_wakeref_t old_work_wakeref = 0;
+
+	mutex_lock(&power_domains->lock);
+
+	/*
+	 * Bail out if all the domain refs pending to be released were grabbed
+	 * by subsequent gets or a flush_work.
+	 */
+	old_work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
+	if (!old_work_wakeref)
+		goto out_verify;
+
+	release_async_put_domains(power_domains,
+				  power_domains->async_put_domains[0]);
+
+	/* Requeue the work if more domains were async put meanwhile. */
+	if (power_domains->async_put_domains[1]) {
+		power_domains->async_put_domains[0] =
+			fetch_and_zero(&power_domains->async_put_domains[1]);
+		queue_async_put_domains_work(power_domains,
+					     fetch_and_zero(&new_work_wakeref));
+	}
+
+out_verify:
+	verify_async_put_domains_state(power_domains);
+
+	mutex_unlock(&power_domains->lock);
+
+	if (old_work_wakeref)
+		intel_runtime_pm_put_raw(rpm, old_work_wakeref);
+	if (new_work_wakeref)
+		intel_runtime_pm_put_raw(rpm, new_work_wakeref);
+}
+
+/**
+ * intel_display_power_put_async - release a power domain reference asynchronously
+ * @i915: i915 device instance
+ * @domain: power domain to reference
+ * @wakeref: wakeref acquired for the reference that is being released
+ *
+ * This function drops the power domain reference obtained by
+ * intel_display_power_get*() and schedules a work to power down the
+ * corresponding hardware block if this is the last reference.
+ */
+void __intel_display_power_put_async(struct drm_i915_private *i915,
+				     enum intel_display_power_domain domain,
+				     intel_wakeref_t wakeref)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+	struct intel_runtime_pm *rpm = &i915->runtime_pm;
+	intel_wakeref_t work_wakeref = intel_runtime_pm_get_raw(rpm);
+
+	mutex_lock(&power_domains->lock);
+
+	if (power_domains->domain_use_count[domain] > 1) {
+		__intel_display_power_put_domain(i915, domain);
+
+		goto out_verify;
+	}
+
+	WARN_ON(power_domains->domain_use_count[domain] != 1);
+
+	/* Let a pending work requeue itself or queue a new one. */
+	if (power_domains->async_put_wakeref) {
+		power_domains->async_put_domains[1] |= BIT_ULL(domain);
+	} else {
+		power_domains->async_put_domains[0] |= BIT_ULL(domain);
+		queue_async_put_domains_work(power_domains,
+					     fetch_and_zero(&work_wakeref));
+	}
+
+out_verify:
+	verify_async_put_domains_state(power_domains);
+
+	mutex_unlock(&power_domains->lock);
+
+	if (work_wakeref)
+		intel_runtime_pm_put_raw(rpm, work_wakeref);
+
+	intel_runtime_pm_put(rpm, wakeref);
+}
+
+/**
+ * intel_display_power_flush_work - flushes the async display power disabling work
+ * @i915: i915 device instance
+ *
+ * Flushes any pending work that was scheduled by a preceding
+ * intel_display_power_put_async() call, completing the disabling of the
+ * corresponding power domains.
+ *
+ * Note that the work handler function may still be running after this
+ * function returns; to ensure that the work handler isn't running use
+ * intel_display_power_flush_work_sync() instead.
+ */
+void intel_display_power_flush_work(struct drm_i915_private *i915)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+	intel_wakeref_t work_wakeref;
+
+	mutex_lock(&power_domains->lock);
+
+	work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
+	if (!work_wakeref)
+		goto out_verify;
+
+	release_async_put_domains(power_domains,
+				  async_put_domains_mask(power_domains));
+	cancel_delayed_work(&power_domains->async_put_work);
+
+out_verify:
+	verify_async_put_domains_state(power_domains);
+
+	mutex_unlock(&power_domains->lock);
+
+	if (work_wakeref)
+		intel_runtime_pm_put_raw(&i915->runtime_pm, work_wakeref);
+}
+
+/**
+ * intel_display_power_flush_work_sync - flushes and syncs the async display power disabling work
+ * @i915: i915 device instance
+ *
+ * Like intel_display_power_flush_work(), but also ensure that the work
+ * handler function is not running any more when this function returns.
+ */
+static void
+intel_display_power_flush_work_sync(struct drm_i915_private *i915)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+
+	intel_display_power_flush_work(i915);
+	cancel_delayed_work_sync(&power_domains->async_put_work);
+
+	verify_async_put_domains_state(power_domains);
+
+	WARN_ON(power_domains->async_put_wakeref);
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+/**
+ * intel_display_power_put - release a power domain reference
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ * @wakeref: wakeref acquired for the reference that is being released
+ *
+ * This function drops the power domain reference obtained by
+ * intel_display_power_get() and might power down the corresponding hardware
+ * block right away if this is the last reference.
+ */
+void intel_display_power_put(struct drm_i915_private *dev_priv,
+			     enum intel_display_power_domain domain,
+			     intel_wakeref_t wakeref)
+{
+	__intel_display_power_put(dev_priv, domain);
+	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+}
+#endif
+
+#define I830_PIPES_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PIPE_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |	\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DISPLAY_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_DISPLAY_CORE) |	\
+	BIT_ULL(POWER_DOMAIN_PIPE_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DSI) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_CRT) |		\
+	BIT_ULL(POWER_DOMAIN_VGA) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_GMBUS) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_CMN_BC_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_CRT) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS (	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS (	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS (	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS (	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CHV_DISPLAY_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_DISPLAY_CORE) |	\
+	BIT_ULL(POWER_DOMAIN_PIPE_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |	\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DSI) |		\
+	BIT_ULL(POWER_DOMAIN_VGA) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_D) |		\
+	BIT_ULL(POWER_DOMAIN_GMBUS) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CHV_DPIO_CMN_BC_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CHV_DPIO_CMN_D_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_AUX_D) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define HSW_DISPLAY_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */	\
+	BIT_ULL(POWER_DOMAIN_VGA) |				\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define BDW_DISPLAY_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */	\
+	BIT_ULL(POWER_DOMAIN_VGA) |				\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_VGA) |				\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
+	SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
+	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
+	BIT_ULL(POWER_DOMAIN_MODESET) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_VGA) |				\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define BXT_DISPLAY_DC_OFF_POWER_DOMAINS (		\
+	BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
+	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
+	BIT_ULL(POWER_DOMAIN_MODESET) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_GMBUS) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define BXT_DPIO_CMN_A_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define BXT_DPIO_CMN_BC_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_VGA) |				\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
+#define GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
+#define GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
+#define GLK_DPIO_CMN_A_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DPIO_CMN_B_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DPIO_CMN_C_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_AUX_A_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_IO_A) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_AUX_B_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_AUX_C_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_DC_OFF_POWER_DOMAINS (		\
+	GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
+	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
+	BIT_ULL(POWER_DOMAIN_MODESET) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_GMBUS) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_F) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_VGA) |				\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_A_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_IO_A) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_B_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_C_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_D_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_F_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_F) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
+	CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
+	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
+	BIT_ULL(POWER_DOMAIN_MODESET) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+/*
+ * ICL PW_0/PG_0 domains (HW/DMC control):
+ * - PCI
+ * - clocks except port PLL
+ * - central power except FBC
+ * - shared functions except pipe interrupts, pipe MBUS, DBUF registers
+ * ICL PW_1/PG_1 domains (HW/DMC control):
+ * - DBUF function
+ * - PIPE_A and its planes, except VGA
+ * - transcoder EDP + PSR
+ * - transcoder DSI
+ * - DDI_A
+ * - FBC
+ */
+#define ICL_PW_4_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PIPE_C) |			\
+	BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_INIT))
+	/* VDSC/joining */
+#define ICL_PW_3_POWER_DOMAINS (			\
+	ICL_PW_4_POWER_DOMAINS |			\
+	BIT_ULL(POWER_DOMAIN_PIPE_B) |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |		\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |		\
+	BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) |	\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_B) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_E) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_F) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT1) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT2) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT3) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT4) |		\
+	BIT_ULL(POWER_DOMAIN_VGA) |			\
+	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+	/*
+	 * - transcoder WD
+	 * - KVMR (HW control)
+	 */
+#define ICL_PW_2_POWER_DOMAINS (			\
+	ICL_PW_3_POWER_DOMAINS |			\
+	BIT_ULL(POWER_DOMAIN_TRANSCODER_EDP_VDSC) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
+	/*
+	 * - KVMR (HW control)
+	 */
+#define ICL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
+	ICL_PW_2_POWER_DOMAINS |			\
+	BIT_ULL(POWER_DOMAIN_MODESET) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
+
+#define ICL_DDI_IO_A_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
+#define ICL_DDI_IO_B_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
+#define ICL_DDI_IO_C_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
+#define ICL_DDI_IO_D_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO))
+#define ICL_DDI_IO_E_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO))
+#define ICL_DDI_IO_F_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO))
+
+#define ICL_AUX_A_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_IO_A) |		\
+	BIT_ULL(POWER_DOMAIN_AUX_A))
+#define ICL_AUX_B_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_B))
+#define ICL_AUX_C_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_C))
+#define ICL_AUX_D_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_D))
+#define ICL_AUX_E_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_E))
+#define ICL_AUX_F_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_F))
+#define ICL_AUX_TBT1_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT1))
+#define ICL_AUX_TBT2_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT2))
+#define ICL_AUX_TBT3_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT3))
+#define ICL_AUX_TBT4_IO_POWER_DOMAINS (			\
+	BIT_ULL(POWER_DOMAIN_AUX_TBT4))
+
+static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = i9xx_always_on_power_well_noop,
+	.disable = i9xx_always_on_power_well_noop,
+	.is_enabled = i9xx_always_on_power_well_enabled,
+};
+
+static const struct i915_power_well_ops chv_pipe_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = chv_pipe_power_well_enable,
+	.disable = chv_pipe_power_well_disable,
+	.is_enabled = chv_pipe_power_well_enabled,
+};
+
+static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = chv_dpio_cmn_power_well_enable,
+	.disable = chv_dpio_cmn_power_well_disable,
+	.is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_desc i9xx_always_on_power_well[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+};
+
+static const struct i915_power_well_ops i830_pipes_power_well_ops = {
+	.sync_hw = i830_pipes_power_well_sync_hw,
+	.enable = i830_pipes_power_well_enable,
+	.disable = i830_pipes_power_well_disable,
+	.is_enabled = i830_pipes_power_well_enabled,
+};
+
+static const struct i915_power_well_desc i830_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "pipes",
+		.domains = I830_PIPES_POWER_DOMAINS,
+		.ops = &i830_pipes_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+};
+
+static const struct i915_power_well_ops hsw_power_well_ops = {
+	.sync_hw = hsw_power_well_sync_hw,
+	.enable = hsw_power_well_enable,
+	.disable = hsw_power_well_disable,
+	.is_enabled = hsw_power_well_enabled,
+};
+
+static const struct i915_power_well_ops gen9_dc_off_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = gen9_dc_off_power_well_enable,
+	.disable = gen9_dc_off_power_well_disable,
+	.is_enabled = gen9_dc_off_power_well_enabled,
+};
+
+static const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = bxt_dpio_cmn_power_well_enable,
+	.disable = bxt_dpio_cmn_power_well_disable,
+	.is_enabled = bxt_dpio_cmn_power_well_enabled,
+};
+
+static const struct i915_power_well_regs hsw_power_well_regs = {
+	.bios	= HSW_PWR_WELL_CTL1,
+	.driver	= HSW_PWR_WELL_CTL2,
+	.kvmr	= HSW_PWR_WELL_CTL3,
+	.debug	= HSW_PWR_WELL_CTL4,
+};
+
+static const struct i915_power_well_desc hsw_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "display",
+		.domains = HSW_DISPLAY_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = HSW_DISP_PW_GLOBAL,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
+			.hsw.has_vga = true,
+		},
+	},
+};
+
+static const struct i915_power_well_desc bdw_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "display",
+		.domains = BDW_DISPLAY_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = HSW_DISP_PW_GLOBAL,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
+			.hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+			.hsw.has_vga = true,
+		},
+	},
+};
+
+static const struct i915_power_well_ops vlv_display_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = vlv_display_power_well_enable,
+	.disable = vlv_display_power_well_disable,
+	.is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = vlv_dpio_cmn_power_well_enable,
+	.disable = vlv_dpio_cmn_power_well_disable,
+	.is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
+	.sync_hw = i9xx_power_well_sync_hw_noop,
+	.enable = vlv_power_well_enable,
+	.disable = vlv_power_well_disable,
+	.is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_desc vlv_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "display",
+		.domains = VLV_DISPLAY_POWER_DOMAINS,
+		.ops = &vlv_display_power_well_ops,
+		.id = VLV_DISP_PW_DISP2D,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DISP2D,
+		},
+	},
+	{
+		.name = "dpio-tx-b-01",
+		.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+		.ops = &vlv_dpio_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_01,
+		},
+	},
+	{
+		.name = "dpio-tx-b-23",
+		.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+		.ops = &vlv_dpio_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_23,
+		},
+	},
+	{
+		.name = "dpio-tx-c-01",
+		.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+		.ops = &vlv_dpio_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_01,
+		},
+	},
+	{
+		.name = "dpio-tx-c-23",
+		.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+			   VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+		.ops = &vlv_dpio_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_23,
+		},
+	},
+	{
+		.name = "dpio-common",
+		.domains = VLV_DPIO_CMN_BC_POWER_DOMAINS,
+		.ops = &vlv_dpio_cmn_power_well_ops,
+		.id = VLV_DISP_PW_DPIO_CMN_BC,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
+		},
+	},
+};
+
+static const struct i915_power_well_desc chv_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "display",
+		/*
+		 * Pipe A power well is the new disp2d well. Pipe B and C
+		 * power wells don't actually exist. Pipe A power well is
+		 * required for any pipe to work.
+		 */
+		.domains = CHV_DISPLAY_POWER_DOMAINS,
+		.ops = &chv_pipe_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "dpio-common-bc",
+		.domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
+		.ops = &chv_dpio_cmn_power_well_ops,
+		.id = VLV_DISP_PW_DPIO_CMN_BC,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
+		},
+	},
+	{
+		.name = "dpio-common-d",
+		.domains = CHV_DPIO_CMN_D_POWER_DOMAINS,
+		.ops = &chv_dpio_cmn_power_well_ops,
+		.id = CHV_DISP_PW_DPIO_CMN_D,
+		{
+			.vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_D,
+		},
+	},
+};
+
+bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
+					 enum i915_power_well_id power_well_id)
+{
+	struct i915_power_well *power_well;
+	bool ret;
+
+	power_well = lookup_power_well(dev_priv, power_well_id);
+	ret = power_well->desc->ops->is_enabled(dev_priv, power_well);
+
+	return ret;
+}
+
+static const struct i915_power_well_desc skl_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 1",
+		/* Handled by the DMC firmware */
+		.always_on = true,
+		.domains = 0,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_1,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_1,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "MISC IO power well",
+		/* Handled by the DMC firmware */
+		.always_on = true,
+		.domains = 0,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_MISC_IO,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_MISC_IO,
+		},
+	},
+	{
+		.name = "DC off",
+		.domains = SKL_DISPLAY_DC_OFF_POWER_DOMAINS,
+		.ops = &gen9_dc_off_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 2",
+		.domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_2,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_2,
+			.hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+			.hsw.has_vga = true,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "DDI A/E IO power well",
+		.domains = SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_A_E,
+		},
+	},
+	{
+		.name = "DDI B IO power well",
+		.domains = SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_B,
+		},
+	},
+	{
+		.name = "DDI C IO power well",
+		.domains = SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_C,
+		},
+	},
+	{
+		.name = "DDI D IO power well",
+		.domains = SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_D,
+		},
+	},
+};
+
+static const struct i915_power_well_desc bxt_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 1",
+		/* Handled by the DMC firmware */
+		.always_on = true,
+		.domains = 0,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_1,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_1,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "DC off",
+		.domains = BXT_DISPLAY_DC_OFF_POWER_DOMAINS,
+		.ops = &gen9_dc_off_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 2",
+		.domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_2,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_2,
+			.hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+			.hsw.has_vga = true,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "dpio-common-a",
+		.domains = BXT_DPIO_CMN_A_POWER_DOMAINS,
+		.ops = &bxt_dpio_cmn_power_well_ops,
+		.id = BXT_DISP_PW_DPIO_CMN_A,
+		{
+			.bxt.phy = DPIO_PHY1,
+		},
+	},
+	{
+		.name = "dpio-common-bc",
+		.domains = BXT_DPIO_CMN_BC_POWER_DOMAINS,
+		.ops = &bxt_dpio_cmn_power_well_ops,
+		.id = VLV_DISP_PW_DPIO_CMN_BC,
+		{
+			.bxt.phy = DPIO_PHY0,
+		},
+	},
+};
+
+static const struct i915_power_well_desc glk_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 1",
+		/* Handled by the DMC firmware */
+		.always_on = true,
+		.domains = 0,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_1,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_1,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "DC off",
+		.domains = GLK_DISPLAY_DC_OFF_POWER_DOMAINS,
+		.ops = &gen9_dc_off_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 2",
+		.domains = GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_2,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_2,
+			.hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+			.hsw.has_vga = true,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "dpio-common-a",
+		.domains = GLK_DPIO_CMN_A_POWER_DOMAINS,
+		.ops = &bxt_dpio_cmn_power_well_ops,
+		.id = BXT_DISP_PW_DPIO_CMN_A,
+		{
+			.bxt.phy = DPIO_PHY1,
+		},
+	},
+	{
+		.name = "dpio-common-b",
+		.domains = GLK_DPIO_CMN_B_POWER_DOMAINS,
+		.ops = &bxt_dpio_cmn_power_well_ops,
+		.id = VLV_DISP_PW_DPIO_CMN_BC,
+		{
+			.bxt.phy = DPIO_PHY0,
+		},
+	},
+	{
+		.name = "dpio-common-c",
+		.domains = GLK_DPIO_CMN_C_POWER_DOMAINS,
+		.ops = &bxt_dpio_cmn_power_well_ops,
+		.id = GLK_DISP_PW_DPIO_CMN_C,
+		{
+			.bxt.phy = DPIO_PHY2,
+		},
+	},
+	{
+		.name = "AUX A",
+		.domains = GLK_DISPLAY_AUX_A_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_AUX_A,
+		},
+	},
+	{
+		.name = "AUX B",
+		.domains = GLK_DISPLAY_AUX_B_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_AUX_B,
+		},
+	},
+	{
+		.name = "AUX C",
+		.domains = GLK_DISPLAY_AUX_C_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_AUX_C,
+		},
+	},
+	{
+		.name = "DDI A IO power well",
+		.domains = GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_DDI_A,
+		},
+	},
+	{
+		.name = "DDI B IO power well",
+		.domains = GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_B,
+		},
+	},
+	{
+		.name = "DDI C IO power well",
+		.domains = GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_C,
+		},
+	},
+};
+
+static const struct i915_power_well_desc cnl_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 1",
+		/* Handled by the DMC firmware */
+		.always_on = true,
+		.domains = 0,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_1,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_1,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "AUX A",
+		.domains = CNL_DISPLAY_AUX_A_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_AUX_A,
+		},
+	},
+	{
+		.name = "AUX B",
+		.domains = CNL_DISPLAY_AUX_B_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_AUX_B,
+		},
+	},
+	{
+		.name = "AUX C",
+		.domains = CNL_DISPLAY_AUX_C_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_AUX_C,
+		},
+	},
+	{
+		.name = "AUX D",
+		.domains = CNL_DISPLAY_AUX_D_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = CNL_PW_CTL_IDX_AUX_D,
+		},
+	},
+	{
+		.name = "DC off",
+		.domains = CNL_DISPLAY_DC_OFF_POWER_DOMAINS,
+		.ops = &gen9_dc_off_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 2",
+		.domains = CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_2,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_PW_2,
+			.hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+			.hsw.has_vga = true,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "DDI A IO power well",
+		.domains = CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = GLK_PW_CTL_IDX_DDI_A,
+		},
+	},
+	{
+		.name = "DDI B IO power well",
+		.domains = CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_B,
+		},
+	},
+	{
+		.name = "DDI C IO power well",
+		.domains = CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_C,
+		},
+	},
+	{
+		.name = "DDI D IO power well",
+		.domains = CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = SKL_PW_CTL_IDX_DDI_D,
+		},
+	},
+	{
+		.name = "DDI F IO power well",
+		.domains = CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = CNL_PW_CTL_IDX_DDI_F,
+		},
+	},
+	{
+		.name = "AUX F",
+		.domains = CNL_DISPLAY_AUX_F_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = CNL_PW_CTL_IDX_AUX_F,
+		},
+	},
+};
+
+static const struct i915_power_well_ops icl_combo_phy_aux_power_well_ops = {
+	.sync_hw = hsw_power_well_sync_hw,
+	.enable = icl_combo_phy_aux_power_well_enable,
+	.disable = icl_combo_phy_aux_power_well_disable,
+	.is_enabled = hsw_power_well_enabled,
+};
+
+static const struct i915_power_well_ops icl_tc_phy_aux_power_well_ops = {
+	.sync_hw = hsw_power_well_sync_hw,
+	.enable = icl_tc_phy_aux_power_well_enable,
+	.disable = hsw_power_well_disable,
+	.is_enabled = hsw_power_well_enabled,
+};
+
+static const struct i915_power_well_regs icl_aux_power_well_regs = {
+	.bios	= ICL_PWR_WELL_CTL_AUX1,
+	.driver	= ICL_PWR_WELL_CTL_AUX2,
+	.debug	= ICL_PWR_WELL_CTL_AUX4,
+};
+
+static const struct i915_power_well_regs icl_ddi_power_well_regs = {
+	.bios	= ICL_PWR_WELL_CTL_DDI1,
+	.driver	= ICL_PWR_WELL_CTL_DDI2,
+	.debug	= ICL_PWR_WELL_CTL_DDI4,
+};
+
+static const struct i915_power_well_desc icl_power_wells[] = {
+	{
+		.name = "always-on",
+		.always_on = true,
+		.domains = POWER_DOMAIN_MASK,
+		.ops = &i9xx_always_on_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 1",
+		/* Handled by the DMC firmware */
+		.always_on = true,
+		.domains = 0,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_1,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_PW_1,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "DC off",
+		.domains = ICL_DISPLAY_DC_OFF_POWER_DOMAINS,
+		.ops = &gen9_dc_off_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+	},
+	{
+		.name = "power well 2",
+		.domains = ICL_PW_2_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = SKL_DISP_PW_2,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_PW_2,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "power well 3",
+		.domains = ICL_PW_3_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_PW_3,
+			.hsw.irq_pipe_mask = BIT(PIPE_B),
+			.hsw.has_vga = true,
+			.hsw.has_fuses = true,
+		},
+	},
+	{
+		.name = "DDI A IO",
+		.domains = ICL_DDI_IO_A_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_ddi_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_DDI_A,
+		},
+	},
+	{
+		.name = "DDI B IO",
+		.domains = ICL_DDI_IO_B_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_ddi_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_DDI_B,
+		},
+	},
+	{
+		.name = "DDI C IO",
+		.domains = ICL_DDI_IO_C_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_ddi_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_DDI_C,
+		},
+	},
+	{
+		.name = "DDI D IO",
+		.domains = ICL_DDI_IO_D_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_ddi_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_DDI_D,
+		},
+	},
+	{
+		.name = "DDI E IO",
+		.domains = ICL_DDI_IO_E_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_ddi_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_DDI_E,
+		},
+	},
+	{
+		.name = "DDI F IO",
+		.domains = ICL_DDI_IO_F_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_ddi_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_DDI_F,
+		},
+	},
+	{
+		.name = "AUX A",
+		.domains = ICL_AUX_A_IO_POWER_DOMAINS,
+		.ops = &icl_combo_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_A,
+		},
+	},
+	{
+		.name = "AUX B",
+		.domains = ICL_AUX_B_IO_POWER_DOMAINS,
+		.ops = &icl_combo_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_B,
+		},
+	},
+	{
+		.name = "AUX C",
+		.domains = ICL_AUX_C_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_C,
+			.hsw.is_tc_tbt = false,
+		},
+	},
+	{
+		.name = "AUX D",
+		.domains = ICL_AUX_D_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_D,
+			.hsw.is_tc_tbt = false,
+		},
+	},
+	{
+		.name = "AUX E",
+		.domains = ICL_AUX_E_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_E,
+			.hsw.is_tc_tbt = false,
+		},
+	},
+	{
+		.name = "AUX F",
+		.domains = ICL_AUX_F_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_F,
+			.hsw.is_tc_tbt = false,
+		},
+	},
+	{
+		.name = "AUX TBT1",
+		.domains = ICL_AUX_TBT1_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_TBT1,
+			.hsw.is_tc_tbt = true,
+		},
+	},
+	{
+		.name = "AUX TBT2",
+		.domains = ICL_AUX_TBT2_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_TBT2,
+			.hsw.is_tc_tbt = true,
+		},
+	},
+	{
+		.name = "AUX TBT3",
+		.domains = ICL_AUX_TBT3_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_TBT3,
+			.hsw.is_tc_tbt = true,
+		},
+	},
+	{
+		.name = "AUX TBT4",
+		.domains = ICL_AUX_TBT4_IO_POWER_DOMAINS,
+		.ops = &icl_tc_phy_aux_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &icl_aux_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_AUX_TBT4,
+			.hsw.is_tc_tbt = true,
+		},
+	},
+	{
+		.name = "power well 4",
+		.domains = ICL_PW_4_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = DISP_PW_ID_NONE,
+		{
+			.hsw.regs = &hsw_power_well_regs,
+			.hsw.idx = ICL_PW_CTL_IDX_PW_4,
+			.hsw.has_fuses = true,
+			.hsw.irq_pipe_mask = BIT(PIPE_C),
+		},
+	},
+};
+
+static int
+sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv,
+				   int disable_power_well)
+{
+	if (disable_power_well >= 0)
+		return !!disable_power_well;
+
+	return 1;
+}
+
+static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
+			       int enable_dc)
+{
+	u32 mask;
+	int requested_dc;
+	int max_dc;
+
+	if (INTEL_GEN(dev_priv) >= 11) {
+		max_dc = 2;
+		/*
+		 * DC9 has a separate HW flow from the rest of the DC states,
+		 * not depending on the DMC firmware. It's needed by system
+		 * suspend/resume, so allow it unconditionally.
+		 */
+		mask = DC_STATE_EN_DC9;
+	} else if (IS_GEN(dev_priv, 10) || IS_GEN9_BC(dev_priv)) {
+		max_dc = 2;
+		mask = 0;
+	} else if (IS_GEN9_LP(dev_priv)) {
+		max_dc = 1;
+		mask = DC_STATE_EN_DC9;
+	} else {
+		max_dc = 0;
+		mask = 0;
+	}
+
+	if (!i915_modparams.disable_power_well)
+		max_dc = 0;
+
+	if (enable_dc >= 0 && enable_dc <= max_dc) {
+		requested_dc = enable_dc;
+	} else if (enable_dc == -1) {
+		requested_dc = max_dc;
+	} else if (enable_dc > max_dc && enable_dc <= 2) {
+		DRM_DEBUG_KMS("Adjusting requested max DC state (%d->%d)\n",
+			      enable_dc, max_dc);
+		requested_dc = max_dc;
+	} else {
+		DRM_ERROR("Unexpected value for enable_dc (%d)\n", enable_dc);
+		requested_dc = max_dc;
+	}
+
+	if (requested_dc > 1)
+		mask |= DC_STATE_EN_UPTO_DC6;
+	if (requested_dc > 0)
+		mask |= DC_STATE_EN_UPTO_DC5;
+
+	DRM_DEBUG_KMS("Allowed DC state mask %02x\n", mask);
+
+	return mask;
+}
+
+static int
+__set_power_wells(struct i915_power_domains *power_domains,
+		  const struct i915_power_well_desc *power_well_descs,
+		  int power_well_count)
+{
+	u64 power_well_ids = 0;
+	int i;
+
+	power_domains->power_well_count = power_well_count;
+	power_domains->power_wells =
+				kcalloc(power_well_count,
+					sizeof(*power_domains->power_wells),
+					GFP_KERNEL);
+	if (!power_domains->power_wells)
+		return -ENOMEM;
+
+	for (i = 0; i < power_well_count; i++) {
+		enum i915_power_well_id id = power_well_descs[i].id;
+
+		power_domains->power_wells[i].desc = &power_well_descs[i];
+
+		if (id == DISP_PW_ID_NONE)
+			continue;
+
+		WARN_ON(id >= sizeof(power_well_ids) * 8);
+		WARN_ON(power_well_ids & BIT_ULL(id));
+		power_well_ids |= BIT_ULL(id);
+	}
+
+	return 0;
+}
+
+#define set_power_wells(power_domains, __power_well_descs) \
+	__set_power_wells(power_domains, __power_well_descs, \
+			  ARRAY_SIZE(__power_well_descs))
+
+/**
+ * intel_power_domains_init - initializes the power domain structures
+ * @dev_priv: i915 device instance
+ *
+ * Initializes the power domain structures for @dev_priv depending upon the
+ * supported platform.
+ */
+int intel_power_domains_init(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	int err;
+
+	i915_modparams.disable_power_well =
+		sanitize_disable_power_well_option(dev_priv,
+						   i915_modparams.disable_power_well);
+	dev_priv->csr.allowed_dc_mask =
+		get_allowed_dc_mask(dev_priv, i915_modparams.enable_dc);
+
+	BUILD_BUG_ON(POWER_DOMAIN_NUM > 64);
+
+	mutex_init(&power_domains->lock);
+
+	INIT_DELAYED_WORK(&power_domains->async_put_work,
+			  intel_display_power_put_async_work);
+
+	/*
+	 * The enabling order will be from lower to higher indexed wells,
+	 * the disabling order is reversed.
+	 */
+	if (IS_GEN(dev_priv, 11)) {
+		err = set_power_wells(power_domains, icl_power_wells);
+	} else if (IS_CANNONLAKE(dev_priv)) {
+		err = set_power_wells(power_domains, cnl_power_wells);
+
+		/*
+		 * DDI and Aux IO are getting enabled for all ports
+		 * regardless the presence or use. So, in order to avoid
+		 * timeouts, lets remove them from the list
+		 * for the SKUs without port F.
+		 */
+		if (!IS_CNL_WITH_PORT_F(dev_priv))
+			power_domains->power_well_count -= 2;
+	} else if (IS_GEMINILAKE(dev_priv)) {
+		err = set_power_wells(power_domains, glk_power_wells);
+	} else if (IS_BROXTON(dev_priv)) {
+		err = set_power_wells(power_domains, bxt_power_wells);
+	} else if (IS_GEN9_BC(dev_priv)) {
+		err = set_power_wells(power_domains, skl_power_wells);
+	} else if (IS_CHERRYVIEW(dev_priv)) {
+		err = set_power_wells(power_domains, chv_power_wells);
+	} else if (IS_BROADWELL(dev_priv)) {
+		err = set_power_wells(power_domains, bdw_power_wells);
+	} else if (IS_HASWELL(dev_priv)) {
+		err = set_power_wells(power_domains, hsw_power_wells);
+	} else if (IS_VALLEYVIEW(dev_priv)) {
+		err = set_power_wells(power_domains, vlv_power_wells);
+	} else if (IS_I830(dev_priv)) {
+		err = set_power_wells(power_domains, i830_power_wells);
+	} else {
+		err = set_power_wells(power_domains, i9xx_always_on_power_well);
+	}
+
+	return err;
+}
+
+/**
+ * intel_power_domains_cleanup - clean up power domains resources
+ * @dev_priv: i915 device instance
+ *
+ * Release any resources acquired by intel_power_domains_init()
+ */
+void intel_power_domains_cleanup(struct drm_i915_private *dev_priv)
+{
+	kfree(dev_priv->power_domains.power_wells);
+}
+
+static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *power_well;
+
+	mutex_lock(&power_domains->lock);
+	for_each_power_well(dev_priv, power_well) {
+		power_well->desc->ops->sync_hw(dev_priv, power_well);
+		power_well->hw_enabled =
+			power_well->desc->ops->is_enabled(dev_priv, power_well);
+	}
+	mutex_unlock(&power_domains->lock);
+}
+
+static inline
+bool intel_dbuf_slice_set(struct drm_i915_private *dev_priv,
+			  i915_reg_t reg, bool enable)
+{
+	u32 val, status;
+
+	val = I915_READ(reg);
+	val = enable ? (val | DBUF_POWER_REQUEST) : (val & ~DBUF_POWER_REQUEST);
+	I915_WRITE(reg, val);
+	POSTING_READ(reg);
+	udelay(10);
+
+	status = I915_READ(reg) & DBUF_POWER_STATE;
+	if ((enable && !status) || (!enable && status)) {
+		DRM_ERROR("DBus power %s timeout!\n",
+			  enable ? "enable" : "disable");
+		return false;
+	}
+	return true;
+}
+
+static void gen9_dbuf_enable(struct drm_i915_private *dev_priv)
+{
+	intel_dbuf_slice_set(dev_priv, DBUF_CTL, true);
+}
+
+static void gen9_dbuf_disable(struct drm_i915_private *dev_priv)
+{
+	intel_dbuf_slice_set(dev_priv, DBUF_CTL, false);
+}
+
+static u8 intel_dbuf_max_slices(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) < 11)
+		return 1;
+	return 2;
+}
+
+void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
+			    u8 req_slices)
+{
+	const u8 hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices;
+	bool ret;
+
+	if (req_slices > intel_dbuf_max_slices(dev_priv)) {
+		DRM_ERROR("Invalid number of dbuf slices requested\n");
+		return;
+	}
+
+	if (req_slices == hw_enabled_slices || req_slices == 0)
+		return;
+
+	if (req_slices > hw_enabled_slices)
+		ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, true);
+	else
+		ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, false);
+
+	if (ret)
+		dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices;
+}
+
+static void icl_dbuf_enable(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) | DBUF_POWER_REQUEST);
+	I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) | DBUF_POWER_REQUEST);
+	POSTING_READ(DBUF_CTL_S2);
+
+	udelay(10);
+
+	if (!(I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
+	    !(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
+		DRM_ERROR("DBuf power enable timeout\n");
+	else
+		/*
+		 * FIXME: for now pretend that we only have 1 slice, see
+		 * intel_enabled_dbuf_slices_num().
+		 */
+		dev_priv->wm.skl_hw.ddb.enabled_slices = 1;
+}
+
+static void icl_dbuf_disable(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) & ~DBUF_POWER_REQUEST);
+	I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) & ~DBUF_POWER_REQUEST);
+	POSTING_READ(DBUF_CTL_S2);
+
+	udelay(10);
+
+	if ((I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
+	    (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
+		DRM_ERROR("DBuf power disable timeout!\n");
+	else
+		/*
+		 * FIXME: for now pretend that the first slice is always
+		 * enabled, see intel_enabled_dbuf_slices_num().
+		 */
+		dev_priv->wm.skl_hw.ddb.enabled_slices = 1;
+}
+
+static void icl_mbus_init(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = MBUS_ABOX_BT_CREDIT_POOL1(16) |
+	      MBUS_ABOX_BT_CREDIT_POOL2(16) |
+	      MBUS_ABOX_B_CREDIT(1) |
+	      MBUS_ABOX_BW_CREDIT(1);
+
+	I915_WRITE(MBUS_ABOX_CTL, val);
+}
+
+static void hsw_assert_cdclk(struct drm_i915_private *dev_priv)
+{
+	u32 val = I915_READ(LCPLL_CTL);
+
+	/*
+	 * The LCPLL register should be turned on by the BIOS. For now
+	 * let's just check its state and print errors in case
+	 * something is wrong.  Don't even try to turn it on.
+	 */
+
+	if (val & LCPLL_CD_SOURCE_FCLK)
+		DRM_ERROR("CDCLK source is not LCPLL\n");
+
+	if (val & LCPLL_PLL_DISABLE)
+		DRM_ERROR("LCPLL is disabled\n");
+
+	if ((val & LCPLL_REF_MASK) != LCPLL_REF_NON_SSC)
+		DRM_ERROR("LCPLL not using non-SSC reference\n");
+}
+
+static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct intel_crtc *crtc;
+
+	for_each_intel_crtc(dev, crtc)
+		I915_STATE_WARN(crtc->active, "CRTC for pipe %c enabled\n",
+				pipe_name(crtc->pipe));
+
+	I915_STATE_WARN(I915_READ(HSW_PWR_WELL_CTL2),
+			"Display power well on\n");
+	I915_STATE_WARN(I915_READ(SPLL_CTL) & SPLL_PLL_ENABLE,
+			"SPLL enabled\n");
+	I915_STATE_WARN(I915_READ(WRPLL_CTL(0)) & WRPLL_PLL_ENABLE,
+			"WRPLL1 enabled\n");
+	I915_STATE_WARN(I915_READ(WRPLL_CTL(1)) & WRPLL_PLL_ENABLE,
+			"WRPLL2 enabled\n");
+	I915_STATE_WARN(I915_READ(PP_STATUS(0)) & PP_ON,
+			"Panel power on\n");
+	I915_STATE_WARN(I915_READ(BLC_PWM_CPU_CTL2) & BLM_PWM_ENABLE,
+			"CPU PWM1 enabled\n");
+	if (IS_HASWELL(dev_priv))
+		I915_STATE_WARN(I915_READ(HSW_BLC_PWM2_CTL) & BLM_PWM_ENABLE,
+				"CPU PWM2 enabled\n");
+	I915_STATE_WARN(I915_READ(BLC_PWM_PCH_CTL1) & BLM_PCH_PWM_ENABLE,
+			"PCH PWM1 enabled\n");
+	I915_STATE_WARN(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
+			"Utility pin enabled\n");
+	I915_STATE_WARN(I915_READ(PCH_GTC_CTL) & PCH_GTC_ENABLE,
+			"PCH GTC enabled\n");
+
+	/*
+	 * In theory we can still leave IRQs enabled, as long as only the HPD
+	 * interrupts remain enabled. We used to check for that, but since it's
+	 * gen-specific and since we only disable LCPLL after we fully disable
+	 * the interrupts, the check below should be enough.
+	 */
+	I915_STATE_WARN(intel_irqs_enabled(dev_priv), "IRQs enabled\n");
+}
+
+static u32 hsw_read_dcomp(struct drm_i915_private *dev_priv)
+{
+	if (IS_HASWELL(dev_priv))
+		return I915_READ(D_COMP_HSW);
+	else
+		return I915_READ(D_COMP_BDW);
+}
+
+static void hsw_write_dcomp(struct drm_i915_private *dev_priv, u32 val)
+{
+	if (IS_HASWELL(dev_priv)) {
+		if (sandybridge_pcode_write(dev_priv,
+					    GEN6_PCODE_WRITE_D_COMP, val))
+			DRM_DEBUG_KMS("Failed to write to D_COMP\n");
+	} else {
+		I915_WRITE(D_COMP_BDW, val);
+		POSTING_READ(D_COMP_BDW);
+	}
+}
+
+/*
+ * This function implements pieces of two sequences from BSpec:
+ * - Sequence for display software to disable LCPLL
+ * - Sequence for display software to allow package C8+
+ * The steps implemented here are just the steps that actually touch the LCPLL
+ * register. Callers should take care of disabling all the display engine
+ * functions, doing the mode unset, fixing interrupts, etc.
+ */
+static void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
+			      bool switch_to_fclk, bool allow_power_down)
+{
+	u32 val;
+
+	assert_can_disable_lcpll(dev_priv);
+
+	val = I915_READ(LCPLL_CTL);
+
+	if (switch_to_fclk) {
+		val |= LCPLL_CD_SOURCE_FCLK;
+		I915_WRITE(LCPLL_CTL, val);
+
+		if (wait_for_us(I915_READ(LCPLL_CTL) &
+				LCPLL_CD_SOURCE_FCLK_DONE, 1))
+			DRM_ERROR("Switching to FCLK failed\n");
+
+		val = I915_READ(LCPLL_CTL);
+	}
+
+	val |= LCPLL_PLL_DISABLE;
+	I915_WRITE(LCPLL_CTL, val);
+	POSTING_READ(LCPLL_CTL);
+
+	if (intel_wait_for_register(&dev_priv->uncore, LCPLL_CTL,
+				    LCPLL_PLL_LOCK, 0, 1))
+		DRM_ERROR("LCPLL still locked\n");
+
+	val = hsw_read_dcomp(dev_priv);
+	val |= D_COMP_COMP_DISABLE;
+	hsw_write_dcomp(dev_priv, val);
+	ndelay(100);
+
+	if (wait_for((hsw_read_dcomp(dev_priv) &
+		      D_COMP_RCOMP_IN_PROGRESS) == 0, 1))
+		DRM_ERROR("D_COMP RCOMP still in progress\n");
+
+	if (allow_power_down) {
+		val = I915_READ(LCPLL_CTL);
+		val |= LCPLL_POWER_DOWN_ALLOW;
+		I915_WRITE(LCPLL_CTL, val);
+		POSTING_READ(LCPLL_CTL);
+	}
+}
+
+/*
+ * Fully restores LCPLL, disallowing power down and switching back to LCPLL
+ * source.
+ */
+static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	val = I915_READ(LCPLL_CTL);
+
+	if ((val & (LCPLL_PLL_LOCK | LCPLL_PLL_DISABLE | LCPLL_CD_SOURCE_FCLK |
+		    LCPLL_POWER_DOWN_ALLOW)) == LCPLL_PLL_LOCK)
+		return;
+
+	/*
+	 * Make sure we're not on PC8 state before disabling PC8, otherwise
+	 * we'll hang the machine. To prevent PC8 state, just enable force_wake.
+	 */
+	intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
+
+	if (val & LCPLL_POWER_DOWN_ALLOW) {
+		val &= ~LCPLL_POWER_DOWN_ALLOW;
+		I915_WRITE(LCPLL_CTL, val);
+		POSTING_READ(LCPLL_CTL);
+	}
+
+	val = hsw_read_dcomp(dev_priv);
+	val |= D_COMP_COMP_FORCE;
+	val &= ~D_COMP_COMP_DISABLE;
+	hsw_write_dcomp(dev_priv, val);
+
+	val = I915_READ(LCPLL_CTL);
+	val &= ~LCPLL_PLL_DISABLE;
+	I915_WRITE(LCPLL_CTL, val);
+
+	if (intel_wait_for_register(&dev_priv->uncore, LCPLL_CTL,
+				    LCPLL_PLL_LOCK, LCPLL_PLL_LOCK, 5))
+		DRM_ERROR("LCPLL not locked yet\n");
+
+	if (val & LCPLL_CD_SOURCE_FCLK) {
+		val = I915_READ(LCPLL_CTL);
+		val &= ~LCPLL_CD_SOURCE_FCLK;
+		I915_WRITE(LCPLL_CTL, val);
+
+		if (wait_for_us((I915_READ(LCPLL_CTL) &
+				 LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
+			DRM_ERROR("Switching back to LCPLL failed\n");
+	}
+
+	intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
+
+	intel_update_cdclk(dev_priv);
+	intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+}
+
+/*
+ * Package states C8 and deeper are really deep PC states that can only be
+ * reached when all the devices on the system allow it, so even if the graphics
+ * device allows PC8+, it doesn't mean the system will actually get to these
+ * states. Our driver only allows PC8+ when going into runtime PM.
+ *
+ * The requirements for PC8+ are that all the outputs are disabled, the power
+ * well is disabled and most interrupts are disabled, and these are also
+ * requirements for runtime PM. When these conditions are met, we manually do
+ * the other conditions: disable the interrupts, clocks and switch LCPLL refclk
+ * to Fclk. If we're in PC8+ and we get an non-hotplug interrupt, we can hard
+ * hang the machine.
+ *
+ * When we really reach PC8 or deeper states (not just when we allow it) we lose
+ * the state of some registers, so when we come back from PC8+ we need to
+ * restore this state. We don't get into PC8+ if we're not in RC6, so we don't
+ * need to take care of the registers kept by RC6. Notice that this happens even
+ * if we don't put the device in PCI D3 state (which is what currently happens
+ * because of the runtime PM support).
+ *
+ * For more, read "Display Sequences for Package C8" on the hardware
+ * documentation.
+ */
+void hsw_enable_pc8(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	DRM_DEBUG_KMS("Enabling package C8+\n");
+
+	if (HAS_PCH_LPT_LP(dev_priv)) {
+		val = I915_READ(SOUTH_DSPCLK_GATE_D);
+		val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
+		I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
+	}
+
+	lpt_disable_clkout_dp(dev_priv);
+	hsw_disable_lcpll(dev_priv, true, true);
+}
+
+void hsw_disable_pc8(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	DRM_DEBUG_KMS("Disabling package C8+\n");
+
+	hsw_restore_lcpll(dev_priv);
+	intel_init_pch_refclk(dev_priv);
+
+	if (HAS_PCH_LPT_LP(dev_priv)) {
+		val = I915_READ(SOUTH_DSPCLK_GATE_D);
+		val |= PCH_LP_PARTITION_LEVEL_DISABLE;
+		I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
+	}
+}
+
+static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
+				      bool enable)
+{
+	i915_reg_t reg;
+	u32 reset_bits, val;
+
+	if (IS_IVYBRIDGE(dev_priv)) {
+		reg = GEN7_MSG_CTL;
+		reset_bits = WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK;
+	} else {
+		reg = HSW_NDE_RSTWRN_OPT;
+		reset_bits = RESET_PCH_HANDSHAKE_ENABLE;
+	}
+
+	val = I915_READ(reg);
+
+	if (enable)
+		val |= reset_bits;
+	else
+		val &= ~reset_bits;
+
+	I915_WRITE(reg, val);
+}
+
+static void skl_display_core_init(struct drm_i915_private *dev_priv,
+				  bool resume)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	/* enable PCH reset handshake */
+	intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
+
+	/* enable PG1 and Misc I/O */
+	mutex_lock(&power_domains->lock);
+
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_enable(dev_priv, well);
+
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO);
+	intel_power_well_enable(dev_priv, well);
+
+	mutex_unlock(&power_domains->lock);
+
+	intel_cdclk_init(dev_priv);
+
+	gen9_dbuf_enable(dev_priv);
+
+	if (resume && dev_priv->csr.dmc_payload)
+		intel_csr_load_program(dev_priv);
+}
+
+static void skl_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	gen9_dbuf_disable(dev_priv);
+
+	intel_cdclk_uninit(dev_priv);
+
+	/* The spec doesn't call for removing the reset handshake flag */
+	/* disable PG1 and Misc I/O */
+
+	mutex_lock(&power_domains->lock);
+
+	/*
+	 * BSpec says to keep the MISC IO power well enabled here, only
+	 * remove our request for power well 1.
+	 * Note that even though the driver's request is removed power well 1
+	 * may stay enabled after this due to DMC's own request on it.
+	 */
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_disable(dev_priv, well);
+
+	mutex_unlock(&power_domains->lock);
+
+	usleep_range(10, 30);		/* 10 us delay per Bspec */
+}
+
+void bxt_display_core_init(struct drm_i915_private *dev_priv,
+			   bool resume)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	/*
+	 * NDE_RSTWRN_OPT RST PCH Handshake En must always be 0b on BXT
+	 * or else the reset will hang because there is no PCH to respond.
+	 * Move the handshake programming to initialization sequence.
+	 * Previously was left up to BIOS.
+	 */
+	intel_pch_reset_handshake(dev_priv, false);
+
+	/* Enable PG1 */
+	mutex_lock(&power_domains->lock);
+
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_enable(dev_priv, well);
+
+	mutex_unlock(&power_domains->lock);
+
+	intel_cdclk_init(dev_priv);
+
+	gen9_dbuf_enable(dev_priv);
+
+	if (resume && dev_priv->csr.dmc_payload)
+		intel_csr_load_program(dev_priv);
+}
+
+void bxt_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	gen9_dbuf_disable(dev_priv);
+
+	intel_cdclk_uninit(dev_priv);
+
+	/* The spec doesn't call for removing the reset handshake flag */
+
+	/*
+	 * Disable PW1 (PG1).
+	 * Note that even though the driver's request is removed power well 1
+	 * may stay enabled after this due to DMC's own request on it.
+	 */
+	mutex_lock(&power_domains->lock);
+
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_disable(dev_priv, well);
+
+	mutex_unlock(&power_domains->lock);
+
+	usleep_range(10, 30);		/* 10 us delay per Bspec */
+}
+
+static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	/* 1. Enable PCH Reset Handshake */
+	intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
+
+	/* 2-3. */
+	intel_combo_phy_init(dev_priv);
+
+	/*
+	 * 4. Enable Power Well 1 (PG1).
+	 *    The AUX IO power wells will be enabled on demand.
+	 */
+	mutex_lock(&power_domains->lock);
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_enable(dev_priv, well);
+	mutex_unlock(&power_domains->lock);
+
+	/* 5. Enable CD clock */
+	intel_cdclk_init(dev_priv);
+
+	/* 6. Enable DBUF */
+	gen9_dbuf_enable(dev_priv);
+
+	if (resume && dev_priv->csr.dmc_payload)
+		intel_csr_load_program(dev_priv);
+}
+
+static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	/* 1. Disable all display engine functions -> aready done */
+
+	/* 2. Disable DBUF */
+	gen9_dbuf_disable(dev_priv);
+
+	/* 3. Disable CD clock */
+	intel_cdclk_uninit(dev_priv);
+
+	/*
+	 * 4. Disable Power Well 1 (PG1).
+	 *    The AUX IO power wells are toggled on demand, so they are already
+	 *    disabled at this point.
+	 */
+	mutex_lock(&power_domains->lock);
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_disable(dev_priv, well);
+	mutex_unlock(&power_domains->lock);
+
+	usleep_range(10, 30);		/* 10 us delay per Bspec */
+
+	/* 5. */
+	intel_combo_phy_uninit(dev_priv);
+}
+
+void icl_display_core_init(struct drm_i915_private *dev_priv,
+			   bool resume)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	/* 1. Enable PCH reset handshake. */
+	intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
+
+	/* 2. Initialize all combo phys */
+	intel_combo_phy_init(dev_priv);
+
+	/*
+	 * 3. Enable Power Well 1 (PG1).
+	 *    The AUX IO power wells will be enabled on demand.
+	 */
+	mutex_lock(&power_domains->lock);
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_enable(dev_priv, well);
+	mutex_unlock(&power_domains->lock);
+
+	/* 4. Enable CDCLK. */
+	intel_cdclk_init(dev_priv);
+
+	/* 5. Enable DBUF. */
+	icl_dbuf_enable(dev_priv);
+
+	/* 6. Setup MBUS. */
+	icl_mbus_init(dev_priv);
+
+	if (resume && dev_priv->csr.dmc_payload)
+		intel_csr_load_program(dev_priv);
+}
+
+void icl_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *well;
+
+	gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+	/* 1. Disable all display engine functions -> aready done */
+
+	/* 2. Disable DBUF */
+	icl_dbuf_disable(dev_priv);
+
+	/* 3. Disable CD clock */
+	intel_cdclk_uninit(dev_priv);
+
+	/*
+	 * 4. Disable Power Well 1 (PG1).
+	 *    The AUX IO power wells are toggled on demand, so they are already
+	 *    disabled at this point.
+	 */
+	mutex_lock(&power_domains->lock);
+	well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+	intel_power_well_disable(dev_priv, well);
+	mutex_unlock(&power_domains->lock);
+
+	/* 5. */
+	intel_combo_phy_uninit(dev_priv);
+}
+
+static void chv_phy_control_init(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_well *cmn_bc =
+		lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+	struct i915_power_well *cmn_d =
+		lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
+
+	/*
+	 * DISPLAY_PHY_CONTROL can get corrupted if read. As a
+	 * workaround never ever read DISPLAY_PHY_CONTROL, and
+	 * instead maintain a shadow copy ourselves. Use the actual
+	 * power well state and lane status to reconstruct the
+	 * expected initial value.
+	 */
+	dev_priv->chv_phy_control =
+		PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
+		PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
+		PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) |
+		PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) |
+		PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0);
+
+	/*
+	 * If all lanes are disabled we leave the override disabled
+	 * with all power down bits cleared to match the state we
+	 * would use after disabling the port. Otherwise enable the
+	 * override and set the lane powerdown bits accding to the
+	 * current lane status.
+	 */
+	if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
+		u32 status = I915_READ(DPLL(PIPE_A));
+		unsigned int mask;
+
+		mask = status & DPLL_PORTB_READY_MASK;
+		if (mask == 0xf)
+			mask = 0x0;
+		else
+			dev_priv->chv_phy_control |=
+				PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0);
+
+		dev_priv->chv_phy_control |=
+			PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0);
+
+		mask = (status & DPLL_PORTC_READY_MASK) >> 4;
+		if (mask == 0xf)
+			mask = 0x0;
+		else
+			dev_priv->chv_phy_control |=
+				PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1);
+
+		dev_priv->chv_phy_control |=
+			PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1);
+
+		dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0);
+
+		dev_priv->chv_phy_assert[DPIO_PHY0] = false;
+	} else {
+		dev_priv->chv_phy_assert[DPIO_PHY0] = true;
+	}
+
+	if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
+		u32 status = I915_READ(DPIO_PHY_STATUS);
+		unsigned int mask;
+
+		mask = status & DPLL_PORTD_READY_MASK;
+
+		if (mask == 0xf)
+			mask = 0x0;
+		else
+			dev_priv->chv_phy_control |=
+				PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0);
+
+		dev_priv->chv_phy_control |=
+			PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0);
+
+		dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1);
+
+		dev_priv->chv_phy_assert[DPIO_PHY1] = false;
+	} else {
+		dev_priv->chv_phy_assert[DPIO_PHY1] = true;
+	}
+
+	I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+	DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n",
+		      dev_priv->chv_phy_control);
+}
+
+static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_well *cmn =
+		lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+	struct i915_power_well *disp2d =
+		lookup_power_well(dev_priv, VLV_DISP_PW_DISP2D);
+
+	/* If the display might be already active skip this */
+	if (cmn->desc->ops->is_enabled(dev_priv, cmn) &&
+	    disp2d->desc->ops->is_enabled(dev_priv, disp2d) &&
+	    I915_READ(DPIO_CTL) & DPIO_CMNRST)
+		return;
+
+	DRM_DEBUG_KMS("toggling display PHY side reset\n");
+
+	/* cmnlane needs DPLL registers */
+	disp2d->desc->ops->enable(dev_priv, disp2d);
+
+	/*
+	 * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
+	 * Need to assert and de-assert PHY SB reset by gating the
+	 * common lane power, then un-gating it.
+	 * Simply ungating isn't enough to reset the PHY enough to get
+	 * ports and lanes running.
+	 */
+	cmn->desc->ops->disable(dev_priv, cmn);
+}
+
+static bool vlv_punit_is_power_gated(struct drm_i915_private *dev_priv, u32 reg0)
+{
+	bool ret;
+
+	vlv_punit_get(dev_priv);
+	ret = (vlv_punit_read(dev_priv, reg0) & SSPM0_SSC_MASK) == SSPM0_SSC_PWR_GATE;
+	vlv_punit_put(dev_priv);
+
+	return ret;
+}
+
+static void assert_ved_power_gated(struct drm_i915_private *dev_priv)
+{
+	WARN(!vlv_punit_is_power_gated(dev_priv, PUNIT_REG_VEDSSPM0),
+	     "VED not power gated\n");
+}
+
+static void assert_isp_power_gated(struct drm_i915_private *dev_priv)
+{
+	static const struct pci_device_id isp_ids[] = {
+		{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f38)},
+		{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x22b8)},
+		{}
+	};
+
+	WARN(!pci_dev_present(isp_ids) &&
+	     !vlv_punit_is_power_gated(dev_priv, PUNIT_REG_ISPSSPM0),
+	     "ISP not power gated\n");
+}
+
+static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv);
+
+/**
+ * intel_power_domains_init_hw - initialize hardware power domain state
+ * @i915: i915 device instance
+ * @resume: Called from resume code paths or not
+ *
+ * This function initializes the hardware power domain state and enables all
+ * power wells belonging to the INIT power domain. Power wells in other
+ * domains (and not in the INIT domain) are referenced or disabled by
+ * intel_modeset_readout_hw_state(). After that the reference count of each
+ * power well must match its HW enabled state, see
+ * intel_power_domains_verify_state().
+ *
+ * It will return with power domains disabled (to be enabled later by
+ * intel_power_domains_enable()) and must be paired with
+ * intel_power_domains_fini_hw().
+ */
+void intel_power_domains_init_hw(struct drm_i915_private *i915, bool resume)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+
+	power_domains->initializing = true;
+
+	if (INTEL_GEN(i915) >= 11) {
+		icl_display_core_init(i915, resume);
+	} else if (IS_CANNONLAKE(i915)) {
+		cnl_display_core_init(i915, resume);
+	} else if (IS_GEN9_BC(i915)) {
+		skl_display_core_init(i915, resume);
+	} else if (IS_GEN9_LP(i915)) {
+		bxt_display_core_init(i915, resume);
+	} else if (IS_CHERRYVIEW(i915)) {
+		mutex_lock(&power_domains->lock);
+		chv_phy_control_init(i915);
+		mutex_unlock(&power_domains->lock);
+		assert_isp_power_gated(i915);
+	} else if (IS_VALLEYVIEW(i915)) {
+		mutex_lock(&power_domains->lock);
+		vlv_cmnlane_wa(i915);
+		mutex_unlock(&power_domains->lock);
+		assert_ved_power_gated(i915);
+		assert_isp_power_gated(i915);
+	} else if (IS_BROADWELL(i915) || IS_HASWELL(i915)) {
+		hsw_assert_cdclk(i915);
+		intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
+	} else if (IS_IVYBRIDGE(i915)) {
+		intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
+	}
+
+	/*
+	 * Keep all power wells enabled for any dependent HW access during
+	 * initialization and to make sure we keep BIOS enabled display HW
+	 * resources powered until display HW readout is complete. We drop
+	 * this reference in intel_power_domains_enable().
+	 */
+	power_domains->wakeref =
+		intel_display_power_get(i915, POWER_DOMAIN_INIT);
+
+	/* Disable power support if the user asked so. */
+	if (!i915_modparams.disable_power_well)
+		intel_display_power_get(i915, POWER_DOMAIN_INIT);
+	intel_power_domains_sync_hw(i915);
+
+	power_domains->initializing = false;
+}
+
+/**
+ * intel_power_domains_fini_hw - deinitialize hw power domain state
+ * @i915: i915 device instance
+ *
+ * De-initializes the display power domain HW state. It also ensures that the
+ * device stays powered up so that the driver can be reloaded.
+ *
+ * It must be called with power domains already disabled (after a call to
+ * intel_power_domains_disable()) and must be paired with
+ * intel_power_domains_init_hw().
+ */
+void intel_power_domains_fini_hw(struct drm_i915_private *i915)
+{
+	intel_wakeref_t wakeref __maybe_unused =
+		fetch_and_zero(&i915->power_domains.wakeref);
+
+	/* Remove the refcount we took to keep power well support disabled. */
+	if (!i915_modparams.disable_power_well)
+		intel_display_power_put_unchecked(i915, POWER_DOMAIN_INIT);
+
+	intel_display_power_flush_work_sync(i915);
+
+	intel_power_domains_verify_state(i915);
+
+	/* Keep the power well enabled, but cancel its rpm wakeref. */
+	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+}
+
+/**
+ * intel_power_domains_enable - enable toggling of display power wells
+ * @i915: i915 device instance
+ *
+ * Enable the ondemand enabling/disabling of the display power wells. Note that
+ * power wells not belonging to POWER_DOMAIN_INIT are allowed to be toggled
+ * only at specific points of the display modeset sequence, thus they are not
+ * affected by the intel_power_domains_enable()/disable() calls. The purpose
+ * of these function is to keep the rest of power wells enabled until the end
+ * of display HW readout (which will acquire the power references reflecting
+ * the current HW state).
+ */
+void intel_power_domains_enable(struct drm_i915_private *i915)
+{
+	intel_wakeref_t wakeref __maybe_unused =
+		fetch_and_zero(&i915->power_domains.wakeref);
+
+	intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
+	intel_power_domains_verify_state(i915);
+}
+
+/**
+ * intel_power_domains_disable - disable toggling of display power wells
+ * @i915: i915 device instance
+ *
+ * Disable the ondemand enabling/disabling of the display power wells. See
+ * intel_power_domains_enable() for which power wells this call controls.
+ */
+void intel_power_domains_disable(struct drm_i915_private *i915)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+
+	WARN_ON(power_domains->wakeref);
+	power_domains->wakeref =
+		intel_display_power_get(i915, POWER_DOMAIN_INIT);
+
+	intel_power_domains_verify_state(i915);
+}
+
+/**
+ * intel_power_domains_suspend - suspend power domain state
+ * @i915: i915 device instance
+ * @suspend_mode: specifies the target suspend state (idle, mem, hibernation)
+ *
+ * This function prepares the hardware power domain state before entering
+ * system suspend.
+ *
+ * It must be called with power domains already disabled (after a call to
+ * intel_power_domains_disable()) and paired with intel_power_domains_resume().
+ */
+void intel_power_domains_suspend(struct drm_i915_private *i915,
+				 enum i915_drm_suspend_mode suspend_mode)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+	intel_wakeref_t wakeref __maybe_unused =
+		fetch_and_zero(&power_domains->wakeref);
+
+	intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
+
+	/*
+	 * In case of suspend-to-idle (aka S0ix) on a DMC platform without DC9
+	 * support don't manually deinit the power domains. This also means the
+	 * CSR/DMC firmware will stay active, it will power down any HW
+	 * resources as required and also enable deeper system power states
+	 * that would be blocked if the firmware was inactive.
+	 */
+	if (!(i915->csr.allowed_dc_mask & DC_STATE_EN_DC9) &&
+	    suspend_mode == I915_DRM_SUSPEND_IDLE &&
+	    i915->csr.dmc_payload) {
+		intel_display_power_flush_work(i915);
+		intel_power_domains_verify_state(i915);
+		return;
+	}
+
+	/*
+	 * Even if power well support was disabled we still want to disable
+	 * power wells if power domains must be deinitialized for suspend.
+	 */
+	if (!i915_modparams.disable_power_well)
+		intel_display_power_put_unchecked(i915, POWER_DOMAIN_INIT);
+
+	intel_display_power_flush_work(i915);
+	intel_power_domains_verify_state(i915);
+
+	if (INTEL_GEN(i915) >= 11)
+		icl_display_core_uninit(i915);
+	else if (IS_CANNONLAKE(i915))
+		cnl_display_core_uninit(i915);
+	else if (IS_GEN9_BC(i915))
+		skl_display_core_uninit(i915);
+	else if (IS_GEN9_LP(i915))
+		bxt_display_core_uninit(i915);
+
+	power_domains->display_core_suspended = true;
+}
+
+/**
+ * intel_power_domains_resume - resume power domain state
+ * @i915: i915 device instance
+ *
+ * This function resume the hardware power domain state during system resume.
+ *
+ * It will return with power domain support disabled (to be enabled later by
+ * intel_power_domains_enable()) and must be paired with
+ * intel_power_domains_suspend().
+ */
+void intel_power_domains_resume(struct drm_i915_private *i915)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+
+	if (power_domains->display_core_suspended) {
+		intel_power_domains_init_hw(i915, true);
+		power_domains->display_core_suspended = false;
+	} else {
+		WARN_ON(power_domains->wakeref);
+		power_domains->wakeref =
+			intel_display_power_get(i915, POWER_DOMAIN_INIT);
+	}
+
+	intel_power_domains_verify_state(i915);
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+
+static void intel_power_domains_dump_info(struct drm_i915_private *i915)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+	struct i915_power_well *power_well;
+
+	for_each_power_well(i915, power_well) {
+		enum intel_display_power_domain domain;
+
+		DRM_DEBUG_DRIVER("%-25s %d\n",
+				 power_well->desc->name, power_well->count);
+
+		for_each_power_domain(domain, power_well->desc->domains)
+			DRM_DEBUG_DRIVER("  %-23s %d\n",
+					 intel_display_power_domain_str(domain),
+					 power_domains->domain_use_count[domain]);
+	}
+}
+
+/**
+ * intel_power_domains_verify_state - verify the HW/SW state for all power wells
+ * @i915: i915 device instance
+ *
+ * Verify if the reference count of each power well matches its HW enabled
+ * state and the total refcount of the domains it belongs to. This must be
+ * called after modeset HW state sanitization, which is responsible for
+ * acquiring reference counts for any power wells in use and disabling the
+ * ones left on by BIOS but not required by any active output.
+ */
+static void intel_power_domains_verify_state(struct drm_i915_private *i915)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+	struct i915_power_well *power_well;
+	bool dump_domain_info;
+
+	mutex_lock(&power_domains->lock);
+
+	verify_async_put_domains_state(power_domains);
+
+	dump_domain_info = false;
+	for_each_power_well(i915, power_well) {
+		enum intel_display_power_domain domain;
+		int domains_count;
+		bool enabled;
+
+		enabled = power_well->desc->ops->is_enabled(i915, power_well);
+		if ((power_well->count || power_well->desc->always_on) !=
+		    enabled)
+			DRM_ERROR("power well %s state mismatch (refcount %d/enabled %d)",
+				  power_well->desc->name,
+				  power_well->count, enabled);
+
+		domains_count = 0;
+		for_each_power_domain(domain, power_well->desc->domains)
+			domains_count += power_domains->domain_use_count[domain];
+
+		if (power_well->count != domains_count) {
+			DRM_ERROR("power well %s refcount/domain refcount mismatch "
+				  "(refcount %d/domains refcount %d)\n",
+				  power_well->desc->name, power_well->count,
+				  domains_count);
+			dump_domain_info = true;
+		}
+	}
+
+	if (dump_domain_info) {
+		static bool dumped;
+
+		if (!dumped) {
+			intel_power_domains_dump_info(i915);
+			dumped = true;
+		}
+	}
+
+	mutex_unlock(&power_domains->lock);
+}
+
+#else
+
+static void intel_power_domains_verify_state(struct drm_i915_private *i915)
+{
+}
+
+#endif
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h b/drivers/gpu/drm/i915/display/intel_display_power.h
new file mode 100644
index 000000000000..ff57b0a7fe59
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display_power.h
@@ -0,0 +1,288 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_DISPLAY_POWER_H__
+#define __INTEL_DISPLAY_POWER_H__
+
+#include "intel_display.h"
+#include "intel_runtime_pm.h"
+#include "i915_reg.h"
+
+struct drm_i915_private;
+struct intel_encoder;
+
+enum intel_display_power_domain {
+	POWER_DOMAIN_DISPLAY_CORE,
+	POWER_DOMAIN_PIPE_A,
+	POWER_DOMAIN_PIPE_B,
+	POWER_DOMAIN_PIPE_C,
+	POWER_DOMAIN_PIPE_A_PANEL_FITTER,
+	POWER_DOMAIN_PIPE_B_PANEL_FITTER,
+	POWER_DOMAIN_PIPE_C_PANEL_FITTER,
+	POWER_DOMAIN_TRANSCODER_A,
+	POWER_DOMAIN_TRANSCODER_B,
+	POWER_DOMAIN_TRANSCODER_C,
+	POWER_DOMAIN_TRANSCODER_EDP,
+	POWER_DOMAIN_TRANSCODER_EDP_VDSC,
+	POWER_DOMAIN_TRANSCODER_DSI_A,
+	POWER_DOMAIN_TRANSCODER_DSI_C,
+	POWER_DOMAIN_PORT_DDI_A_LANES,
+	POWER_DOMAIN_PORT_DDI_B_LANES,
+	POWER_DOMAIN_PORT_DDI_C_LANES,
+	POWER_DOMAIN_PORT_DDI_D_LANES,
+	POWER_DOMAIN_PORT_DDI_E_LANES,
+	POWER_DOMAIN_PORT_DDI_F_LANES,
+	POWER_DOMAIN_PORT_DDI_A_IO,
+	POWER_DOMAIN_PORT_DDI_B_IO,
+	POWER_DOMAIN_PORT_DDI_C_IO,
+	POWER_DOMAIN_PORT_DDI_D_IO,
+	POWER_DOMAIN_PORT_DDI_E_IO,
+	POWER_DOMAIN_PORT_DDI_F_IO,
+	POWER_DOMAIN_PORT_DSI,
+	POWER_DOMAIN_PORT_CRT,
+	POWER_DOMAIN_PORT_OTHER,
+	POWER_DOMAIN_VGA,
+	POWER_DOMAIN_AUDIO,
+	POWER_DOMAIN_AUX_A,
+	POWER_DOMAIN_AUX_B,
+	POWER_DOMAIN_AUX_C,
+	POWER_DOMAIN_AUX_D,
+	POWER_DOMAIN_AUX_E,
+	POWER_DOMAIN_AUX_F,
+	POWER_DOMAIN_AUX_IO_A,
+	POWER_DOMAIN_AUX_TBT1,
+	POWER_DOMAIN_AUX_TBT2,
+	POWER_DOMAIN_AUX_TBT3,
+	POWER_DOMAIN_AUX_TBT4,
+	POWER_DOMAIN_GMBUS,
+	POWER_DOMAIN_MODESET,
+	POWER_DOMAIN_GT_IRQ,
+	POWER_DOMAIN_INIT,
+
+	POWER_DOMAIN_NUM,
+};
+
+#define POWER_DOMAIN_PIPE(pipe) ((pipe) + POWER_DOMAIN_PIPE_A)
+#define POWER_DOMAIN_PIPE_PANEL_FITTER(pipe) \
+		((pipe) + POWER_DOMAIN_PIPE_A_PANEL_FITTER)
+#define POWER_DOMAIN_TRANSCODER(tran) \
+	((tran) == TRANSCODER_EDP ? POWER_DOMAIN_TRANSCODER_EDP : \
+	 (tran) + POWER_DOMAIN_TRANSCODER_A)
+
+struct i915_power_well;
+
+struct i915_power_well_ops {
+	/*
+	 * Synchronize the well's hw state to match the current sw state, for
+	 * example enable/disable it based on the current refcount. Called
+	 * during driver init and resume time, possibly after first calling
+	 * the enable/disable handlers.
+	 */
+	void (*sync_hw)(struct drm_i915_private *dev_priv,
+			struct i915_power_well *power_well);
+	/*
+	 * Enable the well and resources that depend on it (for example
+	 * interrupts located on the well). Called after the 0->1 refcount
+	 * transition.
+	 */
+	void (*enable)(struct drm_i915_private *dev_priv,
+		       struct i915_power_well *power_well);
+	/*
+	 * Disable the well and resources that depend on it. Called after
+	 * the 1->0 refcount transition.
+	 */
+	void (*disable)(struct drm_i915_private *dev_priv,
+			struct i915_power_well *power_well);
+	/* Returns the hw enabled state. */
+	bool (*is_enabled)(struct drm_i915_private *dev_priv,
+			   struct i915_power_well *power_well);
+};
+
+struct i915_power_well_regs {
+	i915_reg_t bios;
+	i915_reg_t driver;
+	i915_reg_t kvmr;
+	i915_reg_t debug;
+};
+
+/* Power well structure for haswell */
+struct i915_power_well_desc {
+	const char *name;
+	bool always_on;
+	u64 domains;
+	/* unique identifier for this power well */
+	enum i915_power_well_id id;
+	/*
+	 * Arbitraty data associated with this power well. Platform and power
+	 * well specific.
+	 */
+	union {
+		struct {
+			/*
+			 * request/status flag index in the PUNIT power well
+			 * control/status registers.
+			 */
+			u8 idx;
+		} vlv;
+		struct {
+			enum dpio_phy phy;
+		} bxt;
+		struct {
+			const struct i915_power_well_regs *regs;
+			/*
+			 * request/status flag index in the power well
+			 * constrol/status registers.
+			 */
+			u8 idx;
+			/* Mask of pipes whose IRQ logic is backed by the pw */
+			u8 irq_pipe_mask;
+			/* The pw is backing the VGA functionality */
+			bool has_vga:1;
+			bool has_fuses:1;
+			/*
+			 * The pw is for an ICL+ TypeC PHY port in
+			 * Thunderbolt mode.
+			 */
+			bool is_tc_tbt:1;
+		} hsw;
+	};
+	const struct i915_power_well_ops *ops;
+};
+
+struct i915_power_well {
+	const struct i915_power_well_desc *desc;
+	/* power well enable/disable usage count */
+	int count;
+	/* cached hw enabled state */
+	bool hw_enabled;
+};
+
+struct i915_power_domains {
+	/*
+	 * Power wells needed for initialization at driver init and suspend
+	 * time are on. They are kept on until after the first modeset.
+	 */
+	bool initializing;
+	bool display_core_suspended;
+	int power_well_count;
+
+	intel_wakeref_t wakeref;
+
+	struct mutex lock;
+	int domain_use_count[POWER_DOMAIN_NUM];
+
+	struct delayed_work async_put_work;
+	intel_wakeref_t async_put_wakeref;
+	u64 async_put_domains[2];
+
+	struct i915_power_well *power_wells;
+};
+
+#define for_each_power_domain(domain, mask)				\
+	for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++)	\
+		for_each_if(BIT_ULL(domain) & (mask))
+
+#define for_each_power_well(__dev_priv, __power_well)				\
+	for ((__power_well) = (__dev_priv)->power_domains.power_wells;	\
+	     (__power_well) - (__dev_priv)->power_domains.power_wells <	\
+		(__dev_priv)->power_domains.power_well_count;		\
+	     (__power_well)++)
+
+#define for_each_power_well_reverse(__dev_priv, __power_well)			\
+	for ((__power_well) = (__dev_priv)->power_domains.power_wells +		\
+			      (__dev_priv)->power_domains.power_well_count - 1;	\
+	     (__power_well) - (__dev_priv)->power_domains.power_wells >= 0;	\
+	     (__power_well)--)
+
+#define for_each_power_domain_well(__dev_priv, __power_well, __domain_mask)	\
+	for_each_power_well(__dev_priv, __power_well)				\
+		for_each_if((__power_well)->desc->domains & (__domain_mask))
+
+#define for_each_power_domain_well_reverse(__dev_priv, __power_well, __domain_mask) \
+	for_each_power_well_reverse(__dev_priv, __power_well)		        \
+		for_each_if((__power_well)->desc->domains & (__domain_mask))
+
+void skl_enable_dc6(struct drm_i915_private *dev_priv);
+void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv);
+void bxt_enable_dc9(struct drm_i915_private *dev_priv);
+void bxt_disable_dc9(struct drm_i915_private *dev_priv);
+void gen9_enable_dc5(struct drm_i915_private *dev_priv);
+
+int intel_power_domains_init(struct drm_i915_private *dev_priv);
+void intel_power_domains_cleanup(struct drm_i915_private *dev_priv);
+void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume);
+void intel_power_domains_fini_hw(struct drm_i915_private *dev_priv);
+void icl_display_core_init(struct drm_i915_private *dev_priv, bool resume);
+void icl_display_core_uninit(struct drm_i915_private *dev_priv);
+void intel_power_domains_enable(struct drm_i915_private *dev_priv);
+void intel_power_domains_disable(struct drm_i915_private *dev_priv);
+void intel_power_domains_suspend(struct drm_i915_private *dev_priv,
+				 enum i915_drm_suspend_mode);
+void intel_power_domains_resume(struct drm_i915_private *dev_priv);
+void hsw_enable_pc8(struct drm_i915_private *dev_priv);
+void hsw_disable_pc8(struct drm_i915_private *dev_priv);
+void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume);
+void bxt_display_core_uninit(struct drm_i915_private *dev_priv);
+
+const char *
+intel_display_power_domain_str(enum intel_display_power_domain domain);
+
+bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
+				    enum intel_display_power_domain domain);
+bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
+				      enum intel_display_power_domain domain);
+intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
+					enum intel_display_power_domain domain);
+intel_wakeref_t
+intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
+				   enum intel_display_power_domain domain);
+void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
+				       enum intel_display_power_domain domain);
+void __intel_display_power_put_async(struct drm_i915_private *i915,
+				     enum intel_display_power_domain domain,
+				     intel_wakeref_t wakeref);
+void intel_display_power_flush_work(struct drm_i915_private *i915);
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+void intel_display_power_put(struct drm_i915_private *dev_priv,
+			     enum intel_display_power_domain domain,
+			     intel_wakeref_t wakeref);
+static inline void
+intel_display_power_put_async(struct drm_i915_private *i915,
+			      enum intel_display_power_domain domain,
+			      intel_wakeref_t wakeref)
+{
+	__intel_display_power_put_async(i915, domain, wakeref);
+}
+#else
+static inline void
+intel_display_power_put(struct drm_i915_private *i915,
+			enum intel_display_power_domain domain,
+			intel_wakeref_t wakeref)
+{
+	intel_display_power_put_unchecked(i915, domain);
+}
+
+static inline void
+intel_display_power_put_async(struct drm_i915_private *i915,
+			      enum intel_display_power_domain domain,
+			      intel_wakeref_t wakeref)
+{
+	__intel_display_power_put_async(i915, domain, -1);
+}
+#endif
+
+#define with_intel_display_power(i915, domain, wf) \
+	for ((wf) = intel_display_power_get((i915), (domain)); (wf); \
+	     intel_display_power_put_async((i915), (domain), (wf)), (wf) = 0)
+
+void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
+			    u8 req_slices);
+
+void chv_phy_powergate_lanes(struct intel_encoder *encoder,
+			     bool override, unsigned int mask);
+bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
+			  enum dpio_channel ch, bool override);
+
+#endif /* __INTEL_DISPLAY_POWER_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dpio_phy.c b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
new file mode 100644
index 000000000000..7ccf7f3974db
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
@@ -0,0 +1,1088 @@
+/*
+ * Copyright © 2014-2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "display/intel_dp.h"
+
+#include "intel_dpio_phy.h"
+#include "intel_drv.h"
+#include "intel_sideband.h"
+
+/**
+ * DOC: DPIO
+ *
+ * VLV, CHV and BXT have slightly peculiar display PHYs for driving DP/HDMI
+ * ports. DPIO is the name given to such a display PHY. These PHYs
+ * don't follow the standard programming model using direct MMIO
+ * registers, and instead their registers must be accessed trough IOSF
+ * sideband. VLV has one such PHY for driving ports B and C, and CHV
+ * adds another PHY for driving port D. Each PHY responds to specific
+ * IOSF-SB port.
+ *
+ * Each display PHY is made up of one or two channels. Each channel
+ * houses a common lane part which contains the PLL and other common
+ * logic. CH0 common lane also contains the IOSF-SB logic for the
+ * Common Register Interface (CRI) ie. the DPIO registers. CRI clock
+ * must be running when any DPIO registers are accessed.
+ *
+ * In addition to having their own registers, the PHYs are also
+ * controlled through some dedicated signals from the display
+ * controller. These include PLL reference clock enable, PLL enable,
+ * and CRI clock selection, for example.
+ *
+ * Eeach channel also has two splines (also called data lanes), and
+ * each spline is made up of one Physical Access Coding Sub-Layer
+ * (PCS) block and two TX lanes. So each channel has two PCS blocks
+ * and four TX lanes. The TX lanes are used as DP lanes or TMDS
+ * data/clock pairs depending on the output type.
+ *
+ * Additionally the PHY also contains an AUX lane with AUX blocks
+ * for each channel. This is used for DP AUX communication, but
+ * this fact isn't really relevant for the driver since AUX is
+ * controlled from the display controller side. No DPIO registers
+ * need to be accessed during AUX communication,
+ *
+ * Generally on VLV/CHV the common lane corresponds to the pipe and
+ * the spline (PCS/TX) corresponds to the port.
+ *
+ * For dual channel PHY (VLV/CHV):
+ *
+ *  pipe A == CMN/PLL/REF CH0
+ *
+ *  pipe B == CMN/PLL/REF CH1
+ *
+ *  port B == PCS/TX CH0
+ *
+ *  port C == PCS/TX CH1
+ *
+ * This is especially important when we cross the streams
+ * ie. drive port B with pipe B, or port C with pipe A.
+ *
+ * For single channel PHY (CHV):
+ *
+ *  pipe C == CMN/PLL/REF CH0
+ *
+ *  port D == PCS/TX CH0
+ *
+ * On BXT the entire PHY channel corresponds to the port. That means
+ * the PLL is also now associated with the port rather than the pipe,
+ * and so the clock needs to be routed to the appropriate transcoder.
+ * Port A PLL is directly connected to transcoder EDP and port B/C
+ * PLLs can be routed to any transcoder A/B/C.
+ *
+ * Note: DDI0 is digital port B, DD1 is digital port C, and DDI2 is
+ * digital port D (CHV) or port A (BXT). ::
+ *
+ *
+ *     Dual channel PHY (VLV/CHV/BXT)
+ *     ---------------------------------
+ *     |      CH0      |      CH1      |
+ *     |  CMN/PLL/REF  |  CMN/PLL/REF  |
+ *     |---------------|---------------| Display PHY
+ *     | PCS01 | PCS23 | PCS01 | PCS23 |
+ *     |-------|-------|-------|-------|
+ *     |TX0|TX1|TX2|TX3|TX0|TX1|TX2|TX3|
+ *     ---------------------------------
+ *     |     DDI0      |     DDI1      | DP/HDMI ports
+ *     ---------------------------------
+ *
+ *     Single channel PHY (CHV/BXT)
+ *     -----------------
+ *     |      CH0      |
+ *     |  CMN/PLL/REF  |
+ *     |---------------| Display PHY
+ *     | PCS01 | PCS23 |
+ *     |-------|-------|
+ *     |TX0|TX1|TX2|TX3|
+ *     -----------------
+ *     |     DDI2      | DP/HDMI port
+ *     -----------------
+ */
+
+/**
+ * struct bxt_ddi_phy_info - Hold info for a broxton DDI phy
+ */
+struct bxt_ddi_phy_info {
+	/**
+	 * @dual_channel: true if this phy has a second channel.
+	 */
+	bool dual_channel;
+
+	/**
+	 * @rcomp_phy: If -1, indicates this phy has its own rcomp resistor.
+	 * Otherwise the GRC value will be copied from the phy indicated by
+	 * this field.
+	 */
+	enum dpio_phy rcomp_phy;
+
+	/**
+	 * @reset_delay: delay in us to wait before setting the common reset
+	 * bit in BXT_PHY_CTL_FAMILY, which effectively enables the phy.
+	 */
+	int reset_delay;
+
+	/**
+	 * @pwron_mask: Mask with the appropriate bit set that would cause the
+	 * punit to power this phy if written to BXT_P_CR_GT_DISP_PWRON.
+	 */
+	u32 pwron_mask;
+
+	/**
+	 * @channel: struct containing per channel information.
+	 */
+	struct {
+		/**
+		 * @channel.port: which port maps to this channel.
+		 */
+		enum port port;
+	} channel[2];
+};
+
+static const struct bxt_ddi_phy_info bxt_ddi_phy_info[] = {
+	[DPIO_PHY0] = {
+		.dual_channel = true,
+		.rcomp_phy = DPIO_PHY1,
+		.pwron_mask = BIT(0),
+
+		.channel = {
+			[DPIO_CH0] = { .port = PORT_B },
+			[DPIO_CH1] = { .port = PORT_C },
+		}
+	},
+	[DPIO_PHY1] = {
+		.dual_channel = false,
+		.rcomp_phy = -1,
+		.pwron_mask = BIT(1),
+
+		.channel = {
+			[DPIO_CH0] = { .port = PORT_A },
+		}
+	},
+};
+
+static const struct bxt_ddi_phy_info glk_ddi_phy_info[] = {
+	[DPIO_PHY0] = {
+		.dual_channel = false,
+		.rcomp_phy = DPIO_PHY1,
+		.pwron_mask = BIT(0),
+		.reset_delay = 20,
+
+		.channel = {
+			[DPIO_CH0] = { .port = PORT_B },
+		}
+	},
+	[DPIO_PHY1] = {
+		.dual_channel = false,
+		.rcomp_phy = -1,
+		.pwron_mask = BIT(3),
+		.reset_delay = 20,
+
+		.channel = {
+			[DPIO_CH0] = { .port = PORT_A },
+		}
+	},
+	[DPIO_PHY2] = {
+		.dual_channel = false,
+		.rcomp_phy = DPIO_PHY1,
+		.pwron_mask = BIT(1),
+		.reset_delay = 20,
+
+		.channel = {
+			[DPIO_CH0] = { .port = PORT_C },
+		}
+	},
+};
+
+static const struct bxt_ddi_phy_info *
+bxt_get_phy_list(struct drm_i915_private *dev_priv, int *count)
+{
+	if (IS_GEMINILAKE(dev_priv)) {
+		*count =  ARRAY_SIZE(glk_ddi_phy_info);
+		return glk_ddi_phy_info;
+	} else {
+		*count =  ARRAY_SIZE(bxt_ddi_phy_info);
+		return bxt_ddi_phy_info;
+	}
+}
+
+static const struct bxt_ddi_phy_info *
+bxt_get_phy_info(struct drm_i915_private *dev_priv, enum dpio_phy phy)
+{
+	int count;
+	const struct bxt_ddi_phy_info *phy_list =
+		bxt_get_phy_list(dev_priv, &count);
+
+	return &phy_list[phy];
+}
+
+void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
+			     enum dpio_phy *phy, enum dpio_channel *ch)
+{
+	const struct bxt_ddi_phy_info *phy_info, *phys;
+	int i, count;
+
+	phys = bxt_get_phy_list(dev_priv, &count);
+
+	for (i = 0; i < count; i++) {
+		phy_info = &phys[i];
+
+		if (port == phy_info->channel[DPIO_CH0].port) {
+			*phy = i;
+			*ch = DPIO_CH0;
+			return;
+		}
+
+		if (phy_info->dual_channel &&
+		    port == phy_info->channel[DPIO_CH1].port) {
+			*phy = i;
+			*ch = DPIO_CH1;
+			return;
+		}
+	}
+
+	WARN(1, "PHY not found for PORT %c", port_name(port));
+	*phy = DPIO_PHY0;
+	*ch = DPIO_CH0;
+}
+
+void bxt_ddi_phy_set_signal_level(struct drm_i915_private *dev_priv,
+				  enum port port, u32 margin, u32 scale,
+				  u32 enable, u32 deemphasis)
+{
+	u32 val;
+	enum dpio_phy phy;
+	enum dpio_channel ch;
+
+	bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
+
+	/*
+	 * While we write to the group register to program all lanes at once we
+	 * can read only lane registers and we pick lanes 0/1 for that.
+	 */
+	val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
+	val &= ~(TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT);
+	I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
+
+	val = I915_READ(BXT_PORT_TX_DW2_LN0(phy, ch));
+	val &= ~(MARGIN_000 | UNIQ_TRANS_SCALE);
+	val |= margin << MARGIN_000_SHIFT | scale << UNIQ_TRANS_SCALE_SHIFT;
+	I915_WRITE(BXT_PORT_TX_DW2_GRP(phy, ch), val);
+
+	val = I915_READ(BXT_PORT_TX_DW3_LN0(phy, ch));
+	val &= ~SCALE_DCOMP_METHOD;
+	if (enable)
+		val |= SCALE_DCOMP_METHOD;
+
+	if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD))
+		DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set");
+
+	I915_WRITE(BXT_PORT_TX_DW3_GRP(phy, ch), val);
+
+	val = I915_READ(BXT_PORT_TX_DW4_LN0(phy, ch));
+	val &= ~DE_EMPHASIS;
+	val |= deemphasis << DEEMPH_SHIFT;
+	I915_WRITE(BXT_PORT_TX_DW4_GRP(phy, ch), val);
+
+	val = I915_READ(BXT_PORT_PCS_DW10_LN01(phy, ch));
+	val |= TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT;
+	I915_WRITE(BXT_PORT_PCS_DW10_GRP(phy, ch), val);
+}
+
+bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
+			    enum dpio_phy phy)
+{
+	const struct bxt_ddi_phy_info *phy_info;
+
+	phy_info = bxt_get_phy_info(dev_priv, phy);
+
+	if (!(I915_READ(BXT_P_CR_GT_DISP_PWRON) & phy_info->pwron_mask))
+		return false;
+
+	if ((I915_READ(BXT_PORT_CL1CM_DW0(phy)) &
+	     (PHY_POWER_GOOD | PHY_RESERVED)) != PHY_POWER_GOOD) {
+		DRM_DEBUG_DRIVER("DDI PHY %d powered, but power hasn't settled\n",
+				 phy);
+
+		return false;
+	}
+
+	if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) {
+		DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n",
+				 phy);
+
+		return false;
+	}
+
+	return true;
+}
+
+static u32 bxt_get_grc(struct drm_i915_private *dev_priv, enum dpio_phy phy)
+{
+	u32 val = I915_READ(BXT_PORT_REF_DW6(phy));
+
+	return (val & GRC_CODE_MASK) >> GRC_CODE_SHIFT;
+}
+
+static void bxt_phy_wait_grc_done(struct drm_i915_private *dev_priv,
+				  enum dpio_phy phy)
+{
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    BXT_PORT_REF_DW3(phy),
+				    GRC_DONE, GRC_DONE,
+				    10))
+		DRM_ERROR("timeout waiting for PHY%d GRC\n", phy);
+}
+
+static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv,
+			      enum dpio_phy phy)
+{
+	const struct bxt_ddi_phy_info *phy_info;
+	u32 val;
+
+	phy_info = bxt_get_phy_info(dev_priv, phy);
+
+	if (bxt_ddi_phy_is_enabled(dev_priv, phy)) {
+		/* Still read out the GRC value for state verification */
+		if (phy_info->rcomp_phy != -1)
+			dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy);
+
+		if (bxt_ddi_phy_verify_state(dev_priv, phy)) {
+			DRM_DEBUG_DRIVER("DDI PHY %d already enabled, "
+					 "won't reprogram it\n", phy);
+			return;
+		}
+
+		DRM_DEBUG_DRIVER("DDI PHY %d enabled with invalid state, "
+				 "force reprogramming it\n", phy);
+	}
+
+	val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
+	val |= phy_info->pwron_mask;
+	I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
+
+	/*
+	 * The PHY registers start out inaccessible and respond to reads with
+	 * all 1s.  Eventually they become accessible as they power up, then
+	 * the reserved bit will give the default 0.  Poll on the reserved bit
+	 * becoming 0 to find when the PHY is accessible.
+	 * The flag should get set in 100us according to the HW team, but
+	 * use 1ms due to occasional timeouts observed with that.
+	 */
+	if (intel_wait_for_register_fw(&dev_priv->uncore,
+				       BXT_PORT_CL1CM_DW0(phy),
+				       PHY_RESERVED | PHY_POWER_GOOD,
+				       PHY_POWER_GOOD,
+				       1))
+		DRM_ERROR("timeout during PHY%d power on\n", phy);
+
+	/* Program PLL Rcomp code offset */
+	val = I915_READ(BXT_PORT_CL1CM_DW9(phy));
+	val &= ~IREF0RC_OFFSET_MASK;
+	val |= 0xE4 << IREF0RC_OFFSET_SHIFT;
+	I915_WRITE(BXT_PORT_CL1CM_DW9(phy), val);
+
+	val = I915_READ(BXT_PORT_CL1CM_DW10(phy));
+	val &= ~IREF1RC_OFFSET_MASK;
+	val |= 0xE4 << IREF1RC_OFFSET_SHIFT;
+	I915_WRITE(BXT_PORT_CL1CM_DW10(phy), val);
+
+	/* Program power gating */
+	val = I915_READ(BXT_PORT_CL1CM_DW28(phy));
+	val |= OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN |
+		SUS_CLK_CONFIG;
+	I915_WRITE(BXT_PORT_CL1CM_DW28(phy), val);
+
+	if (phy_info->dual_channel) {
+		val = I915_READ(BXT_PORT_CL2CM_DW6(phy));
+		val |= DW6_OLDO_DYN_PWR_DOWN_EN;
+		I915_WRITE(BXT_PORT_CL2CM_DW6(phy), val);
+	}
+
+	if (phy_info->rcomp_phy != -1) {
+		u32 grc_code;
+
+		bxt_phy_wait_grc_done(dev_priv, phy_info->rcomp_phy);
+
+		/*
+		 * PHY0 isn't connected to an RCOMP resistor so copy over
+		 * the corresponding calibrated value from PHY1, and disable
+		 * the automatic calibration on PHY0.
+		 */
+		val = dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv,
+							  phy_info->rcomp_phy);
+		grc_code = val << GRC_CODE_FAST_SHIFT |
+			   val << GRC_CODE_SLOW_SHIFT |
+			   val;
+		I915_WRITE(BXT_PORT_REF_DW6(phy), grc_code);
+
+		val = I915_READ(BXT_PORT_REF_DW8(phy));
+		val |= GRC_DIS | GRC_RDY_OVRD;
+		I915_WRITE(BXT_PORT_REF_DW8(phy), val);
+	}
+
+	if (phy_info->reset_delay)
+		udelay(phy_info->reset_delay);
+
+	val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
+	val |= COMMON_RESET_DIS;
+	I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
+}
+
+void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy)
+{
+	const struct bxt_ddi_phy_info *phy_info;
+	u32 val;
+
+	phy_info = bxt_get_phy_info(dev_priv, phy);
+
+	val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
+	val &= ~COMMON_RESET_DIS;
+	I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
+
+	val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
+	val &= ~phy_info->pwron_mask;
+	I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
+}
+
+void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy)
+{
+	const struct bxt_ddi_phy_info *phy_info =
+		bxt_get_phy_info(dev_priv, phy);
+	enum dpio_phy rcomp_phy = phy_info->rcomp_phy;
+	bool was_enabled;
+
+	lockdep_assert_held(&dev_priv->power_domains.lock);
+
+	was_enabled = true;
+	if (rcomp_phy != -1)
+		was_enabled = bxt_ddi_phy_is_enabled(dev_priv, rcomp_phy);
+
+	/*
+	 * We need to copy the GRC calibration value from rcomp_phy,
+	 * so make sure it's powered up.
+	 */
+	if (!was_enabled)
+		_bxt_ddi_phy_init(dev_priv, rcomp_phy);
+
+	_bxt_ddi_phy_init(dev_priv, phy);
+
+	if (!was_enabled)
+		bxt_ddi_phy_uninit(dev_priv, rcomp_phy);
+}
+
+static bool __printf(6, 7)
+__phy_reg_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy,
+		       i915_reg_t reg, u32 mask, u32 expected,
+		       const char *reg_fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+	u32 val;
+
+	val = I915_READ(reg);
+	if ((val & mask) == expected)
+		return true;
+
+	va_start(args, reg_fmt);
+	vaf.fmt = reg_fmt;
+	vaf.va = &args;
+
+	DRM_DEBUG_DRIVER("DDI PHY %d reg %pV [%08x] state mismatch: "
+			 "current %08x, expected %08x (mask %08x)\n",
+			 phy, &vaf, reg.reg, val, (val & ~mask) | expected,
+			 mask);
+
+	va_end(args);
+
+	return false;
+}
+
+bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv,
+			      enum dpio_phy phy)
+{
+	const struct bxt_ddi_phy_info *phy_info;
+	u32 mask;
+	bool ok;
+
+	phy_info = bxt_get_phy_info(dev_priv, phy);
+
+#define _CHK(reg, mask, exp, fmt, ...)					\
+	__phy_reg_verify_state(dev_priv, phy, reg, mask, exp, fmt,	\
+			       ## __VA_ARGS__)
+
+	if (!bxt_ddi_phy_is_enabled(dev_priv, phy))
+		return false;
+
+	ok = true;
+
+	/* PLL Rcomp code offset */
+	ok &= _CHK(BXT_PORT_CL1CM_DW9(phy),
+		    IREF0RC_OFFSET_MASK, 0xe4 << IREF0RC_OFFSET_SHIFT,
+		    "BXT_PORT_CL1CM_DW9(%d)", phy);
+	ok &= _CHK(BXT_PORT_CL1CM_DW10(phy),
+		    IREF1RC_OFFSET_MASK, 0xe4 << IREF1RC_OFFSET_SHIFT,
+		    "BXT_PORT_CL1CM_DW10(%d)", phy);
+
+	/* Power gating */
+	mask = OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG;
+	ok &= _CHK(BXT_PORT_CL1CM_DW28(phy), mask, mask,
+		    "BXT_PORT_CL1CM_DW28(%d)", phy);
+
+	if (phy_info->dual_channel)
+		ok &= _CHK(BXT_PORT_CL2CM_DW6(phy),
+			   DW6_OLDO_DYN_PWR_DOWN_EN, DW6_OLDO_DYN_PWR_DOWN_EN,
+			   "BXT_PORT_CL2CM_DW6(%d)", phy);
+
+	if (phy_info->rcomp_phy != -1) {
+		u32 grc_code = dev_priv->bxt_phy_grc;
+
+		grc_code = grc_code << GRC_CODE_FAST_SHIFT |
+			   grc_code << GRC_CODE_SLOW_SHIFT |
+			   grc_code;
+		mask = GRC_CODE_FAST_MASK | GRC_CODE_SLOW_MASK |
+		       GRC_CODE_NOM_MASK;
+		ok &= _CHK(BXT_PORT_REF_DW6(phy), mask, grc_code,
+			   "BXT_PORT_REF_DW6(%d)", phy);
+
+		mask = GRC_DIS | GRC_RDY_OVRD;
+		ok &= _CHK(BXT_PORT_REF_DW8(phy), mask, mask,
+			    "BXT_PORT_REF_DW8(%d)", phy);
+	}
+
+	return ok;
+#undef _CHK
+}
+
+u8
+bxt_ddi_phy_calc_lane_lat_optim_mask(u8 lane_count)
+{
+	switch (lane_count) {
+	case 1:
+		return 0;
+	case 2:
+		return BIT(2) | BIT(0);
+	case 4:
+		return BIT(3) | BIT(2) | BIT(0);
+	default:
+		MISSING_CASE(lane_count);
+
+		return 0;
+	}
+}
+
+void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
+				     u8 lane_lat_optim_mask)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
+	enum dpio_phy phy;
+	enum dpio_channel ch;
+	int lane;
+
+	bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
+
+	for (lane = 0; lane < 4; lane++) {
+		u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
+
+		/*
+		 * Note that on CHV this flag is called UPAR, but has
+		 * the same function.
+		 */
+		val &= ~LATENCY_OPTIM;
+		if (lane_lat_optim_mask & BIT(lane))
+			val |= LATENCY_OPTIM;
+
+		I915_WRITE(BXT_PORT_TX_DW14_LN(phy, ch, lane), val);
+	}
+}
+
+u8
+bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum port port = encoder->port;
+	enum dpio_phy phy;
+	enum dpio_channel ch;
+	int lane;
+	u8 mask;
+
+	bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
+
+	mask = 0;
+	for (lane = 0; lane < 4; lane++) {
+		u32 val = I915_READ(BXT_PORT_TX_DW14_LN(phy, ch, lane));
+
+		if (val & LATENCY_OPTIM)
+			mask |= BIT(lane);
+	}
+
+	return mask;
+}
+
+
+void chv_set_phy_signal_level(struct intel_encoder *encoder,
+			      u32 deemph_reg_value, u32 margin_reg_value,
+			      bool uniq_trans_scale)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+	enum dpio_channel ch = vlv_dport_to_channel(dport);
+	enum pipe pipe = intel_crtc->pipe;
+	u32 val;
+	int i;
+
+	vlv_dpio_get(dev_priv);
+
+	/* Clear calc init */
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
+	val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
+	val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
+	val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
+
+	if (intel_crtc->config->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
+		val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
+		val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
+		val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
+	}
+
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
+	val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
+	val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
+
+	if (intel_crtc->config->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
+		val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
+		val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
+	}
+
+	/* Program swing deemph */
+	for (i = 0; i < intel_crtc->config->lane_count; i++) {
+		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
+		val &= ~DPIO_SWING_DEEMPH9P5_MASK;
+		val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
+		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
+	}
+
+	/* Program swing margin */
+	for (i = 0; i < intel_crtc->config->lane_count; i++) {
+		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
+
+		val &= ~DPIO_SWING_MARGIN000_MASK;
+		val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
+
+		/*
+		 * Supposedly this value shouldn't matter when unique transition
+		 * scale is disabled, but in fact it does matter. Let's just
+		 * always program the same value and hope it's OK.
+		 */
+		val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
+		val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;
+
+		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
+	}
+
+	/*
+	 * The document said it needs to set bit 27 for ch0 and bit 26
+	 * for ch1. Might be a typo in the doc.
+	 * For now, for this unique transition scale selection, set bit
+	 * 27 for ch0 and ch1.
+	 */
+	for (i = 0; i < intel_crtc->config->lane_count; i++) {
+		val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
+		if (uniq_trans_scale)
+			val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
+		else
+			val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
+		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
+	}
+
+	/* Start swing calculation */
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
+	val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
+
+	if (intel_crtc->config->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
+		val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
+	}
+
+	vlv_dpio_put(dev_priv);
+}
+
+void chv_data_lane_soft_reset(struct intel_encoder *encoder,
+			      const struct intel_crtc_state *crtc_state,
+			      bool reset)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	enum pipe pipe = crtc->pipe;
+	u32 val;
+
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
+	if (reset)
+		val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
+	else
+		val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
+
+	if (crtc_state->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
+		if (reset)
+			val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
+		else
+			val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
+	}
+
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
+	val |= CHV_PCS_REQ_SOFTRESET_EN;
+	if (reset)
+		val &= ~DPIO_PCS_CLK_SOFT_RESET;
+	else
+		val |= DPIO_PCS_CLK_SOFT_RESET;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
+
+	if (crtc_state->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
+		val |= CHV_PCS_REQ_SOFTRESET_EN;
+		if (reset)
+			val &= ~DPIO_PCS_CLK_SOFT_RESET;
+		else
+			val |= DPIO_PCS_CLK_SOFT_RESET;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
+	}
+}
+
+void chv_phy_pre_pll_enable(struct intel_encoder *encoder,
+			    const struct intel_crtc_state *crtc_state)
+{
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	enum dpio_channel ch = vlv_dport_to_channel(dport);
+	enum pipe pipe = crtc->pipe;
+	unsigned int lane_mask =
+		intel_dp_unused_lane_mask(crtc_state->lane_count);
+	u32 val;
+
+	/*
+	 * Must trick the second common lane into life.
+	 * Otherwise we can't even access the PLL.
+	 */
+	if (ch == DPIO_CH0 && pipe == PIPE_B)
+		dport->release_cl2_override =
+			!chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true);
+
+	chv_phy_powergate_lanes(encoder, true, lane_mask);
+
+	vlv_dpio_get(dev_priv);
+
+	/* Assert data lane reset */
+	chv_data_lane_soft_reset(encoder, crtc_state, true);
+
+	/* program left/right clock distribution */
+	if (pipe != PIPE_B) {
+		val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
+		val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
+		if (ch == DPIO_CH0)
+			val |= CHV_BUFLEFTENA1_FORCE;
+		if (ch == DPIO_CH1)
+			val |= CHV_BUFRIGHTENA1_FORCE;
+		vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
+	} else {
+		val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
+		val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
+		if (ch == DPIO_CH0)
+			val |= CHV_BUFLEFTENA2_FORCE;
+		if (ch == DPIO_CH1)
+			val |= CHV_BUFRIGHTENA2_FORCE;
+		vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
+	}
+
+	/* program clock channel usage */
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
+	val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
+	if (pipe != PIPE_B)
+		val &= ~CHV_PCS_USEDCLKCHANNEL;
+	else
+		val |= CHV_PCS_USEDCLKCHANNEL;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
+
+	if (crtc_state->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
+		val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
+		if (pipe != PIPE_B)
+			val &= ~CHV_PCS_USEDCLKCHANNEL;
+		else
+			val |= CHV_PCS_USEDCLKCHANNEL;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
+	}
+
+	/*
+	 * This a a bit weird since generally CL
+	 * matches the pipe, but here we need to
+	 * pick the CL based on the port.
+	 */
+	val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
+	if (pipe != PIPE_B)
+		val &= ~CHV_CMN_USEDCLKCHANNEL;
+	else
+		val |= CHV_CMN_USEDCLKCHANNEL;
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
+
+	vlv_dpio_put(dev_priv);
+}
+
+void chv_phy_pre_encoder_enable(struct intel_encoder *encoder,
+				const struct intel_crtc_state *crtc_state)
+{
+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	enum dpio_channel ch = vlv_dport_to_channel(dport);
+	enum pipe pipe = crtc->pipe;
+	int data, i, stagger;
+	u32 val;
+
+	vlv_dpio_get(dev_priv);
+
+	/* allow hardware to manage TX FIFO reset source */
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
+	val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
+
+	if (crtc_state->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
+		val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
+	}
+
+	/* Program Tx lane latency optimal setting*/
+	for (i = 0; i < crtc_state->lane_count; i++) {
+		/* Set the upar bit */
+		if (crtc_state->lane_count == 1)
+			data = 0x0;
+		else
+			data = (i == 1) ? 0x0 : 0x1;
+		vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
+				data << DPIO_UPAR_SHIFT);
+	}
+
+	/* Data lane stagger programming */
+	if (crtc_state->port_clock > 270000)
+		stagger = 0x18;
+	else if (crtc_state->port_clock > 135000)
+		stagger = 0xd;
+	else if (crtc_state->port_clock > 67500)
+		stagger = 0x7;
+	else if (crtc_state->port_clock > 33750)
+		stagger = 0x4;
+	else
+		stagger = 0x2;
+
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
+	val |= DPIO_TX2_STAGGER_MASK(0x1f);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
+
+	if (crtc_state->lane_count > 2) {
+		val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
+		val |= DPIO_TX2_STAGGER_MASK(0x1f);
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
+	}
+
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
+		       DPIO_LANESTAGGER_STRAP(stagger) |
+		       DPIO_LANESTAGGER_STRAP_OVRD |
+		       DPIO_TX1_STAGGER_MASK(0x1f) |
+		       DPIO_TX1_STAGGER_MULT(6) |
+		       DPIO_TX2_STAGGER_MULT(0));
+
+	if (crtc_state->lane_count > 2) {
+		vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
+			       DPIO_LANESTAGGER_STRAP(stagger) |
+			       DPIO_LANESTAGGER_STRAP_OVRD |
+			       DPIO_TX1_STAGGER_MASK(0x1f) |
+			       DPIO_TX1_STAGGER_MULT(7) |
+			       DPIO_TX2_STAGGER_MULT(5));
+	}
+
+	/* Deassert data lane reset */
+	chv_data_lane_soft_reset(encoder, crtc_state, false);
+
+	vlv_dpio_put(dev_priv);
+}
+
+void chv_phy_release_cl2_override(struct intel_encoder *encoder)
+{
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	if (dport->release_cl2_override) {
+		chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
+		dport->release_cl2_override = false;
+	}
+}
+
+void chv_phy_post_pll_disable(struct intel_encoder *encoder,
+			      const struct intel_crtc_state *old_crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum pipe pipe = to_intel_crtc(old_crtc_state->base.crtc)->pipe;
+	u32 val;
+
+	vlv_dpio_get(dev_priv);
+
+	/* disable left/right clock distribution */
+	if (pipe != PIPE_B) {
+		val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
+		val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
+		vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
+	} else {
+		val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
+		val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
+		vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
+	}
+
+	vlv_dpio_put(dev_priv);
+
+	/*
+	 * Leave the power down bit cleared for at least one
+	 * lane so that chv_powergate_phy_ch() will power
+	 * on something when the channel is otherwise unused.
+	 * When the port is off and the override is removed
+	 * the lanes power down anyway, so otherwise it doesn't
+	 * really matter what the state of power down bits is
+	 * after this.
+	 */
+	chv_phy_powergate_lanes(encoder, false, 0x0);
+}
+
+void vlv_set_phy_signal_level(struct intel_encoder *encoder,
+			      u32 demph_reg_value, u32 preemph_reg_value,
+			      u32 uniqtranscale_reg_value, u32 tx3_demph)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	enum dpio_channel port = vlv_dport_to_channel(dport);
+	enum pipe pipe = intel_crtc->pipe;
+
+	vlv_dpio_get(dev_priv);
+
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
+			 uniqtranscale_reg_value);
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040);
+
+	if (tx3_demph)
+		vlv_dpio_write(dev_priv, pipe, VLV_TX3_DW4(port), tx3_demph);
+
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN);
+
+	vlv_dpio_put(dev_priv);
+}
+
+void vlv_phy_pre_pll_enable(struct intel_encoder *encoder,
+			    const struct intel_crtc_state *crtc_state)
+{
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	enum dpio_channel port = vlv_dport_to_channel(dport);
+	enum pipe pipe = crtc->pipe;
+
+	/* Program Tx lane resets to default */
+	vlv_dpio_get(dev_priv);
+
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
+			 DPIO_PCS_TX_LANE2_RESET |
+			 DPIO_PCS_TX_LANE1_RESET);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port),
+			 DPIO_PCS_CLK_CRI_RXEB_EIOS_EN |
+			 DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN |
+			 (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) |
+				 DPIO_PCS_CLK_SOFT_RESET);
+
+	/* Fix up inter-pair skew failure */
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
+	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
+
+	vlv_dpio_put(dev_priv);
+}
+
+void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
+				const struct intel_crtc_state *crtc_state)
+{
+	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+	struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	enum dpio_channel port = vlv_dport_to_channel(dport);
+	enum pipe pipe = crtc->pipe;
+	u32 val;
+
+	vlv_dpio_get(dev_priv);
+
+	/* Enable clock channels for this port */
+	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
+	val = 0;
+	if (pipe)
+		val |= (1<<21);
+	else
+		val &= ~(1<<21);
+	val |= 0x001000c4;
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
+
+	/* Program lane clock */
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
+
+	vlv_dpio_put(dev_priv);
+}
+
+void vlv_phy_reset_lanes(struct intel_encoder *encoder,
+			 const struct intel_crtc_state *old_crtc_state)
+{
+	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
+	enum dpio_channel port = vlv_dport_to_channel(dport);
+	enum pipe pipe = crtc->pipe;
+
+	vlv_dpio_get(dev_priv);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port), 0x00000000);
+	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port), 0x00e00060);
+	vlv_dpio_put(dev_priv);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_dpio_phy.h b/drivers/gpu/drm/i915/display/intel_dpio_phy.h
new file mode 100644
index 000000000000..f418aab90b7e
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dpio_phy.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_DPIO_PHY_H__
+#define __INTEL_DPIO_PHY_H__
+
+#include <linux/types.h>
+
+enum dpio_channel;
+enum dpio_phy;
+enum port;
+struct drm_i915_private;
+struct intel_crtc_state;
+struct intel_encoder;
+
+void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
+			     enum dpio_phy *phy, enum dpio_channel *ch);
+void bxt_ddi_phy_set_signal_level(struct drm_i915_private *dev_priv,
+				  enum port port, u32 margin, u32 scale,
+				  u32 enable, u32 deemphasis);
+void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy);
+void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy);
+bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
+			    enum dpio_phy phy);
+bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv,
+			      enum dpio_phy phy);
+u8 bxt_ddi_phy_calc_lane_lat_optim_mask(u8 lane_count);
+void bxt_ddi_phy_set_lane_optim_mask(struct intel_encoder *encoder,
+				     u8 lane_lat_optim_mask);
+u8 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder);
+
+void chv_set_phy_signal_level(struct intel_encoder *encoder,
+			      u32 deemph_reg_value, u32 margin_reg_value,
+			      bool uniq_trans_scale);
+void chv_data_lane_soft_reset(struct intel_encoder *encoder,
+			      const struct intel_crtc_state *crtc_state,
+			      bool reset);
+void chv_phy_pre_pll_enable(struct intel_encoder *encoder,
+			    const struct intel_crtc_state *crtc_state);
+void chv_phy_pre_encoder_enable(struct intel_encoder *encoder,
+				const struct intel_crtc_state *crtc_state);
+void chv_phy_release_cl2_override(struct intel_encoder *encoder);
+void chv_phy_post_pll_disable(struct intel_encoder *encoder,
+			      const struct intel_crtc_state *old_crtc_state);
+
+void vlv_set_phy_signal_level(struct intel_encoder *encoder,
+			      u32 demph_reg_value, u32 preemph_reg_value,
+			      u32 uniqtranscale_reg_value, u32 tx3_demph);
+void vlv_phy_pre_pll_enable(struct intel_encoder *encoder,
+			    const struct intel_crtc_state *crtc_state);
+void vlv_phy_pre_encoder_enable(struct intel_encoder *encoder,
+				const struct intel_crtc_state *crtc_state);
+void vlv_phy_reset_lanes(struct intel_encoder *encoder,
+			 const struct intel_crtc_state *old_crtc_state);
+
+#endif /* __INTEL_DPIO_PHY_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
new file mode 100644
index 000000000000..2d4e7b9a7b9d
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -0,0 +1,3359 @@
+/*
+ * Copyright © 2006-2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "intel_dpio_phy.h"
+#include "intel_dpll_mgr.h"
+#include "intel_drv.h"
+
+/**
+ * DOC: Display PLLs
+ *
+ * Display PLLs used for driving outputs vary by platform. While some have
+ * per-pipe or per-encoder dedicated PLLs, others allow the use of any PLL
+ * from a pool. In the latter scenario, it is possible that multiple pipes
+ * share a PLL if their configurations match.
+ *
+ * This file provides an abstraction over display PLLs. The function
+ * intel_shared_dpll_init() initializes the PLLs for the given platform.  The
+ * users of a PLL are tracked and that tracking is integrated with the atomic
+ * modest interface. During an atomic operation, a PLL can be requested for a
+ * given CRTC and encoder configuration by calling intel_get_shared_dpll() and
+ * a previously used PLL can be released with intel_release_shared_dpll().
+ * Changes to the users are first staged in the atomic state, and then made
+ * effective by calling intel_shared_dpll_swap_state() during the atomic
+ * commit phase.
+ */
+
+static void
+intel_atomic_duplicate_dpll_state(struct drm_i915_private *dev_priv,
+				  struct intel_shared_dpll_state *shared_dpll)
+{
+	enum intel_dpll_id i;
+
+	/* Copy shared dpll state */
+	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+		struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
+
+		shared_dpll[i] = pll->state;
+	}
+}
+
+static struct intel_shared_dpll_state *
+intel_atomic_get_shared_dpll_state(struct drm_atomic_state *s)
+{
+	struct intel_atomic_state *state = to_intel_atomic_state(s);
+
+	WARN_ON(!drm_modeset_is_locked(&s->dev->mode_config.connection_mutex));
+
+	if (!state->dpll_set) {
+		state->dpll_set = true;
+
+		intel_atomic_duplicate_dpll_state(to_i915(s->dev),
+						  state->shared_dpll);
+	}
+
+	return state->shared_dpll;
+}
+
+/**
+ * intel_get_shared_dpll_by_id - get a DPLL given its id
+ * @dev_priv: i915 device instance
+ * @id: pll id
+ *
+ * Returns:
+ * A pointer to the DPLL with @id
+ */
+struct intel_shared_dpll *
+intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
+			    enum intel_dpll_id id)
+{
+	return &dev_priv->shared_dplls[id];
+}
+
+/**
+ * intel_get_shared_dpll_id - get the id of a DPLL
+ * @dev_priv: i915 device instance
+ * @pll: the DPLL
+ *
+ * Returns:
+ * The id of @pll
+ */
+enum intel_dpll_id
+intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
+			 struct intel_shared_dpll *pll)
+{
+	if (WARN_ON(pll < dev_priv->shared_dplls||
+		    pll > &dev_priv->shared_dplls[dev_priv->num_shared_dpll]))
+		return -1;
+
+	return (enum intel_dpll_id) (pll - dev_priv->shared_dplls);
+}
+
+/* For ILK+ */
+void assert_shared_dpll(struct drm_i915_private *dev_priv,
+			struct intel_shared_dpll *pll,
+			bool state)
+{
+	bool cur_state;
+	struct intel_dpll_hw_state hw_state;
+
+	if (WARN(!pll, "asserting DPLL %s with no DPLL\n", onoff(state)))
+		return;
+
+	cur_state = pll->info->funcs->get_hw_state(dev_priv, pll, &hw_state);
+	I915_STATE_WARN(cur_state != state,
+	     "%s assertion failure (expected %s, current %s)\n",
+			pll->info->name, onoff(state), onoff(cur_state));
+}
+
+/**
+ * intel_prepare_shared_dpll - call a dpll's prepare hook
+ * @crtc_state: CRTC, and its state, which has a shared dpll
+ *
+ * This calls the PLL's prepare hook if it has one and if the PLL is not
+ * already enabled. The prepare hook is platform specific.
+ */
+void intel_prepare_shared_dpll(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll = crtc_state->shared_dpll;
+
+	if (WARN_ON(pll == NULL))
+		return;
+
+	mutex_lock(&dev_priv->dpll_lock);
+	WARN_ON(!pll->state.crtc_mask);
+	if (!pll->active_mask) {
+		DRM_DEBUG_DRIVER("setting up %s\n", pll->info->name);
+		WARN_ON(pll->on);
+		assert_shared_dpll_disabled(dev_priv, pll);
+
+		pll->info->funcs->prepare(dev_priv, pll);
+	}
+	mutex_unlock(&dev_priv->dpll_lock);
+}
+
+/**
+ * intel_enable_shared_dpll - enable a CRTC's shared DPLL
+ * @crtc_state: CRTC, and its state, which has a shared DPLL
+ *
+ * Enable the shared DPLL used by @crtc.
+ */
+void intel_enable_shared_dpll(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll = crtc_state->shared_dpll;
+	unsigned int crtc_mask = drm_crtc_mask(&crtc->base);
+	unsigned int old_mask;
+
+	if (WARN_ON(pll == NULL))
+		return;
+
+	mutex_lock(&dev_priv->dpll_lock);
+	old_mask = pll->active_mask;
+
+	if (WARN_ON(!(pll->state.crtc_mask & crtc_mask)) ||
+	    WARN_ON(pll->active_mask & crtc_mask))
+		goto out;
+
+	pll->active_mask |= crtc_mask;
+
+	DRM_DEBUG_KMS("enable %s (active %x, on? %d) for crtc %d\n",
+		      pll->info->name, pll->active_mask, pll->on,
+		      crtc->base.base.id);
+
+	if (old_mask) {
+		WARN_ON(!pll->on);
+		assert_shared_dpll_enabled(dev_priv, pll);
+		goto out;
+	}
+	WARN_ON(pll->on);
+
+	DRM_DEBUG_KMS("enabling %s\n", pll->info->name);
+	pll->info->funcs->enable(dev_priv, pll);
+	pll->on = true;
+
+out:
+	mutex_unlock(&dev_priv->dpll_lock);
+}
+
+/**
+ * intel_disable_shared_dpll - disable a CRTC's shared DPLL
+ * @crtc_state: CRTC, and its state, which has a shared DPLL
+ *
+ * Disable the shared DPLL used by @crtc.
+ */
+void intel_disable_shared_dpll(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll = crtc_state->shared_dpll;
+	unsigned int crtc_mask = drm_crtc_mask(&crtc->base);
+
+	/* PCH only available on ILK+ */
+	if (INTEL_GEN(dev_priv) < 5)
+		return;
+
+	if (pll == NULL)
+		return;
+
+	mutex_lock(&dev_priv->dpll_lock);
+	if (WARN_ON(!(pll->active_mask & crtc_mask)))
+		goto out;
+
+	DRM_DEBUG_KMS("disable %s (active %x, on? %d) for crtc %d\n",
+		      pll->info->name, pll->active_mask, pll->on,
+		      crtc->base.base.id);
+
+	assert_shared_dpll_enabled(dev_priv, pll);
+	WARN_ON(!pll->on);
+
+	pll->active_mask &= ~crtc_mask;
+	if (pll->active_mask)
+		goto out;
+
+	DRM_DEBUG_KMS("disabling %s\n", pll->info->name);
+	pll->info->funcs->disable(dev_priv, pll);
+	pll->on = false;
+
+out:
+	mutex_unlock(&dev_priv->dpll_lock);
+}
+
+static struct intel_shared_dpll *
+intel_find_shared_dpll(struct intel_crtc_state *crtc_state,
+		       enum intel_dpll_id range_min,
+		       enum intel_dpll_id range_max)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll, *unused_pll = NULL;
+	struct intel_shared_dpll_state *shared_dpll;
+	enum intel_dpll_id i;
+
+	shared_dpll = intel_atomic_get_shared_dpll_state(crtc_state->base.state);
+
+	for (i = range_min; i <= range_max; i++) {
+		pll = &dev_priv->shared_dplls[i];
+
+		/* Only want to check enabled timings first */
+		if (shared_dpll[i].crtc_mask == 0) {
+			if (!unused_pll)
+				unused_pll = pll;
+			continue;
+		}
+
+		if (memcmp(&crtc_state->dpll_hw_state,
+			   &shared_dpll[i].hw_state,
+			   sizeof(crtc_state->dpll_hw_state)) == 0) {
+			DRM_DEBUG_KMS("[CRTC:%d:%s] sharing existing %s (crtc mask 0x%08x, active %x)\n",
+				      crtc->base.base.id, crtc->base.name,
+				      pll->info->name,
+				      shared_dpll[i].crtc_mask,
+				      pll->active_mask);
+			return pll;
+		}
+	}
+
+	/* Ok no matching timings, maybe there's a free one? */
+	if (unused_pll) {
+		DRM_DEBUG_KMS("[CRTC:%d:%s] allocated %s\n",
+			      crtc->base.base.id, crtc->base.name,
+			      unused_pll->info->name);
+		return unused_pll;
+	}
+
+	return NULL;
+}
+
+static void
+intel_reference_shared_dpll(struct intel_shared_dpll *pll,
+			    struct intel_crtc_state *crtc_state)
+{
+	struct intel_shared_dpll_state *shared_dpll;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	const enum intel_dpll_id id = pll->info->id;
+
+	shared_dpll = intel_atomic_get_shared_dpll_state(crtc_state->base.state);
+
+	if (shared_dpll[id].crtc_mask == 0)
+		shared_dpll[id].hw_state =
+			crtc_state->dpll_hw_state;
+
+	crtc_state->shared_dpll = pll;
+	DRM_DEBUG_DRIVER("using %s for pipe %c\n", pll->info->name,
+			 pipe_name(crtc->pipe));
+
+	shared_dpll[id].crtc_mask |= 1 << crtc->pipe;
+}
+
+/**
+ * intel_shared_dpll_swap_state - make atomic DPLL configuration effective
+ * @state: atomic state
+ *
+ * This is the dpll version of drm_atomic_helper_swap_state() since the
+ * helper does not handle driver-specific global state.
+ *
+ * For consistency with atomic helpers this function does a complete swap,
+ * i.e. it also puts the current state into @state, even though there is no
+ * need for that at this moment.
+ */
+void intel_shared_dpll_swap_state(struct drm_atomic_state *state)
+{
+	struct drm_i915_private *dev_priv = to_i915(state->dev);
+	struct intel_shared_dpll_state *shared_dpll;
+	struct intel_shared_dpll *pll;
+	enum intel_dpll_id i;
+
+	if (!to_intel_atomic_state(state)->dpll_set)
+		return;
+
+	shared_dpll = to_intel_atomic_state(state)->shared_dpll;
+	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+		struct intel_shared_dpll_state tmp;
+
+		pll = &dev_priv->shared_dplls[i];
+
+		tmp = pll->state;
+		pll->state = shared_dpll[i];
+		shared_dpll[i] = tmp;
+	}
+}
+
+static bool ibx_pch_dpll_get_hw_state(struct drm_i915_private *dev_priv,
+				      struct intel_shared_dpll *pll,
+				      struct intel_dpll_hw_state *hw_state)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	intel_wakeref_t wakeref;
+	u32 val;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(PCH_DPLL(id));
+	hw_state->dpll = val;
+	hw_state->fp0 = I915_READ(PCH_FP0(id));
+	hw_state->fp1 = I915_READ(PCH_FP1(id));
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return val & DPLL_VCO_ENABLE;
+}
+
+static void ibx_pch_dpll_prepare(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+
+	I915_WRITE(PCH_FP0(id), pll->state.hw_state.fp0);
+	I915_WRITE(PCH_FP1(id), pll->state.hw_state.fp1);
+}
+
+static void ibx_assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+	bool enabled;
+
+	I915_STATE_WARN_ON(!(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
+
+	val = I915_READ(PCH_DREF_CONTROL);
+	enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
+			    DREF_SUPERSPREAD_SOURCE_MASK));
+	I915_STATE_WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
+}
+
+static void ibx_pch_dpll_enable(struct drm_i915_private *dev_priv,
+				struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+
+	/* PCH refclock must be enabled first */
+	ibx_assert_pch_refclk_enabled(dev_priv);
+
+	I915_WRITE(PCH_DPLL(id), pll->state.hw_state.dpll);
+
+	/* Wait for the clocks to stabilize. */
+	POSTING_READ(PCH_DPLL(id));
+	udelay(150);
+
+	/* The pixel multiplier can only be updated once the
+	 * DPLL is enabled and the clocks are stable.
+	 *
+	 * So write it again.
+	 */
+	I915_WRITE(PCH_DPLL(id), pll->state.hw_state.dpll);
+	POSTING_READ(PCH_DPLL(id));
+	udelay(200);
+}
+
+static void ibx_pch_dpll_disable(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+
+	I915_WRITE(PCH_DPLL(id), 0);
+	POSTING_READ(PCH_DPLL(id));
+	udelay(200);
+}
+
+static struct intel_shared_dpll *
+ibx_get_dpll(struct intel_crtc_state *crtc_state,
+	     struct intel_encoder *encoder)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll;
+	enum intel_dpll_id i;
+
+	if (HAS_PCH_IBX(dev_priv)) {
+		/* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
+		i = (enum intel_dpll_id) crtc->pipe;
+		pll = &dev_priv->shared_dplls[i];
+
+		DRM_DEBUG_KMS("[CRTC:%d:%s] using pre-allocated %s\n",
+			      crtc->base.base.id, crtc->base.name,
+			      pll->info->name);
+	} else {
+		pll = intel_find_shared_dpll(crtc_state,
+					     DPLL_ID_PCH_PLL_A,
+					     DPLL_ID_PCH_PLL_B);
+	}
+
+	if (!pll)
+		return NULL;
+
+	/* reference the pll */
+	intel_reference_shared_dpll(pll, crtc_state);
+
+	return pll;
+}
+
+static void ibx_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	DRM_DEBUG_KMS("dpll_hw_state: dpll: 0x%x, dpll_md: 0x%x, "
+		      "fp0: 0x%x, fp1: 0x%x\n",
+		      hw_state->dpll,
+		      hw_state->dpll_md,
+		      hw_state->fp0,
+		      hw_state->fp1);
+}
+
+static const struct intel_shared_dpll_funcs ibx_pch_dpll_funcs = {
+	.prepare = ibx_pch_dpll_prepare,
+	.enable = ibx_pch_dpll_enable,
+	.disable = ibx_pch_dpll_disable,
+	.get_hw_state = ibx_pch_dpll_get_hw_state,
+};
+
+static void hsw_ddi_wrpll_enable(struct drm_i915_private *dev_priv,
+			       struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+
+	I915_WRITE(WRPLL_CTL(id), pll->state.hw_state.wrpll);
+	POSTING_READ(WRPLL_CTL(id));
+	udelay(20);
+}
+
+static void hsw_ddi_spll_enable(struct drm_i915_private *dev_priv,
+				struct intel_shared_dpll *pll)
+{
+	I915_WRITE(SPLL_CTL, pll->state.hw_state.spll);
+	POSTING_READ(SPLL_CTL);
+	udelay(20);
+}
+
+static void hsw_ddi_wrpll_disable(struct drm_i915_private *dev_priv,
+				  struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	u32 val;
+
+	val = I915_READ(WRPLL_CTL(id));
+	I915_WRITE(WRPLL_CTL(id), val & ~WRPLL_PLL_ENABLE);
+	POSTING_READ(WRPLL_CTL(id));
+}
+
+static void hsw_ddi_spll_disable(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll)
+{
+	u32 val;
+
+	val = I915_READ(SPLL_CTL);
+	I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE);
+	POSTING_READ(SPLL_CTL);
+}
+
+static bool hsw_ddi_wrpll_get_hw_state(struct drm_i915_private *dev_priv,
+				       struct intel_shared_dpll *pll,
+				       struct intel_dpll_hw_state *hw_state)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	intel_wakeref_t wakeref;
+	u32 val;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(WRPLL_CTL(id));
+	hw_state->wrpll = val;
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return val & WRPLL_PLL_ENABLE;
+}
+
+static bool hsw_ddi_spll_get_hw_state(struct drm_i915_private *dev_priv,
+				      struct intel_shared_dpll *pll,
+				      struct intel_dpll_hw_state *hw_state)
+{
+	intel_wakeref_t wakeref;
+	u32 val;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(SPLL_CTL);
+	hw_state->spll = val;
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return val & SPLL_PLL_ENABLE;
+}
+
+#define LC_FREQ 2700
+#define LC_FREQ_2K U64_C(LC_FREQ * 2000)
+
+#define P_MIN 2
+#define P_MAX 64
+#define P_INC 2
+
+/* Constraints for PLL good behavior */
+#define REF_MIN 48
+#define REF_MAX 400
+#define VCO_MIN 2400
+#define VCO_MAX 4800
+
+struct hsw_wrpll_rnp {
+	unsigned p, n2, r2;
+};
+
+static unsigned hsw_wrpll_get_budget_for_freq(int clock)
+{
+	unsigned budget;
+
+	switch (clock) {
+	case 25175000:
+	case 25200000:
+	case 27000000:
+	case 27027000:
+	case 37762500:
+	case 37800000:
+	case 40500000:
+	case 40541000:
+	case 54000000:
+	case 54054000:
+	case 59341000:
+	case 59400000:
+	case 72000000:
+	case 74176000:
+	case 74250000:
+	case 81000000:
+	case 81081000:
+	case 89012000:
+	case 89100000:
+	case 108000000:
+	case 108108000:
+	case 111264000:
+	case 111375000:
+	case 148352000:
+	case 148500000:
+	case 162000000:
+	case 162162000:
+	case 222525000:
+	case 222750000:
+	case 296703000:
+	case 297000000:
+		budget = 0;
+		break;
+	case 233500000:
+	case 245250000:
+	case 247750000:
+	case 253250000:
+	case 298000000:
+		budget = 1500;
+		break;
+	case 169128000:
+	case 169500000:
+	case 179500000:
+	case 202000000:
+		budget = 2000;
+		break;
+	case 256250000:
+	case 262500000:
+	case 270000000:
+	case 272500000:
+	case 273750000:
+	case 280750000:
+	case 281250000:
+	case 286000000:
+	case 291750000:
+		budget = 4000;
+		break;
+	case 267250000:
+	case 268500000:
+		budget = 5000;
+		break;
+	default:
+		budget = 1000;
+		break;
+	}
+
+	return budget;
+}
+
+static void hsw_wrpll_update_rnp(u64 freq2k, unsigned int budget,
+				 unsigned int r2, unsigned int n2,
+				 unsigned int p,
+				 struct hsw_wrpll_rnp *best)
+{
+	u64 a, b, c, d, diff, diff_best;
+
+	/* No best (r,n,p) yet */
+	if (best->p == 0) {
+		best->p = p;
+		best->n2 = n2;
+		best->r2 = r2;
+		return;
+	}
+
+	/*
+	 * Output clock is (LC_FREQ_2K / 2000) * N / (P * R), which compares to
+	 * freq2k.
+	 *
+	 * delta = 1e6 *
+	 *	   abs(freq2k - (LC_FREQ_2K * n2/(p * r2))) /
+	 *	   freq2k;
+	 *
+	 * and we would like delta <= budget.
+	 *
+	 * If the discrepancy is above the PPM-based budget, always prefer to
+	 * improve upon the previous solution.  However, if you're within the
+	 * budget, try to maximize Ref * VCO, that is N / (P * R^2).
+	 */
+	a = freq2k * budget * p * r2;
+	b = freq2k * budget * best->p * best->r2;
+	diff = abs_diff(freq2k * p * r2, LC_FREQ_2K * n2);
+	diff_best = abs_diff(freq2k * best->p * best->r2,
+			     LC_FREQ_2K * best->n2);
+	c = 1000000 * diff;
+	d = 1000000 * diff_best;
+
+	if (a < c && b < d) {
+		/* If both are above the budget, pick the closer */
+		if (best->p * best->r2 * diff < p * r2 * diff_best) {
+			best->p = p;
+			best->n2 = n2;
+			best->r2 = r2;
+		}
+	} else if (a >= c && b < d) {
+		/* If A is below the threshold but B is above it?  Update. */
+		best->p = p;
+		best->n2 = n2;
+		best->r2 = r2;
+	} else if (a >= c && b >= d) {
+		/* Both are below the limit, so pick the higher n2/(r2*r2) */
+		if (n2 * best->r2 * best->r2 > best->n2 * r2 * r2) {
+			best->p = p;
+			best->n2 = n2;
+			best->r2 = r2;
+		}
+	}
+	/* Otherwise a < c && b >= d, do nothing */
+}
+
+static void
+hsw_ddi_calculate_wrpll(int clock /* in Hz */,
+			unsigned *r2_out, unsigned *n2_out, unsigned *p_out)
+{
+	u64 freq2k;
+	unsigned p, n2, r2;
+	struct hsw_wrpll_rnp best = { 0, 0, 0 };
+	unsigned budget;
+
+	freq2k = clock / 100;
+
+	budget = hsw_wrpll_get_budget_for_freq(clock);
+
+	/* Special case handling for 540 pixel clock: bypass WR PLL entirely
+	 * and directly pass the LC PLL to it. */
+	if (freq2k == 5400000) {
+		*n2_out = 2;
+		*p_out = 1;
+		*r2_out = 2;
+		return;
+	}
+
+	/*
+	 * Ref = LC_FREQ / R, where Ref is the actual reference input seen by
+	 * the WR PLL.
+	 *
+	 * We want R so that REF_MIN <= Ref <= REF_MAX.
+	 * Injecting R2 = 2 * R gives:
+	 *   REF_MAX * r2 > LC_FREQ * 2 and
+	 *   REF_MIN * r2 < LC_FREQ * 2
+	 *
+	 * Which means the desired boundaries for r2 are:
+	 *  LC_FREQ * 2 / REF_MAX < r2 < LC_FREQ * 2 / REF_MIN
+	 *
+	 */
+	for (r2 = LC_FREQ * 2 / REF_MAX + 1;
+	     r2 <= LC_FREQ * 2 / REF_MIN;
+	     r2++) {
+
+		/*
+		 * VCO = N * Ref, that is: VCO = N * LC_FREQ / R
+		 *
+		 * Once again we want VCO_MIN <= VCO <= VCO_MAX.
+		 * Injecting R2 = 2 * R and N2 = 2 * N, we get:
+		 *   VCO_MAX * r2 > n2 * LC_FREQ and
+		 *   VCO_MIN * r2 < n2 * LC_FREQ)
+		 *
+		 * Which means the desired boundaries for n2 are:
+		 * VCO_MIN * r2 / LC_FREQ < n2 < VCO_MAX * r2 / LC_FREQ
+		 */
+		for (n2 = VCO_MIN * r2 / LC_FREQ + 1;
+		     n2 <= VCO_MAX * r2 / LC_FREQ;
+		     n2++) {
+
+			for (p = P_MIN; p <= P_MAX; p += P_INC)
+				hsw_wrpll_update_rnp(freq2k, budget,
+						     r2, n2, p, &best);
+		}
+	}
+
+	*n2_out = best.n2;
+	*p_out = best.p;
+	*r2_out = best.r2;
+}
+
+static struct intel_shared_dpll *hsw_ddi_hdmi_get_dpll(struct intel_crtc_state *crtc_state)
+{
+	struct intel_shared_dpll *pll;
+	u32 val;
+	unsigned int p, n2, r2;
+
+	hsw_ddi_calculate_wrpll(crtc_state->port_clock * 1000, &r2, &n2, &p);
+
+	val = WRPLL_PLL_ENABLE | WRPLL_REF_LCPLL |
+	      WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) |
+	      WRPLL_DIVIDER_POST(p);
+
+	crtc_state->dpll_hw_state.wrpll = val;
+
+	pll = intel_find_shared_dpll(crtc_state,
+				     DPLL_ID_WRPLL1, DPLL_ID_WRPLL2);
+
+	if (!pll)
+		return NULL;
+
+	return pll;
+}
+
+static struct intel_shared_dpll *
+hsw_ddi_dp_get_dpll(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	struct intel_shared_dpll *pll;
+	enum intel_dpll_id pll_id;
+	int clock = crtc_state->port_clock;
+
+	switch (clock / 2) {
+	case 81000:
+		pll_id = DPLL_ID_LCPLL_810;
+		break;
+	case 135000:
+		pll_id = DPLL_ID_LCPLL_1350;
+		break;
+	case 270000:
+		pll_id = DPLL_ID_LCPLL_2700;
+		break;
+	default:
+		DRM_DEBUG_KMS("Invalid clock for DP: %d\n", clock);
+		return NULL;
+	}
+
+	pll = intel_get_shared_dpll_by_id(dev_priv, pll_id);
+
+	if (!pll)
+		return NULL;
+
+	return pll;
+}
+
+static struct intel_shared_dpll *
+hsw_get_dpll(struct intel_crtc_state *crtc_state,
+	     struct intel_encoder *encoder)
+{
+	struct intel_shared_dpll *pll;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
+		pll = hsw_ddi_hdmi_get_dpll(crtc_state);
+	} else if (intel_crtc_has_dp_encoder(crtc_state)) {
+		pll = hsw_ddi_dp_get_dpll(crtc_state);
+	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
+		if (WARN_ON(crtc_state->port_clock / 2 != 135000))
+			return NULL;
+
+		crtc_state->dpll_hw_state.spll =
+			SPLL_PLL_ENABLE | SPLL_FREQ_1350MHz | SPLL_REF_MUXED_SSC;
+
+		pll = intel_find_shared_dpll(crtc_state,
+					     DPLL_ID_SPLL, DPLL_ID_SPLL);
+	} else {
+		return NULL;
+	}
+
+	if (!pll)
+		return NULL;
+
+	intel_reference_shared_dpll(pll, crtc_state);
+
+	return pll;
+}
+
+static void hsw_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	DRM_DEBUG_KMS("dpll_hw_state: wrpll: 0x%x spll: 0x%x\n",
+		      hw_state->wrpll, hw_state->spll);
+}
+
+static const struct intel_shared_dpll_funcs hsw_ddi_wrpll_funcs = {
+	.enable = hsw_ddi_wrpll_enable,
+	.disable = hsw_ddi_wrpll_disable,
+	.get_hw_state = hsw_ddi_wrpll_get_hw_state,
+};
+
+static const struct intel_shared_dpll_funcs hsw_ddi_spll_funcs = {
+	.enable = hsw_ddi_spll_enable,
+	.disable = hsw_ddi_spll_disable,
+	.get_hw_state = hsw_ddi_spll_get_hw_state,
+};
+
+static void hsw_ddi_lcpll_enable(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll)
+{
+}
+
+static void hsw_ddi_lcpll_disable(struct drm_i915_private *dev_priv,
+				  struct intel_shared_dpll *pll)
+{
+}
+
+static bool hsw_ddi_lcpll_get_hw_state(struct drm_i915_private *dev_priv,
+				       struct intel_shared_dpll *pll,
+				       struct intel_dpll_hw_state *hw_state)
+{
+	return true;
+}
+
+static const struct intel_shared_dpll_funcs hsw_ddi_lcpll_funcs = {
+	.enable = hsw_ddi_lcpll_enable,
+	.disable = hsw_ddi_lcpll_disable,
+	.get_hw_state = hsw_ddi_lcpll_get_hw_state,
+};
+
+struct skl_dpll_regs {
+	i915_reg_t ctl, cfgcr1, cfgcr2;
+};
+
+/* this array is indexed by the *shared* pll id */
+static const struct skl_dpll_regs skl_dpll_regs[4] = {
+	{
+		/* DPLL 0 */
+		.ctl = LCPLL1_CTL,
+		/* DPLL 0 doesn't support HDMI mode */
+	},
+	{
+		/* DPLL 1 */
+		.ctl = LCPLL2_CTL,
+		.cfgcr1 = DPLL_CFGCR1(SKL_DPLL1),
+		.cfgcr2 = DPLL_CFGCR2(SKL_DPLL1),
+	},
+	{
+		/* DPLL 2 */
+		.ctl = WRPLL_CTL(0),
+		.cfgcr1 = DPLL_CFGCR1(SKL_DPLL2),
+		.cfgcr2 = DPLL_CFGCR2(SKL_DPLL2),
+	},
+	{
+		/* DPLL 3 */
+		.ctl = WRPLL_CTL(1),
+		.cfgcr1 = DPLL_CFGCR1(SKL_DPLL3),
+		.cfgcr2 = DPLL_CFGCR2(SKL_DPLL3),
+	},
+};
+
+static void skl_ddi_pll_write_ctrl1(struct drm_i915_private *dev_priv,
+				    struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	u32 val;
+
+	val = I915_READ(DPLL_CTRL1);
+
+	val &= ~(DPLL_CTRL1_HDMI_MODE(id) |
+		 DPLL_CTRL1_SSC(id) |
+		 DPLL_CTRL1_LINK_RATE_MASK(id));
+	val |= pll->state.hw_state.ctrl1 << (id * 6);
+
+	I915_WRITE(DPLL_CTRL1, val);
+	POSTING_READ(DPLL_CTRL1);
+}
+
+static void skl_ddi_pll_enable(struct drm_i915_private *dev_priv,
+			       struct intel_shared_dpll *pll)
+{
+	const struct skl_dpll_regs *regs = skl_dpll_regs;
+	const enum intel_dpll_id id = pll->info->id;
+
+	skl_ddi_pll_write_ctrl1(dev_priv, pll);
+
+	I915_WRITE(regs[id].cfgcr1, pll->state.hw_state.cfgcr1);
+	I915_WRITE(regs[id].cfgcr2, pll->state.hw_state.cfgcr2);
+	POSTING_READ(regs[id].cfgcr1);
+	POSTING_READ(regs[id].cfgcr2);
+
+	/* the enable bit is always bit 31 */
+	I915_WRITE(regs[id].ctl,
+		   I915_READ(regs[id].ctl) | LCPLL_PLL_ENABLE);
+
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    DPLL_STATUS,
+				    DPLL_LOCK(id),
+				    DPLL_LOCK(id),
+				    5))
+		DRM_ERROR("DPLL %d not locked\n", id);
+}
+
+static void skl_ddi_dpll0_enable(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll)
+{
+	skl_ddi_pll_write_ctrl1(dev_priv, pll);
+}
+
+static void skl_ddi_pll_disable(struct drm_i915_private *dev_priv,
+				struct intel_shared_dpll *pll)
+{
+	const struct skl_dpll_regs *regs = skl_dpll_regs;
+	const enum intel_dpll_id id = pll->info->id;
+
+	/* the enable bit is always bit 31 */
+	I915_WRITE(regs[id].ctl,
+		   I915_READ(regs[id].ctl) & ~LCPLL_PLL_ENABLE);
+	POSTING_READ(regs[id].ctl);
+}
+
+static void skl_ddi_dpll0_disable(struct drm_i915_private *dev_priv,
+				  struct intel_shared_dpll *pll)
+{
+}
+
+static bool skl_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
+				     struct intel_shared_dpll *pll,
+				     struct intel_dpll_hw_state *hw_state)
+{
+	u32 val;
+	const struct skl_dpll_regs *regs = skl_dpll_regs;
+	const enum intel_dpll_id id = pll->info->id;
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	ret = false;
+
+	val = I915_READ(regs[id].ctl);
+	if (!(val & LCPLL_PLL_ENABLE))
+		goto out;
+
+	val = I915_READ(DPLL_CTRL1);
+	hw_state->ctrl1 = (val >> (id * 6)) & 0x3f;
+
+	/* avoid reading back stale values if HDMI mode is not enabled */
+	if (val & DPLL_CTRL1_HDMI_MODE(id)) {
+		hw_state->cfgcr1 = I915_READ(regs[id].cfgcr1);
+		hw_state->cfgcr2 = I915_READ(regs[id].cfgcr2);
+	}
+	ret = true;
+
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return ret;
+}
+
+static bool skl_ddi_dpll0_get_hw_state(struct drm_i915_private *dev_priv,
+				       struct intel_shared_dpll *pll,
+				       struct intel_dpll_hw_state *hw_state)
+{
+	const struct skl_dpll_regs *regs = skl_dpll_regs;
+	const enum intel_dpll_id id = pll->info->id;
+	intel_wakeref_t wakeref;
+	u32 val;
+	bool ret;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	ret = false;
+
+	/* DPLL0 is always enabled since it drives CDCLK */
+	val = I915_READ(regs[id].ctl);
+	if (WARN_ON(!(val & LCPLL_PLL_ENABLE)))
+		goto out;
+
+	val = I915_READ(DPLL_CTRL1);
+	hw_state->ctrl1 = (val >> (id * 6)) & 0x3f;
+
+	ret = true;
+
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return ret;
+}
+
+struct skl_wrpll_context {
+	u64 min_deviation;		/* current minimal deviation */
+	u64 central_freq;		/* chosen central freq */
+	u64 dco_freq;			/* chosen dco freq */
+	unsigned int p;			/* chosen divider */
+};
+
+static void skl_wrpll_context_init(struct skl_wrpll_context *ctx)
+{
+	memset(ctx, 0, sizeof(*ctx));
+
+	ctx->min_deviation = U64_MAX;
+}
+
+/* DCO freq must be within +1%/-6%  of the DCO central freq */
+#define SKL_DCO_MAX_PDEVIATION	100
+#define SKL_DCO_MAX_NDEVIATION	600
+
+static void skl_wrpll_try_divider(struct skl_wrpll_context *ctx,
+				  u64 central_freq,
+				  u64 dco_freq,
+				  unsigned int divider)
+{
+	u64 deviation;
+
+	deviation = div64_u64(10000 * abs_diff(dco_freq, central_freq),
+			      central_freq);
+
+	/* positive deviation */
+	if (dco_freq >= central_freq) {
+		if (deviation < SKL_DCO_MAX_PDEVIATION &&
+		    deviation < ctx->min_deviation) {
+			ctx->min_deviation = deviation;
+			ctx->central_freq = central_freq;
+			ctx->dco_freq = dco_freq;
+			ctx->p = divider;
+		}
+	/* negative deviation */
+	} else if (deviation < SKL_DCO_MAX_NDEVIATION &&
+		   deviation < ctx->min_deviation) {
+		ctx->min_deviation = deviation;
+		ctx->central_freq = central_freq;
+		ctx->dco_freq = dco_freq;
+		ctx->p = divider;
+	}
+}
+
+static void skl_wrpll_get_multipliers(unsigned int p,
+				      unsigned int *p0 /* out */,
+				      unsigned int *p1 /* out */,
+				      unsigned int *p2 /* out */)
+{
+	/* even dividers */
+	if (p % 2 == 0) {
+		unsigned int half = p / 2;
+
+		if (half == 1 || half == 2 || half == 3 || half == 5) {
+			*p0 = 2;
+			*p1 = 1;
+			*p2 = half;
+		} else if (half % 2 == 0) {
+			*p0 = 2;
+			*p1 = half / 2;
+			*p2 = 2;
+		} else if (half % 3 == 0) {
+			*p0 = 3;
+			*p1 = half / 3;
+			*p2 = 2;
+		} else if (half % 7 == 0) {
+			*p0 = 7;
+			*p1 = half / 7;
+			*p2 = 2;
+		}
+	} else if (p == 3 || p == 9) {  /* 3, 5, 7, 9, 15, 21, 35 */
+		*p0 = 3;
+		*p1 = 1;
+		*p2 = p / 3;
+	} else if (p == 5 || p == 7) {
+		*p0 = p;
+		*p1 = 1;
+		*p2 = 1;
+	} else if (p == 15) {
+		*p0 = 3;
+		*p1 = 1;
+		*p2 = 5;
+	} else if (p == 21) {
+		*p0 = 7;
+		*p1 = 1;
+		*p2 = 3;
+	} else if (p == 35) {
+		*p0 = 7;
+		*p1 = 1;
+		*p2 = 5;
+	}
+}
+
+struct skl_wrpll_params {
+	u32 dco_fraction;
+	u32 dco_integer;
+	u32 qdiv_ratio;
+	u32 qdiv_mode;
+	u32 kdiv;
+	u32 pdiv;
+	u32 central_freq;
+};
+
+static void skl_wrpll_params_populate(struct skl_wrpll_params *params,
+				      u64 afe_clock,
+				      u64 central_freq,
+				      u32 p0, u32 p1, u32 p2)
+{
+	u64 dco_freq;
+
+	switch (central_freq) {
+	case 9600000000ULL:
+		params->central_freq = 0;
+		break;
+	case 9000000000ULL:
+		params->central_freq = 1;
+		break;
+	case 8400000000ULL:
+		params->central_freq = 3;
+	}
+
+	switch (p0) {
+	case 1:
+		params->pdiv = 0;
+		break;
+	case 2:
+		params->pdiv = 1;
+		break;
+	case 3:
+		params->pdiv = 2;
+		break;
+	case 7:
+		params->pdiv = 4;
+		break;
+	default:
+		WARN(1, "Incorrect PDiv\n");
+	}
+
+	switch (p2) {
+	case 5:
+		params->kdiv = 0;
+		break;
+	case 2:
+		params->kdiv = 1;
+		break;
+	case 3:
+		params->kdiv = 2;
+		break;
+	case 1:
+		params->kdiv = 3;
+		break;
+	default:
+		WARN(1, "Incorrect KDiv\n");
+	}
+
+	params->qdiv_ratio = p1;
+	params->qdiv_mode = (params->qdiv_ratio == 1) ? 0 : 1;
+
+	dco_freq = p0 * p1 * p2 * afe_clock;
+
+	/*
+	 * Intermediate values are in Hz.
+	 * Divide by MHz to match bsepc
+	 */
+	params->dco_integer = div_u64(dco_freq, 24 * MHz(1));
+	params->dco_fraction =
+		div_u64((div_u64(dco_freq, 24) -
+			 params->dco_integer * MHz(1)) * 0x8000, MHz(1));
+}
+
+static bool
+skl_ddi_calculate_wrpll(int clock /* in Hz */,
+			struct skl_wrpll_params *wrpll_params)
+{
+	u64 afe_clock = clock * 5; /* AFE Clock is 5x Pixel clock */
+	u64 dco_central_freq[3] = { 8400000000ULL,
+				    9000000000ULL,
+				    9600000000ULL };
+	static const int even_dividers[] = {  4,  6,  8, 10, 12, 14, 16, 18, 20,
+					     24, 28, 30, 32, 36, 40, 42, 44,
+					     48, 52, 54, 56, 60, 64, 66, 68,
+					     70, 72, 76, 78, 80, 84, 88, 90,
+					     92, 96, 98 };
+	static const int odd_dividers[] = { 3, 5, 7, 9, 15, 21, 35 };
+	static const struct {
+		const int *list;
+		int n_dividers;
+	} dividers[] = {
+		{ even_dividers, ARRAY_SIZE(even_dividers) },
+		{ odd_dividers, ARRAY_SIZE(odd_dividers) },
+	};
+	struct skl_wrpll_context ctx;
+	unsigned int dco, d, i;
+	unsigned int p0, p1, p2;
+
+	skl_wrpll_context_init(&ctx);
+
+	for (d = 0; d < ARRAY_SIZE(dividers); d++) {
+		for (dco = 0; dco < ARRAY_SIZE(dco_central_freq); dco++) {
+			for (i = 0; i < dividers[d].n_dividers; i++) {
+				unsigned int p = dividers[d].list[i];
+				u64 dco_freq = p * afe_clock;
+
+				skl_wrpll_try_divider(&ctx,
+						      dco_central_freq[dco],
+						      dco_freq,
+						      p);
+				/*
+				 * Skip the remaining dividers if we're sure to
+				 * have found the definitive divider, we can't
+				 * improve a 0 deviation.
+				 */
+				if (ctx.min_deviation == 0)
+					goto skip_remaining_dividers;
+			}
+		}
+
+skip_remaining_dividers:
+		/*
+		 * If a solution is found with an even divider, prefer
+		 * this one.
+		 */
+		if (d == 0 && ctx.p)
+			break;
+	}
+
+	if (!ctx.p) {
+		DRM_DEBUG_DRIVER("No valid divider found for %dHz\n", clock);
+		return false;
+	}
+
+	/*
+	 * gcc incorrectly analyses that these can be used without being
+	 * initialized. To be fair, it's hard to guess.
+	 */
+	p0 = p1 = p2 = 0;
+	skl_wrpll_get_multipliers(ctx.p, &p0, &p1, &p2);
+	skl_wrpll_params_populate(wrpll_params, afe_clock, ctx.central_freq,
+				  p0, p1, p2);
+
+	return true;
+}
+
+static bool skl_ddi_hdmi_pll_dividers(struct intel_crtc_state *crtc_state)
+{
+	u32 ctrl1, cfgcr1, cfgcr2;
+	struct skl_wrpll_params wrpll_params = { 0, };
+
+	/*
+	 * See comment in intel_dpll_hw_state to understand why we always use 0
+	 * as the DPLL id in this function.
+	 */
+	ctrl1 = DPLL_CTRL1_OVERRIDE(0);
+
+	ctrl1 |= DPLL_CTRL1_HDMI_MODE(0);
+
+	if (!skl_ddi_calculate_wrpll(crtc_state->port_clock * 1000,
+				     &wrpll_params))
+		return false;
+
+	cfgcr1 = DPLL_CFGCR1_FREQ_ENABLE |
+		DPLL_CFGCR1_DCO_FRACTION(wrpll_params.dco_fraction) |
+		wrpll_params.dco_integer;
+
+	cfgcr2 = DPLL_CFGCR2_QDIV_RATIO(wrpll_params.qdiv_ratio) |
+		DPLL_CFGCR2_QDIV_MODE(wrpll_params.qdiv_mode) |
+		DPLL_CFGCR2_KDIV(wrpll_params.kdiv) |
+		DPLL_CFGCR2_PDIV(wrpll_params.pdiv) |
+		wrpll_params.central_freq;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	crtc_state->dpll_hw_state.ctrl1 = ctrl1;
+	crtc_state->dpll_hw_state.cfgcr1 = cfgcr1;
+	crtc_state->dpll_hw_state.cfgcr2 = cfgcr2;
+	return true;
+}
+
+static bool
+skl_ddi_dp_set_dpll_hw_state(struct intel_crtc_state *crtc_state)
+{
+	u32 ctrl1;
+
+	/*
+	 * See comment in intel_dpll_hw_state to understand why we always use 0
+	 * as the DPLL id in this function.
+	 */
+	ctrl1 = DPLL_CTRL1_OVERRIDE(0);
+	switch (crtc_state->port_clock / 2) {
+	case 81000:
+		ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, 0);
+		break;
+	case 135000:
+		ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, 0);
+		break;
+	case 270000:
+		ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, 0);
+		break;
+		/* eDP 1.4 rates */
+	case 162000:
+		ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, 0);
+		break;
+	case 108000:
+		ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, 0);
+		break;
+	case 216000:
+		ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, 0);
+		break;
+	}
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	crtc_state->dpll_hw_state.ctrl1 = ctrl1;
+
+	return true;
+}
+
+static struct intel_shared_dpll *
+skl_get_dpll(struct intel_crtc_state *crtc_state,
+	     struct intel_encoder *encoder)
+{
+	struct intel_shared_dpll *pll;
+	bool bret;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
+		bret = skl_ddi_hdmi_pll_dividers(crtc_state);
+		if (!bret) {
+			DRM_DEBUG_KMS("Could not get HDMI pll dividers.\n");
+			return NULL;
+		}
+	} else if (intel_crtc_has_dp_encoder(crtc_state)) {
+		bret = skl_ddi_dp_set_dpll_hw_state(crtc_state);
+		if (!bret) {
+			DRM_DEBUG_KMS("Could not set DP dpll HW state.\n");
+			return NULL;
+		}
+	} else {
+		return NULL;
+	}
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP))
+		pll = intel_find_shared_dpll(crtc_state,
+					     DPLL_ID_SKL_DPLL0,
+					     DPLL_ID_SKL_DPLL0);
+	else
+		pll = intel_find_shared_dpll(crtc_state,
+					     DPLL_ID_SKL_DPLL1,
+					     DPLL_ID_SKL_DPLL3);
+	if (!pll)
+		return NULL;
+
+	intel_reference_shared_dpll(pll, crtc_state);
+
+	return pll;
+}
+
+static void skl_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	DRM_DEBUG_KMS("dpll_hw_state: "
+		      "ctrl1: 0x%x, cfgcr1: 0x%x, cfgcr2: 0x%x\n",
+		      hw_state->ctrl1,
+		      hw_state->cfgcr1,
+		      hw_state->cfgcr2);
+}
+
+static const struct intel_shared_dpll_funcs skl_ddi_pll_funcs = {
+	.enable = skl_ddi_pll_enable,
+	.disable = skl_ddi_pll_disable,
+	.get_hw_state = skl_ddi_pll_get_hw_state,
+};
+
+static const struct intel_shared_dpll_funcs skl_ddi_dpll0_funcs = {
+	.enable = skl_ddi_dpll0_enable,
+	.disable = skl_ddi_dpll0_disable,
+	.get_hw_state = skl_ddi_dpll0_get_hw_state,
+};
+
+static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
+				struct intel_shared_dpll *pll)
+{
+	u32 temp;
+	enum port port = (enum port)pll->info->id; /* 1:1 port->PLL mapping */
+	enum dpio_phy phy;
+	enum dpio_channel ch;
+
+	bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
+
+	/* Non-SSC reference */
+	temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
+	temp |= PORT_PLL_REF_SEL;
+	I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
+
+	if (IS_GEMINILAKE(dev_priv)) {
+		temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
+		temp |= PORT_PLL_POWER_ENABLE;
+		I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
+
+		if (wait_for_us((I915_READ(BXT_PORT_PLL_ENABLE(port)) &
+				 PORT_PLL_POWER_STATE), 200))
+			DRM_ERROR("Power state not set for PLL:%d\n", port);
+	}
+
+	/* Disable 10 bit clock */
+	temp = I915_READ(BXT_PORT_PLL_EBB_4(phy, ch));
+	temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
+	I915_WRITE(BXT_PORT_PLL_EBB_4(phy, ch), temp);
+
+	/* Write P1 & P2 */
+	temp = I915_READ(BXT_PORT_PLL_EBB_0(phy, ch));
+	temp &= ~(PORT_PLL_P1_MASK | PORT_PLL_P2_MASK);
+	temp |= pll->state.hw_state.ebb0;
+	I915_WRITE(BXT_PORT_PLL_EBB_0(phy, ch), temp);
+
+	/* Write M2 integer */
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 0));
+	temp &= ~PORT_PLL_M2_MASK;
+	temp |= pll->state.hw_state.pll0;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 0), temp);
+
+	/* Write N */
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 1));
+	temp &= ~PORT_PLL_N_MASK;
+	temp |= pll->state.hw_state.pll1;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 1), temp);
+
+	/* Write M2 fraction */
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 2));
+	temp &= ~PORT_PLL_M2_FRAC_MASK;
+	temp |= pll->state.hw_state.pll2;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 2), temp);
+
+	/* Write M2 fraction enable */
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 3));
+	temp &= ~PORT_PLL_M2_FRAC_ENABLE;
+	temp |= pll->state.hw_state.pll3;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 3), temp);
+
+	/* Write coeff */
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 6));
+	temp &= ~PORT_PLL_PROP_COEFF_MASK;
+	temp &= ~PORT_PLL_INT_COEFF_MASK;
+	temp &= ~PORT_PLL_GAIN_CTL_MASK;
+	temp |= pll->state.hw_state.pll6;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 6), temp);
+
+	/* Write calibration val */
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 8));
+	temp &= ~PORT_PLL_TARGET_CNT_MASK;
+	temp |= pll->state.hw_state.pll8;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 8), temp);
+
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 9));
+	temp &= ~PORT_PLL_LOCK_THRESHOLD_MASK;
+	temp |= pll->state.hw_state.pll9;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 9), temp);
+
+	temp = I915_READ(BXT_PORT_PLL(phy, ch, 10));
+	temp &= ~PORT_PLL_DCO_AMP_OVR_EN_H;
+	temp &= ~PORT_PLL_DCO_AMP_MASK;
+	temp |= pll->state.hw_state.pll10;
+	I915_WRITE(BXT_PORT_PLL(phy, ch, 10), temp);
+
+	/* Recalibrate with new settings */
+	temp = I915_READ(BXT_PORT_PLL_EBB_4(phy, ch));
+	temp |= PORT_PLL_RECALIBRATE;
+	I915_WRITE(BXT_PORT_PLL_EBB_4(phy, ch), temp);
+	temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
+	temp |= pll->state.hw_state.ebb4;
+	I915_WRITE(BXT_PORT_PLL_EBB_4(phy, ch), temp);
+
+	/* Enable PLL */
+	temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
+	temp |= PORT_PLL_ENABLE;
+	I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
+	POSTING_READ(BXT_PORT_PLL_ENABLE(port));
+
+	if (wait_for_us((I915_READ(BXT_PORT_PLL_ENABLE(port)) & PORT_PLL_LOCK),
+			200))
+		DRM_ERROR("PLL %d not locked\n", port);
+
+	if (IS_GEMINILAKE(dev_priv)) {
+		temp = I915_READ(BXT_PORT_TX_DW5_LN0(phy, ch));
+		temp |= DCC_DELAY_RANGE_2;
+		I915_WRITE(BXT_PORT_TX_DW5_GRP(phy, ch), temp);
+	}
+
+	/*
+	 * While we write to the group register to program all lanes at once we
+	 * can read only lane registers and we pick lanes 0/1 for that.
+	 */
+	temp = I915_READ(BXT_PORT_PCS_DW12_LN01(phy, ch));
+	temp &= ~LANE_STAGGER_MASK;
+	temp &= ~LANESTAGGER_STRAP_OVRD;
+	temp |= pll->state.hw_state.pcsdw12;
+	I915_WRITE(BXT_PORT_PCS_DW12_GRP(phy, ch), temp);
+}
+
+static void bxt_ddi_pll_disable(struct drm_i915_private *dev_priv,
+					struct intel_shared_dpll *pll)
+{
+	enum port port = (enum port)pll->info->id; /* 1:1 port->PLL mapping */
+	u32 temp;
+
+	temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
+	temp &= ~PORT_PLL_ENABLE;
+	I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
+	POSTING_READ(BXT_PORT_PLL_ENABLE(port));
+
+	if (IS_GEMINILAKE(dev_priv)) {
+		temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
+		temp &= ~PORT_PLL_POWER_ENABLE;
+		I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
+
+		if (wait_for_us(!(I915_READ(BXT_PORT_PLL_ENABLE(port)) &
+				PORT_PLL_POWER_STATE), 200))
+			DRM_ERROR("Power state not reset for PLL:%d\n", port);
+	}
+}
+
+static bool bxt_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
+					struct intel_shared_dpll *pll,
+					struct intel_dpll_hw_state *hw_state)
+{
+	enum port port = (enum port)pll->info->id; /* 1:1 port->PLL mapping */
+	intel_wakeref_t wakeref;
+	enum dpio_phy phy;
+	enum dpio_channel ch;
+	u32 val;
+	bool ret;
+
+	bxt_port_to_phy_channel(dev_priv, port, &phy, &ch);
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	ret = false;
+
+	val = I915_READ(BXT_PORT_PLL_ENABLE(port));
+	if (!(val & PORT_PLL_ENABLE))
+		goto out;
+
+	hw_state->ebb0 = I915_READ(BXT_PORT_PLL_EBB_0(phy, ch));
+	hw_state->ebb0 &= PORT_PLL_P1_MASK | PORT_PLL_P2_MASK;
+
+	hw_state->ebb4 = I915_READ(BXT_PORT_PLL_EBB_4(phy, ch));
+	hw_state->ebb4 &= PORT_PLL_10BIT_CLK_ENABLE;
+
+	hw_state->pll0 = I915_READ(BXT_PORT_PLL(phy, ch, 0));
+	hw_state->pll0 &= PORT_PLL_M2_MASK;
+
+	hw_state->pll1 = I915_READ(BXT_PORT_PLL(phy, ch, 1));
+	hw_state->pll1 &= PORT_PLL_N_MASK;
+
+	hw_state->pll2 = I915_READ(BXT_PORT_PLL(phy, ch, 2));
+	hw_state->pll2 &= PORT_PLL_M2_FRAC_MASK;
+
+	hw_state->pll3 = I915_READ(BXT_PORT_PLL(phy, ch, 3));
+	hw_state->pll3 &= PORT_PLL_M2_FRAC_ENABLE;
+
+	hw_state->pll6 = I915_READ(BXT_PORT_PLL(phy, ch, 6));
+	hw_state->pll6 &= PORT_PLL_PROP_COEFF_MASK |
+			  PORT_PLL_INT_COEFF_MASK |
+			  PORT_PLL_GAIN_CTL_MASK;
+
+	hw_state->pll8 = I915_READ(BXT_PORT_PLL(phy, ch, 8));
+	hw_state->pll8 &= PORT_PLL_TARGET_CNT_MASK;
+
+	hw_state->pll9 = I915_READ(BXT_PORT_PLL(phy, ch, 9));
+	hw_state->pll9 &= PORT_PLL_LOCK_THRESHOLD_MASK;
+
+	hw_state->pll10 = I915_READ(BXT_PORT_PLL(phy, ch, 10));
+	hw_state->pll10 &= PORT_PLL_DCO_AMP_OVR_EN_H |
+			   PORT_PLL_DCO_AMP_MASK;
+
+	/*
+	 * While we write to the group register to program all lanes at once we
+	 * can read only lane registers. We configure all lanes the same way, so
+	 * here just read out lanes 0/1 and output a note if lanes 2/3 differ.
+	 */
+	hw_state->pcsdw12 = I915_READ(BXT_PORT_PCS_DW12_LN01(phy, ch));
+	if (I915_READ(BXT_PORT_PCS_DW12_LN23(phy, ch)) != hw_state->pcsdw12)
+		DRM_DEBUG_DRIVER("lane stagger config different for lane 01 (%08x) and 23 (%08x)\n",
+				 hw_state->pcsdw12,
+				 I915_READ(BXT_PORT_PCS_DW12_LN23(phy, ch)));
+	hw_state->pcsdw12 &= LANE_STAGGER_MASK | LANESTAGGER_STRAP_OVRD;
+
+	ret = true;
+
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return ret;
+}
+
+/* bxt clock parameters */
+struct bxt_clk_div {
+	int clock;
+	u32 p1;
+	u32 p2;
+	u32 m2_int;
+	u32 m2_frac;
+	bool m2_frac_en;
+	u32 n;
+
+	int vco;
+};
+
+/* pre-calculated values for DP linkrates */
+static const struct bxt_clk_div bxt_dp_clk_val[] = {
+	{162000, 4, 2, 32, 1677722, 1, 1},
+	{270000, 4, 1, 27,       0, 0, 1},
+	{540000, 2, 1, 27,       0, 0, 1},
+	{216000, 3, 2, 32, 1677722, 1, 1},
+	{243000, 4, 1, 24, 1258291, 1, 1},
+	{324000, 4, 1, 32, 1677722, 1, 1},
+	{432000, 3, 1, 32, 1677722, 1, 1}
+};
+
+static bool
+bxt_ddi_hdmi_pll_dividers(struct intel_crtc_state *crtc_state,
+			  struct bxt_clk_div *clk_div)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct dpll best_clock;
+
+	/* Calculate HDMI div */
+	/*
+	 * FIXME: tie the following calculation into
+	 * i9xx_crtc_compute_clock
+	 */
+	if (!bxt_find_best_dpll(crtc_state, &best_clock)) {
+		DRM_DEBUG_DRIVER("no PLL dividers found for clock %d pipe %c\n",
+				 crtc_state->port_clock,
+				 pipe_name(crtc->pipe));
+		return false;
+	}
+
+	clk_div->p1 = best_clock.p1;
+	clk_div->p2 = best_clock.p2;
+	WARN_ON(best_clock.m1 != 2);
+	clk_div->n = best_clock.n;
+	clk_div->m2_int = best_clock.m2 >> 22;
+	clk_div->m2_frac = best_clock.m2 & ((1 << 22) - 1);
+	clk_div->m2_frac_en = clk_div->m2_frac != 0;
+
+	clk_div->vco = best_clock.vco;
+
+	return true;
+}
+
+static void bxt_ddi_dp_pll_dividers(struct intel_crtc_state *crtc_state,
+				    struct bxt_clk_div *clk_div)
+{
+	int clock = crtc_state->port_clock;
+	int i;
+
+	*clk_div = bxt_dp_clk_val[0];
+	for (i = 0; i < ARRAY_SIZE(bxt_dp_clk_val); ++i) {
+		if (bxt_dp_clk_val[i].clock == clock) {
+			*clk_div = bxt_dp_clk_val[i];
+			break;
+		}
+	}
+
+	clk_div->vco = clock * 10 / 2 * clk_div->p1 * clk_div->p2;
+}
+
+static bool bxt_ddi_set_dpll_hw_state(struct intel_crtc_state *crtc_state,
+				      const struct bxt_clk_div *clk_div)
+{
+	struct intel_dpll_hw_state *dpll_hw_state = &crtc_state->dpll_hw_state;
+	int clock = crtc_state->port_clock;
+	int vco = clk_div->vco;
+	u32 prop_coef, int_coef, gain_ctl, targ_cnt;
+	u32 lanestagger;
+
+	memset(dpll_hw_state, 0, sizeof(*dpll_hw_state));
+
+	if (vco >= 6200000 && vco <= 6700000) {
+		prop_coef = 4;
+		int_coef = 9;
+		gain_ctl = 3;
+		targ_cnt = 8;
+	} else if ((vco > 5400000 && vco < 6200000) ||
+			(vco >= 4800000 && vco < 5400000)) {
+		prop_coef = 5;
+		int_coef = 11;
+		gain_ctl = 3;
+		targ_cnt = 9;
+	} else if (vco == 5400000) {
+		prop_coef = 3;
+		int_coef = 8;
+		gain_ctl = 1;
+		targ_cnt = 9;
+	} else {
+		DRM_ERROR("Invalid VCO\n");
+		return false;
+	}
+
+	if (clock > 270000)
+		lanestagger = 0x18;
+	else if (clock > 135000)
+		lanestagger = 0x0d;
+	else if (clock > 67000)
+		lanestagger = 0x07;
+	else if (clock > 33000)
+		lanestagger = 0x04;
+	else
+		lanestagger = 0x02;
+
+	dpll_hw_state->ebb0 = PORT_PLL_P1(clk_div->p1) | PORT_PLL_P2(clk_div->p2);
+	dpll_hw_state->pll0 = clk_div->m2_int;
+	dpll_hw_state->pll1 = PORT_PLL_N(clk_div->n);
+	dpll_hw_state->pll2 = clk_div->m2_frac;
+
+	if (clk_div->m2_frac_en)
+		dpll_hw_state->pll3 = PORT_PLL_M2_FRAC_ENABLE;
+
+	dpll_hw_state->pll6 = prop_coef | PORT_PLL_INT_COEFF(int_coef);
+	dpll_hw_state->pll6 |= PORT_PLL_GAIN_CTL(gain_ctl);
+
+	dpll_hw_state->pll8 = targ_cnt;
+
+	dpll_hw_state->pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT;
+
+	dpll_hw_state->pll10 =
+		PORT_PLL_DCO_AMP(PORT_PLL_DCO_AMP_DEFAULT)
+		| PORT_PLL_DCO_AMP_OVR_EN_H;
+
+	dpll_hw_state->ebb4 = PORT_PLL_10BIT_CLK_ENABLE;
+
+	dpll_hw_state->pcsdw12 = LANESTAGGER_STRAP_OVRD | lanestagger;
+
+	return true;
+}
+
+static bool
+bxt_ddi_dp_set_dpll_hw_state(struct intel_crtc_state *crtc_state)
+{
+	struct bxt_clk_div clk_div = {};
+
+	bxt_ddi_dp_pll_dividers(crtc_state, &clk_div);
+
+	return bxt_ddi_set_dpll_hw_state(crtc_state, &clk_div);
+}
+
+static bool
+bxt_ddi_hdmi_set_dpll_hw_state(struct intel_crtc_state *crtc_state)
+{
+	struct bxt_clk_div clk_div = {};
+
+	bxt_ddi_hdmi_pll_dividers(crtc_state, &clk_div);
+
+	return bxt_ddi_set_dpll_hw_state(crtc_state, &clk_div);
+}
+
+static struct intel_shared_dpll *
+bxt_get_dpll(struct intel_crtc_state *crtc_state,
+	     struct intel_encoder *encoder)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_shared_dpll *pll;
+	enum intel_dpll_id id;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI) &&
+	    !bxt_ddi_hdmi_set_dpll_hw_state(crtc_state))
+		return NULL;
+
+	if (intel_crtc_has_dp_encoder(crtc_state) &&
+	    !bxt_ddi_dp_set_dpll_hw_state(crtc_state))
+		return NULL;
+
+	/* 1:1 mapping between ports and PLLs */
+	id = (enum intel_dpll_id) encoder->port;
+	pll = intel_get_shared_dpll_by_id(dev_priv, id);
+
+	DRM_DEBUG_KMS("[CRTC:%d:%s] using pre-allocated %s\n",
+		      crtc->base.base.id, crtc->base.name, pll->info->name);
+
+	intel_reference_shared_dpll(pll, crtc_state);
+
+	return pll;
+}
+
+static void bxt_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	DRM_DEBUG_KMS("dpll_hw_state: ebb0: 0x%x, ebb4: 0x%x,"
+		      "pll0: 0x%x, pll1: 0x%x, pll2: 0x%x, pll3: 0x%x, "
+		      "pll6: 0x%x, pll8: 0x%x, pll9: 0x%x, pll10: 0x%x, pcsdw12: 0x%x\n",
+		      hw_state->ebb0,
+		      hw_state->ebb4,
+		      hw_state->pll0,
+		      hw_state->pll1,
+		      hw_state->pll2,
+		      hw_state->pll3,
+		      hw_state->pll6,
+		      hw_state->pll8,
+		      hw_state->pll9,
+		      hw_state->pll10,
+		      hw_state->pcsdw12);
+}
+
+static const struct intel_shared_dpll_funcs bxt_ddi_pll_funcs = {
+	.enable = bxt_ddi_pll_enable,
+	.disable = bxt_ddi_pll_disable,
+	.get_hw_state = bxt_ddi_pll_get_hw_state,
+};
+
+struct intel_dpll_mgr {
+	const struct dpll_info *dpll_info;
+
+	struct intel_shared_dpll *(*get_dpll)(struct intel_crtc_state *crtc_state,
+					      struct intel_encoder *encoder);
+
+	void (*dump_hw_state)(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state);
+};
+
+static const struct dpll_info pch_plls[] = {
+	{ "PCH DPLL A", &ibx_pch_dpll_funcs, DPLL_ID_PCH_PLL_A, 0 },
+	{ "PCH DPLL B", &ibx_pch_dpll_funcs, DPLL_ID_PCH_PLL_B, 0 },
+	{ },
+};
+
+static const struct intel_dpll_mgr pch_pll_mgr = {
+	.dpll_info = pch_plls,
+	.get_dpll = ibx_get_dpll,
+	.dump_hw_state = ibx_dump_hw_state,
+};
+
+static const struct dpll_info hsw_plls[] = {
+	{ "WRPLL 1",    &hsw_ddi_wrpll_funcs, DPLL_ID_WRPLL1,     0 },
+	{ "WRPLL 2",    &hsw_ddi_wrpll_funcs, DPLL_ID_WRPLL2,     0 },
+	{ "SPLL",       &hsw_ddi_spll_funcs,  DPLL_ID_SPLL,       0 },
+	{ "LCPLL 810",  &hsw_ddi_lcpll_funcs, DPLL_ID_LCPLL_810,  INTEL_DPLL_ALWAYS_ON },
+	{ "LCPLL 1350", &hsw_ddi_lcpll_funcs, DPLL_ID_LCPLL_1350, INTEL_DPLL_ALWAYS_ON },
+	{ "LCPLL 2700", &hsw_ddi_lcpll_funcs, DPLL_ID_LCPLL_2700, INTEL_DPLL_ALWAYS_ON },
+	{ },
+};
+
+static const struct intel_dpll_mgr hsw_pll_mgr = {
+	.dpll_info = hsw_plls,
+	.get_dpll = hsw_get_dpll,
+	.dump_hw_state = hsw_dump_hw_state,
+};
+
+static const struct dpll_info skl_plls[] = {
+	{ "DPLL 0", &skl_ddi_dpll0_funcs, DPLL_ID_SKL_DPLL0, INTEL_DPLL_ALWAYS_ON },
+	{ "DPLL 1", &skl_ddi_pll_funcs,   DPLL_ID_SKL_DPLL1, 0 },
+	{ "DPLL 2", &skl_ddi_pll_funcs,   DPLL_ID_SKL_DPLL2, 0 },
+	{ "DPLL 3", &skl_ddi_pll_funcs,   DPLL_ID_SKL_DPLL3, 0 },
+	{ },
+};
+
+static const struct intel_dpll_mgr skl_pll_mgr = {
+	.dpll_info = skl_plls,
+	.get_dpll = skl_get_dpll,
+	.dump_hw_state = skl_dump_hw_state,
+};
+
+static const struct dpll_info bxt_plls[] = {
+	{ "PORT PLL A", &bxt_ddi_pll_funcs, DPLL_ID_SKL_DPLL0, 0 },
+	{ "PORT PLL B", &bxt_ddi_pll_funcs, DPLL_ID_SKL_DPLL1, 0 },
+	{ "PORT PLL C", &bxt_ddi_pll_funcs, DPLL_ID_SKL_DPLL2, 0 },
+	{ },
+};
+
+static const struct intel_dpll_mgr bxt_pll_mgr = {
+	.dpll_info = bxt_plls,
+	.get_dpll = bxt_get_dpll,
+	.dump_hw_state = bxt_dump_hw_state,
+};
+
+static void cnl_ddi_pll_enable(struct drm_i915_private *dev_priv,
+			       struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	u32 val;
+
+	/* 1. Enable DPLL power in DPLL_ENABLE. */
+	val = I915_READ(CNL_DPLL_ENABLE(id));
+	val |= PLL_POWER_ENABLE;
+	I915_WRITE(CNL_DPLL_ENABLE(id), val);
+
+	/* 2. Wait for DPLL power state enabled in DPLL_ENABLE. */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    CNL_DPLL_ENABLE(id),
+				    PLL_POWER_STATE,
+				    PLL_POWER_STATE,
+				    5))
+		DRM_ERROR("PLL %d Power not enabled\n", id);
+
+	/*
+	 * 3. Configure DPLL_CFGCR0 to set SSC enable/disable,
+	 * select DP mode, and set DP link rate.
+	 */
+	val = pll->state.hw_state.cfgcr0;
+	I915_WRITE(CNL_DPLL_CFGCR0(id), val);
+
+	/* 4. Reab back to ensure writes completed */
+	POSTING_READ(CNL_DPLL_CFGCR0(id));
+
+	/* 3. Configure DPLL_CFGCR0 */
+	/* Avoid touch CFGCR1 if HDMI mode is not enabled */
+	if (pll->state.hw_state.cfgcr0 & DPLL_CFGCR0_HDMI_MODE) {
+		val = pll->state.hw_state.cfgcr1;
+		I915_WRITE(CNL_DPLL_CFGCR1(id), val);
+		/* 4. Reab back to ensure writes completed */
+		POSTING_READ(CNL_DPLL_CFGCR1(id));
+	}
+
+	/*
+	 * 5. If the frequency will result in a change to the voltage
+	 * requirement, follow the Display Voltage Frequency Switching
+	 * Sequence Before Frequency Change
+	 *
+	 * Note: DVFS is actually handled via the cdclk code paths,
+	 * hence we do nothing here.
+	 */
+
+	/* 6. Enable DPLL in DPLL_ENABLE. */
+	val = I915_READ(CNL_DPLL_ENABLE(id));
+	val |= PLL_ENABLE;
+	I915_WRITE(CNL_DPLL_ENABLE(id), val);
+
+	/* 7. Wait for PLL lock status in DPLL_ENABLE. */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    CNL_DPLL_ENABLE(id),
+				    PLL_LOCK,
+				    PLL_LOCK,
+				    5))
+		DRM_ERROR("PLL %d not locked\n", id);
+
+	/*
+	 * 8. If the frequency will result in a change to the voltage
+	 * requirement, follow the Display Voltage Frequency Switching
+	 * Sequence After Frequency Change
+	 *
+	 * Note: DVFS is actually handled via the cdclk code paths,
+	 * hence we do nothing here.
+	 */
+
+	/*
+	 * 9. turn on the clock for the DDI and map the DPLL to the DDI
+	 * Done at intel_ddi_clk_select
+	 */
+}
+
+static void cnl_ddi_pll_disable(struct drm_i915_private *dev_priv,
+				struct intel_shared_dpll *pll)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	u32 val;
+
+	/*
+	 * 1. Configure DPCLKA_CFGCR0 to turn off the clock for the DDI.
+	 * Done at intel_ddi_post_disable
+	 */
+
+	/*
+	 * 2. If the frequency will result in a change to the voltage
+	 * requirement, follow the Display Voltage Frequency Switching
+	 * Sequence Before Frequency Change
+	 *
+	 * Note: DVFS is actually handled via the cdclk code paths,
+	 * hence we do nothing here.
+	 */
+
+	/* 3. Disable DPLL through DPLL_ENABLE. */
+	val = I915_READ(CNL_DPLL_ENABLE(id));
+	val &= ~PLL_ENABLE;
+	I915_WRITE(CNL_DPLL_ENABLE(id), val);
+
+	/* 4. Wait for PLL not locked status in DPLL_ENABLE. */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    CNL_DPLL_ENABLE(id),
+				    PLL_LOCK,
+				    0,
+				    5))
+		DRM_ERROR("PLL %d locked\n", id);
+
+	/*
+	 * 5. If the frequency will result in a change to the voltage
+	 * requirement, follow the Display Voltage Frequency Switching
+	 * Sequence After Frequency Change
+	 *
+	 * Note: DVFS is actually handled via the cdclk code paths,
+	 * hence we do nothing here.
+	 */
+
+	/* 6. Disable DPLL power in DPLL_ENABLE. */
+	val = I915_READ(CNL_DPLL_ENABLE(id));
+	val &= ~PLL_POWER_ENABLE;
+	I915_WRITE(CNL_DPLL_ENABLE(id), val);
+
+	/* 7. Wait for DPLL power state disabled in DPLL_ENABLE. */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    CNL_DPLL_ENABLE(id),
+				    PLL_POWER_STATE,
+				    0,
+				    5))
+		DRM_ERROR("PLL %d Power not disabled\n", id);
+}
+
+static bool cnl_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
+				     struct intel_shared_dpll *pll,
+				     struct intel_dpll_hw_state *hw_state)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	intel_wakeref_t wakeref;
+	u32 val;
+	bool ret;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	ret = false;
+
+	val = I915_READ(CNL_DPLL_ENABLE(id));
+	if (!(val & PLL_ENABLE))
+		goto out;
+
+	val = I915_READ(CNL_DPLL_CFGCR0(id));
+	hw_state->cfgcr0 = val;
+
+	/* avoid reading back stale values if HDMI mode is not enabled */
+	if (val & DPLL_CFGCR0_HDMI_MODE) {
+		hw_state->cfgcr1 = I915_READ(CNL_DPLL_CFGCR1(id));
+	}
+	ret = true;
+
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+
+	return ret;
+}
+
+static void cnl_wrpll_get_multipliers(int bestdiv, int *pdiv,
+				      int *qdiv, int *kdiv)
+{
+	/* even dividers */
+	if (bestdiv % 2 == 0) {
+		if (bestdiv == 2) {
+			*pdiv = 2;
+			*qdiv = 1;
+			*kdiv = 1;
+		} else if (bestdiv % 4 == 0) {
+			*pdiv = 2;
+			*qdiv = bestdiv / 4;
+			*kdiv = 2;
+		} else if (bestdiv % 6 == 0) {
+			*pdiv = 3;
+			*qdiv = bestdiv / 6;
+			*kdiv = 2;
+		} else if (bestdiv % 5 == 0) {
+			*pdiv = 5;
+			*qdiv = bestdiv / 10;
+			*kdiv = 2;
+		} else if (bestdiv % 14 == 0) {
+			*pdiv = 7;
+			*qdiv = bestdiv / 14;
+			*kdiv = 2;
+		}
+	} else {
+		if (bestdiv == 3 || bestdiv == 5 || bestdiv == 7) {
+			*pdiv = bestdiv;
+			*qdiv = 1;
+			*kdiv = 1;
+		} else { /* 9, 15, 21 */
+			*pdiv = bestdiv / 3;
+			*qdiv = 1;
+			*kdiv = 3;
+		}
+	}
+}
+
+static void cnl_wrpll_params_populate(struct skl_wrpll_params *params,
+				      u32 dco_freq, u32 ref_freq,
+				      int pdiv, int qdiv, int kdiv)
+{
+	u32 dco;
+
+	switch (kdiv) {
+	case 1:
+		params->kdiv = 1;
+		break;
+	case 2:
+		params->kdiv = 2;
+		break;
+	case 3:
+		params->kdiv = 4;
+		break;
+	default:
+		WARN(1, "Incorrect KDiv\n");
+	}
+
+	switch (pdiv) {
+	case 2:
+		params->pdiv = 1;
+		break;
+	case 3:
+		params->pdiv = 2;
+		break;
+	case 5:
+		params->pdiv = 4;
+		break;
+	case 7:
+		params->pdiv = 8;
+		break;
+	default:
+		WARN(1, "Incorrect PDiv\n");
+	}
+
+	WARN_ON(kdiv != 2 && qdiv != 1);
+
+	params->qdiv_ratio = qdiv;
+	params->qdiv_mode = (qdiv == 1) ? 0 : 1;
+
+	dco = div_u64((u64)dco_freq << 15, ref_freq);
+
+	params->dco_integer = dco >> 15;
+	params->dco_fraction = dco & 0x7fff;
+}
+
+int cnl_hdmi_pll_ref_clock(struct drm_i915_private *dev_priv)
+{
+	int ref_clock = dev_priv->cdclk.hw.ref;
+
+	/*
+	 * For ICL+, the spec states: if reference frequency is 38.4,
+	 * use 19.2 because the DPLL automatically divides that by 2.
+	 */
+	if (INTEL_GEN(dev_priv) >= 11 && ref_clock == 38400)
+		ref_clock = 19200;
+
+	return ref_clock;
+}
+
+static bool
+cnl_ddi_calculate_wrpll(struct intel_crtc_state *crtc_state,
+			struct skl_wrpll_params *wrpll_params)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	u32 afe_clock = crtc_state->port_clock * 5;
+	u32 ref_clock;
+	u32 dco_min = 7998000;
+	u32 dco_max = 10000000;
+	u32 dco_mid = (dco_min + dco_max) / 2;
+	static const int dividers[] = {  2,  4,  6,  8, 10, 12,  14,  16,
+					 18, 20, 24, 28, 30, 32,  36,  40,
+					 42, 44, 48, 50, 52, 54,  56,  60,
+					 64, 66, 68, 70, 72, 76,  78,  80,
+					 84, 88, 90, 92, 96, 98, 100, 102,
+					  3,  5,  7,  9, 15, 21 };
+	u32 dco, best_dco = 0, dco_centrality = 0;
+	u32 best_dco_centrality = U32_MAX; /* Spec meaning of 999999 MHz */
+	int d, best_div = 0, pdiv = 0, qdiv = 0, kdiv = 0;
+
+	for (d = 0; d < ARRAY_SIZE(dividers); d++) {
+		dco = afe_clock * dividers[d];
+
+		if ((dco <= dco_max) && (dco >= dco_min)) {
+			dco_centrality = abs(dco - dco_mid);
+
+			if (dco_centrality < best_dco_centrality) {
+				best_dco_centrality = dco_centrality;
+				best_div = dividers[d];
+				best_dco = dco;
+			}
+		}
+	}
+
+	if (best_div == 0)
+		return false;
+
+	cnl_wrpll_get_multipliers(best_div, &pdiv, &qdiv, &kdiv);
+
+	ref_clock = cnl_hdmi_pll_ref_clock(dev_priv);
+
+	cnl_wrpll_params_populate(wrpll_params, best_dco, ref_clock,
+				  pdiv, qdiv, kdiv);
+
+	return true;
+}
+
+static bool cnl_ddi_hdmi_pll_dividers(struct intel_crtc_state *crtc_state)
+{
+	u32 cfgcr0, cfgcr1;
+	struct skl_wrpll_params wrpll_params = { 0, };
+
+	cfgcr0 = DPLL_CFGCR0_HDMI_MODE;
+
+	if (!cnl_ddi_calculate_wrpll(crtc_state, &wrpll_params))
+		return false;
+
+	cfgcr0 |= DPLL_CFGCR0_DCO_FRACTION(wrpll_params.dco_fraction) |
+		wrpll_params.dco_integer;
+
+	cfgcr1 = DPLL_CFGCR1_QDIV_RATIO(wrpll_params.qdiv_ratio) |
+		DPLL_CFGCR1_QDIV_MODE(wrpll_params.qdiv_mode) |
+		DPLL_CFGCR1_KDIV(wrpll_params.kdiv) |
+		DPLL_CFGCR1_PDIV(wrpll_params.pdiv) |
+		DPLL_CFGCR1_CENTRAL_FREQ;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	crtc_state->dpll_hw_state.cfgcr0 = cfgcr0;
+	crtc_state->dpll_hw_state.cfgcr1 = cfgcr1;
+	return true;
+}
+
+static bool
+cnl_ddi_dp_set_dpll_hw_state(struct intel_crtc_state *crtc_state)
+{
+	u32 cfgcr0;
+
+	cfgcr0 = DPLL_CFGCR0_SSC_ENABLE;
+
+	switch (crtc_state->port_clock / 2) {
+	case 81000:
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_810;
+		break;
+	case 135000:
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_1350;
+		break;
+	case 270000:
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_2700;
+		break;
+		/* eDP 1.4 rates */
+	case 162000:
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_1620;
+		break;
+	case 108000:
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_1080;
+		break;
+	case 216000:
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_2160;
+		break;
+	case 324000:
+		/* Some SKUs may require elevated I/O voltage to support this */
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_3240;
+		break;
+	case 405000:
+		/* Some SKUs may require elevated I/O voltage to support this */
+		cfgcr0 |= DPLL_CFGCR0_LINK_RATE_4050;
+		break;
+	}
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	crtc_state->dpll_hw_state.cfgcr0 = cfgcr0;
+
+	return true;
+}
+
+static struct intel_shared_dpll *
+cnl_get_dpll(struct intel_crtc_state *crtc_state,
+	     struct intel_encoder *encoder)
+{
+	struct intel_shared_dpll *pll;
+	bool bret;
+
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
+		bret = cnl_ddi_hdmi_pll_dividers(crtc_state);
+		if (!bret) {
+			DRM_DEBUG_KMS("Could not get HDMI pll dividers.\n");
+			return NULL;
+		}
+	} else if (intel_crtc_has_dp_encoder(crtc_state)) {
+		bret = cnl_ddi_dp_set_dpll_hw_state(crtc_state);
+		if (!bret) {
+			DRM_DEBUG_KMS("Could not set DP dpll HW state.\n");
+			return NULL;
+		}
+	} else {
+		DRM_DEBUG_KMS("Skip DPLL setup for output_types 0x%x\n",
+			      crtc_state->output_types);
+		return NULL;
+	}
+
+	pll = intel_find_shared_dpll(crtc_state,
+				     DPLL_ID_SKL_DPLL0,
+				     DPLL_ID_SKL_DPLL2);
+	if (!pll) {
+		DRM_DEBUG_KMS("No PLL selected\n");
+		return NULL;
+	}
+
+	intel_reference_shared_dpll(pll, crtc_state);
+
+	return pll;
+}
+
+static void cnl_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	DRM_DEBUG_KMS("dpll_hw_state: "
+		      "cfgcr0: 0x%x, cfgcr1: 0x%x\n",
+		      hw_state->cfgcr0,
+		      hw_state->cfgcr1);
+}
+
+static const struct intel_shared_dpll_funcs cnl_ddi_pll_funcs = {
+	.enable = cnl_ddi_pll_enable,
+	.disable = cnl_ddi_pll_disable,
+	.get_hw_state = cnl_ddi_pll_get_hw_state,
+};
+
+static const struct dpll_info cnl_plls[] = {
+	{ "DPLL 0", &cnl_ddi_pll_funcs, DPLL_ID_SKL_DPLL0, 0 },
+	{ "DPLL 1", &cnl_ddi_pll_funcs, DPLL_ID_SKL_DPLL1, 0 },
+	{ "DPLL 2", &cnl_ddi_pll_funcs, DPLL_ID_SKL_DPLL2, 0 },
+	{ },
+};
+
+static const struct intel_dpll_mgr cnl_pll_mgr = {
+	.dpll_info = cnl_plls,
+	.get_dpll = cnl_get_dpll,
+	.dump_hw_state = cnl_dump_hw_state,
+};
+
+struct icl_combo_pll_params {
+	int clock;
+	struct skl_wrpll_params wrpll;
+};
+
+/*
+ * These values alrea already adjusted: they're the bits we write to the
+ * registers, not the logical values.
+ */
+static const struct icl_combo_pll_params icl_dp_combo_pll_24MHz_values[] = {
+	{ 540000,
+	  { .dco_integer = 0x151, .dco_fraction = 0x4000,		/* [0]: 5.4 */
+	    .pdiv = 0x2 /* 3 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 270000,
+	  { .dco_integer = 0x151, .dco_fraction = 0x4000,		/* [1]: 2.7 */
+	    .pdiv = 0x2 /* 3 */, .kdiv = 2, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 162000,
+	  { .dco_integer = 0x151, .dco_fraction = 0x4000,		/* [2]: 1.62 */
+	    .pdiv = 0x4 /* 5 */, .kdiv = 2, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 324000,
+	  { .dco_integer = 0x151, .dco_fraction = 0x4000,		/* [3]: 3.24 */
+	    .pdiv = 0x4 /* 5 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 216000,
+	  { .dco_integer = 0x168, .dco_fraction = 0x0000,		/* [4]: 2.16 */
+	    .pdiv = 0x1 /* 2 */, .kdiv = 2, .qdiv_mode = 1, .qdiv_ratio = 2, }, },
+	{ 432000,
+	  { .dco_integer = 0x168, .dco_fraction = 0x0000,		/* [5]: 4.32 */
+	    .pdiv = 0x1 /* 2 */, .kdiv = 2, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 648000,
+	  { .dco_integer = 0x195, .dco_fraction = 0x0000,		/* [6]: 6.48 */
+	    .pdiv = 0x2 /* 3 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 810000,
+	  { .dco_integer = 0x151, .dco_fraction = 0x4000,		/* [7]: 8.1 */
+	    .pdiv = 0x1 /* 2 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+};
+
+
+/* Also used for 38.4 MHz values. */
+static const struct icl_combo_pll_params icl_dp_combo_pll_19_2MHz_values[] = {
+	{ 540000,
+	  { .dco_integer = 0x1A5, .dco_fraction = 0x7000,		/* [0]: 5.4 */
+	    .pdiv = 0x2 /* 3 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 270000,
+	  { .dco_integer = 0x1A5, .dco_fraction = 0x7000,		/* [1]: 2.7 */
+	    .pdiv = 0x2 /* 3 */, .kdiv = 2, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 162000,
+	  { .dco_integer = 0x1A5, .dco_fraction = 0x7000,		/* [2]: 1.62 */
+	    .pdiv = 0x4 /* 5 */, .kdiv = 2, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 324000,
+	  { .dco_integer = 0x1A5, .dco_fraction = 0x7000,		/* [3]: 3.24 */
+	    .pdiv = 0x4 /* 5 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 216000,
+	  { .dco_integer = 0x1C2, .dco_fraction = 0x0000,		/* [4]: 2.16 */
+	    .pdiv = 0x1 /* 2 */, .kdiv = 2, .qdiv_mode = 1, .qdiv_ratio = 2, }, },
+	{ 432000,
+	  { .dco_integer = 0x1C2, .dco_fraction = 0x0000,		/* [5]: 4.32 */
+	    .pdiv = 0x1 /* 2 */, .kdiv = 2, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 648000,
+	  { .dco_integer = 0x1FA, .dco_fraction = 0x2000,		/* [6]: 6.48 */
+	    .pdiv = 0x2 /* 3 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+	{ 810000,
+	  { .dco_integer = 0x1A5, .dco_fraction = 0x7000,		/* [7]: 8.1 */
+	    .pdiv = 0x1 /* 2 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0, }, },
+};
+
+static const struct skl_wrpll_params icl_tbt_pll_24MHz_values = {
+	.dco_integer = 0x151, .dco_fraction = 0x4000,
+	.pdiv = 0x4 /* 5 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0,
+};
+
+static const struct skl_wrpll_params icl_tbt_pll_19_2MHz_values = {
+	.dco_integer = 0x1A5, .dco_fraction = 0x7000,
+	.pdiv = 0x4 /* 5 */, .kdiv = 1, .qdiv_mode = 0, .qdiv_ratio = 0,
+};
+
+static bool icl_calc_dp_combo_pll(struct intel_crtc_state *crtc_state,
+				  struct skl_wrpll_params *pll_params)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	const struct icl_combo_pll_params *params =
+		dev_priv->cdclk.hw.ref == 24000 ?
+		icl_dp_combo_pll_24MHz_values :
+		icl_dp_combo_pll_19_2MHz_values;
+	int clock = crtc_state->port_clock;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(icl_dp_combo_pll_24MHz_values); i++) {
+		if (clock == params[i].clock) {
+			*pll_params = params[i].wrpll;
+			return true;
+		}
+	}
+
+	MISSING_CASE(clock);
+	return false;
+}
+
+static bool icl_calc_tbt_pll(struct intel_crtc_state *crtc_state,
+			     struct skl_wrpll_params *pll_params)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	*pll_params = dev_priv->cdclk.hw.ref == 24000 ?
+			icl_tbt_pll_24MHz_values : icl_tbt_pll_19_2MHz_values;
+	return true;
+}
+
+static bool icl_calc_dpll_state(struct intel_crtc_state *crtc_state,
+				struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	u32 cfgcr0, cfgcr1;
+	struct skl_wrpll_params pll_params = { 0 };
+	bool ret;
+
+	if (intel_port_is_tc(dev_priv, encoder->port))
+		ret = icl_calc_tbt_pll(crtc_state, &pll_params);
+	else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI) ||
+		 intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
+		ret = cnl_ddi_calculate_wrpll(crtc_state, &pll_params);
+	else
+		ret = icl_calc_dp_combo_pll(crtc_state, &pll_params);
+
+	if (!ret)
+		return false;
+
+	cfgcr0 = DPLL_CFGCR0_DCO_FRACTION(pll_params.dco_fraction) |
+		 pll_params.dco_integer;
+
+	cfgcr1 = DPLL_CFGCR1_QDIV_RATIO(pll_params.qdiv_ratio) |
+		 DPLL_CFGCR1_QDIV_MODE(pll_params.qdiv_mode) |
+		 DPLL_CFGCR1_KDIV(pll_params.kdiv) |
+		 DPLL_CFGCR1_PDIV(pll_params.pdiv) |
+		 DPLL_CFGCR1_CENTRAL_FREQ_8400;
+
+	memset(&crtc_state->dpll_hw_state, 0,
+	       sizeof(crtc_state->dpll_hw_state));
+
+	crtc_state->dpll_hw_state.cfgcr0 = cfgcr0;
+	crtc_state->dpll_hw_state.cfgcr1 = cfgcr1;
+
+	return true;
+}
+
+
+static enum tc_port icl_pll_id_to_tc_port(enum intel_dpll_id id)
+{
+	return id - DPLL_ID_ICL_MGPLL1;
+}
+
+enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port)
+{
+	return tc_port + DPLL_ID_ICL_MGPLL1;
+}
+
+static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc,
+				     u32 *target_dco_khz,
+				     struct intel_dpll_hw_state *state)
+{
+	u32 dco_min_freq, dco_max_freq;
+	int div1_vals[] = {7, 5, 3, 2};
+	unsigned int i;
+	int div2;
+
+	dco_min_freq = is_dp ? 8100000 : use_ssc ? 8000000 : 7992000;
+	dco_max_freq = is_dp ? 8100000 : 10000000;
+
+	for (i = 0; i < ARRAY_SIZE(div1_vals); i++) {
+		int div1 = div1_vals[i];
+
+		for (div2 = 10; div2 > 0; div2--) {
+			int dco = div1 * div2 * clock_khz * 5;
+			int a_divratio, tlinedrv, inputsel;
+			u32 hsdiv;
+
+			if (dco < dco_min_freq || dco > dco_max_freq)
+				continue;
+
+			if (div2 >= 2) {
+				a_divratio = is_dp ? 10 : 5;
+				tlinedrv = 2;
+			} else {
+				a_divratio = 5;
+				tlinedrv = 0;
+			}
+			inputsel = is_dp ? 0 : 1;
+
+			switch (div1) {
+			default:
+				MISSING_CASE(div1);
+				/* fall through */
+			case 2:
+				hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_2;
+				break;
+			case 3:
+				hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_3;
+				break;
+			case 5:
+				hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_5;
+				break;
+			case 7:
+				hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_7;
+				break;
+			}
+
+			*target_dco_khz = dco;
+
+			state->mg_refclkin_ctl = MG_REFCLKIN_CTL_OD_2_MUX(1);
+
+			state->mg_clktop2_coreclkctl1 =
+				MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO(a_divratio);
+
+			state->mg_clktop2_hsclkctl =
+				MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL(tlinedrv) |
+				MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL(inputsel) |
+				hsdiv |
+				MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO(div2);
+
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/*
+ * The specification for this function uses real numbers, so the math had to be
+ * adapted to integer-only calculation, that's why it looks so different.
+ */
+static bool icl_calc_mg_pll_state(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	struct intel_dpll_hw_state *pll_state = &crtc_state->dpll_hw_state;
+	int refclk_khz = dev_priv->cdclk.hw.ref;
+	int clock = crtc_state->port_clock;
+	u32 dco_khz, m1div, m2div_int, m2div_rem, m2div_frac;
+	u32 iref_ndiv, iref_trim, iref_pulse_w;
+	u32 prop_coeff, int_coeff;
+	u32 tdc_targetcnt, feedfwgain;
+	u64 ssc_stepsize, ssc_steplen, ssc_steplog;
+	u64 tmp;
+	bool use_ssc = false;
+	bool is_dp = !intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI);
+
+	memset(pll_state, 0, sizeof(*pll_state));
+
+	if (!icl_mg_pll_find_divisors(clock, is_dp, use_ssc, &dco_khz,
+				      pll_state)) {
+		DRM_DEBUG_KMS("Failed to find divisors for clock %d\n", clock);
+		return false;
+	}
+
+	m1div = 2;
+	m2div_int = dco_khz / (refclk_khz * m1div);
+	if (m2div_int > 255) {
+		m1div = 4;
+		m2div_int = dco_khz / (refclk_khz * m1div);
+		if (m2div_int > 255) {
+			DRM_DEBUG_KMS("Failed to find mdiv for clock %d\n",
+				      clock);
+			return false;
+		}
+	}
+	m2div_rem = dco_khz % (refclk_khz * m1div);
+
+	tmp = (u64)m2div_rem * (1 << 22);
+	do_div(tmp, refclk_khz * m1div);
+	m2div_frac = tmp;
+
+	switch (refclk_khz) {
+	case 19200:
+		iref_ndiv = 1;
+		iref_trim = 28;
+		iref_pulse_w = 1;
+		break;
+	case 24000:
+		iref_ndiv = 1;
+		iref_trim = 25;
+		iref_pulse_w = 2;
+		break;
+	case 38400:
+		iref_ndiv = 2;
+		iref_trim = 28;
+		iref_pulse_w = 1;
+		break;
+	default:
+		MISSING_CASE(refclk_khz);
+		return false;
+	}
+
+	/*
+	 * tdc_res = 0.000003
+	 * tdc_targetcnt = int(2 / (tdc_res * 8 * 50 * 1.1) / refclk_mhz + 0.5)
+	 *
+	 * The multiplication by 1000 is due to refclk MHz to KHz conversion. It
+	 * was supposed to be a division, but we rearranged the operations of
+	 * the formula to avoid early divisions so we don't multiply the
+	 * rounding errors.
+	 *
+	 * 0.000003 * 8 * 50 * 1.1 = 0.00132, also known as 132 / 100000, which
+	 * we also rearrange to work with integers.
+	 *
+	 * The 0.5 transformed to 5 results in a multiplication by 10 and the
+	 * last division by 10.
+	 */
+	tdc_targetcnt = (2 * 1000 * 100000 * 10 / (132 * refclk_khz) + 5) / 10;
+
+	/*
+	 * Here we divide dco_khz by 10 in order to allow the dividend to fit in
+	 * 32 bits. That's not a problem since we round the division down
+	 * anyway.
+	 */
+	feedfwgain = (use_ssc || m2div_rem > 0) ?
+		m1div * 1000000 * 100 / (dco_khz * 3 / 10) : 0;
+
+	if (dco_khz >= 9000000) {
+		prop_coeff = 5;
+		int_coeff = 10;
+	} else {
+		prop_coeff = 4;
+		int_coeff = 8;
+	}
+
+	if (use_ssc) {
+		tmp = mul_u32_u32(dco_khz, 47 * 32);
+		do_div(tmp, refclk_khz * m1div * 10000);
+		ssc_stepsize = tmp;
+
+		tmp = mul_u32_u32(dco_khz, 1000);
+		ssc_steplen = DIV_ROUND_UP_ULL(tmp, 32 * 2 * 32);
+	} else {
+		ssc_stepsize = 0;
+		ssc_steplen = 0;
+	}
+	ssc_steplog = 4;
+
+	pll_state->mg_pll_div0 = (m2div_rem > 0 ? MG_PLL_DIV0_FRACNEN_H : 0) |
+				  MG_PLL_DIV0_FBDIV_FRAC(m2div_frac) |
+				  MG_PLL_DIV0_FBDIV_INT(m2div_int);
+
+	pll_state->mg_pll_div1 = MG_PLL_DIV1_IREF_NDIVRATIO(iref_ndiv) |
+				 MG_PLL_DIV1_DITHER_DIV_2 |
+				 MG_PLL_DIV1_NDIVRATIO(1) |
+				 MG_PLL_DIV1_FBPREDIV(m1div);
+
+	pll_state->mg_pll_lf = MG_PLL_LF_TDCTARGETCNT(tdc_targetcnt) |
+			       MG_PLL_LF_AFCCNTSEL_512 |
+			       MG_PLL_LF_GAINCTRL(1) |
+			       MG_PLL_LF_INT_COEFF(int_coeff) |
+			       MG_PLL_LF_PROP_COEFF(prop_coeff);
+
+	pll_state->mg_pll_frac_lock = MG_PLL_FRAC_LOCK_TRUELOCK_CRIT_32 |
+				      MG_PLL_FRAC_LOCK_EARLYLOCK_CRIT_32 |
+				      MG_PLL_FRAC_LOCK_LOCKTHRESH(10) |
+				      MG_PLL_FRAC_LOCK_DCODITHEREN |
+				      MG_PLL_FRAC_LOCK_FEEDFWRDGAIN(feedfwgain);
+	if (use_ssc || m2div_rem > 0)
+		pll_state->mg_pll_frac_lock |= MG_PLL_FRAC_LOCK_FEEDFWRDCAL_EN;
+
+	pll_state->mg_pll_ssc = (use_ssc ? MG_PLL_SSC_EN : 0) |
+				MG_PLL_SSC_TYPE(2) |
+				MG_PLL_SSC_STEPLENGTH(ssc_steplen) |
+				MG_PLL_SSC_STEPNUM(ssc_steplog) |
+				MG_PLL_SSC_FLLEN |
+				MG_PLL_SSC_STEPSIZE(ssc_stepsize);
+
+	pll_state->mg_pll_tdc_coldst_bias = MG_PLL_TDC_COLDST_COLDSTART |
+					    MG_PLL_TDC_COLDST_IREFINT_EN |
+					    MG_PLL_TDC_COLDST_REFBIAS_START_PULSE_W(iref_pulse_w) |
+					    MG_PLL_TDC_TDCOVCCORR_EN |
+					    MG_PLL_TDC_TDCSEL(3);
+
+	pll_state->mg_pll_bias = MG_PLL_BIAS_BIAS_GB_SEL(3) |
+				 MG_PLL_BIAS_INIT_DCOAMP(0x3F) |
+				 MG_PLL_BIAS_BIAS_BONUS(10) |
+				 MG_PLL_BIAS_BIASCAL_EN |
+				 MG_PLL_BIAS_CTRIM(12) |
+				 MG_PLL_BIAS_VREF_RDAC(4) |
+				 MG_PLL_BIAS_IREFTRIM(iref_trim);
+
+	if (refclk_khz == 38400) {
+		pll_state->mg_pll_tdc_coldst_bias_mask = MG_PLL_TDC_COLDST_COLDSTART;
+		pll_state->mg_pll_bias_mask = 0;
+	} else {
+		pll_state->mg_pll_tdc_coldst_bias_mask = -1U;
+		pll_state->mg_pll_bias_mask = -1U;
+	}
+
+	pll_state->mg_pll_tdc_coldst_bias &= pll_state->mg_pll_tdc_coldst_bias_mask;
+	pll_state->mg_pll_bias &= pll_state->mg_pll_bias_mask;
+
+	return true;
+}
+
+static struct intel_shared_dpll *
+icl_get_dpll(struct intel_crtc_state *crtc_state,
+	     struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	struct intel_digital_port *intel_dig_port;
+	struct intel_shared_dpll *pll;
+	enum port port = encoder->port;
+	enum intel_dpll_id min, max;
+	bool ret;
+
+	if (intel_port_is_combophy(dev_priv, port)) {
+		min = DPLL_ID_ICL_DPLL0;
+		max = DPLL_ID_ICL_DPLL1;
+		ret = icl_calc_dpll_state(crtc_state, encoder);
+	} else if (intel_port_is_tc(dev_priv, port)) {
+		if (encoder->type == INTEL_OUTPUT_DP_MST) {
+			struct intel_dp_mst_encoder *mst_encoder;
+
+			mst_encoder = enc_to_mst(&encoder->base);
+			intel_dig_port = mst_encoder->primary;
+		} else {
+			intel_dig_port = enc_to_dig_port(&encoder->base);
+		}
+
+		if (intel_dig_port->tc_type == TC_PORT_TBT) {
+			min = DPLL_ID_ICL_TBTPLL;
+			max = min;
+			ret = icl_calc_dpll_state(crtc_state, encoder);
+		} else {
+			enum tc_port tc_port;
+
+			tc_port = intel_port_to_tc(dev_priv, port);
+			min = icl_tc_port_to_pll_id(tc_port);
+			max = min;
+			ret = icl_calc_mg_pll_state(crtc_state);
+		}
+	} else {
+		MISSING_CASE(port);
+		return NULL;
+	}
+
+	if (!ret) {
+		DRM_DEBUG_KMS("Could not calculate PLL state.\n");
+		return NULL;
+	}
+
+
+	pll = intel_find_shared_dpll(crtc_state, min, max);
+	if (!pll) {
+		DRM_DEBUG_KMS("No PLL selected\n");
+		return NULL;
+	}
+
+	intel_reference_shared_dpll(pll, crtc_state);
+
+	return pll;
+}
+
+static bool mg_pll_get_hw_state(struct drm_i915_private *dev_priv,
+				struct intel_shared_dpll *pll,
+				struct intel_dpll_hw_state *hw_state)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	enum tc_port tc_port = icl_pll_id_to_tc_port(id);
+	intel_wakeref_t wakeref;
+	bool ret = false;
+	u32 val;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(MG_PLL_ENABLE(tc_port));
+	if (!(val & PLL_ENABLE))
+		goto out;
+
+	hw_state->mg_refclkin_ctl = I915_READ(MG_REFCLKIN_CTL(tc_port));
+	hw_state->mg_refclkin_ctl &= MG_REFCLKIN_CTL_OD_2_MUX_MASK;
+
+	hw_state->mg_clktop2_coreclkctl1 =
+		I915_READ(MG_CLKTOP2_CORECLKCTL1(tc_port));
+	hw_state->mg_clktop2_coreclkctl1 &=
+		MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
+
+	hw_state->mg_clktop2_hsclkctl =
+		I915_READ(MG_CLKTOP2_HSCLKCTL(tc_port));
+	hw_state->mg_clktop2_hsclkctl &=
+		MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
+		MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
+		MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
+		MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK;
+
+	hw_state->mg_pll_div0 = I915_READ(MG_PLL_DIV0(tc_port));
+	hw_state->mg_pll_div1 = I915_READ(MG_PLL_DIV1(tc_port));
+	hw_state->mg_pll_lf = I915_READ(MG_PLL_LF(tc_port));
+	hw_state->mg_pll_frac_lock = I915_READ(MG_PLL_FRAC_LOCK(tc_port));
+	hw_state->mg_pll_ssc = I915_READ(MG_PLL_SSC(tc_port));
+
+	hw_state->mg_pll_bias = I915_READ(MG_PLL_BIAS(tc_port));
+	hw_state->mg_pll_tdc_coldst_bias =
+		I915_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
+
+	if (dev_priv->cdclk.hw.ref == 38400) {
+		hw_state->mg_pll_tdc_coldst_bias_mask = MG_PLL_TDC_COLDST_COLDSTART;
+		hw_state->mg_pll_bias_mask = 0;
+	} else {
+		hw_state->mg_pll_tdc_coldst_bias_mask = -1U;
+		hw_state->mg_pll_bias_mask = -1U;
+	}
+
+	hw_state->mg_pll_tdc_coldst_bias &= hw_state->mg_pll_tdc_coldst_bias_mask;
+	hw_state->mg_pll_bias &= hw_state->mg_pll_bias_mask;
+
+	ret = true;
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+	return ret;
+}
+
+static bool icl_pll_get_hw_state(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll,
+				 struct intel_dpll_hw_state *hw_state,
+				 i915_reg_t enable_reg)
+{
+	const enum intel_dpll_id id = pll->info->id;
+	intel_wakeref_t wakeref;
+	bool ret = false;
+	u32 val;
+
+	wakeref = intel_display_power_get_if_enabled(dev_priv,
+						     POWER_DOMAIN_DISPLAY_CORE);
+	if (!wakeref)
+		return false;
+
+	val = I915_READ(enable_reg);
+	if (!(val & PLL_ENABLE))
+		goto out;
+
+	hw_state->cfgcr0 = I915_READ(ICL_DPLL_CFGCR0(id));
+	hw_state->cfgcr1 = I915_READ(ICL_DPLL_CFGCR1(id));
+
+	ret = true;
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
+	return ret;
+}
+
+static bool combo_pll_get_hw_state(struct drm_i915_private *dev_priv,
+				   struct intel_shared_dpll *pll,
+				   struct intel_dpll_hw_state *hw_state)
+{
+	return icl_pll_get_hw_state(dev_priv, pll, hw_state,
+				    CNL_DPLL_ENABLE(pll->info->id));
+}
+
+static bool tbt_pll_get_hw_state(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll,
+				 struct intel_dpll_hw_state *hw_state)
+{
+	return icl_pll_get_hw_state(dev_priv, pll, hw_state, TBT_PLL_ENABLE);
+}
+
+static void icl_dpll_write(struct drm_i915_private *dev_priv,
+			   struct intel_shared_dpll *pll)
+{
+	struct intel_dpll_hw_state *hw_state = &pll->state.hw_state;
+	const enum intel_dpll_id id = pll->info->id;
+
+	I915_WRITE(ICL_DPLL_CFGCR0(id), hw_state->cfgcr0);
+	I915_WRITE(ICL_DPLL_CFGCR1(id), hw_state->cfgcr1);
+	POSTING_READ(ICL_DPLL_CFGCR1(id));
+}
+
+static void icl_mg_pll_write(struct drm_i915_private *dev_priv,
+			     struct intel_shared_dpll *pll)
+{
+	struct intel_dpll_hw_state *hw_state = &pll->state.hw_state;
+	enum tc_port tc_port = icl_pll_id_to_tc_port(pll->info->id);
+	u32 val;
+
+	/*
+	 * Some of the following registers have reserved fields, so program
+	 * these with RMW based on a mask. The mask can be fixed or generated
+	 * during the calc/readout phase if the mask depends on some other HW
+	 * state like refclk, see icl_calc_mg_pll_state().
+	 */
+	val = I915_READ(MG_REFCLKIN_CTL(tc_port));
+	val &= ~MG_REFCLKIN_CTL_OD_2_MUX_MASK;
+	val |= hw_state->mg_refclkin_ctl;
+	I915_WRITE(MG_REFCLKIN_CTL(tc_port), val);
+
+	val = I915_READ(MG_CLKTOP2_CORECLKCTL1(tc_port));
+	val &= ~MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
+	val |= hw_state->mg_clktop2_coreclkctl1;
+	I915_WRITE(MG_CLKTOP2_CORECLKCTL1(tc_port), val);
+
+	val = I915_READ(MG_CLKTOP2_HSCLKCTL(tc_port));
+	val &= ~(MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
+		 MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
+		 MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
+		 MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK);
+	val |= hw_state->mg_clktop2_hsclkctl;
+	I915_WRITE(MG_CLKTOP2_HSCLKCTL(tc_port), val);
+
+	I915_WRITE(MG_PLL_DIV0(tc_port), hw_state->mg_pll_div0);
+	I915_WRITE(MG_PLL_DIV1(tc_port), hw_state->mg_pll_div1);
+	I915_WRITE(MG_PLL_LF(tc_port), hw_state->mg_pll_lf);
+	I915_WRITE(MG_PLL_FRAC_LOCK(tc_port), hw_state->mg_pll_frac_lock);
+	I915_WRITE(MG_PLL_SSC(tc_port), hw_state->mg_pll_ssc);
+
+	val = I915_READ(MG_PLL_BIAS(tc_port));
+	val &= ~hw_state->mg_pll_bias_mask;
+	val |= hw_state->mg_pll_bias;
+	I915_WRITE(MG_PLL_BIAS(tc_port), val);
+
+	val = I915_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
+	val &= ~hw_state->mg_pll_tdc_coldst_bias_mask;
+	val |= hw_state->mg_pll_tdc_coldst_bias;
+	I915_WRITE(MG_PLL_TDC_COLDST_BIAS(tc_port), val);
+
+	POSTING_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
+}
+
+static void icl_pll_power_enable(struct drm_i915_private *dev_priv,
+				 struct intel_shared_dpll *pll,
+				 i915_reg_t enable_reg)
+{
+	u32 val;
+
+	val = I915_READ(enable_reg);
+	val |= PLL_POWER_ENABLE;
+	I915_WRITE(enable_reg, val);
+
+	/*
+	 * The spec says we need to "wait" but it also says it should be
+	 * immediate.
+	 */
+	if (intel_wait_for_register(&dev_priv->uncore, enable_reg,
+				    PLL_POWER_STATE, PLL_POWER_STATE, 1))
+		DRM_ERROR("PLL %d Power not enabled\n", pll->info->id);
+}
+
+static void icl_pll_enable(struct drm_i915_private *dev_priv,
+			   struct intel_shared_dpll *pll,
+			   i915_reg_t enable_reg)
+{
+	u32 val;
+
+	val = I915_READ(enable_reg);
+	val |= PLL_ENABLE;
+	I915_WRITE(enable_reg, val);
+
+	/* Timeout is actually 600us. */
+	if (intel_wait_for_register(&dev_priv->uncore, enable_reg,
+				    PLL_LOCK, PLL_LOCK, 1))
+		DRM_ERROR("PLL %d not locked\n", pll->info->id);
+}
+
+static void combo_pll_enable(struct drm_i915_private *dev_priv,
+			     struct intel_shared_dpll *pll)
+{
+	i915_reg_t enable_reg = CNL_DPLL_ENABLE(pll->info->id);
+
+	icl_pll_power_enable(dev_priv, pll, enable_reg);
+
+	icl_dpll_write(dev_priv, pll);
+
+	/*
+	 * DVFS pre sequence would be here, but in our driver the cdclk code
+	 * paths should already be setting the appropriate voltage, hence we do
+	 * nothing here.
+	 */
+
+	icl_pll_enable(dev_priv, pll, enable_reg);
+
+	/* DVFS post sequence would be here. See the comment above. */
+}
+
+static void tbt_pll_enable(struct drm_i915_private *dev_priv,
+			   struct intel_shared_dpll *pll)
+{
+	icl_pll_power_enable(dev_priv, pll, TBT_PLL_ENABLE);
+
+	icl_dpll_write(dev_priv, pll);
+
+	/*
+	 * DVFS pre sequence would be here, but in our driver the cdclk code
+	 * paths should already be setting the appropriate voltage, hence we do
+	 * nothing here.
+	 */
+
+	icl_pll_enable(dev_priv, pll, TBT_PLL_ENABLE);
+
+	/* DVFS post sequence would be here. See the comment above. */
+}
+
+static void mg_pll_enable(struct drm_i915_private *dev_priv,
+			  struct intel_shared_dpll *pll)
+{
+	i915_reg_t enable_reg =
+		MG_PLL_ENABLE(icl_pll_id_to_tc_port(pll->info->id));
+
+	icl_pll_power_enable(dev_priv, pll, enable_reg);
+
+	icl_mg_pll_write(dev_priv, pll);
+
+	/*
+	 * DVFS pre sequence would be here, but in our driver the cdclk code
+	 * paths should already be setting the appropriate voltage, hence we do
+	 * nothing here.
+	 */
+
+	icl_pll_enable(dev_priv, pll, enable_reg);
+
+	/* DVFS post sequence would be here. See the comment above. */
+}
+
+static void icl_pll_disable(struct drm_i915_private *dev_priv,
+			    struct intel_shared_dpll *pll,
+			    i915_reg_t enable_reg)
+{
+	u32 val;
+
+	/* The first steps are done by intel_ddi_post_disable(). */
+
+	/*
+	 * DVFS pre sequence would be here, but in our driver the cdclk code
+	 * paths should already be setting the appropriate voltage, hence we do
+	 * nothign here.
+	 */
+
+	val = I915_READ(enable_reg);
+	val &= ~PLL_ENABLE;
+	I915_WRITE(enable_reg, val);
+
+	/* Timeout is actually 1us. */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    enable_reg, PLL_LOCK, 0, 1))
+		DRM_ERROR("PLL %d locked\n", pll->info->id);
+
+	/* DVFS post sequence would be here. See the comment above. */
+
+	val = I915_READ(enable_reg);
+	val &= ~PLL_POWER_ENABLE;
+	I915_WRITE(enable_reg, val);
+
+	/*
+	 * The spec says we need to "wait" but it also says it should be
+	 * immediate.
+	 */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    enable_reg, PLL_POWER_STATE, 0, 1))
+		DRM_ERROR("PLL %d Power not disabled\n", pll->info->id);
+}
+
+static void combo_pll_disable(struct drm_i915_private *dev_priv,
+			      struct intel_shared_dpll *pll)
+{
+	icl_pll_disable(dev_priv, pll, CNL_DPLL_ENABLE(pll->info->id));
+}
+
+static void tbt_pll_disable(struct drm_i915_private *dev_priv,
+			    struct intel_shared_dpll *pll)
+{
+	icl_pll_disable(dev_priv, pll, TBT_PLL_ENABLE);
+}
+
+static void mg_pll_disable(struct drm_i915_private *dev_priv,
+			   struct intel_shared_dpll *pll)
+{
+	i915_reg_t enable_reg =
+		MG_PLL_ENABLE(icl_pll_id_to_tc_port(pll->info->id));
+
+	icl_pll_disable(dev_priv, pll, enable_reg);
+}
+
+static void icl_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	DRM_DEBUG_KMS("dpll_hw_state: cfgcr0: 0x%x, cfgcr1: 0x%x, "
+		      "mg_refclkin_ctl: 0x%x, hg_clktop2_coreclkctl1: 0x%x, "
+		      "mg_clktop2_hsclkctl: 0x%x, mg_pll_div0: 0x%x, "
+		      "mg_pll_div2: 0x%x, mg_pll_lf: 0x%x, "
+		      "mg_pll_frac_lock: 0x%x, mg_pll_ssc: 0x%x, "
+		      "mg_pll_bias: 0x%x, mg_pll_tdc_coldst_bias: 0x%x\n",
+		      hw_state->cfgcr0, hw_state->cfgcr1,
+		      hw_state->mg_refclkin_ctl,
+		      hw_state->mg_clktop2_coreclkctl1,
+		      hw_state->mg_clktop2_hsclkctl,
+		      hw_state->mg_pll_div0,
+		      hw_state->mg_pll_div1,
+		      hw_state->mg_pll_lf,
+		      hw_state->mg_pll_frac_lock,
+		      hw_state->mg_pll_ssc,
+		      hw_state->mg_pll_bias,
+		      hw_state->mg_pll_tdc_coldst_bias);
+}
+
+static const struct intel_shared_dpll_funcs combo_pll_funcs = {
+	.enable = combo_pll_enable,
+	.disable = combo_pll_disable,
+	.get_hw_state = combo_pll_get_hw_state,
+};
+
+static const struct intel_shared_dpll_funcs tbt_pll_funcs = {
+	.enable = tbt_pll_enable,
+	.disable = tbt_pll_disable,
+	.get_hw_state = tbt_pll_get_hw_state,
+};
+
+static const struct intel_shared_dpll_funcs mg_pll_funcs = {
+	.enable = mg_pll_enable,
+	.disable = mg_pll_disable,
+	.get_hw_state = mg_pll_get_hw_state,
+};
+
+static const struct dpll_info icl_plls[] = {
+	{ "DPLL 0",   &combo_pll_funcs, DPLL_ID_ICL_DPLL0,  0 },
+	{ "DPLL 1",   &combo_pll_funcs, DPLL_ID_ICL_DPLL1,  0 },
+	{ "TBT PLL",  &tbt_pll_funcs, DPLL_ID_ICL_TBTPLL, 0 },
+	{ "MG PLL 1", &mg_pll_funcs, DPLL_ID_ICL_MGPLL1, 0 },
+	{ "MG PLL 2", &mg_pll_funcs, DPLL_ID_ICL_MGPLL2, 0 },
+	{ "MG PLL 3", &mg_pll_funcs, DPLL_ID_ICL_MGPLL3, 0 },
+	{ "MG PLL 4", &mg_pll_funcs, DPLL_ID_ICL_MGPLL4, 0 },
+	{ },
+};
+
+static const struct intel_dpll_mgr icl_pll_mgr = {
+	.dpll_info = icl_plls,
+	.get_dpll = icl_get_dpll,
+	.dump_hw_state = icl_dump_hw_state,
+};
+
+static const struct dpll_info ehl_plls[] = {
+	{ "DPLL 0", &combo_pll_funcs, DPLL_ID_ICL_DPLL0, 0 },
+	{ "DPLL 1", &combo_pll_funcs, DPLL_ID_ICL_DPLL1, 0 },
+	{ },
+};
+
+static const struct intel_dpll_mgr ehl_pll_mgr = {
+	.dpll_info = ehl_plls,
+	.get_dpll = icl_get_dpll,
+	.dump_hw_state = icl_dump_hw_state,
+};
+
+/**
+ * intel_shared_dpll_init - Initialize shared DPLLs
+ * @dev: drm device
+ *
+ * Initialize shared DPLLs for @dev.
+ */
+void intel_shared_dpll_init(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	const struct intel_dpll_mgr *dpll_mgr = NULL;
+	const struct dpll_info *dpll_info;
+	int i;
+
+	if (IS_ELKHARTLAKE(dev_priv))
+		dpll_mgr = &ehl_pll_mgr;
+	else if (INTEL_GEN(dev_priv) >= 11)
+		dpll_mgr = &icl_pll_mgr;
+	else if (IS_CANNONLAKE(dev_priv))
+		dpll_mgr = &cnl_pll_mgr;
+	else if (IS_GEN9_BC(dev_priv))
+		dpll_mgr = &skl_pll_mgr;
+	else if (IS_GEN9_LP(dev_priv))
+		dpll_mgr = &bxt_pll_mgr;
+	else if (HAS_DDI(dev_priv))
+		dpll_mgr = &hsw_pll_mgr;
+	else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv))
+		dpll_mgr = &pch_pll_mgr;
+
+	if (!dpll_mgr) {
+		dev_priv->num_shared_dpll = 0;
+		return;
+	}
+
+	dpll_info = dpll_mgr->dpll_info;
+
+	for (i = 0; dpll_info[i].name; i++) {
+		WARN_ON(i != dpll_info[i].id);
+		dev_priv->shared_dplls[i].info = &dpll_info[i];
+	}
+
+	dev_priv->dpll_mgr = dpll_mgr;
+	dev_priv->num_shared_dpll = i;
+	mutex_init(&dev_priv->dpll_lock);
+
+	BUG_ON(dev_priv->num_shared_dpll > I915_NUM_PLLS);
+}
+
+/**
+ * intel_get_shared_dpll - get a shared DPLL for CRTC and encoder combination
+ * @crtc_state: atomic state for the crtc
+ * @encoder: encoder
+ *
+ * Find an appropriate DPLL for the given CRTC and encoder combination. A
+ * reference from the @crtc_state to the returned pll is registered in the
+ * atomic state. That configuration is made effective by calling
+ * intel_shared_dpll_swap_state(). The reference should be released by calling
+ * intel_release_shared_dpll().
+ *
+ * Returns:
+ * A shared DPLL to be used by @crtc_state and @encoder.
+ */
+struct intel_shared_dpll *
+intel_get_shared_dpll(struct intel_crtc_state *crtc_state,
+		      struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+	const struct intel_dpll_mgr *dpll_mgr = dev_priv->dpll_mgr;
+
+	if (WARN_ON(!dpll_mgr))
+		return NULL;
+
+	return dpll_mgr->get_dpll(crtc_state, encoder);
+}
+
+/**
+ * intel_release_shared_dpll - end use of DPLL by CRTC in atomic state
+ * @dpll: dpll in use by @crtc
+ * @crtc: crtc
+ * @state: atomic state
+ *
+ * This function releases the reference from @crtc to @dpll from the
+ * atomic @state. The new configuration is made effective by calling
+ * intel_shared_dpll_swap_state().
+ */
+void intel_release_shared_dpll(struct intel_shared_dpll *dpll,
+			       struct intel_crtc *crtc,
+			       struct drm_atomic_state *state)
+{
+	struct intel_shared_dpll_state *shared_dpll_state;
+
+	shared_dpll_state = intel_atomic_get_shared_dpll_state(state);
+	shared_dpll_state[dpll->info->id].crtc_mask &= ~(1 << crtc->pipe);
+}
+
+/**
+ * intel_shared_dpll_dump_hw_state - write hw_state to dmesg
+ * @dev_priv: i915 drm device
+ * @hw_state: hw state to be written to the log
+ *
+ * Write the relevant values in @hw_state to dmesg using DRM_DEBUG_KMS.
+ */
+void intel_dpll_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state)
+{
+	if (dev_priv->dpll_mgr) {
+		dev_priv->dpll_mgr->dump_hw_state(dev_priv, hw_state);
+	} else {
+		/* fallback for platforms that don't use the shared dpll
+		 * infrastructure
+		 */
+		DRM_DEBUG_KMS("dpll_hw_state: dpll: 0x%x, dpll_md: 0x%x, "
+			      "fp0: 0x%x, fp1: 0x%x\n",
+			      hw_state->dpll,
+			      hw_state->dpll_md,
+			      hw_state->fp0,
+			      hw_state->fp1);
+	}
+}
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.h b/drivers/gpu/drm/i915/display/intel_dpll_mgr.h
new file mode 100644
index 000000000000..d0570414f3d1
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.h
@@ -0,0 +1,351 @@
+/*
+ * Copyright © 2012-2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef _INTEL_DPLL_MGR_H_
+#define _INTEL_DPLL_MGR_H_
+
+#include <linux/types.h>
+
+#include "intel_display.h"
+
+/*FIXME: Move this to a more appropriate place. */
+#define abs_diff(a, b) ({			\
+	typeof(a) __a = (a);			\
+	typeof(b) __b = (b);			\
+	(void) (&__a == &__b);			\
+	__a > __b ? (__a - __b) : (__b - __a); })
+
+struct drm_atomic_state;
+struct drm_device;
+struct drm_i915_private;
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_encoder;
+struct intel_shared_dpll;
+
+/**
+ * enum intel_dpll_id - possible DPLL ids
+ *
+ * Enumeration of possible IDs for a DPLL. Real shared dpll ids must be >= 0.
+ */
+enum intel_dpll_id {
+	/**
+	 * @DPLL_ID_PRIVATE: non-shared dpll in use
+	 */
+	DPLL_ID_PRIVATE = -1,
+
+	/**
+	 * @DPLL_ID_PCH_PLL_A: DPLL A in ILK, SNB and IVB
+	 */
+	DPLL_ID_PCH_PLL_A = 0,
+	/**
+	 * @DPLL_ID_PCH_PLL_B: DPLL B in ILK, SNB and IVB
+	 */
+	DPLL_ID_PCH_PLL_B = 1,
+
+
+	/**
+	 * @DPLL_ID_WRPLL1: HSW and BDW WRPLL1
+	 */
+	DPLL_ID_WRPLL1 = 0,
+	/**
+	 * @DPLL_ID_WRPLL2: HSW and BDW WRPLL2
+	 */
+	DPLL_ID_WRPLL2 = 1,
+	/**
+	 * @DPLL_ID_SPLL: HSW and BDW SPLL
+	 */
+	DPLL_ID_SPLL = 2,
+	/**
+	 * @DPLL_ID_LCPLL_810: HSW and BDW 0.81 GHz LCPLL
+	 */
+	DPLL_ID_LCPLL_810 = 3,
+	/**
+	 * @DPLL_ID_LCPLL_1350: HSW and BDW 1.35 GHz LCPLL
+	 */
+	DPLL_ID_LCPLL_1350 = 4,
+	/**
+	 * @DPLL_ID_LCPLL_2700: HSW and BDW 2.7 GHz LCPLL
+	 */
+	DPLL_ID_LCPLL_2700 = 5,
+
+
+	/**
+	 * @DPLL_ID_SKL_DPLL0: SKL and later DPLL0
+	 */
+	DPLL_ID_SKL_DPLL0 = 0,
+	/**
+	 * @DPLL_ID_SKL_DPLL1: SKL and later DPLL1
+	 */
+	DPLL_ID_SKL_DPLL1 = 1,
+	/**
+	 * @DPLL_ID_SKL_DPLL2: SKL and later DPLL2
+	 */
+	DPLL_ID_SKL_DPLL2 = 2,
+	/**
+	 * @DPLL_ID_SKL_DPLL3: SKL and later DPLL3
+	 */
+	DPLL_ID_SKL_DPLL3 = 3,
+
+
+	/**
+	 * @DPLL_ID_ICL_DPLL0: ICL combo PHY DPLL0
+	 */
+	DPLL_ID_ICL_DPLL0 = 0,
+	/**
+	 * @DPLL_ID_ICL_DPLL1: ICL combo PHY DPLL1
+	 */
+	DPLL_ID_ICL_DPLL1 = 1,
+	/**
+	 * @DPLL_ID_ICL_TBTPLL: ICL TBT PLL
+	 */
+	DPLL_ID_ICL_TBTPLL = 2,
+	/**
+	 * @DPLL_ID_ICL_MGPLL1: ICL MG PLL 1 port 1 (C)
+	 */
+	DPLL_ID_ICL_MGPLL1 = 3,
+	/**
+	 * @DPLL_ID_ICL_MGPLL2: ICL MG PLL 1 port 2 (D)
+	 */
+	DPLL_ID_ICL_MGPLL2 = 4,
+	/**
+	 * @DPLL_ID_ICL_MGPLL3: ICL MG PLL 1 port 3 (E)
+	 */
+	DPLL_ID_ICL_MGPLL3 = 5,
+	/**
+	 * @DPLL_ID_ICL_MGPLL4: ICL MG PLL 1 port 4 (F)
+	 */
+	DPLL_ID_ICL_MGPLL4 = 6,
+};
+#define I915_NUM_PLLS 7
+
+struct intel_dpll_hw_state {
+	/* i9xx, pch plls */
+	u32 dpll;
+	u32 dpll_md;
+	u32 fp0;
+	u32 fp1;
+
+	/* hsw, bdw */
+	u32 wrpll;
+	u32 spll;
+
+	/* skl */
+	/*
+	 * DPLL_CTRL1 has 6 bits for each each this DPLL. We store those in
+	 * lower part of ctrl1 and they get shifted into position when writing
+	 * the register.  This allows us to easily compare the state to share
+	 * the DPLL.
+	 */
+	u32 ctrl1;
+	/* HDMI only, 0 when used for DP */
+	u32 cfgcr1, cfgcr2;
+
+	/* cnl */
+	u32 cfgcr0;
+	/* CNL also uses cfgcr1 */
+
+	/* bxt */
+	u32 ebb0, ebb4, pll0, pll1, pll2, pll3, pll6, pll8, pll9, pll10, pcsdw12;
+
+	/*
+	 * ICL uses the following, already defined:
+	 * u32 cfgcr0, cfgcr1;
+	 */
+	u32 mg_refclkin_ctl;
+	u32 mg_clktop2_coreclkctl1;
+	u32 mg_clktop2_hsclkctl;
+	u32 mg_pll_div0;
+	u32 mg_pll_div1;
+	u32 mg_pll_lf;
+	u32 mg_pll_frac_lock;
+	u32 mg_pll_ssc;
+	u32 mg_pll_bias;
+	u32 mg_pll_tdc_coldst_bias;
+	u32 mg_pll_bias_mask;
+	u32 mg_pll_tdc_coldst_bias_mask;
+};
+
+/**
+ * struct intel_shared_dpll_state - hold the DPLL atomic state
+ *
+ * This structure holds an atomic state for the DPLL, that can represent
+ * either its current state (in struct &intel_shared_dpll) or a desired
+ * future state which would be applied by an atomic mode set (stored in
+ * a struct &intel_atomic_state).
+ *
+ * See also intel_get_shared_dpll() and intel_release_shared_dpll().
+ */
+struct intel_shared_dpll_state {
+	/**
+	 * @crtc_mask: mask of CRTC using this DPLL, active or not
+	 */
+	unsigned crtc_mask;
+
+	/**
+	 * @hw_state: hardware configuration for the DPLL stored in
+	 * struct &intel_dpll_hw_state.
+	 */
+	struct intel_dpll_hw_state hw_state;
+};
+
+/**
+ * struct intel_shared_dpll_funcs - platform specific hooks for managing DPLLs
+ */
+struct intel_shared_dpll_funcs {
+	/**
+	 * @prepare:
+	 *
+	 * Optional hook to perform operations prior to enabling the PLL.
+	 * Called from intel_prepare_shared_dpll() function unless the PLL
+	 * is already enabled.
+	 */
+	void (*prepare)(struct drm_i915_private *dev_priv,
+			struct intel_shared_dpll *pll);
+
+	/**
+	 * @enable:
+	 *
+	 * Hook for enabling the pll, called from intel_enable_shared_dpll()
+	 * if the pll is not already enabled.
+	 */
+	void (*enable)(struct drm_i915_private *dev_priv,
+		       struct intel_shared_dpll *pll);
+
+	/**
+	 * @disable:
+	 *
+	 * Hook for disabling the pll, called from intel_disable_shared_dpll()
+	 * only when it is safe to disable the pll, i.e., there are no more
+	 * tracked users for it.
+	 */
+	void (*disable)(struct drm_i915_private *dev_priv,
+			struct intel_shared_dpll *pll);
+
+	/**
+	 * @get_hw_state:
+	 *
+	 * Hook for reading the values currently programmed to the DPLL
+	 * registers. This is used for initial hw state readout and state
+	 * verification after a mode set.
+	 */
+	bool (*get_hw_state)(struct drm_i915_private *dev_priv,
+			     struct intel_shared_dpll *pll,
+			     struct intel_dpll_hw_state *hw_state);
+};
+
+/**
+ * struct dpll_info - display PLL platform specific info
+ */
+struct dpll_info {
+	/**
+	 * @name: DPLL name; used for logging
+	 */
+	const char *name;
+
+	/**
+	 * @funcs: platform specific hooks
+	 */
+	const struct intel_shared_dpll_funcs *funcs;
+
+	/**
+	 * @id: unique indentifier for this DPLL; should match the index in the
+	 * dev_priv->shared_dplls array
+	 */
+	enum intel_dpll_id id;
+
+#define INTEL_DPLL_ALWAYS_ON	(1 << 0)
+	/**
+	 * @flags:
+	 *
+	 * INTEL_DPLL_ALWAYS_ON
+	 *     Inform the state checker that the DPLL is kept enabled even if
+	 *     not in use by any CRTC.
+	 */
+	u32 flags;
+};
+
+/**
+ * struct intel_shared_dpll - display PLL with tracked state and users
+ */
+struct intel_shared_dpll {
+	/**
+	 * @state:
+	 *
+	 * Store the state for the pll, including its hw state
+	 * and CRTCs using it.
+	 */
+	struct intel_shared_dpll_state state;
+
+	/**
+	 * @active_mask: mask of active CRTCs (i.e. DPMS on) using this DPLL
+	 */
+	unsigned active_mask;
+
+	/**
+	 * @on: is the PLL actually active? Disabled during modeset
+	 */
+	bool on;
+
+	/**
+	 * @info: platform specific info
+	 */
+	const struct dpll_info *info;
+};
+
+#define SKL_DPLL0 0
+#define SKL_DPLL1 1
+#define SKL_DPLL2 2
+#define SKL_DPLL3 3
+
+/* shared dpll functions */
+struct intel_shared_dpll *
+intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
+			    enum intel_dpll_id id);
+enum intel_dpll_id
+intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
+			 struct intel_shared_dpll *pll);
+void assert_shared_dpll(struct drm_i915_private *dev_priv,
+			struct intel_shared_dpll *pll,
+			bool state);
+#define assert_shared_dpll_enabled(d, p) assert_shared_dpll(d, p, true)
+#define assert_shared_dpll_disabled(d, p) assert_shared_dpll(d, p, false)
+struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc_state *state,
+						struct intel_encoder *encoder);
+void intel_release_shared_dpll(struct intel_shared_dpll *dpll,
+			       struct intel_crtc *crtc,
+			       struct drm_atomic_state *state);
+void intel_prepare_shared_dpll(const struct intel_crtc_state *crtc_state);
+void intel_enable_shared_dpll(const struct intel_crtc_state *crtc_state);
+void intel_disable_shared_dpll(const struct intel_crtc_state *crtc_state);
+void intel_shared_dpll_swap_state(struct drm_atomic_state *state);
+void intel_shared_dpll_init(struct drm_device *dev);
+
+void intel_dpll_dump_hw_state(struct drm_i915_private *dev_priv,
+			      const struct intel_dpll_hw_state *hw_state);
+int cnl_hdmi_pll_ref_clock(struct drm_i915_private *dev_priv);
+enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port);
+bool intel_dpll_is_combophy(enum intel_dpll_id id);
+
+#endif /* _INTEL_DPLL_MGR_H_ */
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
new file mode 100644
index 000000000000..d36cada2cc7d
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -0,0 +1,1345 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * DOC: Frame Buffer Compression (FBC)
+ *
+ * FBC tries to save memory bandwidth (and so power consumption) by
+ * compressing the amount of memory used by the display. It is total
+ * transparent to user space and completely handled in the kernel.
+ *
+ * The benefits of FBC are mostly visible with solid backgrounds and
+ * variation-less patterns. It comes from keeping the memory footprint small
+ * and having fewer memory pages opened and accessed for refreshing the display.
+ *
+ * i915 is responsible to reserve stolen memory for FBC and configure its
+ * offset on proper registers. The hardware takes care of all
+ * compress/decompress. However there are many known cases where we have to
+ * forcibly disable it to allow proper screen updates.
+ */
+
+#include <drm/drm_fourcc.h>
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
+#include "intel_frontbuffer.h"
+
+static inline bool fbc_supported(struct drm_i915_private *dev_priv)
+{
+	return HAS_FBC(dev_priv);
+}
+
+static inline bool no_fbc_on_multiple_pipes(struct drm_i915_private *dev_priv)
+{
+	return INTEL_GEN(dev_priv) <= 3;
+}
+
+/*
+ * In some platforms where the CRTC's x:0/y:0 coordinates doesn't match the
+ * frontbuffer's x:0/y:0 coordinates we lie to the hardware about the plane's
+ * origin so the x and y offsets can actually fit the registers. As a
+ * consequence, the fence doesn't really start exactly at the display plane
+ * address we program because it starts at the real start of the buffer, so we
+ * have to take this into consideration here.
+ */
+static unsigned int get_crtc_fence_y_offset(struct intel_fbc *fbc)
+{
+	return fbc->state_cache.plane.y - fbc->state_cache.plane.adjusted_y;
+}
+
+/*
+ * For SKL+, the plane source size used by the hardware is based on the value we
+ * write to the PLANE_SIZE register. For BDW-, the hardware looks at the value
+ * we wrote to PIPESRC.
+ */
+static void intel_fbc_get_plane_source_size(struct intel_fbc_state_cache *cache,
+					    int *width, int *height)
+{
+	if (width)
+		*width = cache->plane.src_w;
+	if (height)
+		*height = cache->plane.src_h;
+}
+
+static int intel_fbc_calculate_cfb_size(struct drm_i915_private *dev_priv,
+					struct intel_fbc_state_cache *cache)
+{
+	int lines;
+
+	intel_fbc_get_plane_source_size(cache, NULL, &lines);
+	if (IS_GEN(dev_priv, 7))
+		lines = min(lines, 2048);
+	else if (INTEL_GEN(dev_priv) >= 8)
+		lines = min(lines, 2560);
+
+	/* Hardware needs the full buffer stride, not just the active area. */
+	return lines * cache->fb.stride;
+}
+
+static void i8xx_fbc_deactivate(struct drm_i915_private *dev_priv)
+{
+	u32 fbc_ctl;
+
+	/* Disable compression */
+	fbc_ctl = I915_READ(FBC_CONTROL);
+	if ((fbc_ctl & FBC_CTL_EN) == 0)
+		return;
+
+	fbc_ctl &= ~FBC_CTL_EN;
+	I915_WRITE(FBC_CONTROL, fbc_ctl);
+
+	/* Wait for compressing bit to clear */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    FBC_STATUS, FBC_STAT_COMPRESSING, 0,
+				    10)) {
+		DRM_DEBUG_KMS("FBC idle timed out\n");
+		return;
+	}
+}
+
+static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
+	int cfb_pitch;
+	int i;
+	u32 fbc_ctl;
+
+	/* Note: fbc.threshold == 1 for i8xx */
+	cfb_pitch = params->cfb_size / FBC_LL_SIZE;
+	if (params->fb.stride < cfb_pitch)
+		cfb_pitch = params->fb.stride;
+
+	/* FBC_CTL wants 32B or 64B units */
+	if (IS_GEN(dev_priv, 2))
+		cfb_pitch = (cfb_pitch / 32) - 1;
+	else
+		cfb_pitch = (cfb_pitch / 64) - 1;
+
+	/* Clear old tags */
+	for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
+		I915_WRITE(FBC_TAG(i), 0);
+
+	if (IS_GEN(dev_priv, 4)) {
+		u32 fbc_ctl2;
+
+		/* Set it up... */
+		fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
+		fbc_ctl2 |= FBC_CTL_PLANE(params->crtc.i9xx_plane);
+		I915_WRITE(FBC_CONTROL2, fbc_ctl2);
+		I915_WRITE(FBC_FENCE_OFF, params->crtc.fence_y_offset);
+	}
+
+	/* enable it... */
+	fbc_ctl = I915_READ(FBC_CONTROL);
+	fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT;
+	fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC;
+	if (IS_I945GM(dev_priv))
+		fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
+	fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
+	fbc_ctl |= params->vma->fence->id;
+	I915_WRITE(FBC_CONTROL, fbc_ctl);
+}
+
+static bool i8xx_fbc_is_active(struct drm_i915_private *dev_priv)
+{
+	return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
+}
+
+static void g4x_fbc_activate(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
+	u32 dpfc_ctl;
+
+	dpfc_ctl = DPFC_CTL_PLANE(params->crtc.i9xx_plane) | DPFC_SR_EN;
+	if (params->fb.format->cpp[0] == 2)
+		dpfc_ctl |= DPFC_CTL_LIMIT_2X;
+	else
+		dpfc_ctl |= DPFC_CTL_LIMIT_1X;
+
+	if (params->flags & PLANE_HAS_FENCE) {
+		dpfc_ctl |= DPFC_CTL_FENCE_EN | params->vma->fence->id;
+		I915_WRITE(DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
+	} else {
+		I915_WRITE(DPFC_FENCE_YOFF, 0);
+	}
+
+	/* enable it... */
+	I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
+}
+
+static void g4x_fbc_deactivate(struct drm_i915_private *dev_priv)
+{
+	u32 dpfc_ctl;
+
+	/* Disable compression */
+	dpfc_ctl = I915_READ(DPFC_CONTROL);
+	if (dpfc_ctl & DPFC_CTL_EN) {
+		dpfc_ctl &= ~DPFC_CTL_EN;
+		I915_WRITE(DPFC_CONTROL, dpfc_ctl);
+	}
+}
+
+static bool g4x_fbc_is_active(struct drm_i915_private *dev_priv)
+{
+	return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
+}
+
+/* This function forces a CFB recompression through the nuke operation. */
+static void intel_fbc_recompress(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(MSG_FBC_REND_STATE, FBC_REND_NUKE);
+	POSTING_READ(MSG_FBC_REND_STATE);
+}
+
+static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
+	u32 dpfc_ctl;
+	int threshold = dev_priv->fbc.threshold;
+
+	dpfc_ctl = DPFC_CTL_PLANE(params->crtc.i9xx_plane);
+	if (params->fb.format->cpp[0] == 2)
+		threshold++;
+
+	switch (threshold) {
+	case 4:
+	case 3:
+		dpfc_ctl |= DPFC_CTL_LIMIT_4X;
+		break;
+	case 2:
+		dpfc_ctl |= DPFC_CTL_LIMIT_2X;
+		break;
+	case 1:
+		dpfc_ctl |= DPFC_CTL_LIMIT_1X;
+		break;
+	}
+
+	if (params->flags & PLANE_HAS_FENCE) {
+		dpfc_ctl |= DPFC_CTL_FENCE_EN;
+		if (IS_GEN(dev_priv, 5))
+			dpfc_ctl |= params->vma->fence->id;
+		if (IS_GEN(dev_priv, 6)) {
+			I915_WRITE(SNB_DPFC_CTL_SA,
+				   SNB_CPU_FENCE_ENABLE |
+				   params->vma->fence->id);
+			I915_WRITE(DPFC_CPU_FENCE_OFFSET,
+				   params->crtc.fence_y_offset);
+		}
+	} else {
+		if (IS_GEN(dev_priv, 6)) {
+			I915_WRITE(SNB_DPFC_CTL_SA, 0);
+			I915_WRITE(DPFC_CPU_FENCE_OFFSET, 0);
+		}
+	}
+
+	I915_WRITE(ILK_DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
+	I915_WRITE(ILK_FBC_RT_BASE,
+		   i915_ggtt_offset(params->vma) | ILK_FBC_RT_VALID);
+	/* enable it... */
+	I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
+
+	intel_fbc_recompress(dev_priv);
+}
+
+static void ilk_fbc_deactivate(struct drm_i915_private *dev_priv)
+{
+	u32 dpfc_ctl;
+
+	/* Disable compression */
+	dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
+	if (dpfc_ctl & DPFC_CTL_EN) {
+		dpfc_ctl &= ~DPFC_CTL_EN;
+		I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
+	}
+}
+
+static bool ilk_fbc_is_active(struct drm_i915_private *dev_priv)
+{
+	return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
+}
+
+static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
+	u32 dpfc_ctl;
+	int threshold = dev_priv->fbc.threshold;
+
+	/* Display WA #0529: skl, kbl, bxt. */
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv)) {
+		u32 val = I915_READ(CHICKEN_MISC_4);
+
+		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
+
+		if (i915_gem_object_get_tiling(params->vma->obj) !=
+		    I915_TILING_X)
+			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
+
+		I915_WRITE(CHICKEN_MISC_4, val);
+	}
+
+	dpfc_ctl = 0;
+	if (IS_IVYBRIDGE(dev_priv))
+		dpfc_ctl |= IVB_DPFC_CTL_PLANE(params->crtc.i9xx_plane);
+
+	if (params->fb.format->cpp[0] == 2)
+		threshold++;
+
+	switch (threshold) {
+	case 4:
+	case 3:
+		dpfc_ctl |= DPFC_CTL_LIMIT_4X;
+		break;
+	case 2:
+		dpfc_ctl |= DPFC_CTL_LIMIT_2X;
+		break;
+	case 1:
+		dpfc_ctl |= DPFC_CTL_LIMIT_1X;
+		break;
+	}
+
+	if (params->flags & PLANE_HAS_FENCE) {
+		dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN;
+		I915_WRITE(SNB_DPFC_CTL_SA,
+			   SNB_CPU_FENCE_ENABLE |
+			   params->vma->fence->id);
+		I915_WRITE(DPFC_CPU_FENCE_OFFSET, params->crtc.fence_y_offset);
+	} else {
+		I915_WRITE(SNB_DPFC_CTL_SA,0);
+		I915_WRITE(DPFC_CPU_FENCE_OFFSET, 0);
+	}
+
+	if (dev_priv->fbc.false_color)
+		dpfc_ctl |= FBC_CTL_FALSE_COLOR;
+
+	if (IS_IVYBRIDGE(dev_priv)) {
+		/* WaFbcAsynchFlipDisableFbcQueue:ivb */
+		I915_WRITE(ILK_DISPLAY_CHICKEN1,
+			   I915_READ(ILK_DISPLAY_CHICKEN1) |
+			   ILK_FBCQ_DIS);
+	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		/* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */
+		I915_WRITE(CHICKEN_PIPESL_1(params->crtc.pipe),
+			   I915_READ(CHICKEN_PIPESL_1(params->crtc.pipe)) |
+			   HSW_FBCQ_DIS);
+	}
+
+	if (IS_GEN(dev_priv, 11))
+		/* Wa_1409120013:icl,ehl */
+		I915_WRITE(ILK_DPFC_CHICKEN, ILK_DPFC_CHICKEN_COMP_DUMMY_PIXEL);
+
+	I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
+
+	intel_fbc_recompress(dev_priv);
+}
+
+static bool intel_fbc_hw_is_active(struct drm_i915_private *dev_priv)
+{
+	if (INTEL_GEN(dev_priv) >= 5)
+		return ilk_fbc_is_active(dev_priv);
+	else if (IS_GM45(dev_priv))
+		return g4x_fbc_is_active(dev_priv);
+	else
+		return i8xx_fbc_is_active(dev_priv);
+}
+
+static void intel_fbc_hw_activate(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	fbc->active = true;
+
+	if (INTEL_GEN(dev_priv) >= 7)
+		gen7_fbc_activate(dev_priv);
+	else if (INTEL_GEN(dev_priv) >= 5)
+		ilk_fbc_activate(dev_priv);
+	else if (IS_GM45(dev_priv))
+		g4x_fbc_activate(dev_priv);
+	else
+		i8xx_fbc_activate(dev_priv);
+}
+
+static void intel_fbc_hw_deactivate(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	fbc->active = false;
+
+	if (INTEL_GEN(dev_priv) >= 5)
+		ilk_fbc_deactivate(dev_priv);
+	else if (IS_GM45(dev_priv))
+		g4x_fbc_deactivate(dev_priv);
+	else
+		i8xx_fbc_deactivate(dev_priv);
+}
+
+/**
+ * intel_fbc_is_active - Is FBC active?
+ * @dev_priv: i915 device instance
+ *
+ * This function is used to verify the current state of FBC.
+ *
+ * FIXME: This should be tracked in the plane config eventually
+ * instead of queried at runtime for most callers.
+ */
+bool intel_fbc_is_active(struct drm_i915_private *dev_priv)
+{
+	return dev_priv->fbc.active;
+}
+
+static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
+				 const char *reason)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	WARN_ON(!mutex_is_locked(&fbc->lock));
+
+	if (fbc->active)
+		intel_fbc_hw_deactivate(dev_priv);
+
+	fbc->no_fbc_reason = reason;
+}
+
+static bool multiple_pipes_ok(struct intel_crtc *crtc,
+			      struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	enum pipe pipe = crtc->pipe;
+
+	/* Don't even bother tracking anything we don't need. */
+	if (!no_fbc_on_multiple_pipes(dev_priv))
+		return true;
+
+	if (plane_state->base.visible)
+		fbc->visible_pipes_mask |= (1 << pipe);
+	else
+		fbc->visible_pipes_mask &= ~(1 << pipe);
+
+	return (fbc->visible_pipes_mask & ~(1 << pipe)) != 0;
+}
+
+static int find_compression_threshold(struct drm_i915_private *dev_priv,
+				      struct drm_mm_node *node,
+				      int size,
+				      int fb_cpp)
+{
+	int compression_threshold = 1;
+	int ret;
+	u64 end;
+
+	/* The FBC hardware for BDW/SKL doesn't have access to the stolen
+	 * reserved range size, so it always assumes the maximum (8mb) is used.
+	 * If we enable FBC using a CFB on that memory range we'll get FIFO
+	 * underruns, even if that range is not reserved by the BIOS. */
+	if (IS_BROADWELL(dev_priv) || IS_GEN9_BC(dev_priv))
+		end = resource_size(&dev_priv->dsm) - 8 * 1024 * 1024;
+	else
+		end = U64_MAX;
+
+	/* HACK: This code depends on what we will do in *_enable_fbc. If that
+	 * code changes, this code needs to change as well.
+	 *
+	 * The enable_fbc code will attempt to use one of our 2 compression
+	 * thresholds, therefore, in that case, we only have 1 resort.
+	 */
+
+	/* Try to over-allocate to reduce reallocations and fragmentation. */
+	ret = i915_gem_stolen_insert_node_in_range(dev_priv, node, size <<= 1,
+						   4096, 0, end);
+	if (ret == 0)
+		return compression_threshold;
+
+again:
+	/* HW's ability to limit the CFB is 1:4 */
+	if (compression_threshold > 4 ||
+	    (fb_cpp == 2 && compression_threshold == 2))
+		return 0;
+
+	ret = i915_gem_stolen_insert_node_in_range(dev_priv, node, size >>= 1,
+						   4096, 0, end);
+	if (ret && INTEL_GEN(dev_priv) <= 4) {
+		return 0;
+	} else if (ret) {
+		compression_threshold <<= 1;
+		goto again;
+	} else {
+		return compression_threshold;
+	}
+}
+
+static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct drm_mm_node *uninitialized_var(compressed_llb);
+	int size, fb_cpp, ret;
+
+	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
+
+	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
+	fb_cpp = fbc->state_cache.fb.format->cpp[0];
+
+	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
+					 size, fb_cpp);
+	if (!ret)
+		goto err_llb;
+	else if (ret > 1) {
+		DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n");
+
+	}
+
+	fbc->threshold = ret;
+
+	if (INTEL_GEN(dev_priv) >= 5)
+		I915_WRITE(ILK_DPFC_CB_BASE, fbc->compressed_fb.start);
+	else if (IS_GM45(dev_priv)) {
+		I915_WRITE(DPFC_CB_BASE, fbc->compressed_fb.start);
+	} else {
+		compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL);
+		if (!compressed_llb)
+			goto err_fb;
+
+		ret = i915_gem_stolen_insert_node(dev_priv, compressed_llb,
+						  4096, 4096);
+		if (ret)
+			goto err_fb;
+
+		fbc->compressed_llb = compressed_llb;
+
+		GEM_BUG_ON(range_overflows_t(u64, dev_priv->dsm.start,
+					     fbc->compressed_fb.start,
+					     U32_MAX));
+		GEM_BUG_ON(range_overflows_t(u64, dev_priv->dsm.start,
+					     fbc->compressed_llb->start,
+					     U32_MAX));
+		I915_WRITE(FBC_CFB_BASE,
+			   dev_priv->dsm.start + fbc->compressed_fb.start);
+		I915_WRITE(FBC_LL_BASE,
+			   dev_priv->dsm.start + compressed_llb->start);
+	}
+
+	DRM_DEBUG_KMS("reserved %llu bytes of contiguous stolen space for FBC, threshold: %d\n",
+		      fbc->compressed_fb.size, fbc->threshold);
+
+	return 0;
+
+err_fb:
+	kfree(compressed_llb);
+	i915_gem_stolen_remove_node(dev_priv, &fbc->compressed_fb);
+err_llb:
+	if (drm_mm_initialized(&dev_priv->mm.stolen))
+		pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size);
+	return -ENOSPC;
+}
+
+static void __intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (drm_mm_node_allocated(&fbc->compressed_fb))
+		i915_gem_stolen_remove_node(dev_priv, &fbc->compressed_fb);
+
+	if (fbc->compressed_llb) {
+		i915_gem_stolen_remove_node(dev_priv, fbc->compressed_llb);
+		kfree(fbc->compressed_llb);
+	}
+}
+
+void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+	__intel_fbc_cleanup_cfb(dev_priv);
+	mutex_unlock(&fbc->lock);
+}
+
+static bool stride_is_valid(struct drm_i915_private *dev_priv,
+			    unsigned int stride)
+{
+	/* This should have been caught earlier. */
+	if (WARN_ON_ONCE((stride & (64 - 1)) != 0))
+		return false;
+
+	/* Below are the additional FBC restrictions. */
+	if (stride < 512)
+		return false;
+
+	if (IS_GEN(dev_priv, 2) || IS_GEN(dev_priv, 3))
+		return stride == 4096 || stride == 8192;
+
+	if (IS_GEN(dev_priv, 4) && !IS_G4X(dev_priv) && stride < 2048)
+		return false;
+
+	if (stride > 16384)
+		return false;
+
+	return true;
+}
+
+static bool pixel_format_is_valid(struct drm_i915_private *dev_priv,
+				  u32 pixel_format)
+{
+	switch (pixel_format) {
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR8888:
+		return true;
+	case DRM_FORMAT_XRGB1555:
+	case DRM_FORMAT_RGB565:
+		/* 16bpp not supported on gen2 */
+		if (IS_GEN(dev_priv, 2))
+			return false;
+		/* WaFbcOnly1to1Ratio:ctg */
+		if (IS_G4X(dev_priv))
+			return false;
+		return true;
+	default:
+		return false;
+	}
+}
+
+/*
+ * For some reason, the hardware tracking starts looking at whatever we
+ * programmed as the display plane base address register. It does not look at
+ * the X and Y offset registers. That's why we look at the crtc->adjusted{x,y}
+ * variables instead of just looking at the pipe/plane size.
+ */
+static bool intel_fbc_hw_tracking_covers_screen(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	unsigned int effective_w, effective_h, max_w, max_h;
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+		max_w = 5120;
+		max_h = 4096;
+	} else if (INTEL_GEN(dev_priv) >= 8 || IS_HASWELL(dev_priv)) {
+		max_w = 4096;
+		max_h = 4096;
+	} else if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
+		max_w = 4096;
+		max_h = 2048;
+	} else {
+		max_w = 2048;
+		max_h = 1536;
+	}
+
+	intel_fbc_get_plane_source_size(&fbc->state_cache, &effective_w,
+					&effective_h);
+	effective_w += fbc->state_cache.plane.adjusted_x;
+	effective_h += fbc->state_cache.plane.adjusted_y;
+
+	return effective_w <= max_w && effective_h <= max_h;
+}
+
+static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
+					 struct intel_crtc_state *crtc_state,
+					 struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	struct drm_framebuffer *fb = plane_state->base.fb;
+
+	cache->vma = NULL;
+	cache->flags = 0;
+
+	cache->crtc.mode_flags = crtc_state->base.adjusted_mode.flags;
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		cache->crtc.hsw_bdw_pixel_rate = crtc_state->pixel_rate;
+
+	cache->plane.rotation = plane_state->base.rotation;
+	/*
+	 * Src coordinates are already rotated by 270 degrees for
+	 * the 90/270 degree plane rotation cases (to match the
+	 * GTT mapping), hence no need to account for rotation here.
+	 */
+	cache->plane.src_w = drm_rect_width(&plane_state->base.src) >> 16;
+	cache->plane.src_h = drm_rect_height(&plane_state->base.src) >> 16;
+	cache->plane.visible = plane_state->base.visible;
+	cache->plane.adjusted_x = plane_state->color_plane[0].x;
+	cache->plane.adjusted_y = plane_state->color_plane[0].y;
+	cache->plane.y = plane_state->base.src.y1 >> 16;
+
+	cache->plane.pixel_blend_mode = plane_state->base.pixel_blend_mode;
+
+	if (!cache->plane.visible)
+		return;
+
+	cache->fb.format = fb->format;
+	cache->fb.stride = fb->pitches[0];
+
+	cache->vma = plane_state->vma;
+	cache->flags = plane_state->flags;
+	if (WARN_ON(cache->flags & PLANE_HAS_FENCE && !cache->vma->fence))
+		cache->flags &= ~PLANE_HAS_FENCE;
+}
+
+static bool intel_fbc_can_activate(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+
+	/* We don't need to use a state cache here since this information is
+	 * global for all CRTC.
+	 */
+	if (fbc->underrun_detected) {
+		fbc->no_fbc_reason = "underrun detected";
+		return false;
+	}
+
+	if (!cache->vma) {
+		fbc->no_fbc_reason = "primary plane not visible";
+		return false;
+	}
+
+	if (cache->crtc.mode_flags & DRM_MODE_FLAG_INTERLACE) {
+		fbc->no_fbc_reason = "incompatible mode";
+		return false;
+	}
+
+	if (!intel_fbc_hw_tracking_covers_screen(crtc)) {
+		fbc->no_fbc_reason = "mode too large for compression";
+		return false;
+	}
+
+	/* The use of a CPU fence is mandatory in order to detect writes
+	 * by the CPU to the scanout and trigger updates to the FBC.
+	 *
+	 * Note that is possible for a tiled surface to be unmappable (and
+	 * so have no fence associated with it) due to aperture constaints
+	 * at the time of pinning.
+	 *
+	 * FIXME with 90/270 degree rotation we should use the fence on
+	 * the normal GTT view (the rotated view doesn't even have a
+	 * fence). Would need changes to the FBC fence Y offset as well.
+	 * For now this will effecively disable FBC with 90/270 degree
+	 * rotation.
+	 */
+	if (!(cache->flags & PLANE_HAS_FENCE)) {
+		fbc->no_fbc_reason = "framebuffer not tiled or fenced";
+		return false;
+	}
+	if (INTEL_GEN(dev_priv) <= 4 && !IS_G4X(dev_priv) &&
+	    cache->plane.rotation != DRM_MODE_ROTATE_0) {
+		fbc->no_fbc_reason = "rotation unsupported";
+		return false;
+	}
+
+	if (!stride_is_valid(dev_priv, cache->fb.stride)) {
+		fbc->no_fbc_reason = "framebuffer stride not supported";
+		return false;
+	}
+
+	if (!pixel_format_is_valid(dev_priv, cache->fb.format->format)) {
+		fbc->no_fbc_reason = "pixel format is invalid";
+		return false;
+	}
+
+	if (cache->plane.pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE &&
+	    cache->fb.format->has_alpha) {
+		fbc->no_fbc_reason = "per-pixel alpha blending is incompatible with FBC";
+		return false;
+	}
+
+	/* WaFbcExceedCdClockThreshold:hsw,bdw */
+	if ((IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) &&
+	    cache->crtc.hsw_bdw_pixel_rate >= dev_priv->cdclk.hw.cdclk * 95 / 100) {
+		fbc->no_fbc_reason = "pixel rate is too big";
+		return false;
+	}
+
+	/* It is possible for the required CFB size change without a
+	 * crtc->disable + crtc->enable since it is possible to change the
+	 * stride without triggering a full modeset. Since we try to
+	 * over-allocate the CFB, there's a chance we may keep FBC enabled even
+	 * if this happens, but if we exceed the current CFB size we'll have to
+	 * disable FBC. Notice that it would be possible to disable FBC, wait
+	 * for a frame, free the stolen node, then try to reenable FBC in case
+	 * we didn't get any invalidate/deactivate calls, but this would require
+	 * a lot of tracking just for a specific case. If we conclude it's an
+	 * important case, we can implement it later. */
+	if (intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache) >
+	    fbc->compressed_fb.size * fbc->threshold) {
+		fbc->no_fbc_reason = "CFB requirements changed";
+		return false;
+	}
+
+	/*
+	 * Work around a problem on GEN9+ HW, where enabling FBC on a plane
+	 * having a Y offset that isn't divisible by 4 causes FIFO underrun
+	 * and screen flicker.
+	 */
+	if (IS_GEN_RANGE(dev_priv, 9, 10) &&
+	    (fbc->state_cache.plane.adjusted_y & 3)) {
+		fbc->no_fbc_reason = "plane Y offset is misaligned";
+		return false;
+	}
+
+	return true;
+}
+
+static bool intel_fbc_can_enable(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (intel_vgpu_active(dev_priv)) {
+		fbc->no_fbc_reason = "VGPU is active";
+		return false;
+	}
+
+	if (!i915_modparams.enable_fbc) {
+		fbc->no_fbc_reason = "disabled per module param or by default";
+		return false;
+	}
+
+	if (fbc->underrun_detected) {
+		fbc->no_fbc_reason = "underrun detected";
+		return false;
+	}
+
+	return true;
+}
+
+static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
+				     struct intel_fbc_reg_params *params)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+
+	/* Since all our fields are integer types, use memset here so the
+	 * comparison function can rely on memcmp because the padding will be
+	 * zero. */
+	memset(params, 0, sizeof(*params));
+
+	params->vma = cache->vma;
+	params->flags = cache->flags;
+
+	params->crtc.pipe = crtc->pipe;
+	params->crtc.i9xx_plane = to_intel_plane(crtc->base.primary)->i9xx_plane;
+	params->crtc.fence_y_offset = get_crtc_fence_y_offset(fbc);
+
+	params->fb.format = cache->fb.format;
+	params->fb.stride = cache->fb.stride;
+
+	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
+
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
+		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
+						32 * fbc->threshold) * 8;
+}
+
+void intel_fbc_pre_update(struct intel_crtc *crtc,
+			  struct intel_crtc_state *crtc_state,
+			  struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	const char *reason = "update pending";
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+
+	if (!multiple_pipes_ok(crtc, plane_state)) {
+		reason = "more than one pipe active";
+		goto deactivate;
+	}
+
+	if (!fbc->enabled || fbc->crtc != crtc)
+		goto unlock;
+
+	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
+	fbc->flip_pending = true;
+
+deactivate:
+	intel_fbc_deactivate(dev_priv, reason);
+unlock:
+	mutex_unlock(&fbc->lock);
+}
+
+/**
+ * __intel_fbc_disable - disable FBC
+ * @dev_priv: i915 device instance
+ *
+ * This is the low level function that actually disables FBC. Callers should
+ * grab the FBC lock.
+ */
+static void __intel_fbc_disable(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_crtc *crtc = fbc->crtc;
+
+	WARN_ON(!mutex_is_locked(&fbc->lock));
+	WARN_ON(!fbc->enabled);
+	WARN_ON(fbc->active);
+
+	DRM_DEBUG_KMS("Disabling FBC on pipe %c\n", pipe_name(crtc->pipe));
+
+	__intel_fbc_cleanup_cfb(dev_priv);
+
+	fbc->enabled = false;
+	fbc->crtc = NULL;
+}
+
+static void __intel_fbc_post_update(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	WARN_ON(!mutex_is_locked(&fbc->lock));
+
+	if (!fbc->enabled || fbc->crtc != crtc)
+		return;
+
+	fbc->flip_pending = false;
+	WARN_ON(fbc->active);
+
+	if (!i915_modparams.enable_fbc) {
+		intel_fbc_deactivate(dev_priv, "disabled at runtime per module param");
+		__intel_fbc_disable(dev_priv);
+
+		return;
+	}
+
+	intel_fbc_get_reg_params(crtc, &fbc->params);
+
+	if (!intel_fbc_can_activate(crtc))
+		return;
+
+	if (!fbc->busy_bits) {
+		intel_fbc_deactivate(dev_priv, "FBC enabled (active or scheduled)");
+		intel_fbc_hw_activate(dev_priv);
+	} else
+		intel_fbc_deactivate(dev_priv, "frontbuffer write");
+}
+
+void intel_fbc_post_update(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+	__intel_fbc_post_update(crtc);
+	mutex_unlock(&fbc->lock);
+}
+
+static unsigned int intel_fbc_get_frontbuffer_bit(struct intel_fbc *fbc)
+{
+	if (fbc->enabled)
+		return to_intel_plane(fbc->crtc->base.primary)->frontbuffer_bit;
+	else
+		return fbc->possible_framebuffer_bits;
+}
+
+void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
+			  unsigned int frontbuffer_bits,
+			  enum fb_op_origin origin)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	if (origin == ORIGIN_GTT || origin == ORIGIN_FLIP)
+		return;
+
+	mutex_lock(&fbc->lock);
+
+	fbc->busy_bits |= intel_fbc_get_frontbuffer_bit(fbc) & frontbuffer_bits;
+
+	if (fbc->enabled && fbc->busy_bits)
+		intel_fbc_deactivate(dev_priv, "frontbuffer write");
+
+	mutex_unlock(&fbc->lock);
+}
+
+void intel_fbc_flush(struct drm_i915_private *dev_priv,
+		     unsigned int frontbuffer_bits, enum fb_op_origin origin)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+
+	fbc->busy_bits &= ~frontbuffer_bits;
+
+	if (origin == ORIGIN_GTT || origin == ORIGIN_FLIP)
+		goto out;
+
+	if (!fbc->busy_bits && fbc->enabled &&
+	    (frontbuffer_bits & intel_fbc_get_frontbuffer_bit(fbc))) {
+		if (fbc->active)
+			intel_fbc_recompress(dev_priv);
+		else if (!fbc->flip_pending)
+			__intel_fbc_post_update(fbc->crtc);
+	}
+
+out:
+	mutex_unlock(&fbc->lock);
+}
+
+/**
+ * intel_fbc_choose_crtc - select a CRTC to enable FBC on
+ * @dev_priv: i915 device instance
+ * @state: the atomic state structure
+ *
+ * This function looks at the proposed state for CRTCs and planes, then chooses
+ * which pipe is going to have FBC by setting intel_crtc_state->enable_fbc to
+ * true.
+ *
+ * Later, intel_fbc_enable is going to look for state->enable_fbc and then maybe
+ * enable FBC for the chosen CRTC. If it does, it will set dev_priv->fbc.crtc.
+ */
+void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
+			   struct intel_atomic_state *state)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_plane *plane;
+	struct intel_plane_state *plane_state;
+	bool crtc_chosen = false;
+	int i;
+
+	mutex_lock(&fbc->lock);
+
+	/* Does this atomic commit involve the CRTC currently tied to FBC? */
+	if (fbc->crtc &&
+	    !intel_atomic_get_new_crtc_state(state, fbc->crtc))
+		goto out;
+
+	if (!intel_fbc_can_enable(dev_priv))
+		goto out;
+
+	/* Simply choose the first CRTC that is compatible and has a visible
+	 * plane. We could go for fancier schemes such as checking the plane
+	 * size, but this would just affect the few platforms that don't tie FBC
+	 * to pipe or plane A. */
+	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+		struct intel_crtc_state *crtc_state;
+		struct intel_crtc *crtc = to_intel_crtc(plane_state->base.crtc);
+
+		if (!plane->has_fbc)
+			continue;
+
+		if (!plane_state->base.visible)
+			continue;
+
+		crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
+
+		crtc_state->enable_fbc = true;
+		crtc_chosen = true;
+		break;
+	}
+
+	if (!crtc_chosen)
+		fbc->no_fbc_reason = "no suitable CRTC for FBC";
+
+out:
+	mutex_unlock(&fbc->lock);
+}
+
+/**
+ * intel_fbc_enable: tries to enable FBC on the CRTC
+ * @crtc: the CRTC
+ * @crtc_state: corresponding &drm_crtc_state for @crtc
+ * @plane_state: corresponding &drm_plane_state for the primary plane of @crtc
+ *
+ * This function checks if the given CRTC was chosen for FBC, then enables it if
+ * possible. Notice that it doesn't activate FBC. It is valid to call
+ * intel_fbc_enable multiple times for the same pipe without an
+ * intel_fbc_disable in the middle, as long as it is deactivated.
+ */
+void intel_fbc_enable(struct intel_crtc *crtc,
+		      struct intel_crtc_state *crtc_state,
+		      struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+
+	if (fbc->enabled) {
+		WARN_ON(fbc->crtc == NULL);
+		if (fbc->crtc == crtc) {
+			WARN_ON(!crtc_state->enable_fbc);
+			WARN_ON(fbc->active);
+		}
+		goto out;
+	}
+
+	if (!crtc_state->enable_fbc)
+		goto out;
+
+	WARN_ON(fbc->active);
+	WARN_ON(fbc->crtc != NULL);
+
+	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
+	if (intel_fbc_alloc_cfb(crtc)) {
+		fbc->no_fbc_reason = "not enough stolen memory";
+		goto out;
+	}
+
+	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
+	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
+
+	fbc->enabled = true;
+	fbc->crtc = crtc;
+out:
+	mutex_unlock(&fbc->lock);
+}
+
+/**
+ * intel_fbc_disable - disable FBC if it's associated with crtc
+ * @crtc: the CRTC
+ *
+ * This function disables FBC if it's associated with the provided CRTC.
+ */
+void intel_fbc_disable(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+	if (fbc->crtc == crtc)
+		__intel_fbc_disable(dev_priv);
+	mutex_unlock(&fbc->lock);
+}
+
+/**
+ * intel_fbc_global_disable - globally disable FBC
+ * @dev_priv: i915 device instance
+ *
+ * This function disables FBC regardless of which CRTC is associated with it.
+ */
+void intel_fbc_global_disable(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	mutex_lock(&fbc->lock);
+	if (fbc->enabled) {
+		WARN_ON(fbc->crtc->active);
+		__intel_fbc_disable(dev_priv);
+	}
+	mutex_unlock(&fbc->lock);
+}
+
+static void intel_fbc_underrun_work_fn(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, struct drm_i915_private, fbc.underrun_work);
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	mutex_lock(&fbc->lock);
+
+	/* Maybe we were scheduled twice. */
+	if (fbc->underrun_detected || !fbc->enabled)
+		goto out;
+
+	DRM_DEBUG_KMS("Disabling FBC due to FIFO underrun.\n");
+	fbc->underrun_detected = true;
+
+	intel_fbc_deactivate(dev_priv, "FIFO underrun");
+out:
+	mutex_unlock(&fbc->lock);
+}
+
+/*
+ * intel_fbc_reset_underrun - reset FBC fifo underrun status.
+ * @dev_priv: i915 device instance
+ *
+ * See intel_fbc_handle_fifo_underrun_irq(). For automated testing we
+ * want to re-enable FBC after an underrun to increase test coverage.
+ */
+int intel_fbc_reset_underrun(struct drm_i915_private *dev_priv)
+{
+	int ret;
+
+	cancel_work_sync(&dev_priv->fbc.underrun_work);
+
+	ret = mutex_lock_interruptible(&dev_priv->fbc.lock);
+	if (ret)
+		return ret;
+
+	if (dev_priv->fbc.underrun_detected) {
+		DRM_DEBUG_KMS("Re-allowing FBC after fifo underrun\n");
+		dev_priv->fbc.no_fbc_reason = "FIFO underrun cleared";
+	}
+
+	dev_priv->fbc.underrun_detected = false;
+	mutex_unlock(&dev_priv->fbc.lock);
+
+	return 0;
+}
+
+/**
+ * intel_fbc_handle_fifo_underrun_irq - disable FBC when we get a FIFO underrun
+ * @dev_priv: i915 device instance
+ *
+ * Without FBC, most underruns are harmless and don't really cause too many
+ * problems, except for an annoying message on dmesg. With FBC, underruns can
+ * become black screens or even worse, especially when paired with bad
+ * watermarks. So in order for us to be on the safe side, completely disable FBC
+ * in case we ever detect a FIFO underrun on any pipe. An underrun on any pipe
+ * already suggests that watermarks may be bad, so try to be as safe as
+ * possible.
+ *
+ * This function is called from the IRQ handler.
+ */
+void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	if (!fbc_supported(dev_priv))
+		return;
+
+	/* There's no guarantee that underrun_detected won't be set to true
+	 * right after this check and before the work is scheduled, but that's
+	 * not a problem since we'll check it again under the work function
+	 * while FBC is locked. This check here is just to prevent us from
+	 * unnecessarily scheduling the work, and it relies on the fact that we
+	 * never switch underrun_detect back to false after it's true. */
+	if (READ_ONCE(fbc->underrun_detected))
+		return;
+
+	schedule_work(&fbc->underrun_work);
+}
+
+/**
+ * intel_fbc_init_pipe_state - initialize FBC's CRTC visibility tracking
+ * @dev_priv: i915 device instance
+ *
+ * The FBC code needs to track CRTC visibility since the older platforms can't
+ * have FBC enabled while multiple pipes are used. This function does the
+ * initial setup at driver load to make sure FBC is matching the real hardware.
+ */
+void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv)
+{
+	struct intel_crtc *crtc;
+
+	/* Don't even bother tracking anything if we don't need. */
+	if (!no_fbc_on_multiple_pipes(dev_priv))
+		return;
+
+	for_each_intel_crtc(&dev_priv->drm, crtc)
+		if (intel_crtc_active(crtc) &&
+		    crtc->base.primary->state->visible)
+			dev_priv->fbc.visible_pipes_mask |= (1 << crtc->pipe);
+}
+
+/*
+ * The DDX driver changes its behavior depending on the value it reads from
+ * i915.enable_fbc, so sanitize it by translating the default value into either
+ * 0 or 1 in order to allow it to know what's going on.
+ *
+ * Notice that this is done at driver initialization and we still allow user
+ * space to change the value during runtime without sanitizing it again. IGT
+ * relies on being able to change i915.enable_fbc at runtime.
+ */
+static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
+{
+	if (i915_modparams.enable_fbc >= 0)
+		return !!i915_modparams.enable_fbc;
+
+	if (!HAS_FBC(dev_priv))
+		return 0;
+
+	/* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */
+	if (IS_GEMINILAKE(dev_priv))
+		return 0;
+
+	if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
+		return 1;
+
+	return 0;
+}
+
+static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv)
+{
+	/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
+	if (intel_vtd_active() &&
+	    (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) {
+		DRM_INFO("Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n");
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * intel_fbc_init - Initialize FBC
+ * @dev_priv: the i915 device
+ *
+ * This function might be called during PM init process.
+ */
+void intel_fbc_init(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbc *fbc = &dev_priv->fbc;
+
+	INIT_WORK(&fbc->underrun_work, intel_fbc_underrun_work_fn);
+	mutex_init(&fbc->lock);
+	fbc->enabled = false;
+	fbc->active = false;
+
+	if (need_fbc_vtd_wa(dev_priv))
+		mkwrite_device_info(dev_priv)->display.has_fbc = false;
+
+	i915_modparams.enable_fbc = intel_sanitize_fbc_option(dev_priv);
+	DRM_DEBUG_KMS("Sanitized enable_fbc value: %d\n",
+		      i915_modparams.enable_fbc);
+
+	if (!HAS_FBC(dev_priv)) {
+		fbc->no_fbc_reason = "unsupported by this chipset";
+		return;
+	}
+
+	/* This value was pulled out of someone's hat */
+	if (INTEL_GEN(dev_priv) <= 4 && !IS_GM45(dev_priv))
+		I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT);
+
+	/* We still don't have any sort of hardware state readout for FBC, so
+	 * deactivate it in case the BIOS activated it to make sure software
+	 * matches the hardware state. */
+	if (intel_fbc_hw_is_active(dev_priv))
+		intel_fbc_hw_deactivate(dev_priv);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
new file mode 100644
index 000000000000..50272eda8d43
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fbc.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_FBC_H__
+#define __INTEL_FBC_H__
+
+#include <linux/types.h>
+
+#include "intel_frontbuffer.h"
+
+struct drm_i915_private;
+struct intel_atomic_state;
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_plane_state;
+
+void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
+			   struct intel_atomic_state *state);
+bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
+void intel_fbc_pre_update(struct intel_crtc *crtc,
+			  struct intel_crtc_state *crtc_state,
+			  struct intel_plane_state *plane_state);
+void intel_fbc_post_update(struct intel_crtc *crtc);
+void intel_fbc_init(struct drm_i915_private *dev_priv);
+void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv);
+void intel_fbc_enable(struct intel_crtc *crtc,
+		      struct intel_crtc_state *crtc_state,
+		      struct intel_plane_state *plane_state);
+void intel_fbc_disable(struct intel_crtc *crtc);
+void intel_fbc_global_disable(struct drm_i915_private *dev_priv);
+void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
+			  unsigned int frontbuffer_bits,
+			  enum fb_op_origin origin);
+void intel_fbc_flush(struct drm_i915_private *dev_priv,
+		     unsigned int frontbuffer_bits, enum fb_op_origin origin);
+void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv);
+void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *dev_priv);
+int intel_fbc_reset_underrun(struct drm_i915_private *dev_priv);
+
+#endif /* __INTEL_FBC_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
new file mode 100644
index 000000000000..1edd44ee32b2
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -0,0 +1,640 @@
+/*
+ * Copyright © 2007 David Airlie
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *     David Airlie
+ */
+
+#include <linux/async.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/sysrq.h>
+#include <linux/tty.h>
+#include <linux/vga_switcheroo.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/i915_drm.h>
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_fbdev.h"
+#include "intel_frontbuffer.h"
+
+static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
+{
+	struct drm_i915_gem_object *obj = intel_fb_obj(&ifbdev->fb->base);
+	unsigned int origin =
+		ifbdev->vma_flags & PLANE_HAS_FENCE ? ORIGIN_GTT : ORIGIN_CPU;
+
+	intel_fb_obj_invalidate(obj, origin);
+}
+
+static int intel_fbdev_set_par(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct intel_fbdev *ifbdev =
+		container_of(fb_helper, struct intel_fbdev, helper);
+	int ret;
+
+	ret = drm_fb_helper_set_par(info);
+	if (ret == 0)
+		intel_fbdev_invalidate(ifbdev);
+
+	return ret;
+}
+
+static int intel_fbdev_blank(int blank, struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct intel_fbdev *ifbdev =
+		container_of(fb_helper, struct intel_fbdev, helper);
+	int ret;
+
+	ret = drm_fb_helper_blank(blank, info);
+	if (ret == 0)
+		intel_fbdev_invalidate(ifbdev);
+
+	return ret;
+}
+
+static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
+				   struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct intel_fbdev *ifbdev =
+		container_of(fb_helper, struct intel_fbdev, helper);
+	int ret;
+
+	ret = drm_fb_helper_pan_display(var, info);
+	if (ret == 0)
+		intel_fbdev_invalidate(ifbdev);
+
+	return ret;
+}
+
+static struct fb_ops intelfb_ops = {
+	.owner = THIS_MODULE,
+	DRM_FB_HELPER_DEFAULT_OPS,
+	.fb_set_par = intel_fbdev_set_par,
+	.fb_fillrect = drm_fb_helper_cfb_fillrect,
+	.fb_copyarea = drm_fb_helper_cfb_copyarea,
+	.fb_imageblit = drm_fb_helper_cfb_imageblit,
+	.fb_pan_display = intel_fbdev_pan_display,
+	.fb_blank = intel_fbdev_blank,
+};
+
+static int intelfb_alloc(struct drm_fb_helper *helper,
+			 struct drm_fb_helper_surface_size *sizes)
+{
+	struct intel_fbdev *ifbdev =
+		container_of(helper, struct intel_fbdev, helper);
+	struct drm_framebuffer *fb;
+	struct drm_device *dev = helper->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_mode_fb_cmd2 mode_cmd = {};
+	struct drm_i915_gem_object *obj;
+	int size, ret;
+
+	/* we don't do packed 24bpp */
+	if (sizes->surface_bpp == 24)
+		sizes->surface_bpp = 32;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+
+	mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
+				    DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+	size = PAGE_ALIGN(size);
+
+	/* If the FB is too big, just don't use it since fbdev is not very
+	 * important and we should probably use that space with FBC or other
+	 * features. */
+	obj = NULL;
+	if (size * 2 < dev_priv->stolen_usable_size)
+		obj = i915_gem_object_create_stolen(dev_priv, size);
+	if (obj == NULL)
+		obj = i915_gem_object_create_shmem(dev_priv, size);
+	if (IS_ERR(obj)) {
+		DRM_ERROR("failed to allocate framebuffer\n");
+		ret = PTR_ERR(obj);
+		goto err;
+	}
+
+	fb = intel_framebuffer_create(obj, &mode_cmd);
+	if (IS_ERR(fb)) {
+		ret = PTR_ERR(fb);
+		goto err_obj;
+	}
+
+	ifbdev->fb = to_intel_framebuffer(fb);
+
+	return 0;
+
+err_obj:
+	i915_gem_object_put(obj);
+err:
+	return ret;
+}
+
+static int intelfb_create(struct drm_fb_helper *helper,
+			  struct drm_fb_helper_surface_size *sizes)
+{
+	struct intel_fbdev *ifbdev =
+		container_of(helper, struct intel_fbdev, helper);
+	struct intel_framebuffer *intel_fb = ifbdev->fb;
+	struct drm_device *dev = helper->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	const struct i915_ggtt_view view = {
+		.type = I915_GGTT_VIEW_NORMAL,
+	};
+	struct drm_framebuffer *fb;
+	intel_wakeref_t wakeref;
+	struct fb_info *info;
+	struct i915_vma *vma;
+	unsigned long flags = 0;
+	bool prealloc = false;
+	void __iomem *vaddr;
+	int ret;
+
+	if (intel_fb &&
+	    (sizes->fb_width > intel_fb->base.width ||
+	     sizes->fb_height > intel_fb->base.height)) {
+		DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
+			      " releasing it\n",
+			      intel_fb->base.width, intel_fb->base.height,
+			      sizes->fb_width, sizes->fb_height);
+		drm_framebuffer_put(&intel_fb->base);
+		intel_fb = ifbdev->fb = NULL;
+	}
+	if (!intel_fb || WARN_ON(!intel_fb_obj(&intel_fb->base))) {
+		DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
+		ret = intelfb_alloc(helper, sizes);
+		if (ret)
+			return ret;
+		intel_fb = ifbdev->fb;
+	} else {
+		DRM_DEBUG_KMS("re-using BIOS fb\n");
+		prealloc = true;
+		sizes->fb_width = intel_fb->base.width;
+		sizes->fb_height = intel_fb->base.height;
+	}
+
+	mutex_lock(&dev->struct_mutex);
+	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
+
+	/* Pin the GGTT vma for our access via info->screen_base.
+	 * This also validates that any existing fb inherited from the
+	 * BIOS is suitable for own access.
+	 */
+	vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base,
+					 &view, false, &flags);
+	if (IS_ERR(vma)) {
+		ret = PTR_ERR(vma);
+		goto out_unlock;
+	}
+
+	fb = &ifbdev->fb->base;
+	intel_fb_obj_flush(intel_fb_obj(fb), ORIGIN_DIRTYFB);
+
+	info = drm_fb_helper_alloc_fbi(helper);
+	if (IS_ERR(info)) {
+		DRM_ERROR("Failed to allocate fb_info\n");
+		ret = PTR_ERR(info);
+		goto out_unpin;
+	}
+
+	ifbdev->helper.fb = fb;
+
+	info->fbops = &intelfb_ops;
+
+	/* setup aperture base/size for vesafb takeover */
+	info->apertures->ranges[0].base = dev->mode_config.fb_base;
+	info->apertures->ranges[0].size = ggtt->mappable_end;
+
+	info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma);
+	info->fix.smem_len = vma->node.size;
+
+	vaddr = i915_vma_pin_iomap(vma);
+	if (IS_ERR(vaddr)) {
+		DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
+		ret = PTR_ERR(vaddr);
+		goto out_unpin;
+	}
+	info->screen_base = vaddr;
+	info->screen_size = vma->node.size;
+
+	drm_fb_helper_fill_info(info, &ifbdev->helper, sizes);
+
+	/* If the object is shmemfs backed, it will have given us zeroed pages.
+	 * If the object is stolen however, it will be full of whatever
+	 * garbage was left in there.
+	 */
+	if (intel_fb_obj(fb)->stolen && !prealloc)
+		memset_io(info->screen_base, 0, info->screen_size);
+
+	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+
+	DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x\n",
+		      fb->width, fb->height, i915_ggtt_offset(vma));
+	ifbdev->vma = vma;
+	ifbdev->vma_flags = flags;
+
+	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+	mutex_unlock(&dev->struct_mutex);
+	vga_switcheroo_client_fb_set(pdev, info);
+	return 0;
+
+out_unpin:
+	intel_unpin_fb_vma(vma, flags);
+out_unlock:
+	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+	mutex_unlock(&dev->struct_mutex);
+	return ret;
+}
+
+static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
+	.fb_probe = intelfb_create,
+};
+
+static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
+{
+	/* We rely on the object-free to release the VMA pinning for
+	 * the info->screen_base mmaping. Leaking the VMA is simpler than
+	 * trying to rectify all the possible error paths leading here.
+	 */
+
+	drm_fb_helper_fini(&ifbdev->helper);
+
+	if (ifbdev->vma) {
+		mutex_lock(&ifbdev->helper.dev->struct_mutex);
+		intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
+		mutex_unlock(&ifbdev->helper.dev->struct_mutex);
+	}
+
+	if (ifbdev->fb)
+		drm_framebuffer_remove(&ifbdev->fb->base);
+
+	kfree(ifbdev);
+}
+
+/*
+ * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
+ * The core display code will have read out the current plane configuration,
+ * so we use that to figure out if there's an object for us to use as the
+ * fb, and if so, we re-use it for the fbdev configuration.
+ *
+ * Note we only support a single fb shared across pipes for boot (mostly for
+ * fbcon), so we just find the biggest and use that.
+ */
+static bool intel_fbdev_init_bios(struct drm_device *dev,
+				 struct intel_fbdev *ifbdev)
+{
+	struct intel_framebuffer *fb = NULL;
+	struct drm_crtc *crtc;
+	struct intel_crtc *intel_crtc;
+	unsigned int max_size = 0;
+
+	/* Find the largest fb */
+	for_each_crtc(dev, crtc) {
+		struct drm_i915_gem_object *obj =
+			intel_fb_obj(crtc->primary->state->fb);
+		intel_crtc = to_intel_crtc(crtc);
+
+		if (!crtc->state->active || !obj) {
+			DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
+				      pipe_name(intel_crtc->pipe));
+			continue;
+		}
+
+		if (obj->base.size > max_size) {
+			DRM_DEBUG_KMS("found possible fb from plane %c\n",
+				      pipe_name(intel_crtc->pipe));
+			fb = to_intel_framebuffer(crtc->primary->state->fb);
+			max_size = obj->base.size;
+		}
+	}
+
+	if (!fb) {
+		DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
+		goto out;
+	}
+
+	/* Now make sure all the pipes will fit into it */
+	for_each_crtc(dev, crtc) {
+		unsigned int cur_size;
+
+		intel_crtc = to_intel_crtc(crtc);
+
+		if (!crtc->state->active) {
+			DRM_DEBUG_KMS("pipe %c not active, skipping\n",
+				      pipe_name(intel_crtc->pipe));
+			continue;
+		}
+
+		DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
+			      pipe_name(intel_crtc->pipe));
+
+		/*
+		 * See if the plane fb we found above will fit on this
+		 * pipe.  Note we need to use the selected fb's pitch and bpp
+		 * rather than the current pipe's, since they differ.
+		 */
+		cur_size = crtc->state->adjusted_mode.crtc_hdisplay;
+		cur_size = cur_size * fb->base.format->cpp[0];
+		if (fb->base.pitches[0] < cur_size) {
+			DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
+				      pipe_name(intel_crtc->pipe),
+				      cur_size, fb->base.pitches[0]);
+			fb = NULL;
+			break;
+		}
+
+		cur_size = crtc->state->adjusted_mode.crtc_vdisplay;
+		cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
+		cur_size *= fb->base.pitches[0];
+		DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
+			      pipe_name(intel_crtc->pipe),
+			      crtc->state->adjusted_mode.crtc_hdisplay,
+			      crtc->state->adjusted_mode.crtc_vdisplay,
+			      fb->base.format->cpp[0] * 8,
+			      cur_size);
+
+		if (cur_size > max_size) {
+			DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
+				      pipe_name(intel_crtc->pipe),
+				      cur_size, max_size);
+			fb = NULL;
+			break;
+		}
+
+		DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
+			      pipe_name(intel_crtc->pipe),
+			      max_size, cur_size);
+	}
+
+	if (!fb) {
+		DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
+		goto out;
+	}
+
+	ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8;
+	ifbdev->fb = fb;
+
+	drm_framebuffer_get(&ifbdev->fb->base);
+
+	/* Final pass to check if any active pipes don't have fbs */
+	for_each_crtc(dev, crtc) {
+		intel_crtc = to_intel_crtc(crtc);
+
+		if (!crtc->state->active)
+			continue;
+
+		WARN(!crtc->primary->state->fb,
+		     "re-used BIOS config but lost an fb on crtc %d\n",
+		     crtc->base.id);
+	}
+
+
+	DRM_DEBUG_KMS("using BIOS fb for initial console\n");
+	return true;
+
+out:
+
+	return false;
+}
+
+static void intel_fbdev_suspend_worker(struct work_struct *work)
+{
+	intel_fbdev_set_suspend(&container_of(work,
+					      struct drm_i915_private,
+					      fbdev_suspend_work)->drm,
+				FBINFO_STATE_RUNNING,
+				true);
+}
+
+int intel_fbdev_init(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_fbdev *ifbdev;
+	int ret;
+
+	if (WARN_ON(!HAS_DISPLAY(dev_priv)))
+		return -ENODEV;
+
+	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
+	if (ifbdev == NULL)
+		return -ENOMEM;
+
+	mutex_init(&ifbdev->hpd_lock);
+	drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
+
+	if (!intel_fbdev_init_bios(dev, ifbdev))
+		ifbdev->preferred_bpp = 32;
+
+	ret = drm_fb_helper_init(dev, &ifbdev->helper, 4);
+	if (ret) {
+		kfree(ifbdev);
+		return ret;
+	}
+
+	dev_priv->fbdev = ifbdev;
+	INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
+
+	drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
+
+	return 0;
+}
+
+static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
+{
+	struct intel_fbdev *ifbdev = data;
+
+	/* Due to peculiar init order wrt to hpd handling this is separate. */
+	if (drm_fb_helper_initial_config(&ifbdev->helper,
+					 ifbdev->preferred_bpp))
+		intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
+}
+
+void intel_fbdev_initial_config_async(struct drm_device *dev)
+{
+	struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
+
+	if (!ifbdev)
+		return;
+
+	ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
+}
+
+static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
+{
+	if (!ifbdev->cookie)
+		return;
+
+	/* Only serialises with all preceding async calls, hence +1 */
+	async_synchronize_cookie(ifbdev->cookie + 1);
+	ifbdev->cookie = 0;
+}
+
+void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbdev *ifbdev = dev_priv->fbdev;
+
+	if (!ifbdev)
+		return;
+
+	cancel_work_sync(&dev_priv->fbdev_suspend_work);
+	if (!current_is_async())
+		intel_fbdev_sync(ifbdev);
+
+	drm_fb_helper_unregister_fbi(&ifbdev->helper);
+}
+
+void intel_fbdev_fini(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
+
+	if (!ifbdev)
+		return;
+
+	intel_fbdev_destroy(ifbdev);
+}
+
+/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
+ * processing, fbdev will perform a full connector reprobe if a hotplug event
+ * was received while HPD was suspended.
+ */
+static void intel_fbdev_hpd_set_suspend(struct intel_fbdev *ifbdev, int state)
+{
+	bool send_hpd = false;
+
+	mutex_lock(&ifbdev->hpd_lock);
+	ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
+	send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
+	ifbdev->hpd_waiting = false;
+	mutex_unlock(&ifbdev->hpd_lock);
+
+	if (send_hpd) {
+		DRM_DEBUG_KMS("Handling delayed fbcon HPD event\n");
+		drm_fb_helper_hotplug_event(&ifbdev->helper);
+	}
+}
+
+void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_fbdev *ifbdev = dev_priv->fbdev;
+	struct fb_info *info;
+
+	if (!ifbdev || !ifbdev->vma)
+		return;
+
+	info = ifbdev->helper.fbdev;
+
+	if (synchronous) {
+		/* Flush any pending work to turn the console on, and then
+		 * wait to turn it off. It must be synchronous as we are
+		 * about to suspend or unload the driver.
+		 *
+		 * Note that from within the work-handler, we cannot flush
+		 * ourselves, so only flush outstanding work upon suspend!
+		 */
+		if (state != FBINFO_STATE_RUNNING)
+			flush_work(&dev_priv->fbdev_suspend_work);
+
+		console_lock();
+	} else {
+		/*
+		 * The console lock can be pretty contented on resume due
+		 * to all the printk activity.  Try to keep it out of the hot
+		 * path of resume if possible.
+		 */
+		WARN_ON(state != FBINFO_STATE_RUNNING);
+		if (!console_trylock()) {
+			/* Don't block our own workqueue as this can
+			 * be run in parallel with other i915.ko tasks.
+			 */
+			schedule_work(&dev_priv->fbdev_suspend_work);
+			return;
+		}
+	}
+
+	/* On resume from hibernation: If the object is shmemfs backed, it has
+	 * been restored from swap. If the object is stolen however, it will be
+	 * full of whatever garbage was left in there.
+	 */
+	if (state == FBINFO_STATE_RUNNING &&
+	    intel_fb_obj(&ifbdev->fb->base)->stolen)
+		memset_io(info->screen_base, 0, info->screen_size);
+
+	drm_fb_helper_set_suspend(&ifbdev->helper, state);
+	console_unlock();
+
+	intel_fbdev_hpd_set_suspend(ifbdev, state);
+}
+
+void intel_fbdev_output_poll_changed(struct drm_device *dev)
+{
+	struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
+	bool send_hpd;
+
+	if (!ifbdev)
+		return;
+
+	intel_fbdev_sync(ifbdev);
+
+	mutex_lock(&ifbdev->hpd_lock);
+	send_hpd = !ifbdev->hpd_suspended;
+	ifbdev->hpd_waiting = true;
+	mutex_unlock(&ifbdev->hpd_lock);
+
+	if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
+		drm_fb_helper_hotplug_event(&ifbdev->helper);
+}
+
+void intel_fbdev_restore_mode(struct drm_device *dev)
+{
+	struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
+
+	if (!ifbdev)
+		return;
+
+	intel_fbdev_sync(ifbdev);
+	if (!ifbdev->vma)
+		return;
+
+	if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
+		intel_fbdev_invalidate(ifbdev);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
new file mode 100644
index 000000000000..de7c84250eb5
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_FBDEV_H__
+#define __INTEL_FBDEV_H__
+
+#include <linux/types.h>
+
+struct drm_device;
+struct drm_i915_private;
+
+#ifdef CONFIG_DRM_FBDEV_EMULATION
+int intel_fbdev_init(struct drm_device *dev);
+void intel_fbdev_initial_config_async(struct drm_device *dev);
+void intel_fbdev_unregister(struct drm_i915_private *dev_priv);
+void intel_fbdev_fini(struct drm_i915_private *dev_priv);
+void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous);
+void intel_fbdev_output_poll_changed(struct drm_device *dev);
+void intel_fbdev_restore_mode(struct drm_device *dev);
+#else
+static inline int intel_fbdev_init(struct drm_device *dev)
+{
+	return 0;
+}
+
+static inline void intel_fbdev_initial_config_async(struct drm_device *dev)
+{
+}
+
+static inline void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
+{
+}
+
+static inline void intel_fbdev_fini(struct drm_i915_private *dev_priv)
+{
+}
+
+static inline void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
+{
+}
+
+static inline void intel_fbdev_output_poll_changed(struct drm_device *dev)
+{
+}
+
+static inline void intel_fbdev_restore_mode(struct drm_device *dev)
+{
+}
+#endif
+
+#endif /* __INTEL_FBDEV_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_fifo_underrun.c b/drivers/gpu/drm/i915/display/intel_fifo_underrun.c
new file mode 100644
index 000000000000..8545ad32bb50
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fifo_underrun.c
@@ -0,0 +1,458 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ */
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
+#include "intel_fifo_underrun.h"
+
+/**
+ * DOC: fifo underrun handling
+ *
+ * The i915 driver checks for display fifo underruns using the interrupt signals
+ * provided by the hardware. This is enabled by default and fairly useful to
+ * debug display issues, especially watermark settings.
+ *
+ * If an underrun is detected this is logged into dmesg. To avoid flooding logs
+ * and occupying the cpu underrun interrupts are disabled after the first
+ * occurrence until the next modeset on a given pipe.
+ *
+ * Note that underrun detection on gmch platforms is a bit more ugly since there
+ * is no interrupt (despite that the signalling bit is in the PIPESTAT pipe
+ * interrupt register). Also on some other platforms underrun interrupts are
+ * shared, which means that if we detect an underrun we need to disable underrun
+ * reporting on all pipes.
+ *
+ * The code also supports underrun detection on the PCH transcoder.
+ */
+
+static bool ivb_can_enable_err_int(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *crtc;
+	enum pipe pipe;
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	for_each_pipe(dev_priv, pipe) {
+		crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+
+		if (crtc->cpu_fifo_underrun_disabled)
+			return false;
+	}
+
+	return true;
+}
+
+static bool cpt_can_enable_serr_int(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe;
+	struct intel_crtc *crtc;
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	for_each_pipe(dev_priv, pipe) {
+		crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+
+		if (crtc->pch_fifo_underrun_disabled)
+			return false;
+	}
+
+	return true;
+}
+
+static void i9xx_check_fifo_underruns(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	i915_reg_t reg = PIPESTAT(crtc->pipe);
+	u32 enable_mask;
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	if ((I915_READ(reg) & PIPE_FIFO_UNDERRUN_STATUS) == 0)
+		return;
+
+	enable_mask = i915_pipestat_enable_mask(dev_priv, crtc->pipe);
+	I915_WRITE(reg, enable_mask | PIPE_FIFO_UNDERRUN_STATUS);
+	POSTING_READ(reg);
+
+	trace_intel_cpu_fifo_underrun(dev_priv, crtc->pipe);
+	DRM_ERROR("pipe %c underrun\n", pipe_name(crtc->pipe));
+}
+
+static void i9xx_set_fifo_underrun_reporting(struct drm_device *dev,
+					     enum pipe pipe,
+					     bool enable, bool old)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	i915_reg_t reg = PIPESTAT(pipe);
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	if (enable) {
+		u32 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
+
+		I915_WRITE(reg, enable_mask | PIPE_FIFO_UNDERRUN_STATUS);
+		POSTING_READ(reg);
+	} else {
+		if (old && I915_READ(reg) & PIPE_FIFO_UNDERRUN_STATUS)
+			DRM_ERROR("pipe %c underrun\n", pipe_name(pipe));
+	}
+}
+
+static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
+						 enum pipe pipe, bool enable)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 bit = (pipe == PIPE_A) ?
+		DE_PIPEA_FIFO_UNDERRUN : DE_PIPEB_FIFO_UNDERRUN;
+
+	if (enable)
+		ilk_enable_display_irq(dev_priv, bit);
+	else
+		ilk_disable_display_irq(dev_priv, bit);
+}
+
+static void ivybridge_check_fifo_underruns(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pipe = crtc->pipe;
+	u32 err_int = I915_READ(GEN7_ERR_INT);
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	if ((err_int & ERR_INT_FIFO_UNDERRUN(pipe)) == 0)
+		return;
+
+	I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
+	POSTING_READ(GEN7_ERR_INT);
+
+	trace_intel_cpu_fifo_underrun(dev_priv, pipe);
+	DRM_ERROR("fifo underrun on pipe %c\n", pipe_name(pipe));
+}
+
+static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
+						  enum pipe pipe,
+						  bool enable, bool old)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	if (enable) {
+		I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
+
+		if (!ivb_can_enable_err_int(dev))
+			return;
+
+		ilk_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
+	} else {
+		ilk_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
+
+		if (old &&
+		    I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe)) {
+			DRM_ERROR("uncleared fifo underrun on pipe %c\n",
+				  pipe_name(pipe));
+		}
+	}
+}
+
+static void broadwell_set_fifo_underrun_reporting(struct drm_device *dev,
+						  enum pipe pipe, bool enable)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	if (enable)
+		bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_FIFO_UNDERRUN);
+	else
+		bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_FIFO_UNDERRUN);
+}
+
+static void ibx_set_fifo_underrun_reporting(struct drm_device *dev,
+					    enum pipe pch_transcoder,
+					    bool enable)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	u32 bit = (pch_transcoder == PIPE_A) ?
+		SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER;
+
+	if (enable)
+		ibx_enable_display_interrupt(dev_priv, bit);
+	else
+		ibx_disable_display_interrupt(dev_priv, bit);
+}
+
+static void cpt_check_pch_fifo_underruns(struct intel_crtc *crtc)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum pipe pch_transcoder = crtc->pipe;
+	u32 serr_int = I915_READ(SERR_INT);
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	if ((serr_int & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder)) == 0)
+		return;
+
+	I915_WRITE(SERR_INT, SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
+	POSTING_READ(SERR_INT);
+
+	trace_intel_pch_fifo_underrun(dev_priv, pch_transcoder);
+	DRM_ERROR("pch fifo underrun on pch transcoder %c\n",
+		  pipe_name(pch_transcoder));
+}
+
+static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
+					    enum pipe pch_transcoder,
+					    bool enable, bool old)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	if (enable) {
+		I915_WRITE(SERR_INT,
+			   SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
+
+		if (!cpt_can_enable_serr_int(dev))
+			return;
+
+		ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
+	} else {
+		ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
+
+		if (old && I915_READ(SERR_INT) &
+		    SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder)) {
+			DRM_ERROR("uncleared pch fifo underrun on pch transcoder %c\n",
+				  pipe_name(pch_transcoder));
+		}
+	}
+}
+
+static bool __intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
+						    enum pipe pipe, bool enable)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+	bool old;
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	old = !crtc->cpu_fifo_underrun_disabled;
+	crtc->cpu_fifo_underrun_disabled = !enable;
+
+	if (HAS_GMCH(dev_priv))
+		i9xx_set_fifo_underrun_reporting(dev, pipe, enable, old);
+	else if (IS_GEN_RANGE(dev_priv, 5, 6))
+		ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
+	else if (IS_GEN(dev_priv, 7))
+		ivybridge_set_fifo_underrun_reporting(dev, pipe, enable, old);
+	else if (INTEL_GEN(dev_priv) >= 8)
+		broadwell_set_fifo_underrun_reporting(dev, pipe, enable);
+
+	return old;
+}
+
+/**
+ * intel_set_cpu_fifo_underrun_reporting - set cpu fifo underrrun reporting state
+ * @dev_priv: i915 device instance
+ * @pipe: (CPU) pipe to set state for
+ * @enable: whether underruns should be reported or not
+ *
+ * This function sets the fifo underrun state for @pipe. It is used in the
+ * modeset code to avoid false positives since on many platforms underruns are
+ * expected when disabling or enabling the pipe.
+ *
+ * Notice that on some platforms disabling underrun reports for one pipe
+ * disables for all due to shared interrupts. Actual reporting is still per-pipe
+ * though.
+ *
+ * Returns the previous state of underrun reporting.
+ */
+bool intel_set_cpu_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
+					   enum pipe pipe, bool enable)
+{
+	unsigned long flags;
+	bool ret;
+
+	spin_lock_irqsave(&dev_priv->irq_lock, flags);
+	ret = __intel_set_cpu_fifo_underrun_reporting(&dev_priv->drm, pipe,
+						      enable);
+	spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
+
+	return ret;
+}
+
+/**
+ * intel_set_pch_fifo_underrun_reporting - set PCH fifo underrun reporting state
+ * @dev_priv: i915 device instance
+ * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
+ * @enable: whether underruns should be reported or not
+ *
+ * This function makes us disable or enable PCH fifo underruns for a specific
+ * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
+ * underrun reporting for one transcoder may also disable all the other PCH
+ * error interruts for the other transcoders, due to the fact that there's just
+ * one interrupt mask/enable bit for all the transcoders.
+ *
+ * Returns the previous state of underrun reporting.
+ */
+bool intel_set_pch_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
+					   enum pipe pch_transcoder,
+					   bool enable)
+{
+	struct intel_crtc *crtc =
+		intel_get_crtc_for_pipe(dev_priv, pch_transcoder);
+	unsigned long flags;
+	bool old;
+
+	/*
+	 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
+	 * has only one pch transcoder A that all pipes can use. To avoid racy
+	 * pch transcoder -> pipe lookups from interrupt code simply store the
+	 * underrun statistics in crtc A. Since we never expose this anywhere
+	 * nor use it outside of the fifo underrun code here using the "wrong"
+	 * crtc on LPT won't cause issues.
+	 */
+
+	spin_lock_irqsave(&dev_priv->irq_lock, flags);
+
+	old = !crtc->pch_fifo_underrun_disabled;
+	crtc->pch_fifo_underrun_disabled = !enable;
+
+	if (HAS_PCH_IBX(dev_priv))
+		ibx_set_fifo_underrun_reporting(&dev_priv->drm,
+						pch_transcoder,
+						enable);
+	else
+		cpt_set_fifo_underrun_reporting(&dev_priv->drm,
+						pch_transcoder,
+						enable, old);
+
+	spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
+	return old;
+}
+
+/**
+ * intel_cpu_fifo_underrun_irq_handler - handle CPU fifo underrun interrupt
+ * @dev_priv: i915 device instance
+ * @pipe: (CPU) pipe to set state for
+ *
+ * This handles a CPU fifo underrun interrupt, generating an underrun warning
+ * into dmesg if underrun reporting is enabled and then disables the underrun
+ * interrupt to avoid an irq storm.
+ */
+void intel_cpu_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
+					 enum pipe pipe)
+{
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
+
+	/* We may be called too early in init, thanks BIOS! */
+	if (crtc == NULL)
+		return;
+
+	/* GMCH can't disable fifo underruns, filter them. */
+	if (HAS_GMCH(dev_priv) &&
+	    crtc->cpu_fifo_underrun_disabled)
+		return;
+
+	if (intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false)) {
+		trace_intel_cpu_fifo_underrun(dev_priv, pipe);
+		DRM_ERROR("CPU pipe %c FIFO underrun\n",
+			  pipe_name(pipe));
+	}
+
+	intel_fbc_handle_fifo_underrun_irq(dev_priv);
+}
+
+/**
+ * intel_pch_fifo_underrun_irq_handler - handle PCH fifo underrun interrupt
+ * @dev_priv: i915 device instance
+ * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
+ *
+ * This handles a PCH fifo underrun interrupt, generating an underrun warning
+ * into dmesg if underrun reporting is enabled and then disables the underrun
+ * interrupt to avoid an irq storm.
+ */
+void intel_pch_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
+					 enum pipe pch_transcoder)
+{
+	if (intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder,
+						  false)) {
+		trace_intel_pch_fifo_underrun(dev_priv, pch_transcoder);
+		DRM_ERROR("PCH transcoder %c FIFO underrun\n",
+			  pipe_name(pch_transcoder));
+	}
+}
+
+/**
+ * intel_check_cpu_fifo_underruns - check for CPU fifo underruns immediately
+ * @dev_priv: i915 device instance
+ *
+ * Check for CPU fifo underruns immediately. Useful on IVB/HSW where the shared
+ * error interrupt may have been disabled, and so CPU fifo underruns won't
+ * necessarily raise an interrupt, and on GMCH platforms where underruns never
+ * raise an interrupt.
+ */
+void intel_check_cpu_fifo_underruns(struct drm_i915_private *dev_priv)
+{
+	struct intel_crtc *crtc;
+
+	spin_lock_irq(&dev_priv->irq_lock);
+
+	for_each_intel_crtc(&dev_priv->drm, crtc) {
+		if (crtc->cpu_fifo_underrun_disabled)
+			continue;
+
+		if (HAS_GMCH(dev_priv))
+			i9xx_check_fifo_underruns(crtc);
+		else if (IS_GEN(dev_priv, 7))
+			ivybridge_check_fifo_underruns(crtc);
+	}
+
+	spin_unlock_irq(&dev_priv->irq_lock);
+}
+
+/**
+ * intel_check_pch_fifo_underruns - check for PCH fifo underruns immediately
+ * @dev_priv: i915 device instance
+ *
+ * Check for PCH fifo underruns immediately. Useful on CPT/PPT where the shared
+ * error interrupt may have been disabled, and so PCH fifo underruns won't
+ * necessarily raise an interrupt.
+ */
+void intel_check_pch_fifo_underruns(struct drm_i915_private *dev_priv)
+{
+	struct intel_crtc *crtc;
+
+	spin_lock_irq(&dev_priv->irq_lock);
+
+	for_each_intel_crtc(&dev_priv->drm, crtc) {
+		if (crtc->pch_fifo_underrun_disabled)
+			continue;
+
+		if (HAS_PCH_CPT(dev_priv))
+			cpt_check_pch_fifo_underruns(crtc);
+	}
+
+	spin_unlock_irq(&dev_priv->irq_lock);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_fifo_underrun.h b/drivers/gpu/drm/i915/display/intel_fifo_underrun.h
new file mode 100644
index 000000000000..e04f22ac1f49
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_fifo_underrun.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_FIFO_UNDERRUN_H__
+#define __INTEL_FIFO_UNDERRUN_H__
+
+#include <linux/types.h>
+
+#include "intel_display.h"
+
+struct drm_i915_private;
+
+bool intel_set_cpu_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
+					   enum pipe pipe, bool enable);
+bool intel_set_pch_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
+					   enum pipe pch_transcoder,
+					   bool enable);
+void intel_cpu_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
+					 enum pipe pipe);
+void intel_pch_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
+					 enum pipe pch_transcoder);
+void intel_check_cpu_fifo_underruns(struct drm_i915_private *dev_priv);
+void intel_check_pch_fifo_underruns(struct drm_i915_private *dev_priv);
+
+#endif /* __INTEL_FIFO_UNDERRUN_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.c b/drivers/gpu/drm/i915/display/intel_frontbuffer.c
new file mode 100644
index 000000000000..44273c10cea5
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *	Daniel Vetter <daniel.vetter@ffwll.ch>
+ */
+
+/**
+ * DOC: frontbuffer tracking
+ *
+ * Many features require us to track changes to the currently active
+ * frontbuffer, especially rendering targeted at the frontbuffer.
+ *
+ * To be able to do so GEM tracks frontbuffers using a bitmask for all possible
+ * frontbuffer slots through i915_gem_track_fb(). The function in this file are
+ * then called when the contents of the frontbuffer are invalidated, when
+ * frontbuffer rendering has stopped again to flush out all the changes and when
+ * the frontbuffer is exchanged with a flip. Subsystems interested in
+ * frontbuffer changes (e.g. PSR, FBC, DRRS) should directly put their callbacks
+ * into the relevant places and filter for the frontbuffer slots that they are
+ * interested int.
+ *
+ * On a high level there are two types of powersaving features. The first one
+ * work like a special cache (FBC and PSR) and are interested when they should
+ * stop caching and when to restart caching. This is done by placing callbacks
+ * into the invalidate and the flush functions: At invalidate the caching must
+ * be stopped and at flush time it can be restarted. And maybe they need to know
+ * when the frontbuffer changes (e.g. when the hw doesn't initiate an invalidate
+ * and flush on its own) which can be achieved with placing callbacks into the
+ * flip functions.
+ *
+ * The other type of display power saving feature only cares about busyness
+ * (e.g. DRRS). In that case all three (invalidate, flush and flip) indicate
+ * busyness. There is no direct way to detect idleness. Instead an idle timer
+ * work delayed work should be started from the flush and flip functions and
+ * cancelled as soon as busyness is detected.
+ */
+
+#include "display/intel_dp.h"
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_fbc.h"
+#include "intel_frontbuffer.h"
+#include "intel_psr.h"
+
+void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
+			       enum fb_op_origin origin,
+			       unsigned int frontbuffer_bits)
+{
+	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
+
+	if (origin == ORIGIN_CS) {
+		spin_lock(&dev_priv->fb_tracking.lock);
+		dev_priv->fb_tracking.busy_bits |= frontbuffer_bits;
+		dev_priv->fb_tracking.flip_bits &= ~frontbuffer_bits;
+		spin_unlock(&dev_priv->fb_tracking.lock);
+	}
+
+	might_sleep();
+	intel_psr_invalidate(dev_priv, frontbuffer_bits, origin);
+	intel_edp_drrs_invalidate(dev_priv, frontbuffer_bits);
+	intel_fbc_invalidate(dev_priv, frontbuffer_bits, origin);
+}
+
+/**
+ * intel_frontbuffer_flush - flush frontbuffer
+ * @dev_priv: i915 device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
+ * @origin: which operation caused the flush
+ *
+ * This function gets called every time rendering on the given planes has
+ * completed and frontbuffer caching can be started again. Flushes will get
+ * delayed if they're blocked by some outstanding asynchronous rendering.
+ *
+ * Can be called without any locks held.
+ */
+static void intel_frontbuffer_flush(struct drm_i915_private *dev_priv,
+				    unsigned frontbuffer_bits,
+				    enum fb_op_origin origin)
+{
+	/* Delay flushing when rings are still busy.*/
+	spin_lock(&dev_priv->fb_tracking.lock);
+	frontbuffer_bits &= ~dev_priv->fb_tracking.busy_bits;
+	spin_unlock(&dev_priv->fb_tracking.lock);
+
+	if (!frontbuffer_bits)
+		return;
+
+	might_sleep();
+	intel_edp_drrs_flush(dev_priv, frontbuffer_bits);
+	intel_psr_flush(dev_priv, frontbuffer_bits, origin);
+	intel_fbc_flush(dev_priv, frontbuffer_bits, origin);
+}
+
+void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
+			  enum fb_op_origin origin,
+			  unsigned int frontbuffer_bits)
+{
+	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
+
+	if (origin == ORIGIN_CS) {
+		spin_lock(&dev_priv->fb_tracking.lock);
+		/* Filter out new bits since rendering started. */
+		frontbuffer_bits &= dev_priv->fb_tracking.busy_bits;
+		dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits;
+		spin_unlock(&dev_priv->fb_tracking.lock);
+	}
+
+	if (frontbuffer_bits)
+		intel_frontbuffer_flush(dev_priv, frontbuffer_bits, origin);
+}
+
+/**
+ * intel_frontbuffer_flip_prepare - prepare asynchronous frontbuffer flip
+ * @dev_priv: i915 device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
+ *
+ * This function gets called after scheduling a flip on @obj. The actual
+ * frontbuffer flushing will be delayed until completion is signalled with
+ * intel_frontbuffer_flip_complete. If an invalidate happens in between this
+ * flush will be cancelled.
+ *
+ * Can be called without any locks held.
+ */
+void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
+				    unsigned frontbuffer_bits)
+{
+	spin_lock(&dev_priv->fb_tracking.lock);
+	dev_priv->fb_tracking.flip_bits |= frontbuffer_bits;
+	/* Remove stale busy bits due to the old buffer. */
+	dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits;
+	spin_unlock(&dev_priv->fb_tracking.lock);
+}
+
+/**
+ * intel_frontbuffer_flip_complete - complete asynchronous frontbuffer flip
+ * @dev_priv: i915 device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
+ *
+ * This function gets called after the flip has been latched and will complete
+ * on the next vblank. It will execute the flush if it hasn't been cancelled yet.
+ *
+ * Can be called without any locks held.
+ */
+void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
+				     unsigned frontbuffer_bits)
+{
+	spin_lock(&dev_priv->fb_tracking.lock);
+	/* Mask any cancelled flips. */
+	frontbuffer_bits &= dev_priv->fb_tracking.flip_bits;
+	dev_priv->fb_tracking.flip_bits &= ~frontbuffer_bits;
+	spin_unlock(&dev_priv->fb_tracking.lock);
+
+	if (frontbuffer_bits)
+		intel_frontbuffer_flush(dev_priv,
+					frontbuffer_bits, ORIGIN_FLIP);
+}
+
+/**
+ * intel_frontbuffer_flip - synchronous frontbuffer flip
+ * @dev_priv: i915 device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
+ *
+ * This function gets called after scheduling a flip on @obj. This is for
+ * synchronous plane updates which will happen on the next vblank and which will
+ * not get delayed by pending gpu rendering.
+ *
+ * Can be called without any locks held.
+ */
+void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
+			    unsigned frontbuffer_bits)
+{
+	spin_lock(&dev_priv->fb_tracking.lock);
+	/* Remove stale busy bits due to the old buffer. */
+	dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits;
+	spin_unlock(&dev_priv->fb_tracking.lock);
+
+	intel_frontbuffer_flush(dev_priv, frontbuffer_bits, ORIGIN_FLIP);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.h b/drivers/gpu/drm/i915/display/intel_frontbuffer.h
new file mode 100644
index 000000000000..5727320c8084
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2014-2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef __INTEL_FRONTBUFFER_H__
+#define __INTEL_FRONTBUFFER_H__
+
+#include "gem/i915_gem_object.h"
+
+struct drm_i915_private;
+struct drm_i915_gem_object;
+
+enum fb_op_origin {
+	ORIGIN_GTT,
+	ORIGIN_CPU,
+	ORIGIN_CS,
+	ORIGIN_FLIP,
+	ORIGIN_DIRTYFB,
+};
+
+void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
+				    unsigned frontbuffer_bits);
+void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
+				     unsigned frontbuffer_bits);
+void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
+			    unsigned frontbuffer_bits);
+
+void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
+			       enum fb_op_origin origin,
+			       unsigned int frontbuffer_bits);
+void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
+			  enum fb_op_origin origin,
+			  unsigned int frontbuffer_bits);
+
+/**
+ * intel_fb_obj_invalidate - invalidate frontbuffer object
+ * @obj: GEM object to invalidate
+ * @origin: which operation caused the invalidation
+ *
+ * This function gets called every time rendering on the given object starts and
+ * frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
+ * be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
+ * until the rendering completes or a flip on this frontbuffer plane is
+ * scheduled.
+ */
+static inline bool intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
+					   enum fb_op_origin origin)
+{
+	unsigned int frontbuffer_bits;
+
+	frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
+	if (!frontbuffer_bits)
+		return false;
+
+	__intel_fb_obj_invalidate(obj, origin, frontbuffer_bits);
+	return true;
+}
+
+/**
+ * intel_fb_obj_flush - flush frontbuffer object
+ * @obj: GEM object to flush
+ * @origin: which operation caused the flush
+ *
+ * This function gets called every time rendering on the given object has
+ * completed and frontbuffer caching can be started again.
+ */
+static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
+				      enum fb_op_origin origin)
+{
+	unsigned int frontbuffer_bits;
+
+	frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
+	if (!frontbuffer_bits)
+		return;
+
+	__intel_fb_obj_flush(obj, origin, frontbuffer_bits);
+}
+
+#endif /* __INTEL_FRONTBUFFER_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
new file mode 100644
index 000000000000..bc3a94d491c4
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -0,0 +1,1977 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright (C) 2017 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@chromium.org>
+ */
+
+#include <linux/component.h>
+#include <linux/i2c.h>
+#include <linux/random.h>
+
+#include <drm/drm_hdcp.h>
+#include <drm/i915_component.h>
+
+#include "i915_reg.h"
+#include "intel_drv.h"
+#include "intel_hdcp.h"
+#include "intel_sideband.h"
+
+#define KEY_LOAD_TRIES	5
+#define ENCRYPT_STATUS_CHANGE_TIMEOUT_MS	50
+#define HDCP2_LC_RETRY_CNT			3
+
+static
+bool intel_hdcp_is_ksv_valid(u8 *ksv)
+{
+	int i, ones = 0;
+	/* KSV has 20 1's and 20 0's */
+	for (i = 0; i < DRM_HDCP_KSV_LEN; i++)
+		ones += hweight8(ksv[i]);
+	if (ones != 20)
+		return false;
+
+	return true;
+}
+
+static
+int intel_hdcp_read_valid_bksv(struct intel_digital_port *intel_dig_port,
+			       const struct intel_hdcp_shim *shim, u8 *bksv)
+{
+	int ret, i, tries = 2;
+
+	/* HDCP spec states that we must retry the bksv if it is invalid */
+	for (i = 0; i < tries; i++) {
+		ret = shim->read_bksv(intel_dig_port, bksv);
+		if (ret)
+			return ret;
+		if (intel_hdcp_is_ksv_valid(bksv))
+			break;
+	}
+	if (i == tries) {
+		DRM_DEBUG_KMS("Bksv is invalid\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/* Is HDCP1.4 capable on Platform and Sink */
+bool intel_hdcp_capable(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	const struct intel_hdcp_shim *shim = connector->hdcp.shim;
+	bool capable = false;
+	u8 bksv[5];
+
+	if (!shim)
+		return capable;
+
+	if (shim->hdcp_capable) {
+		shim->hdcp_capable(intel_dig_port, &capable);
+	} else {
+		if (!intel_hdcp_read_valid_bksv(intel_dig_port, shim, bksv))
+			capable = true;
+	}
+
+	return capable;
+}
+
+/* Is HDCP2.2 capable on Platform and Sink */
+bool intel_hdcp2_capable(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	bool capable = false;
+
+	/* I915 support for HDCP2.2 */
+	if (!hdcp->hdcp2_supported)
+		return false;
+
+	/* MEI interface is solid */
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	if (!dev_priv->hdcp_comp_added ||  !dev_priv->hdcp_master) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return false;
+	}
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	/* Sink's capability for HDCP2.2 */
+	hdcp->shim->hdcp_2_2_capable(intel_dig_port, &capable);
+
+	return capable;
+}
+
+static inline bool intel_hdcp_in_use(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	enum port port = connector->encoder->port;
+	u32 reg;
+
+	reg = I915_READ(PORT_HDCP_STATUS(port));
+	return reg & HDCP_STATUS_ENC;
+}
+
+static inline bool intel_hdcp2_in_use(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	enum port port = connector->encoder->port;
+	u32 reg;
+
+	reg = I915_READ(HDCP2_STATUS_DDI(port));
+	return reg & LINK_ENCRYPTION_STATUS;
+}
+
+static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port,
+				    const struct intel_hdcp_shim *shim)
+{
+	int ret, read_ret;
+	bool ksv_ready;
+
+	/* Poll for ksv list ready (spec says max time allowed is 5s) */
+	ret = __wait_for(read_ret = shim->read_ksv_ready(intel_dig_port,
+							 &ksv_ready),
+			 read_ret || ksv_ready, 5 * 1000 * 1000, 1000,
+			 100 * 1000);
+	if (ret)
+		return ret;
+	if (read_ret)
+		return read_ret;
+	if (!ksv_ready)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static bool hdcp_key_loadable(struct drm_i915_private *dev_priv)
+{
+	struct i915_power_domains *power_domains = &dev_priv->power_domains;
+	struct i915_power_well *power_well;
+	enum i915_power_well_id id;
+	bool enabled = false;
+
+	/*
+	 * On HSW and BDW, Display HW loads the Key as soon as Display resumes.
+	 * On all BXT+, SW can load the keys only when the PW#1 is turned on.
+	 */
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		id = HSW_DISP_PW_GLOBAL;
+	else
+		id = SKL_DISP_PW_1;
+
+	mutex_lock(&power_domains->lock);
+
+	/* PG1 (power well #1) needs to be enabled */
+	for_each_power_well(dev_priv, power_well) {
+		if (power_well->desc->id == id) {
+			enabled = power_well->desc->ops->is_enabled(dev_priv,
+								    power_well);
+			break;
+		}
+	}
+	mutex_unlock(&power_domains->lock);
+
+	/*
+	 * Another req for hdcp key loadability is enabled state of pll for
+	 * cdclk. Without active crtc we wont land here. So we are assuming that
+	 * cdclk is already on.
+	 */
+
+	return enabled;
+}
+
+static void intel_hdcp_clear_keys(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(HDCP_KEY_CONF, HDCP_CLEAR_KEYS_TRIGGER);
+	I915_WRITE(HDCP_KEY_STATUS, HDCP_KEY_LOAD_DONE | HDCP_KEY_LOAD_STATUS |
+		   HDCP_FUSE_IN_PROGRESS | HDCP_FUSE_ERROR | HDCP_FUSE_DONE);
+}
+
+static int intel_hdcp_load_keys(struct drm_i915_private *dev_priv)
+{
+	int ret;
+	u32 val;
+
+	val = I915_READ(HDCP_KEY_STATUS);
+	if ((val & HDCP_KEY_LOAD_DONE) && (val & HDCP_KEY_LOAD_STATUS))
+		return 0;
+
+	/*
+	 * On HSW and BDW HW loads the HDCP1.4 Key when Display comes
+	 * out of reset. So if Key is not already loaded, its an error state.
+	 */
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		if (!(I915_READ(HDCP_KEY_STATUS) & HDCP_KEY_LOAD_DONE))
+			return -ENXIO;
+
+	/*
+	 * Initiate loading the HDCP key from fuses.
+	 *
+	 * BXT+ platforms, HDCP key needs to be loaded by SW. Only Gen 9
+	 * platforms except BXT and GLK, differ in the key load trigger process
+	 * from other platforms. So GEN9_BC uses the GT Driver Mailbox i/f.
+	 */
+	if (IS_GEN9_BC(dev_priv)) {
+		ret = sandybridge_pcode_write(dev_priv,
+					      SKL_PCODE_LOAD_HDCP_KEYS, 1);
+		if (ret) {
+			DRM_ERROR("Failed to initiate HDCP key load (%d)\n",
+			          ret);
+			return ret;
+		}
+	} else {
+		I915_WRITE(HDCP_KEY_CONF, HDCP_KEY_LOAD_TRIGGER);
+	}
+
+	/* Wait for the keys to load (500us) */
+	ret = __intel_wait_for_register(&dev_priv->uncore, HDCP_KEY_STATUS,
+					HDCP_KEY_LOAD_DONE, HDCP_KEY_LOAD_DONE,
+					10, 1, &val);
+	if (ret)
+		return ret;
+	else if (!(val & HDCP_KEY_LOAD_STATUS))
+		return -ENXIO;
+
+	/* Send Aksv over to PCH display for use in authentication */
+	I915_WRITE(HDCP_KEY_CONF, HDCP_AKSV_SEND_TRIGGER);
+
+	return 0;
+}
+
+/* Returns updated SHA-1 index */
+static int intel_write_sha_text(struct drm_i915_private *dev_priv, u32 sha_text)
+{
+	I915_WRITE(HDCP_SHA_TEXT, sha_text);
+	if (intel_wait_for_register(&dev_priv->uncore, HDCP_REP_CTL,
+				    HDCP_SHA1_READY, HDCP_SHA1_READY, 1)) {
+		DRM_ERROR("Timed out waiting for SHA1 ready\n");
+		return -ETIMEDOUT;
+	}
+	return 0;
+}
+
+static
+u32 intel_hdcp_get_repeater_ctl(struct intel_digital_port *intel_dig_port)
+{
+	enum port port = intel_dig_port->base.port;
+	switch (port) {
+	case PORT_A:
+		return HDCP_DDIA_REP_PRESENT | HDCP_DDIA_SHA1_M0;
+	case PORT_B:
+		return HDCP_DDIB_REP_PRESENT | HDCP_DDIB_SHA1_M0;
+	case PORT_C:
+		return HDCP_DDIC_REP_PRESENT | HDCP_DDIC_SHA1_M0;
+	case PORT_D:
+		return HDCP_DDID_REP_PRESENT | HDCP_DDID_SHA1_M0;
+	case PORT_E:
+		return HDCP_DDIE_REP_PRESENT | HDCP_DDIE_SHA1_M0;
+	default:
+		break;
+	}
+	DRM_ERROR("Unknown port %d\n", port);
+	return -EINVAL;
+}
+
+static
+int intel_hdcp_validate_v_prime(struct intel_digital_port *intel_dig_port,
+				const struct intel_hdcp_shim *shim,
+				u8 *ksv_fifo, u8 num_downstream, u8 *bstatus)
+{
+	struct drm_i915_private *dev_priv;
+	u32 vprime, sha_text, sha_leftovers, rep_ctl;
+	int ret, i, j, sha_idx;
+
+	dev_priv = intel_dig_port->base.base.dev->dev_private;
+
+	/* Process V' values from the receiver */
+	for (i = 0; i < DRM_HDCP_V_PRIME_NUM_PARTS; i++) {
+		ret = shim->read_v_prime_part(intel_dig_port, i, &vprime);
+		if (ret)
+			return ret;
+		I915_WRITE(HDCP_SHA_V_PRIME(i), vprime);
+	}
+
+	/*
+	 * We need to write the concatenation of all device KSVs, BINFO (DP) ||
+	 * BSTATUS (HDMI), and M0 (which is added via HDCP_REP_CTL). This byte
+	 * stream is written via the HDCP_SHA_TEXT register in 32-bit
+	 * increments. Every 64 bytes, we need to write HDCP_REP_CTL again. This
+	 * index will keep track of our progress through the 64 bytes as well as
+	 * helping us work the 40-bit KSVs through our 32-bit register.
+	 *
+	 * NOTE: data passed via HDCP_SHA_TEXT should be big-endian
+	 */
+	sha_idx = 0;
+	sha_text = 0;
+	sha_leftovers = 0;
+	rep_ctl = intel_hdcp_get_repeater_ctl(intel_dig_port);
+	I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_32);
+	for (i = 0; i < num_downstream; i++) {
+		unsigned int sha_empty;
+		u8 *ksv = &ksv_fifo[i * DRM_HDCP_KSV_LEN];
+
+		/* Fill up the empty slots in sha_text and write it out */
+		sha_empty = sizeof(sha_text) - sha_leftovers;
+		for (j = 0; j < sha_empty; j++)
+			sha_text |= ksv[j] << ((sizeof(sha_text) - j - 1) * 8);
+
+		ret = intel_write_sha_text(dev_priv, sha_text);
+		if (ret < 0)
+			return ret;
+
+		/* Programming guide writes this every 64 bytes */
+		sha_idx += sizeof(sha_text);
+		if (!(sha_idx % 64))
+			I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_32);
+
+		/* Store the leftover bytes from the ksv in sha_text */
+		sha_leftovers = DRM_HDCP_KSV_LEN - sha_empty;
+		sha_text = 0;
+		for (j = 0; j < sha_leftovers; j++)
+			sha_text |= ksv[sha_empty + j] <<
+					((sizeof(sha_text) - j - 1) * 8);
+
+		/*
+		 * If we still have room in sha_text for more data, continue.
+		 * Otherwise, write it out immediately.
+		 */
+		if (sizeof(sha_text) > sha_leftovers)
+			continue;
+
+		ret = intel_write_sha_text(dev_priv, sha_text);
+		if (ret < 0)
+			return ret;
+		sha_leftovers = 0;
+		sha_text = 0;
+		sha_idx += sizeof(sha_text);
+	}
+
+	/*
+	 * We need to write BINFO/BSTATUS, and M0 now. Depending on how many
+	 * bytes are leftover from the last ksv, we might be able to fit them
+	 * all in sha_text (first 2 cases), or we might need to split them up
+	 * into 2 writes (last 2 cases).
+	 */
+	if (sha_leftovers == 0) {
+		/* Write 16 bits of text, 16 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_16);
+		ret = intel_write_sha_text(dev_priv,
+					   bstatus[0] << 8 | bstatus[1]);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 32 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_0);
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 16 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_16);
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+	} else if (sha_leftovers == 1) {
+		/* Write 24 bits of text, 8 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_24);
+		sha_text |= bstatus[0] << 16 | bstatus[1] << 8;
+		/* Only 24-bits of data, must be in the LSB */
+		sha_text = (sha_text & 0xffffff00) >> 8;
+		ret = intel_write_sha_text(dev_priv, sha_text);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 32 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_0);
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 24 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_8);
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+	} else if (sha_leftovers == 2) {
+		/* Write 32 bits of text */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_32);
+		sha_text |= bstatus[0] << 24 | bstatus[1] << 16;
+		ret = intel_write_sha_text(dev_priv, sha_text);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 64 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_0);
+		for (i = 0; i < 2; i++) {
+			ret = intel_write_sha_text(dev_priv, 0);
+			if (ret < 0)
+				return ret;
+			sha_idx += sizeof(sha_text);
+		}
+	} else if (sha_leftovers == 3) {
+		/* Write 32 bits of text */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_32);
+		sha_text |= bstatus[0] << 24;
+		ret = intel_write_sha_text(dev_priv, sha_text);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 8 bits of text, 24 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_8);
+		ret = intel_write_sha_text(dev_priv, bstatus[1]);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 32 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_0);
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+
+		/* Write 8 bits of M0 */
+		I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_24);
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+	} else {
+		DRM_DEBUG_KMS("Invalid number of leftovers %d\n",
+			      sha_leftovers);
+		return -EINVAL;
+	}
+
+	I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_TEXT_32);
+	/* Fill up to 64-4 bytes with zeros (leave the last write for length) */
+	while ((sha_idx % 64) < (64 - sizeof(sha_text))) {
+		ret = intel_write_sha_text(dev_priv, 0);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
+	}
+
+	/*
+	 * Last write gets the length of the concatenation in bits. That is:
+	 *  - 5 bytes per device
+	 *  - 10 bytes for BINFO/BSTATUS(2), M0(8)
+	 */
+	sha_text = (num_downstream * 5 + 10) * 8;
+	ret = intel_write_sha_text(dev_priv, sha_text);
+	if (ret < 0)
+		return ret;
+
+	/* Tell the HW we're done with the hash and wait for it to ACK */
+	I915_WRITE(HDCP_REP_CTL, rep_ctl | HDCP_SHA1_COMPLETE_HASH);
+	if (intel_wait_for_register(&dev_priv->uncore, HDCP_REP_CTL,
+				    HDCP_SHA1_COMPLETE,
+				    HDCP_SHA1_COMPLETE, 1)) {
+		DRM_ERROR("Timed out waiting for SHA1 complete\n");
+		return -ETIMEDOUT;
+	}
+	if (!(I915_READ(HDCP_REP_CTL) & HDCP_SHA1_V_MATCH)) {
+		DRM_DEBUG_KMS("SHA-1 mismatch, HDCP failed\n");
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+/* Implements Part 2 of the HDCP authorization procedure */
+static
+int intel_hdcp_auth_downstream(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	const struct intel_hdcp_shim *shim = connector->hdcp.shim;
+	struct drm_device *dev = connector->base.dev;
+	u8 bstatus[2], num_downstream, *ksv_fifo;
+	int ret, i, tries = 3;
+
+	ret = intel_hdcp_poll_ksv_fifo(intel_dig_port, shim);
+	if (ret) {
+		DRM_DEBUG_KMS("KSV list failed to become ready (%d)\n", ret);
+		return ret;
+	}
+
+	ret = shim->read_bstatus(intel_dig_port, bstatus);
+	if (ret)
+		return ret;
+
+	if (DRM_HDCP_MAX_DEVICE_EXCEEDED(bstatus[0]) ||
+	    DRM_HDCP_MAX_CASCADE_EXCEEDED(bstatus[1])) {
+		DRM_DEBUG_KMS("Max Topology Limit Exceeded\n");
+		return -EPERM;
+	}
+
+	/*
+	 * When repeater reports 0 device count, HDCP1.4 spec allows disabling
+	 * the HDCP encryption. That implies that repeater can't have its own
+	 * display. As there is no consumption of encrypted content in the
+	 * repeater with 0 downstream devices, we are failing the
+	 * authentication.
+	 */
+	num_downstream = DRM_HDCP_NUM_DOWNSTREAM(bstatus[0]);
+	if (num_downstream == 0)
+		return -EINVAL;
+
+	ksv_fifo = kcalloc(DRM_HDCP_KSV_LEN, num_downstream, GFP_KERNEL);
+	if (!ksv_fifo)
+		return -ENOMEM;
+
+	ret = shim->read_ksv_fifo(intel_dig_port, num_downstream, ksv_fifo);
+	if (ret)
+		goto err;
+
+	if (drm_hdcp_check_ksvs_revoked(dev, ksv_fifo, num_downstream)) {
+		DRM_ERROR("Revoked Ksv(s) in ksv_fifo\n");
+		return -EPERM;
+	}
+
+	/*
+	 * When V prime mismatches, DP Spec mandates re-read of
+	 * V prime atleast twice.
+	 */
+	for (i = 0; i < tries; i++) {
+		ret = intel_hdcp_validate_v_prime(intel_dig_port, shim,
+						  ksv_fifo, num_downstream,
+						  bstatus);
+		if (!ret)
+			break;
+	}
+
+	if (i == tries) {
+		DRM_DEBUG_KMS("V Prime validation failed.(%d)\n", ret);
+		goto err;
+	}
+
+	DRM_DEBUG_KMS("HDCP is enabled (%d downstream devices)\n",
+		      num_downstream);
+	ret = 0;
+err:
+	kfree(ksv_fifo);
+	return ret;
+}
+
+/* Implements Part 1 of the HDCP authorization procedure */
+static int intel_hdcp_auth(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct drm_device *dev = connector->base.dev;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	struct drm_i915_private *dev_priv;
+	enum port port;
+	unsigned long r0_prime_gen_start;
+	int ret, i, tries = 2;
+	union {
+		u32 reg[2];
+		u8 shim[DRM_HDCP_AN_LEN];
+	} an;
+	union {
+		u32 reg[2];
+		u8 shim[DRM_HDCP_KSV_LEN];
+	} bksv;
+	union {
+		u32 reg;
+		u8 shim[DRM_HDCP_RI_LEN];
+	} ri;
+	bool repeater_present, hdcp_capable;
+
+	dev_priv = intel_dig_port->base.base.dev->dev_private;
+
+	port = intel_dig_port->base.port;
+
+	/*
+	 * Detects whether the display is HDCP capable. Although we check for
+	 * valid Bksv below, the HDCP over DP spec requires that we check
+	 * whether the display supports HDCP before we write An. For HDMI
+	 * displays, this is not necessary.
+	 */
+	if (shim->hdcp_capable) {
+		ret = shim->hdcp_capable(intel_dig_port, &hdcp_capable);
+		if (ret)
+			return ret;
+		if (!hdcp_capable) {
+			DRM_DEBUG_KMS("Panel is not HDCP capable\n");
+			return -EINVAL;
+		}
+	}
+
+	/* Initialize An with 2 random values and acquire it */
+	for (i = 0; i < 2; i++)
+		I915_WRITE(PORT_HDCP_ANINIT(port), get_random_u32());
+	I915_WRITE(PORT_HDCP_CONF(port), HDCP_CONF_CAPTURE_AN);
+
+	/* Wait for An to be acquired */
+	if (intel_wait_for_register(&dev_priv->uncore, PORT_HDCP_STATUS(port),
+				    HDCP_STATUS_AN_READY,
+				    HDCP_STATUS_AN_READY, 1)) {
+		DRM_ERROR("Timed out waiting for An\n");
+		return -ETIMEDOUT;
+	}
+
+	an.reg[0] = I915_READ(PORT_HDCP_ANLO(port));
+	an.reg[1] = I915_READ(PORT_HDCP_ANHI(port));
+	ret = shim->write_an_aksv(intel_dig_port, an.shim);
+	if (ret)
+		return ret;
+
+	r0_prime_gen_start = jiffies;
+
+	memset(&bksv, 0, sizeof(bksv));
+
+	ret = intel_hdcp_read_valid_bksv(intel_dig_port, shim, bksv.shim);
+	if (ret < 0)
+		return ret;
+
+	if (drm_hdcp_check_ksvs_revoked(dev, bksv.shim, 1)) {
+		DRM_ERROR("BKSV is revoked\n");
+		return -EPERM;
+	}
+
+	I915_WRITE(PORT_HDCP_BKSVLO(port), bksv.reg[0]);
+	I915_WRITE(PORT_HDCP_BKSVHI(port), bksv.reg[1]);
+
+	ret = shim->repeater_present(intel_dig_port, &repeater_present);
+	if (ret)
+		return ret;
+	if (repeater_present)
+		I915_WRITE(HDCP_REP_CTL,
+			   intel_hdcp_get_repeater_ctl(intel_dig_port));
+
+	ret = shim->toggle_signalling(intel_dig_port, true);
+	if (ret)
+		return ret;
+
+	I915_WRITE(PORT_HDCP_CONF(port), HDCP_CONF_AUTH_AND_ENC);
+
+	/* Wait for R0 ready */
+	if (wait_for(I915_READ(PORT_HDCP_STATUS(port)) &
+		     (HDCP_STATUS_R0_READY | HDCP_STATUS_ENC), 1)) {
+		DRM_ERROR("Timed out waiting for R0 ready\n");
+		return -ETIMEDOUT;
+	}
+
+	/*
+	 * Wait for R0' to become available. The spec says 100ms from Aksv, but
+	 * some monitors can take longer than this. We'll set the timeout at
+	 * 300ms just to be sure.
+	 *
+	 * On DP, there's an R0_READY bit available but no such bit
+	 * exists on HDMI. Since the upper-bound is the same, we'll just do
+	 * the stupid thing instead of polling on one and not the other.
+	 */
+	wait_remaining_ms_from_jiffies(r0_prime_gen_start, 300);
+
+	tries = 3;
+
+	/*
+	 * DP HDCP Spec mandates the two more reattempt to read R0, incase
+	 * of R0 mismatch.
+	 */
+	for (i = 0; i < tries; i++) {
+		ri.reg = 0;
+		ret = shim->read_ri_prime(intel_dig_port, ri.shim);
+		if (ret)
+			return ret;
+		I915_WRITE(PORT_HDCP_RPRIME(port), ri.reg);
+
+		/* Wait for Ri prime match */
+		if (!wait_for(I915_READ(PORT_HDCP_STATUS(port)) &
+		    (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC), 1))
+			break;
+	}
+
+	if (i == tries) {
+		DRM_DEBUG_KMS("Timed out waiting for Ri prime match (%x)\n",
+			      I915_READ(PORT_HDCP_STATUS(port)));
+		return -ETIMEDOUT;
+	}
+
+	/* Wait for encryption confirmation */
+	if (intel_wait_for_register(&dev_priv->uncore, PORT_HDCP_STATUS(port),
+				    HDCP_STATUS_ENC, HDCP_STATUS_ENC,
+				    ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) {
+		DRM_ERROR("Timed out waiting for encryption\n");
+		return -ETIMEDOUT;
+	}
+
+	/*
+	 * XXX: If we have MST-connected devices, we need to enable encryption
+	 * on those as well.
+	 */
+
+	if (repeater_present)
+		return intel_hdcp_auth_downstream(connector);
+
+	DRM_DEBUG_KMS("HDCP is enabled (no repeater present)\n");
+	return 0;
+}
+
+static int _intel_hdcp_disable(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	enum port port = intel_dig_port->base.port;
+	int ret;
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP is being disabled...\n",
+		      connector->base.name, connector->base.base.id);
+
+	hdcp->hdcp_encrypted = false;
+	I915_WRITE(PORT_HDCP_CONF(port), 0);
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    PORT_HDCP_STATUS(port), ~0, 0,
+				    ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) {
+		DRM_ERROR("Failed to disable HDCP, timeout clearing status\n");
+		return -ETIMEDOUT;
+	}
+
+	ret = hdcp->shim->toggle_signalling(intel_dig_port, false);
+	if (ret) {
+		DRM_ERROR("Failed to disable HDCP signalling\n");
+		return ret;
+	}
+
+	DRM_DEBUG_KMS("HDCP is disabled\n");
+	return 0;
+}
+
+static int _intel_hdcp_enable(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
+	int i, ret, tries = 3;
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP is being enabled...\n",
+		      connector->base.name, connector->base.base.id);
+
+	if (!hdcp_key_loadable(dev_priv)) {
+		DRM_ERROR("HDCP key Load is not possible\n");
+		return -ENXIO;
+	}
+
+	for (i = 0; i < KEY_LOAD_TRIES; i++) {
+		ret = intel_hdcp_load_keys(dev_priv);
+		if (!ret)
+			break;
+		intel_hdcp_clear_keys(dev_priv);
+	}
+	if (ret) {
+		DRM_ERROR("Could not load HDCP keys, (%d)\n", ret);
+		return ret;
+	}
+
+	/* Incase of authentication failures, HDCP spec expects reauth. */
+	for (i = 0; i < tries; i++) {
+		ret = intel_hdcp_auth(connector);
+		if (!ret) {
+			hdcp->hdcp_encrypted = true;
+			return 0;
+		}
+
+		DRM_DEBUG_KMS("HDCP Auth failure (%d)\n", ret);
+
+		/* Ensuring HDCP encryption and signalling are stopped. */
+		_intel_hdcp_disable(connector);
+	}
+
+	DRM_DEBUG_KMS("HDCP authentication failed (%d tries/%d)\n", tries, ret);
+	return ret;
+}
+
+static inline
+struct intel_connector *intel_hdcp_to_connector(struct intel_hdcp *hdcp)
+{
+	return container_of(hdcp, struct intel_connector, hdcp);
+}
+
+/* Implements Part 3 of the HDCP authorization procedure */
+static int intel_hdcp_check_link(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	enum port port = intel_dig_port->base.port;
+	int ret = 0;
+
+	mutex_lock(&hdcp->mutex);
+
+	/* Check_link valid only when HDCP1.4 is enabled */
+	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_ENABLED ||
+	    !hdcp->hdcp_encrypted) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (WARN_ON(!intel_hdcp_in_use(connector))) {
+		DRM_ERROR("%s:%d HDCP link stopped encryption,%x\n",
+			  connector->base.name, connector->base.base.id,
+			  I915_READ(PORT_HDCP_STATUS(port)));
+		ret = -ENXIO;
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+	if (hdcp->shim->check_link(intel_dig_port)) {
+		if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+			schedule_work(&hdcp->prop_work);
+		}
+		goto out;
+	}
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP link failed, retrying authentication\n",
+		      connector->base.name, connector->base.base.id);
+
+	ret = _intel_hdcp_disable(connector);
+	if (ret) {
+		DRM_ERROR("Failed to disable hdcp (%d)\n", ret);
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+	ret = _intel_hdcp_enable(connector);
+	if (ret) {
+		DRM_ERROR("Failed to enable hdcp (%d)\n", ret);
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+out:
+	mutex_unlock(&hdcp->mutex);
+	return ret;
+}
+
+static void intel_hdcp_prop_work(struct work_struct *work)
+{
+	struct intel_hdcp *hdcp = container_of(work, struct intel_hdcp,
+					       prop_work);
+	struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
+	struct drm_device *dev = connector->base.dev;
+	struct drm_connector_state *state;
+
+	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+	mutex_lock(&hdcp->mutex);
+
+	/*
+	 * This worker is only used to flip between ENABLED/DESIRED. Either of
+	 * those to UNDESIRED is handled by core. If value == UNDESIRED,
+	 * we're running just after hdcp has been disabled, so just exit
+	 */
+	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+		state = connector->base.state;
+		state->content_protection = hdcp->value;
+	}
+
+	mutex_unlock(&hdcp->mutex);
+	drm_modeset_unlock(&dev->mode_config.connection_mutex);
+}
+
+bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port)
+{
+	/* PORT E doesn't have HDCP, and PORT F is disabled */
+	return INTEL_GEN(dev_priv) >= 9 && port < PORT_E;
+}
+
+static int
+hdcp2_prepare_ake_init(struct intel_connector *connector,
+		       struct hdcp2_ake_init *ake_data)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->initiate_hdcp2_session(comp->mei_dev, data, ake_data);
+	if (ret)
+		DRM_DEBUG_KMS("Prepare_ake_init failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int
+hdcp2_verify_rx_cert_prepare_km(struct intel_connector *connector,
+				struct hdcp2_ake_send_cert *rx_cert,
+				bool *paired,
+				struct hdcp2_ake_no_stored_km *ek_pub_km,
+				size_t *msg_sz)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_receiver_cert_prepare_km(comp->mei_dev, data,
+							 rx_cert, paired,
+							 ek_pub_km, msg_sz);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify rx_cert failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int hdcp2_verify_hprime(struct intel_connector *connector,
+			       struct hdcp2_ake_send_hprime *rx_hprime)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_hprime(comp->mei_dev, data, rx_hprime);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify hprime failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int
+hdcp2_store_pairing_info(struct intel_connector *connector,
+			 struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->store_pairing_info(comp->mei_dev, data, pairing_info);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Store pairing info failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int
+hdcp2_prepare_lc_init(struct intel_connector *connector,
+		      struct hdcp2_lc_init *lc_init)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->initiate_locality_check(comp->mei_dev, data, lc_init);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Prepare lc_init failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int
+hdcp2_verify_lprime(struct intel_connector *connector,
+		    struct hdcp2_lc_send_lprime *rx_lprime)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_lprime(comp->mei_dev, data, rx_lprime);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify L_Prime failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int hdcp2_prepare_skey(struct intel_connector *connector,
+			      struct hdcp2_ske_send_eks *ske_data)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->get_session_key(comp->mei_dev, data, ske_data);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Get session key failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int
+hdcp2_verify_rep_topology_prepare_ack(struct intel_connector *connector,
+				      struct hdcp2_rep_send_receiverid_list
+								*rep_topology,
+				      struct hdcp2_rep_send_ack *rep_send_ack)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->repeater_check_flow_prepare_ack(comp->mei_dev, data,
+							 rep_topology,
+							 rep_send_ack);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify rep topology failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int
+hdcp2_verify_mprime(struct intel_connector *connector,
+		    struct hdcp2_rep_stream_ready *stream_ready)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->verify_mprime(comp->mei_dev, data, stream_ready);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Verify mprime failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int hdcp2_authenticate_port(struct intel_connector *connector)
+{
+	struct hdcp_port_data *data = &connector->hdcp.port_data;
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->enable_hdcp_authentication(comp->mei_dev, data);
+	if (ret < 0)
+		DRM_DEBUG_KMS("Enable hdcp auth failed. %d\n", ret);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int hdcp2_close_mei_session(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct i915_hdcp_comp_master *comp;
+	int ret;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	comp = dev_priv->hdcp_master;
+
+	if (!comp || !comp->ops) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return -EINVAL;
+	}
+
+	ret = comp->ops->close_hdcp_session(comp->mei_dev,
+					     &connector->hdcp.port_data);
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return ret;
+}
+
+static int hdcp2_deauthenticate_port(struct intel_connector *connector)
+{
+	return hdcp2_close_mei_session(connector);
+}
+
+/* Authentication flow starts from here */
+static int hdcp2_authentication_key_exchange(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct drm_device *dev = connector->base.dev;
+	union {
+		struct hdcp2_ake_init ake_init;
+		struct hdcp2_ake_send_cert send_cert;
+		struct hdcp2_ake_no_stored_km no_stored_km;
+		struct hdcp2_ake_send_hprime send_hprime;
+		struct hdcp2_ake_send_pairing_info pairing_info;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	size_t size;
+	int ret;
+
+	/* Init for seq_num */
+	hdcp->seq_num_v = 0;
+	hdcp->seq_num_m = 0;
+
+	ret = hdcp2_prepare_ake_init(connector, &msgs.ake_init);
+	if (ret < 0)
+		return ret;
+
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.ake_init,
+				  sizeof(msgs.ake_init));
+	if (ret < 0)
+		return ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_AKE_SEND_CERT,
+				 &msgs.send_cert, sizeof(msgs.send_cert));
+	if (ret < 0)
+		return ret;
+
+	if (msgs.send_cert.rx_caps[0] != HDCP_2_2_RX_CAPS_VERSION_VAL)
+		return -EINVAL;
+
+	hdcp->is_repeater = HDCP_2_2_RX_REPEATER(msgs.send_cert.rx_caps[2]);
+
+	if (drm_hdcp_check_ksvs_revoked(dev, msgs.send_cert.cert_rx.receiver_id,
+					1)) {
+		DRM_ERROR("Receiver ID is revoked\n");
+		return -EPERM;
+	}
+
+	/*
+	 * Here msgs.no_stored_km will hold msgs corresponding to the km
+	 * stored also.
+	 */
+	ret = hdcp2_verify_rx_cert_prepare_km(connector, &msgs.send_cert,
+					      &hdcp->is_paired,
+					      &msgs.no_stored_km, &size);
+	if (ret < 0)
+		return ret;
+
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.no_stored_km, size);
+	if (ret < 0)
+		return ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_AKE_SEND_HPRIME,
+				 &msgs.send_hprime, sizeof(msgs.send_hprime));
+	if (ret < 0)
+		return ret;
+
+	ret = hdcp2_verify_hprime(connector, &msgs.send_hprime);
+	if (ret < 0)
+		return ret;
+
+	if (!hdcp->is_paired) {
+		/* Pairing is required */
+		ret = shim->read_2_2_msg(intel_dig_port,
+					 HDCP_2_2_AKE_SEND_PAIRING_INFO,
+					 &msgs.pairing_info,
+					 sizeof(msgs.pairing_info));
+		if (ret < 0)
+			return ret;
+
+		ret = hdcp2_store_pairing_info(connector, &msgs.pairing_info);
+		if (ret < 0)
+			return ret;
+		hdcp->is_paired = true;
+	}
+
+	return 0;
+}
+
+static int hdcp2_locality_check(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	union {
+		struct hdcp2_lc_init lc_init;
+		struct hdcp2_lc_send_lprime send_lprime;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	int tries = HDCP2_LC_RETRY_CNT, ret, i;
+
+	for (i = 0; i < tries; i++) {
+		ret = hdcp2_prepare_lc_init(connector, &msgs.lc_init);
+		if (ret < 0)
+			continue;
+
+		ret = shim->write_2_2_msg(intel_dig_port, &msgs.lc_init,
+				      sizeof(msgs.lc_init));
+		if (ret < 0)
+			continue;
+
+		ret = shim->read_2_2_msg(intel_dig_port,
+					 HDCP_2_2_LC_SEND_LPRIME,
+					 &msgs.send_lprime,
+					 sizeof(msgs.send_lprime));
+		if (ret < 0)
+			continue;
+
+		ret = hdcp2_verify_lprime(connector, &msgs.send_lprime);
+		if (!ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int hdcp2_session_key_exchange(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct hdcp2_ske_send_eks send_eks;
+	int ret;
+
+	ret = hdcp2_prepare_skey(connector, &send_eks);
+	if (ret < 0)
+		return ret;
+
+	ret = hdcp->shim->write_2_2_msg(intel_dig_port, &send_eks,
+					sizeof(send_eks));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static
+int hdcp2_propagate_stream_management_info(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	union {
+		struct hdcp2_rep_stream_manage stream_manage;
+		struct hdcp2_rep_stream_ready stream_ready;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	int ret;
+
+	/* Prepare RepeaterAuth_Stream_Manage msg */
+	msgs.stream_manage.msg_id = HDCP_2_2_REP_STREAM_MANAGE;
+	drm_hdcp_cpu_to_be24(msgs.stream_manage.seq_num_m, hdcp->seq_num_m);
+
+	/* K no of streams is fixed as 1. Stored as big-endian. */
+	msgs.stream_manage.k = cpu_to_be16(1);
+
+	/* For HDMI this is forced to be 0x0. For DP SST also this is 0x0. */
+	msgs.stream_manage.streams[0].stream_id = 0;
+	msgs.stream_manage.streams[0].stream_type = hdcp->content_type;
+
+	/* Send it to Repeater */
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.stream_manage,
+				  sizeof(msgs.stream_manage));
+	if (ret < 0)
+		return ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_REP_STREAM_READY,
+				 &msgs.stream_ready, sizeof(msgs.stream_ready));
+	if (ret < 0)
+		return ret;
+
+	hdcp->port_data.seq_num_m = hdcp->seq_num_m;
+	hdcp->port_data.streams[0].stream_type = hdcp->content_type;
+
+	ret = hdcp2_verify_mprime(connector, &msgs.stream_ready);
+	if (ret < 0)
+		return ret;
+
+	hdcp->seq_num_m++;
+
+	if (hdcp->seq_num_m > HDCP_2_2_SEQ_NUM_MAX) {
+		DRM_DEBUG_KMS("seq_num_m roll over.\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static
+int hdcp2_authenticate_repeater_topology(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct drm_device *dev = connector->base.dev;
+	union {
+		struct hdcp2_rep_send_receiverid_list recvid_list;
+		struct hdcp2_rep_send_ack rep_ack;
+	} msgs;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	u32 seq_num_v, device_cnt;
+	u8 *rx_info;
+	int ret;
+
+	ret = shim->read_2_2_msg(intel_dig_port, HDCP_2_2_REP_SEND_RECVID_LIST,
+				 &msgs.recvid_list, sizeof(msgs.recvid_list));
+	if (ret < 0)
+		return ret;
+
+	rx_info = msgs.recvid_list.rx_info;
+
+	if (HDCP_2_2_MAX_CASCADE_EXCEEDED(rx_info[1]) ||
+	    HDCP_2_2_MAX_DEVS_EXCEEDED(rx_info[1])) {
+		DRM_DEBUG_KMS("Topology Max Size Exceeded\n");
+		return -EINVAL;
+	}
+
+	/* Converting and Storing the seq_num_v to local variable as DWORD */
+	seq_num_v =
+		drm_hdcp_be24_to_cpu((const u8 *)msgs.recvid_list.seq_num_v);
+
+	if (seq_num_v < hdcp->seq_num_v) {
+		/* Roll over of the seq_num_v from repeater. Reauthenticate. */
+		DRM_DEBUG_KMS("Seq_num_v roll over.\n");
+		return -EINVAL;
+	}
+
+	device_cnt = (HDCP_2_2_DEV_COUNT_HI(rx_info[0]) << 4 |
+		      HDCP_2_2_DEV_COUNT_LO(rx_info[1]));
+	if (drm_hdcp_check_ksvs_revoked(dev, msgs.recvid_list.receiver_ids,
+					device_cnt)) {
+		DRM_ERROR("Revoked receiver ID(s) is in list\n");
+		return -EPERM;
+	}
+
+	ret = hdcp2_verify_rep_topology_prepare_ack(connector,
+						    &msgs.recvid_list,
+						    &msgs.rep_ack);
+	if (ret < 0)
+		return ret;
+
+	hdcp->seq_num_v = seq_num_v;
+	ret = shim->write_2_2_msg(intel_dig_port, &msgs.rep_ack,
+				  sizeof(msgs.rep_ack));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int hdcp2_authenticate_repeater(struct intel_connector *connector)
+{
+	int ret;
+
+	ret = hdcp2_authenticate_repeater_topology(connector);
+	if (ret < 0)
+		return ret;
+
+	return hdcp2_propagate_stream_management_info(connector);
+}
+
+static int hdcp2_authenticate_sink(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	const struct intel_hdcp_shim *shim = hdcp->shim;
+	int ret;
+
+	ret = hdcp2_authentication_key_exchange(connector);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("AKE Failed. Err : %d\n", ret);
+		return ret;
+	}
+
+	ret = hdcp2_locality_check(connector);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("Locality Check failed. Err : %d\n", ret);
+		return ret;
+	}
+
+	ret = hdcp2_session_key_exchange(connector);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("SKE Failed. Err : %d\n", ret);
+		return ret;
+	}
+
+	if (shim->config_stream_type) {
+		ret = shim->config_stream_type(intel_dig_port,
+					       hdcp->is_repeater,
+					       hdcp->content_type);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (hdcp->is_repeater) {
+		ret = hdcp2_authenticate_repeater(connector);
+		if (ret < 0) {
+			DRM_DEBUG_KMS("Repeater Auth Failed. Err: %d\n", ret);
+			return ret;
+		}
+	}
+
+	hdcp->port_data.streams[0].stream_type = hdcp->content_type;
+	ret = hdcp2_authenticate_port(connector);
+	if (ret < 0)
+		return ret;
+
+	return ret;
+}
+
+static int hdcp2_enable_encryption(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	enum port port = connector->encoder->port;
+	int ret;
+
+	WARN_ON(I915_READ(HDCP2_STATUS_DDI(port)) & LINK_ENCRYPTION_STATUS);
+
+	if (hdcp->shim->toggle_signalling) {
+		ret = hdcp->shim->toggle_signalling(intel_dig_port, true);
+		if (ret) {
+			DRM_ERROR("Failed to enable HDCP signalling. %d\n",
+				  ret);
+			return ret;
+		}
+	}
+
+	if (I915_READ(HDCP2_STATUS_DDI(port)) & LINK_AUTH_STATUS) {
+		/* Link is Authenticated. Now set for Encryption */
+		I915_WRITE(HDCP2_CTL_DDI(port),
+			   I915_READ(HDCP2_CTL_DDI(port)) |
+			   CTL_LINK_ENCRYPTION_REQ);
+	}
+
+	ret = intel_wait_for_register(&dev_priv->uncore, HDCP2_STATUS_DDI(port),
+				      LINK_ENCRYPTION_STATUS,
+				      LINK_ENCRYPTION_STATUS,
+				      ENCRYPT_STATUS_CHANGE_TIMEOUT_MS);
+
+	return ret;
+}
+
+static int hdcp2_disable_encryption(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	enum port port = connector->encoder->port;
+	int ret;
+
+	WARN_ON(!(I915_READ(HDCP2_STATUS_DDI(port)) & LINK_ENCRYPTION_STATUS));
+
+	I915_WRITE(HDCP2_CTL_DDI(port),
+		   I915_READ(HDCP2_CTL_DDI(port)) & ~CTL_LINK_ENCRYPTION_REQ);
+
+	ret = intel_wait_for_register(&dev_priv->uncore, HDCP2_STATUS_DDI(port),
+				      LINK_ENCRYPTION_STATUS, 0x0,
+				      ENCRYPT_STATUS_CHANGE_TIMEOUT_MS);
+	if (ret == -ETIMEDOUT)
+		DRM_DEBUG_KMS("Disable Encryption Timedout");
+
+	if (hdcp->shim->toggle_signalling) {
+		ret = hdcp->shim->toggle_signalling(intel_dig_port, false);
+		if (ret) {
+			DRM_ERROR("Failed to disable HDCP signalling. %d\n",
+				  ret);
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+static int hdcp2_authenticate_and_encrypt(struct intel_connector *connector)
+{
+	int ret, i, tries = 3;
+
+	for (i = 0; i < tries; i++) {
+		ret = hdcp2_authenticate_sink(connector);
+		if (!ret)
+			break;
+
+		/* Clearing the mei hdcp session */
+		DRM_DEBUG_KMS("HDCP2.2 Auth %d of %d Failed.(%d)\n",
+			      i + 1, tries, ret);
+		if (hdcp2_deauthenticate_port(connector) < 0)
+			DRM_DEBUG_KMS("Port deauth failed.\n");
+	}
+
+	if (i != tries) {
+		/*
+		 * Ensuring the required 200mSec min time interval between
+		 * Session Key Exchange and encryption.
+		 */
+		msleep(HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN);
+		ret = hdcp2_enable_encryption(connector);
+		if (ret < 0) {
+			DRM_DEBUG_KMS("Encryption Enable Failed.(%d)\n", ret);
+			if (hdcp2_deauthenticate_port(connector) < 0)
+				DRM_DEBUG_KMS("Port deauth failed.\n");
+		}
+	}
+
+	return ret;
+}
+
+static int _intel_hdcp2_enable(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret;
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being enabled. Type: %d\n",
+		      connector->base.name, connector->base.base.id,
+		      hdcp->content_type);
+
+	ret = hdcp2_authenticate_and_encrypt(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("HDCP2 Type%d  Enabling Failed. (%d)\n",
+			      hdcp->content_type, ret);
+		return ret;
+	}
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is enabled. Type %d\n",
+		      connector->base.name, connector->base.base.id,
+		      hdcp->content_type);
+
+	hdcp->hdcp2_encrypted = true;
+	return 0;
+}
+
+static int _intel_hdcp2_disable(struct intel_connector *connector)
+{
+	int ret;
+
+	DRM_DEBUG_KMS("[%s:%d] HDCP2.2 is being Disabled\n",
+		      connector->base.name, connector->base.base.id);
+
+	ret = hdcp2_disable_encryption(connector);
+
+	if (hdcp2_deauthenticate_port(connector) < 0)
+		DRM_DEBUG_KMS("Port deauth failed.\n");
+
+	connector->hdcp.hdcp2_encrypted = false;
+
+	return ret;
+}
+
+/* Implements the Link Integrity Check for HDCP2.2 */
+static int intel_hdcp2_check_link(struct intel_connector *connector)
+{
+	struct intel_digital_port *intel_dig_port = conn_to_dig_port(connector);
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	enum port port = connector->encoder->port;
+	int ret = 0;
+
+	mutex_lock(&hdcp->mutex);
+
+	/* hdcp2_check_link is expected only when HDCP2.2 is Enabled */
+	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_ENABLED ||
+	    !hdcp->hdcp2_encrypted) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (WARN_ON(!intel_hdcp2_in_use(connector))) {
+		DRM_ERROR("HDCP2.2 link stopped the encryption, %x\n",
+			  I915_READ(HDCP2_STATUS_DDI(port)));
+		ret = -ENXIO;
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+	ret = hdcp->shim->check_2_2_link(intel_dig_port);
+	if (ret == HDCP_LINK_PROTECTED) {
+		if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+			schedule_work(&hdcp->prop_work);
+		}
+		goto out;
+	}
+
+	if (ret == HDCP_TOPOLOGY_CHANGE) {
+		if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+			goto out;
+
+		DRM_DEBUG_KMS("HDCP2.2 Downstream topology change\n");
+		ret = hdcp2_authenticate_repeater_topology(connector);
+		if (!ret) {
+			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+			schedule_work(&hdcp->prop_work);
+			goto out;
+		}
+		DRM_DEBUG_KMS("[%s:%d] Repeater topology auth failed.(%d)\n",
+			      connector->base.name, connector->base.base.id,
+			      ret);
+	} else {
+		DRM_DEBUG_KMS("[%s:%d] HDCP2.2 link failed, retrying auth\n",
+			      connector->base.name, connector->base.base.id);
+	}
+
+	ret = _intel_hdcp2_disable(connector);
+	if (ret) {
+		DRM_ERROR("[%s:%d] Failed to disable hdcp2.2 (%d)\n",
+			  connector->base.name, connector->base.base.id, ret);
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+	ret = _intel_hdcp2_enable(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("[%s:%d] Failed to enable hdcp2.2 (%d)\n",
+			      connector->base.name, connector->base.base.id,
+			      ret);
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		schedule_work(&hdcp->prop_work);
+		goto out;
+	}
+
+out:
+	mutex_unlock(&hdcp->mutex);
+	return ret;
+}
+
+static void intel_hdcp_check_work(struct work_struct *work)
+{
+	struct intel_hdcp *hdcp = container_of(to_delayed_work(work),
+					       struct intel_hdcp,
+					       check_work);
+	struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
+
+	if (!intel_hdcp2_check_link(connector))
+		schedule_delayed_work(&hdcp->check_work,
+				      DRM_HDCP2_CHECK_PERIOD_MS);
+	else if (!intel_hdcp_check_link(connector))
+		schedule_delayed_work(&hdcp->check_work,
+				      DRM_HDCP_CHECK_PERIOD_MS);
+}
+
+static int i915_hdcp_component_bind(struct device *i915_kdev,
+				    struct device *mei_kdev, void *data)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+
+	DRM_DEBUG("I915 HDCP comp bind\n");
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	dev_priv->hdcp_master = (struct i915_hdcp_comp_master *)data;
+	dev_priv->hdcp_master->mei_dev = mei_kdev;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	return 0;
+}
+
+static void i915_hdcp_component_unbind(struct device *i915_kdev,
+				       struct device *mei_kdev, void *data)
+{
+	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+
+	DRM_DEBUG("I915 HDCP comp unbind\n");
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	dev_priv->hdcp_master = NULL;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+}
+
+static const struct component_ops i915_hdcp_component_ops = {
+	.bind   = i915_hdcp_component_bind,
+	.unbind = i915_hdcp_component_unbind,
+};
+
+static inline int initialize_hdcp_port_data(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	struct hdcp_port_data *data = &hdcp->port_data;
+
+	data->port = connector->encoder->port;
+	data->port_type = (u8)HDCP_PORT_TYPE_INTEGRATED;
+	data->protocol = (u8)hdcp->shim->protocol;
+
+	data->k = 1;
+	if (!data->streams)
+		data->streams = kcalloc(data->k,
+					sizeof(struct hdcp2_streamid_type),
+					GFP_KERNEL);
+	if (!data->streams) {
+		DRM_ERROR("Out of Memory\n");
+		return -ENOMEM;
+	}
+
+	data->streams[0].stream_id = 0;
+	data->streams[0].stream_type = hdcp->content_type;
+
+	return 0;
+}
+
+static bool is_hdcp2_supported(struct drm_i915_private *dev_priv)
+{
+	if (!IS_ENABLED(CONFIG_INTEL_MEI_HDCP))
+		return false;
+
+	return (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv) ||
+		IS_KABYLAKE(dev_priv));
+}
+
+void intel_hdcp_component_init(struct drm_i915_private *dev_priv)
+{
+	int ret;
+
+	if (!is_hdcp2_supported(dev_priv))
+		return;
+
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	WARN_ON(dev_priv->hdcp_comp_added);
+
+	dev_priv->hdcp_comp_added = true;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+	ret = component_add_typed(dev_priv->drm.dev, &i915_hdcp_component_ops,
+				  I915_COMPONENT_HDCP);
+	if (ret < 0) {
+		DRM_DEBUG_KMS("Failed at component add(%d)\n", ret);
+		mutex_lock(&dev_priv->hdcp_comp_mutex);
+		dev_priv->hdcp_comp_added = false;
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return;
+	}
+}
+
+static void intel_hdcp2_init(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret;
+
+	ret = initialize_hdcp_port_data(connector);
+	if (ret) {
+		DRM_DEBUG_KMS("Mei hdcp data init failed\n");
+		return;
+	}
+
+	hdcp->hdcp2_supported = true;
+}
+
+int intel_hdcp_init(struct intel_connector *connector,
+		    const struct intel_hdcp_shim *shim)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret;
+
+	if (!shim)
+		return -EINVAL;
+
+	ret = drm_connector_attach_content_protection_property(&connector->base);
+	if (ret)
+		return ret;
+
+	hdcp->shim = shim;
+	mutex_init(&hdcp->mutex);
+	INIT_DELAYED_WORK(&hdcp->check_work, intel_hdcp_check_work);
+	INIT_WORK(&hdcp->prop_work, intel_hdcp_prop_work);
+
+	if (is_hdcp2_supported(dev_priv))
+		intel_hdcp2_init(connector);
+	init_waitqueue_head(&hdcp->cp_irq_queue);
+
+	return 0;
+}
+
+int intel_hdcp_enable(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	unsigned long check_link_interval = DRM_HDCP_CHECK_PERIOD_MS;
+	int ret = -EINVAL;
+
+	if (!hdcp->shim)
+		return -ENOENT;
+
+	mutex_lock(&hdcp->mutex);
+	WARN_ON(hdcp->value == DRM_MODE_CONTENT_PROTECTION_ENABLED);
+
+	/*
+	 * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
+	 * is capable of HDCP2.2, it is preferred to use HDCP2.2.
+	 */
+	if (intel_hdcp2_capable(connector)) {
+		ret = _intel_hdcp2_enable(connector);
+		if (!ret)
+			check_link_interval = DRM_HDCP2_CHECK_PERIOD_MS;
+	}
+
+	/* When HDCP2.2 fails, HDCP1.4 will be attempted */
+	if (ret && intel_hdcp_capable(connector)) {
+		ret = _intel_hdcp_enable(connector);
+	}
+
+	if (!ret) {
+		schedule_delayed_work(&hdcp->check_work, check_link_interval);
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+		schedule_work(&hdcp->prop_work);
+	}
+
+	mutex_unlock(&hdcp->mutex);
+	return ret;
+}
+
+int intel_hdcp_disable(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret = 0;
+
+	if (!hdcp->shim)
+		return -ENOENT;
+
+	mutex_lock(&hdcp->mutex);
+
+	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+		hdcp->value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+		if (hdcp->hdcp2_encrypted)
+			ret = _intel_hdcp2_disable(connector);
+		else if (hdcp->hdcp_encrypted)
+			ret = _intel_hdcp_disable(connector);
+	}
+
+	mutex_unlock(&hdcp->mutex);
+	cancel_delayed_work_sync(&hdcp->check_work);
+	return ret;
+}
+
+void intel_hdcp_component_fini(struct drm_i915_private *dev_priv)
+{
+	mutex_lock(&dev_priv->hdcp_comp_mutex);
+	if (!dev_priv->hdcp_comp_added) {
+		mutex_unlock(&dev_priv->hdcp_comp_mutex);
+		return;
+	}
+
+	dev_priv->hdcp_comp_added = false;
+	mutex_unlock(&dev_priv->hdcp_comp_mutex);
+
+	component_del(dev_priv->drm.dev, &i915_hdcp_component_ops);
+}
+
+void intel_hdcp_cleanup(struct intel_connector *connector)
+{
+	if (!connector->hdcp.shim)
+		return;
+
+	mutex_lock(&connector->hdcp.mutex);
+	kfree(connector->hdcp.port_data.streams);
+	mutex_unlock(&connector->hdcp.mutex);
+}
+
+void intel_hdcp_atomic_check(struct drm_connector *connector,
+			     struct drm_connector_state *old_state,
+			     struct drm_connector_state *new_state)
+{
+	u64 old_cp = old_state->content_protection;
+	u64 new_cp = new_state->content_protection;
+	struct drm_crtc_state *crtc_state;
+
+	if (!new_state->crtc) {
+		/*
+		 * If the connector is being disabled with CP enabled, mark it
+		 * desired so it's re-enabled when the connector is brought back
+		 */
+		if (old_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED)
+			new_state->content_protection =
+				DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		return;
+	}
+
+	/*
+	 * Nothing to do if the state didn't change, or HDCP was activated since
+	 * the last commit
+	 */
+	if (old_cp == new_cp ||
+	    (old_cp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
+	     new_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED))
+		return;
+
+	crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
+						   new_state->crtc);
+	crtc_state->mode_changed = true;
+}
+
+/* Handles the CP_IRQ raised from the DP HDCP sink */
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+
+	if (!hdcp->shim)
+		return;
+
+	atomic_inc(&connector->hdcp.cp_irq_count);
+	wake_up_all(&connector->hdcp.cp_irq_queue);
+
+	schedule_delayed_work(&hdcp->check_work, 0);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h b/drivers/gpu/drm/i915/display/intel_hdcp.h
new file mode 100644
index 000000000000..be8da85c866a
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_HDCP_H__
+#define __INTEL_HDCP_H__
+
+#include <linux/types.h>
+
+#include <drm/i915_drm.h>
+
+struct drm_connector;
+struct drm_connector_state;
+struct drm_i915_private;
+struct intel_connector;
+struct intel_hdcp_shim;
+
+void intel_hdcp_atomic_check(struct drm_connector *connector,
+			     struct drm_connector_state *old_state,
+			     struct drm_connector_state *new_state);
+int intel_hdcp_init(struct intel_connector *connector,
+		    const struct intel_hdcp_shim *hdcp_shim);
+int intel_hdcp_enable(struct intel_connector *connector);
+int intel_hdcp_disable(struct intel_connector *connector);
+bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
+bool intel_hdcp_capable(struct intel_connector *connector);
+bool intel_hdcp2_capable(struct intel_connector *connector);
+void intel_hdcp_component_init(struct drm_i915_private *dev_priv);
+void intel_hdcp_component_fini(struct drm_i915_private *dev_priv);
+void intel_hdcp_cleanup(struct intel_connector *connector);
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector);
+
+#endif /* __INTEL_HDCP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
new file mode 100644
index 000000000000..ea3de4acc850
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -0,0 +1,687 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+
+#include <drm/i915_drm.h>
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_hotplug.h"
+
+/**
+ * DOC: Hotplug
+ *
+ * Simply put, hotplug occurs when a display is connected to or disconnected
+ * from the system. However, there may be adapters and docking stations and
+ * Display Port short pulses and MST devices involved, complicating matters.
+ *
+ * Hotplug in i915 is handled in many different levels of abstraction.
+ *
+ * The platform dependent interrupt handling code in i915_irq.c enables,
+ * disables, and does preliminary handling of the interrupts. The interrupt
+ * handlers gather the hotplug detect (HPD) information from relevant registers
+ * into a platform independent mask of hotplug pins that have fired.
+ *
+ * The platform independent interrupt handler intel_hpd_irq_handler() in
+ * intel_hotplug.c does hotplug irq storm detection and mitigation, and passes
+ * further processing to appropriate bottom halves (Display Port specific and
+ * regular hotplug).
+ *
+ * The Display Port work function i915_digport_work_func() calls into
+ * intel_dp_hpd_pulse() via hooks, which handles DP short pulses and DP MST long
+ * pulses, with failures and non-MST long pulses triggering regular hotplug
+ * processing on the connector.
+ *
+ * The regular hotplug work function i915_hotplug_work_func() calls connector
+ * detect hooks, and, if connector status changes, triggers sending of hotplug
+ * uevent to userspace via drm_kms_helper_hotplug_event().
+ *
+ * Finally, the userspace is responsible for triggering a modeset upon receiving
+ * the hotplug uevent, disabling or enabling the crtc as needed.
+ *
+ * The hotplug interrupt storm detection and mitigation code keeps track of the
+ * number of interrupts per hotplug pin per a period of time, and if the number
+ * of interrupts exceeds a certain threshold, the interrupt is disabled for a
+ * while before being re-enabled. The intention is to mitigate issues raising
+ * from broken hardware triggering massive amounts of interrupts and grinding
+ * the system to a halt.
+ *
+ * Current implementation expects that hotplug interrupt storm will not be
+ * seen when display port sink is connected, hence on platforms whose DP
+ * callback is handled by i915_digport_work_func reenabling of hpd is not
+ * performed (it was never expected to be disabled in the first place ;) )
+ * this is specific to DP sinks handled by this routine and any other display
+ * such as HDMI or DVI enabled on the same port will have proper logic since
+ * it will use i915_hotplug_work_func where this logic is handled.
+ */
+
+/**
+ * intel_hpd_pin_default - return default pin associated with certain port.
+ * @dev_priv: private driver data pointer
+ * @port: the hpd port to get associated pin
+ *
+ * It is only valid and used by digital port encoder.
+ *
+ * Return pin that is associatade with @port and HDP_NONE if no pin is
+ * hard associated with that @port.
+ */
+enum hpd_pin intel_hpd_pin_default(struct drm_i915_private *dev_priv,
+				   enum port port)
+{
+	switch (port) {
+	case PORT_A:
+		return HPD_PORT_A;
+	case PORT_B:
+		return HPD_PORT_B;
+	case PORT_C:
+		return HPD_PORT_C;
+	case PORT_D:
+		return HPD_PORT_D;
+	case PORT_E:
+		return HPD_PORT_E;
+	case PORT_F:
+		if (IS_CNL_WITH_PORT_F(dev_priv))
+			return HPD_PORT_E;
+		return HPD_PORT_F;
+	default:
+		MISSING_CASE(port);
+		return HPD_NONE;
+	}
+}
+
+#define HPD_STORM_DETECT_PERIOD		1000
+#define HPD_STORM_REENABLE_DELAY	(2 * 60 * 1000)
+
+/**
+ * intel_hpd_irq_storm_detect - gather stats and detect HPD IRQ storm on a pin
+ * @dev_priv: private driver data pointer
+ * @pin: the pin to gather stats on
+ * @long_hpd: whether the HPD IRQ was long or short
+ *
+ * Gather stats about HPD IRQs from the specified @pin, and detect IRQ
+ * storms. Only the pin specific stats and state are changed, the caller is
+ * responsible for further action.
+ *
+ * The number of IRQs that are allowed within @HPD_STORM_DETECT_PERIOD is
+ * stored in @dev_priv->hotplug.hpd_storm_threshold which defaults to
+ * @HPD_STORM_DEFAULT_THRESHOLD. Long IRQs count as +10 to this threshold, and
+ * short IRQs count as +1. If this threshold is exceeded, it's considered an
+ * IRQ storm and the IRQ state is set to @HPD_MARK_DISABLED.
+ *
+ * By default, most systems will only count long IRQs towards
+ * &dev_priv->hotplug.hpd_storm_threshold. However, some older systems also
+ * suffer from short IRQ storms and must also track these. Because short IRQ
+ * storms are naturally caused by sideband interactions with DP MST devices,
+ * short IRQ detection is only enabled for systems without DP MST support.
+ * Systems which are new enough to support DP MST are far less likely to
+ * suffer from IRQ storms at all, so this is fine.
+ *
+ * The HPD threshold can be controlled through i915_hpd_storm_ctl in debugfs,
+ * and should only be adjusted for automated hotplug testing.
+ *
+ * Return true if an IRQ storm was detected on @pin.
+ */
+static bool intel_hpd_irq_storm_detect(struct drm_i915_private *dev_priv,
+				       enum hpd_pin pin, bool long_hpd)
+{
+	struct i915_hotplug *hpd = &dev_priv->hotplug;
+	unsigned long start = hpd->stats[pin].last_jiffies;
+	unsigned long end = start + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD);
+	const int increment = long_hpd ? 10 : 1;
+	const int threshold = hpd->hpd_storm_threshold;
+	bool storm = false;
+
+	if (!threshold ||
+	    (!long_hpd && !dev_priv->hotplug.hpd_short_storm_enabled))
+		return false;
+
+	if (!time_in_range(jiffies, start, end)) {
+		hpd->stats[pin].last_jiffies = jiffies;
+		hpd->stats[pin].count = 0;
+	}
+
+	hpd->stats[pin].count += increment;
+	if (hpd->stats[pin].count > threshold) {
+		hpd->stats[pin].state = HPD_MARK_DISABLED;
+		DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", pin);
+		storm = true;
+	} else {
+		DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", pin,
+			      hpd->stats[pin].count);
+	}
+
+	return storm;
+}
+
+static void
+intel_hpd_irq_storm_switch_to_polling(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct intel_connector *intel_connector;
+	struct intel_encoder *intel_encoder;
+	struct drm_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	enum hpd_pin pin;
+	bool hpd_disabled = false;
+
+	lockdep_assert_held(&dev_priv->irq_lock);
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		if (connector->polled != DRM_CONNECTOR_POLL_HPD)
+			continue;
+
+		intel_connector = to_intel_connector(connector);
+		intel_encoder = intel_connector->encoder;
+		if (!intel_encoder)
+			continue;
+
+		pin = intel_encoder->hpd_pin;
+		if (pin == HPD_NONE ||
+		    dev_priv->hotplug.stats[pin].state != HPD_MARK_DISABLED)
+			continue;
+
+		DRM_INFO("HPD interrupt storm detected on connector %s: "
+			 "switching from hotplug detection to polling\n",
+			 connector->name);
+
+		dev_priv->hotplug.stats[pin].state = HPD_DISABLED;
+		connector->polled = DRM_CONNECTOR_POLL_CONNECT
+			| DRM_CONNECTOR_POLL_DISCONNECT;
+		hpd_disabled = true;
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	/* Enable polling and queue hotplug re-enabling. */
+	if (hpd_disabled) {
+		drm_kms_helper_poll_enable(dev);
+		mod_delayed_work(system_wq, &dev_priv->hotplug.reenable_work,
+				 msecs_to_jiffies(HPD_STORM_REENABLE_DELAY));
+	}
+}
+
+static void intel_hpd_irq_storm_reenable_work(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, typeof(*dev_priv),
+			     hotplug.reenable_work.work);
+	struct drm_device *dev = &dev_priv->drm;
+	intel_wakeref_t wakeref;
+	enum hpd_pin pin;
+
+	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
+
+	spin_lock_irq(&dev_priv->irq_lock);
+	for_each_hpd_pin(pin) {
+		struct drm_connector *connector;
+		struct drm_connector_list_iter conn_iter;
+
+		if (dev_priv->hotplug.stats[pin].state != HPD_DISABLED)
+			continue;
+
+		dev_priv->hotplug.stats[pin].state = HPD_ENABLED;
+
+		drm_connector_list_iter_begin(dev, &conn_iter);
+		drm_for_each_connector_iter(connector, &conn_iter) {
+			struct intel_connector *intel_connector = to_intel_connector(connector);
+
+			/* Don't check MST ports, they don't have pins */
+			if (!intel_connector->mst_port &&
+			    intel_connector->encoder->hpd_pin == pin) {
+				if (connector->polled != intel_connector->polled)
+					DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
+							 connector->name);
+				connector->polled = intel_connector->polled;
+				if (!connector->polled)
+					connector->polled = DRM_CONNECTOR_POLL_HPD;
+			}
+		}
+		drm_connector_list_iter_end(&conn_iter);
+	}
+	if (dev_priv->display_irqs_enabled && dev_priv->display.hpd_irq_setup)
+		dev_priv->display.hpd_irq_setup(dev_priv);
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+}
+
+bool intel_encoder_hotplug(struct intel_encoder *encoder,
+			   struct intel_connector *connector)
+{
+	struct drm_device *dev = connector->base.dev;
+	enum drm_connector_status old_status;
+
+	WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
+	old_status = connector->base.status;
+
+	connector->base.status =
+		drm_helper_probe_detect(&connector->base, NULL, false);
+
+	if (old_status == connector->base.status)
+		return false;
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
+		      connector->base.base.id,
+		      connector->base.name,
+		      drm_get_connector_status_name(old_status),
+		      drm_get_connector_status_name(connector->base.status));
+
+	return true;
+}
+
+static bool intel_encoder_has_hpd_pulse(struct intel_encoder *encoder)
+{
+	return intel_encoder_is_dig_port(encoder) &&
+		enc_to_dig_port(&encoder->base)->hpd_pulse != NULL;
+}
+
+static void i915_digport_work_func(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, struct drm_i915_private, hotplug.dig_port_work);
+	u32 long_port_mask, short_port_mask;
+	struct intel_encoder *encoder;
+	u32 old_bits = 0;
+
+	spin_lock_irq(&dev_priv->irq_lock);
+	long_port_mask = dev_priv->hotplug.long_port_mask;
+	dev_priv->hotplug.long_port_mask = 0;
+	short_port_mask = dev_priv->hotplug.short_port_mask;
+	dev_priv->hotplug.short_port_mask = 0;
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		struct intel_digital_port *dig_port;
+		enum port port = encoder->port;
+		bool long_hpd, short_hpd;
+		enum irqreturn ret;
+
+		if (!intel_encoder_has_hpd_pulse(encoder))
+			continue;
+
+		long_hpd = long_port_mask & BIT(port);
+		short_hpd = short_port_mask & BIT(port);
+
+		if (!long_hpd && !short_hpd)
+			continue;
+
+		dig_port = enc_to_dig_port(&encoder->base);
+
+		ret = dig_port->hpd_pulse(dig_port, long_hpd);
+		if (ret == IRQ_NONE) {
+			/* fall back to old school hpd */
+			old_bits |= BIT(encoder->hpd_pin);
+		}
+	}
+
+	if (old_bits) {
+		spin_lock_irq(&dev_priv->irq_lock);
+		dev_priv->hotplug.event_bits |= old_bits;
+		spin_unlock_irq(&dev_priv->irq_lock);
+		schedule_work(&dev_priv->hotplug.hotplug_work);
+	}
+}
+
+/*
+ * Handle hotplug events outside the interrupt handler proper.
+ */
+static void i915_hotplug_work_func(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, struct drm_i915_private, hotplug.hotplug_work);
+	struct drm_device *dev = &dev_priv->drm;
+	struct intel_connector *intel_connector;
+	struct intel_encoder *intel_encoder;
+	struct drm_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	bool changed = false;
+	u32 hpd_event_bits;
+
+	mutex_lock(&dev->mode_config.mutex);
+	DRM_DEBUG_KMS("running encoder hotplug functions\n");
+
+	spin_lock_irq(&dev_priv->irq_lock);
+
+	hpd_event_bits = dev_priv->hotplug.event_bits;
+	dev_priv->hotplug.event_bits = 0;
+
+	/* Enable polling for connectors which had HPD IRQ storms */
+	intel_hpd_irq_storm_switch_to_polling(dev_priv);
+
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		intel_connector = to_intel_connector(connector);
+		if (!intel_connector->encoder)
+			continue;
+		intel_encoder = intel_connector->encoder;
+		if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
+			DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
+				      connector->name, intel_encoder->hpd_pin);
+
+			changed |= intel_encoder->hotplug(intel_encoder,
+							  intel_connector);
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+	mutex_unlock(&dev->mode_config.mutex);
+
+	if (changed)
+		drm_kms_helper_hotplug_event(dev);
+}
+
+
+/**
+ * intel_hpd_irq_handler - main hotplug irq handler
+ * @dev_priv: drm_i915_private
+ * @pin_mask: a mask of hpd pins that have triggered the irq
+ * @long_mask: a mask of hpd pins that may be long hpd pulses
+ *
+ * This is the main hotplug irq handler for all platforms. The platform specific
+ * irq handlers call the platform specific hotplug irq handlers, which read and
+ * decode the appropriate registers into bitmasks about hpd pins that have
+ * triggered (@pin_mask), and which of those pins may be long pulses
+ * (@long_mask). The @long_mask is ignored if the port corresponding to the pin
+ * is not a digital port.
+ *
+ * Here, we do hotplug irq storm detection and mitigation, and pass further
+ * processing to appropriate bottom halves.
+ */
+void intel_hpd_irq_handler(struct drm_i915_private *dev_priv,
+			   u32 pin_mask, u32 long_mask)
+{
+	struct intel_encoder *encoder;
+	bool storm_detected = false;
+	bool queue_dig = false, queue_hp = false;
+	u32 long_hpd_pulse_mask = 0;
+	u32 short_hpd_pulse_mask = 0;
+	enum hpd_pin pin;
+
+	if (!pin_mask)
+		return;
+
+	spin_lock(&dev_priv->irq_lock);
+
+	/*
+	 * Determine whether ->hpd_pulse() exists for each pin, and
+	 * whether we have a short or a long pulse. This is needed
+	 * as each pin may have up to two encoders (HDMI and DP) and
+	 * only the one of them (DP) will have ->hpd_pulse().
+	 */
+	for_each_intel_encoder(&dev_priv->drm, encoder) {
+		bool has_hpd_pulse = intel_encoder_has_hpd_pulse(encoder);
+		enum port port = encoder->port;
+		bool long_hpd;
+
+		pin = encoder->hpd_pin;
+		if (!(BIT(pin) & pin_mask))
+			continue;
+
+		if (!has_hpd_pulse)
+			continue;
+
+		long_hpd = long_mask & BIT(pin);
+
+		DRM_DEBUG_DRIVER("digital hpd port %c - %s\n", port_name(port),
+				 long_hpd ? "long" : "short");
+		queue_dig = true;
+
+		if (long_hpd) {
+			long_hpd_pulse_mask |= BIT(pin);
+			dev_priv->hotplug.long_port_mask |= BIT(port);
+		} else {
+			short_hpd_pulse_mask |= BIT(pin);
+			dev_priv->hotplug.short_port_mask |= BIT(port);
+		}
+	}
+
+	/* Now process each pin just once */
+	for_each_hpd_pin(pin) {
+		bool long_hpd;
+
+		if (!(BIT(pin) & pin_mask))
+			continue;
+
+		if (dev_priv->hotplug.stats[pin].state == HPD_DISABLED) {
+			/*
+			 * On GMCH platforms the interrupt mask bits only
+			 * prevent irq generation, not the setting of the
+			 * hotplug bits itself. So only WARN about unexpected
+			 * interrupts on saner platforms.
+			 */
+			WARN_ONCE(!HAS_GMCH(dev_priv),
+				  "Received HPD interrupt on pin %d although disabled\n", pin);
+			continue;
+		}
+
+		if (dev_priv->hotplug.stats[pin].state != HPD_ENABLED)
+			continue;
+
+		/*
+		 * Delegate to ->hpd_pulse() if one of the encoders for this
+		 * pin has it, otherwise let the hotplug_work deal with this
+		 * pin directly.
+		 */
+		if (((short_hpd_pulse_mask | long_hpd_pulse_mask) & BIT(pin))) {
+			long_hpd = long_hpd_pulse_mask & BIT(pin);
+		} else {
+			dev_priv->hotplug.event_bits |= BIT(pin);
+			long_hpd = true;
+			queue_hp = true;
+		}
+
+		if (intel_hpd_irq_storm_detect(dev_priv, pin, long_hpd)) {
+			dev_priv->hotplug.event_bits &= ~BIT(pin);
+			storm_detected = true;
+			queue_hp = true;
+		}
+	}
+
+	/*
+	 * Disable any IRQs that storms were detected on. Polling enablement
+	 * happens later in our hotplug work.
+	 */
+	if (storm_detected && dev_priv->display_irqs_enabled)
+		dev_priv->display.hpd_irq_setup(dev_priv);
+	spin_unlock(&dev_priv->irq_lock);
+
+	/*
+	 * Our hotplug handler can grab modeset locks (by calling down into the
+	 * fb helpers). Hence it must not be run on our own dev-priv->wq work
+	 * queue for otherwise the flush_work in the pageflip code will
+	 * deadlock.
+	 */
+	if (queue_dig)
+		queue_work(dev_priv->hotplug.dp_wq, &dev_priv->hotplug.dig_port_work);
+	if (queue_hp)
+		schedule_work(&dev_priv->hotplug.hotplug_work);
+}
+
+/**
+ * intel_hpd_init - initializes and enables hpd support
+ * @dev_priv: i915 device instance
+ *
+ * This function enables the hotplug support. It requires that interrupts have
+ * already been enabled with intel_irq_init_hw(). From this point on hotplug and
+ * poll request can run concurrently to other code, so locking rules must be
+ * obeyed.
+ *
+ * This is a separate step from interrupt enabling to simplify the locking rules
+ * in the driver load and resume code.
+ *
+ * Also see: intel_hpd_poll_init(), which enables connector polling
+ */
+void intel_hpd_init(struct drm_i915_private *dev_priv)
+{
+	int i;
+
+	for_each_hpd_pin(i) {
+		dev_priv->hotplug.stats[i].count = 0;
+		dev_priv->hotplug.stats[i].state = HPD_ENABLED;
+	}
+
+	WRITE_ONCE(dev_priv->hotplug.poll_enabled, false);
+	schedule_work(&dev_priv->hotplug.poll_init_work);
+
+	/*
+	 * Interrupt setup is already guaranteed to be single-threaded, this is
+	 * just to make the assert_spin_locked checks happy.
+	 */
+	if (dev_priv->display_irqs_enabled && dev_priv->display.hpd_irq_setup) {
+		spin_lock_irq(&dev_priv->irq_lock);
+		if (dev_priv->display_irqs_enabled)
+			dev_priv->display.hpd_irq_setup(dev_priv);
+		spin_unlock_irq(&dev_priv->irq_lock);
+	}
+}
+
+static void i915_hpd_poll_init_work(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, struct drm_i915_private,
+			     hotplug.poll_init_work);
+	struct drm_device *dev = &dev_priv->drm;
+	struct drm_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	bool enabled;
+
+	mutex_lock(&dev->mode_config.mutex);
+
+	enabled = READ_ONCE(dev_priv->hotplug.poll_enabled);
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		struct intel_connector *intel_connector =
+			to_intel_connector(connector);
+		connector->polled = intel_connector->polled;
+
+		/* MST has a dynamic intel_connector->encoder and it's reprobing
+		 * is all handled by the MST helpers. */
+		if (intel_connector->mst_port)
+			continue;
+
+		if (!connector->polled && I915_HAS_HOTPLUG(dev_priv) &&
+		    intel_connector->encoder->hpd_pin > HPD_NONE) {
+			connector->polled = enabled ?
+				DRM_CONNECTOR_POLL_CONNECT |
+				DRM_CONNECTOR_POLL_DISCONNECT :
+				DRM_CONNECTOR_POLL_HPD;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	if (enabled)
+		drm_kms_helper_poll_enable(dev);
+
+	mutex_unlock(&dev->mode_config.mutex);
+
+	/*
+	 * We might have missed any hotplugs that happened while we were
+	 * in the middle of disabling polling
+	 */
+	if (!enabled)
+		drm_helper_hpd_irq_event(dev);
+}
+
+/**
+ * intel_hpd_poll_init - enables/disables polling for connectors with hpd
+ * @dev_priv: i915 device instance
+ *
+ * This function enables polling for all connectors, regardless of whether or
+ * not they support hotplug detection. Under certain conditions HPD may not be
+ * functional. On most Intel GPUs, this happens when we enter runtime suspend.
+ * On Valleyview and Cherryview systems, this also happens when we shut off all
+ * of the powerwells.
+ *
+ * Since this function can get called in contexts where we're already holding
+ * dev->mode_config.mutex, we do the actual hotplug enabling in a seperate
+ * worker.
+ *
+ * Also see: intel_hpd_init(), which restores hpd handling.
+ */
+void intel_hpd_poll_init(struct drm_i915_private *dev_priv)
+{
+	WRITE_ONCE(dev_priv->hotplug.poll_enabled, true);
+
+	/*
+	 * We might already be holding dev->mode_config.mutex, so do this in a
+	 * seperate worker
+	 * As well, there's no issue if we race here since we always reschedule
+	 * this worker anyway
+	 */
+	schedule_work(&dev_priv->hotplug.poll_init_work);
+}
+
+void intel_hpd_init_work(struct drm_i915_private *dev_priv)
+{
+	INIT_WORK(&dev_priv->hotplug.hotplug_work, i915_hotplug_work_func);
+	INIT_WORK(&dev_priv->hotplug.dig_port_work, i915_digport_work_func);
+	INIT_WORK(&dev_priv->hotplug.poll_init_work, i915_hpd_poll_init_work);
+	INIT_DELAYED_WORK(&dev_priv->hotplug.reenable_work,
+			  intel_hpd_irq_storm_reenable_work);
+}
+
+void intel_hpd_cancel_work(struct drm_i915_private *dev_priv)
+{
+	spin_lock_irq(&dev_priv->irq_lock);
+
+	dev_priv->hotplug.long_port_mask = 0;
+	dev_priv->hotplug.short_port_mask = 0;
+	dev_priv->hotplug.event_bits = 0;
+
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	cancel_work_sync(&dev_priv->hotplug.dig_port_work);
+	cancel_work_sync(&dev_priv->hotplug.hotplug_work);
+	cancel_work_sync(&dev_priv->hotplug.poll_init_work);
+	cancel_delayed_work_sync(&dev_priv->hotplug.reenable_work);
+}
+
+bool intel_hpd_disable(struct drm_i915_private *dev_priv, enum hpd_pin pin)
+{
+	bool ret = false;
+
+	if (pin == HPD_NONE)
+		return false;
+
+	spin_lock_irq(&dev_priv->irq_lock);
+	if (dev_priv->hotplug.stats[pin].state == HPD_ENABLED) {
+		dev_priv->hotplug.stats[pin].state = HPD_DISABLED;
+		ret = true;
+	}
+	spin_unlock_irq(&dev_priv->irq_lock);
+
+	return ret;
+}
+
+void intel_hpd_enable(struct drm_i915_private *dev_priv, enum hpd_pin pin)
+{
+	if (pin == HPD_NONE)
+		return;
+
+	spin_lock_irq(&dev_priv->irq_lock);
+	dev_priv->hotplug.stats[pin].state = HPD_ENABLED;
+	spin_unlock_irq(&dev_priv->irq_lock);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.h b/drivers/gpu/drm/i915/display/intel_hotplug.h
new file mode 100644
index 000000000000..805f897dbb7a
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_HOTPLUG_H__
+#define __INTEL_HOTPLUG_H__
+
+#include <linux/types.h>
+
+#include <drm/i915_drm.h>
+
+struct drm_i915_private;
+struct intel_connector;
+struct intel_encoder;
+
+void intel_hpd_poll_init(struct drm_i915_private *dev_priv);
+bool intel_encoder_hotplug(struct intel_encoder *encoder,
+			   struct intel_connector *connector);
+void intel_hpd_irq_handler(struct drm_i915_private *dev_priv,
+			   u32 pin_mask, u32 long_mask);
+void intel_hpd_init(struct drm_i915_private *dev_priv);
+void intel_hpd_init_work(struct drm_i915_private *dev_priv);
+void intel_hpd_cancel_work(struct drm_i915_private *dev_priv);
+enum hpd_pin intel_hpd_pin_default(struct drm_i915_private *dev_priv,
+				   enum port port);
+bool intel_hpd_disable(struct drm_i915_private *dev_priv, enum hpd_pin pin);
+void intel_hpd_enable(struct drm_i915_private *dev_priv, enum hpd_pin pin);
+
+#endif /* __INTEL_HOTPLUG_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_lpe_audio.c b/drivers/gpu/drm/i915/display/intel_lpe_audio.c
new file mode 100644
index 000000000000..b19800b58442
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_lpe_audio.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
+ *    Jerome Anand <jerome.anand@intel.com>
+ *    based on VED patches
+ *
+ */
+
+/**
+ * DOC: LPE Audio integration for HDMI or DP playback
+ *
+ * Motivation:
+ * Atom platforms (e.g. valleyview and cherryTrail) integrates a DMA-based
+ * interface as an alternative to the traditional HDaudio path. While this
+ * mode is unrelated to the LPE aka SST audio engine, the documentation refers
+ * to this mode as LPE so we keep this notation for the sake of consistency.
+ *
+ * The interface is handled by a separate standalone driver maintained in the
+ * ALSA subsystem for simplicity. To minimize the interaction between the two
+ * subsystems, a bridge is setup between the hdmi-lpe-audio and i915:
+ * 1. Create a platform device to share MMIO/IRQ resources
+ * 2. Make the platform device child of i915 device for runtime PM.
+ * 3. Create IRQ chip to forward the LPE audio irqs.
+ * the hdmi-lpe-audio driver probes the lpe audio device and creates a new
+ * sound card
+ *
+ * Threats:
+ * Due to the restriction in Linux platform device model, user need manually
+ * uninstall the hdmi-lpe-audio driver before uninstalling i915 module,
+ * otherwise we might run into use-after-free issues after i915 removes the
+ * platform device: even though hdmi-lpe-audio driver is released, the modules
+ * is still in "installed" status.
+ *
+ * Implementation:
+ * The MMIO/REG platform resources are created according to the registers
+ * specification.
+ * When forwarding LPE audio irqs, the flow control handler selection depends
+ * on the platform, for example on valleyview handle_simple_irq is enough.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/irq.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/intel_lpe_audio.h>
+
+#include "i915_drv.h"
+#include "intel_lpe_audio.h"
+
+#define HAS_LPE_AUDIO(dev_priv) ((dev_priv)->lpe_audio.platdev != NULL)
+
+static struct platform_device *
+lpe_audio_platdev_create(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct platform_device_info pinfo = {};
+	struct resource *rsc;
+	struct platform_device *platdev;
+	struct intel_hdmi_lpe_audio_pdata *pdata;
+
+	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	rsc = kcalloc(2, sizeof(*rsc), GFP_KERNEL);
+	if (!rsc) {
+		kfree(pdata);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	rsc[0].start    = rsc[0].end = dev_priv->lpe_audio.irq;
+	rsc[0].flags    = IORESOURCE_IRQ;
+	rsc[0].name     = "hdmi-lpe-audio-irq";
+
+	rsc[1].start    = pci_resource_start(dev->pdev, 0) +
+		I915_HDMI_LPE_AUDIO_BASE;
+	rsc[1].end      = pci_resource_start(dev->pdev, 0) +
+		I915_HDMI_LPE_AUDIO_BASE + I915_HDMI_LPE_AUDIO_SIZE - 1;
+	rsc[1].flags    = IORESOURCE_MEM;
+	rsc[1].name     = "hdmi-lpe-audio-mmio";
+
+	pinfo.parent = dev->dev;
+	pinfo.name = "hdmi-lpe-audio";
+	pinfo.id = -1;
+	pinfo.res = rsc;
+	pinfo.num_res = 2;
+	pinfo.data = pdata;
+	pinfo.size_data = sizeof(*pdata);
+	pinfo.dma_mask = DMA_BIT_MASK(32);
+
+	pdata->num_pipes = INTEL_INFO(dev_priv)->num_pipes;
+	pdata->num_ports = IS_CHERRYVIEW(dev_priv) ? 3 : 2; /* B,C,D or B,C */
+	pdata->port[0].pipe = -1;
+	pdata->port[1].pipe = -1;
+	pdata->port[2].pipe = -1;
+	spin_lock_init(&pdata->lpe_audio_slock);
+
+	platdev = platform_device_register_full(&pinfo);
+	kfree(rsc);
+	kfree(pdata);
+
+	if (IS_ERR(platdev)) {
+		DRM_ERROR("Failed to allocate LPE audio platform device\n");
+		return platdev;
+	}
+
+	pm_runtime_no_callbacks(&platdev->dev);
+
+	return platdev;
+}
+
+static void lpe_audio_platdev_destroy(struct drm_i915_private *dev_priv)
+{
+	/* XXX Note that platform_device_register_full() allocates a dma_mask
+	 * and never frees it. We can't free it here as we cannot guarantee
+	 * this is the last reference (i.e. that the dma_mask will not be
+	 * used after our unregister). So ee choose to leak the sizeof(u64)
+	 * allocation here - it should be fixed in the platform_device rather
+	 * than us fiddle with its internals.
+	 */
+
+	platform_device_unregister(dev_priv->lpe_audio.platdev);
+}
+
+static void lpe_audio_irq_unmask(struct irq_data *d)
+{
+}
+
+static void lpe_audio_irq_mask(struct irq_data *d)
+{
+}
+
+static struct irq_chip lpe_audio_irqchip = {
+	.name = "hdmi_lpe_audio_irqchip",
+	.irq_mask = lpe_audio_irq_mask,
+	.irq_unmask = lpe_audio_irq_unmask,
+};
+
+static int lpe_audio_irq_init(struct drm_i915_private *dev_priv)
+{
+	int irq = dev_priv->lpe_audio.irq;
+
+	WARN_ON(!intel_irqs_enabled(dev_priv));
+	irq_set_chip_and_handler_name(irq,
+				&lpe_audio_irqchip,
+				handle_simple_irq,
+				"hdmi_lpe_audio_irq_handler");
+
+	return irq_set_chip_data(irq, dev_priv);
+}
+
+static bool lpe_audio_detect(struct drm_i915_private *dev_priv)
+{
+	int lpe_present = false;
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		static const struct pci_device_id atom_hdaudio_ids[] = {
+			/* Baytrail */
+			{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f04)},
+			/* Braswell */
+			{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2284)},
+			{}
+		};
+
+		if (!pci_dev_present(atom_hdaudio_ids)) {
+			DRM_INFO("HDaudio controller not detected, using LPE audio instead\n");
+			lpe_present = true;
+		}
+	}
+	return lpe_present;
+}
+
+static int lpe_audio_setup(struct drm_i915_private *dev_priv)
+{
+	int ret;
+
+	dev_priv->lpe_audio.irq = irq_alloc_desc(0);
+	if (dev_priv->lpe_audio.irq < 0) {
+		DRM_ERROR("Failed to allocate IRQ desc: %d\n",
+			dev_priv->lpe_audio.irq);
+		ret = dev_priv->lpe_audio.irq;
+		goto err;
+	}
+
+	DRM_DEBUG("irq = %d\n", dev_priv->lpe_audio.irq);
+
+	ret = lpe_audio_irq_init(dev_priv);
+
+	if (ret) {
+		DRM_ERROR("Failed to initialize irqchip for lpe audio: %d\n",
+			ret);
+		goto err_free_irq;
+	}
+
+	dev_priv->lpe_audio.platdev = lpe_audio_platdev_create(dev_priv);
+
+	if (IS_ERR(dev_priv->lpe_audio.platdev)) {
+		ret = PTR_ERR(dev_priv->lpe_audio.platdev);
+		DRM_ERROR("Failed to create lpe audio platform device: %d\n",
+			ret);
+		goto err_free_irq;
+	}
+
+	/* enable chicken bit; at least this is required for Dell Wyse 3040
+	 * with DP outputs (but only sometimes by some reason!)
+	 */
+	I915_WRITE(VLV_AUD_CHICKEN_BIT_REG, VLV_CHICKEN_BIT_DBG_ENABLE);
+
+	return 0;
+err_free_irq:
+	irq_free_desc(dev_priv->lpe_audio.irq);
+err:
+	dev_priv->lpe_audio.irq = -1;
+	dev_priv->lpe_audio.platdev = NULL;
+	return ret;
+}
+
+/**
+ * intel_lpe_audio_irq_handler() - forwards the LPE audio irq
+ * @dev_priv: the i915 drm device private data
+ *
+ * the LPE Audio irq is forwarded to the irq handler registered by LPE audio
+ * driver.
+ */
+void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv)
+{
+	int ret;
+
+	if (!HAS_LPE_AUDIO(dev_priv))
+		return;
+
+	ret = generic_handle_irq(dev_priv->lpe_audio.irq);
+	if (ret)
+		DRM_ERROR_RATELIMITED("error handling LPE audio irq: %d\n",
+				ret);
+}
+
+/**
+ * intel_lpe_audio_init() - detect and setup the bridge between HDMI LPE Audio
+ * driver and i915
+ * @dev_priv: the i915 drm device private data
+ *
+ * Return: 0 if successful. non-zero if detection or
+ * llocation/initialization fails
+ */
+int intel_lpe_audio_init(struct drm_i915_private *dev_priv)
+{
+	int ret = -ENODEV;
+
+	if (lpe_audio_detect(dev_priv)) {
+		ret = lpe_audio_setup(dev_priv);
+		if (ret < 0)
+			DRM_ERROR("failed to setup LPE Audio bridge\n");
+	}
+	return ret;
+}
+
+/**
+ * intel_lpe_audio_teardown() - destroy the bridge between HDMI LPE
+ * audio driver and i915
+ * @dev_priv: the i915 drm device private data
+ *
+ * release all the resources for LPE audio <-> i915 bridge.
+ */
+void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv)
+{
+	struct irq_desc *desc;
+
+	if (!HAS_LPE_AUDIO(dev_priv))
+		return;
+
+	desc = irq_to_desc(dev_priv->lpe_audio.irq);
+
+	lpe_audio_platdev_destroy(dev_priv);
+
+	irq_free_desc(dev_priv->lpe_audio.irq);
+
+	dev_priv->lpe_audio.irq = -1;
+	dev_priv->lpe_audio.platdev = NULL;
+}
+
+/**
+ * intel_lpe_audio_notify() - notify lpe audio event
+ * audio driver and i915
+ * @dev_priv: the i915 drm device private data
+ * @pipe: pipe
+ * @port: port
+ * @eld : ELD data
+ * @ls_clock: Link symbol clock in kHz
+ * @dp_output: Driving a DP output?
+ *
+ * Notify lpe audio driver of eld change.
+ */
+void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
+			    enum pipe pipe, enum port port,
+			    const void *eld, int ls_clock, bool dp_output)
+{
+	unsigned long irqflags;
+	struct intel_hdmi_lpe_audio_pdata *pdata;
+	struct intel_hdmi_lpe_audio_port_pdata *ppdata;
+	u32 audio_enable;
+
+	if (!HAS_LPE_AUDIO(dev_priv))
+		return;
+
+	pdata = dev_get_platdata(&dev_priv->lpe_audio.platdev->dev);
+	ppdata = &pdata->port[port - PORT_B];
+
+	spin_lock_irqsave(&pdata->lpe_audio_slock, irqflags);
+
+	audio_enable = I915_READ(VLV_AUD_PORT_EN_DBG(port));
+
+	if (eld != NULL) {
+		memcpy(ppdata->eld, eld, HDMI_MAX_ELD_BYTES);
+		ppdata->pipe = pipe;
+		ppdata->ls_clock = ls_clock;
+		ppdata->dp_output = dp_output;
+
+		/* Unmute the amp for both DP and HDMI */
+		I915_WRITE(VLV_AUD_PORT_EN_DBG(port),
+			   audio_enable & ~VLV_AMP_MUTE);
+	} else {
+		memset(ppdata->eld, 0, HDMI_MAX_ELD_BYTES);
+		ppdata->pipe = -1;
+		ppdata->ls_clock = 0;
+		ppdata->dp_output = false;
+
+		/* Mute the amp for both DP and HDMI */
+		I915_WRITE(VLV_AUD_PORT_EN_DBG(port),
+			   audio_enable | VLV_AMP_MUTE);
+	}
+
+	if (pdata->notify_audio_lpe)
+		pdata->notify_audio_lpe(dev_priv->lpe_audio.platdev, port - PORT_B);
+
+	spin_unlock_irqrestore(&pdata->lpe_audio_slock, irqflags);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_lpe_audio.h b/drivers/gpu/drm/i915/display/intel_lpe_audio.h
new file mode 100644
index 000000000000..f848c5038714
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_lpe_audio.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_LPE_AUDIO_H__
+#define __INTEL_LPE_AUDIO_H__
+
+#include <linux/types.h>
+
+enum pipe;
+enum port;
+struct drm_i915_private;
+
+int  intel_lpe_audio_init(struct drm_i915_private *dev_priv);
+void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv);
+void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv);
+void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
+			    enum pipe pipe, enum port port,
+			    const void *eld, int ls_clock, bool dp_output);
+
+#endif /* __INTEL_LPE_AUDIO_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c
new file mode 100644
index 000000000000..824881271351
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -0,0 +1,1176 @@
+/*
+ * Copyright 2008 Intel Corporation <hong.liu@intel.com>
+ * Copyright 2008 Red Hat <mjg@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/firmware.h>
+#include <acpi/video.h>
+
+#include <drm/i915_drm.h>
+
+#include "display/intel_panel.h"
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_opregion.h"
+
+#define OPREGION_HEADER_OFFSET 0
+#define OPREGION_ACPI_OFFSET   0x100
+#define   ACPI_CLID 0x01ac /* current lid state indicator */
+#define   ACPI_CDCK 0x01b0 /* current docking state indicator */
+#define OPREGION_SWSCI_OFFSET  0x200
+#define OPREGION_ASLE_OFFSET   0x300
+#define OPREGION_VBT_OFFSET    0x400
+#define OPREGION_ASLE_EXT_OFFSET	0x1C00
+
+#define OPREGION_SIGNATURE "IntelGraphicsMem"
+#define MBOX_ACPI      (1<<0)
+#define MBOX_SWSCI     (1<<1)
+#define MBOX_ASLE      (1<<2)
+#define MBOX_ASLE_EXT  (1<<4)
+
+struct opregion_header {
+	u8 signature[16];
+	u32 size;
+	struct {
+		u8 rsvd;
+		u8 revision;
+		u8 minor;
+		u8 major;
+	}  __packed over;
+	u8 bios_ver[32];
+	u8 vbios_ver[16];
+	u8 driver_ver[16];
+	u32 mboxes;
+	u32 driver_model;
+	u32 pcon;
+	u8 dver[32];
+	u8 rsvd[124];
+} __packed;
+
+/* OpRegion mailbox #1: public ACPI methods */
+struct opregion_acpi {
+	u32 drdy;       /* driver readiness */
+	u32 csts;       /* notification status */
+	u32 cevt;       /* current event */
+	u8 rsvd1[20];
+	u32 didl[8];    /* supported display devices ID list */
+	u32 cpdl[8];    /* currently presented display list */
+	u32 cadl[8];    /* currently active display list */
+	u32 nadl[8];    /* next active devices list */
+	u32 aslp;       /* ASL sleep time-out */
+	u32 tidx;       /* toggle table index */
+	u32 chpd;       /* current hotplug enable indicator */
+	u32 clid;       /* current lid state*/
+	u32 cdck;       /* current docking state */
+	u32 sxsw;       /* Sx state resume */
+	u32 evts;       /* ASL supported events */
+	u32 cnot;       /* current OS notification */
+	u32 nrdy;       /* driver status */
+	u32 did2[7];	/* extended supported display devices ID list */
+	u32 cpd2[7];	/* extended attached display devices list */
+	u8 rsvd2[4];
+} __packed;
+
+/* OpRegion mailbox #2: SWSCI */
+struct opregion_swsci {
+	u32 scic;       /* SWSCI command|status|data */
+	u32 parm;       /* command parameters */
+	u32 dslp;       /* driver sleep time-out */
+	u8 rsvd[244];
+} __packed;
+
+/* OpRegion mailbox #3: ASLE */
+struct opregion_asle {
+	u32 ardy;       /* driver readiness */
+	u32 aslc;       /* ASLE interrupt command */
+	u32 tche;       /* technology enabled indicator */
+	u32 alsi;       /* current ALS illuminance reading */
+	u32 bclp;       /* backlight brightness to set */
+	u32 pfit;       /* panel fitting state */
+	u32 cblv;       /* current brightness level */
+	u16 bclm[20];   /* backlight level duty cycle mapping table */
+	u32 cpfm;       /* current panel fitting mode */
+	u32 epfm;       /* enabled panel fitting modes */
+	u8 plut[74];    /* panel LUT and identifier */
+	u32 pfmb;       /* PWM freq and min brightness */
+	u32 cddv;       /* color correction default values */
+	u32 pcft;       /* power conservation features */
+	u32 srot;       /* supported rotation angles */
+	u32 iuer;       /* IUER events */
+	u64 fdss;
+	u32 fdsp;
+	u32 stat;
+	u64 rvda;	/* Physical (2.0) or relative from opregion (2.1+)
+			 * address of raw VBT data. */
+	u32 rvds;	/* Size of raw vbt data */
+	u8 rsvd[58];
+} __packed;
+
+/* OpRegion mailbox #5: ASLE ext */
+struct opregion_asle_ext {
+	u32 phed;	/* Panel Header */
+	u8 bddc[256];	/* Panel EDID */
+	u8 rsvd[764];
+} __packed;
+
+/* Driver readiness indicator */
+#define ASLE_ARDY_READY		(1 << 0)
+#define ASLE_ARDY_NOT_READY	(0 << 0)
+
+/* ASLE Interrupt Command (ASLC) bits */
+#define ASLC_SET_ALS_ILLUM		(1 << 0)
+#define ASLC_SET_BACKLIGHT		(1 << 1)
+#define ASLC_SET_PFIT			(1 << 2)
+#define ASLC_SET_PWM_FREQ		(1 << 3)
+#define ASLC_SUPPORTED_ROTATION_ANGLES	(1 << 4)
+#define ASLC_BUTTON_ARRAY		(1 << 5)
+#define ASLC_CONVERTIBLE_INDICATOR	(1 << 6)
+#define ASLC_DOCKING_INDICATOR		(1 << 7)
+#define ASLC_ISCT_STATE_CHANGE		(1 << 8)
+#define ASLC_REQ_MSK			0x1ff
+/* response bits */
+#define ASLC_ALS_ILLUM_FAILED		(1 << 10)
+#define ASLC_BACKLIGHT_FAILED		(1 << 12)
+#define ASLC_PFIT_FAILED		(1 << 14)
+#define ASLC_PWM_FREQ_FAILED		(1 << 16)
+#define ASLC_ROTATION_ANGLES_FAILED	(1 << 18)
+#define ASLC_BUTTON_ARRAY_FAILED	(1 << 20)
+#define ASLC_CONVERTIBLE_FAILED		(1 << 22)
+#define ASLC_DOCKING_FAILED		(1 << 24)
+#define ASLC_ISCT_STATE_FAILED		(1 << 26)
+
+/* Technology enabled indicator */
+#define ASLE_TCHE_ALS_EN	(1 << 0)
+#define ASLE_TCHE_BLC_EN	(1 << 1)
+#define ASLE_TCHE_PFIT_EN	(1 << 2)
+#define ASLE_TCHE_PFMB_EN	(1 << 3)
+
+/* ASLE backlight brightness to set */
+#define ASLE_BCLP_VALID                (1<<31)
+#define ASLE_BCLP_MSK          (~(1<<31))
+
+/* ASLE panel fitting request */
+#define ASLE_PFIT_VALID         (1<<31)
+#define ASLE_PFIT_CENTER (1<<0)
+#define ASLE_PFIT_STRETCH_TEXT (1<<1)
+#define ASLE_PFIT_STRETCH_GFX (1<<2)
+
+/* PWM frequency and minimum brightness */
+#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
+#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
+#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
+#define ASLE_PFMB_PWM_VALID (1<<31)
+
+#define ASLE_CBLV_VALID         (1<<31)
+
+/* IUER */
+#define ASLE_IUER_DOCKING		(1 << 7)
+#define ASLE_IUER_CONVERTIBLE		(1 << 6)
+#define ASLE_IUER_ROTATION_LOCK_BTN	(1 << 4)
+#define ASLE_IUER_VOLUME_DOWN_BTN	(1 << 3)
+#define ASLE_IUER_VOLUME_UP_BTN		(1 << 2)
+#define ASLE_IUER_WINDOWS_BTN		(1 << 1)
+#define ASLE_IUER_POWER_BTN		(1 << 0)
+
+/* Software System Control Interrupt (SWSCI) */
+#define SWSCI_SCIC_INDICATOR		(1 << 0)
+#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT	1
+#define SWSCI_SCIC_MAIN_FUNCTION_MASK	(0xf << 1)
+#define SWSCI_SCIC_SUB_FUNCTION_SHIFT	8
+#define SWSCI_SCIC_SUB_FUNCTION_MASK	(0xff << 8)
+#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT	8
+#define SWSCI_SCIC_EXIT_PARAMETER_MASK	(0xff << 8)
+#define SWSCI_SCIC_EXIT_STATUS_SHIFT	5
+#define SWSCI_SCIC_EXIT_STATUS_MASK	(7 << 5)
+#define SWSCI_SCIC_EXIT_STATUS_SUCCESS	1
+
+#define SWSCI_FUNCTION_CODE(main, sub) \
+	((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
+	 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
+
+/* SWSCI: Get BIOS Data (GBDA) */
+#define SWSCI_GBDA			4
+#define SWSCI_GBDA_SUPPORTED_CALLS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
+#define SWSCI_GBDA_REQUESTED_CALLBACKS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
+#define SWSCI_GBDA_BOOT_DISPLAY_PREF	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
+#define SWSCI_GBDA_PANEL_DETAILS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
+#define SWSCI_GBDA_TV_STANDARD		SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
+#define SWSCI_GBDA_INTERNAL_GRAPHICS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
+#define SWSCI_GBDA_SPREAD_SPECTRUM	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
+
+/* SWSCI: System BIOS Callbacks (SBCB) */
+#define SWSCI_SBCB			6
+#define SWSCI_SBCB_SUPPORTED_CALLBACKS	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
+#define SWSCI_SBCB_INIT_COMPLETION	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
+#define SWSCI_SBCB_PRE_HIRES_SET_MODE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
+#define SWSCI_SBCB_POST_HIRES_SET_MODE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
+#define SWSCI_SBCB_DISPLAY_SWITCH	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
+#define SWSCI_SBCB_SET_TV_FORMAT	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
+#define SWSCI_SBCB_ADAPTER_POWER_STATE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
+#define SWSCI_SBCB_DISPLAY_POWER_STATE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
+#define SWSCI_SBCB_SET_BOOT_DISPLAY	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
+#define SWSCI_SBCB_SET_PANEL_DETAILS	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
+#define SWSCI_SBCB_SET_INTERNAL_GFX	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
+#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
+#define SWSCI_SBCB_SUSPEND_RESUME	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
+#define SWSCI_SBCB_SET_SPREAD_SPECTRUM	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
+#define SWSCI_SBCB_POST_VBE_PM		SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
+#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
+
+/*
+ * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
+ * Attached to the Display Adapter).
+ */
+#define ACPI_DISPLAY_INDEX_SHIFT		0
+#define ACPI_DISPLAY_INDEX_MASK			(0xf << 0)
+#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT	4
+#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK	(0xf << 4)
+#define ACPI_DISPLAY_TYPE_SHIFT			8
+#define ACPI_DISPLAY_TYPE_MASK			(0xf << 8)
+#define ACPI_DISPLAY_TYPE_OTHER			(0 << 8)
+#define ACPI_DISPLAY_TYPE_VGA			(1 << 8)
+#define ACPI_DISPLAY_TYPE_TV			(2 << 8)
+#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL	(3 << 8)
+#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL	(4 << 8)
+#define ACPI_VENDOR_SPECIFIC_SHIFT		12
+#define ACPI_VENDOR_SPECIFIC_MASK		(0xf << 12)
+#define ACPI_BIOS_CAN_DETECT			(1 << 16)
+#define ACPI_DEPENDS_ON_VGA			(1 << 17)
+#define ACPI_PIPE_ID_SHIFT			18
+#define ACPI_PIPE_ID_MASK			(7 << 18)
+#define ACPI_DEVICE_ID_SCHEME			(1 << 31)
+
+#define MAX_DSLP	1500
+
+static int swsci(struct drm_i915_private *dev_priv,
+		 u32 function, u32 parm, u32 *parm_out)
+{
+	struct opregion_swsci *swsci = dev_priv->opregion.swsci;
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u32 main_function, sub_function, scic;
+	u16 swsci_val;
+	u32 dslp;
+
+	if (!swsci)
+		return -ENODEV;
+
+	main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
+		SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
+	sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
+		SWSCI_SCIC_SUB_FUNCTION_SHIFT;
+
+	/* Check if we can call the function. See swsci_setup for details. */
+	if (main_function == SWSCI_SBCB) {
+		if ((dev_priv->opregion.swsci_sbcb_sub_functions &
+		     (1 << sub_function)) == 0)
+			return -EINVAL;
+	} else if (main_function == SWSCI_GBDA) {
+		if ((dev_priv->opregion.swsci_gbda_sub_functions &
+		     (1 << sub_function)) == 0)
+			return -EINVAL;
+	}
+
+	/* Driver sleep timeout in ms. */
+	dslp = swsci->dslp;
+	if (!dslp) {
+		/* The spec says 2ms should be the default, but it's too small
+		 * for some machines. */
+		dslp = 50;
+	} else if (dslp > MAX_DSLP) {
+		/* Hey bios, trust must be earned. */
+		DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
+			      "using %u ms instead\n", dslp, MAX_DSLP);
+		dslp = MAX_DSLP;
+	}
+
+	/* The spec tells us to do this, but we are the only user... */
+	scic = swsci->scic;
+	if (scic & SWSCI_SCIC_INDICATOR) {
+		DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
+		return -EBUSY;
+	}
+
+	scic = function | SWSCI_SCIC_INDICATOR;
+
+	swsci->parm = parm;
+	swsci->scic = scic;
+
+	/* Ensure SCI event is selected and event trigger is cleared. */
+	pci_read_config_word(pdev, SWSCI, &swsci_val);
+	if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
+		swsci_val |= SWSCI_SCISEL;
+		swsci_val &= ~SWSCI_GSSCIE;
+		pci_write_config_word(pdev, SWSCI, swsci_val);
+	}
+
+	/* Use event trigger to tell bios to check the mail. */
+	swsci_val |= SWSCI_GSSCIE;
+	pci_write_config_word(pdev, SWSCI, swsci_val);
+
+	/* Poll for the result. */
+#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
+	if (wait_for(C, dslp)) {
+		DRM_DEBUG_DRIVER("SWSCI request timed out\n");
+		return -ETIMEDOUT;
+	}
+
+	scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
+		SWSCI_SCIC_EXIT_STATUS_SHIFT;
+
+	/* Note: scic == 0 is an error! */
+	if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
+		DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
+		return -EIO;
+	}
+
+	if (parm_out)
+		*parm_out = swsci->parm;
+
+	return 0;
+
+#undef C
+}
+
+#define DISPLAY_TYPE_CRT			0
+#define DISPLAY_TYPE_TV				1
+#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL	2
+#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL	3
+
+int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
+				  bool enable)
+{
+	struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
+	u32 parm = 0;
+	u32 type = 0;
+	u32 port;
+
+	/* don't care about old stuff for now */
+	if (!HAS_DDI(dev_priv))
+		return 0;
+
+	if (intel_encoder->type == INTEL_OUTPUT_DSI)
+		port = 0;
+	else
+		port = intel_encoder->port;
+
+	if (port == PORT_E)  {
+		port = 0;
+	} else {
+		parm |= 1 << port;
+		port++;
+	}
+
+	if (!enable)
+		parm |= 4 << 8;
+
+	switch (intel_encoder->type) {
+	case INTEL_OUTPUT_ANALOG:
+		type = DISPLAY_TYPE_CRT;
+		break;
+	case INTEL_OUTPUT_DDI:
+	case INTEL_OUTPUT_DP:
+	case INTEL_OUTPUT_HDMI:
+	case INTEL_OUTPUT_DP_MST:
+		type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
+		break;
+	case INTEL_OUTPUT_EDP:
+	case INTEL_OUTPUT_DSI:
+		type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
+		break;
+	default:
+		WARN_ONCE(1, "unsupported intel_encoder type %d\n",
+			  intel_encoder->type);
+		return -EINVAL;
+	}
+
+	parm |= type << (16 + port * 3);
+
+	return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
+}
+
+static const struct {
+	pci_power_t pci_power_state;
+	u32 parm;
+} power_state_map[] = {
+	{ PCI_D0,	0x00 },
+	{ PCI_D1,	0x01 },
+	{ PCI_D2,	0x02 },
+	{ PCI_D3hot,	0x04 },
+	{ PCI_D3cold,	0x04 },
+};
+
+int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
+				  pci_power_t state)
+{
+	int i;
+
+	if (!HAS_DDI(dev_priv))
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
+		if (state == power_state_map[i].pci_power_state)
+			return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
+				     power_state_map[i].parm, NULL);
+	}
+
+	return -EINVAL;
+}
+
+static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
+{
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	struct opregion_asle *asle = dev_priv->opregion.asle;
+	struct drm_device *dev = &dev_priv->drm;
+
+	DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
+
+	if (acpi_video_get_backlight_type() == acpi_backlight_native) {
+		DRM_DEBUG_KMS("opregion backlight request ignored\n");
+		return 0;
+	}
+
+	if (!(bclp & ASLE_BCLP_VALID))
+		return ASLC_BACKLIGHT_FAILED;
+
+	bclp &= ASLE_BCLP_MSK;
+	if (bclp > 255)
+		return ASLC_BACKLIGHT_FAILED;
+
+	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+
+	/*
+	 * Update backlight on all connectors that support backlight (usually
+	 * only one).
+	 */
+	DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter)
+		intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
+	drm_connector_list_iter_end(&conn_iter);
+	asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
+
+	drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+
+	return 0;
+}
+
+static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
+{
+	/* alsi is the current ALS reading in lux. 0 indicates below sensor
+	   range, 0xffff indicates above sensor range. 1-0xfffe are valid */
+	DRM_DEBUG_DRIVER("Illum is not supported\n");
+	return ASLC_ALS_ILLUM_FAILED;
+}
+
+static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
+{
+	DRM_DEBUG_DRIVER("PWM freq is not supported\n");
+	return ASLC_PWM_FREQ_FAILED;
+}
+
+static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
+{
+	/* Panel fitting is currently controlled by the X code, so this is a
+	   noop until modesetting support works fully */
+	DRM_DEBUG_DRIVER("Pfit is not supported\n");
+	return ASLC_PFIT_FAILED;
+}
+
+static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
+{
+	DRM_DEBUG_DRIVER("SROT is not supported\n");
+	return ASLC_ROTATION_ANGLES_FAILED;
+}
+
+static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
+{
+	if (!iuer)
+		DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
+	if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
+		DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
+	if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
+		DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
+	if (iuer & ASLE_IUER_VOLUME_UP_BTN)
+		DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
+	if (iuer & ASLE_IUER_WINDOWS_BTN)
+		DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
+	if (iuer & ASLE_IUER_POWER_BTN)
+		DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
+
+	return ASLC_BUTTON_ARRAY_FAILED;
+}
+
+static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
+{
+	if (iuer & ASLE_IUER_CONVERTIBLE)
+		DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
+	else
+		DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
+
+	return ASLC_CONVERTIBLE_FAILED;
+}
+
+static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
+{
+	if (iuer & ASLE_IUER_DOCKING)
+		DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
+	else
+		DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
+
+	return ASLC_DOCKING_FAILED;
+}
+
+static u32 asle_isct_state(struct drm_i915_private *dev_priv)
+{
+	DRM_DEBUG_DRIVER("ISCT is not supported\n");
+	return ASLC_ISCT_STATE_FAILED;
+}
+
+static void asle_work(struct work_struct *work)
+{
+	struct intel_opregion *opregion =
+		container_of(work, struct intel_opregion, asle_work);
+	struct drm_i915_private *dev_priv =
+		container_of(opregion, struct drm_i915_private, opregion);
+	struct opregion_asle *asle = dev_priv->opregion.asle;
+	u32 aslc_stat = 0;
+	u32 aslc_req;
+
+	if (!asle)
+		return;
+
+	aslc_req = asle->aslc;
+
+	if (!(aslc_req & ASLC_REQ_MSK)) {
+		DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
+				 aslc_req);
+		return;
+	}
+
+	if (aslc_req & ASLC_SET_ALS_ILLUM)
+		aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
+
+	if (aslc_req & ASLC_SET_BACKLIGHT)
+		aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
+
+	if (aslc_req & ASLC_SET_PFIT)
+		aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
+
+	if (aslc_req & ASLC_SET_PWM_FREQ)
+		aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
+
+	if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
+		aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
+							asle->srot);
+
+	if (aslc_req & ASLC_BUTTON_ARRAY)
+		aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
+
+	if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
+		aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
+
+	if (aslc_req & ASLC_DOCKING_INDICATOR)
+		aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
+
+	if (aslc_req & ASLC_ISCT_STATE_CHANGE)
+		aslc_stat |= asle_isct_state(dev_priv);
+
+	asle->aslc = aslc_stat;
+}
+
+void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
+{
+	if (dev_priv->opregion.asle)
+		schedule_work(&dev_priv->opregion.asle_work);
+}
+
+#define ACPI_EV_DISPLAY_SWITCH (1<<0)
+#define ACPI_EV_LID            (1<<1)
+#define ACPI_EV_DOCK           (1<<2)
+
+/*
+ * The only video events relevant to opregion are 0x80. These indicate either a
+ * docking event, lid switch or display switch request. In Linux, these are
+ * handled by the dock, button and video drivers.
+ */
+static int intel_opregion_video_event(struct notifier_block *nb,
+				      unsigned long val, void *data)
+{
+	struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
+						       acpi_notifier);
+	struct acpi_bus_event *event = data;
+	struct opregion_acpi *acpi;
+	int ret = NOTIFY_OK;
+
+	if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
+		return NOTIFY_DONE;
+
+	acpi = opregion->acpi;
+
+	if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
+		ret = NOTIFY_BAD;
+
+	acpi->csts = 0;
+
+	return ret;
+}
+
+/*
+ * Initialise the DIDL field in opregion. This passes a list of devices to
+ * the firmware. Values are defined by section B.4.2 of the ACPI specification
+ * (version 3)
+ */
+
+static void set_did(struct intel_opregion *opregion, int i, u32 val)
+{
+	if (i < ARRAY_SIZE(opregion->acpi->didl)) {
+		opregion->acpi->didl[i] = val;
+	} else {
+		i -= ARRAY_SIZE(opregion->acpi->didl);
+
+		if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
+			return;
+
+		opregion->acpi->did2[i] = val;
+	}
+}
+
+static u32 acpi_display_type(struct intel_connector *connector)
+{
+	u32 display_type;
+
+	switch (connector->base.connector_type) {
+	case DRM_MODE_CONNECTOR_VGA:
+	case DRM_MODE_CONNECTOR_DVIA:
+		display_type = ACPI_DISPLAY_TYPE_VGA;
+		break;
+	case DRM_MODE_CONNECTOR_Composite:
+	case DRM_MODE_CONNECTOR_SVIDEO:
+	case DRM_MODE_CONNECTOR_Component:
+	case DRM_MODE_CONNECTOR_9PinDIN:
+	case DRM_MODE_CONNECTOR_TV:
+		display_type = ACPI_DISPLAY_TYPE_TV;
+		break;
+	case DRM_MODE_CONNECTOR_DVII:
+	case DRM_MODE_CONNECTOR_DVID:
+	case DRM_MODE_CONNECTOR_DisplayPort:
+	case DRM_MODE_CONNECTOR_HDMIA:
+	case DRM_MODE_CONNECTOR_HDMIB:
+		display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
+		break;
+	case DRM_MODE_CONNECTOR_LVDS:
+	case DRM_MODE_CONNECTOR_eDP:
+	case DRM_MODE_CONNECTOR_DSI:
+		display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
+		break;
+	case DRM_MODE_CONNECTOR_Unknown:
+	case DRM_MODE_CONNECTOR_VIRTUAL:
+		display_type = ACPI_DISPLAY_TYPE_OTHER;
+		break;
+	default:
+		MISSING_CASE(connector->base.connector_type);
+		display_type = ACPI_DISPLAY_TYPE_OTHER;
+		break;
+	}
+
+	return display_type;
+}
+
+static void intel_didl_outputs(struct drm_i915_private *dev_priv)
+{
+	struct intel_opregion *opregion = &dev_priv->opregion;
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	int i = 0, max_outputs;
+	int display_index[16] = {};
+
+	/*
+	 * In theory, did2, the extended didl, gets added at opregion version
+	 * 3.0. In practice, however, we're supposed to set it for earlier
+	 * versions as well, since a BIOS that doesn't understand did2 should
+	 * not look at it anyway. Use a variable so we can tweak this if a need
+	 * arises later.
+	 */
+	max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
+		ARRAY_SIZE(opregion->acpi->did2);
+
+	drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		u32 device_id, type;
+
+		device_id = acpi_display_type(connector);
+
+		/* Use display type specific display index. */
+		type = (device_id & ACPI_DISPLAY_TYPE_MASK)
+			>> ACPI_DISPLAY_TYPE_SHIFT;
+		device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
+
+		connector->acpi_device_id = device_id;
+		if (i < max_outputs)
+			set_did(opregion, i, device_id);
+		i++;
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	DRM_DEBUG_KMS("%d outputs detected\n", i);
+
+	if (i > max_outputs)
+		DRM_ERROR("More than %d outputs in connector list\n",
+			  max_outputs);
+
+	/* If fewer than max outputs, the list must be null terminated */
+	if (i < max_outputs)
+		set_did(opregion, i, 0);
+}
+
+static void intel_setup_cadls(struct drm_i915_private *dev_priv)
+{
+	struct intel_opregion *opregion = &dev_priv->opregion;
+	struct intel_connector *connector;
+	struct drm_connector_list_iter conn_iter;
+	int i = 0;
+
+	/*
+	 * Initialize the CADL field from the connector device ids. This is
+	 * essentially the same as copying from the DIDL. Technically, this is
+	 * not always correct as display outputs may exist, but not active. This
+	 * initialization is necessary for some Clevo laptops that check this
+	 * field before processing the brightness and display switching hotkeys.
+	 *
+	 * Note that internal panels should be at the front of the connector
+	 * list already, ensuring they're not left out.
+	 */
+	drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (i >= ARRAY_SIZE(opregion->acpi->cadl))
+			break;
+		opregion->acpi->cadl[i++] = connector->acpi_device_id;
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	/* If fewer than 8 active devices, the list must be null terminated */
+	if (i < ARRAY_SIZE(opregion->acpi->cadl))
+		opregion->acpi->cadl[i] = 0;
+}
+
+static void swsci_setup(struct drm_i915_private *dev_priv)
+{
+	struct intel_opregion *opregion = &dev_priv->opregion;
+	bool requested_callbacks = false;
+	u32 tmp;
+
+	/* Sub-function code 0 is okay, let's allow them. */
+	opregion->swsci_gbda_sub_functions = 1;
+	opregion->swsci_sbcb_sub_functions = 1;
+
+	/* We use GBDA to ask for supported GBDA calls. */
+	if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
+		/* make the bits match the sub-function codes */
+		tmp <<= 1;
+		opregion->swsci_gbda_sub_functions |= tmp;
+	}
+
+	/*
+	 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
+	 * must not call interfaces that are not specifically requested by the
+	 * bios.
+	 */
+	if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
+		/* here, the bits already match sub-function codes */
+		opregion->swsci_sbcb_sub_functions |= tmp;
+		requested_callbacks = true;
+	}
+
+	/*
+	 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
+	 * the callback is _requested_. But we still can't call interfaces that
+	 * are not requested.
+	 */
+	if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
+		/* make the bits match the sub-function codes */
+		u32 low = tmp & 0x7ff;
+		u32 high = tmp & ~0xfff; /* bit 11 is reserved */
+		tmp = (high << 4) | (low << 1) | 1;
+
+		/* best guess what to do with supported wrt requested */
+		if (requested_callbacks) {
+			u32 req = opregion->swsci_sbcb_sub_functions;
+			if ((req & tmp) != req)
+				DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
+			/* XXX: for now, trust the requested callbacks */
+			/* opregion->swsci_sbcb_sub_functions &= tmp; */
+		} else {
+			opregion->swsci_sbcb_sub_functions |= tmp;
+		}
+	}
+
+	DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
+			 opregion->swsci_gbda_sub_functions,
+			 opregion->swsci_sbcb_sub_functions);
+}
+
+static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
+{
+	DRM_DEBUG_KMS("Falling back to manually reading VBT from "
+		      "VBIOS ROM for %s\n", id->ident);
+	return 1;
+}
+
+static const struct dmi_system_id intel_no_opregion_vbt[] = {
+	{
+		.callback = intel_no_opregion_vbt_callback,
+		.ident = "ThinkCentre A57",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
+		},
+	},
+	{ }
+};
+
+static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
+{
+	struct intel_opregion *opregion = &dev_priv->opregion;
+	const struct firmware *fw = NULL;
+	const char *name = i915_modparams.vbt_firmware;
+	int ret;
+
+	if (!name || !*name)
+		return -ENOENT;
+
+	ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
+	if (ret) {
+		DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
+			  name, ret);
+		return ret;
+	}
+
+	if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
+		opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
+		if (opregion->vbt_firmware) {
+			DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
+			opregion->vbt = opregion->vbt_firmware;
+			opregion->vbt_size = fw->size;
+			ret = 0;
+		} else {
+			ret = -ENOMEM;
+		}
+	} else {
+		DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
+		ret = -EINVAL;
+	}
+
+	release_firmware(fw);
+
+	return ret;
+}
+
+int intel_opregion_setup(struct drm_i915_private *dev_priv)
+{
+	struct intel_opregion *opregion = &dev_priv->opregion;
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u32 asls, mboxes;
+	char buf[sizeof(OPREGION_SIGNATURE)];
+	int err = 0;
+	void *base;
+	const void *vbt;
+	u32 vbt_size;
+
+	BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
+	BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
+	BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
+	BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
+	BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
+
+	pci_read_config_dword(pdev, ASLS, &asls);
+	DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
+	if (asls == 0) {
+		DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
+		return -ENOTSUPP;
+	}
+
+	INIT_WORK(&opregion->asle_work, asle_work);
+
+	base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
+	if (!base)
+		return -ENOMEM;
+
+	memcpy(buf, base, sizeof(buf));
+
+	if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
+		DRM_DEBUG_DRIVER("opregion signature mismatch\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+	opregion->header = base;
+	opregion->lid_state = base + ACPI_CLID;
+
+	DRM_DEBUG_DRIVER("ACPI OpRegion version %u.%u.%u\n",
+			 opregion->header->over.major,
+			 opregion->header->over.minor,
+			 opregion->header->over.revision);
+
+	mboxes = opregion->header->mboxes;
+	if (mboxes & MBOX_ACPI) {
+		DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
+		opregion->acpi = base + OPREGION_ACPI_OFFSET;
+	}
+
+	if (mboxes & MBOX_SWSCI) {
+		DRM_DEBUG_DRIVER("SWSCI supported\n");
+		opregion->swsci = base + OPREGION_SWSCI_OFFSET;
+		swsci_setup(dev_priv);
+	}
+
+	if (mboxes & MBOX_ASLE) {
+		DRM_DEBUG_DRIVER("ASLE supported\n");
+		opregion->asle = base + OPREGION_ASLE_OFFSET;
+
+		opregion->asle->ardy = ASLE_ARDY_NOT_READY;
+	}
+
+	if (mboxes & MBOX_ASLE_EXT)
+		DRM_DEBUG_DRIVER("ASLE extension supported\n");
+
+	if (intel_load_vbt_firmware(dev_priv) == 0)
+		goto out;
+
+	if (dmi_check_system(intel_no_opregion_vbt))
+		goto out;
+
+	if (opregion->header->over.major >= 2 && opregion->asle &&
+	    opregion->asle->rvda && opregion->asle->rvds) {
+		resource_size_t rvda = opregion->asle->rvda;
+
+		/*
+		 * opregion 2.0: rvda is the physical VBT address.
+		 *
+		 * opregion 2.1+: rvda is unsigned, relative offset from
+		 * opregion base, and should never point within opregion.
+		 */
+		if (opregion->header->over.major > 2 ||
+		    opregion->header->over.minor >= 1) {
+			WARN_ON(rvda < OPREGION_SIZE);
+
+			rvda += asls;
+		}
+
+		opregion->rvda = memremap(rvda, opregion->asle->rvds,
+					  MEMREMAP_WB);
+
+		vbt = opregion->rvda;
+		vbt_size = opregion->asle->rvds;
+		if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
+			DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
+			opregion->vbt = vbt;
+			opregion->vbt_size = vbt_size;
+			goto out;
+		} else {
+			DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
+			memunmap(opregion->rvda);
+			opregion->rvda = NULL;
+		}
+	}
+
+	vbt = base + OPREGION_VBT_OFFSET;
+	/*
+	 * The VBT specification says that if the ASLE ext mailbox is not used
+	 * its area is reserved, but on some CHT boards the VBT extends into the
+	 * ASLE ext area. Allow this even though it is against the spec, so we
+	 * do not end up rejecting the VBT on those boards (and end up not
+	 * finding the LCD panel because of this).
+	 */
+	vbt_size = (mboxes & MBOX_ASLE_EXT) ?
+		OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
+	vbt_size -= OPREGION_VBT_OFFSET;
+	if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
+		DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
+		opregion->vbt = vbt;
+		opregion->vbt_size = vbt_size;
+	} else {
+		DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
+	}
+
+out:
+	return 0;
+
+err_out:
+	memunmap(base);
+	return err;
+}
+
+static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
+{
+	DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
+	return 1;
+}
+
+static const struct dmi_system_id intel_use_opregion_panel_type[] = {
+	{
+		.callback = intel_use_opregion_panel_type_callback,
+		.ident = "Conrac GmbH IX45GM2",
+		.matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
+			    DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
+		},
+	},
+	{ }
+};
+
+int
+intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
+{
+	u32 panel_details;
+	int ret;
+
+	ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
+	if (ret) {
+		DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
+			      ret);
+		return ret;
+	}
+
+	ret = (panel_details >> 8) & 0xff;
+	if (ret > 0x10) {
+		DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
+		return -EINVAL;
+	}
+
+	/* fall back to VBT panel type? */
+	if (ret == 0x0) {
+		DRM_DEBUG_KMS("No panel type in OpRegion\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * So far we know that some machined must use it, others must not use it.
+	 * There doesn't seem to be any way to determine which way to go, except
+	 * via a quirk list :(
+	 */
+	if (!dmi_check_system(intel_use_opregion_panel_type)) {
+		DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
+		return -ENODEV;
+	}
+
+	return ret - 1;
+}
+
+void intel_opregion_register(struct drm_i915_private *i915)
+{
+	struct intel_opregion *opregion = &i915->opregion;
+
+	if (!opregion->header)
+		return;
+
+	if (opregion->acpi) {
+		opregion->acpi_notifier.notifier_call =
+			intel_opregion_video_event;
+		register_acpi_notifier(&opregion->acpi_notifier);
+	}
+
+	intel_opregion_resume(i915);
+}
+
+void intel_opregion_resume(struct drm_i915_private *i915)
+{
+	struct intel_opregion *opregion = &i915->opregion;
+
+	if (!opregion->header)
+		return;
+
+	if (opregion->acpi) {
+		intel_didl_outputs(i915);
+		intel_setup_cadls(i915);
+
+		/*
+		 * Notify BIOS we are ready to handle ACPI video ext notifs.
+		 * Right now, all the events are handled by the ACPI video
+		 * module. We don't actually need to do anything with them.
+		 */
+		opregion->acpi->csts = 0;
+		opregion->acpi->drdy = 1;
+	}
+
+	if (opregion->asle) {
+		opregion->asle->tche = ASLE_TCHE_BLC_EN;
+		opregion->asle->ardy = ASLE_ARDY_READY;
+	}
+
+	intel_opregion_notify_adapter(i915, PCI_D0);
+}
+
+void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
+{
+	struct intel_opregion *opregion = &i915->opregion;
+
+	if (!opregion->header)
+		return;
+
+	intel_opregion_notify_adapter(i915, state);
+
+	if (opregion->asle)
+		opregion->asle->ardy = ASLE_ARDY_NOT_READY;
+
+	cancel_work_sync(&i915->opregion.asle_work);
+
+	if (opregion->acpi)
+		opregion->acpi->drdy = 0;
+}
+
+void intel_opregion_unregister(struct drm_i915_private *i915)
+{
+	struct intel_opregion *opregion = &i915->opregion;
+
+	intel_opregion_suspend(i915, PCI_D1);
+
+	if (!opregion->header)
+		return;
+
+	if (opregion->acpi_notifier.notifier_call) {
+		unregister_acpi_notifier(&opregion->acpi_notifier);
+		opregion->acpi_notifier.notifier_call = NULL;
+	}
+
+	/* just clear all opregion memory pointers now */
+	memunmap(opregion->header);
+	if (opregion->rvda) {
+		memunmap(opregion->rvda);
+		opregion->rvda = NULL;
+	}
+	if (opregion->vbt_firmware) {
+		kfree(opregion->vbt_firmware);
+		opregion->vbt_firmware = NULL;
+	}
+	opregion->header = NULL;
+	opregion->acpi = NULL;
+	opregion->swsci = NULL;
+	opregion->asle = NULL;
+	opregion->vbt = NULL;
+	opregion->lid_state = NULL;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.h b/drivers/gpu/drm/i915/display/intel_opregion.h
new file mode 100644
index 000000000000..4aa68ffbd30e
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_opregion.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright © 2008-2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#ifndef _INTEL_OPREGION_H_
+#define _INTEL_OPREGION_H_
+
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+
+struct drm_i915_private;
+struct intel_encoder;
+
+struct opregion_header;
+struct opregion_acpi;
+struct opregion_swsci;
+struct opregion_asle;
+
+struct intel_opregion {
+	struct opregion_header *header;
+	struct opregion_acpi *acpi;
+	struct opregion_swsci *swsci;
+	u32 swsci_gbda_sub_functions;
+	u32 swsci_sbcb_sub_functions;
+	struct opregion_asle *asle;
+	void *rvda;
+	void *vbt_firmware;
+	const void *vbt;
+	u32 vbt_size;
+	u32 *lid_state;
+	struct work_struct asle_work;
+	struct notifier_block acpi_notifier;
+};
+
+#define OPREGION_SIZE            (8 * 1024)
+
+#ifdef CONFIG_ACPI
+
+int intel_opregion_setup(struct drm_i915_private *dev_priv);
+
+void intel_opregion_register(struct drm_i915_private *dev_priv);
+void intel_opregion_unregister(struct drm_i915_private *dev_priv);
+
+void intel_opregion_resume(struct drm_i915_private *dev_priv);
+void intel_opregion_suspend(struct drm_i915_private *dev_priv,
+			    pci_power_t state);
+
+void intel_opregion_asle_intr(struct drm_i915_private *dev_priv);
+int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
+				  bool enable);
+int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
+				  pci_power_t state);
+int intel_opregion_get_panel_type(struct drm_i915_private *dev_priv);
+
+#else /* CONFIG_ACPI*/
+
+static inline int intel_opregion_setup(struct drm_i915_private *dev_priv)
+{
+	return 0;
+}
+
+static inline void intel_opregion_register(struct drm_i915_private *dev_priv)
+{
+}
+
+static inline void intel_opregion_unregister(struct drm_i915_private *dev_priv)
+{
+}
+
+static inline void intel_opregion_resume(struct drm_i915_private *dev_priv)
+{
+}
+
+static inline void intel_opregion_suspend(struct drm_i915_private *dev_priv,
+					  pci_power_t state)
+{
+}
+
+static inline void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
+{
+}
+
+static inline int
+intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable)
+{
+	return 0;
+}
+
+static inline int
+intel_opregion_notify_adapter(struct drm_i915_private *dev, pci_power_t state)
+{
+	return 0;
+}
+
+static inline int intel_opregion_get_panel_type(struct drm_i915_private *dev)
+{
+	return -ENODEV;
+}
+
+#endif /* CONFIG_ACPI */
+
+#endif
diff --git a/drivers/gpu/drm/i915/display/intel_overlay.c b/drivers/gpu/drm/i915/display/intel_overlay.c
new file mode 100644
index 000000000000..21339b7f6a3e
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_overlay.c
@@ -0,0 +1,1497 @@
+/*
+ * Copyright © 2009
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Daniel Vetter <daniel@ffwll.ch>
+ *
+ * Derived from Xorg ddx, xf86-video-intel, src/i830_video.c
+ */
+
+#include <drm/drm_fourcc.h>
+#include <drm/i915_drm.h>
+
+#include "gem/i915_gem_pm.h"
+
+#include "i915_drv.h"
+#include "i915_reg.h"
+#include "intel_drv.h"
+#include "intel_frontbuffer.h"
+#include "intel_overlay.h"
+
+/* Limits for overlay size. According to intel doc, the real limits are:
+ * Y width: 4095, UV width (planar): 2047, Y height: 2047,
+ * UV width (planar): * 1023. But the xorg thinks 2048 for height and width. Use
+ * the mininum of both.  */
+#define IMAGE_MAX_WIDTH		2048
+#define IMAGE_MAX_HEIGHT	2046 /* 2 * 1023 */
+/* on 830 and 845 these large limits result in the card hanging */
+#define IMAGE_MAX_WIDTH_LEGACY	1024
+#define IMAGE_MAX_HEIGHT_LEGACY	1088
+
+/* overlay register definitions */
+/* OCMD register */
+#define OCMD_TILED_SURFACE	(0x1<<19)
+#define OCMD_MIRROR_MASK	(0x3<<17)
+#define OCMD_MIRROR_MODE	(0x3<<17)
+#define OCMD_MIRROR_HORIZONTAL	(0x1<<17)
+#define OCMD_MIRROR_VERTICAL	(0x2<<17)
+#define OCMD_MIRROR_BOTH	(0x3<<17)
+#define OCMD_BYTEORDER_MASK	(0x3<<14) /* zero for YUYV or FOURCC YUY2 */
+#define OCMD_UV_SWAP		(0x1<<14) /* YVYU */
+#define OCMD_Y_SWAP		(0x2<<14) /* UYVY or FOURCC UYVY */
+#define OCMD_Y_AND_UV_SWAP	(0x3<<14) /* VYUY */
+#define OCMD_SOURCE_FORMAT_MASK (0xf<<10)
+#define OCMD_RGB_888		(0x1<<10) /* not in i965 Intel docs */
+#define OCMD_RGB_555		(0x2<<10) /* not in i965 Intel docs */
+#define OCMD_RGB_565		(0x3<<10) /* not in i965 Intel docs */
+#define OCMD_YUV_422_PACKED	(0x8<<10)
+#define OCMD_YUV_411_PACKED	(0x9<<10) /* not in i965 Intel docs */
+#define OCMD_YUV_420_PLANAR	(0xc<<10)
+#define OCMD_YUV_422_PLANAR	(0xd<<10)
+#define OCMD_YUV_410_PLANAR	(0xe<<10) /* also 411 */
+#define OCMD_TVSYNCFLIP_PARITY	(0x1<<9)
+#define OCMD_TVSYNCFLIP_ENABLE	(0x1<<7)
+#define OCMD_BUF_TYPE_MASK	(0x1<<5)
+#define OCMD_BUF_TYPE_FRAME	(0x0<<5)
+#define OCMD_BUF_TYPE_FIELD	(0x1<<5)
+#define OCMD_TEST_MODE		(0x1<<4)
+#define OCMD_BUFFER_SELECT	(0x3<<2)
+#define OCMD_BUFFER0		(0x0<<2)
+#define OCMD_BUFFER1		(0x1<<2)
+#define OCMD_FIELD_SELECT	(0x1<<2)
+#define OCMD_FIELD0		(0x0<<1)
+#define OCMD_FIELD1		(0x1<<1)
+#define OCMD_ENABLE		(0x1<<0)
+
+/* OCONFIG register */
+#define OCONF_PIPE_MASK		(0x1<<18)
+#define OCONF_PIPE_A		(0x0<<18)
+#define OCONF_PIPE_B		(0x1<<18)
+#define OCONF_GAMMA2_ENABLE	(0x1<<16)
+#define OCONF_CSC_MODE_BT601	(0x0<<5)
+#define OCONF_CSC_MODE_BT709	(0x1<<5)
+#define OCONF_CSC_BYPASS	(0x1<<4)
+#define OCONF_CC_OUT_8BIT	(0x1<<3)
+#define OCONF_TEST_MODE		(0x1<<2)
+#define OCONF_THREE_LINE_BUFFER	(0x1<<0)
+#define OCONF_TWO_LINE_BUFFER	(0x0<<0)
+
+/* DCLRKM (dst-key) register */
+#define DST_KEY_ENABLE		(0x1<<31)
+#define CLK_RGB24_MASK		0x0
+#define CLK_RGB16_MASK		0x070307
+#define CLK_RGB15_MASK		0x070707
+#define CLK_RGB8I_MASK		0xffffff
+
+#define RGB16_TO_COLORKEY(c) \
+	(((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))
+#define RGB15_TO_COLORKEY(c) \
+	(((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))
+
+/* overlay flip addr flag */
+#define OFC_UPDATE		0x1
+
+/* polyphase filter coefficients */
+#define N_HORIZ_Y_TAPS          5
+#define N_VERT_Y_TAPS           3
+#define N_HORIZ_UV_TAPS         3
+#define N_VERT_UV_TAPS          3
+#define N_PHASES                17
+#define MAX_TAPS                5
+
+/* memory bufferd overlay registers */
+struct overlay_registers {
+	u32 OBUF_0Y;
+	u32 OBUF_1Y;
+	u32 OBUF_0U;
+	u32 OBUF_0V;
+	u32 OBUF_1U;
+	u32 OBUF_1V;
+	u32 OSTRIDE;
+	u32 YRGB_VPH;
+	u32 UV_VPH;
+	u32 HORZ_PH;
+	u32 INIT_PHS;
+	u32 DWINPOS;
+	u32 DWINSZ;
+	u32 SWIDTH;
+	u32 SWIDTHSW;
+	u32 SHEIGHT;
+	u32 YRGBSCALE;
+	u32 UVSCALE;
+	u32 OCLRC0;
+	u32 OCLRC1;
+	u32 DCLRKV;
+	u32 DCLRKM;
+	u32 SCLRKVH;
+	u32 SCLRKVL;
+	u32 SCLRKEN;
+	u32 OCONFIG;
+	u32 OCMD;
+	u32 RESERVED1; /* 0x6C */
+	u32 OSTART_0Y;
+	u32 OSTART_1Y;
+	u32 OSTART_0U;
+	u32 OSTART_0V;
+	u32 OSTART_1U;
+	u32 OSTART_1V;
+	u32 OTILEOFF_0Y;
+	u32 OTILEOFF_1Y;
+	u32 OTILEOFF_0U;
+	u32 OTILEOFF_0V;
+	u32 OTILEOFF_1U;
+	u32 OTILEOFF_1V;
+	u32 FASTHSCALE; /* 0xA0 */
+	u32 UVSCALEV; /* 0xA4 */
+	u32 RESERVEDC[(0x200 - 0xA8) / 4]; /* 0xA8 - 0x1FC */
+	u16 Y_VCOEFS[N_VERT_Y_TAPS * N_PHASES]; /* 0x200 */
+	u16 RESERVEDD[0x100 / 2 - N_VERT_Y_TAPS * N_PHASES];
+	u16 Y_HCOEFS[N_HORIZ_Y_TAPS * N_PHASES]; /* 0x300 */
+	u16 RESERVEDE[0x200 / 2 - N_HORIZ_Y_TAPS * N_PHASES];
+	u16 UV_VCOEFS[N_VERT_UV_TAPS * N_PHASES]; /* 0x500 */
+	u16 RESERVEDF[0x100 / 2 - N_VERT_UV_TAPS * N_PHASES];
+	u16 UV_HCOEFS[N_HORIZ_UV_TAPS * N_PHASES]; /* 0x600 */
+	u16 RESERVEDG[0x100 / 2 - N_HORIZ_UV_TAPS * N_PHASES];
+};
+
+struct intel_overlay {
+	struct drm_i915_private *i915;
+	struct intel_crtc *crtc;
+	struct i915_vma *vma;
+	struct i915_vma *old_vma;
+	bool active;
+	bool pfit_active;
+	u32 pfit_vscale_ratio; /* shifted-point number, (1<<12) == 1.0 */
+	u32 color_key:24;
+	u32 color_key_enabled:1;
+	u32 brightness, contrast, saturation;
+	u32 old_xscale, old_yscale;
+	/* register access */
+	struct drm_i915_gem_object *reg_bo;
+	struct overlay_registers __iomem *regs;
+	u32 flip_addr;
+	/* flip handling */
+	struct i915_active_request last_flip;
+};
+
+static void i830_overlay_clock_gating(struct drm_i915_private *dev_priv,
+				      bool enable)
+{
+	struct pci_dev *pdev = dev_priv->drm.pdev;
+	u8 val;
+
+	/* WA_OVERLAY_CLKGATE:alm */
+	if (enable)
+		I915_WRITE(DSPCLK_GATE_D, 0);
+	else
+		I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
+
+	/* WA_DISABLE_L2CACHE_CLOCK_GATING:alm */
+	pci_bus_read_config_byte(pdev->bus,
+				 PCI_DEVFN(0, 0), I830_CLOCK_GATE, &val);
+	if (enable)
+		val &= ~I830_L2_CACHE_CLOCK_GATE_DISABLE;
+	else
+		val |= I830_L2_CACHE_CLOCK_GATE_DISABLE;
+	pci_bus_write_config_byte(pdev->bus,
+				  PCI_DEVFN(0, 0), I830_CLOCK_GATE, val);
+}
+
+static void intel_overlay_submit_request(struct intel_overlay *overlay,
+					 struct i915_request *rq,
+					 i915_active_retire_fn retire)
+{
+	GEM_BUG_ON(i915_active_request_peek(&overlay->last_flip,
+					    &overlay->i915->drm.struct_mutex));
+	i915_active_request_set_retire_fn(&overlay->last_flip, retire,
+					  &overlay->i915->drm.struct_mutex);
+	__i915_active_request_set(&overlay->last_flip, rq);
+	i915_request_add(rq);
+}
+
+static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
+					 struct i915_request *rq,
+					 i915_active_retire_fn retire)
+{
+	intel_overlay_submit_request(overlay, rq, retire);
+	return i915_active_request_retire(&overlay->last_flip,
+					  &overlay->i915->drm.struct_mutex);
+}
+
+static struct i915_request *alloc_request(struct intel_overlay *overlay)
+{
+	struct intel_engine_cs *engine = overlay->i915->engine[RCS0];
+
+	return i915_request_create(engine->kernel_context);
+}
+
+/* overlay needs to be disable in OCMD reg */
+static int intel_overlay_on(struct intel_overlay *overlay)
+{
+	struct drm_i915_private *dev_priv = overlay->i915;
+	struct i915_request *rq;
+	u32 *cs;
+
+	WARN_ON(overlay->active);
+
+	rq = alloc_request(overlay);
+	if (IS_ERR(rq))
+		return PTR_ERR(rq);
+
+	cs = intel_ring_begin(rq, 4);
+	if (IS_ERR(cs)) {
+		i915_request_add(rq);
+		return PTR_ERR(cs);
+	}
+
+	overlay->active = true;
+
+	if (IS_I830(dev_priv))
+		i830_overlay_clock_gating(dev_priv, false);
+
+	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_ON;
+	*cs++ = overlay->flip_addr | OFC_UPDATE;
+	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
+	*cs++ = MI_NOOP;
+	intel_ring_advance(rq, cs);
+
+	return intel_overlay_do_wait_request(overlay, rq, NULL);
+}
+
+static void intel_overlay_flip_prepare(struct intel_overlay *overlay,
+				       struct i915_vma *vma)
+{
+	enum pipe pipe = overlay->crtc->pipe;
+
+	WARN_ON(overlay->old_vma);
+
+	i915_gem_track_fb(overlay->vma ? overlay->vma->obj : NULL,
+			  vma ? vma->obj : NULL,
+			  INTEL_FRONTBUFFER_OVERLAY(pipe));
+
+	intel_frontbuffer_flip_prepare(overlay->i915,
+				       INTEL_FRONTBUFFER_OVERLAY(pipe));
+
+	overlay->old_vma = overlay->vma;
+	if (vma)
+		overlay->vma = i915_vma_get(vma);
+	else
+		overlay->vma = NULL;
+}
+
+/* overlay needs to be enabled in OCMD reg */
+static int intel_overlay_continue(struct intel_overlay *overlay,
+				  struct i915_vma *vma,
+				  bool load_polyphase_filter)
+{
+	struct drm_i915_private *dev_priv = overlay->i915;
+	struct i915_request *rq;
+	u32 flip_addr = overlay->flip_addr;
+	u32 tmp, *cs;
+
+	WARN_ON(!overlay->active);
+
+	if (load_polyphase_filter)
+		flip_addr |= OFC_UPDATE;
+
+	/* check for underruns */
+	tmp = I915_READ(DOVSTA);
+	if (tmp & (1 << 17))
+		DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
+
+	rq = alloc_request(overlay);
+	if (IS_ERR(rq))
+		return PTR_ERR(rq);
+
+	cs = intel_ring_begin(rq, 2);
+	if (IS_ERR(cs)) {
+		i915_request_add(rq);
+		return PTR_ERR(cs);
+	}
+
+	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
+	*cs++ = flip_addr;
+	intel_ring_advance(rq, cs);
+
+	intel_overlay_flip_prepare(overlay, vma);
+
+	intel_overlay_submit_request(overlay, rq, NULL);
+
+	return 0;
+}
+
+static void intel_overlay_release_old_vma(struct intel_overlay *overlay)
+{
+	struct i915_vma *vma;
+
+	vma = fetch_and_zero(&overlay->old_vma);
+	if (WARN_ON(!vma))
+		return;
+
+	intel_frontbuffer_flip_complete(overlay->i915,
+					INTEL_FRONTBUFFER_OVERLAY(overlay->crtc->pipe));
+
+	i915_gem_object_unpin_from_display_plane(vma);
+	i915_vma_put(vma);
+}
+
+static void
+intel_overlay_release_old_vid_tail(struct i915_active_request *active,
+				   struct i915_request *rq)
+{
+	struct intel_overlay *overlay =
+		container_of(active, typeof(*overlay), last_flip);
+
+	intel_overlay_release_old_vma(overlay);
+}
+
+static void intel_overlay_off_tail(struct i915_active_request *active,
+				   struct i915_request *rq)
+{
+	struct intel_overlay *overlay =
+		container_of(active, typeof(*overlay), last_flip);
+	struct drm_i915_private *dev_priv = overlay->i915;
+
+	intel_overlay_release_old_vma(overlay);
+
+	overlay->crtc->overlay = NULL;
+	overlay->crtc = NULL;
+	overlay->active = false;
+
+	if (IS_I830(dev_priv))
+		i830_overlay_clock_gating(dev_priv, true);
+}
+
+/* overlay needs to be disabled in OCMD reg */
+static int intel_overlay_off(struct intel_overlay *overlay)
+{
+	struct i915_request *rq;
+	u32 *cs, flip_addr = overlay->flip_addr;
+
+	WARN_ON(!overlay->active);
+
+	/* According to intel docs the overlay hw may hang (when switching
+	 * off) without loading the filter coeffs. It is however unclear whether
+	 * this applies to the disabling of the overlay or to the switching off
+	 * of the hw. Do it in both cases */
+	flip_addr |= OFC_UPDATE;
+
+	rq = alloc_request(overlay);
+	if (IS_ERR(rq))
+		return PTR_ERR(rq);
+
+	cs = intel_ring_begin(rq, 6);
+	if (IS_ERR(cs)) {
+		i915_request_add(rq);
+		return PTR_ERR(cs);
+	}
+
+	/* wait for overlay to go idle */
+	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE;
+	*cs++ = flip_addr;
+	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
+
+	/* turn overlay off */
+	*cs++ = MI_OVERLAY_FLIP | MI_OVERLAY_OFF;
+	*cs++ = flip_addr;
+	*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
+
+	intel_ring_advance(rq, cs);
+
+	intel_overlay_flip_prepare(overlay, NULL);
+
+	return intel_overlay_do_wait_request(overlay, rq,
+					     intel_overlay_off_tail);
+}
+
+/* recover from an interruption due to a signal
+ * We have to be careful not to repeat work forever an make forward progess. */
+static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay)
+{
+	return i915_active_request_retire(&overlay->last_flip,
+					  &overlay->i915->drm.struct_mutex);
+}
+
+/* Wait for pending overlay flip and release old frame.
+ * Needs to be called before the overlay register are changed
+ * via intel_overlay_(un)map_regs
+ */
+static int intel_overlay_release_old_vid(struct intel_overlay *overlay)
+{
+	struct drm_i915_private *dev_priv = overlay->i915;
+	u32 *cs;
+	int ret;
+
+	lockdep_assert_held(&dev_priv->drm.struct_mutex);
+
+	/* Only wait if there is actually an old frame to release to
+	 * guarantee forward progress.
+	 */
+	if (!overlay->old_vma)
+		return 0;
+
+	if (I915_READ(GEN2_ISR) & I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT) {
+		/* synchronous slowpath */
+		struct i915_request *rq;
+
+		rq = alloc_request(overlay);
+		if (IS_ERR(rq))
+			return PTR_ERR(rq);
+
+		cs = intel_ring_begin(rq, 2);
+		if (IS_ERR(cs)) {
+			i915_request_add(rq);
+			return PTR_ERR(cs);
+		}
+
+		*cs++ = MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP;
+		*cs++ = MI_NOOP;
+		intel_ring_advance(rq, cs);
+
+		ret = intel_overlay_do_wait_request(overlay, rq,
+						    intel_overlay_release_old_vid_tail);
+		if (ret)
+			return ret;
+	} else
+		intel_overlay_release_old_vid_tail(&overlay->last_flip, NULL);
+
+	return 0;
+}
+
+void intel_overlay_reset(struct drm_i915_private *dev_priv)
+{
+	struct intel_overlay *overlay = dev_priv->overlay;
+
+	if (!overlay)
+		return;
+
+	overlay->old_xscale = 0;
+	overlay->old_yscale = 0;
+	overlay->crtc = NULL;
+	overlay->active = false;
+}
+
+static int packed_depth_bytes(u32 format)
+{
+	switch (format & I915_OVERLAY_DEPTH_MASK) {
+	case I915_OVERLAY_YUV422:
+		return 4;
+	case I915_OVERLAY_YUV411:
+		/* return 6; not implemented */
+	default:
+		return -EINVAL;
+	}
+}
+
+static int packed_width_bytes(u32 format, short width)
+{
+	switch (format & I915_OVERLAY_DEPTH_MASK) {
+	case I915_OVERLAY_YUV422:
+		return width << 1;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int uv_hsubsampling(u32 format)
+{
+	switch (format & I915_OVERLAY_DEPTH_MASK) {
+	case I915_OVERLAY_YUV422:
+	case I915_OVERLAY_YUV420:
+		return 2;
+	case I915_OVERLAY_YUV411:
+	case I915_OVERLAY_YUV410:
+		return 4;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int uv_vsubsampling(u32 format)
+{
+	switch (format & I915_OVERLAY_DEPTH_MASK) {
+	case I915_OVERLAY_YUV420:
+	case I915_OVERLAY_YUV410:
+		return 2;
+	case I915_OVERLAY_YUV422:
+	case I915_OVERLAY_YUV411:
+		return 1;
+	default:
+		return -EINVAL;
+	}
+}
+
+static u32 calc_swidthsw(struct drm_i915_private *dev_priv, u32 offset, u32 width)
+{
+	u32 sw;
+
+	if (IS_GEN(dev_priv, 2))
+		sw = ALIGN((offset & 31) + width, 32);
+	else
+		sw = ALIGN((offset & 63) + width, 64);
+
+	if (sw == 0)
+		return 0;
+
+	return (sw - 32) >> 3;
+}
+
+static const u16 y_static_hcoeffs[N_PHASES][N_HORIZ_Y_TAPS] = {
+	[ 0] = { 0x3000, 0xb4a0, 0x1930, 0x1920, 0xb4a0, },
+	[ 1] = { 0x3000, 0xb500, 0x19d0, 0x1880, 0xb440, },
+	[ 2] = { 0x3000, 0xb540, 0x1a88, 0x2f80, 0xb3e0, },
+	[ 3] = { 0x3000, 0xb580, 0x1b30, 0x2e20, 0xb380, },
+	[ 4] = { 0x3000, 0xb5c0, 0x1bd8, 0x2cc0, 0xb320, },
+	[ 5] = { 0x3020, 0xb5e0, 0x1c60, 0x2b80, 0xb2c0, },
+	[ 6] = { 0x3020, 0xb5e0, 0x1cf8, 0x2a20, 0xb260, },
+	[ 7] = { 0x3020, 0xb5e0, 0x1d80, 0x28e0, 0xb200, },
+	[ 8] = { 0x3020, 0xb5c0, 0x1e08, 0x3f40, 0xb1c0, },
+	[ 9] = { 0x3020, 0xb580, 0x1e78, 0x3ce0, 0xb160, },
+	[10] = { 0x3040, 0xb520, 0x1ed8, 0x3aa0, 0xb120, },
+	[11] = { 0x3040, 0xb4a0, 0x1f30, 0x3880, 0xb0e0, },
+	[12] = { 0x3040, 0xb400, 0x1f78, 0x3680, 0xb0a0, },
+	[13] = { 0x3020, 0xb340, 0x1fb8, 0x34a0, 0xb060, },
+	[14] = { 0x3020, 0xb240, 0x1fe0, 0x32e0, 0xb040, },
+	[15] = { 0x3020, 0xb140, 0x1ff8, 0x3160, 0xb020, },
+	[16] = { 0xb000, 0x3000, 0x0800, 0x3000, 0xb000, },
+};
+
+static const u16 uv_static_hcoeffs[N_PHASES][N_HORIZ_UV_TAPS] = {
+	[ 0] = { 0x3000, 0x1800, 0x1800, },
+	[ 1] = { 0xb000, 0x18d0, 0x2e60, },
+	[ 2] = { 0xb000, 0x1990, 0x2ce0, },
+	[ 3] = { 0xb020, 0x1a68, 0x2b40, },
+	[ 4] = { 0xb040, 0x1b20, 0x29e0, },
+	[ 5] = { 0xb060, 0x1bd8, 0x2880, },
+	[ 6] = { 0xb080, 0x1c88, 0x3e60, },
+	[ 7] = { 0xb0a0, 0x1d28, 0x3c00, },
+	[ 8] = { 0xb0c0, 0x1db8, 0x39e0, },
+	[ 9] = { 0xb0e0, 0x1e40, 0x37e0, },
+	[10] = { 0xb100, 0x1eb8, 0x3620, },
+	[11] = { 0xb100, 0x1f18, 0x34a0, },
+	[12] = { 0xb100, 0x1f68, 0x3360, },
+	[13] = { 0xb0e0, 0x1fa8, 0x3240, },
+	[14] = { 0xb0c0, 0x1fe0, 0x3140, },
+	[15] = { 0xb060, 0x1ff0, 0x30a0, },
+	[16] = { 0x3000, 0x0800, 0x3000, },
+};
+
+static void update_polyphase_filter(struct overlay_registers __iomem *regs)
+{
+	memcpy_toio(regs->Y_HCOEFS, y_static_hcoeffs, sizeof(y_static_hcoeffs));
+	memcpy_toio(regs->UV_HCOEFS, uv_static_hcoeffs,
+		    sizeof(uv_static_hcoeffs));
+}
+
+static bool update_scaling_factors(struct intel_overlay *overlay,
+				   struct overlay_registers __iomem *regs,
+				   struct drm_intel_overlay_put_image *params)
+{
+	/* fixed point with a 12 bit shift */
+	u32 xscale, yscale, xscale_UV, yscale_UV;
+#define FP_SHIFT 12
+#define FRACT_MASK 0xfff
+	bool scale_changed = false;
+	int uv_hscale = uv_hsubsampling(params->flags);
+	int uv_vscale = uv_vsubsampling(params->flags);
+
+	if (params->dst_width > 1)
+		xscale = ((params->src_scan_width - 1) << FP_SHIFT) /
+			params->dst_width;
+	else
+		xscale = 1 << FP_SHIFT;
+
+	if (params->dst_height > 1)
+		yscale = ((params->src_scan_height - 1) << FP_SHIFT) /
+			params->dst_height;
+	else
+		yscale = 1 << FP_SHIFT;
+
+	/*if (params->format & I915_OVERLAY_YUV_PLANAR) {*/
+	xscale_UV = xscale/uv_hscale;
+	yscale_UV = yscale/uv_vscale;
+	/* make the Y scale to UV scale ratio an exact multiply */
+	xscale = xscale_UV * uv_hscale;
+	yscale = yscale_UV * uv_vscale;
+	/*} else {
+	  xscale_UV = 0;
+	  yscale_UV = 0;
+	  }*/
+
+	if (xscale != overlay->old_xscale || yscale != overlay->old_yscale)
+		scale_changed = true;
+	overlay->old_xscale = xscale;
+	overlay->old_yscale = yscale;
+
+	iowrite32(((yscale & FRACT_MASK) << 20) |
+		  ((xscale >> FP_SHIFT)  << 16) |
+		  ((xscale & FRACT_MASK) << 3),
+		 &regs->YRGBSCALE);
+
+	iowrite32(((yscale_UV & FRACT_MASK) << 20) |
+		  ((xscale_UV >> FP_SHIFT)  << 16) |
+		  ((xscale_UV & FRACT_MASK) << 3),
+		 &regs->UVSCALE);
+
+	iowrite32((((yscale    >> FP_SHIFT) << 16) |
+		   ((yscale_UV >> FP_SHIFT) << 0)),
+		 &regs->UVSCALEV);
+
+	if (scale_changed)
+		update_polyphase_filter(regs);
+
+	return scale_changed;
+}
+
+static void update_colorkey(struct intel_overlay *overlay,
+			    struct overlay_registers __iomem *regs)
+{
+	const struct intel_plane_state *state =
+		to_intel_plane_state(overlay->crtc->base.primary->state);
+	u32 key = overlay->color_key;
+	u32 format = 0;
+	u32 flags = 0;
+
+	if (overlay->color_key_enabled)
+		flags |= DST_KEY_ENABLE;
+
+	if (state->base.visible)
+		format = state->base.fb->format->format;
+
+	switch (format) {
+	case DRM_FORMAT_C8:
+		key = 0;
+		flags |= CLK_RGB8I_MASK;
+		break;
+	case DRM_FORMAT_XRGB1555:
+		key = RGB15_TO_COLORKEY(key);
+		flags |= CLK_RGB15_MASK;
+		break;
+	case DRM_FORMAT_RGB565:
+		key = RGB16_TO_COLORKEY(key);
+		flags |= CLK_RGB16_MASK;
+		break;
+	default:
+		flags |= CLK_RGB24_MASK;
+		break;
+	}
+
+	iowrite32(key, &regs->DCLRKV);
+	iowrite32(flags, &regs->DCLRKM);
+}
+
+static u32 overlay_cmd_reg(struct drm_intel_overlay_put_image *params)
+{
+	u32 cmd = OCMD_ENABLE | OCMD_BUF_TYPE_FRAME | OCMD_BUFFER0;
+
+	if (params->flags & I915_OVERLAY_YUV_PLANAR) {
+		switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
+		case I915_OVERLAY_YUV422:
+			cmd |= OCMD_YUV_422_PLANAR;
+			break;
+		case I915_OVERLAY_YUV420:
+			cmd |= OCMD_YUV_420_PLANAR;
+			break;
+		case I915_OVERLAY_YUV411:
+		case I915_OVERLAY_YUV410:
+			cmd |= OCMD_YUV_410_PLANAR;
+			break;
+		}
+	} else { /* YUV packed */
+		switch (params->flags & I915_OVERLAY_DEPTH_MASK) {
+		case I915_OVERLAY_YUV422:
+			cmd |= OCMD_YUV_422_PACKED;
+			break;
+		case I915_OVERLAY_YUV411:
+			cmd |= OCMD_YUV_411_PACKED;
+			break;
+		}
+
+		switch (params->flags & I915_OVERLAY_SWAP_MASK) {
+		case I915_OVERLAY_NO_SWAP:
+			break;
+		case I915_OVERLAY_UV_SWAP:
+			cmd |= OCMD_UV_SWAP;
+			break;
+		case I915_OVERLAY_Y_SWAP:
+			cmd |= OCMD_Y_SWAP;
+			break;
+		case I915_OVERLAY_Y_AND_UV_SWAP:
+			cmd |= OCMD_Y_AND_UV_SWAP;
+			break;
+		}
+	}
+
+	return cmd;
+}
+
+static int intel_overlay_do_put_image(struct intel_overlay *overlay,
+				      struct drm_i915_gem_object *new_bo,
+				      struct drm_intel_overlay_put_image *params)
+{
+	struct overlay_registers __iomem *regs = overlay->regs;
+	struct drm_i915_private *dev_priv = overlay->i915;
+	u32 swidth, swidthsw, sheight, ostride;
+	enum pipe pipe = overlay->crtc->pipe;
+	bool scale_changed = false;
+	struct i915_vma *vma;
+	int ret, tmp_width;
+
+	lockdep_assert_held(&dev_priv->drm.struct_mutex);
+	WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
+
+	ret = intel_overlay_release_old_vid(overlay);
+	if (ret != 0)
+		return ret;
+
+	atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
+
+	i915_gem_object_lock(new_bo);
+	vma = i915_gem_object_pin_to_display_plane(new_bo,
+						   0, NULL, PIN_MAPPABLE);
+	i915_gem_object_unlock(new_bo);
+	if (IS_ERR(vma)) {
+		ret = PTR_ERR(vma);
+		goto out_pin_section;
+	}
+	intel_fb_obj_flush(new_bo, ORIGIN_DIRTYFB);
+
+	ret = i915_vma_put_fence(vma);
+	if (ret)
+		goto out_unpin;
+
+	if (!overlay->active) {
+		u32 oconfig;
+
+		oconfig = OCONF_CC_OUT_8BIT;
+		if (IS_GEN(dev_priv, 4))
+			oconfig |= OCONF_CSC_MODE_BT709;
+		oconfig |= pipe == 0 ?
+			OCONF_PIPE_A : OCONF_PIPE_B;
+		iowrite32(oconfig, &regs->OCONFIG);
+
+		ret = intel_overlay_on(overlay);
+		if (ret != 0)
+			goto out_unpin;
+	}
+
+	iowrite32(params->dst_y << 16 | params->dst_x, &regs->DWINPOS);
+	iowrite32(params->dst_height << 16 | params->dst_width, &regs->DWINSZ);
+
+	if (params->flags & I915_OVERLAY_YUV_PACKED)
+		tmp_width = packed_width_bytes(params->flags,
+					       params->src_width);
+	else
+		tmp_width = params->src_width;
+
+	swidth = params->src_width;
+	swidthsw = calc_swidthsw(dev_priv, params->offset_Y, tmp_width);
+	sheight = params->src_height;
+	iowrite32(i915_ggtt_offset(vma) + params->offset_Y, &regs->OBUF_0Y);
+	ostride = params->stride_Y;
+
+	if (params->flags & I915_OVERLAY_YUV_PLANAR) {
+		int uv_hscale = uv_hsubsampling(params->flags);
+		int uv_vscale = uv_vsubsampling(params->flags);
+		u32 tmp_U, tmp_V;
+
+		swidth |= (params->src_width / uv_hscale) << 16;
+		sheight |= (params->src_height / uv_vscale) << 16;
+
+		tmp_U = calc_swidthsw(dev_priv, params->offset_U,
+				      params->src_width / uv_hscale);
+		tmp_V = calc_swidthsw(dev_priv, params->offset_V,
+				      params->src_width / uv_hscale);
+		swidthsw |= max(tmp_U, tmp_V) << 16;
+
+		iowrite32(i915_ggtt_offset(vma) + params->offset_U,
+			  &regs->OBUF_0U);
+		iowrite32(i915_ggtt_offset(vma) + params->offset_V,
+			  &regs->OBUF_0V);
+
+		ostride |= params->stride_UV << 16;
+	}
+
+	iowrite32(swidth, &regs->SWIDTH);
+	iowrite32(swidthsw, &regs->SWIDTHSW);
+	iowrite32(sheight, &regs->SHEIGHT);
+	iowrite32(ostride, &regs->OSTRIDE);
+
+	scale_changed = update_scaling_factors(overlay, regs, params);
+
+	update_colorkey(overlay, regs);
+
+	iowrite32(overlay_cmd_reg(params), &regs->OCMD);
+
+	ret = intel_overlay_continue(overlay, vma, scale_changed);
+	if (ret)
+		goto out_unpin;
+
+	return 0;
+
+out_unpin:
+	i915_gem_object_unpin_from_display_plane(vma);
+out_pin_section:
+	atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
+
+	return ret;
+}
+
+int intel_overlay_switch_off(struct intel_overlay *overlay)
+{
+	struct drm_i915_private *dev_priv = overlay->i915;
+	int ret;
+
+	lockdep_assert_held(&dev_priv->drm.struct_mutex);
+	WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
+
+	ret = intel_overlay_recover_from_interrupt(overlay);
+	if (ret != 0)
+		return ret;
+
+	if (!overlay->active)
+		return 0;
+
+	ret = intel_overlay_release_old_vid(overlay);
+	if (ret != 0)
+		return ret;
+
+	iowrite32(0, &overlay->regs->OCMD);
+
+	return intel_overlay_off(overlay);
+}
+
+static int check_overlay_possible_on_crtc(struct intel_overlay *overlay,
+					  struct intel_crtc *crtc)
+{
+	if (!crtc->active)
+		return -EINVAL;
+
+	/* can't use the overlay with double wide pipe */
+	if (crtc->config->double_wide)
+		return -EINVAL;
+
+	return 0;
+}
+
+static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
+{
+	struct drm_i915_private *dev_priv = overlay->i915;
+	u32 pfit_control = I915_READ(PFIT_CONTROL);
+	u32 ratio;
+
+	/* XXX: This is not the same logic as in the xorg driver, but more in
+	 * line with the intel documentation for the i965
+	 */
+	if (INTEL_GEN(dev_priv) >= 4) {
+		/* on i965 use the PGM reg to read out the autoscaler values */
+		ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
+	} else {
+		if (pfit_control & VERT_AUTO_SCALE)
+			ratio = I915_READ(PFIT_AUTO_RATIOS);
+		else
+			ratio = I915_READ(PFIT_PGM_RATIOS);
+		ratio >>= PFIT_VERT_SCALE_SHIFT;
+	}
+
+	overlay->pfit_vscale_ratio = ratio;
+}
+
+static int check_overlay_dst(struct intel_overlay *overlay,
+			     struct drm_intel_overlay_put_image *rec)
+{
+	const struct intel_crtc_state *pipe_config =
+		overlay->crtc->config;
+
+	if (rec->dst_x < pipe_config->pipe_src_w &&
+	    rec->dst_x + rec->dst_width <= pipe_config->pipe_src_w &&
+	    rec->dst_y < pipe_config->pipe_src_h &&
+	    rec->dst_y + rec->dst_height <= pipe_config->pipe_src_h)
+		return 0;
+	else
+		return -EINVAL;
+}
+
+static int check_overlay_scaling(struct drm_intel_overlay_put_image *rec)
+{
+	u32 tmp;
+
+	/* downscaling limit is 8.0 */
+	tmp = ((rec->src_scan_height << 16) / rec->dst_height) >> 16;
+	if (tmp > 7)
+		return -EINVAL;
+
+	tmp = ((rec->src_scan_width << 16) / rec->dst_width) >> 16;
+	if (tmp > 7)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int check_overlay_src(struct drm_i915_private *dev_priv,
+			     struct drm_intel_overlay_put_image *rec,
+			     struct drm_i915_gem_object *new_bo)
+{
+	int uv_hscale = uv_hsubsampling(rec->flags);
+	int uv_vscale = uv_vsubsampling(rec->flags);
+	u32 stride_mask;
+	int depth;
+	u32 tmp;
+
+	/* check src dimensions */
+	if (IS_I845G(dev_priv) || IS_I830(dev_priv)) {
+		if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
+		    rec->src_width  > IMAGE_MAX_WIDTH_LEGACY)
+			return -EINVAL;
+	} else {
+		if (rec->src_height > IMAGE_MAX_HEIGHT ||
+		    rec->src_width  > IMAGE_MAX_WIDTH)
+			return -EINVAL;
+	}
+
+	/* better safe than sorry, use 4 as the maximal subsampling ratio */
+	if (rec->src_height < N_VERT_Y_TAPS*4 ||
+	    rec->src_width  < N_HORIZ_Y_TAPS*4)
+		return -EINVAL;
+
+	/* check alignment constraints */
+	switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
+	case I915_OVERLAY_RGB:
+		/* not implemented */
+		return -EINVAL;
+
+	case I915_OVERLAY_YUV_PACKED:
+		if (uv_vscale != 1)
+			return -EINVAL;
+
+		depth = packed_depth_bytes(rec->flags);
+		if (depth < 0)
+			return depth;
+
+		/* ignore UV planes */
+		rec->stride_UV = 0;
+		rec->offset_U = 0;
+		rec->offset_V = 0;
+		/* check pixel alignment */
+		if (rec->offset_Y % depth)
+			return -EINVAL;
+		break;
+
+	case I915_OVERLAY_YUV_PLANAR:
+		if (uv_vscale < 0 || uv_hscale < 0)
+			return -EINVAL;
+		/* no offset restrictions for planar formats */
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	if (rec->src_width % uv_hscale)
+		return -EINVAL;
+
+	/* stride checking */
+	if (IS_I830(dev_priv) || IS_I845G(dev_priv))
+		stride_mask = 255;
+	else
+		stride_mask = 63;
+
+	if (rec->stride_Y & stride_mask || rec->stride_UV & stride_mask)
+		return -EINVAL;
+	if (IS_GEN(dev_priv, 4) && rec->stride_Y < 512)
+		return -EINVAL;
+
+	tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
+		4096 : 8192;
+	if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
+		return -EINVAL;
+
+	/* check buffer dimensions */
+	switch (rec->flags & I915_OVERLAY_TYPE_MASK) {
+	case I915_OVERLAY_RGB:
+	case I915_OVERLAY_YUV_PACKED:
+		/* always 4 Y values per depth pixels */
+		if (packed_width_bytes(rec->flags, rec->src_width) > rec->stride_Y)
+			return -EINVAL;
+
+		tmp = rec->stride_Y*rec->src_height;
+		if (rec->offset_Y + tmp > new_bo->base.size)
+			return -EINVAL;
+		break;
+
+	case I915_OVERLAY_YUV_PLANAR:
+		if (rec->src_width > rec->stride_Y)
+			return -EINVAL;
+		if (rec->src_width/uv_hscale > rec->stride_UV)
+			return -EINVAL;
+
+		tmp = rec->stride_Y * rec->src_height;
+		if (rec->offset_Y + tmp > new_bo->base.size)
+			return -EINVAL;
+
+		tmp = rec->stride_UV * (rec->src_height / uv_vscale);
+		if (rec->offset_U + tmp > new_bo->base.size ||
+		    rec->offset_V + tmp > new_bo->base.size)
+			return -EINVAL;
+		break;
+	}
+
+	return 0;
+}
+
+int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
+				  struct drm_file *file_priv)
+{
+	struct drm_intel_overlay_put_image *params = data;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_overlay *overlay;
+	struct drm_crtc *drmmode_crtc;
+	struct intel_crtc *crtc;
+	struct drm_i915_gem_object *new_bo;
+	int ret;
+
+	overlay = dev_priv->overlay;
+	if (!overlay) {
+		DRM_DEBUG("userspace bug: no overlay\n");
+		return -ENODEV;
+	}
+
+	if (!(params->flags & I915_OVERLAY_ENABLE)) {
+		drm_modeset_lock_all(dev);
+		mutex_lock(&dev->struct_mutex);
+
+		ret = intel_overlay_switch_off(overlay);
+
+		mutex_unlock(&dev->struct_mutex);
+		drm_modeset_unlock_all(dev);
+
+		return ret;
+	}
+
+	drmmode_crtc = drm_crtc_find(dev, file_priv, params->crtc_id);
+	if (!drmmode_crtc)
+		return -ENOENT;
+	crtc = to_intel_crtc(drmmode_crtc);
+
+	new_bo = i915_gem_object_lookup(file_priv, params->bo_handle);
+	if (!new_bo)
+		return -ENOENT;
+
+	drm_modeset_lock_all(dev);
+	mutex_lock(&dev->struct_mutex);
+
+	if (i915_gem_object_is_tiled(new_bo)) {
+		DRM_DEBUG_KMS("buffer used for overlay image can not be tiled\n");
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
+	ret = intel_overlay_recover_from_interrupt(overlay);
+	if (ret != 0)
+		goto out_unlock;
+
+	if (overlay->crtc != crtc) {
+		ret = intel_overlay_switch_off(overlay);
+		if (ret != 0)
+			goto out_unlock;
+
+		ret = check_overlay_possible_on_crtc(overlay, crtc);
+		if (ret != 0)
+			goto out_unlock;
+
+		overlay->crtc = crtc;
+		crtc->overlay = overlay;
+
+		/* line too wide, i.e. one-line-mode */
+		if (crtc->config->pipe_src_w > 1024 &&
+		    crtc->config->gmch_pfit.control & PFIT_ENABLE) {
+			overlay->pfit_active = true;
+			update_pfit_vscale_ratio(overlay);
+		} else
+			overlay->pfit_active = false;
+	}
+
+	ret = check_overlay_dst(overlay, params);
+	if (ret != 0)
+		goto out_unlock;
+
+	if (overlay->pfit_active) {
+		params->dst_y = (((u32)params->dst_y << 12) /
+				 overlay->pfit_vscale_ratio);
+		/* shifting right rounds downwards, so add 1 */
+		params->dst_height = (((u32)params->dst_height << 12) /
+				 overlay->pfit_vscale_ratio) + 1;
+	}
+
+	if (params->src_scan_height > params->src_height ||
+	    params->src_scan_width > params->src_width) {
+		ret = -EINVAL;
+		goto out_unlock;
+	}
+
+	ret = check_overlay_src(dev_priv, params, new_bo);
+	if (ret != 0)
+		goto out_unlock;
+
+	/* Check scaling after src size to prevent a divide-by-zero. */
+	ret = check_overlay_scaling(params);
+	if (ret != 0)
+		goto out_unlock;
+
+	ret = intel_overlay_do_put_image(overlay, new_bo, params);
+	if (ret != 0)
+		goto out_unlock;
+
+	mutex_unlock(&dev->struct_mutex);
+	drm_modeset_unlock_all(dev);
+	i915_gem_object_put(new_bo);
+
+	return 0;
+
+out_unlock:
+	mutex_unlock(&dev->struct_mutex);
+	drm_modeset_unlock_all(dev);
+	i915_gem_object_put(new_bo);
+
+	return ret;
+}
+
+static void update_reg_attrs(struct intel_overlay *overlay,
+			     struct overlay_registers __iomem *regs)
+{
+	iowrite32((overlay->contrast << 18) | (overlay->brightness & 0xff),
+		  &regs->OCLRC0);
+	iowrite32(overlay->saturation, &regs->OCLRC1);
+}
+
+static bool check_gamma_bounds(u32 gamma1, u32 gamma2)
+{
+	int i;
+
+	if (gamma1 & 0xff000000 || gamma2 & 0xff000000)
+		return false;
+
+	for (i = 0; i < 3; i++) {
+		if (((gamma1 >> i*8) & 0xff) >= ((gamma2 >> i*8) & 0xff))
+			return false;
+	}
+
+	return true;
+}
+
+static bool check_gamma5_errata(u32 gamma5)
+{
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		if (((gamma5 >> i*8) & 0xff) == 0x80)
+			return false;
+	}
+
+	return true;
+}
+
+static int check_gamma(struct drm_intel_overlay_attrs *attrs)
+{
+	if (!check_gamma_bounds(0, attrs->gamma0) ||
+	    !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||
+	    !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||
+	    !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||
+	    !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||
+	    !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||
+	    !check_gamma_bounds(attrs->gamma5, 0x00ffffff))
+		return -EINVAL;
+
+	if (!check_gamma5_errata(attrs->gamma5))
+		return -EINVAL;
+
+	return 0;
+}
+
+int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
+			      struct drm_file *file_priv)
+{
+	struct drm_intel_overlay_attrs *attrs = data;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_overlay *overlay;
+	int ret;
+
+	overlay = dev_priv->overlay;
+	if (!overlay) {
+		DRM_DEBUG("userspace bug: no overlay\n");
+		return -ENODEV;
+	}
+
+	drm_modeset_lock_all(dev);
+	mutex_lock(&dev->struct_mutex);
+
+	ret = -EINVAL;
+	if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
+		attrs->color_key  = overlay->color_key;
+		attrs->brightness = overlay->brightness;
+		attrs->contrast   = overlay->contrast;
+		attrs->saturation = overlay->saturation;
+
+		if (!IS_GEN(dev_priv, 2)) {
+			attrs->gamma0 = I915_READ(OGAMC0);
+			attrs->gamma1 = I915_READ(OGAMC1);
+			attrs->gamma2 = I915_READ(OGAMC2);
+			attrs->gamma3 = I915_READ(OGAMC3);
+			attrs->gamma4 = I915_READ(OGAMC4);
+			attrs->gamma5 = I915_READ(OGAMC5);
+		}
+	} else {
+		if (attrs->brightness < -128 || attrs->brightness > 127)
+			goto out_unlock;
+		if (attrs->contrast > 255)
+			goto out_unlock;
+		if (attrs->saturation > 1023)
+			goto out_unlock;
+
+		overlay->color_key  = attrs->color_key;
+		overlay->brightness = attrs->brightness;
+		overlay->contrast   = attrs->contrast;
+		overlay->saturation = attrs->saturation;
+
+		update_reg_attrs(overlay, overlay->regs);
+
+		if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {
+			if (IS_GEN(dev_priv, 2))
+				goto out_unlock;
+
+			if (overlay->active) {
+				ret = -EBUSY;
+				goto out_unlock;
+			}
+
+			ret = check_gamma(attrs);
+			if (ret)
+				goto out_unlock;
+
+			I915_WRITE(OGAMC0, attrs->gamma0);
+			I915_WRITE(OGAMC1, attrs->gamma1);
+			I915_WRITE(OGAMC2, attrs->gamma2);
+			I915_WRITE(OGAMC3, attrs->gamma3);
+			I915_WRITE(OGAMC4, attrs->gamma4);
+			I915_WRITE(OGAMC5, attrs->gamma5);
+		}
+	}
+	overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;
+
+	ret = 0;
+out_unlock:
+	mutex_unlock(&dev->struct_mutex);
+	drm_modeset_unlock_all(dev);
+
+	return ret;
+}
+
+static int get_registers(struct intel_overlay *overlay, bool use_phys)
+{
+	struct drm_i915_private *i915 = overlay->i915;
+	struct drm_i915_gem_object *obj;
+	struct i915_vma *vma;
+	int err;
+
+	mutex_lock(&i915->drm.struct_mutex);
+
+	obj = i915_gem_object_create_stolen(i915, PAGE_SIZE);
+	if (obj == NULL)
+		obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+	if (IS_ERR(obj)) {
+		err = PTR_ERR(obj);
+		goto err_unlock;
+	}
+
+	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
+	if (IS_ERR(vma)) {
+		err = PTR_ERR(vma);
+		goto err_put_bo;
+	}
+
+	if (use_phys)
+		overlay->flip_addr = sg_dma_address(obj->mm.pages->sgl);
+	else
+		overlay->flip_addr = i915_ggtt_offset(vma);
+	overlay->regs = i915_vma_pin_iomap(vma);
+	i915_vma_unpin(vma);
+
+	if (IS_ERR(overlay->regs)) {
+		err = PTR_ERR(overlay->regs);
+		goto err_put_bo;
+	}
+
+	overlay->reg_bo = obj;
+	mutex_unlock(&i915->drm.struct_mutex);
+	return 0;
+
+err_put_bo:
+	i915_gem_object_put(obj);
+err_unlock:
+	mutex_unlock(&i915->drm.struct_mutex);
+	return err;
+}
+
+void intel_overlay_setup(struct drm_i915_private *dev_priv)
+{
+	struct intel_overlay *overlay;
+	int ret;
+
+	if (!HAS_OVERLAY(dev_priv))
+		return;
+
+	overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
+	if (!overlay)
+		return;
+
+	overlay->i915 = dev_priv;
+
+	overlay->color_key = 0x0101fe;
+	overlay->color_key_enabled = true;
+	overlay->brightness = -19;
+	overlay->contrast = 75;
+	overlay->saturation = 146;
+
+	INIT_ACTIVE_REQUEST(&overlay->last_flip);
+
+	ret = get_registers(overlay, OVERLAY_NEEDS_PHYSICAL(dev_priv));
+	if (ret)
+		goto out_free;
+
+	memset_io(overlay->regs, 0, sizeof(struct overlay_registers));
+	update_polyphase_filter(overlay->regs);
+	update_reg_attrs(overlay, overlay->regs);
+
+	dev_priv->overlay = overlay;
+	DRM_INFO("Initialized overlay support.\n");
+	return;
+
+out_free:
+	kfree(overlay);
+}
+
+void intel_overlay_cleanup(struct drm_i915_private *dev_priv)
+{
+	struct intel_overlay *overlay;
+
+	overlay = fetch_and_zero(&dev_priv->overlay);
+	if (!overlay)
+		return;
+
+	/*
+	 * The bo's should be free'd by the generic code already.
+	 * Furthermore modesetting teardown happens beforehand so the
+	 * hardware should be off already.
+	 */
+	WARN_ON(overlay->active);
+
+	i915_gem_object_put(overlay->reg_bo);
+
+	kfree(overlay);
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+
+struct intel_overlay_error_state {
+	struct overlay_registers regs;
+	unsigned long base;
+	u32 dovsta;
+	u32 isr;
+};
+
+struct intel_overlay_error_state *
+intel_overlay_capture_error_state(struct drm_i915_private *dev_priv)
+{
+	struct intel_overlay *overlay = dev_priv->overlay;
+	struct intel_overlay_error_state *error;
+
+	if (!overlay || !overlay->active)
+		return NULL;
+
+	error = kmalloc(sizeof(*error), GFP_ATOMIC);
+	if (error == NULL)
+		return NULL;
+
+	error->dovsta = I915_READ(DOVSTA);
+	error->isr = I915_READ(GEN2_ISR);
+	error->base = overlay->flip_addr;
+
+	memcpy_fromio(&error->regs, overlay->regs, sizeof(error->regs));
+
+	return error;
+}
+
+void
+intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
+				struct intel_overlay_error_state *error)
+{
+	i915_error_printf(m, "Overlay, status: 0x%08x, interrupt: 0x%08x\n",
+			  error->dovsta, error->isr);
+	i915_error_printf(m, "  Register file at 0x%08lx:\n",
+			  error->base);
+
+#define P(x) i915_error_printf(m, "    " #x ":	0x%08x\n", error->regs.x)
+	P(OBUF_0Y);
+	P(OBUF_1Y);
+	P(OBUF_0U);
+	P(OBUF_0V);
+	P(OBUF_1U);
+	P(OBUF_1V);
+	P(OSTRIDE);
+	P(YRGB_VPH);
+	P(UV_VPH);
+	P(HORZ_PH);
+	P(INIT_PHS);
+	P(DWINPOS);
+	P(DWINSZ);
+	P(SWIDTH);
+	P(SWIDTHSW);
+	P(SHEIGHT);
+	P(YRGBSCALE);
+	P(UVSCALE);
+	P(OCLRC0);
+	P(OCLRC1);
+	P(DCLRKV);
+	P(DCLRKM);
+	P(SCLRKVH);
+	P(SCLRKVL);
+	P(SCLRKEN);
+	P(OCONFIG);
+	P(OCMD);
+	P(OSTART_0Y);
+	P(OSTART_1Y);
+	P(OSTART_0U);
+	P(OSTART_0V);
+	P(OSTART_1U);
+	P(OSTART_1V);
+	P(OTILEOFF_0Y);
+	P(OTILEOFF_1Y);
+	P(OTILEOFF_0U);
+	P(OTILEOFF_0V);
+	P(OTILEOFF_1U);
+	P(OTILEOFF_1V);
+	P(FASTHSCALE);
+	P(UVSCALEV);
+#undef P
+}
+
+#endif
diff --git a/drivers/gpu/drm/i915/display/intel_overlay.h b/drivers/gpu/drm/i915/display/intel_overlay.h
new file mode 100644
index 000000000000..a167c28acd27
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_overlay.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_OVERLAY_H__
+#define __INTEL_OVERLAY_H__
+
+struct drm_device;
+struct drm_file;
+struct drm_i915_error_state_buf;
+struct drm_i915_private;
+struct intel_overlay;
+struct intel_overlay_error_state;
+
+void intel_overlay_setup(struct drm_i915_private *dev_priv);
+void intel_overlay_cleanup(struct drm_i915_private *dev_priv);
+int intel_overlay_switch_off(struct intel_overlay *overlay);
+int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
+				  struct drm_file *file_priv);
+int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
+			      struct drm_file *file_priv);
+void intel_overlay_reset(struct drm_i915_private *dev_priv);
+struct intel_overlay_error_state *
+intel_overlay_capture_error_state(struct drm_i915_private *dev_priv);
+void intel_overlay_print_error_state(struct drm_i915_error_state_buf *e,
+				     struct intel_overlay_error_state *error);
+
+#endif /* __INTEL_OVERLAY_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_pipe_crc.c b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
new file mode 100644
index 000000000000..1e2c4307d05a
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
@@ -0,0 +1,671 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Author: Damien Lespiau <damien.lespiau@intel.com>
+ *
+ */
+
+#include <linux/circ_buf.h>
+#include <linux/ctype.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include "intel_atomic.h"
+#include "intel_drv.h"
+#include "intel_pipe_crc.h"
+
+static const char * const pipe_crc_sources[] = {
+	[INTEL_PIPE_CRC_SOURCE_NONE] = "none",
+	[INTEL_PIPE_CRC_SOURCE_PLANE1] = "plane1",
+	[INTEL_PIPE_CRC_SOURCE_PLANE2] = "plane2",
+	[INTEL_PIPE_CRC_SOURCE_PLANE3] = "plane3",
+	[INTEL_PIPE_CRC_SOURCE_PLANE4] = "plane4",
+	[INTEL_PIPE_CRC_SOURCE_PLANE5] = "plane5",
+	[INTEL_PIPE_CRC_SOURCE_PLANE6] = "plane6",
+	[INTEL_PIPE_CRC_SOURCE_PLANE7] = "plane7",
+	[INTEL_PIPE_CRC_SOURCE_PIPE] = "pipe",
+	[INTEL_PIPE_CRC_SOURCE_TV] = "TV",
+	[INTEL_PIPE_CRC_SOURCE_DP_B] = "DP-B",
+	[INTEL_PIPE_CRC_SOURCE_DP_C] = "DP-C",
+	[INTEL_PIPE_CRC_SOURCE_DP_D] = "DP-D",
+	[INTEL_PIPE_CRC_SOURCE_AUTO] = "auto",
+};
+
+static int i8xx_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source,
+				 u32 *val)
+{
+	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO)
+		*source = INTEL_PIPE_CRC_SOURCE_PIPE;
+
+	switch (*source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_INCLUDE_BORDER_I8XX;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
+				     enum pipe pipe,
+				     enum intel_pipe_crc_source *source)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct intel_encoder *encoder;
+	struct intel_crtc *crtc;
+	struct intel_digital_port *dig_port;
+	int ret = 0;
+
+	*source = INTEL_PIPE_CRC_SOURCE_PIPE;
+
+	drm_modeset_lock_all(dev);
+	for_each_intel_encoder(dev, encoder) {
+		if (!encoder->base.crtc)
+			continue;
+
+		crtc = to_intel_crtc(encoder->base.crtc);
+
+		if (crtc->pipe != pipe)
+			continue;
+
+		switch (encoder->type) {
+		case INTEL_OUTPUT_TVOUT:
+			*source = INTEL_PIPE_CRC_SOURCE_TV;
+			break;
+		case INTEL_OUTPUT_DP:
+		case INTEL_OUTPUT_EDP:
+			dig_port = enc_to_dig_port(&encoder->base);
+			switch (dig_port->base.port) {
+			case PORT_B:
+				*source = INTEL_PIPE_CRC_SOURCE_DP_B;
+				break;
+			case PORT_C:
+				*source = INTEL_PIPE_CRC_SOURCE_DP_C;
+				break;
+			case PORT_D:
+				*source = INTEL_PIPE_CRC_SOURCE_DP_D;
+				break;
+			default:
+				WARN(1, "nonexisting DP port %c\n",
+				     port_name(dig_port->base.port));
+				break;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+	drm_modeset_unlock_all(dev);
+
+	return ret;
+}
+
+static int vlv_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
+				enum pipe pipe,
+				enum intel_pipe_crc_source *source,
+				u32 *val)
+{
+	bool need_stable_symbols = false;
+
+	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO) {
+		int ret = i9xx_pipe_crc_auto_source(dev_priv, pipe, source);
+		if (ret)
+			return ret;
+	}
+
+	switch (*source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PIPE_VLV;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_DP_B:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_B_VLV;
+		need_stable_symbols = true;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_DP_C:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_C_VLV;
+		need_stable_symbols = true;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_DP_D:
+		if (!IS_CHERRYVIEW(dev_priv))
+			return -EINVAL;
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DP_D_VLV;
+		need_stable_symbols = true;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/*
+	 * When the pipe CRC tap point is after the transcoders we need
+	 * to tweak symbol-level features to produce a deterministic series of
+	 * symbols for a given frame. We need to reset those features only once
+	 * a frame (instead of every nth symbol):
+	 *   - DC-balance: used to ensure a better clock recovery from the data
+	 *     link (SDVO)
+	 *   - DisplayPort scrambling: used for EMI reduction
+	 */
+	if (need_stable_symbols) {
+		u32 tmp = I915_READ(PORT_DFT2_G4X);
+
+		tmp |= DC_BALANCE_RESET_VLV;
+		switch (pipe) {
+		case PIPE_A:
+			tmp |= PIPE_A_SCRAMBLE_RESET;
+			break;
+		case PIPE_B:
+			tmp |= PIPE_B_SCRAMBLE_RESET;
+			break;
+		case PIPE_C:
+			tmp |= PIPE_C_SCRAMBLE_RESET;
+			break;
+		default:
+			return -EINVAL;
+		}
+		I915_WRITE(PORT_DFT2_G4X, tmp);
+	}
+
+	return 0;
+}
+
+static int i9xx_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
+				 enum pipe pipe,
+				 enum intel_pipe_crc_source *source,
+				 u32 *val)
+{
+	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO) {
+		int ret = i9xx_pipe_crc_auto_source(dev_priv, pipe, source);
+		if (ret)
+			return ret;
+	}
+
+	switch (*source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PIPE_I9XX;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_TV:
+		if (!SUPPORTS_TV(dev_priv))
+			return -EINVAL;
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_TV_PRE;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		/*
+		 * The DP CRC source doesn't work on g4x.
+		 * It can be made to work to some degree by selecting
+		 * the correct CRC source before the port is enabled,
+		 * and not touching the CRC source bits again until
+		 * the port is disabled. But even then the bits
+		 * eventually get stuck and a reboot is needed to get
+		 * working CRCs on the pipe again. Let's simply
+		 * refuse to use DP CRCs on g4x.
+		 */
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void vlv_undo_pipe_scramble_reset(struct drm_i915_private *dev_priv,
+					 enum pipe pipe)
+{
+	u32 tmp = I915_READ(PORT_DFT2_G4X);
+
+	switch (pipe) {
+	case PIPE_A:
+		tmp &= ~PIPE_A_SCRAMBLE_RESET;
+		break;
+	case PIPE_B:
+		tmp &= ~PIPE_B_SCRAMBLE_RESET;
+		break;
+	case PIPE_C:
+		tmp &= ~PIPE_C_SCRAMBLE_RESET;
+		break;
+	default:
+		return;
+	}
+	if (!(tmp & PIPE_SCRAMBLE_RESET_MASK))
+		tmp &= ~DC_BALANCE_RESET_VLV;
+	I915_WRITE(PORT_DFT2_G4X, tmp);
+}
+
+static int ilk_pipe_crc_ctl_reg(enum intel_pipe_crc_source *source,
+				u32 *val)
+{
+	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO)
+		*source = INTEL_PIPE_CRC_SOURCE_PIPE;
+
+	switch (*source) {
+	case INTEL_PIPE_CRC_SOURCE_PLANE1:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PRIMARY_ILK;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE2:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_SPRITE_ILK;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PIPE_ILK;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void
+intel_crtc_crc_setup_workarounds(struct intel_crtc *crtc, bool enable)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_crtc_state *pipe_config;
+	struct drm_atomic_state *state;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+
+	drm_modeset_acquire_init(&ctx, 0);
+
+	state = drm_atomic_state_alloc(&dev_priv->drm);
+	if (!state) {
+		ret = -ENOMEM;
+		goto unlock;
+	}
+
+	state->acquire_ctx = &ctx;
+
+retry:
+	pipe_config = intel_atomic_get_crtc_state(state, crtc);
+	if (IS_ERR(pipe_config)) {
+		ret = PTR_ERR(pipe_config);
+		goto put_state;
+	}
+
+	pipe_config->base.mode_changed = pipe_config->has_psr;
+	pipe_config->crc_enabled = enable;
+
+	if (IS_HASWELL(dev_priv) &&
+	    pipe_config->base.active && crtc->pipe == PIPE_A &&
+	    pipe_config->cpu_transcoder == TRANSCODER_EDP)
+		pipe_config->base.mode_changed = true;
+
+	ret = drm_atomic_commit(state);
+
+put_state:
+	if (ret == -EDEADLK) {
+		drm_atomic_state_clear(state);
+		drm_modeset_backoff(&ctx);
+		goto retry;
+	}
+
+	drm_atomic_state_put(state);
+unlock:
+	WARN(ret, "Toggling workaround to %i returns %i\n", enable, ret);
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+}
+
+static int ivb_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
+				enum pipe pipe,
+				enum intel_pipe_crc_source *source,
+				u32 *val)
+{
+	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO)
+		*source = INTEL_PIPE_CRC_SOURCE_PIPE;
+
+	switch (*source) {
+	case INTEL_PIPE_CRC_SOURCE_PLANE1:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PRIMARY_IVB;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE2:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_SPRITE_IVB;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PF_IVB;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int skl_pipe_crc_ctl_reg(struct drm_i915_private *dev_priv,
+				enum pipe pipe,
+				enum intel_pipe_crc_source *source,
+				u32 *val)
+{
+	if (*source == INTEL_PIPE_CRC_SOURCE_AUTO)
+		*source = INTEL_PIPE_CRC_SOURCE_PIPE;
+
+	switch (*source) {
+	case INTEL_PIPE_CRC_SOURCE_PLANE1:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_1_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE2:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_2_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE3:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_3_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE4:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_4_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE5:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_5_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE6:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_6_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PLANE7:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_PLANE_7_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+		*val = PIPE_CRC_ENABLE | PIPE_CRC_SOURCE_DMUX_SKL;
+		break;
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		*val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int get_new_crc_ctl_reg(struct drm_i915_private *dev_priv,
+			       enum pipe pipe,
+			       enum intel_pipe_crc_source *source, u32 *val)
+{
+	if (IS_GEN(dev_priv, 2))
+		return i8xx_pipe_crc_ctl_reg(source, val);
+	else if (INTEL_GEN(dev_priv) < 5)
+		return i9xx_pipe_crc_ctl_reg(dev_priv, pipe, source, val);
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		return vlv_pipe_crc_ctl_reg(dev_priv, pipe, source, val);
+	else if (IS_GEN_RANGE(dev_priv, 5, 6))
+		return ilk_pipe_crc_ctl_reg(source, val);
+	else if (INTEL_GEN(dev_priv) < 9)
+		return ivb_pipe_crc_ctl_reg(dev_priv, pipe, source, val);
+	else
+		return skl_pipe_crc_ctl_reg(dev_priv, pipe, source, val);
+}
+
+static int
+display_crc_ctl_parse_source(const char *buf, enum intel_pipe_crc_source *s)
+{
+	int i;
+
+	if (!buf) {
+		*s = INTEL_PIPE_CRC_SOURCE_NONE;
+		return 0;
+	}
+
+	i = match_string(pipe_crc_sources, ARRAY_SIZE(pipe_crc_sources), buf);
+	if (i < 0)
+		return i;
+
+	*s = i;
+	return 0;
+}
+
+void intel_display_crc_init(struct drm_i915_private *dev_priv)
+{
+	enum pipe pipe;
+
+	for_each_pipe(dev_priv, pipe) {
+		struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
+
+		spin_lock_init(&pipe_crc->lock);
+	}
+}
+
+static int i8xx_crc_source_valid(struct drm_i915_private *dev_priv,
+				 const enum intel_pipe_crc_source source)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int i9xx_crc_source_valid(struct drm_i915_private *dev_priv,
+				 const enum intel_pipe_crc_source source)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+	case INTEL_PIPE_CRC_SOURCE_TV:
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int vlv_crc_source_valid(struct drm_i915_private *dev_priv,
+				const enum intel_pipe_crc_source source)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+	case INTEL_PIPE_CRC_SOURCE_DP_B:
+	case INTEL_PIPE_CRC_SOURCE_DP_C:
+	case INTEL_PIPE_CRC_SOURCE_DP_D:
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ilk_crc_source_valid(struct drm_i915_private *dev_priv,
+				const enum intel_pipe_crc_source source)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+	case INTEL_PIPE_CRC_SOURCE_PLANE1:
+	case INTEL_PIPE_CRC_SOURCE_PLANE2:
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ivb_crc_source_valid(struct drm_i915_private *dev_priv,
+				const enum intel_pipe_crc_source source)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+	case INTEL_PIPE_CRC_SOURCE_PLANE1:
+	case INTEL_PIPE_CRC_SOURCE_PLANE2:
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int skl_crc_source_valid(struct drm_i915_private *dev_priv,
+				const enum intel_pipe_crc_source source)
+{
+	switch (source) {
+	case INTEL_PIPE_CRC_SOURCE_PIPE:
+	case INTEL_PIPE_CRC_SOURCE_PLANE1:
+	case INTEL_PIPE_CRC_SOURCE_PLANE2:
+	case INTEL_PIPE_CRC_SOURCE_PLANE3:
+	case INTEL_PIPE_CRC_SOURCE_PLANE4:
+	case INTEL_PIPE_CRC_SOURCE_PLANE5:
+	case INTEL_PIPE_CRC_SOURCE_PLANE6:
+	case INTEL_PIPE_CRC_SOURCE_PLANE7:
+	case INTEL_PIPE_CRC_SOURCE_NONE:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int
+intel_is_valid_crc_source(struct drm_i915_private *dev_priv,
+			  const enum intel_pipe_crc_source source)
+{
+	if (IS_GEN(dev_priv, 2))
+		return i8xx_crc_source_valid(dev_priv, source);
+	else if (INTEL_GEN(dev_priv) < 5)
+		return i9xx_crc_source_valid(dev_priv, source);
+	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+		return vlv_crc_source_valid(dev_priv, source);
+	else if (IS_GEN_RANGE(dev_priv, 5, 6))
+		return ilk_crc_source_valid(dev_priv, source);
+	else if (INTEL_GEN(dev_priv) < 9)
+		return ivb_crc_source_valid(dev_priv, source);
+	else
+		return skl_crc_source_valid(dev_priv, source);
+}
+
+const char *const *intel_crtc_get_crc_sources(struct drm_crtc *crtc,
+					      size_t *count)
+{
+	*count = ARRAY_SIZE(pipe_crc_sources);
+	return pipe_crc_sources;
+}
+
+int intel_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
+				 size_t *values_cnt)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	enum intel_pipe_crc_source source;
+
+	if (display_crc_ctl_parse_source(source_name, &source) < 0) {
+		DRM_DEBUG_DRIVER("unknown source %s\n", source_name);
+		return -EINVAL;
+	}
+
+	if (source == INTEL_PIPE_CRC_SOURCE_AUTO ||
+	    intel_is_valid_crc_source(dev_priv, source) == 0) {
+		*values_cnt = 5;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+int intel_crtc_set_crc_source(struct drm_crtc *crtc, const char *source_name)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[crtc->index];
+	enum intel_display_power_domain power_domain;
+	enum intel_pipe_crc_source source;
+	intel_wakeref_t wakeref;
+	u32 val = 0; /* shut up gcc */
+	int ret = 0;
+	bool enable;
+
+	if (display_crc_ctl_parse_source(source_name, &source) < 0) {
+		DRM_DEBUG_DRIVER("unknown source %s\n", source_name);
+		return -EINVAL;
+	}
+
+	power_domain = POWER_DOMAIN_PIPE(crtc->index);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref) {
+		DRM_DEBUG_KMS("Trying to capture CRC while pipe is off\n");
+		return -EIO;
+	}
+
+	enable = source != INTEL_PIPE_CRC_SOURCE_NONE;
+	if (enable)
+		intel_crtc_crc_setup_workarounds(to_intel_crtc(crtc), true);
+
+	ret = get_new_crc_ctl_reg(dev_priv, crtc->index, &source, &val);
+	if (ret != 0)
+		goto out;
+
+	pipe_crc->source = source;
+	I915_WRITE(PIPE_CRC_CTL(crtc->index), val);
+	POSTING_READ(PIPE_CRC_CTL(crtc->index));
+
+	if (!source) {
+		if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+			vlv_undo_pipe_scramble_reset(dev_priv, crtc->index);
+	}
+
+	pipe_crc->skipped = 0;
+
+out:
+	if (!enable)
+		intel_crtc_crc_setup_workarounds(to_intel_crtc(crtc), false);
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+void intel_crtc_enable_pipe_crc(struct intel_crtc *intel_crtc)
+{
+	struct drm_crtc *crtc = &intel_crtc->base;
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[crtc->index];
+	u32 val = 0;
+
+	if (!crtc->crc.opened)
+		return;
+
+	if (get_new_crc_ctl_reg(dev_priv, crtc->index, &pipe_crc->source, &val) < 0)
+		return;
+
+	/* Don't need pipe_crc->lock here, IRQs are not generated. */
+	pipe_crc->skipped = 0;
+
+	I915_WRITE(PIPE_CRC_CTL(crtc->index), val);
+	POSTING_READ(PIPE_CRC_CTL(crtc->index));
+}
+
+void intel_crtc_disable_pipe_crc(struct intel_crtc *intel_crtc)
+{
+	struct drm_crtc *crtc = &intel_crtc->base;
+	struct drm_i915_private *dev_priv = to_i915(crtc->dev);
+	struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[crtc->index];
+
+	/* Swallow crc's until we stop generating them. */
+	spin_lock_irq(&pipe_crc->lock);
+	pipe_crc->skipped = INT_MIN;
+	spin_unlock_irq(&pipe_crc->lock);
+
+	I915_WRITE(PIPE_CRC_CTL(crtc->index), 0);
+	POSTING_READ(PIPE_CRC_CTL(crtc->index));
+	synchronize_irq(dev_priv->drm.irq);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_pipe_crc.h b/drivers/gpu/drm/i915/display/intel_pipe_crc.h
new file mode 100644
index 000000000000..db258a756fc6
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pipe_crc.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_PIPE_CRC_H__
+#define __INTEL_PIPE_CRC_H__
+
+#include <linux/types.h>
+
+struct drm_crtc;
+struct drm_i915_private;
+struct intel_crtc;
+
+#ifdef CONFIG_DEBUG_FS
+void intel_display_crc_init(struct drm_i915_private *dev_priv);
+int intel_crtc_set_crc_source(struct drm_crtc *crtc, const char *source_name);
+int intel_crtc_verify_crc_source(struct drm_crtc *crtc,
+				 const char *source_name, size_t *values_cnt);
+const char *const *intel_crtc_get_crc_sources(struct drm_crtc *crtc,
+					      size_t *count);
+void intel_crtc_disable_pipe_crc(struct intel_crtc *crtc);
+void intel_crtc_enable_pipe_crc(struct intel_crtc *crtc);
+#else
+static inline void intel_display_crc_init(struct drm_i915_private *dev_priv) {}
+#define intel_crtc_set_crc_source NULL
+#define intel_crtc_verify_crc_source NULL
+#define intel_crtc_get_crc_sources NULL
+static inline void intel_crtc_disable_pipe_crc(struct intel_crtc *crtc)
+{
+}
+
+static inline void intel_crtc_enable_pipe_crc(struct intel_crtc *crtc)
+{
+}
+#endif
+
+#endif /* __INTEL_PIPE_CRC_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
new file mode 100644
index 000000000000..69709df4a648
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -0,0 +1,1303 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <drm/drm_atomic_helper.h>
+
+#include "display/intel_dp.h"
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+#include "intel_psr.h"
+#include "intel_sprite.h"
+
+/**
+ * DOC: Panel Self Refresh (PSR/SRD)
+ *
+ * Since Haswell Display controller supports Panel Self-Refresh on display
+ * panels witch have a remote frame buffer (RFB) implemented according to PSR
+ * spec in eDP1.3. PSR feature allows the display to go to lower standby states
+ * when system is idle but display is on as it eliminates display refresh
+ * request to DDR memory completely as long as the frame buffer for that
+ * display is unchanged.
+ *
+ * Panel Self Refresh must be supported by both Hardware (source) and
+ * Panel (sink).
+ *
+ * PSR saves power by caching the framebuffer in the panel RFB, which allows us
+ * to power down the link and memory controller. For DSI panels the same idea
+ * is called "manual mode".
+ *
+ * The implementation uses the hardware-based PSR support which automatically
+ * enters/exits self-refresh mode. The hardware takes care of sending the
+ * required DP aux message and could even retrain the link (that part isn't
+ * enabled yet though). The hardware also keeps track of any frontbuffer
+ * changes to know when to exit self-refresh mode again. Unfortunately that
+ * part doesn't work too well, hence why the i915 PSR support uses the
+ * software frontbuffer tracking to make sure it doesn't miss a screen
+ * update. For this integration intel_psr_invalidate() and intel_psr_flush()
+ * get called by the frontbuffer tracking code. Note that because of locking
+ * issues the self-refresh re-enable code is done from a work queue, which
+ * must be correctly synchronized/cancelled when shutting down the pipe."
+ */
+
+static bool psr_global_enabled(u32 debug)
+{
+	switch (debug & I915_PSR_DEBUG_MODE_MASK) {
+	case I915_PSR_DEBUG_DEFAULT:
+		return i915_modparams.enable_psr;
+	case I915_PSR_DEBUG_DISABLE:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool intel_psr2_enabled(struct drm_i915_private *dev_priv,
+			       const struct intel_crtc_state *crtc_state)
+{
+	/* Cannot enable DSC and PSR2 simultaneously */
+	WARN_ON(crtc_state->dsc_params.compression_enable &&
+		crtc_state->has_psr2);
+
+	switch (dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK) {
+	case I915_PSR_DEBUG_DISABLE:
+	case I915_PSR_DEBUG_FORCE_PSR1:
+		return false;
+	default:
+		return crtc_state->has_psr2;
+	}
+}
+
+static int edp_psr_shift(enum transcoder cpu_transcoder)
+{
+	switch (cpu_transcoder) {
+	case TRANSCODER_A:
+		return EDP_PSR_TRANSCODER_A_SHIFT;
+	case TRANSCODER_B:
+		return EDP_PSR_TRANSCODER_B_SHIFT;
+	case TRANSCODER_C:
+		return EDP_PSR_TRANSCODER_C_SHIFT;
+	default:
+		MISSING_CASE(cpu_transcoder);
+		/* fallthrough */
+	case TRANSCODER_EDP:
+		return EDP_PSR_TRANSCODER_EDP_SHIFT;
+	}
+}
+
+void intel_psr_irq_control(struct drm_i915_private *dev_priv, u32 debug)
+{
+	u32 debug_mask, mask;
+	enum transcoder cpu_transcoder;
+	u32 transcoders = BIT(TRANSCODER_EDP);
+
+	if (INTEL_GEN(dev_priv) >= 8)
+		transcoders |= BIT(TRANSCODER_A) |
+			       BIT(TRANSCODER_B) |
+			       BIT(TRANSCODER_C);
+
+	debug_mask = 0;
+	mask = 0;
+	for_each_cpu_transcoder_masked(dev_priv, cpu_transcoder, transcoders) {
+		int shift = edp_psr_shift(cpu_transcoder);
+
+		mask |= EDP_PSR_ERROR(shift);
+		debug_mask |= EDP_PSR_POST_EXIT(shift) |
+			      EDP_PSR_PRE_ENTRY(shift);
+	}
+
+	if (debug & I915_PSR_DEBUG_IRQ)
+		mask |= debug_mask;
+
+	I915_WRITE(EDP_PSR_IMR, ~mask);
+}
+
+static void psr_event_print(u32 val, bool psr2_enabled)
+{
+	DRM_DEBUG_KMS("PSR exit events: 0x%x\n", val);
+	if (val & PSR_EVENT_PSR2_WD_TIMER_EXPIRE)
+		DRM_DEBUG_KMS("\tPSR2 watchdog timer expired\n");
+	if ((val & PSR_EVENT_PSR2_DISABLED) && psr2_enabled)
+		DRM_DEBUG_KMS("\tPSR2 disabled\n");
+	if (val & PSR_EVENT_SU_DIRTY_FIFO_UNDERRUN)
+		DRM_DEBUG_KMS("\tSU dirty FIFO underrun\n");
+	if (val & PSR_EVENT_SU_CRC_FIFO_UNDERRUN)
+		DRM_DEBUG_KMS("\tSU CRC FIFO underrun\n");
+	if (val & PSR_EVENT_GRAPHICS_RESET)
+		DRM_DEBUG_KMS("\tGraphics reset\n");
+	if (val & PSR_EVENT_PCH_INTERRUPT)
+		DRM_DEBUG_KMS("\tPCH interrupt\n");
+	if (val & PSR_EVENT_MEMORY_UP)
+		DRM_DEBUG_KMS("\tMemory up\n");
+	if (val & PSR_EVENT_FRONT_BUFFER_MODIFY)
+		DRM_DEBUG_KMS("\tFront buffer modification\n");
+	if (val & PSR_EVENT_WD_TIMER_EXPIRE)
+		DRM_DEBUG_KMS("\tPSR watchdog timer expired\n");
+	if (val & PSR_EVENT_PIPE_REGISTERS_UPDATE)
+		DRM_DEBUG_KMS("\tPIPE registers updated\n");
+	if (val & PSR_EVENT_REGISTER_UPDATE)
+		DRM_DEBUG_KMS("\tRegister updated\n");
+	if (val & PSR_EVENT_HDCP_ENABLE)
+		DRM_DEBUG_KMS("\tHDCP enabled\n");
+	if (val & PSR_EVENT_KVMR_SESSION_ENABLE)
+		DRM_DEBUG_KMS("\tKVMR session enabled\n");
+	if (val & PSR_EVENT_VBI_ENABLE)
+		DRM_DEBUG_KMS("\tVBI enabled\n");
+	if (val & PSR_EVENT_LPSP_MODE_EXIT)
+		DRM_DEBUG_KMS("\tLPSP mode exited\n");
+	if ((val & PSR_EVENT_PSR_DISABLE) && !psr2_enabled)
+		DRM_DEBUG_KMS("\tPSR disabled\n");
+}
+
+void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir)
+{
+	u32 transcoders = BIT(TRANSCODER_EDP);
+	enum transcoder cpu_transcoder;
+	ktime_t time_ns =  ktime_get();
+	u32 mask = 0;
+
+	if (INTEL_GEN(dev_priv) >= 8)
+		transcoders |= BIT(TRANSCODER_A) |
+			       BIT(TRANSCODER_B) |
+			       BIT(TRANSCODER_C);
+
+	for_each_cpu_transcoder_masked(dev_priv, cpu_transcoder, transcoders) {
+		int shift = edp_psr_shift(cpu_transcoder);
+
+		if (psr_iir & EDP_PSR_ERROR(shift)) {
+			DRM_WARN("[transcoder %s] PSR aux error\n",
+				 transcoder_name(cpu_transcoder));
+
+			dev_priv->psr.irq_aux_error = true;
+
+			/*
+			 * If this interruption is not masked it will keep
+			 * interrupting so fast that it prevents the scheduled
+			 * work to run.
+			 * Also after a PSR error, we don't want to arm PSR
+			 * again so we don't care about unmask the interruption
+			 * or unset irq_aux_error.
+			 */
+			mask |= EDP_PSR_ERROR(shift);
+		}
+
+		if (psr_iir & EDP_PSR_PRE_ENTRY(shift)) {
+			dev_priv->psr.last_entry_attempt = time_ns;
+			DRM_DEBUG_KMS("[transcoder %s] PSR entry attempt in 2 vblanks\n",
+				      transcoder_name(cpu_transcoder));
+		}
+
+		if (psr_iir & EDP_PSR_POST_EXIT(shift)) {
+			dev_priv->psr.last_exit = time_ns;
+			DRM_DEBUG_KMS("[transcoder %s] PSR exit completed\n",
+				      transcoder_name(cpu_transcoder));
+
+			if (INTEL_GEN(dev_priv) >= 9) {
+				u32 val = I915_READ(PSR_EVENT(cpu_transcoder));
+				bool psr2_enabled = dev_priv->psr.psr2_enabled;
+
+				I915_WRITE(PSR_EVENT(cpu_transcoder), val);
+				psr_event_print(val, psr2_enabled);
+			}
+		}
+	}
+
+	if (mask) {
+		mask |= I915_READ(EDP_PSR_IMR);
+		I915_WRITE(EDP_PSR_IMR, mask);
+
+		schedule_work(&dev_priv->psr.work);
+	}
+}
+
+static bool intel_dp_get_alpm_status(struct intel_dp *intel_dp)
+{
+	u8 alpm_caps = 0;
+
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP,
+			      &alpm_caps) != 1)
+		return false;
+	return alpm_caps & DP_ALPM_CAP;
+}
+
+static u8 intel_dp_get_sink_sync_latency(struct intel_dp *intel_dp)
+{
+	u8 val = 8; /* assume the worst if we can't read the value */
+
+	if (drm_dp_dpcd_readb(&intel_dp->aux,
+			      DP_SYNCHRONIZATION_LATENCY_IN_SINK, &val) == 1)
+		val &= DP_MAX_RESYNC_FRAME_COUNT_MASK;
+	else
+		DRM_DEBUG_KMS("Unable to get sink synchronization latency, assuming 8 frames\n");
+	return val;
+}
+
+static u16 intel_dp_get_su_x_granulartiy(struct intel_dp *intel_dp)
+{
+	u16 val;
+	ssize_t r;
+
+	/*
+	 * Returning the default X granularity if granularity not required or
+	 * if DPCD read fails
+	 */
+	if (!(intel_dp->psr_dpcd[1] & DP_PSR2_SU_GRANULARITY_REQUIRED))
+		return 4;
+
+	r = drm_dp_dpcd_read(&intel_dp->aux, DP_PSR2_SU_X_GRANULARITY, &val, 2);
+	if (r != 2)
+		DRM_DEBUG_KMS("Unable to read DP_PSR2_SU_X_GRANULARITY\n");
+
+	/*
+	 * Spec says that if the value read is 0 the default granularity should
+	 * be used instead.
+	 */
+	if (r != 2 || val == 0)
+		val = 4;
+
+	return val;
+}
+
+void intel_psr_init_dpcd(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
+
+	drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd,
+			 sizeof(intel_dp->psr_dpcd));
+
+	if (!intel_dp->psr_dpcd[0])
+		return;
+	DRM_DEBUG_KMS("eDP panel supports PSR version %x\n",
+		      intel_dp->psr_dpcd[0]);
+
+	if (drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_NO_PSR)) {
+		DRM_DEBUG_KMS("PSR support not currently available for this panel\n");
+		return;
+	}
+
+	if (!(intel_dp->edp_dpcd[1] & DP_EDP_SET_POWER_CAP)) {
+		DRM_DEBUG_KMS("Panel lacks power state control, PSR cannot be enabled\n");
+		return;
+	}
+
+	dev_priv->psr.sink_support = true;
+	dev_priv->psr.sink_sync_latency =
+		intel_dp_get_sink_sync_latency(intel_dp);
+
+	WARN_ON(dev_priv->psr.dp);
+	dev_priv->psr.dp = intel_dp;
+
+	if (INTEL_GEN(dev_priv) >= 9 &&
+	    (intel_dp->psr_dpcd[0] == DP_PSR2_WITH_Y_COORD_IS_SUPPORTED)) {
+		bool y_req = intel_dp->psr_dpcd[1] &
+			     DP_PSR2_SU_Y_COORDINATE_REQUIRED;
+		bool alpm = intel_dp_get_alpm_status(intel_dp);
+
+		/*
+		 * All panels that supports PSR version 03h (PSR2 +
+		 * Y-coordinate) can handle Y-coordinates in VSC but we are
+		 * only sure that it is going to be used when required by the
+		 * panel. This way panel is capable to do selective update
+		 * without a aux frame sync.
+		 *
+		 * To support PSR version 02h and PSR version 03h without
+		 * Y-coordinate requirement panels we would need to enable
+		 * GTC first.
+		 */
+		dev_priv->psr.sink_psr2_support = y_req && alpm;
+		DRM_DEBUG_KMS("PSR2 %ssupported\n",
+			      dev_priv->psr.sink_psr2_support ? "" : "not ");
+
+		if (dev_priv->psr.sink_psr2_support) {
+			dev_priv->psr.colorimetry_support =
+				intel_dp_get_colorimetry_status(intel_dp);
+			dev_priv->psr.su_x_granularity =
+				intel_dp_get_su_x_granulartiy(intel_dp);
+		}
+	}
+}
+
+static void intel_psr_setup_vsc(struct intel_dp *intel_dp,
+				const struct intel_crtc_state *crtc_state)
+{
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct dp_sdp psr_vsc;
+
+	if (dev_priv->psr.psr2_enabled) {
+		/* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */
+		memset(&psr_vsc, 0, sizeof(psr_vsc));
+		psr_vsc.sdp_header.HB0 = 0;
+		psr_vsc.sdp_header.HB1 = 0x7;
+		if (dev_priv->psr.colorimetry_support) {
+			psr_vsc.sdp_header.HB2 = 0x5;
+			psr_vsc.sdp_header.HB3 = 0x13;
+		} else {
+			psr_vsc.sdp_header.HB2 = 0x4;
+			psr_vsc.sdp_header.HB3 = 0xe;
+		}
+	} else {
+		/* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */
+		memset(&psr_vsc, 0, sizeof(psr_vsc));
+		psr_vsc.sdp_header.HB0 = 0;
+		psr_vsc.sdp_header.HB1 = 0x7;
+		psr_vsc.sdp_header.HB2 = 0x2;
+		psr_vsc.sdp_header.HB3 = 0x8;
+	}
+
+	intel_dig_port->write_infoframe(&intel_dig_port->base,
+					crtc_state,
+					DP_SDP_VSC, &psr_vsc, sizeof(psr_vsc));
+}
+
+static void hsw_psr_setup_aux(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 aux_clock_divider, aux_ctl;
+	int i;
+	static const u8 aux_msg[] = {
+		[0] = DP_AUX_NATIVE_WRITE << 4,
+		[1] = DP_SET_POWER >> 8,
+		[2] = DP_SET_POWER & 0xff,
+		[3] = 1 - 1,
+		[4] = DP_SET_POWER_D0,
+	};
+	u32 psr_aux_mask = EDP_PSR_AUX_CTL_TIME_OUT_MASK |
+			   EDP_PSR_AUX_CTL_MESSAGE_SIZE_MASK |
+			   EDP_PSR_AUX_CTL_PRECHARGE_2US_MASK |
+			   EDP_PSR_AUX_CTL_BIT_CLOCK_2X_MASK;
+
+	BUILD_BUG_ON(sizeof(aux_msg) > 20);
+	for (i = 0; i < sizeof(aux_msg); i += 4)
+		I915_WRITE(EDP_PSR_AUX_DATA(i >> 2),
+			   intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i));
+
+	aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0);
+
+	/* Start with bits set for DDI_AUX_CTL register */
+	aux_ctl = intel_dp->get_aux_send_ctl(intel_dp, sizeof(aux_msg),
+					     aux_clock_divider);
+
+	/* Select only valid bits for SRD_AUX_CTL */
+	aux_ctl &= psr_aux_mask;
+	I915_WRITE(EDP_PSR_AUX_CTL, aux_ctl);
+}
+
+static void intel_psr_enable_sink(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u8 dpcd_val = DP_PSR_ENABLE;
+
+	/* Enable ALPM at sink for psr2 */
+	if (dev_priv->psr.psr2_enabled) {
+		drm_dp_dpcd_writeb(&intel_dp->aux, DP_RECEIVER_ALPM_CONFIG,
+				   DP_ALPM_ENABLE);
+		dpcd_val |= DP_PSR_ENABLE_PSR2 | DP_PSR_IRQ_HPD_WITH_CRC_ERRORS;
+	} else {
+		if (dev_priv->psr.link_standby)
+			dpcd_val |= DP_PSR_MAIN_LINK_ACTIVE;
+
+		if (INTEL_GEN(dev_priv) >= 8)
+			dpcd_val |= DP_PSR_CRC_VERIFICATION;
+	}
+
+	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, dpcd_val);
+
+	drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+}
+
+static u32 intel_psr1_get_tp_time(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 val = 0;
+
+	if (INTEL_GEN(dev_priv) >= 11)
+		val |= EDP_PSR_TP4_TIME_0US;
+
+	if (dev_priv->vbt.psr.tp1_wakeup_time_us == 0)
+		val |= EDP_PSR_TP1_TIME_0us;
+	else if (dev_priv->vbt.psr.tp1_wakeup_time_us <= 100)
+		val |= EDP_PSR_TP1_TIME_100us;
+	else if (dev_priv->vbt.psr.tp1_wakeup_time_us <= 500)
+		val |= EDP_PSR_TP1_TIME_500us;
+	else
+		val |= EDP_PSR_TP1_TIME_2500us;
+
+	if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us == 0)
+		val |= EDP_PSR_TP2_TP3_TIME_0us;
+	else if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 100)
+		val |= EDP_PSR_TP2_TP3_TIME_100us;
+	else if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 500)
+		val |= EDP_PSR_TP2_TP3_TIME_500us;
+	else
+		val |= EDP_PSR_TP2_TP3_TIME_2500us;
+
+	if (intel_dp_source_supports_hbr2(intel_dp) &&
+	    drm_dp_tps3_supported(intel_dp->dpcd))
+		val |= EDP_PSR_TP1_TP3_SEL;
+	else
+		val |= EDP_PSR_TP1_TP2_SEL;
+
+	return val;
+}
+
+static void hsw_activate_psr1(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 max_sleep_time = 0x1f;
+	u32 val = EDP_PSR_ENABLE;
+
+	/* Let's use 6 as the minimum to cover all known cases including the
+	 * off-by-one issue that HW has in some cases.
+	 */
+	int idle_frames = max(6, dev_priv->vbt.psr.idle_frames);
+
+	/* sink_sync_latency of 8 means source has to wait for more than 8
+	 * frames, we'll go with 9 frames for now
+	 */
+	idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency + 1);
+	val |= idle_frames << EDP_PSR_IDLE_FRAME_SHIFT;
+
+	val |= max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT;
+	if (IS_HASWELL(dev_priv))
+		val |= EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES;
+
+	if (dev_priv->psr.link_standby)
+		val |= EDP_PSR_LINK_STANDBY;
+
+	val |= intel_psr1_get_tp_time(intel_dp);
+
+	if (INTEL_GEN(dev_priv) >= 8)
+		val |= EDP_PSR_CRC_ENABLE;
+
+	val |= I915_READ(EDP_PSR_CTL) & EDP_PSR_RESTORE_PSR_ACTIVE_CTX_MASK;
+	I915_WRITE(EDP_PSR_CTL, val);
+}
+
+static void hsw_activate_psr2(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	u32 val;
+
+	/* Let's use 6 as the minimum to cover all known cases including the
+	 * off-by-one issue that HW has in some cases.
+	 */
+	int idle_frames = max(6, dev_priv->vbt.psr.idle_frames);
+
+	idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency + 1);
+	val = idle_frames << EDP_PSR2_IDLE_FRAME_SHIFT;
+
+	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		val |= EDP_Y_COORDINATE_ENABLE;
+
+	val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency + 1);
+
+	if (dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us >= 0 &&
+	    dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us <= 50)
+		val |= EDP_PSR2_TP2_TIME_50us;
+	else if (dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us <= 100)
+		val |= EDP_PSR2_TP2_TIME_100us;
+	else if (dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us <= 500)
+		val |= EDP_PSR2_TP2_TIME_500us;
+	else
+		val |= EDP_PSR2_TP2_TIME_2500us;
+
+	/*
+	 * PSR2 HW is incorrectly using EDP_PSR_TP1_TP3_SEL and BSpec is
+	 * recommending keep this bit unset while PSR2 is enabled.
+	 */
+	I915_WRITE(EDP_PSR_CTL, 0);
+
+	I915_WRITE(EDP_PSR2_CTL, val);
+}
+
+static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
+				    struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	int crtc_hdisplay = crtc_state->base.adjusted_mode.crtc_hdisplay;
+	int crtc_vdisplay = crtc_state->base.adjusted_mode.crtc_vdisplay;
+	int psr_max_h = 0, psr_max_v = 0;
+
+	if (!dev_priv->psr.sink_psr2_support)
+		return false;
+
+	/*
+	 * DSC and PSR2 cannot be enabled simultaneously. If a requested
+	 * resolution requires DSC to be enabled, priority is given to DSC
+	 * over PSR2.
+	 */
+	if (crtc_state->dsc_params.compression_enable) {
+		DRM_DEBUG_KMS("PSR2 cannot be enabled since DSC is enabled\n");
+		return false;
+	}
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+		psr_max_h = 4096;
+		psr_max_v = 2304;
+	} else if (IS_GEN(dev_priv, 9)) {
+		psr_max_h = 3640;
+		psr_max_v = 2304;
+	}
+
+	if (crtc_hdisplay > psr_max_h || crtc_vdisplay > psr_max_v) {
+		DRM_DEBUG_KMS("PSR2 not enabled, resolution %dx%d > max supported %dx%d\n",
+			      crtc_hdisplay, crtc_vdisplay,
+			      psr_max_h, psr_max_v);
+		return false;
+	}
+
+	/*
+	 * HW sends SU blocks of size four scan lines, which means the starting
+	 * X coordinate and Y granularity requirements will always be met. We
+	 * only need to validate the SU block width is a multiple of
+	 * x granularity.
+	 */
+	if (crtc_hdisplay % dev_priv->psr.su_x_granularity) {
+		DRM_DEBUG_KMS("PSR2 not enabled, hdisplay(%d) not multiple of %d\n",
+			      crtc_hdisplay, dev_priv->psr.su_x_granularity);
+		return false;
+	}
+
+	if (crtc_state->crc_enabled) {
+		DRM_DEBUG_KMS("PSR2 not enabled because it would inhibit pipe CRC calculation\n");
+		return false;
+	}
+
+	return true;
+}
+
+void intel_psr_compute_config(struct intel_dp *intel_dp,
+			      struct intel_crtc_state *crtc_state)
+{
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+	int psr_setup_time;
+
+	if (!CAN_PSR(dev_priv))
+		return;
+
+	if (intel_dp != dev_priv->psr.dp)
+		return;
+
+	/*
+	 * HSW spec explicitly says PSR is tied to port A.
+	 * BDW+ platforms with DDI implementation of PSR have different
+	 * PSR registers per transcoder and we only implement transcoder EDP
+	 * ones. Since by Display design transcoder EDP is tied to port A
+	 * we can safely escape based on the port A.
+	 */
+	if (dig_port->base.port != PORT_A) {
+		DRM_DEBUG_KMS("PSR condition failed: Port not supported\n");
+		return;
+	}
+
+	if (dev_priv->psr.sink_not_reliable) {
+		DRM_DEBUG_KMS("PSR sink implementation is not reliable\n");
+		return;
+	}
+
+	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+		DRM_DEBUG_KMS("PSR condition failed: Interlaced mode enabled\n");
+		return;
+	}
+
+	psr_setup_time = drm_dp_psr_setup_time(intel_dp->psr_dpcd);
+	if (psr_setup_time < 0) {
+		DRM_DEBUG_KMS("PSR condition failed: Invalid PSR setup time (0x%02x)\n",
+			      intel_dp->psr_dpcd[1]);
+		return;
+	}
+
+	if (intel_usecs_to_scanlines(adjusted_mode, psr_setup_time) >
+	    adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vdisplay - 1) {
+		DRM_DEBUG_KMS("PSR condition failed: PSR setup time (%d us) too long\n",
+			      psr_setup_time);
+		return;
+	}
+
+	crtc_state->has_psr = true;
+	crtc_state->has_psr2 = intel_psr2_config_valid(intel_dp, crtc_state);
+}
+
+static void intel_psr_activate(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		WARN_ON(I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE);
+	WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE);
+	WARN_ON(dev_priv->psr.active);
+	lockdep_assert_held(&dev_priv->psr.lock);
+
+	/* psr1 and psr2 are mutually exclusive.*/
+	if (dev_priv->psr.psr2_enabled)
+		hsw_activate_psr2(intel_dp);
+	else
+		hsw_activate_psr1(intel_dp);
+
+	dev_priv->psr.active = true;
+}
+
+static i915_reg_t gen9_chicken_trans_reg(struct drm_i915_private *dev_priv,
+					 enum transcoder cpu_transcoder)
+{
+	static const i915_reg_t regs[] = {
+		[TRANSCODER_A] = CHICKEN_TRANS_A,
+		[TRANSCODER_B] = CHICKEN_TRANS_B,
+		[TRANSCODER_C] = CHICKEN_TRANS_C,
+		[TRANSCODER_EDP] = CHICKEN_TRANS_EDP,
+	};
+
+	WARN_ON(INTEL_GEN(dev_priv) < 9);
+
+	if (WARN_ON(cpu_transcoder >= ARRAY_SIZE(regs) ||
+		    !regs[cpu_transcoder].reg))
+		cpu_transcoder = TRANSCODER_A;
+
+	return regs[cpu_transcoder];
+}
+
+static void intel_psr_enable_source(struct intel_dp *intel_dp,
+				    const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 mask;
+
+	/* Only HSW and BDW have PSR AUX registers that need to be setup. SKL+
+	 * use hardcoded values PSR AUX transactions
+	 */
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		hsw_psr_setup_aux(intel_dp);
+
+	if (dev_priv->psr.psr2_enabled && (IS_GEN(dev_priv, 9) &&
+					   !IS_GEMINILAKE(dev_priv))) {
+		i915_reg_t reg = gen9_chicken_trans_reg(dev_priv,
+							cpu_transcoder);
+		u32 chicken = I915_READ(reg);
+
+		chicken |= PSR2_VSC_ENABLE_PROG_HEADER |
+			   PSR2_ADD_VERTICAL_LINE_COUNT;
+		I915_WRITE(reg, chicken);
+	}
+
+	/*
+	 * Per Spec: Avoid continuous PSR exit by masking MEMUP and HPD also
+	 * mask LPSP to avoid dependency on other drivers that might block
+	 * runtime_pm besides preventing  other hw tracking issues now we
+	 * can rely on frontbuffer tracking.
+	 */
+	mask = EDP_PSR_DEBUG_MASK_MEMUP |
+	       EDP_PSR_DEBUG_MASK_HPD |
+	       EDP_PSR_DEBUG_MASK_LPSP |
+	       EDP_PSR_DEBUG_MASK_MAX_SLEEP;
+
+	if (INTEL_GEN(dev_priv) < 11)
+		mask |= EDP_PSR_DEBUG_MASK_DISP_REG_WRITE;
+
+	I915_WRITE(EDP_PSR_DEBUG, mask);
+}
+
+static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
+				    const struct intel_crtc_state *crtc_state)
+{
+	struct intel_dp *intel_dp = dev_priv->psr.dp;
+
+	WARN_ON(dev_priv->psr.enabled);
+
+	dev_priv->psr.psr2_enabled = intel_psr2_enabled(dev_priv, crtc_state);
+	dev_priv->psr.busy_frontbuffer_bits = 0;
+	dev_priv->psr.pipe = to_intel_crtc(crtc_state->base.crtc)->pipe;
+
+	DRM_DEBUG_KMS("Enabling PSR%s\n",
+		      dev_priv->psr.psr2_enabled ? "2" : "1");
+	intel_psr_setup_vsc(intel_dp, crtc_state);
+	intel_psr_enable_sink(intel_dp);
+	intel_psr_enable_source(intel_dp, crtc_state);
+	dev_priv->psr.enabled = true;
+
+	intel_psr_activate(intel_dp);
+}
+
+/**
+ * intel_psr_enable - Enable PSR
+ * @intel_dp: Intel DP
+ * @crtc_state: new CRTC state
+ *
+ * This function can only be called after the pipe is fully trained and enabled.
+ */
+void intel_psr_enable(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (!crtc_state->has_psr)
+		return;
+
+	if (WARN_ON(!CAN_PSR(dev_priv)))
+		return;
+
+	WARN_ON(dev_priv->drrs.dp);
+
+	mutex_lock(&dev_priv->psr.lock);
+
+	if (!psr_global_enabled(dev_priv->psr.debug)) {
+		DRM_DEBUG_KMS("PSR disabled by flag\n");
+		goto unlock;
+	}
+
+	intel_psr_enable_locked(dev_priv, crtc_state);
+
+unlock:
+	mutex_unlock(&dev_priv->psr.lock);
+}
+
+static void intel_psr_exit(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	if (!dev_priv->psr.active) {
+		if (INTEL_GEN(dev_priv) >= 9)
+			WARN_ON(I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE);
+		WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE);
+		return;
+	}
+
+	if (dev_priv->psr.psr2_enabled) {
+		val = I915_READ(EDP_PSR2_CTL);
+		WARN_ON(!(val & EDP_PSR2_ENABLE));
+		I915_WRITE(EDP_PSR2_CTL, val & ~EDP_PSR2_ENABLE);
+	} else {
+		val = I915_READ(EDP_PSR_CTL);
+		WARN_ON(!(val & EDP_PSR_ENABLE));
+		I915_WRITE(EDP_PSR_CTL, val & ~EDP_PSR_ENABLE);
+	}
+	dev_priv->psr.active = false;
+}
+
+static void intel_psr_disable_locked(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	i915_reg_t psr_status;
+	u32 psr_status_mask;
+
+	lockdep_assert_held(&dev_priv->psr.lock);
+
+	if (!dev_priv->psr.enabled)
+		return;
+
+	DRM_DEBUG_KMS("Disabling PSR%s\n",
+		      dev_priv->psr.psr2_enabled ? "2" : "1");
+
+	intel_psr_exit(dev_priv);
+
+	if (dev_priv->psr.psr2_enabled) {
+		psr_status = EDP_PSR2_STATUS;
+		psr_status_mask = EDP_PSR2_STATUS_STATE_MASK;
+	} else {
+		psr_status = EDP_PSR_STATUS;
+		psr_status_mask = EDP_PSR_STATUS_STATE_MASK;
+	}
+
+	/* Wait till PSR is idle */
+	if (intel_wait_for_register(&dev_priv->uncore,
+				    psr_status, psr_status_mask, 0, 2000))
+		DRM_ERROR("Timed out waiting PSR idle state\n");
+
+	/* Disable PSR on Sink */
+	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, 0);
+
+	dev_priv->psr.enabled = false;
+}
+
+/**
+ * intel_psr_disable - Disable PSR
+ * @intel_dp: Intel DP
+ * @old_crtc_state: old CRTC state
+ *
+ * This function needs to be called before disabling pipe.
+ */
+void intel_psr_disable(struct intel_dp *intel_dp,
+		       const struct intel_crtc_state *old_crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (!old_crtc_state->has_psr)
+		return;
+
+	if (WARN_ON(!CAN_PSR(dev_priv)))
+		return;
+
+	mutex_lock(&dev_priv->psr.lock);
+
+	intel_psr_disable_locked(intel_dp);
+
+	mutex_unlock(&dev_priv->psr.lock);
+	cancel_work_sync(&dev_priv->psr.work);
+}
+
+static void psr_force_hw_tracking_exit(struct drm_i915_private *dev_priv)
+{
+	/*
+	 * Display WA #0884: all
+	 * This documented WA for bxt can be safely applied
+	 * broadly so we can force HW tracking to exit PSR
+	 * instead of disabling and re-enabling.
+	 * Workaround tells us to write 0 to CUR_SURFLIVE_A,
+	 * but it makes more sense write to the current active
+	 * pipe.
+	 */
+	I915_WRITE(CURSURFLIVE(dev_priv->psr.pipe), 0);
+}
+
+/**
+ * intel_psr_update - Update PSR state
+ * @intel_dp: Intel DP
+ * @crtc_state: new CRTC state
+ *
+ * This functions will update PSR states, disabling, enabling or switching PSR
+ * version when executing fastsets. For full modeset, intel_psr_disable() and
+ * intel_psr_enable() should be called instead.
+ */
+void intel_psr_update(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct i915_psr *psr = &dev_priv->psr;
+	bool enable, psr2_enable;
+
+	if (!CAN_PSR(dev_priv) || READ_ONCE(psr->dp) != intel_dp)
+		return;
+
+	mutex_lock(&dev_priv->psr.lock);
+
+	enable = crtc_state->has_psr && psr_global_enabled(psr->debug);
+	psr2_enable = intel_psr2_enabled(dev_priv, crtc_state);
+
+	if (enable == psr->enabled && psr2_enable == psr->psr2_enabled) {
+		/* Force a PSR exit when enabling CRC to avoid CRC timeouts */
+		if (crtc_state->crc_enabled && psr->enabled)
+			psr_force_hw_tracking_exit(dev_priv);
+
+		goto unlock;
+	}
+
+	if (psr->enabled)
+		intel_psr_disable_locked(intel_dp);
+
+	if (enable)
+		intel_psr_enable_locked(dev_priv, crtc_state);
+
+unlock:
+	mutex_unlock(&dev_priv->psr.lock);
+}
+
+/**
+ * intel_psr_wait_for_idle - wait for PSR1 to idle
+ * @new_crtc_state: new CRTC state
+ * @out_value: PSR status in case of failure
+ *
+ * This function is expected to be called from pipe_update_start() where it is
+ * not expected to race with PSR enable or disable.
+ *
+ * Returns: 0 on success or -ETIMEOUT if PSR status does not idle.
+ */
+int intel_psr_wait_for_idle(const struct intel_crtc_state *new_crtc_state,
+			    u32 *out_value)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (!dev_priv->psr.enabled || !new_crtc_state->has_psr)
+		return 0;
+
+	/* FIXME: Update this for PSR2 if we need to wait for idle */
+	if (READ_ONCE(dev_priv->psr.psr2_enabled))
+		return 0;
+
+	/*
+	 * From bspec: Panel Self Refresh (BDW+)
+	 * Max. time for PSR to idle = Inverse of the refresh rate + 6 ms of
+	 * exit training time + 1.5 ms of aux channel handshake. 50 ms is
+	 * defensive enough to cover everything.
+	 */
+
+	return __intel_wait_for_register(&dev_priv->uncore, EDP_PSR_STATUS,
+					 EDP_PSR_STATUS_STATE_MASK,
+					 EDP_PSR_STATUS_STATE_IDLE, 2, 50,
+					 out_value);
+}
+
+static bool __psr_wait_for_idle_locked(struct drm_i915_private *dev_priv)
+{
+	i915_reg_t reg;
+	u32 mask;
+	int err;
+
+	if (!dev_priv->psr.enabled)
+		return false;
+
+	if (dev_priv->psr.psr2_enabled) {
+		reg = EDP_PSR2_STATUS;
+		mask = EDP_PSR2_STATUS_STATE_MASK;
+	} else {
+		reg = EDP_PSR_STATUS;
+		mask = EDP_PSR_STATUS_STATE_MASK;
+	}
+
+	mutex_unlock(&dev_priv->psr.lock);
+
+	err = intel_wait_for_register(&dev_priv->uncore, reg, mask, 0, 50);
+	if (err)
+		DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n");
+
+	/* After the unlocked wait, verify that PSR is still wanted! */
+	mutex_lock(&dev_priv->psr.lock);
+	return err == 0 && dev_priv->psr.enabled;
+}
+
+static int intel_psr_fastset_force(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
+	struct drm_atomic_state *state;
+	struct drm_crtc *crtc;
+	int err;
+
+	state = drm_atomic_state_alloc(dev);
+	if (!state)
+		return -ENOMEM;
+
+	drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
+	state->acquire_ctx = &ctx;
+
+retry:
+	drm_for_each_crtc(crtc, dev) {
+		struct drm_crtc_state *crtc_state;
+		struct intel_crtc_state *intel_crtc_state;
+
+		crtc_state = drm_atomic_get_crtc_state(state, crtc);
+		if (IS_ERR(crtc_state)) {
+			err = PTR_ERR(crtc_state);
+			goto error;
+		}
+
+		intel_crtc_state = to_intel_crtc_state(crtc_state);
+
+		if (crtc_state->active && intel_crtc_state->has_psr) {
+			/* Mark mode as changed to trigger a pipe->update() */
+			crtc_state->mode_changed = true;
+			break;
+		}
+	}
+
+	err = drm_atomic_commit(state);
+
+error:
+	if (err == -EDEADLK) {
+		drm_atomic_state_clear(state);
+		err = drm_modeset_backoff(&ctx);
+		if (!err)
+			goto retry;
+	}
+
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+	drm_atomic_state_put(state);
+
+	return err;
+}
+
+int intel_psr_debug_set(struct drm_i915_private *dev_priv, u64 val)
+{
+	const u32 mode = val & I915_PSR_DEBUG_MODE_MASK;
+	u32 old_mode;
+	int ret;
+
+	if (val & ~(I915_PSR_DEBUG_IRQ | I915_PSR_DEBUG_MODE_MASK) ||
+	    mode > I915_PSR_DEBUG_FORCE_PSR1) {
+		DRM_DEBUG_KMS("Invalid debug mask %llx\n", val);
+		return -EINVAL;
+	}
+
+	ret = mutex_lock_interruptible(&dev_priv->psr.lock);
+	if (ret)
+		return ret;
+
+	old_mode = dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK;
+	dev_priv->psr.debug = val;
+	intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
+
+	mutex_unlock(&dev_priv->psr.lock);
+
+	if (old_mode != mode)
+		ret = intel_psr_fastset_force(dev_priv);
+
+	return ret;
+}
+
+static void intel_psr_handle_irq(struct drm_i915_private *dev_priv)
+{
+	struct i915_psr *psr = &dev_priv->psr;
+
+	intel_psr_disable_locked(psr->dp);
+	psr->sink_not_reliable = true;
+	/* let's make sure that sink is awaken */
+	drm_dp_dpcd_writeb(&psr->dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+}
+
+static void intel_psr_work(struct work_struct *work)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(work, typeof(*dev_priv), psr.work);
+
+	mutex_lock(&dev_priv->psr.lock);
+
+	if (!dev_priv->psr.enabled)
+		goto unlock;
+
+	if (READ_ONCE(dev_priv->psr.irq_aux_error))
+		intel_psr_handle_irq(dev_priv);
+
+	/*
+	 * We have to make sure PSR is ready for re-enable
+	 * otherwise it keeps disabled until next full enable/disable cycle.
+	 * PSR might take some time to get fully disabled
+	 * and be ready for re-enable.
+	 */
+	if (!__psr_wait_for_idle_locked(dev_priv))
+		goto unlock;
+
+	/*
+	 * The delayed work can race with an invalidate hence we need to
+	 * recheck. Since psr_flush first clears this and then reschedules we
+	 * won't ever miss a flush when bailing out here.
+	 */
+	if (dev_priv->psr.busy_frontbuffer_bits || dev_priv->psr.active)
+		goto unlock;
+
+	intel_psr_activate(dev_priv->psr.dp);
+unlock:
+	mutex_unlock(&dev_priv->psr.lock);
+}
+
+/**
+ * intel_psr_invalidate - Invalidade PSR
+ * @dev_priv: i915 device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
+ * @origin: which operation caused the invalidate
+ *
+ * Since the hardware frontbuffer tracking has gaps we need to integrate
+ * with the software frontbuffer tracking. This function gets called every
+ * time frontbuffer rendering starts and a buffer gets dirtied. PSR must be
+ * disabled if the frontbuffer mask contains a buffer relevant to PSR.
+ *
+ * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits."
+ */
+void intel_psr_invalidate(struct drm_i915_private *dev_priv,
+			  unsigned frontbuffer_bits, enum fb_op_origin origin)
+{
+	if (!CAN_PSR(dev_priv))
+		return;
+
+	if (origin == ORIGIN_FLIP)
+		return;
+
+	mutex_lock(&dev_priv->psr.lock);
+	if (!dev_priv->psr.enabled) {
+		mutex_unlock(&dev_priv->psr.lock);
+		return;
+	}
+
+	frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(dev_priv->psr.pipe);
+	dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits;
+
+	if (frontbuffer_bits)
+		intel_psr_exit(dev_priv);
+
+	mutex_unlock(&dev_priv->psr.lock);
+}
+
+/**
+ * intel_psr_flush - Flush PSR
+ * @dev_priv: i915 device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
+ * @origin: which operation caused the flush
+ *
+ * Since the hardware frontbuffer tracking has gaps we need to integrate
+ * with the software frontbuffer tracking. This function gets called every
+ * time frontbuffer rendering has completed and flushed out to memory. PSR
+ * can be enabled again if no other frontbuffer relevant to PSR is dirty.
+ *
+ * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits.
+ */
+void intel_psr_flush(struct drm_i915_private *dev_priv,
+		     unsigned frontbuffer_bits, enum fb_op_origin origin)
+{
+	if (!CAN_PSR(dev_priv))
+		return;
+
+	if (origin == ORIGIN_FLIP)
+		return;
+
+	mutex_lock(&dev_priv->psr.lock);
+	if (!dev_priv->psr.enabled) {
+		mutex_unlock(&dev_priv->psr.lock);
+		return;
+	}
+
+	frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(dev_priv->psr.pipe);
+	dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits;
+
+	/* By definition flush = invalidate + flush */
+	if (frontbuffer_bits)
+		psr_force_hw_tracking_exit(dev_priv);
+
+	if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits)
+		schedule_work(&dev_priv->psr.work);
+	mutex_unlock(&dev_priv->psr.lock);
+}
+
+/**
+ * intel_psr_init - Init basic PSR work and mutex.
+ * @dev_priv: i915 device private
+ *
+ * This function is  called only once at driver load to initialize basic
+ * PSR stuff.
+ */
+void intel_psr_init(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	if (!HAS_PSR(dev_priv))
+		return;
+
+	dev_priv->psr_mmio_base = IS_HASWELL(dev_priv) ?
+		HSW_EDP_PSR_BASE : BDW_EDP_PSR_BASE;
+
+	if (!dev_priv->psr.sink_support)
+		return;
+
+	if (i915_modparams.enable_psr == -1)
+		if (INTEL_GEN(dev_priv) < 9 || !dev_priv->vbt.psr.enable)
+			i915_modparams.enable_psr = 0;
+
+	/*
+	 * If a PSR error happened and the driver is reloaded, the EDP_PSR_IIR
+	 * will still keep the error set even after the reset done in the
+	 * irq_preinstall and irq_uninstall hooks.
+	 * And enabling in this situation cause the screen to freeze in the
+	 * first time that PSR HW tries to activate so lets keep PSR disabled
+	 * to avoid any rendering problems.
+	 */
+	val = I915_READ(EDP_PSR_IIR);
+	val &= EDP_PSR_ERROR(edp_psr_shift(TRANSCODER_EDP));
+	if (val) {
+		DRM_DEBUG_KMS("PSR interruption error set\n");
+		dev_priv->psr.sink_not_reliable = true;
+	}
+
+	/* Set link_standby x link_off defaults */
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+		/* HSW and BDW require workarounds that we don't implement. */
+		dev_priv->psr.link_standby = false;
+	else
+		/* For new platforms let's respect VBT back again */
+		dev_priv->psr.link_standby = dev_priv->vbt.psr.full_link;
+
+	INIT_WORK(&dev_priv->psr.work, intel_psr_work);
+	mutex_init(&dev_priv->psr.lock);
+}
+
+void intel_psr_short_pulse(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct i915_psr *psr = &dev_priv->psr;
+	u8 val;
+	const u8 errors = DP_PSR_RFB_STORAGE_ERROR |
+			  DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR |
+			  DP_PSR_LINK_CRC_ERROR;
+
+	if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp))
+		return;
+
+	mutex_lock(&psr->lock);
+
+	if (!psr->enabled || psr->dp != intel_dp)
+		goto exit;
+
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_STATUS, &val) != 1) {
+		DRM_ERROR("PSR_STATUS dpcd read failed\n");
+		goto exit;
+	}
+
+	if ((val & DP_PSR_SINK_STATE_MASK) == DP_PSR_SINK_INTERNAL_ERROR) {
+		DRM_DEBUG_KMS("PSR sink internal error, disabling PSR\n");
+		intel_psr_disable_locked(intel_dp);
+		psr->sink_not_reliable = true;
+	}
+
+	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_ERROR_STATUS, &val) != 1) {
+		DRM_ERROR("PSR_ERROR_STATUS dpcd read failed\n");
+		goto exit;
+	}
+
+	if (val & DP_PSR_RFB_STORAGE_ERROR)
+		DRM_DEBUG_KMS("PSR RFB storage error, disabling PSR\n");
+	if (val & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR)
+		DRM_DEBUG_KMS("PSR VSC SDP uncorrectable error, disabling PSR\n");
+	if (val & DP_PSR_LINK_CRC_ERROR)
+		DRM_ERROR("PSR Link CRC error, disabling PSR\n");
+
+	if (val & ~errors)
+		DRM_ERROR("PSR_ERROR_STATUS unhandled errors %x\n",
+			  val & ~errors);
+	if (val & errors) {
+		intel_psr_disable_locked(intel_dp);
+		psr->sink_not_reliable = true;
+	}
+	/* clear status register */
+	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ERROR_STATUS, val);
+exit:
+	mutex_unlock(&psr->lock);
+}
+
+bool intel_psr_enabled(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	bool ret;
+
+	if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp))
+		return false;
+
+	mutex_lock(&dev_priv->psr.lock);
+	ret = (dev_priv->psr.dp == intel_dp && dev_priv->psr.enabled);
+	mutex_unlock(&dev_priv->psr.lock);
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
new file mode 100644
index 000000000000..dc818826f36d
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_PSR_H__
+#define __INTEL_PSR_H__
+
+#include "intel_frontbuffer.h"
+
+struct drm_i915_private;
+struct intel_crtc_state;
+struct intel_dp;
+
+#define CAN_PSR(dev_priv) (HAS_PSR(dev_priv) && dev_priv->psr.sink_support)
+void intel_psr_init_dpcd(struct intel_dp *intel_dp);
+void intel_psr_enable(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state);
+void intel_psr_disable(struct intel_dp *intel_dp,
+		       const struct intel_crtc_state *old_crtc_state);
+void intel_psr_update(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state);
+int intel_psr_debug_set(struct drm_i915_private *dev_priv, u64 value);
+void intel_psr_invalidate(struct drm_i915_private *dev_priv,
+			  unsigned frontbuffer_bits,
+			  enum fb_op_origin origin);
+void intel_psr_flush(struct drm_i915_private *dev_priv,
+		     unsigned frontbuffer_bits,
+		     enum fb_op_origin origin);
+void intel_psr_init(struct drm_i915_private *dev_priv);
+void intel_psr_compute_config(struct intel_dp *intel_dp,
+			      struct intel_crtc_state *crtc_state);
+void intel_psr_irq_control(struct drm_i915_private *dev_priv, u32 debug);
+void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir);
+void intel_psr_short_pulse(struct intel_dp *intel_dp);
+int intel_psr_wait_for_idle(const struct intel_crtc_state *new_crtc_state,
+			    u32 *out_value);
+bool intel_psr_enabled(struct intel_dp *intel_dp);
+
+#endif /* __INTEL_PSR_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
new file mode 100644
index 000000000000..0b749c28541f
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2018 Intel Corporation
+ */
+
+#include <linux/dmi.h>
+
+#include "intel_drv.h"
+#include "intel_quirks.h"
+
+/*
+ * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
+ */
+static void quirk_ssc_force_disable(struct drm_i915_private *i915)
+{
+	i915->quirks |= QUIRK_LVDS_SSC_DISABLE;
+	DRM_INFO("applying lvds SSC disable quirk\n");
+}
+
+/*
+ * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
+ * brightness value
+ */
+static void quirk_invert_brightness(struct drm_i915_private *i915)
+{
+	i915->quirks |= QUIRK_INVERT_BRIGHTNESS;
+	DRM_INFO("applying inverted panel brightness quirk\n");
+}
+
+/* Some VBT's incorrectly indicate no backlight is present */
+static void quirk_backlight_present(struct drm_i915_private *i915)
+{
+	i915->quirks |= QUIRK_BACKLIGHT_PRESENT;
+	DRM_INFO("applying backlight present quirk\n");
+}
+
+/* Toshiba Satellite P50-C-18C requires T12 delay to be min 800ms
+ * which is 300 ms greater than eDP spec T12 min.
+ */
+static void quirk_increase_t12_delay(struct drm_i915_private *i915)
+{
+	i915->quirks |= QUIRK_INCREASE_T12_DELAY;
+	DRM_INFO("Applying T12 delay quirk\n");
+}
+
+/*
+ * GeminiLake NUC HDMI outputs require additional off time
+ * this allows the onboard retimer to correctly sync to signal
+ */
+static void quirk_increase_ddi_disabled_time(struct drm_i915_private *i915)
+{
+	i915->quirks |= QUIRK_INCREASE_DDI_DISABLED_TIME;
+	DRM_INFO("Applying Increase DDI Disabled quirk\n");
+}
+
+struct intel_quirk {
+	int device;
+	int subsystem_vendor;
+	int subsystem_device;
+	void (*hook)(struct drm_i915_private *i915);
+};
+
+/* For systems that don't have a meaningful PCI subdevice/subvendor ID */
+struct intel_dmi_quirk {
+	void (*hook)(struct drm_i915_private *i915);
+	const struct dmi_system_id (*dmi_id_list)[];
+};
+
+static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
+{
+	DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
+	return 1;
+}
+
+static const struct intel_dmi_quirk intel_dmi_quirks[] = {
+	{
+		.dmi_id_list = &(const struct dmi_system_id[]) {
+			{
+				.callback = intel_dmi_reverse_brightness,
+				.ident = "NCR Corporation",
+				.matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
+					    DMI_MATCH(DMI_PRODUCT_NAME, ""),
+				},
+			},
+			{ }  /* terminating entry */
+		},
+		.hook = quirk_invert_brightness,
+	},
+};
+
+static struct intel_quirk intel_quirks[] = {
+	/* Lenovo U160 cannot use SSC on LVDS */
+	{ 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
+
+	/* Sony Vaio Y cannot use SSC on LVDS */
+	{ 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
+
+	/* Acer Aspire 5734Z must invert backlight brightness */
+	{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
+
+	/* Acer/eMachines G725 */
+	{ 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
+
+	/* Acer/eMachines e725 */
+	{ 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
+
+	/* Acer/Packard Bell NCL20 */
+	{ 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
+
+	/* Acer Aspire 4736Z */
+	{ 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
+
+	/* Acer Aspire 5336 */
+	{ 0x2a42, 0x1025, 0x048a, quirk_invert_brightness },
+
+	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
+	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
+
+	/* Acer C720 Chromebook (Core i3 4005U) */
+	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },
+
+	/* Apple Macbook 2,1 (Core 2 T7400) */
+	{ 0x27a2, 0x8086, 0x7270, quirk_backlight_present },
+
+	/* Apple Macbook 4,1 */
+	{ 0x2a02, 0x106b, 0x00a1, quirk_backlight_present },
+
+	/* Toshiba CB35 Chromebook (Celeron 2955U) */
+	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
+
+	/* HP Chromebook 14 (Celeron 2955U) */
+	{ 0x0a06, 0x103c, 0x21ed, quirk_backlight_present },
+
+	/* Dell Chromebook 11 */
+	{ 0x0a06, 0x1028, 0x0a35, quirk_backlight_present },
+
+	/* Dell Chromebook 11 (2015 version) */
+	{ 0x0a16, 0x1028, 0x0a35, quirk_backlight_present },
+
+	/* Toshiba Satellite P50-C-18C */
+	{ 0x191B, 0x1179, 0xF840, quirk_increase_t12_delay },
+
+	/* GeminiLake NUC */
+	{ 0x3185, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
+	{ 0x3184, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
+	/* ASRock ITX*/
+	{ 0x3185, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
+	{ 0x3184, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
+};
+
+void intel_init_quirks(struct drm_i915_private *i915)
+{
+	struct pci_dev *d = i915->drm.pdev;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
+		struct intel_quirk *q = &intel_quirks[i];
+
+		if (d->device == q->device &&
+		    (d->subsystem_vendor == q->subsystem_vendor ||
+		     q->subsystem_vendor == PCI_ANY_ID) &&
+		    (d->subsystem_device == q->subsystem_device ||
+		     q->subsystem_device == PCI_ANY_ID))
+			q->hook(i915);
+	}
+	for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
+		if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
+			intel_dmi_quirks[i].hook(i915);
+	}
+}
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h
new file mode 100644
index 000000000000..b0fcff142a56
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_quirks.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_QUIRKS_H__
+#define __INTEL_QUIRKS_H__
+
+struct drm_i915_private;
+
+void intel_init_quirks(struct drm_i915_private *dev_priv);
+
+#endif /* __INTEL_QUIRKS_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
new file mode 100644
index 000000000000..004b52027ae8
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -0,0 +1,2464 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *   Jesse Barnes <jbarnes@virtuousgeek.org>
+ *
+ * New plane/sprite handling.
+ *
+ * The older chips had a separate interface for programming plane related
+ * registers; newer ones are much simpler and we can use the new DRM plane
+ * support.
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_color_mgmt.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_rect.h>
+#include <drm/i915_drm.h>
+
+#include "i915_drv.h"
+#include "intel_atomic_plane.h"
+#include "intel_drv.h"
+#include "intel_frontbuffer.h"
+#include "intel_pm.h"
+#include "intel_psr.h"
+#include "intel_sprite.h"
+
+bool is_planar_yuv_format(u32 pixelformat)
+{
+	switch (pixelformat) {
+	case DRM_FORMAT_NV12:
+	case DRM_FORMAT_P010:
+	case DRM_FORMAT_P012:
+	case DRM_FORMAT_P016:
+		return true;
+	default:
+		return false;
+	}
+}
+
+int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
+			     int usecs)
+{
+	/* paranoia */
+	if (!adjusted_mode->crtc_htotal)
+		return 1;
+
+	return DIV_ROUND_UP(usecs * adjusted_mode->crtc_clock,
+			    1000 * adjusted_mode->crtc_htotal);
+}
+
+/* FIXME: We should instead only take spinlocks once for the entire update
+ * instead of once per mmio. */
+#if IS_ENABLED(CONFIG_PROVE_LOCKING)
+#define VBLANK_EVASION_TIME_US 250
+#else
+#define VBLANK_EVASION_TIME_US 100
+#endif
+
+/**
+ * intel_pipe_update_start() - start update of a set of display registers
+ * @new_crtc_state: the new crtc state
+ *
+ * Mark the start of an update to pipe registers that should be updated
+ * atomically regarding vblank. If the next vblank will happens within
+ * the next 100 us, this function waits until the vblank passes.
+ *
+ * After a successful call to this function, interrupts will be disabled
+ * until a subsequent call to intel_pipe_update_end(). That is done to
+ * avoid random delays.
+ */
+void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct drm_display_mode *adjusted_mode = &new_crtc_state->base.adjusted_mode;
+	long timeout = msecs_to_jiffies_timeout(1);
+	int scanline, min, max, vblank_start;
+	wait_queue_head_t *wq = drm_crtc_vblank_waitqueue(&crtc->base);
+	bool need_vlv_dsi_wa = (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+		intel_crtc_has_type(new_crtc_state, INTEL_OUTPUT_DSI);
+	DEFINE_WAIT(wait);
+	u32 psr_status;
+
+	vblank_start = adjusted_mode->crtc_vblank_start;
+	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
+		vblank_start = DIV_ROUND_UP(vblank_start, 2);
+
+	/* FIXME needs to be calibrated sensibly */
+	min = vblank_start - intel_usecs_to_scanlines(adjusted_mode,
+						      VBLANK_EVASION_TIME_US);
+	max = vblank_start - 1;
+
+	if (min <= 0 || max <= 0)
+		goto irq_disable;
+
+	if (WARN_ON(drm_crtc_vblank_get(&crtc->base)))
+		goto irq_disable;
+
+	/*
+	 * Wait for psr to idle out after enabling the VBL interrupts
+	 * VBL interrupts will start the PSR exit and prevent a PSR
+	 * re-entry as well.
+	 */
+	if (intel_psr_wait_for_idle(new_crtc_state, &psr_status))
+		DRM_ERROR("PSR idle timed out 0x%x, atomic update may fail\n",
+			  psr_status);
+
+	local_irq_disable();
+
+	crtc->debug.min_vbl = min;
+	crtc->debug.max_vbl = max;
+	trace_i915_pipe_update_start(crtc);
+
+	for (;;) {
+		/*
+		 * prepare_to_wait() has a memory barrier, which guarantees
+		 * other CPUs can see the task state update by the time we
+		 * read the scanline.
+		 */
+		prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE);
+
+		scanline = intel_get_crtc_scanline(crtc);
+		if (scanline < min || scanline > max)
+			break;
+
+		if (!timeout) {
+			DRM_ERROR("Potential atomic update failure on pipe %c\n",
+				  pipe_name(crtc->pipe));
+			break;
+		}
+
+		local_irq_enable();
+
+		timeout = schedule_timeout(timeout);
+
+		local_irq_disable();
+	}
+
+	finish_wait(wq, &wait);
+
+	drm_crtc_vblank_put(&crtc->base);
+
+	/*
+	 * On VLV/CHV DSI the scanline counter would appear to
+	 * increment approx. 1/3 of a scanline before start of vblank.
+	 * The registers still get latched at start of vblank however.
+	 * This means we must not write any registers on the first
+	 * line of vblank (since not the whole line is actually in
+	 * vblank). And unfortunately we can't use the interrupt to
+	 * wait here since it will fire too soon. We could use the
+	 * frame start interrupt instead since it will fire after the
+	 * critical scanline, but that would require more changes
+	 * in the interrupt code. So for now we'll just do the nasty
+	 * thing and poll for the bad scanline to pass us by.
+	 *
+	 * FIXME figure out if BXT+ DSI suffers from this as well
+	 */
+	while (need_vlv_dsi_wa && scanline == vblank_start)
+		scanline = intel_get_crtc_scanline(crtc);
+
+	crtc->debug.scanline_start = scanline;
+	crtc->debug.start_vbl_time = ktime_get();
+	crtc->debug.start_vbl_count = intel_crtc_get_vblank_counter(crtc);
+
+	trace_i915_pipe_update_vblank_evaded(crtc);
+	return;
+
+irq_disable:
+	local_irq_disable();
+}
+
+/**
+ * intel_pipe_update_end() - end update of a set of display registers
+ * @new_crtc_state: the new crtc state
+ *
+ * Mark the end of an update started with intel_pipe_update_start(). This
+ * re-enables interrupts and verifies the update was actually completed
+ * before a vblank.
+ */
+void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
+	enum pipe pipe = crtc->pipe;
+	int scanline_end = intel_get_crtc_scanline(crtc);
+	u32 end_vbl_count = intel_crtc_get_vblank_counter(crtc);
+	ktime_t end_vbl_time = ktime_get();
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	trace_i915_pipe_update_end(crtc, end_vbl_count, scanline_end);
+
+	/* We're still in the vblank-evade critical section, this can't race.
+	 * Would be slightly nice to just grab the vblank count and arm the
+	 * event outside of the critical section - the spinlock might spin for a
+	 * while ... */
+	if (new_crtc_state->base.event) {
+		WARN_ON(drm_crtc_vblank_get(&crtc->base) != 0);
+
+		spin_lock(&crtc->base.dev->event_lock);
+		drm_crtc_arm_vblank_event(&crtc->base, new_crtc_state->base.event);
+		spin_unlock(&crtc->base.dev->event_lock);
+
+		new_crtc_state->base.event = NULL;
+	}
+
+	local_irq_enable();
+
+	if (intel_vgpu_active(dev_priv))
+		return;
+
+	if (crtc->debug.start_vbl_count &&
+	    crtc->debug.start_vbl_count != end_vbl_count) {
+		DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u) time %lld us, min %d, max %d, scanline start %d, end %d\n",
+			  pipe_name(pipe), crtc->debug.start_vbl_count,
+			  end_vbl_count,
+			  ktime_us_delta(end_vbl_time, crtc->debug.start_vbl_time),
+			  crtc->debug.min_vbl, crtc->debug.max_vbl,
+			  crtc->debug.scanline_start, scanline_end);
+	}
+#ifdef CONFIG_DRM_I915_DEBUG_VBLANK_EVADE
+	else if (ktime_us_delta(end_vbl_time, crtc->debug.start_vbl_time) >
+		 VBLANK_EVASION_TIME_US)
+		DRM_WARN("Atomic update on pipe (%c) took %lld us, max time under evasion is %u us\n",
+			 pipe_name(pipe),
+			 ktime_us_delta(end_vbl_time, crtc->debug.start_vbl_time),
+			 VBLANK_EVASION_TIME_US);
+#endif
+}
+
+int intel_plane_check_stride(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	u32 stride, max_stride;
+
+	/*
+	 * We ignore stride for all invisible planes that
+	 * can be remapped. Otherwise we could end up
+	 * with a false positive when the remapping didn't
+	 * kick in due the plane being invisible.
+	 */
+	if (intel_plane_can_remap(plane_state) &&
+	    !plane_state->base.visible)
+		return 0;
+
+	/* FIXME other color planes? */
+	stride = plane_state->color_plane[0].stride;
+	max_stride = plane->max_stride(plane, fb->format->format,
+				       fb->modifier, rotation);
+
+	if (stride > max_stride) {
+		DRM_DEBUG_KMS("[FB:%d] stride (%d) exceeds [PLANE:%d:%s] max stride (%d)\n",
+			      fb->base.id, stride,
+			      plane->base.base.id, plane->base.name, max_stride);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	struct drm_rect *src = &plane_state->base.src;
+	u32 src_x, src_y, src_w, src_h, hsub, vsub;
+	bool rotated = drm_rotation_90_or_270(plane_state->base.rotation);
+
+	/*
+	 * Hardware doesn't handle subpixel coordinates.
+	 * Adjust to (macro)pixel boundary, but be careful not to
+	 * increase the source viewport size, because that could
+	 * push the downscaling factor out of bounds.
+	 */
+	src_x = src->x1 >> 16;
+	src_w = drm_rect_width(src) >> 16;
+	src_y = src->y1 >> 16;
+	src_h = drm_rect_height(src) >> 16;
+
+	src->x1 = src_x << 16;
+	src->x2 = (src_x + src_w) << 16;
+	src->y1 = src_y << 16;
+	src->y2 = (src_y + src_h) << 16;
+
+	if (!fb->format->is_yuv)
+		return 0;
+
+	/* YUV specific checks */
+	if (!rotated) {
+		hsub = fb->format->hsub;
+		vsub = fb->format->vsub;
+	} else {
+		hsub = vsub = max(fb->format->hsub, fb->format->vsub);
+	}
+
+	if (src_x % hsub || src_w % hsub) {
+		DRM_DEBUG_KMS("src x/w (%u, %u) must be a multiple of %u for %sYUV planes\n",
+			      src_x, src_w, hsub, rotated ? "rotated " : "");
+		return -EINVAL;
+	}
+
+	if (src_y % vsub || src_h % vsub) {
+		DRM_DEBUG_KMS("src y/h (%u, %u) must be a multiple of %u for %sYUV planes\n",
+			      src_y, src_h, vsub, rotated ? "rotated " : "");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static unsigned int
+skl_plane_max_stride(struct intel_plane *plane,
+		     u32 pixel_format, u64 modifier,
+		     unsigned int rotation)
+{
+	const struct drm_format_info *info = drm_format_info(pixel_format);
+	int cpp = info->cpp[0];
+
+	/*
+	 * "The stride in bytes must not exceed the
+	 * of the size of 8K pixels and 32K bytes."
+	 */
+	if (drm_rotation_90_or_270(rotation))
+		return min(8192, 32768 / cpp);
+	else
+		return min(8192 * cpp, 32768);
+}
+
+static void
+skl_program_scaler(struct intel_plane *plane,
+		   const struct intel_crtc_state *crtc_state,
+		   const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	int scaler_id = plane_state->scaler_id;
+	const struct intel_scaler *scaler =
+		&crtc_state->scaler_state.scalers[scaler_id];
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_y = plane_state->base.dst.y1;
+	u32 crtc_w = drm_rect_width(&plane_state->base.dst);
+	u32 crtc_h = drm_rect_height(&plane_state->base.dst);
+	u16 y_hphase, uv_rgb_hphase;
+	u16 y_vphase, uv_rgb_vphase;
+	int hscale, vscale;
+
+	hscale = drm_rect_calc_hscale(&plane_state->base.src,
+				      &plane_state->base.dst,
+				      0, INT_MAX);
+	vscale = drm_rect_calc_vscale(&plane_state->base.src,
+				      &plane_state->base.dst,
+				      0, INT_MAX);
+
+	/* TODO: handle sub-pixel coordinates */
+	if (is_planar_yuv_format(plane_state->base.fb->format->format) &&
+	    !icl_is_hdr_plane(dev_priv, plane->id)) {
+		y_hphase = skl_scaler_calc_phase(1, hscale, false);
+		y_vphase = skl_scaler_calc_phase(1, vscale, false);
+
+		/* MPEG2 chroma siting convention */
+		uv_rgb_hphase = skl_scaler_calc_phase(2, hscale, true);
+		uv_rgb_vphase = skl_scaler_calc_phase(2, vscale, false);
+	} else {
+		/* not used */
+		y_hphase = 0;
+		y_vphase = 0;
+
+		uv_rgb_hphase = skl_scaler_calc_phase(1, hscale, false);
+		uv_rgb_vphase = skl_scaler_calc_phase(1, vscale, false);
+	}
+
+	I915_WRITE_FW(SKL_PS_CTRL(pipe, scaler_id),
+		      PS_SCALER_EN | PS_PLANE_SEL(plane->id) | scaler->mode);
+	I915_WRITE_FW(SKL_PS_VPHASE(pipe, scaler_id),
+		      PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase));
+	I915_WRITE_FW(SKL_PS_HPHASE(pipe, scaler_id),
+		      PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase));
+	I915_WRITE_FW(SKL_PS_WIN_POS(pipe, scaler_id), (crtc_x << 16) | crtc_y);
+	I915_WRITE_FW(SKL_PS_WIN_SZ(pipe, scaler_id), (crtc_w << 16) | crtc_h);
+}
+
+/* Preoffset values for YUV to RGB Conversion */
+#define PREOFF_YUV_TO_RGB_HI		0x1800
+#define PREOFF_YUV_TO_RGB_ME		0x1F00
+#define PREOFF_YUV_TO_RGB_LO		0x1800
+
+#define  ROFF(x)          (((x) & 0xffff) << 16)
+#define  GOFF(x)          (((x) & 0xffff) << 0)
+#define  BOFF(x)          (((x) & 0xffff) << 16)
+
+static void
+icl_program_input_csc(struct intel_plane *plane,
+		      const struct intel_crtc_state *crtc_state,
+		      const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	enum plane_id plane_id = plane->id;
+
+	static const u16 input_csc_matrix[][9] = {
+		/*
+		 * BT.601 full range YCbCr -> full range RGB
+		 * The matrix required is :
+		 * [1.000, 0.000, 1.371,
+		 *  1.000, -0.336, -0.698,
+		 *  1.000, 1.732, 0.0000]
+		 */
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x7AF8, 0x7800, 0x0,
+			0x8B28, 0x7800, 0x9AC0,
+			0x0, 0x7800, 0x7DD8,
+		},
+		/*
+		 * BT.709 full range YCbCr -> full range RGB
+		 * The matrix required is :
+		 * [1.000, 0.000, 1.574,
+		 *  1.000, -0.187, -0.468,
+		 *  1.000, 1.855, 0.0000]
+		 */
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x7C98, 0x7800, 0x0,
+			0x9EF8, 0x7800, 0xABF8,
+			0x0, 0x7800,  0x7ED8,
+		},
+	};
+
+	/* Matrix for Limited Range to Full Range Conversion */
+	static const u16 input_csc_matrix_lr[][9] = {
+		/*
+		 * BT.601 Limted range YCbCr -> full range RGB
+		 * The matrix required is :
+		 * [1.164384, 0.000, 1.596370,
+		 *  1.138393, -0.382500, -0.794598,
+		 *  1.138393, 1.971696, 0.0000]
+		 */
+		[DRM_COLOR_YCBCR_BT601] = {
+			0x7CC8, 0x7950, 0x0,
+			0x8CB8, 0x7918, 0x9C40,
+			0x0, 0x7918, 0x7FC8,
+		},
+		/*
+		 * BT.709 Limited range YCbCr -> full range RGB
+		 * The matrix required is :
+		 * [1.164, 0.000, 1.833671,
+		 *  1.138393, -0.213249, -0.532909,
+		 *  1.138393, 2.112402, 0.0000]
+		 */
+		[DRM_COLOR_YCBCR_BT709] = {
+			0x7EA8, 0x7950, 0x0,
+			0x8888, 0x7918, 0xADA8,
+			0x0, 0x7918,  0x6870,
+		},
+	};
+	const u16 *csc;
+
+	if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+		csc = input_csc_matrix[plane_state->base.color_encoding];
+	else
+		csc = input_csc_matrix_lr[plane_state->base.color_encoding];
+
+	I915_WRITE_FW(PLANE_INPUT_CSC_COEFF(pipe, plane_id, 0), ROFF(csc[0]) |
+		      GOFF(csc[1]));
+	I915_WRITE_FW(PLANE_INPUT_CSC_COEFF(pipe, plane_id, 1), BOFF(csc[2]));
+	I915_WRITE_FW(PLANE_INPUT_CSC_COEFF(pipe, plane_id, 2), ROFF(csc[3]) |
+		      GOFF(csc[4]));
+	I915_WRITE_FW(PLANE_INPUT_CSC_COEFF(pipe, plane_id, 3), BOFF(csc[5]));
+	I915_WRITE_FW(PLANE_INPUT_CSC_COEFF(pipe, plane_id, 4), ROFF(csc[6]) |
+		      GOFF(csc[7]));
+	I915_WRITE_FW(PLANE_INPUT_CSC_COEFF(pipe, plane_id, 5), BOFF(csc[8]));
+
+	I915_WRITE_FW(PLANE_INPUT_CSC_PREOFF(pipe, plane_id, 0),
+		      PREOFF_YUV_TO_RGB_HI);
+	I915_WRITE_FW(PLANE_INPUT_CSC_PREOFF(pipe, plane_id, 1),
+		      PREOFF_YUV_TO_RGB_ME);
+	I915_WRITE_FW(PLANE_INPUT_CSC_PREOFF(pipe, plane_id, 2),
+		      PREOFF_YUV_TO_RGB_LO);
+	I915_WRITE_FW(PLANE_INPUT_CSC_POSTOFF(pipe, plane_id, 0), 0x0);
+	I915_WRITE_FW(PLANE_INPUT_CSC_POSTOFF(pipe, plane_id, 1), 0x0);
+	I915_WRITE_FW(PLANE_INPUT_CSC_POSTOFF(pipe, plane_id, 2), 0x0);
+}
+
+static void
+skl_program_plane(struct intel_plane *plane,
+		  const struct intel_crtc_state *crtc_state,
+		  const struct intel_plane_state *plane_state,
+		  int color_plane, bool slave, u32 plane_ctl)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum plane_id plane_id = plane->id;
+	enum pipe pipe = plane->pipe;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	u32 surf_addr = plane_state->color_plane[color_plane].offset;
+	u32 stride = skl_plane_stride(plane_state, color_plane);
+	u32 aux_stride = skl_plane_stride(plane_state, 1);
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_y = plane_state->base.dst.y1;
+	u32 x = plane_state->color_plane[color_plane].x;
+	u32 y = plane_state->color_plane[color_plane].y;
+	u32 src_w = drm_rect_width(&plane_state->base.src) >> 16;
+	u32 src_h = drm_rect_height(&plane_state->base.src) >> 16;
+	struct intel_plane *linked = plane_state->linked_plane;
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	u8 alpha = plane_state->base.alpha >> 8;
+	u32 plane_color_ctl = 0;
+	unsigned long irqflags;
+	u32 keymsk, keymax;
+
+	plane_ctl |= skl_plane_ctl_crtc(crtc_state);
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		plane_color_ctl = plane_state->color_ctl |
+			glk_plane_color_ctl_crtc(crtc_state);
+
+	/* Sizes are 0 based */
+	src_w--;
+	src_h--;
+
+	keymax = (key->max_value & 0xffffff) | PLANE_KEYMAX_ALPHA(alpha);
+
+	keymsk = key->channel_mask & 0x7ffffff;
+	if (alpha < 0xff)
+		keymsk |= PLANE_KEYMSK_ALPHA_ENABLE;
+
+	/* The scaler will handle the output position */
+	if (plane_state->scaler_id >= 0) {
+		crtc_x = 0;
+		crtc_y = 0;
+	}
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(PLANE_STRIDE(pipe, plane_id), stride);
+	I915_WRITE_FW(PLANE_POS(pipe, plane_id), (crtc_y << 16) | crtc_x);
+	I915_WRITE_FW(PLANE_SIZE(pipe, plane_id), (src_h << 16) | src_w);
+	I915_WRITE_FW(PLANE_AUX_DIST(pipe, plane_id),
+		      (plane_state->color_plane[1].offset - surf_addr) | aux_stride);
+
+	if (icl_is_hdr_plane(dev_priv, plane_id)) {
+		u32 cus_ctl = 0;
+
+		if (linked) {
+			/* Enable and use MPEG-2 chroma siting */
+			cus_ctl = PLANE_CUS_ENABLE |
+				PLANE_CUS_HPHASE_0 |
+				PLANE_CUS_VPHASE_SIGN_NEGATIVE |
+				PLANE_CUS_VPHASE_0_25;
+
+			if (linked->id == PLANE_SPRITE5)
+				cus_ctl |= PLANE_CUS_PLANE_7;
+			else if (linked->id == PLANE_SPRITE4)
+				cus_ctl |= PLANE_CUS_PLANE_6;
+			else
+				MISSING_CASE(linked->id);
+		}
+
+		I915_WRITE_FW(PLANE_CUS_CTL(pipe, plane_id), cus_ctl);
+	}
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		I915_WRITE_FW(PLANE_COLOR_CTL(pipe, plane_id), plane_color_ctl);
+
+	if (fb->format->is_yuv && icl_is_hdr_plane(dev_priv, plane_id))
+		icl_program_input_csc(plane, crtc_state, plane_state);
+
+	skl_write_plane_wm(plane, crtc_state);
+
+	I915_WRITE_FW(PLANE_KEYVAL(pipe, plane_id), key->min_value);
+	I915_WRITE_FW(PLANE_KEYMSK(pipe, plane_id), keymsk);
+	I915_WRITE_FW(PLANE_KEYMAX(pipe, plane_id), keymax);
+
+	I915_WRITE_FW(PLANE_OFFSET(pipe, plane_id), (y << 16) | x);
+
+	if (INTEL_GEN(dev_priv) < 11)
+		I915_WRITE_FW(PLANE_AUX_OFFSET(pipe, plane_id),
+			      (plane_state->color_plane[1].y << 16) |
+			      plane_state->color_plane[1].x);
+
+	/*
+	 * The control register self-arms if the plane was previously
+	 * disabled. Try to make the plane enable atomic by writing
+	 * the control register just before the surface register.
+	 */
+	I915_WRITE_FW(PLANE_CTL(pipe, plane_id), plane_ctl);
+	I915_WRITE_FW(PLANE_SURF(pipe, plane_id),
+		      intel_plane_ggtt_offset(plane_state) + surf_addr);
+
+	if (!slave && plane_state->scaler_id >= 0)
+		skl_program_scaler(plane, crtc_state, plane_state);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void
+skl_update_plane(struct intel_plane *plane,
+		 const struct intel_crtc_state *crtc_state,
+		 const struct intel_plane_state *plane_state)
+{
+	int color_plane = 0;
+
+	if (plane_state->linked_plane) {
+		/* Program the UV plane */
+		color_plane = 1;
+	}
+
+	skl_program_plane(plane, crtc_state, plane_state,
+			  color_plane, false, plane_state->ctl);
+}
+
+static void
+icl_update_slave(struct intel_plane *plane,
+		 const struct intel_crtc_state *crtc_state,
+		 const struct intel_plane_state *plane_state)
+{
+	skl_program_plane(plane, crtc_state, plane_state, 0, true,
+			  plane_state->ctl | PLANE_CTL_YUV420_Y_PLANE);
+}
+
+static void
+skl_disable_plane(struct intel_plane *plane,
+		  const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum plane_id plane_id = plane->id;
+	enum pipe pipe = plane->pipe;
+	unsigned long irqflags;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	if (icl_is_hdr_plane(dev_priv, plane_id))
+		I915_WRITE_FW(PLANE_CUS_CTL(pipe, plane_id), 0);
+
+	skl_write_plane_wm(plane, crtc_state);
+
+	I915_WRITE_FW(PLANE_CTL(pipe, plane_id), 0);
+	I915_WRITE_FW(PLANE_SURF(pipe, plane_id), 0);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static bool
+skl_plane_get_hw_state(struct intel_plane *plane,
+		       enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	enum plane_id plane_id = plane->id;
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(plane->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	ret = I915_READ(PLANE_CTL(plane->pipe, plane_id)) & PLANE_CTL_ENABLE;
+
+	*pipe = plane->pipe;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static void
+chv_update_csc(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	enum plane_id plane_id = plane->id;
+	/*
+	 * |r|   | c0 c1 c2 |   |cr|
+	 * |g| = | c3 c4 c5 | x |y |
+	 * |b|   | c6 c7 c8 |   |cb|
+	 *
+	 * Coefficients are s3.12.
+	 *
+	 * Cb and Cr apparently come in as signed already, and
+	 * we always get full range data in on account of CLRC0/1.
+	 */
+	static const s16 csc_matrix[][9] = {
+		/* BT.601 full range YCbCr -> full range RGB */
+		[DRM_COLOR_YCBCR_BT601] = {
+			 5743, 4096,     0,
+			-2925, 4096, -1410,
+			    0, 4096,  7258,
+		},
+		/* BT.709 full range YCbCr -> full range RGB */
+		[DRM_COLOR_YCBCR_BT709] = {
+			 6450, 4096,     0,
+			-1917, 4096,  -767,
+			    0, 4096,  7601,
+		},
+	};
+	const s16 *csc = csc_matrix[plane_state->base.color_encoding];
+
+	/* Seems RGB data bypasses the CSC always */
+	if (!fb->format->is_yuv)
+		return;
+
+	I915_WRITE_FW(SPCSCYGOFF(plane_id), SPCSC_OOFF(0) | SPCSC_IOFF(0));
+	I915_WRITE_FW(SPCSCCBOFF(plane_id), SPCSC_OOFF(0) | SPCSC_IOFF(0));
+	I915_WRITE_FW(SPCSCCROFF(plane_id), SPCSC_OOFF(0) | SPCSC_IOFF(0));
+
+	I915_WRITE_FW(SPCSCC01(plane_id), SPCSC_C1(csc[1]) | SPCSC_C0(csc[0]));
+	I915_WRITE_FW(SPCSCC23(plane_id), SPCSC_C1(csc[3]) | SPCSC_C0(csc[2]));
+	I915_WRITE_FW(SPCSCC45(plane_id), SPCSC_C1(csc[5]) | SPCSC_C0(csc[4]));
+	I915_WRITE_FW(SPCSCC67(plane_id), SPCSC_C1(csc[7]) | SPCSC_C0(csc[6]));
+	I915_WRITE_FW(SPCSCC8(plane_id), SPCSC_C0(csc[8]));
+
+	I915_WRITE_FW(SPCSCYGICLAMP(plane_id), SPCSC_IMAX(1023) | SPCSC_IMIN(0));
+	I915_WRITE_FW(SPCSCCBICLAMP(plane_id), SPCSC_IMAX(512) | SPCSC_IMIN(-512));
+	I915_WRITE_FW(SPCSCCRICLAMP(plane_id), SPCSC_IMAX(512) | SPCSC_IMIN(-512));
+
+	I915_WRITE_FW(SPCSCYGOCLAMP(plane_id), SPCSC_OMAX(1023) | SPCSC_OMIN(0));
+	I915_WRITE_FW(SPCSCCBOCLAMP(plane_id), SPCSC_OMAX(1023) | SPCSC_OMIN(0));
+	I915_WRITE_FW(SPCSCCROCLAMP(plane_id), SPCSC_OMAX(1023) | SPCSC_OMIN(0));
+}
+
+#define SIN_0 0
+#define COS_0 1
+
+static void
+vlv_update_clrc(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	enum pipe pipe = plane->pipe;
+	enum plane_id plane_id = plane->id;
+	int contrast, brightness, sh_scale, sh_sin, sh_cos;
+
+	if (fb->format->is_yuv &&
+	    plane_state->base.color_range == DRM_COLOR_YCBCR_LIMITED_RANGE) {
+		/*
+		 * Expand limited range to full range:
+		 * Contrast is applied first and is used to expand Y range.
+		 * Brightness is applied second and is used to remove the
+		 * offset from Y. Saturation/hue is used to expand CbCr range.
+		 */
+		contrast = DIV_ROUND_CLOSEST(255 << 6, 235 - 16);
+		brightness = -DIV_ROUND_CLOSEST(16 * 255, 235 - 16);
+		sh_scale = DIV_ROUND_CLOSEST(128 << 7, 240 - 128);
+		sh_sin = SIN_0 * sh_scale;
+		sh_cos = COS_0 * sh_scale;
+	} else {
+		/* Pass-through everything. */
+		contrast = 1 << 6;
+		brightness = 0;
+		sh_scale = 1 << 7;
+		sh_sin = SIN_0 * sh_scale;
+		sh_cos = COS_0 * sh_scale;
+	}
+
+	/* FIXME these register are single buffered :( */
+	I915_WRITE_FW(SPCLRC0(pipe, plane_id),
+		      SP_CONTRAST(contrast) | SP_BRIGHTNESS(brightness));
+	I915_WRITE_FW(SPCLRC1(pipe, plane_id),
+		      SP_SH_SIN(sh_sin) | SP_SH_COS(sh_cos));
+}
+
+static u32 vlv_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	u32 sprctl = 0;
+
+	if (crtc_state->gamma_enable)
+		sprctl |= SP_GAMMA_ENABLE;
+
+	return sprctl;
+}
+
+static u32 vlv_sprite_ctl(const struct intel_crtc_state *crtc_state,
+			  const struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	u32 sprctl;
+
+	sprctl = SP_ENABLE;
+
+	switch (fb->format->format) {
+	case DRM_FORMAT_YUYV:
+		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_YUYV;
+		break;
+	case DRM_FORMAT_YVYU:
+		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_YVYU;
+		break;
+	case DRM_FORMAT_UYVY:
+		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_UYVY;
+		break;
+	case DRM_FORMAT_VYUY:
+		sprctl |= SP_FORMAT_YUV422 | SP_YUV_ORDER_VYUY;
+		break;
+	case DRM_FORMAT_RGB565:
+		sprctl |= SP_FORMAT_BGR565;
+		break;
+	case DRM_FORMAT_XRGB8888:
+		sprctl |= SP_FORMAT_BGRX8888;
+		break;
+	case DRM_FORMAT_ARGB8888:
+		sprctl |= SP_FORMAT_BGRA8888;
+		break;
+	case DRM_FORMAT_XBGR2101010:
+		sprctl |= SP_FORMAT_RGBX1010102;
+		break;
+	case DRM_FORMAT_ABGR2101010:
+		sprctl |= SP_FORMAT_RGBA1010102;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		sprctl |= SP_FORMAT_RGBX8888;
+		break;
+	case DRM_FORMAT_ABGR8888:
+		sprctl |= SP_FORMAT_RGBA8888;
+		break;
+	default:
+		MISSING_CASE(fb->format->format);
+		return 0;
+	}
+
+	if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
+		sprctl |= SP_YUV_FORMAT_BT709;
+
+	if (fb->modifier == I915_FORMAT_MOD_X_TILED)
+		sprctl |= SP_TILED;
+
+	if (rotation & DRM_MODE_ROTATE_180)
+		sprctl |= SP_ROTATE_180;
+
+	if (rotation & DRM_MODE_REFLECT_X)
+		sprctl |= SP_MIRROR;
+
+	if (key->flags & I915_SET_COLORKEY_SOURCE)
+		sprctl |= SP_SOURCE_KEY;
+
+	return sprctl;
+}
+
+static void
+vlv_update_plane(struct intel_plane *plane,
+		 const struct intel_crtc_state *crtc_state,
+		 const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	enum plane_id plane_id = plane->id;
+	u32 sprsurf_offset = plane_state->color_plane[0].offset;
+	u32 linear_offset;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_y = plane_state->base.dst.y1;
+	u32 crtc_w = drm_rect_width(&plane_state->base.dst);
+	u32 crtc_h = drm_rect_height(&plane_state->base.dst);
+	u32 x = plane_state->color_plane[0].x;
+	u32 y = plane_state->color_plane[0].y;
+	unsigned long irqflags;
+	u32 sprctl;
+
+	sprctl = plane_state->ctl | vlv_sprite_ctl_crtc(crtc_state);
+
+	/* Sizes are 0 based */
+	crtc_w--;
+	crtc_h--;
+
+	linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(SPSTRIDE(pipe, plane_id),
+		      plane_state->color_plane[0].stride);
+	I915_WRITE_FW(SPPOS(pipe, plane_id), (crtc_y << 16) | crtc_x);
+	I915_WRITE_FW(SPSIZE(pipe, plane_id), (crtc_h << 16) | crtc_w);
+	I915_WRITE_FW(SPCONSTALPHA(pipe, plane_id), 0);
+
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B)
+		chv_update_csc(plane_state);
+
+	if (key->flags) {
+		I915_WRITE_FW(SPKEYMINVAL(pipe, plane_id), key->min_value);
+		I915_WRITE_FW(SPKEYMSK(pipe, plane_id), key->channel_mask);
+		I915_WRITE_FW(SPKEYMAXVAL(pipe, plane_id), key->max_value);
+	}
+
+	I915_WRITE_FW(SPLINOFF(pipe, plane_id), linear_offset);
+	I915_WRITE_FW(SPTILEOFF(pipe, plane_id), (y << 16) | x);
+
+	/*
+	 * The control register self-arms if the plane was previously
+	 * disabled. Try to make the plane enable atomic by writing
+	 * the control register just before the surface register.
+	 */
+	I915_WRITE_FW(SPCNTR(pipe, plane_id), sprctl);
+	I915_WRITE_FW(SPSURF(pipe, plane_id),
+		      intel_plane_ggtt_offset(plane_state) + sprsurf_offset);
+
+	vlv_update_clrc(plane_state);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void
+vlv_disable_plane(struct intel_plane *plane,
+		  const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	enum plane_id plane_id = plane->id;
+	unsigned long irqflags;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(SPCNTR(pipe, plane_id), 0);
+	I915_WRITE_FW(SPSURF(pipe, plane_id), 0);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static bool
+vlv_plane_get_hw_state(struct intel_plane *plane,
+		       enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	enum plane_id plane_id = plane->id;
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(plane->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	ret = I915_READ(SPCNTR(plane->pipe, plane_id)) & SP_ENABLE;
+
+	*pipe = plane->pipe;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static u32 ivb_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	u32 sprctl = 0;
+
+	if (crtc_state->gamma_enable)
+		sprctl |= SPRITE_GAMMA_ENABLE;
+
+	if (crtc_state->csc_enable)
+		sprctl |= SPRITE_PIPE_CSC_ENABLE;
+
+	return sprctl;
+}
+
+static u32 ivb_sprite_ctl(const struct intel_crtc_state *crtc_state,
+			  const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	u32 sprctl;
+
+	sprctl = SPRITE_ENABLE;
+
+	if (IS_IVYBRIDGE(dev_priv))
+		sprctl |= SPRITE_TRICKLE_FEED_DISABLE;
+
+	switch (fb->format->format) {
+	case DRM_FORMAT_XBGR8888:
+		sprctl |= SPRITE_FORMAT_RGBX888 | SPRITE_RGB_ORDER_RGBX;
+		break;
+	case DRM_FORMAT_XRGB8888:
+		sprctl |= SPRITE_FORMAT_RGBX888;
+		break;
+	case DRM_FORMAT_YUYV:
+		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YUYV;
+		break;
+	case DRM_FORMAT_YVYU:
+		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YVYU;
+		break;
+	case DRM_FORMAT_UYVY:
+		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_UYVY;
+		break;
+	case DRM_FORMAT_VYUY:
+		sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_VYUY;
+		break;
+	default:
+		MISSING_CASE(fb->format->format);
+		return 0;
+	}
+
+	if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
+		sprctl |= SPRITE_YUV_TO_RGB_CSC_FORMAT_BT709;
+
+	if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+		sprctl |= SPRITE_YUV_RANGE_CORRECTION_DISABLE;
+
+	if (fb->modifier == I915_FORMAT_MOD_X_TILED)
+		sprctl |= SPRITE_TILED;
+
+	if (rotation & DRM_MODE_ROTATE_180)
+		sprctl |= SPRITE_ROTATE_180;
+
+	if (key->flags & I915_SET_COLORKEY_DESTINATION)
+		sprctl |= SPRITE_DEST_KEY;
+	else if (key->flags & I915_SET_COLORKEY_SOURCE)
+		sprctl |= SPRITE_SOURCE_KEY;
+
+	return sprctl;
+}
+
+static void
+ivb_update_plane(struct intel_plane *plane,
+		 const struct intel_crtc_state *crtc_state,
+		 const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	u32 sprsurf_offset = plane_state->color_plane[0].offset;
+	u32 linear_offset;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_y = plane_state->base.dst.y1;
+	u32 crtc_w = drm_rect_width(&plane_state->base.dst);
+	u32 crtc_h = drm_rect_height(&plane_state->base.dst);
+	u32 x = plane_state->color_plane[0].x;
+	u32 y = plane_state->color_plane[0].y;
+	u32 src_w = drm_rect_width(&plane_state->base.src) >> 16;
+	u32 src_h = drm_rect_height(&plane_state->base.src) >> 16;
+	u32 sprctl, sprscale = 0;
+	unsigned long irqflags;
+
+	sprctl = plane_state->ctl | ivb_sprite_ctl_crtc(crtc_state);
+
+	/* Sizes are 0 based */
+	src_w--;
+	src_h--;
+	crtc_w--;
+	crtc_h--;
+
+	if (crtc_w != src_w || crtc_h != src_h)
+		sprscale = SPRITE_SCALE_ENABLE | (src_w << 16) | src_h;
+
+	linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(SPRSTRIDE(pipe), plane_state->color_plane[0].stride);
+	I915_WRITE_FW(SPRPOS(pipe), (crtc_y << 16) | crtc_x);
+	I915_WRITE_FW(SPRSIZE(pipe), (crtc_h << 16) | crtc_w);
+	if (IS_IVYBRIDGE(dev_priv))
+		I915_WRITE_FW(SPRSCALE(pipe), sprscale);
+
+	if (key->flags) {
+		I915_WRITE_FW(SPRKEYVAL(pipe), key->min_value);
+		I915_WRITE_FW(SPRKEYMSK(pipe), key->channel_mask);
+		I915_WRITE_FW(SPRKEYMAX(pipe), key->max_value);
+	}
+
+	/* HSW consolidates SPRTILEOFF and SPRLINOFF into a single SPROFFSET
+	 * register */
+	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+		I915_WRITE_FW(SPROFFSET(pipe), (y << 16) | x);
+	} else {
+		I915_WRITE_FW(SPRLINOFF(pipe), linear_offset);
+		I915_WRITE_FW(SPRTILEOFF(pipe), (y << 16) | x);
+	}
+
+	/*
+	 * The control register self-arms if the plane was previously
+	 * disabled. Try to make the plane enable atomic by writing
+	 * the control register just before the surface register.
+	 */
+	I915_WRITE_FW(SPRCTL(pipe), sprctl);
+	I915_WRITE_FW(SPRSURF(pipe),
+		      intel_plane_ggtt_offset(plane_state) + sprsurf_offset);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void
+ivb_disable_plane(struct intel_plane *plane,
+		  const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	unsigned long irqflags;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(SPRCTL(pipe), 0);
+	/* Disable the scaler */
+	if (IS_IVYBRIDGE(dev_priv))
+		I915_WRITE_FW(SPRSCALE(pipe), 0);
+	I915_WRITE_FW(SPRSURF(pipe), 0);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static bool
+ivb_plane_get_hw_state(struct intel_plane *plane,
+		       enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(plane->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	ret =  I915_READ(SPRCTL(plane->pipe)) & SPRITE_ENABLE;
+
+	*pipe = plane->pipe;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static unsigned int
+g4x_sprite_max_stride(struct intel_plane *plane,
+		      u32 pixel_format, u64 modifier,
+		      unsigned int rotation)
+{
+	return 16384;
+}
+
+static u32 g4x_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state)
+{
+	u32 dvscntr = 0;
+
+	if (crtc_state->gamma_enable)
+		dvscntr |= DVS_GAMMA_ENABLE;
+
+	if (crtc_state->csc_enable)
+		dvscntr |= DVS_PIPE_CSC_ENABLE;
+
+	return dvscntr;
+}
+
+static u32 g4x_sprite_ctl(const struct intel_crtc_state *crtc_state,
+			  const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	u32 dvscntr;
+
+	dvscntr = DVS_ENABLE;
+
+	if (IS_GEN(dev_priv, 6))
+		dvscntr |= DVS_TRICKLE_FEED_DISABLE;
+
+	switch (fb->format->format) {
+	case DRM_FORMAT_XBGR8888:
+		dvscntr |= DVS_FORMAT_RGBX888 | DVS_RGB_ORDER_XBGR;
+		break;
+	case DRM_FORMAT_XRGB8888:
+		dvscntr |= DVS_FORMAT_RGBX888;
+		break;
+	case DRM_FORMAT_YUYV:
+		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_YUYV;
+		break;
+	case DRM_FORMAT_YVYU:
+		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_YVYU;
+		break;
+	case DRM_FORMAT_UYVY:
+		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_UYVY;
+		break;
+	case DRM_FORMAT_VYUY:
+		dvscntr |= DVS_FORMAT_YUV422 | DVS_YUV_ORDER_VYUY;
+		break;
+	default:
+		MISSING_CASE(fb->format->format);
+		return 0;
+	}
+
+	if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
+		dvscntr |= DVS_YUV_FORMAT_BT709;
+
+	if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+		dvscntr |= DVS_YUV_RANGE_CORRECTION_DISABLE;
+
+	if (fb->modifier == I915_FORMAT_MOD_X_TILED)
+		dvscntr |= DVS_TILED;
+
+	if (rotation & DRM_MODE_ROTATE_180)
+		dvscntr |= DVS_ROTATE_180;
+
+	if (key->flags & I915_SET_COLORKEY_DESTINATION)
+		dvscntr |= DVS_DEST_KEY;
+	else if (key->flags & I915_SET_COLORKEY_SOURCE)
+		dvscntr |= DVS_SOURCE_KEY;
+
+	return dvscntr;
+}
+
+static void
+g4x_update_plane(struct intel_plane *plane,
+		 const struct intel_crtc_state *crtc_state,
+		 const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	u32 dvssurf_offset = plane_state->color_plane[0].offset;
+	u32 linear_offset;
+	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_y = plane_state->base.dst.y1;
+	u32 crtc_w = drm_rect_width(&plane_state->base.dst);
+	u32 crtc_h = drm_rect_height(&plane_state->base.dst);
+	u32 x = plane_state->color_plane[0].x;
+	u32 y = plane_state->color_plane[0].y;
+	u32 src_w = drm_rect_width(&plane_state->base.src) >> 16;
+	u32 src_h = drm_rect_height(&plane_state->base.src) >> 16;
+	u32 dvscntr, dvsscale = 0;
+	unsigned long irqflags;
+
+	dvscntr = plane_state->ctl | g4x_sprite_ctl_crtc(crtc_state);
+
+	/* Sizes are 0 based */
+	src_w--;
+	src_h--;
+	crtc_w--;
+	crtc_h--;
+
+	if (crtc_w != src_w || crtc_h != src_h)
+		dvsscale = DVS_SCALE_ENABLE | (src_w << 16) | src_h;
+
+	linear_offset = intel_fb_xy_to_linear(x, y, plane_state, 0);
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(DVSSTRIDE(pipe), plane_state->color_plane[0].stride);
+	I915_WRITE_FW(DVSPOS(pipe), (crtc_y << 16) | crtc_x);
+	I915_WRITE_FW(DVSSIZE(pipe), (crtc_h << 16) | crtc_w);
+	I915_WRITE_FW(DVSSCALE(pipe), dvsscale);
+
+	if (key->flags) {
+		I915_WRITE_FW(DVSKEYVAL(pipe), key->min_value);
+		I915_WRITE_FW(DVSKEYMSK(pipe), key->channel_mask);
+		I915_WRITE_FW(DVSKEYMAX(pipe), key->max_value);
+	}
+
+	I915_WRITE_FW(DVSLINOFF(pipe), linear_offset);
+	I915_WRITE_FW(DVSTILEOFF(pipe), (y << 16) | x);
+
+	/*
+	 * The control register self-arms if the plane was previously
+	 * disabled. Try to make the plane enable atomic by writing
+	 * the control register just before the surface register.
+	 */
+	I915_WRITE_FW(DVSCNTR(pipe), dvscntr);
+	I915_WRITE_FW(DVSSURF(pipe),
+		      intel_plane_ggtt_offset(plane_state) + dvssurf_offset);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void
+g4x_disable_plane(struct intel_plane *plane,
+		  const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+	unsigned long irqflags;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	I915_WRITE_FW(DVSCNTR(pipe), 0);
+	/* Disable the scaler */
+	I915_WRITE_FW(DVSSCALE(pipe), 0);
+	I915_WRITE_FW(DVSSURF(pipe), 0);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static bool
+g4x_plane_get_hw_state(struct intel_plane *plane,
+		       enum pipe *pipe)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	enum intel_display_power_domain power_domain;
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	power_domain = POWER_DOMAIN_PIPE(plane->pipe);
+	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
+	if (!wakeref)
+		return false;
+
+	ret = I915_READ(DVSCNTR(plane->pipe)) & DVS_ENABLE;
+
+	*pipe = plane->pipe;
+
+	intel_display_power_put(dev_priv, power_domain, wakeref);
+
+	return ret;
+}
+
+static bool intel_fb_scalable(const struct drm_framebuffer *fb)
+{
+	if (!fb)
+		return false;
+
+	switch (fb->format->format) {
+	case DRM_FORMAT_C8:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static int
+g4x_sprite_check_scaling(struct intel_crtc_state *crtc_state,
+			 struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	const struct drm_rect *src = &plane_state->base.src;
+	const struct drm_rect *dst = &plane_state->base.dst;
+	int src_x, src_y, src_w, src_h, crtc_w, crtc_h;
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+	unsigned int cpp = fb->format->cpp[0];
+	unsigned int width_bytes;
+	int min_width, min_height;
+
+	crtc_w = drm_rect_width(dst);
+	crtc_h = drm_rect_height(dst);
+
+	src_x = src->x1 >> 16;
+	src_y = src->y1 >> 16;
+	src_w = drm_rect_width(src) >> 16;
+	src_h = drm_rect_height(src) >> 16;
+
+	if (src_w == crtc_w && src_h == crtc_h)
+		return 0;
+
+	min_width = 3;
+
+	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+		if (src_h & 1) {
+			DRM_DEBUG_KMS("Source height must be even with interlaced modes\n");
+			return -EINVAL;
+		}
+		min_height = 6;
+	} else {
+		min_height = 3;
+	}
+
+	width_bytes = ((src_x * cpp) & 63) + src_w * cpp;
+
+	if (src_w < min_width || src_h < min_height ||
+	    src_w > 2048 || src_h > 2048) {
+		DRM_DEBUG_KMS("Source dimensions (%dx%d) exceed hardware limits (%dx%d - %dx%d)\n",
+			      src_w, src_h, min_width, min_height, 2048, 2048);
+		return -EINVAL;
+	}
+
+	if (width_bytes > 4096) {
+		DRM_DEBUG_KMS("Fetch width (%d) exceeds hardware max with scaling (%u)\n",
+			      width_bytes, 4096);
+		return -EINVAL;
+	}
+
+	if (width_bytes > 4096 || fb->pitches[0] > 4096) {
+		DRM_DEBUG_KMS("Stride (%u) exceeds hardware max with scaling (%u)\n",
+			      fb->pitches[0], 4096);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
+g4x_sprite_check(struct intel_crtc_state *crtc_state,
+		 struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	int min_scale = DRM_PLANE_HELPER_NO_SCALING;
+	int max_scale = DRM_PLANE_HELPER_NO_SCALING;
+	int ret;
+
+	if (intel_fb_scalable(plane_state->base.fb)) {
+		if (INTEL_GEN(dev_priv) < 7) {
+			min_scale = 1;
+			max_scale = 16 << 16;
+		} else if (IS_IVYBRIDGE(dev_priv)) {
+			min_scale = 1;
+			max_scale = 2 << 16;
+		}
+	}
+
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
+						  &crtc_state->base,
+						  min_scale, max_scale,
+						  true, true);
+	if (ret)
+		return ret;
+
+	ret = i9xx_check_plane_surface(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
+
+	ret = g4x_sprite_check_scaling(crtc_state, plane_state);
+	if (ret)
+		return ret;
+
+	if (INTEL_GEN(dev_priv) >= 7)
+		plane_state->ctl = ivb_sprite_ctl(crtc_state, plane_state);
+	else
+		plane_state->ctl = g4x_sprite_ctl(crtc_state, plane_state);
+
+	return 0;
+}
+
+int chv_plane_check_rotation(const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	unsigned int rotation = plane_state->base.rotation;
+
+	/* CHV ignores the mirror bit when the rotate bit is set :( */
+	if (IS_CHERRYVIEW(dev_priv) &&
+	    rotation & DRM_MODE_ROTATE_180 &&
+	    rotation & DRM_MODE_REFLECT_X) {
+		DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
+vlv_sprite_check(struct intel_crtc_state *crtc_state,
+		 struct intel_plane_state *plane_state)
+{
+	int ret;
+
+	ret = chv_plane_check_rotation(plane_state);
+	if (ret)
+		return ret;
+
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
+						  &crtc_state->base,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  true, true);
+	if (ret)
+		return ret;
+
+	ret = i9xx_check_plane_surface(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
+
+	plane_state->ctl = vlv_sprite_ctl(crtc_state, plane_state);
+
+	return 0;
+}
+
+static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
+			      const struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	struct drm_format_name_buf format_name;
+
+	if (!fb)
+		return 0;
+
+	if (rotation & ~(DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180) &&
+	    is_ccs_modifier(fb->modifier)) {
+		DRM_DEBUG_KMS("RC support only with 0/180 degree rotation (%x)\n",
+			      rotation);
+		return -EINVAL;
+	}
+
+	if (rotation & DRM_MODE_REFLECT_X &&
+	    fb->modifier == DRM_FORMAT_MOD_LINEAR) {
+		DRM_DEBUG_KMS("horizontal flip is not supported with linear surface formats\n");
+		return -EINVAL;
+	}
+
+	if (drm_rotation_90_or_270(rotation)) {
+		if (fb->modifier != I915_FORMAT_MOD_Y_TILED &&
+		    fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
+			DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * 90/270 is not allowed with RGB64 16:16:16:16 and
+		 * Indexed 8-bit. RGB 16-bit 5:6:5 is allowed gen11 onwards.
+		 */
+		switch (fb->format->format) {
+		case DRM_FORMAT_RGB565:
+			if (INTEL_GEN(dev_priv) >= 11)
+				break;
+			/* fall through */
+		case DRM_FORMAT_C8:
+		case DRM_FORMAT_XRGB16161616F:
+		case DRM_FORMAT_XBGR16161616F:
+		case DRM_FORMAT_ARGB16161616F:
+		case DRM_FORMAT_ABGR16161616F:
+		case DRM_FORMAT_Y210:
+		case DRM_FORMAT_Y212:
+		case DRM_FORMAT_Y216:
+		case DRM_FORMAT_XVYU12_16161616:
+		case DRM_FORMAT_XVYU16161616:
+			DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
+				      drm_get_format_name(fb->format->format,
+							  &format_name));
+			return -EINVAL;
+		default:
+			break;
+		}
+	}
+
+	/* Y-tiling is not supported in IF-ID Interlace mode */
+	if (crtc_state->base.enable &&
+	    crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE &&
+	    (fb->modifier == I915_FORMAT_MOD_Y_TILED ||
+	     fb->modifier == I915_FORMAT_MOD_Yf_TILED ||
+	     fb->modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
+	     fb->modifier == I915_FORMAT_MOD_Yf_TILED_CCS)) {
+		DRM_DEBUG_KMS("Y/Yf tiling not supported in IF-ID mode\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int skl_plane_check_dst_coordinates(const struct intel_crtc_state *crtc_state,
+					   const struct intel_plane_state *plane_state)
+{
+	struct drm_i915_private *dev_priv =
+		to_i915(plane_state->base.plane->dev);
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_w = drm_rect_width(&plane_state->base.dst);
+	int pipe_src_w = crtc_state->pipe_src_w;
+
+	/*
+	 * Display WA #1175: cnl,glk
+	 * Planes other than the cursor may cause FIFO underflow and display
+	 * corruption if starting less than 4 pixels from the right edge of
+	 * the screen.
+	 * Besides the above WA fix the similar problem, where planes other
+	 * than the cursor ending less than 4 pixels from the left edge of the
+	 * screen may cause FIFO underflow and display corruption.
+	 */
+	if ((IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) &&
+	    (crtc_x + crtc_w < 4 || crtc_x > pipe_src_w - 4)) {
+		DRM_DEBUG_KMS("requested plane X %s position %d invalid (valid range %d-%d)\n",
+			      crtc_x + crtc_w < 4 ? "end" : "start",
+			      crtc_x + crtc_w < 4 ? crtc_x + crtc_w : crtc_x,
+			      4, pipe_src_w - 4);
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
+static int skl_plane_check_nv12_rotation(const struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	int src_w = drm_rect_width(&plane_state->base.src) >> 16;
+
+	/* Display WA #1106 */
+	if (is_planar_yuv_format(fb->format->format) && src_w & 3 &&
+	    (rotation == DRM_MODE_ROTATE_270 ||
+	     rotation == (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90))) {
+		DRM_DEBUG_KMS("src width must be multiple of 4 for rotated planar YUV\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int skl_plane_check(struct intel_crtc_state *crtc_state,
+			   struct intel_plane_state *plane_state)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	int min_scale = DRM_PLANE_HELPER_NO_SCALING;
+	int max_scale = DRM_PLANE_HELPER_NO_SCALING;
+	int ret;
+
+	ret = skl_plane_check_fb(crtc_state, plane_state);
+	if (ret)
+		return ret;
+
+	/* use scaler when colorkey is not required */
+	if (!plane_state->ckey.flags && intel_fb_scalable(fb)) {
+		min_scale = 1;
+		max_scale = skl_max_scale(crtc_state, fb->format->format);
+	}
+
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
+						  &crtc_state->base,
+						  min_scale, max_scale,
+						  true, true);
+	if (ret)
+		return ret;
+
+	ret = skl_check_plane_surface(plane_state);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	ret = skl_plane_check_dst_coordinates(crtc_state, plane_state);
+	if (ret)
+		return ret;
+
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
+
+	ret = skl_plane_check_nv12_rotation(plane_state);
+	if (ret)
+		return ret;
+
+	/* HW only has 8 bits pixel precision, disable plane if invisible */
+	if (!(plane_state->base.alpha >> 8))
+		plane_state->base.visible = false;
+
+	plane_state->ctl = skl_plane_ctl(crtc_state, plane_state);
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		plane_state->color_ctl = glk_plane_color_ctl(crtc_state,
+							     plane_state);
+
+	return 0;
+}
+
+static bool has_dst_key_in_primary_plane(struct drm_i915_private *dev_priv)
+{
+	return INTEL_GEN(dev_priv) >= 9;
+}
+
+static void intel_plane_set_ckey(struct intel_plane_state *plane_state,
+				 const struct drm_intel_sprite_colorkey *set)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+
+	*key = *set;
+
+	/*
+	 * We want src key enabled on the
+	 * sprite and not on the primary.
+	 */
+	if (plane->id == PLANE_PRIMARY &&
+	    set->flags & I915_SET_COLORKEY_SOURCE)
+		key->flags = 0;
+
+	/*
+	 * On SKL+ we want dst key enabled on
+	 * the primary and not on the sprite.
+	 */
+	if (INTEL_GEN(dev_priv) >= 9 && plane->id != PLANE_PRIMARY &&
+	    set->flags & I915_SET_COLORKEY_DESTINATION)
+		key->flags = 0;
+}
+
+int intel_sprite_set_colorkey_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *file_priv)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_intel_sprite_colorkey *set = data;
+	struct drm_plane *plane;
+	struct drm_plane_state *plane_state;
+	struct drm_atomic_state *state;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret = 0;
+
+	/* ignore the pointless "none" flag */
+	set->flags &= ~I915_SET_COLORKEY_NONE;
+
+	if (set->flags & ~(I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
+		return -EINVAL;
+
+	/* Make sure we don't try to enable both src & dest simultaneously */
+	if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
+		return -EINVAL;
+
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	    set->flags & I915_SET_COLORKEY_DESTINATION)
+		return -EINVAL;
+
+	plane = drm_plane_find(dev, file_priv, set->plane_id);
+	if (!plane || plane->type != DRM_PLANE_TYPE_OVERLAY)
+		return -ENOENT;
+
+	/*
+	 * SKL+ only plane 2 can do destination keying against plane 1.
+	 * Also multiple planes can't do destination keying on the same
+	 * pipe simultaneously.
+	 */
+	if (INTEL_GEN(dev_priv) >= 9 &&
+	    to_intel_plane(plane)->id >= PLANE_SPRITE1 &&
+	    set->flags & I915_SET_COLORKEY_DESTINATION)
+		return -EINVAL;
+
+	drm_modeset_acquire_init(&ctx, 0);
+
+	state = drm_atomic_state_alloc(plane->dev);
+	if (!state) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	state->acquire_ctx = &ctx;
+
+	while (1) {
+		plane_state = drm_atomic_get_plane_state(state, plane);
+		ret = PTR_ERR_OR_ZERO(plane_state);
+		if (!ret)
+			intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
+
+		/*
+		 * On some platforms we have to configure
+		 * the dst colorkey on the primary plane.
+		 */
+		if (!ret && has_dst_key_in_primary_plane(dev_priv)) {
+			struct intel_crtc *crtc =
+				intel_get_crtc_for_pipe(dev_priv,
+							to_intel_plane(plane)->pipe);
+
+			plane_state = drm_atomic_get_plane_state(state,
+								 crtc->base.primary);
+			ret = PTR_ERR_OR_ZERO(plane_state);
+			if (!ret)
+				intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
+		}
+
+		if (!ret)
+			ret = drm_atomic_commit(state);
+
+		if (ret != -EDEADLK)
+			break;
+
+		drm_atomic_state_clear(state);
+		drm_modeset_backoff(&ctx);
+	}
+
+	drm_atomic_state_put(state);
+out:
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+	return ret;
+}
+
+static const u32 g4x_plane_formats[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+};
+
+static const u64 i9xx_plane_format_modifiers[] = {
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static const u32 snb_plane_formats[] = {
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+};
+
+static const u32 vlv_plane_formats[] = {
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_ABGR2101010,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+};
+
+static const u32 skl_plane_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+};
+
+static const u32 icl_plane_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_Y210,
+	DRM_FORMAT_Y212,
+	DRM_FORMAT_Y216,
+	DRM_FORMAT_XVYU2101010,
+	DRM_FORMAT_XVYU12_16161616,
+	DRM_FORMAT_XVYU16161616,
+};
+
+static const u32 icl_hdr_plane_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_XRGB16161616F,
+	DRM_FORMAT_XBGR16161616F,
+	DRM_FORMAT_ARGB16161616F,
+	DRM_FORMAT_ABGR16161616F,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_Y210,
+	DRM_FORMAT_Y212,
+	DRM_FORMAT_Y216,
+	DRM_FORMAT_XVYU2101010,
+	DRM_FORMAT_XVYU12_16161616,
+	DRM_FORMAT_XVYU16161616,
+};
+
+static const u32 skl_planar_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_NV12,
+};
+
+static const u32 glk_planar_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_P010,
+	DRM_FORMAT_P012,
+	DRM_FORMAT_P016,
+};
+
+static const u32 icl_planar_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_P010,
+	DRM_FORMAT_P012,
+	DRM_FORMAT_P016,
+	DRM_FORMAT_Y210,
+	DRM_FORMAT_Y212,
+	DRM_FORMAT_Y216,
+	DRM_FORMAT_XVYU2101010,
+	DRM_FORMAT_XVYU12_16161616,
+	DRM_FORMAT_XVYU16161616,
+};
+
+static const u32 icl_hdr_planar_formats[] = {
+	DRM_FORMAT_C8,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XRGB2101010,
+	DRM_FORMAT_XBGR2101010,
+	DRM_FORMAT_XRGB16161616F,
+	DRM_FORMAT_XBGR16161616F,
+	DRM_FORMAT_ARGB16161616F,
+	DRM_FORMAT_ABGR16161616F,
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_P010,
+	DRM_FORMAT_P012,
+	DRM_FORMAT_P016,
+	DRM_FORMAT_Y210,
+	DRM_FORMAT_Y212,
+	DRM_FORMAT_Y216,
+	DRM_FORMAT_XVYU2101010,
+	DRM_FORMAT_XVYU12_16161616,
+	DRM_FORMAT_XVYU16161616,
+};
+
+static const u64 skl_plane_format_modifiers_noccs[] = {
+	I915_FORMAT_MOD_Yf_TILED,
+	I915_FORMAT_MOD_Y_TILED,
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static const u64 skl_plane_format_modifiers_ccs[] = {
+	I915_FORMAT_MOD_Yf_TILED_CCS,
+	I915_FORMAT_MOD_Y_TILED_CCS,
+	I915_FORMAT_MOD_Yf_TILED,
+	I915_FORMAT_MOD_Y_TILED,
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static bool g4x_sprite_format_mod_supported(struct drm_plane *_plane,
+					    u32 format, u64 modifier)
+{
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		break;
+	default:
+		return false;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YVYU:
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_VYUY:
+		if (modifier == DRM_FORMAT_MOD_LINEAR ||
+		    modifier == I915_FORMAT_MOD_X_TILED)
+			return true;
+		/* fall through */
+	default:
+		return false;
+	}
+}
+
+static bool snb_sprite_format_mod_supported(struct drm_plane *_plane,
+					    u32 format, u64 modifier)
+{
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		break;
+	default:
+		return false;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YVYU:
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_VYUY:
+		if (modifier == DRM_FORMAT_MOD_LINEAR ||
+		    modifier == I915_FORMAT_MOD_X_TILED)
+			return true;
+		/* fall through */
+	default:
+		return false;
+	}
+}
+
+static bool vlv_sprite_format_mod_supported(struct drm_plane *_plane,
+					    u32 format, u64 modifier)
+{
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+		break;
+	default:
+		return false;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_ABGR8888:
+	case DRM_FORMAT_ARGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR2101010:
+	case DRM_FORMAT_ABGR2101010:
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YVYU:
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_VYUY:
+		if (modifier == DRM_FORMAT_MOD_LINEAR ||
+		    modifier == I915_FORMAT_MOD_X_TILED)
+			return true;
+		/* fall through */
+	default:
+		return false;
+	}
+}
+
+static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
+					   u32 format, u64 modifier)
+{
+	struct intel_plane *plane = to_intel_plane(_plane);
+
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case I915_FORMAT_MOD_X_TILED:
+	case I915_FORMAT_MOD_Y_TILED:
+	case I915_FORMAT_MOD_Yf_TILED:
+		break;
+	case I915_FORMAT_MOD_Y_TILED_CCS:
+	case I915_FORMAT_MOD_Yf_TILED_CCS:
+		if (!plane->has_ccs)
+			return false;
+		break;
+	default:
+		return false;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_ARGB8888:
+	case DRM_FORMAT_ABGR8888:
+		if (is_ccs_modifier(modifier))
+			return true;
+		/* fall through */
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB2101010:
+	case DRM_FORMAT_XBGR2101010:
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YVYU:
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_VYUY:
+	case DRM_FORMAT_NV12:
+	case DRM_FORMAT_P010:
+	case DRM_FORMAT_P012:
+	case DRM_FORMAT_P016:
+	case DRM_FORMAT_XVYU2101010:
+		if (modifier == I915_FORMAT_MOD_Yf_TILED)
+			return true;
+		/* fall through */
+	case DRM_FORMAT_C8:
+	case DRM_FORMAT_XBGR16161616F:
+	case DRM_FORMAT_ABGR16161616F:
+	case DRM_FORMAT_XRGB16161616F:
+	case DRM_FORMAT_ARGB16161616F:
+	case DRM_FORMAT_Y210:
+	case DRM_FORMAT_Y212:
+	case DRM_FORMAT_Y216:
+	case DRM_FORMAT_XVYU12_16161616:
+	case DRM_FORMAT_XVYU16161616:
+		if (modifier == DRM_FORMAT_MOD_LINEAR ||
+		    modifier == I915_FORMAT_MOD_X_TILED ||
+		    modifier == I915_FORMAT_MOD_Y_TILED)
+			return true;
+		/* fall through */
+	default:
+		return false;
+	}
+}
+
+static const struct drm_plane_funcs g4x_sprite_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = g4x_sprite_format_mod_supported,
+};
+
+static const struct drm_plane_funcs snb_sprite_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = snb_sprite_format_mod_supported,
+};
+
+static const struct drm_plane_funcs vlv_sprite_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = vlv_sprite_format_mod_supported,
+};
+
+static const struct drm_plane_funcs skl_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = intel_plane_destroy,
+	.atomic_duplicate_state = intel_plane_duplicate_state,
+	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = skl_plane_format_mod_supported,
+};
+
+static bool skl_plane_has_fbc(struct drm_i915_private *dev_priv,
+			      enum pipe pipe, enum plane_id plane_id)
+{
+	if (!HAS_FBC(dev_priv))
+		return false;
+
+	return pipe == PIPE_A && plane_id == PLANE_PRIMARY;
+}
+
+static bool skl_plane_has_planar(struct drm_i915_private *dev_priv,
+				 enum pipe pipe, enum plane_id plane_id)
+{
+	if (INTEL_GEN(dev_priv) >= 11)
+		return plane_id <= PLANE_SPRITE3;
+
+	/* Display WA #0870: skl, bxt */
+	if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
+		return false;
+
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) && pipe == PIPE_C)
+		return false;
+
+	if (plane_id != PLANE_PRIMARY && plane_id != PLANE_SPRITE0)
+		return false;
+
+	return true;
+}
+
+static bool skl_plane_has_ccs(struct drm_i915_private *dev_priv,
+			      enum pipe pipe, enum plane_id plane_id)
+{
+	if (plane_id == PLANE_CURSOR)
+		return false;
+
+	if (INTEL_GEN(dev_priv) >= 10)
+		return true;
+
+	if (IS_GEMINILAKE(dev_priv))
+		return pipe != PIPE_C;
+
+	return pipe != PIPE_C &&
+		(plane_id == PLANE_PRIMARY ||
+		 plane_id == PLANE_SPRITE0);
+}
+
+struct intel_plane *
+skl_universal_plane_create(struct drm_i915_private *dev_priv,
+			   enum pipe pipe, enum plane_id plane_id)
+{
+	struct intel_plane *plane;
+	enum drm_plane_type plane_type;
+	unsigned int supported_rotations;
+	unsigned int possible_crtcs;
+	const u64 *modifiers;
+	const u32 *formats;
+	int num_formats;
+	int ret;
+
+	plane = intel_plane_alloc();
+	if (IS_ERR(plane))
+		return plane;
+
+	plane->pipe = pipe;
+	plane->id = plane_id;
+	plane->frontbuffer_bit = INTEL_FRONTBUFFER(pipe, plane_id);
+
+	plane->has_fbc = skl_plane_has_fbc(dev_priv, pipe, plane_id);
+	if (plane->has_fbc) {
+		struct intel_fbc *fbc = &dev_priv->fbc;
+
+		fbc->possible_framebuffer_bits |= plane->frontbuffer_bit;
+	}
+
+	plane->max_stride = skl_plane_max_stride;
+	plane->update_plane = skl_update_plane;
+	plane->disable_plane = skl_disable_plane;
+	plane->get_hw_state = skl_plane_get_hw_state;
+	plane->check_plane = skl_plane_check;
+	if (icl_is_nv12_y_plane(plane_id))
+		plane->update_slave = icl_update_slave;
+
+	if (skl_plane_has_planar(dev_priv, pipe, plane_id)) {
+		if (icl_is_hdr_plane(dev_priv, plane_id)) {
+			formats = icl_hdr_planar_formats;
+			num_formats = ARRAY_SIZE(icl_hdr_planar_formats);
+		} else if (INTEL_GEN(dev_priv) >= 11) {
+			formats = icl_planar_formats;
+			num_formats = ARRAY_SIZE(icl_planar_formats);
+		} else if (INTEL_GEN(dev_priv) == 10 || IS_GEMINILAKE(dev_priv)) {
+			formats = glk_planar_formats;
+			num_formats = ARRAY_SIZE(glk_planar_formats);
+		} else {
+			formats = skl_planar_formats;
+			num_formats = ARRAY_SIZE(skl_planar_formats);
+		}
+	} else if (icl_is_hdr_plane(dev_priv, plane_id)) {
+		formats = icl_hdr_plane_formats;
+		num_formats = ARRAY_SIZE(icl_hdr_plane_formats);
+	} else if (INTEL_GEN(dev_priv) >= 11) {
+		formats = icl_plane_formats;
+		num_formats = ARRAY_SIZE(icl_plane_formats);
+	} else {
+		formats = skl_plane_formats;
+		num_formats = ARRAY_SIZE(skl_plane_formats);
+	}
+
+	plane->has_ccs = skl_plane_has_ccs(dev_priv, pipe, plane_id);
+	if (plane->has_ccs)
+		modifiers = skl_plane_format_modifiers_ccs;
+	else
+		modifiers = skl_plane_format_modifiers_noccs;
+
+	if (plane_id == PLANE_PRIMARY)
+		plane_type = DRM_PLANE_TYPE_PRIMARY;
+	else
+		plane_type = DRM_PLANE_TYPE_OVERLAY;
+
+	possible_crtcs = BIT(pipe);
+
+	ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
+				       possible_crtcs, &skl_plane_funcs,
+				       formats, num_formats, modifiers,
+				       plane_type,
+				       "plane %d%c", plane_id + 1,
+				       pipe_name(pipe));
+	if (ret)
+		goto fail;
+
+	supported_rotations =
+		DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 |
+		DRM_MODE_ROTATE_180 | DRM_MODE_ROTATE_270;
+
+	if (INTEL_GEN(dev_priv) >= 10)
+		supported_rotations |= DRM_MODE_REFLECT_X;
+
+	drm_plane_create_rotation_property(&plane->base,
+					   DRM_MODE_ROTATE_0,
+					   supported_rotations);
+
+	drm_plane_create_color_properties(&plane->base,
+					  BIT(DRM_COLOR_YCBCR_BT601) |
+					  BIT(DRM_COLOR_YCBCR_BT709),
+					  BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+					  BIT(DRM_COLOR_YCBCR_FULL_RANGE),
+					  DRM_COLOR_YCBCR_BT709,
+					  DRM_COLOR_YCBCR_LIMITED_RANGE);
+
+	drm_plane_create_alpha_property(&plane->base);
+	drm_plane_create_blend_mode_property(&plane->base,
+					     BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+					     BIT(DRM_MODE_BLEND_PREMULTI) |
+					     BIT(DRM_MODE_BLEND_COVERAGE));
+
+	drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
+
+	return plane;
+
+fail:
+	intel_plane_free(plane);
+
+	return ERR_PTR(ret);
+}
+
+struct intel_plane *
+intel_sprite_plane_create(struct drm_i915_private *dev_priv,
+			  enum pipe pipe, int sprite)
+{
+	struct intel_plane *plane;
+	const struct drm_plane_funcs *plane_funcs;
+	unsigned long possible_crtcs;
+	unsigned int supported_rotations;
+	const u64 *modifiers;
+	const u32 *formats;
+	int num_formats;
+	int ret;
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		return skl_universal_plane_create(dev_priv, pipe,
+						  PLANE_SPRITE0 + sprite);
+
+	plane = intel_plane_alloc();
+	if (IS_ERR(plane))
+		return plane;
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		plane->max_stride = i9xx_plane_max_stride;
+		plane->update_plane = vlv_update_plane;
+		plane->disable_plane = vlv_disable_plane;
+		plane->get_hw_state = vlv_plane_get_hw_state;
+		plane->check_plane = vlv_sprite_check;
+
+		formats = vlv_plane_formats;
+		num_formats = ARRAY_SIZE(vlv_plane_formats);
+		modifiers = i9xx_plane_format_modifiers;
+
+		plane_funcs = &vlv_sprite_funcs;
+	} else if (INTEL_GEN(dev_priv) >= 7) {
+		plane->max_stride = g4x_sprite_max_stride;
+		plane->update_plane = ivb_update_plane;
+		plane->disable_plane = ivb_disable_plane;
+		plane->get_hw_state = ivb_plane_get_hw_state;
+		plane->check_plane = g4x_sprite_check;
+
+		formats = snb_plane_formats;
+		num_formats = ARRAY_SIZE(snb_plane_formats);
+		modifiers = i9xx_plane_format_modifiers;
+
+		plane_funcs = &snb_sprite_funcs;
+	} else {
+		plane->max_stride = g4x_sprite_max_stride;
+		plane->update_plane = g4x_update_plane;
+		plane->disable_plane = g4x_disable_plane;
+		plane->get_hw_state = g4x_plane_get_hw_state;
+		plane->check_plane = g4x_sprite_check;
+
+		modifiers = i9xx_plane_format_modifiers;
+		if (IS_GEN(dev_priv, 6)) {
+			formats = snb_plane_formats;
+			num_formats = ARRAY_SIZE(snb_plane_formats);
+
+			plane_funcs = &snb_sprite_funcs;
+		} else {
+			formats = g4x_plane_formats;
+			num_formats = ARRAY_SIZE(g4x_plane_formats);
+
+			plane_funcs = &g4x_sprite_funcs;
+		}
+	}
+
+	if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B) {
+		supported_rotations =
+			DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
+			DRM_MODE_REFLECT_X;
+	} else {
+		supported_rotations =
+			DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180;
+	}
+
+	plane->pipe = pipe;
+	plane->id = PLANE_SPRITE0 + sprite;
+	plane->frontbuffer_bit = INTEL_FRONTBUFFER(pipe, plane->id);
+
+	possible_crtcs = BIT(pipe);
+
+	ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
+				       possible_crtcs, plane_funcs,
+				       formats, num_formats, modifiers,
+				       DRM_PLANE_TYPE_OVERLAY,
+				       "sprite %c", sprite_name(pipe, sprite));
+	if (ret)
+		goto fail;
+
+	drm_plane_create_rotation_property(&plane->base,
+					   DRM_MODE_ROTATE_0,
+					   supported_rotations);
+
+	drm_plane_create_color_properties(&plane->base,
+					  BIT(DRM_COLOR_YCBCR_BT601) |
+					  BIT(DRM_COLOR_YCBCR_BT709),
+					  BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+					  BIT(DRM_COLOR_YCBCR_FULL_RANGE),
+					  DRM_COLOR_YCBCR_BT709,
+					  DRM_COLOR_YCBCR_LIMITED_RANGE);
+
+	drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
+
+	return plane;
+
+fail:
+	intel_plane_free(plane);
+
+	return ERR_PTR(ret);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.h b/drivers/gpu/drm/i915/display/intel_sprite.h
new file mode 100644
index 000000000000..500f6bffb139
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_sprite.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_SPRITE_H__
+#define __INTEL_SPRITE_H__
+
+#include <linux/types.h>
+
+#include "i915_drv.h"
+#include "intel_display.h"
+
+struct drm_device;
+struct drm_display_mode;
+struct drm_file;
+struct drm_i915_private;
+struct intel_crtc_state;
+struct intel_plane_state;
+
+bool is_planar_yuv_format(u32 pixelformat);
+int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
+			     int usecs);
+struct intel_plane *intel_sprite_plane_create(struct drm_i915_private *dev_priv,
+					      enum pipe pipe, int plane);
+int intel_sprite_set_colorkey_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *file_priv);
+void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state);
+void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state);
+int intel_plane_check_stride(const struct intel_plane_state *plane_state);
+int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state);
+int chv_plane_check_rotation(const struct intel_plane_state *plane_state);
+struct intel_plane *
+skl_universal_plane_create(struct drm_i915_private *dev_priv,
+			   enum pipe pipe, enum plane_id plane_id);
+
+static inline bool icl_is_nv12_y_plane(enum plane_id id)
+{
+	/* Don't need to do a gen check, these planes are only available on gen11 */
+	if (id == PLANE_SPRITE4 || id == PLANE_SPRITE5)
+		return true;
+
+	return false;
+}
+
+static inline u8 icl_hdr_plane_mask(void)
+{
+	return BIT(PLANE_PRIMARY) |
+		BIT(PLANE_SPRITE0) | BIT(PLANE_SPRITE1);
+}
+
+static inline bool icl_is_hdr_plane(struct drm_i915_private *dev_priv,
+				    enum plane_id plane_id)
+{
+	return INTEL_GEN(dev_priv) >= 11 &&
+		icl_hdr_plane_mask() & BIT(plane_id);
+}
+
+#endif /* __INTEL_SPRITE_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
new file mode 100644
index 000000000000..89ef14cafb6b
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -0,0 +1,808 @@
+/*
+ * Copyright © 2006-2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/*
+ * This information is private to VBT parsing in intel_bios.c.
+ *
+ * Please do NOT include anywhere else.
+ */
+#ifndef _INTEL_BIOS_PRIVATE
+#error "intel_vbt_defs.h is private to intel_bios.c"
+#endif
+
+#ifndef _INTEL_VBT_DEFS_H_
+#define _INTEL_VBT_DEFS_H_
+
+#include "intel_bios.h"
+
+/**
+ * struct vbt_header - VBT Header structure
+ * @signature:		VBT signature, always starts with "$VBT"
+ * @version:		Version of this structure
+ * @header_size:	Size of this structure
+ * @vbt_size:		Size of VBT (VBT Header, BDB Header and data blocks)
+ * @vbt_checksum:	Checksum
+ * @reserved0:		Reserved
+ * @bdb_offset:		Offset of &struct bdb_header from beginning of VBT
+ * @aim_offset:		Offsets of add-in data blocks from beginning of VBT
+ */
+struct vbt_header {
+	u8 signature[20];
+	u16 version;
+	u16 header_size;
+	u16 vbt_size;
+	u8 vbt_checksum;
+	u8 reserved0;
+	u32 bdb_offset;
+	u32 aim_offset[4];
+} __packed;
+
+/**
+ * struct bdb_header - BDB Header structure
+ * @signature:		BDB signature "BIOS_DATA_BLOCK"
+ * @version:		Version of the data block definitions
+ * @header_size:	Size of this structure
+ * @bdb_size:		Size of BDB (BDB Header and data blocks)
+ */
+struct bdb_header {
+	u8 signature[16];
+	u16 version;
+	u16 header_size;
+	u16 bdb_size;
+} __packed;
+
+/*
+ * There are several types of BIOS data blocks (BDBs), each block has
+ * an ID and size in the first 3 bytes (ID in first, size in next 2).
+ * Known types are listed below.
+ */
+enum bdb_block_id {
+	BDB_GENERAL_FEATURES		= 1,
+	BDB_GENERAL_DEFINITIONS		= 2,
+	BDB_OLD_TOGGLE_LIST		= 3,
+	BDB_MODE_SUPPORT_LIST		= 4,
+	BDB_GENERIC_MODE_TABLE		= 5,
+	BDB_EXT_MMIO_REGS		= 6,
+	BDB_SWF_IO			= 7,
+	BDB_SWF_MMIO			= 8,
+	BDB_PSR				= 9,
+	BDB_MODE_REMOVAL_TABLE		= 10,
+	BDB_CHILD_DEVICE_TABLE		= 11,
+	BDB_DRIVER_FEATURES		= 12,
+	BDB_DRIVER_PERSISTENCE		= 13,
+	BDB_EXT_TABLE_PTRS		= 14,
+	BDB_DOT_CLOCK_OVERRIDE		= 15,
+	BDB_DISPLAY_SELECT		= 16,
+	BDB_DRIVER_ROTATION		= 18,
+	BDB_DISPLAY_REMOVE		= 19,
+	BDB_OEM_CUSTOM			= 20,
+	BDB_EFP_LIST			= 21, /* workarounds for VGA hsync/vsync */
+	BDB_SDVO_LVDS_OPTIONS		= 22,
+	BDB_SDVO_PANEL_DTDS		= 23,
+	BDB_SDVO_LVDS_PNP_IDS		= 24,
+	BDB_SDVO_LVDS_POWER_SEQ		= 25,
+	BDB_TV_OPTIONS			= 26,
+	BDB_EDP				= 27,
+	BDB_LVDS_OPTIONS		= 40,
+	BDB_LVDS_LFP_DATA_PTRS		= 41,
+	BDB_LVDS_LFP_DATA		= 42,
+	BDB_LVDS_BACKLIGHT		= 43,
+	BDB_LVDS_POWER			= 44,
+	BDB_MIPI_CONFIG			= 52,
+	BDB_MIPI_SEQUENCE		= 53,
+	BDB_SKIP			= 254, /* VBIOS private block, ignore */
+};
+
+/*
+ * Block 1 - General Bit Definitions
+ */
+
+struct bdb_general_features {
+        /* bits 1 */
+	u8 panel_fitting:2;
+	u8 flexaim:1;
+	u8 msg_enable:1;
+	u8 clear_screen:3;
+	u8 color_flip:1;
+
+        /* bits 2 */
+	u8 download_ext_vbt:1;
+	u8 enable_ssc:1;
+	u8 ssc_freq:1;
+	u8 enable_lfp_on_override:1;
+	u8 disable_ssc_ddt:1;
+	u8 underscan_vga_timings:1;
+	u8 display_clock_mode:1;
+	u8 vbios_hotplug_support:1;
+
+        /* bits 3 */
+	u8 disable_smooth_vision:1;
+	u8 single_dvi:1;
+	u8 rotate_180:1;					/* 181 */
+	u8 fdi_rx_polarity_inverted:1;
+	u8 vbios_extended_mode:1;				/* 160 */
+	u8 copy_ilfp_dtd_to_sdvo_lvds_dtd:1;			/* 160 */
+	u8 panel_best_fit_timing:1;				/* 160 */
+	u8 ignore_strap_state:1;				/* 160 */
+
+        /* bits 4 */
+	u8 legacy_monitor_detect;
+
+        /* bits 5 */
+	u8 int_crt_support:1;
+	u8 int_tv_support:1;
+	u8 int_efp_support:1;
+	u8 dp_ssc_enable:1;	/* PCH attached eDP supports SSC */
+	u8 dp_ssc_freq:1;	/* SSC freq for PCH attached eDP */
+	u8 dp_ssc_dongle_supported:1;
+	u8 rsvd11:2; /* finish byte */
+} __packed;
+
+/*
+ * Block 2 - General Bytes Definition
+ */
+
+/* pre-915 */
+#define GPIO_PIN_DVI_LVDS	0x03 /* "DVI/LVDS DDC GPIO pins" */
+#define GPIO_PIN_ADD_I2C	0x05 /* "ADDCARD I2C GPIO pins" */
+#define GPIO_PIN_ADD_DDC	0x04 /* "ADDCARD DDC GPIO pins" */
+#define GPIO_PIN_ADD_DDC_I2C	0x06 /* "ADDCARD DDC/I2C GPIO pins" */
+
+/* Pre 915 */
+#define DEVICE_TYPE_NONE	0x00
+#define DEVICE_TYPE_CRT		0x01
+#define DEVICE_TYPE_TV		0x09
+#define DEVICE_TYPE_EFP		0x12
+#define DEVICE_TYPE_LFP		0x22
+/* On 915+ */
+#define DEVICE_TYPE_CRT_DPMS		0x6001
+#define DEVICE_TYPE_CRT_DPMS_HOTPLUG	0x4001
+#define DEVICE_TYPE_TV_COMPOSITE	0x0209
+#define DEVICE_TYPE_TV_MACROVISION	0x0289
+#define DEVICE_TYPE_TV_RF_COMPOSITE	0x020c
+#define DEVICE_TYPE_TV_SVIDEO_COMPOSITE	0x0609
+#define DEVICE_TYPE_TV_SCART		0x0209
+#define DEVICE_TYPE_TV_CODEC_HOTPLUG_PWR 0x6009
+#define DEVICE_TYPE_EFP_HOTPLUG_PWR	0x6012
+#define DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR	0x6052
+#define DEVICE_TYPE_EFP_DVI_I		0x6053
+#define DEVICE_TYPE_EFP_DVI_D_DUAL	0x6152
+#define DEVICE_TYPE_EFP_DVI_D_HDCP	0x60d2
+#define DEVICE_TYPE_OPENLDI_HOTPLUG_PWR	0x6062
+#define DEVICE_TYPE_OPENLDI_DUALPIX	0x6162
+#define DEVICE_TYPE_LFP_PANELLINK	0x5012
+#define DEVICE_TYPE_LFP_CMOS_PWR	0x5042
+#define DEVICE_TYPE_LFP_LVDS_PWR	0x5062
+#define DEVICE_TYPE_LFP_LVDS_DUAL	0x5162
+#define DEVICE_TYPE_LFP_LVDS_DUAL_HDCP	0x51e2
+
+/* Add the device class for LFP, TV, HDMI */
+#define DEVICE_TYPE_INT_LFP		0x1022
+#define DEVICE_TYPE_INT_TV		0x1009
+#define DEVICE_TYPE_HDMI		0x60D2
+#define DEVICE_TYPE_DP			0x68C6
+#define DEVICE_TYPE_DP_DUAL_MODE	0x60D6
+#define DEVICE_TYPE_eDP			0x78C6
+
+#define DEVICE_TYPE_CLASS_EXTENSION	(1 << 15)
+#define DEVICE_TYPE_POWER_MANAGEMENT	(1 << 14)
+#define DEVICE_TYPE_HOTPLUG_SIGNALING	(1 << 13)
+#define DEVICE_TYPE_INTERNAL_CONNECTOR	(1 << 12)
+#define DEVICE_TYPE_NOT_HDMI_OUTPUT	(1 << 11)
+#define DEVICE_TYPE_MIPI_OUTPUT		(1 << 10)
+#define DEVICE_TYPE_COMPOSITE_OUTPUT	(1 << 9)
+#define DEVICE_TYPE_DUAL_CHANNEL	(1 << 8)
+#define DEVICE_TYPE_HIGH_SPEED_LINK	(1 << 6)
+#define DEVICE_TYPE_LVDS_SIGNALING	(1 << 5)
+#define DEVICE_TYPE_TMDS_DVI_SIGNALING	(1 << 4)
+#define DEVICE_TYPE_VIDEO_SIGNALING	(1 << 3)
+#define DEVICE_TYPE_DISPLAYPORT_OUTPUT	(1 << 2)
+#define DEVICE_TYPE_DIGITAL_OUTPUT	(1 << 1)
+#define DEVICE_TYPE_ANALOG_OUTPUT	(1 << 0)
+
+/*
+ * Bits we care about when checking for DEVICE_TYPE_eDP. Depending on the
+ * system, the other bits may or may not be set for eDP outputs.
+ */
+#define DEVICE_TYPE_eDP_BITS \
+	(DEVICE_TYPE_INTERNAL_CONNECTOR |	\
+	 DEVICE_TYPE_MIPI_OUTPUT |		\
+	 DEVICE_TYPE_COMPOSITE_OUTPUT |		\
+	 DEVICE_TYPE_DUAL_CHANNEL |		\
+	 DEVICE_TYPE_LVDS_SIGNALING |		\
+	 DEVICE_TYPE_TMDS_DVI_SIGNALING |	\
+	 DEVICE_TYPE_VIDEO_SIGNALING |		\
+	 DEVICE_TYPE_DISPLAYPORT_OUTPUT |	\
+	 DEVICE_TYPE_ANALOG_OUTPUT)
+
+#define DEVICE_TYPE_DP_DUAL_MODE_BITS \
+	(DEVICE_TYPE_INTERNAL_CONNECTOR |	\
+	 DEVICE_TYPE_MIPI_OUTPUT |		\
+	 DEVICE_TYPE_COMPOSITE_OUTPUT |		\
+	 DEVICE_TYPE_LVDS_SIGNALING |		\
+	 DEVICE_TYPE_TMDS_DVI_SIGNALING |	\
+	 DEVICE_TYPE_VIDEO_SIGNALING |		\
+	 DEVICE_TYPE_DISPLAYPORT_OUTPUT |	\
+	 DEVICE_TYPE_DIGITAL_OUTPUT |		\
+	 DEVICE_TYPE_ANALOG_OUTPUT)
+
+#define DEVICE_CFG_NONE		0x00
+#define DEVICE_CFG_12BIT_DVOB	0x01
+#define DEVICE_CFG_12BIT_DVOC	0x02
+#define DEVICE_CFG_24BIT_DVOBC	0x09
+#define DEVICE_CFG_24BIT_DVOCB	0x0a
+#define DEVICE_CFG_DUAL_DVOB	0x11
+#define DEVICE_CFG_DUAL_DVOC	0x12
+#define DEVICE_CFG_DUAL_DVOBC	0x13
+#define DEVICE_CFG_DUAL_LINK_DVOBC	0x19
+#define DEVICE_CFG_DUAL_LINK_DVOCB	0x1a
+
+#define DEVICE_WIRE_NONE	0x00
+#define DEVICE_WIRE_DVOB	0x01
+#define DEVICE_WIRE_DVOC	0x02
+#define DEVICE_WIRE_DVOBC	0x03
+#define DEVICE_WIRE_DVOBB	0x05
+#define DEVICE_WIRE_DVOCC	0x06
+#define DEVICE_WIRE_DVOB_MASTER 0x0d
+#define DEVICE_WIRE_DVOC_MASTER 0x0e
+
+/* dvo_port pre BDB 155 */
+#define DEVICE_PORT_DVOA	0x00 /* none on 845+ */
+#define DEVICE_PORT_DVOB	0x01
+#define DEVICE_PORT_DVOC	0x02
+
+/* dvo_port BDB 155+ */
+#define DVO_PORT_HDMIA		0
+#define DVO_PORT_HDMIB		1
+#define DVO_PORT_HDMIC		2
+#define DVO_PORT_HDMID		3
+#define DVO_PORT_LVDS		4
+#define DVO_PORT_TV		5
+#define DVO_PORT_CRT		6
+#define DVO_PORT_DPB		7
+#define DVO_PORT_DPC		8
+#define DVO_PORT_DPD		9
+#define DVO_PORT_DPA		10
+#define DVO_PORT_DPE		11				/* 193 */
+#define DVO_PORT_HDMIE		12				/* 193 */
+#define DVO_PORT_DPF		13				/* N/A */
+#define DVO_PORT_HDMIF		14				/* N/A */
+#define DVO_PORT_MIPIA		21				/* 171 */
+#define DVO_PORT_MIPIB		22				/* 171 */
+#define DVO_PORT_MIPIC		23				/* 171 */
+#define DVO_PORT_MIPID		24				/* 171 */
+
+#define HDMI_MAX_DATA_RATE_PLATFORM	0			/* 204 */
+#define HDMI_MAX_DATA_RATE_297		1			/* 204 */
+#define HDMI_MAX_DATA_RATE_165		2			/* 204 */
+
+#define LEGACY_CHILD_DEVICE_CONFIG_SIZE		33
+
+/* DDC Bus DDI Type 155+ */
+enum vbt_gmbus_ddi {
+	DDC_BUS_DDI_B = 0x1,
+	DDC_BUS_DDI_C,
+	DDC_BUS_DDI_D,
+	DDC_BUS_DDI_F,
+	ICL_DDC_BUS_DDI_A = 0x1,
+	ICL_DDC_BUS_DDI_B,
+	ICL_DDC_BUS_PORT_1 = 0x4,
+	ICL_DDC_BUS_PORT_2,
+	ICL_DDC_BUS_PORT_3,
+	ICL_DDC_BUS_PORT_4,
+};
+
+#define DP_AUX_A 0x40
+#define DP_AUX_B 0x10
+#define DP_AUX_C 0x20
+#define DP_AUX_D 0x30
+#define DP_AUX_E 0x50
+#define DP_AUX_F 0x60
+
+#define VBT_DP_MAX_LINK_RATE_HBR3	0
+#define VBT_DP_MAX_LINK_RATE_HBR2	1
+#define VBT_DP_MAX_LINK_RATE_HBR	2
+#define VBT_DP_MAX_LINK_RATE_LBR	3
+
+/*
+ * The child device config, aka the display device data structure, provides a
+ * description of a port and its configuration on the platform.
+ *
+ * The child device config size has been increased, and fields have been added
+ * and their meaning has changed over time. Care must be taken when accessing
+ * basically any of the fields to ensure the correct interpretation for the BDB
+ * version in question.
+ *
+ * When we copy the child device configs to dev_priv->vbt.child_dev, we reserve
+ * space for the full structure below, and initialize the tail not actually
+ * present in VBT to zeros. Accessing those fields is fine, as long as the
+ * default zero is taken into account, again according to the BDB version.
+ *
+ * BDB versions 155 and below are considered legacy, and version 155 seems to be
+ * a baseline for some of the VBT documentation. When adding new fields, please
+ * include the BDB version when the field was added, if it's above that.
+ */
+struct child_device_config {
+	u16 handle;
+	u16 device_type; /* See DEVICE_TYPE_* above */
+
+	union {
+		u8  device_id[10]; /* ascii string */
+		struct {
+			u8 i2c_speed;
+			u8 dp_onboard_redriver;			/* 158 */
+			u8 dp_ondock_redriver;			/* 158 */
+			u8 hdmi_level_shifter_value:5;		/* 169 */
+			u8 hdmi_max_data_rate:3;		/* 204 */
+			u16 dtd_buf_ptr;			/* 161 */
+			u8 edidless_efp:1;			/* 161 */
+			u8 compression_enable:1;		/* 198 */
+			u8 compression_method:1;		/* 198 */
+			u8 ganged_edp:1;			/* 202 */
+			u8 reserved0:4;
+			u8 compression_structure_index:4;	/* 198 */
+			u8 reserved1:4;
+			u8 slave_port;				/* 202 */
+			u8 reserved2;
+		} __packed;
+	} __packed;
+
+	u16 addin_offset;
+	u8 dvo_port; /* See DEVICE_PORT_* and DVO_PORT_* above */
+	u8 i2c_pin;
+	u8 slave_addr;
+	u8 ddc_pin;
+	u16 edid_ptr;
+	u8 dvo_cfg; /* See DEVICE_CFG_* above */
+
+	union {
+		struct {
+			u8 dvo2_port;
+			u8 i2c2_pin;
+			u8 slave2_addr;
+			u8 ddc2_pin;
+		} __packed;
+		struct {
+			u8 efp_routed:1;			/* 158 */
+			u8 lane_reversal:1;			/* 184 */
+			u8 lspcon:1;				/* 192 */
+			u8 iboost:1;				/* 196 */
+			u8 hpd_invert:1;			/* 196 */
+			u8 use_vbt_vswing:1;			/* 218 */
+			u8 flag_reserved:2;
+			u8 hdmi_support:1;			/* 158 */
+			u8 dp_support:1;			/* 158 */
+			u8 tmds_support:1;			/* 158 */
+			u8 support_reserved:5;
+			u8 aux_channel;
+			u8 dongle_detect;
+		} __packed;
+	} __packed;
+
+	u8 pipe_cap:2;
+	u8 sdvo_stall:1;					/* 158 */
+	u8 hpd_status:2;
+	u8 integrated_encoder:1;
+	u8 capabilities_reserved:2;
+	u8 dvo_wiring; /* See DEVICE_WIRE_* above */
+
+	union {
+		u8 dvo2_wiring;
+		u8 mipi_bridge_type;				/* 171 */
+	} __packed;
+
+	u16 extended_type;
+	u8 dvo_function;
+	u8 dp_usb_type_c:1;					/* 195 */
+	u8 tbt:1;						/* 209 */
+	u8 flags2_reserved:2;					/* 195 */
+	u8 dp_port_trace_length:4;				/* 209 */
+	u8 dp_gpio_index;					/* 195 */
+	u16 dp_gpio_pin_num;					/* 195 */
+	u8 dp_iboost_level:4;					/* 196 */
+	u8 hdmi_iboost_level:4;					/* 196 */
+	u8 dp_max_link_rate:2;					/* 216 CNL+ */
+	u8 dp_max_link_rate_reserved:6;				/* 216 */
+} __packed;
+
+struct bdb_general_definitions {
+	/* DDC GPIO */
+	u8 crt_ddc_gmbus_pin;
+
+	/* DPMS bits */
+	u8 dpms_acpi:1;
+	u8 skip_boot_crt_detect:1;
+	u8 dpms_aim:1;
+	u8 rsvd1:5; /* finish byte */
+
+	/* boot device bits */
+	u8 boot_display[2];
+	u8 child_dev_size;
+
+	/*
+	 * Device info:
+	 * If TV is present, it'll be at devices[0].
+	 * LVDS will be next, either devices[0] or [1], if present.
+	 * On some platforms the number of device is 6. But could be as few as
+	 * 4 if both TV and LVDS are missing.
+	 * And the device num is related with the size of general definition
+	 * block. It is obtained by using the following formula:
+	 * number = (block_size - sizeof(bdb_general_definitions))/
+	 *	     defs->child_dev_size;
+	 */
+	u8 devices[0];
+} __packed;
+
+/*
+ * Block 9 - SRD Feature Block
+ */
+
+struct psr_table {
+	/* Feature bits */
+	u8 full_link:1;
+	u8 require_aux_to_wakeup:1;
+	u8 feature_bits_rsvd:6;
+
+	/* Wait times */
+	u8 idle_frames:4;
+	u8 lines_to_wait:3;
+	u8 wait_times_rsvd:1;
+
+	/* TP wake up time in multiple of 100 */
+	u16 tp1_wakeup_time;
+	u16 tp2_tp3_wakeup_time;
+
+	/* PSR2 TP2/TP3 wakeup time for 16 panels */
+	u32 psr2_tp2_tp3_wakeup_time;
+} __packed;
+
+struct bdb_psr {
+	struct psr_table psr_table[16];
+} __packed;
+
+/*
+ * Block 12 - Driver Features Data Block
+ */
+
+#define BDB_DRIVER_FEATURE_NO_LVDS		0
+#define BDB_DRIVER_FEATURE_INT_LVDS		1
+#define BDB_DRIVER_FEATURE_SDVO_LVDS		2
+#define BDB_DRIVER_FEATURE_INT_SDVO_LVDS	3
+
+struct bdb_driver_features {
+	u8 boot_dev_algorithm:1;
+	u8 block_display_switch:1;
+	u8 allow_display_switch:1;
+	u8 hotplug_dvo:1;
+	u8 dual_view_zoom:1;
+	u8 int15h_hook:1;
+	u8 sprite_in_clone:1;
+	u8 primary_lfp_id:1;
+
+	u16 boot_mode_x;
+	u16 boot_mode_y;
+	u8 boot_mode_bpp;
+	u8 boot_mode_refresh;
+
+	u16 enable_lfp_primary:1;
+	u16 selective_mode_pruning:1;
+	u16 dual_frequency:1;
+	u16 render_clock_freq:1; /* 0: high freq; 1: low freq */
+	u16 nt_clone_support:1;
+	u16 power_scheme_ui:1; /* 0: CUI; 1: 3rd party */
+	u16 sprite_display_assign:1; /* 0: secondary; 1: primary */
+	u16 cui_aspect_scaling:1;
+	u16 preserve_aspect_ratio:1;
+	u16 sdvo_device_power_down:1;
+	u16 crt_hotplug:1;
+	u16 lvds_config:2;
+	u16 tv_hotplug:1;
+	u16 hdmi_config:2;
+
+	u8 static_display:1;
+	u8 reserved2:7;
+	u16 legacy_crt_max_x;
+	u16 legacy_crt_max_y;
+	u8 legacy_crt_max_refresh;
+
+	u8 hdmi_termination;
+	u8 custom_vbt_version;
+	/* Driver features data block */
+	u16 rmpm_enabled:1;
+	u16 s2ddt_enabled:1;
+	u16 dpst_enabled:1;
+	u16 bltclt_enabled:1;
+	u16 adb_enabled:1;
+	u16 drrs_enabled:1;
+	u16 grs_enabled:1;
+	u16 gpmt_enabled:1;
+	u16 tbt_enabled:1;
+	u16 psr_enabled:1;
+	u16 ips_enabled:1;
+	u16 reserved3:4;
+	u16 pc_feature_valid:1;
+} __packed;
+
+/*
+ * Block 22 - SDVO LVDS General Options
+ */
+
+struct bdb_sdvo_lvds_options {
+	u8 panel_backlight;
+	u8 h40_set_panel_type;
+	u8 panel_type;
+	u8 ssc_clk_freq;
+	u16 als_low_trip;
+	u16 als_high_trip;
+	u8 sclalarcoeff_tab_row_num;
+	u8 sclalarcoeff_tab_row_size;
+	u8 coefficient[8];
+	u8 panel_misc_bits_1;
+	u8 panel_misc_bits_2;
+	u8 panel_misc_bits_3;
+	u8 panel_misc_bits_4;
+} __packed;
+
+/*
+ * Block 23 - SDVO LVDS Panel DTDs
+ */
+
+struct lvds_dvo_timing {
+	u16 clock;		/**< In 10khz */
+	u8 hactive_lo;
+	u8 hblank_lo;
+	u8 hblank_hi:4;
+	u8 hactive_hi:4;
+	u8 vactive_lo;
+	u8 vblank_lo;
+	u8 vblank_hi:4;
+	u8 vactive_hi:4;
+	u8 hsync_off_lo;
+	u8 hsync_pulse_width_lo;
+	u8 vsync_pulse_width_lo:4;
+	u8 vsync_off_lo:4;
+	u8 vsync_pulse_width_hi:2;
+	u8 vsync_off_hi:2;
+	u8 hsync_pulse_width_hi:2;
+	u8 hsync_off_hi:2;
+	u8 himage_lo;
+	u8 vimage_lo;
+	u8 vimage_hi:4;
+	u8 himage_hi:4;
+	u8 h_border;
+	u8 v_border;
+	u8 rsvd1:3;
+	u8 digital:2;
+	u8 vsync_positive:1;
+	u8 hsync_positive:1;
+	u8 non_interlaced:1;
+} __packed;
+
+struct bdb_sdvo_panel_dtds {
+	struct lvds_dvo_timing dtds[4];
+} __packed;
+
+/*
+ * Block 27 - eDP VBT Block
+ */
+
+#define EDP_18BPP	0
+#define EDP_24BPP	1
+#define EDP_30BPP	2
+#define EDP_RATE_1_62	0
+#define EDP_RATE_2_7	1
+#define EDP_LANE_1	0
+#define EDP_LANE_2	1
+#define EDP_LANE_4	3
+#define EDP_PREEMPHASIS_NONE	0
+#define EDP_PREEMPHASIS_3_5dB	1
+#define EDP_PREEMPHASIS_6dB	2
+#define EDP_PREEMPHASIS_9_5dB	3
+#define EDP_VSWING_0_4V		0
+#define EDP_VSWING_0_6V		1
+#define EDP_VSWING_0_8V		2
+#define EDP_VSWING_1_2V		3
+
+
+struct edp_fast_link_params {
+	u8 rate:4;
+	u8 lanes:4;
+	u8 preemphasis:4;
+	u8 vswing:4;
+} __packed;
+
+struct edp_pwm_delays {
+	u16 pwm_on_to_backlight_enable;
+	u16 backlight_disable_to_pwm_off;
+} __packed;
+
+struct edp_full_link_params {
+	u8 preemphasis:4;
+	u8 vswing:4;
+} __packed;
+
+struct bdb_edp {
+	struct edp_power_seq power_seqs[16];
+	u32 color_depth;
+	struct edp_fast_link_params fast_link_params[16];
+	u32 sdrrs_msa_timing_delay;
+
+	/* ith bit indicates enabled/disabled for (i+1)th panel */
+	u16 edp_s3d_feature;					/* 162 */
+	u16 edp_t3_optimization;				/* 165 */
+	u64 edp_vswing_preemph;					/* 173 */
+	u16 fast_link_training;					/* 182 */
+	u16 dpcd_600h_write_required;				/* 185 */
+	struct edp_pwm_delays pwm_delays[16];			/* 186 */
+	u16 full_link_params_provided;				/* 199 */
+	struct edp_full_link_params full_link_params[16];	/* 199 */
+} __packed;
+
+/*
+ * Block 40 - LFP Data Block
+ */
+
+/* Mask for DRRS / Panel Channel / SSC / BLT control bits extraction */
+#define MODE_MASK		0x3
+
+struct bdb_lvds_options {
+	u8 panel_type;
+	u8 panel_type2;						/* 212 */
+	/* LVDS capabilities, stored in a dword */
+	u8 pfit_mode:2;
+	u8 pfit_text_mode_enhanced:1;
+	u8 pfit_gfx_mode_enhanced:1;
+	u8 pfit_ratio_auto:1;
+	u8 pixel_dither:1;
+	u8 lvds_edid:1;
+	u8 rsvd2:1;
+	u8 rsvd4;
+	/* LVDS Panel channel bits stored here */
+	u32 lvds_panel_channel_bits;
+	/* LVDS SSC (Spread Spectrum Clock) bits stored here. */
+	u16 ssc_bits;
+	u16 ssc_freq;
+	u16 ssc_ddt;
+	/* Panel color depth defined here */
+	u16 panel_color_depth;
+	/* LVDS panel type bits stored here */
+	u32 dps_panel_type_bits;
+	/* LVDS backlight control type bits stored here */
+	u32 blt_control_type_bits;
+
+	u16 lcdvcc_s0_enable;					/* 200 */
+	u32 rotation;						/* 228 */
+} __packed;
+
+/*
+ * Block 41 - LFP Data Table Pointers
+ */
+
+/* LFP pointer table contains entries to the struct below */
+struct lvds_lfp_data_ptr {
+	u16 fp_timing_offset; /* offsets are from start of bdb */
+	u8 fp_table_size;
+	u16 dvo_timing_offset;
+	u8 dvo_table_size;
+	u16 panel_pnp_id_offset;
+	u8 pnp_table_size;
+} __packed;
+
+struct bdb_lvds_lfp_data_ptrs {
+	u8 lvds_entries; /* followed by one or more lvds_data_ptr structs */
+	struct lvds_lfp_data_ptr ptr[16];
+} __packed;
+
+/*
+ * Block 42 - LFP Data Tables
+ */
+
+/* LFP data has 3 blocks per entry */
+struct lvds_fp_timing {
+	u16 x_res;
+	u16 y_res;
+	u32 lvds_reg;
+	u32 lvds_reg_val;
+	u32 pp_on_reg;
+	u32 pp_on_reg_val;
+	u32 pp_off_reg;
+	u32 pp_off_reg_val;
+	u32 pp_cycle_reg;
+	u32 pp_cycle_reg_val;
+	u32 pfit_reg;
+	u32 pfit_reg_val;
+	u16 terminator;
+} __packed;
+
+struct lvds_pnp_id {
+	u16 mfg_name;
+	u16 product_code;
+	u32 serial;
+	u8 mfg_week;
+	u8 mfg_year;
+} __packed;
+
+struct lvds_lfp_data_entry {
+	struct lvds_fp_timing fp_timing;
+	struct lvds_dvo_timing dvo_timing;
+	struct lvds_pnp_id pnp_id;
+} __packed;
+
+struct bdb_lvds_lfp_data {
+	struct lvds_lfp_data_entry data[16];
+} __packed;
+
+/*
+ * Block 43 - LFP Backlight Control Data Block
+ */
+
+#define BDB_BACKLIGHT_TYPE_NONE	0
+#define BDB_BACKLIGHT_TYPE_PWM	2
+
+struct lfp_backlight_data_entry {
+	u8 type:2;
+	u8 active_low_pwm:1;
+	u8 obsolete1:5;
+	u16 pwm_freq_hz;
+	u8 min_brightness;
+	u8 obsolete2;
+	u8 obsolete3;
+} __packed;
+
+struct lfp_backlight_control_method {
+	u8 type:4;
+	u8 controller:4;
+} __packed;
+
+struct bdb_lfp_backlight_data {
+	u8 entry_size;
+	struct lfp_backlight_data_entry data[16];
+	u8 level[16];
+	struct lfp_backlight_control_method backlight_control[16];
+} __packed;
+
+/*
+ * Block 52 - MIPI Configuration Block
+ */
+
+#define MAX_MIPI_CONFIGURATIONS	6
+
+struct bdb_mipi_config {
+	struct mipi_config config[MAX_MIPI_CONFIGURATIONS];
+	struct mipi_pps_data pps[MAX_MIPI_CONFIGURATIONS];
+} __packed;
+
+/*
+ * Block 53 - MIPI Sequence Block
+ */
+
+struct bdb_mipi_sequence {
+	u8 version;
+	u8 data[0]; /* up to 6 variable length blocks */
+} __packed;
+
+#endif /* _INTEL_VBT_DEFS_H_ */