From 867cf9cd73c3d31666e4b480aa4f52828d25ac94 Mon Sep 17 00:00:00 2001 From: Lyude Paul Date: Fri, 14 May 2021 14:15:02 -0400 Subject: drm/dp: Extract i915's eDP backlight code into DRM helpers Since we're about to implement eDP backlight support in nouveau using the standard protocol from VESA, we might as well just take the code that's already written for this and move it into a set of shared DRM helpers. Note that these helpers are intended to handle DPCD related backlight control bits such as setting the brightness level over AUX, probing the backlight's TCON, enabling/disabling the backlight over AUX if supported, etc. Any PWM-related portions of backlight control are explicitly left up to the driver, as these will vary from platform to platform. The only exception to this is the calculation of the PWM frequency pre-divider value. This is because the only platform-specific information required for this is the PWM frequency of the panel, which the driver is expected to provide if available. The actual algorithm for calculating this value is standard and is defined in the eDP specification from VESA. Note that these helpers do not yet implement the full range of features the VESA backlight interface provides, and only provide the following functionality (all of which was already present in i915's DPCD backlight support): * Basic control of brightness levels * Basic probing of backlight capabilities * Helpers for enabling and disabling the backlight v3: * Split out changes to i915's backlight code to separate patches to make it easier to review v4: * Style/spelling changes from Thomas Zimmermann v5: * Start using new drm_dbg_*() functions Signed-off-by: Lyude Paul Cc: Jani Nikula Cc: Dave Airlie Cc: greg.depoire@gmail.com Reviewed-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20210514181504.565252-9-lyude@redhat.com --- include/drm/drm_dp_helper.h | 48 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'include/drm') diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 06681bf46d81..0bd6396648b4 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1801,6 +1801,24 @@ drm_dp_sink_can_do_video_without_timing_msa(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) DP_MSA_TIMING_PAR_IGNORED; } +/** + * drm_edp_backlight_supported() - Check an eDP DPCD for VESA backlight support + * @edp_dpcd: The DPCD to check + * + * Note that currently this function will return %false for panels which support various DPCD + * backlight features but which require the brightness be set through PWM, and don't support setting + * the brightness level via the DPCD. This is a TODO. + * + * Returns: %True if @edp_dpcd indicates that VESA backlight controls are supported, %false + * otherwise + */ +static inline bool +drm_edp_backlight_supported(const u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE]) +{ + return (edp_dpcd[1] & DP_EDP_TCON_BACKLIGHT_ADJUSTMENT_CAP) && + (edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP); +} + /* * DisplayPort AUX channel */ @@ -2107,6 +2125,36 @@ drm_dp_has_quirk(const struct drm_dp_desc *desc, enum drm_dp_quirk quirk) return desc->quirks & BIT(quirk); } +/** + * struct drm_edp_backlight_info - Probed eDP backlight info struct + * @pwmgen_bit_count: The pwmgen bit count + * @pwm_freq_pre_divider: The PWM frequency pre-divider value being used for this backlight, if any + * @max: The maximum backlight level that may be set + * @lsb_reg_used: Do we also write values to the DP_EDP_BACKLIGHT_BRIGHTNESS_LSB register? + * @aux_enable: Does the panel support the AUX enable cap? + * + * This structure contains various data about an eDP backlight, which can be populated by using + * drm_edp_backlight_init(). + */ +struct drm_edp_backlight_info { + u8 pwmgen_bit_count; + u8 pwm_freq_pre_divider; + u16 max; + + bool lsb_reg_used : 1; + bool aux_enable : 1; +}; + +int +drm_edp_backlight_init(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl, + u16 driver_pwm_freq_hz, const u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE], + u16 *current_level, u8 *current_mode); +int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl, + u16 level); +int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl, + u16 level); +int drm_edp_backlight_disable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl); + #ifdef CONFIG_DRM_DP_CEC void drm_dp_cec_irq(struct drm_dp_aux *aux); void drm_dp_cec_register_connector(struct drm_dp_aux *aux, -- cgit v1.2.3 From aeb33699fc2c97994de0e9acb74d0fd319380614 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Fri, 11 Jun 2021 10:17:40 -0700 Subject: drm: Introduce the DP AUX bus Historically "simple" eDP panels have been handled by panel-simple which is a basic platform_device. In the device tree, the panel node was at the top level and not connected to anything else. Let's change it so that, instead, panels can be represented as being children of the "DP AUX bus". Essentially we're saying that the hierarchy that we're going to represent is the "control" connections between devices. The DP AUX bus is a control bus provided by an eDP controller (the parent) and consumed by a device like a panel (the child). The primary incentive here is to cleanly provide the panel driver the ability to communicate over the AUX bus while handling lifetime issues properly. The panel driver may want the AUX bus for controlling the backlight or querying the panel's EDID. The idea for this bus's design was hashed out over IRC [1]. [1] https://people.freedesktop.org/~cbrill/dri-log/?channel=dri-devel&date=2021-05-11 Cc: Laurent Pinchart Cc: Lyude Paul Cc: Rajeev Nandan Suggested-by: Laurent Pinchart Signed-off-by: Douglas Anderson Acked-by: Linus Walleij Reviewed-by: Lyude Paul Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.4.I787c9ba09ed5ce12500326ded73a4f7c9265b1b3@changeid --- drivers/gpu/drm/Kconfig | 5 + drivers/gpu/drm/Makefile | 2 + drivers/gpu/drm/drm_dp_aux_bus.c | 326 +++++++++++++++++++++++++++++++++++++++ include/drm/drm_dp_aux_bus.h | 57 +++++++ 4 files changed, 390 insertions(+) create mode 100644 drivers/gpu/drm/drm_dp_aux_bus.c create mode 100644 include/drm/drm_dp_aux_bus.h (limited to 'include/drm') diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 7ff89690a976..1366d8d4610a 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -35,6 +35,11 @@ config DRM_MIPI_DSI bool depends on DRM +config DRM_DP_AUX_BUS + tristate + depends on DRM + depends on OF + config DRM_DP_AUX_CHARDEV bool "DRM DP AUX Interface" depends on DRM diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index a118692a6df7..12e6f4e485ed 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -33,6 +33,8 @@ drm-$(CONFIG_PCI) += drm_pci.o drm-$(CONFIG_DEBUG_FS) += drm_debugfs.o drm_debugfs_crc.o drm-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o +obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o + drm_vram_helper-y := drm_gem_vram_helper.o obj-$(CONFIG_DRM_VRAM_HELPER) += drm_vram_helper.o diff --git a/drivers/gpu/drm/drm_dp_aux_bus.c b/drivers/gpu/drm/drm_dp_aux_bus.c new file mode 100644 index 000000000000..e49a70f3691b --- /dev/null +++ b/drivers/gpu/drm/drm_dp_aux_bus.c @@ -0,0 +1,326 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2021 Google Inc. + * + * The DP AUX bus is used for devices that are connected over a DisplayPort + * AUX bus. The devices on the far side of the bus are referred to as + * endpoints in this code. + * + * Commonly there is only one device connected to the DP AUX bus: a panel. + * Though historically panels (even DP panels) have been modeled as simple + * platform devices, putting them under the DP AUX bus allows the panel driver + * to perform transactions on that bus. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +/** + * dp_aux_ep_match() - The match function for the dp_aux_bus. + * @dev: The device to match. + * @drv: The driver to try to match against. + * + * At the moment, we just match on device tree. + * + * Return: True if this driver matches this device; false otherwise. + */ +static int dp_aux_ep_match(struct device *dev, struct device_driver *drv) +{ + return !!of_match_device(drv->of_match_table, dev); +} + +/** + * dp_aux_ep_probe() - The probe function for the dp_aux_bus. + * @dev: The device to probe. + * + * Calls through to the endpoint driver probe. + * + * Return: 0 if no error or negative error code. + */ +static int dp_aux_ep_probe(struct device *dev) +{ + struct dp_aux_ep_driver *aux_ep_drv = to_dp_aux_ep_drv(dev->driver); + struct dp_aux_ep_device *aux_ep = to_dp_aux_ep_dev(dev); + int ret; + + ret = dev_pm_domain_attach(dev, true); + if (ret) + return dev_err_probe(dev, ret, "Failed to attach to PM Domain\n"); + + ret = aux_ep_drv->probe(aux_ep); + if (ret) + dev_pm_domain_detach(dev, true); + + return ret; +} + +/** + * dp_aux_ep_remove() - The remove function for the dp_aux_bus. + * @dev: The device to remove. + * + * Calls through to the endpoint driver remove. + * + * Return: 0 if no error or negative error code. + */ +static int dp_aux_ep_remove(struct device *dev) +{ + struct dp_aux_ep_driver *aux_ep_drv = to_dp_aux_ep_drv(dev->driver); + struct dp_aux_ep_device *aux_ep = to_dp_aux_ep_dev(dev); + + if (aux_ep_drv->remove) + aux_ep_drv->remove(aux_ep); + dev_pm_domain_detach(dev, true); + + return 0; +} + +/** + * dp_aux_ep_shutdown() - The shutdown function for the dp_aux_bus. + * @dev: The device to shutdown. + * + * Calls through to the endpoint driver shutdown. + */ +static void dp_aux_ep_shutdown(struct device *dev) +{ + struct dp_aux_ep_driver *aux_ep_drv; + + if (!dev->driver) + return; + + aux_ep_drv = to_dp_aux_ep_drv(dev->driver); + if (aux_ep_drv->shutdown) + aux_ep_drv->shutdown(to_dp_aux_ep_dev(dev)); +} + +static struct bus_type dp_aux_bus_type = { + .name = "dp-aux", + .match = dp_aux_ep_match, + .probe = dp_aux_ep_probe, + .remove = dp_aux_ep_remove, + .shutdown = dp_aux_ep_shutdown, +}; + +static ssize_t modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return of_device_modalias(dev, buf, PAGE_SIZE); +} +static DEVICE_ATTR_RO(modalias); + +static struct attribute *dp_aux_ep_dev_attrs[] = { + &dev_attr_modalias.attr, + NULL, +}; +ATTRIBUTE_GROUPS(dp_aux_ep_dev); + +/** + * dp_aux_ep_dev_release() - Free memory for the dp_aux_ep device + * @dev: The device to free. + * + * Return: 0 if no error or negative error code. + */ +static void dp_aux_ep_dev_release(struct device *dev) +{ + kfree(to_dp_aux_ep_dev(dev)); +} + +static struct device_type dp_aux_device_type_type = { + .groups = dp_aux_ep_dev_groups, + .uevent = of_device_uevent_modalias, + .release = dp_aux_ep_dev_release, +}; + +/** + * of_dp_aux_ep_destroy() - Destroy an DP AUX endpoint device + * @dev: The device to destroy. + * @data: Not used + * + * This is just used as a callback by of_dp_aux_depopulate_ep_devices() and + * is called for _all_ of the child devices of the device providing the AUX bus. + * We'll only act on those that are of type "dp_aux_bus_type". + * + * This function is effectively an inverse of what's in the loop + * in of_dp_aux_populate_ep_devices(). + * + * Return: 0 if no error or negative error code. + */ +static int of_dp_aux_ep_destroy(struct device *dev, void *data) +{ + struct device_node *np = dev->of_node; + + if (dev->bus != &dp_aux_bus_type) + return 0; + + if (!of_node_check_flag(np, OF_POPULATED)) + return 0; + + of_node_clear_flag(np, OF_POPULATED); + of_node_put(np); + + device_unregister(dev); + + return 0; +} + +/** + * of_dp_aux_depopulate_ep_devices() - Undo of_dp_aux_populate_ep_devices + * @aux: The AUX channel whose devices we want to depopulate + * + * This will destroy all devices that were created + * by of_dp_aux_populate_ep_devices(). + */ +void of_dp_aux_depopulate_ep_devices(struct drm_dp_aux *aux) +{ + device_for_each_child_reverse(aux->dev, NULL, of_dp_aux_ep_destroy); +} +EXPORT_SYMBOL_GPL(of_dp_aux_depopulate_ep_devices); + +/** + * of_dp_aux_populate_ep_devices() - Populate the endpoint devices on the DP AUX + * @aux: The AUX channel whose devices we want to populate. It is required that + * drm_dp_aux_init() has already been called for this AUX channel. + * + * This will populate all the devices under the "aux-bus" node of the device + * providing the AUX channel (AKA aux->dev). + * + * When this function finishes, it is _possible_ (but not guaranteed) that + * our sub-devices will have finished probing. It should be noted that if our + * sub-devices return -EPROBE_DEFER that we will not return any error codes + * ourselves but our sub-devices will _not_ have actually probed successfully + * yet. There may be other cases (maybe added in the future?) where sub-devices + * won't have been probed yet when this function returns, so it's best not to + * rely on that. + * + * If this function succeeds you should later make sure you call + * of_dp_aux_depopulate_ep_devices() to undo it, or just use the devm version + * of this function. + * + * Return: 0 if no error or negative error code. + */ +int of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux) +{ + struct device_node *bus, *np; + struct dp_aux_ep_device *aux_ep; + int ret; + + /* drm_dp_aux_init() should have been called already; warn if not */ + WARN_ON_ONCE(!aux->ddc.algo); + + if (!aux->dev->of_node) + return 0; + + bus = of_get_child_by_name(aux->dev->of_node, "aux-bus"); + if (!bus) + return 0; + + for_each_available_child_of_node(bus, np) { + if (of_node_test_and_set_flag(np, OF_POPULATED)) + continue; + + aux_ep = kzalloc(sizeof(*aux_ep), GFP_KERNEL); + if (!aux_ep) + continue; + aux_ep->aux = aux; + + aux_ep->dev.parent = aux->dev; + aux_ep->dev.bus = &dp_aux_bus_type; + aux_ep->dev.type = &dp_aux_device_type_type; + aux_ep->dev.of_node = of_node_get(np); + dev_set_name(&aux_ep->dev, "aux-%s", dev_name(aux->dev)); + + ret = device_register(&aux_ep->dev); + if (ret) { + dev_err(aux->dev, "Failed to create AUX EP for %pOF: %d\n", np, ret); + of_node_clear_flag(np, OF_POPULATED); + of_node_put(np); + + /* + * As per docs of device_register(), call this instead + * of kfree() directly for error cases. + */ + put_device(&aux_ep->dev); + + /* + * Following in the footsteps of of_i2c_register_devices(), + * we won't fail the whole function here--we'll just + * continue registering any other devices we find. + */ + } + } + + of_node_put(bus); + + return 0; +} + +static void of_dp_aux_depopulate_ep_devices_void(void *data) +{ + of_dp_aux_depopulate_ep_devices(data); +} + +/** + * devm_of_dp_aux_populate_ep_devices() - devm wrapper for of_dp_aux_populate_ep_devices() + * @aux: The AUX channel whose devices we want to populate + * + * Handles freeing w/ devm on the device "aux->dev". + * + * Return: 0 if no error or negative error code. + */ +int devm_of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux) +{ + int ret; + + ret = of_dp_aux_populate_ep_devices(aux); + if (ret) + return ret; + + return devm_add_action_or_reset(aux->dev, + of_dp_aux_depopulate_ep_devices_void, + aux); +} +EXPORT_SYMBOL_GPL(devm_of_dp_aux_populate_ep_devices); + +int __dp_aux_dp_driver_register(struct dp_aux_ep_driver *drv, struct module *owner) +{ + drv->driver.owner = owner; + drv->driver.bus = &dp_aux_bus_type; + + return driver_register(&drv->driver); +} +EXPORT_SYMBOL_GPL(__dp_aux_dp_driver_register); + +void dp_aux_dp_driver_unregister(struct dp_aux_ep_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL_GPL(dp_aux_dp_driver_unregister); + +static int __init dp_aux_bus_init(void) +{ + int ret; + + ret = bus_register(&dp_aux_bus_type); + if (ret) + return ret; + + return 0; +} + +static void __exit dp_aux_bus_exit(void) +{ + bus_unregister(&dp_aux_bus_type); +} + +subsys_initcall(dp_aux_bus_init); +module_exit(dp_aux_bus_exit); + +MODULE_AUTHOR("Douglas Anderson "); +MODULE_DESCRIPTION("DRM DisplayPort AUX bus"); +MODULE_LICENSE("GPL v2"); diff --git a/include/drm/drm_dp_aux_bus.h b/include/drm/drm_dp_aux_bus.h new file mode 100644 index 000000000000..4f19b20b1dd6 --- /dev/null +++ b/include/drm/drm_dp_aux_bus.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2021 Google Inc. + * + * The DP AUX bus is used for devices that are connected over a DisplayPort + * AUX bus. The devices on the far side of the bus are referred to as + * endpoints in this code. + */ + +#ifndef _DP_AUX_BUS_H_ +#define _DP_AUX_BUS_H_ + +#include +#include + +/** + * struct dp_aux_ep_device - Main dev structure for DP AUX endpoints + * + * This is used to instantiate devices that are connected via a DP AUX + * bus. Usually the device is a panel, but conceivable other devices could + * be hooked up there. + */ +struct dp_aux_ep_device { + /** @dev: The normal dev pointer */ + struct device dev; + /** @aux: Pointer to the aux bus */ + struct drm_dp_aux *aux; +}; + +struct dp_aux_ep_driver { + int (*probe)(struct dp_aux_ep_device *aux_ep); + void (*remove)(struct dp_aux_ep_device *aux_ep); + void (*shutdown)(struct dp_aux_ep_device *aux_ep); + struct device_driver driver; +}; + +static inline struct dp_aux_ep_device *to_dp_aux_ep_dev(struct device *dev) +{ + return container_of(dev, struct dp_aux_ep_device, dev); +} + +static inline struct dp_aux_ep_driver *to_dp_aux_ep_drv(struct device_driver *drv) +{ + return container_of(drv, struct dp_aux_ep_driver, driver); +} + +int of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux); +void of_dp_aux_depopulate_ep_devices(struct drm_dp_aux *aux); +int devm_of_dp_aux_populate_ep_devices(struct drm_dp_aux *aux); + +#define dp_aux_dp_driver_register(aux_ep_drv) \ + __dp_aux_dp_driver_register(aux_ep_drv, THIS_MODULE) +int __dp_aux_dp_driver_register(struct dp_aux_ep_driver *aux_ep_drv, + struct module *owner); +void dp_aux_dp_driver_unregister(struct dp_aux_ep_driver *aux_ep_drv); + +#endif /* _DP_AUX_BUS_H_ */ -- cgit v1.2.3 From 14407d3afed07c48a536be01d92dcd9812bcb3d5 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 16 Jun 2021 16:15:27 +0200 Subject: drm/dp_helper: Rework the drm_dp_aux documentation Split the existing documentation to move the comments on particular fields next to them. Suggested-by: Daniel Vetter Signed-off-by: Maxime Ripard Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210616141529.630719-1-maxime@cerno.tech --- include/drm/drm_dp_helper.h | 102 ++++++++++++++++++++++++++++++-------------- 1 file changed, 69 insertions(+), 33 deletions(-) (limited to 'include/drm') diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 0bd6396648b4..683aa9892bad 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1859,35 +1859,6 @@ struct drm_dp_aux_cec { /** * struct drm_dp_aux - DisplayPort AUX channel - * @name: user-visible name of this AUX channel and the I2C-over-AUX adapter - * @ddc: I2C adapter that can be used for I2C-over-AUX communication - * @dev: pointer to struct device that is the parent for this AUX channel - * @drm_dev: pointer to the &drm_device that owns this AUX channel. Beware, this - * may be %NULL before drm_dp_aux_register() has been called. - * @crtc: backpointer to the crtc that is currently using this AUX channel - * @hw_mutex: internal mutex used for locking transfers - * @crc_work: worker that captures CRCs for each frame - * @crc_count: counter of captured frame CRCs - * @transfer: transfers a message representing a single AUX transaction - * - * The @dev field should be set to a pointer to the device that implements the - * AUX channel. As well, the @drm_dev field should be set to the &drm_device - * that will be using this AUX channel as early as possible. For many graphics - * drivers this should happen before drm_dp_aux_init(), however it's perfectly - * fine to set this field later so long as it's assigned before calling - * drm_dp_aux_register(). - * - * The @name field may be used to specify the name of the I2C adapter. If set to - * %NULL, dev_name() of @dev will be used. - * - * Drivers provide a hardware-specific implementation of how transactions are - * executed via the @transfer() function. A pointer to a &drm_dp_aux_msg - * structure describing the transaction is passed into this function. Upon - * success, the implementation should return the number of payload bytes that - * were transferred, or a negative error-code on failure. Helpers propagate - * errors from the @transfer() function, with the exception of the %-EBUSY - * error, which causes a transaction to be retried. On a short, helpers will - * return %-EPROTO to make it simpler to check for failure. * * An AUX channel can also be used to transport I2C messages to a sink. A * typical application of that is to access an EDID that's present in the sink @@ -1898,22 +1869,87 @@ struct drm_dp_aux_cec { * transfers by default; if a partial response is received, the adapter will * drop down to the size given by the partial response for this transaction * only. - * - * Note that the aux helper code assumes that the @transfer() function only - * modifies the reply field of the &drm_dp_aux_msg structure. The retry logic - * and i2c helpers assume this is the case. */ struct drm_dp_aux { + /** + * @name: user-visible name of this AUX channel and the + * I2C-over-AUX adapter. + * + * It's also used to specify the name of the I2C adapter. If set + * to %NULL, dev_name() of @dev will be used. + */ const char *name; + + /** + * @ddc: I2C adapter that can be used for I2C-over-AUX + * communication + */ struct i2c_adapter ddc; + + /** + * @dev: pointer to struct device that is the parent for this + * AUX channel. + */ struct device *dev; + + /** + * @drm_dev: pointer to the &drm_device that owns this AUX channel. + * Beware, this may be %NULL before drm_dp_aux_register() has been + * called. + * + * It should be set to the &drm_device that will be using this AUX + * channel as early as possible. For many graphics drivers this should + * happen before drm_dp_aux_init(), however it's perfectly fine to set + * this field later so long as it's assigned before calling + * drm_dp_aux_register(). + */ struct drm_device *drm_dev; + + /** + * @crtc: backpointer to the crtc that is currently using this + * AUX channel + */ struct drm_crtc *crtc; + + /** + * @hw_mutex: internal mutex used for locking transfers. + */ struct mutex hw_mutex; + + /** + * @crc_work: worker that captures CRCs for each frame + */ struct work_struct crc_work; + + /** + * @crc_count: counter of captured frame CRCs + */ u8 crc_count; + + /** + * @transfer: transfers a message representing a single AUX + * transaction. + * + * This is a hardware-specific implementation of how + * transactions are executed that the drivers must provide. + * + * A pointer to a &drm_dp_aux_msg structure describing the + * transaction is passed into this function. Upon success, the + * implementation should return the number of payload bytes that + * were transferred, or a negative error-code on failure. + * + * Helpers will propagate these errors, with the exception of + * the %-EBUSY error, which causes a transaction to be retried. + * On a short, helpers will return %-EPROTO to make it simpler + * to check for failure. + * + * The @transfer() function must only modify the reply field of + * the &drm_dp_aux_msg structure. The retry logic and i2c + * helpers assume this is the case. + */ ssize_t (*transfer)(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg); + /** * @i2c_nack_count: Counts I2C NACKs, used for DP validation. */ -- cgit v1.2.3 From c48935ab6b1280a80b38405369e88470f49809f4 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 16 Jun 2021 16:15:28 +0200 Subject: drm/dp_helper: Mention the concurrency requirement hw_mutex Drivers that allow concurrent access over multiple DP channels need to provide additional locking, even though the hw_mutex field might indicate otherwise. Clarify it in the documentation. Suggested-by: Daniel Vetter Signed-off-by: Maxime Ripard Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210616141529.630719-2-maxime@cerno.tech --- include/drm/drm_dp_helper.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/drm') diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 683aa9892bad..9336bfbdb389 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1913,6 +1913,10 @@ struct drm_dp_aux { /** * @hw_mutex: internal mutex used for locking transfers. + * + * Note that if the underlying hardware is shared among multiple + * channels, the driver needs to do additional locking to + * prevent concurrent access. */ struct mutex hw_mutex; -- cgit v1.2.3 From bacbab58f09dcf7c9a52b9f11388b3e25b9daa5f Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 16 Jun 2021 16:15:29 +0200 Subject: drm: Mention the power state requirement on side-channel operations The drm_connector detect, drm_dp_aux transfer and mipi_dsi_host operations typically require to access their underlying device to perform what is expected of them. However, there's no guarantee on the fact that the device has been enabled through atomic_enable or similar that will usually power the device. The access to an unpowered device is then an undefined behaviour ranging from the access being ignored to a hard CPU hang. Let's document that expectation to avoid as much as possible those consequences. Signed-off-by: Maxime Ripard Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210616141529.630719-3-maxime@cerno.tech --- include/drm/drm_connector.h | 5 +++++ include/drm/drm_dp_helper.h | 5 +++++ include/drm/drm_mipi_dsi.h | 5 +++++ 3 files changed, 15 insertions(+) (limited to 'include/drm') diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 714d1a01c065..0a1d9a0fcbb2 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -848,6 +848,11 @@ struct drm_connector_funcs { * locks to avoid races with concurrent modeset changes need to use * &drm_connector_helper_funcs.detect_ctx instead. * + * Also note that this callback can be called no matter the + * state the connector is in. Drivers that need the underlying + * device to be powered to perform the detection will first need + * to make sure it's been properly enabled. + * * RETURNS: * * drm_connector_status indicating the connector's status. diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 9336bfbdb389..729d5d82475e 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1950,6 +1950,11 @@ struct drm_dp_aux { * The @transfer() function must only modify the reply field of * the &drm_dp_aux_msg structure. The retry logic and i2c * helpers assume this is the case. + * + * Also note that this callback can be called no matter the + * state @dev is in. Drivers that need that device to be powered + * to perform this operation will first need to make sure it's + * been properly enabled. */ ssize_t (*transfer)(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 360e6377e84b..849d3029e303 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -80,6 +80,11 @@ int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, * Note that typically DSI packet transmission is atomic, so the .transfer() * function will seldomly return anything other than the number of bytes * contained in the transmit buffer on success. + * + * Also note that those callbacks can be called no matter the state the + * host is in. Drivers that need the underlying device to be powered to + * perform these operations will first need to make sure it's been + * properly enabled. */ struct mipi_dsi_host_ops { int (*attach)(struct mipi_dsi_host *host, -- cgit v1.2.3 From ae1bef72c20f9231898e2f5595751a2635d49db8 Mon Sep 17 00:00:00 2001 From: Lang Yu Date: Tue, 22 Jun 2021 12:23:34 -0400 Subject: drm/ttm: add TTM_PL_FLAG_TEMPORARY flag v3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sometimes drivers need to use bounce buffers to evict BOs. While those reside in some domain they are not necessarily suitable for CS. Add a flag so that drivers can note that a bounce buffers needs to be reallocated during validation. v2: add detailed comments v3 (chk): merge commits and rework commit message Suggested-by: Christian König Signed-off-by: Lang Yu Signed-off-by: Christian König Signed-off-by: Andrey Grodzovsky Acked-by: Nirmoy Das Link: https://patchwork.freedesktop.org/patch/msgid/20210622162339.761651-1-andrey.grodzovsky@amd.com --- drivers/gpu/drm/ttm/ttm_bo.c | 3 +++ include/drm/ttm/ttm_placement.h | 7 +++++-- 2 files changed, 8 insertions(+), 2 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 6c78149360c4..5a2dc712c632 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -918,6 +918,9 @@ static bool ttm_bo_places_compat(const struct ttm_place *places, { unsigned i; + if (mem->placement & TTM_PL_FLAG_TEMPORARY) + return false; + for (i = 0; i < num_placement; i++) { const struct ttm_place *heap = &places[i]; diff --git a/include/drm/ttm/ttm_placement.h b/include/drm/ttm/ttm_placement.h index aa6ba4d0cf78..8995c9e4ec1b 100644 --- a/include/drm/ttm/ttm_placement.h +++ b/include/drm/ttm/ttm_placement.h @@ -47,8 +47,11 @@ * top of the memory area, instead of the bottom. */ -#define TTM_PL_FLAG_CONTIGUOUS (1 << 19) -#define TTM_PL_FLAG_TOPDOWN (1 << 22) +#define TTM_PL_FLAG_CONTIGUOUS (1 << 0) +#define TTM_PL_FLAG_TOPDOWN (1 << 1) + +/* For multihop handling */ +#define TTM_PL_FLAG_TEMPORARY (1 << 2) /** * struct ttm_place -- cgit v1.2.3 From 7d30963fd191b7f2ea158e1abca8f05b41cc30d8 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 23 Jun 2021 18:22:00 +0200 Subject: drm/atomic-helper: make drm_gem_plane_helper_prepare_fb the default There's a bunch of atomic drivers who don't do this quite correctly, luckily most of them aren't in wide use or people would have noticed the tearing. By making this the default we avoid the constant audit pain and can additionally remove a ton of lines from vfuncs for a bit more clarity in smaller drivers. While at it complain if there's a cleanup_fb hook but no prepare_fb hook, because that makes no sense. I haven't found any driver which violates this, but better safe than sorry. Subsequent patches will reap the benefits. v2: It's neither ... nor, not not (Sam) Acked-by: Sam Ravnborg Signed-off-by: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210623162200.3372056-1-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_atomic_helper.c | 10 ++++++++++ drivers/gpu/drm/drm_gem_atomic_helper.c | 3 +++ include/drm/drm_modeset_helper_vtables.h | 7 +++++-- 3 files changed, 18 insertions(+), 2 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index bc3487964fb5..f7bf1ea62d58 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -2405,6 +2406,15 @@ int drm_atomic_helper_prepare_planes(struct drm_device *dev, ret = funcs->prepare_fb(plane, new_plane_state); if (ret) goto fail; + } else { + WARN_ON_ONCE(funcs->cleanup_fb); + + if (!drm_core_check_feature(dev, DRIVER_GEM)) + continue; + + ret = drm_gem_plane_helper_prepare_fb(plane, new_plane_state); + if (ret) + goto fail; } } diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c index a27135084ae5..bc9396f2a0ed 100644 --- a/drivers/gpu/drm/drm_gem_atomic_helper.c +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c @@ -135,6 +135,9 @@ * GEM based framebuffer drivers which have their buffers always pinned in * memory. * + * This function is the default implementation for GEM drivers of + * &drm_plane_helper_funcs.prepare_fb if no callback is provided. + * * See drm_atomic_set_fence_for_plane() for a discussion of implicit and * explicit fencing in atomic modeset updates. */ diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index f3a4b47b3986..fdfa9f37ce05 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -1178,8 +1178,11 @@ struct drm_plane_helper_funcs { * equivalent functionality should be implemented through private * members in the plane structure. * - * Drivers which always have their buffers pinned should use - * drm_gem_plane_helper_prepare_fb() for this hook. + * For GEM drivers who neither have a @prepare_fb nor @cleanup_fb hook + * set drm_gem_plane_helper_prepare_fb() is called automatically to + * implement this. Other drivers which need additional plane processing + * can call drm_gem_plane_helper_prepare_fb() from their @prepare_fb + * hook. * * The helpers will call @cleanup_fb with matching arguments for every * successful call to this hook. -- cgit v1.2.3 From f8bd3dbb9eb0f7b5d5e5dc960a555c0439ba5b76 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 22 Jun 2021 18:55:06 +0200 Subject: drm/vram-helpers: Create DRM_GEM_VRAM_PLANE_HELPER_FUNCS Like we have for the shadow helpers too, and roll it out to drivers. Acked-by: Thomas Zimmermann Acked-by: Tian Tao Signed-off-by: Daniel Vetter Cc: Dave Airlie Cc: Thomas Zimmermann Cc: Hans de Goede Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: David Airlie Cc: Daniel Vetter Cc: Tian Tao Cc: Laurent Pinchart Link: https://patchwork.freedesktop.org/patch/msgid/20210622165511.3169559-11-daniel.vetter@ffwll.ch --- drivers/gpu/drm/ast/ast_mode.c | 3 +-- drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c | 3 +-- drivers/gpu/drm/vboxvideo/vbox_mode.c | 3 +-- include/drm/drm_gem_vram_helper.h | 12 ++++++++++++ 4 files changed, 15 insertions(+), 6 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c index e5996ae03c49..f5d58c3088fe 100644 --- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -612,8 +612,7 @@ ast_primary_plane_helper_atomic_disable(struct drm_plane *plane, } static const struct drm_plane_helper_funcs ast_primary_plane_helper_funcs = { - .prepare_fb = drm_gem_vram_plane_helper_prepare_fb, - .cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb, + DRM_GEM_VRAM_PLANE_HELPER_FUNCS, .atomic_check = ast_primary_plane_helper_atomic_check, .atomic_update = ast_primary_plane_helper_atomic_update, .atomic_disable = ast_primary_plane_helper_atomic_disable, diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c index fa8da0ef707e..89bed78f1466 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c @@ -152,8 +152,7 @@ static const struct drm_plane_funcs hibmc_plane_funcs = { }; static const struct drm_plane_helper_funcs hibmc_plane_helper_funcs = { - .prepare_fb = drm_gem_vram_plane_helper_prepare_fb, - .cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb, + DRM_GEM_VRAM_PLANE_HELPER_FUNCS, .atomic_check = hibmc_plane_atomic_check, .atomic_update = hibmc_plane_atomic_update, }; diff --git a/drivers/gpu/drm/vboxvideo/vbox_mode.c b/drivers/gpu/drm/vboxvideo/vbox_mode.c index 964381d55fc1..972c83b720aa 100644 --- a/drivers/gpu/drm/vboxvideo/vbox_mode.c +++ b/drivers/gpu/drm/vboxvideo/vbox_mode.c @@ -488,8 +488,7 @@ static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = { .atomic_check = vbox_primary_atomic_check, .atomic_update = vbox_primary_atomic_update, .atomic_disable = vbox_primary_atomic_disable, - .prepare_fb = drm_gem_vram_plane_helper_prepare_fb, - .cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb, + DRM_GEM_VRAM_PLANE_HELPER_FUNCS, }; static const struct drm_plane_funcs vbox_primary_plane_funcs = { diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h index 27ed7e9243b9..f48d181c824b 100644 --- a/include/drm/drm_gem_vram_helper.h +++ b/include/drm/drm_gem_vram_helper.h @@ -124,6 +124,18 @@ void drm_gem_vram_plane_helper_cleanup_fb(struct drm_plane *plane, struct drm_plane_state *old_state); +/** + * DRM_GEM_VRAM_PLANE_HELPER_FUNCS - + * Initializes struct drm_plane_helper_funcs for VRAM handling + * + * Drivers may use GEM BOs as VRAM helpers for the framebuffer memory. This + * macro initializes struct drm_plane_helper_funcs to use the respective helper + * functions. + */ +#define DRM_GEM_VRAM_PLANE_HELPER_FUNCS \ + .prepare_fb = drm_gem_vram_plane_helper_prepare_fb, \ + .cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb + /* * Helpers for struct drm_simple_display_pipe_funcs */ -- cgit v1.2.3 From 40cfc7fce4d00f7c2152b28a1f6e7fcbb1a47ca6 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 23 Jun 2021 18:24:56 +0200 Subject: drm/simple-helper: drm_gem_simple_display_pipe_prepare_fb as default MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It's tedious to review this all the time, and my audit showed that arcpgu actually forgot to set this. Make this the default and stop worrying. Again I sprinkled WARN_ON_ONCE on top to make sure we don't have strange combinations of hooks: cleanup_fb without prepare_fb doesn't make sense, and since simpler drivers are all new they better be GEM based drivers. v2: Warn and bail when it's _not_ a GEM driver (Noralf) v3: It's neither ... nor, not not (Sam) Acked-by: Sam Ravnborg Cc: Sam Ravnborg Cc: Noralf Trønnes Acked-by: Noralf Trønnes Signed-off-by: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210623162456.3373469-1-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_simple_kms_helper.c | 12 ++++++++++-- include/drm/drm_simple_kms_helper.h | 7 +++++-- 2 files changed, 15 insertions(+), 4 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c index 0b095a313c44..735f4f34bcc4 100644 --- a/drivers/gpu/drm/drm_simple_kms_helper.c +++ b/drivers/gpu/drm/drm_simple_kms_helper.c @@ -9,6 +9,8 @@ #include #include #include +#include +#include #include #include #include @@ -225,8 +227,14 @@ static int drm_simple_kms_plane_prepare_fb(struct drm_plane *plane, struct drm_simple_display_pipe *pipe; pipe = container_of(plane, struct drm_simple_display_pipe, plane); - if (!pipe->funcs || !pipe->funcs->prepare_fb) - return 0; + if (!pipe->funcs || !pipe->funcs->prepare_fb) { + if (WARN_ON_ONCE(!drm_core_check_feature(plane->dev, DRIVER_GEM))) + return 0; + + WARN_ON_ONCE(pipe->funcs && pipe->funcs->cleanup_fb); + + return drm_gem_simple_display_pipe_prepare_fb(pipe, state); + } return pipe->funcs->prepare_fb(pipe, state); } diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h index ef9944e9c5fc..cf07132d4ee8 100644 --- a/include/drm/drm_simple_kms_helper.h +++ b/include/drm/drm_simple_kms_helper.h @@ -116,8 +116,11 @@ struct drm_simple_display_pipe_funcs { * the documentation for the &drm_plane_helper_funcs.prepare_fb hook for * more details. * - * Drivers which always have their buffers pinned should use - * drm_gem_simple_display_pipe_prepare_fb() for this hook. + * For GEM drivers who neither have a @prepare_fb nor @cleanup_fb hook + * set drm_gem_simple_display_pipe_prepare_fb() is called automatically + * to implement this. Other drivers which need additional plane + * processing can call drm_gem_simple_display_pipe_prepare_fb() from + * their @prepare_fb hook. */ int (*prepare_fb)(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state); -- cgit v1.2.3 From 1fad1b7ed1ebfcfb5a1d0d21b0c47f7af5f49a6c Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Wed, 30 Jun 2021 08:27:36 +0200 Subject: drm/sched: Document what the timedout_job method should do The documentation is a bit vague and doesn't really describe what the ->timedout_job() is expected to do. Let's add a few more details. v5: * New patch Suggested-by: Daniel Vetter Signed-off-by: Boris Brezillon Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210630062751.2832545-2-boris.brezillon@collabora.com --- include/drm/gpu_scheduler.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/drm') diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index d18af49fd009..aa90ed1f1b2b 100644 --- a/include/drm/gpu_scheduler.h +++ b/include/drm/gpu_scheduler.h @@ -239,6 +239,20 @@ struct drm_sched_backend_ops { * @timedout_job: Called when a job has taken too long to execute, * to trigger GPU recovery. * + * This method is called in a workqueue context. + * + * Drivers typically issue a reset to recover from GPU hangs, and this + * procedure usually follows the following workflow: + * + * 1. Stop the scheduler using drm_sched_stop(). This will park the + * scheduler thread and cancel the timeout work, guaranteeing that + * nothing is queued while we reset the hardware queue + * 2. Try to gracefully stop non-faulty jobs (optional) + * 3. Issue a GPU reset (driver-specific) + * 4. Re-submit jobs using drm_sched_resubmit_jobs() + * 5. Restart the scheduler using drm_sched_start(). At that point, new + * jobs can be queued, and the scheduler thread is unblocked + * * Return DRM_GPU_SCHED_STAT_NOMINAL, when all is normal, * and the underlying driver has started or completed recovery. * -- cgit v1.2.3 From 78efe21b6f8e6f4d39fceaf0cc5c534c11f9dd60 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Wed, 30 Jun 2021 08:27:37 +0200 Subject: drm/sched: Allow using a dedicated workqueue for the timeout/fault tdr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Mali Midgard/Bifrost GPUs have 3 hardware queues but only a global GPU reset. This leads to extra complexity when we need to synchronize timeout works with the reset work. One solution to address that is to have an ordered workqueue at the driver level that will be used by the different schedulers to queue their timeout work. Thanks to the serialization provided by the ordered workqueue we are guaranteed that timeout handlers are executed sequentially, and can thus easily reset the GPU from the timeout handler without extra synchronization. v5: * Add a new paragraph to the timedout_job() method v3: * New patch v4: * Actually use the timeout_wq to queue the timeout work Suggested-by: Daniel Vetter Signed-off-by: Boris Brezillon Reviewed-by: Steven Price Reviewed-by: Lucas Stach Acked-by: Daniel Vetter Acked-by: Christian König Cc: Qiang Yu Cc: Emma Anholt Cc: Alex Deucher Cc: "Christian König" Link: https://patchwork.freedesktop.org/patch/msgid/20210630062751.2832545-3-boris.brezillon@collabora.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 2 +- drivers/gpu/drm/etnaviv/etnaviv_sched.c | 3 ++- drivers/gpu/drm/lima/lima_sched.c | 3 ++- drivers/gpu/drm/panfrost/panfrost_job.c | 3 ++- drivers/gpu/drm/scheduler/sched_main.c | 14 +++++++++----- drivers/gpu/drm/v3d/v3d_sched.c | 10 +++++----- include/drm/gpu_scheduler.h | 23 ++++++++++++++++++++++- 7 files changed, 43 insertions(+), 15 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 72d9b92b1754..d4547d195173 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -490,7 +490,7 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring, r = drm_sched_init(&ring->sched, &amdgpu_sched_ops, num_hw_submission, amdgpu_job_hang_limit, - timeout, sched_score, ring->name); + timeout, NULL, sched_score, ring->name); if (r) { DRM_ERROR("Failed to create scheduler on ring %s.\n", ring->name); diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c index 19826e504efc..feb6da1b6ceb 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c @@ -190,7 +190,8 @@ int etnaviv_sched_init(struct etnaviv_gpu *gpu) ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops, etnaviv_hw_jobs_limit, etnaviv_job_hang_limit, - msecs_to_jiffies(500), NULL, dev_name(gpu->dev)); + msecs_to_jiffies(500), NULL, NULL, + dev_name(gpu->dev)); if (ret) return ret; diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c index ecf3267334ff..dba8329937a3 100644 --- a/drivers/gpu/drm/lima/lima_sched.c +++ b/drivers/gpu/drm/lima/lima_sched.c @@ -508,7 +508,8 @@ int lima_sched_pipe_init(struct lima_sched_pipe *pipe, const char *name) INIT_WORK(&pipe->recover_work, lima_sched_recover_work); return drm_sched_init(&pipe->base, &lima_sched_ops, 1, - lima_job_hang_limit, msecs_to_jiffies(timeout), + lima_job_hang_limit, + msecs_to_jiffies(timeout), NULL, NULL, name); } diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index beb62c8fc851..17bc5e3bfe0e 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -615,7 +615,8 @@ int panfrost_job_init(struct panfrost_device *pfdev) ret = drm_sched_init(&js->queue[j].sched, &panfrost_sched_ops, - 1, 0, msecs_to_jiffies(JOB_TIMEOUT_MS), + 1, 0, + msecs_to_jiffies(JOB_TIMEOUT_MS), NULL, NULL, "pan_js"); if (ret) { dev_err(pfdev->dev, "Failed to create scheduler: %d.", ret); diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 60125fbe7bb5..67382621b429 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -232,7 +232,7 @@ static void drm_sched_start_timeout(struct drm_gpu_scheduler *sched) { if (sched->timeout != MAX_SCHEDULE_TIMEOUT && !list_empty(&sched->pending_list)) - schedule_delayed_work(&sched->work_tdr, sched->timeout); + queue_delayed_work(sched->timeout_wq, &sched->work_tdr, sched->timeout); } /** @@ -244,7 +244,7 @@ static void drm_sched_start_timeout(struct drm_gpu_scheduler *sched) */ void drm_sched_fault(struct drm_gpu_scheduler *sched) { - mod_delayed_work(system_wq, &sched->work_tdr, 0); + mod_delayed_work(sched->timeout_wq, &sched->work_tdr, 0); } EXPORT_SYMBOL(drm_sched_fault); @@ -270,7 +270,7 @@ unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched) * Modify the timeout to an arbitrarily large value. This also prevents * the timeout to be restarted when new submissions arrive */ - if (mod_delayed_work(system_wq, &sched->work_tdr, MAX_SCHEDULE_TIMEOUT) + if (mod_delayed_work(sched->timeout_wq, &sched->work_tdr, MAX_SCHEDULE_TIMEOUT) && time_after(sched_timeout, now)) return sched_timeout - now; else @@ -294,7 +294,7 @@ void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched, if (list_empty(&sched->pending_list)) cancel_delayed_work(&sched->work_tdr); else - mod_delayed_work(system_wq, &sched->work_tdr, remaining); + mod_delayed_work(sched->timeout_wq, &sched->work_tdr, remaining); spin_unlock(&sched->job_list_lock); } @@ -847,6 +847,8 @@ static int drm_sched_main(void *param) * @hw_submission: number of hw submissions that can be in flight * @hang_limit: number of times to allow a job to hang before dropping it * @timeout: timeout value in jiffies for the scheduler + * @timeout_wq: workqueue to use for timeout work. If NULL, the system_wq is + * used * @score: optional score atomic shared with other schedulers * @name: name used for debugging * @@ -854,7 +856,8 @@ static int drm_sched_main(void *param) */ int drm_sched_init(struct drm_gpu_scheduler *sched, const struct drm_sched_backend_ops *ops, - unsigned hw_submission, unsigned hang_limit, long timeout, + unsigned hw_submission, unsigned hang_limit, + long timeout, struct workqueue_struct *timeout_wq, atomic_t *score, const char *name) { int i, ret; @@ -862,6 +865,7 @@ int drm_sched_init(struct drm_gpu_scheduler *sched, sched->hw_submission_limit = hw_submission; sched->name = name; sched->timeout = timeout; + sched->timeout_wq = timeout_wq ? : system_wq; sched->hang_limit = hang_limit; sched->score = score ? score : &sched->_score; for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_COUNT; i++) diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c index 8992480c88fa..a39bdd5cfc4f 100644 --- a/drivers/gpu/drm/v3d/v3d_sched.c +++ b/drivers/gpu/drm/v3d/v3d_sched.c @@ -402,7 +402,7 @@ v3d_sched_init(struct v3d_dev *v3d) ret = drm_sched_init(&v3d->queue[V3D_BIN].sched, &v3d_bin_sched_ops, hw_jobs_limit, job_hang_limit, - msecs_to_jiffies(hang_limit_ms), + msecs_to_jiffies(hang_limit_ms), NULL, NULL, "v3d_bin"); if (ret) { dev_err(v3d->drm.dev, "Failed to create bin scheduler: %d.", ret); @@ -412,7 +412,7 @@ v3d_sched_init(struct v3d_dev *v3d) ret = drm_sched_init(&v3d->queue[V3D_RENDER].sched, &v3d_render_sched_ops, hw_jobs_limit, job_hang_limit, - msecs_to_jiffies(hang_limit_ms), + msecs_to_jiffies(hang_limit_ms), NULL, NULL, "v3d_render"); if (ret) { dev_err(v3d->drm.dev, "Failed to create render scheduler: %d.", @@ -424,7 +424,7 @@ v3d_sched_init(struct v3d_dev *v3d) ret = drm_sched_init(&v3d->queue[V3D_TFU].sched, &v3d_tfu_sched_ops, hw_jobs_limit, job_hang_limit, - msecs_to_jiffies(hang_limit_ms), + msecs_to_jiffies(hang_limit_ms), NULL, NULL, "v3d_tfu"); if (ret) { dev_err(v3d->drm.dev, "Failed to create TFU scheduler: %d.", @@ -437,7 +437,7 @@ v3d_sched_init(struct v3d_dev *v3d) ret = drm_sched_init(&v3d->queue[V3D_CSD].sched, &v3d_csd_sched_ops, hw_jobs_limit, job_hang_limit, - msecs_to_jiffies(hang_limit_ms), + msecs_to_jiffies(hang_limit_ms), NULL, NULL, "v3d_csd"); if (ret) { dev_err(v3d->drm.dev, "Failed to create CSD scheduler: %d.", @@ -449,7 +449,7 @@ v3d_sched_init(struct v3d_dev *v3d) ret = drm_sched_init(&v3d->queue[V3D_CACHE_CLEAN].sched, &v3d_cache_clean_sched_ops, hw_jobs_limit, job_hang_limit, - msecs_to_jiffies(hang_limit_ms), + msecs_to_jiffies(hang_limit_ms), NULL, NULL, "v3d_cache_clean"); if (ret) { dev_err(v3d->drm.dev, "Failed to create CACHE_CLEAN scheduler: %d.", diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index aa90ed1f1b2b..88ae7f331bb1 100644 --- a/include/drm/gpu_scheduler.h +++ b/include/drm/gpu_scheduler.h @@ -253,6 +253,24 @@ struct drm_sched_backend_ops { * 5. Restart the scheduler using drm_sched_start(). At that point, new * jobs can be queued, and the scheduler thread is unblocked * + * Note that some GPUs have distinct hardware queues but need to reset + * the GPU globally, which requires extra synchronization between the + * timeout handler of the different &drm_gpu_scheduler. One way to + * achieve this synchronization is to create an ordered workqueue + * (using alloc_ordered_workqueue()) at the driver level, and pass this + * queue to drm_sched_init(), to guarantee that timeout handlers are + * executed sequentially. The above workflow needs to be slightly + * adjusted in that case: + * + * 1. Stop all schedulers impacted by the reset using drm_sched_stop() + * 2. Try to gracefully stop non-faulty jobs on all queues impacted by + * the reset (optional) + * 3. Issue a GPU reset on all faulty queues (driver-specific) + * 4. Re-submit jobs on all schedulers impacted by the reset using + * drm_sched_resubmit_jobs() + * 5. Restart all schedulers that were stopped in step #1 using + * drm_sched_start() + * * Return DRM_GPU_SCHED_STAT_NOMINAL, when all is normal, * and the underlying driver has started or completed recovery. * @@ -283,6 +301,7 @@ struct drm_sched_backend_ops { * finished. * @hw_rq_count: the number of jobs currently in the hardware queue. * @job_id_count: used to assign unique id to the each job. + * @timeout_wq: workqueue used to queue @work_tdr * @work_tdr: schedules a delayed call to @drm_sched_job_timedout after the * timeout interval is over. * @thread: the kthread on which the scheduler which run. @@ -307,6 +326,7 @@ struct drm_gpu_scheduler { wait_queue_head_t job_scheduled; atomic_t hw_rq_count; atomic64_t job_id_count; + struct workqueue_struct *timeout_wq; struct delayed_work work_tdr; struct task_struct *thread; struct list_head pending_list; @@ -320,7 +340,8 @@ struct drm_gpu_scheduler { int drm_sched_init(struct drm_gpu_scheduler *sched, const struct drm_sched_backend_ops *ops, - uint32_t hw_submission, unsigned hang_limit, long timeout, + uint32_t hw_submission, unsigned hang_limit, + long timeout, struct workqueue_struct *timeout_wq, atomic_t *score, const char *name); void drm_sched_fini(struct drm_gpu_scheduler *sched); -- cgit v1.2.3 From 97c9bfe3f6605d41eb8f1206e6e0f62b31ba15d6 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Tue, 29 Jun 2021 15:58:33 +0200 Subject: drm/aperture: Pass DRM driver structure instead of driver name Print the name of the DRM driver when taking over fbdev devices. Makes the output to dmesg more consistent. Note that the driver name is only used for printing a string to the kernel log. No UAPI is affected by this change. Signed-off-by: Thomas Zimmermann Acked-by: Nirmoy Das Acked-by: Chen-Yu Tsai # sun4i Acked-by: Neil Armstrong # meson Link: https://patchwork.freedesktop.org/patch/msgid/20210629135833.22679-1-tzimmermann@suse.de --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 +- drivers/gpu/drm/armada/armada_drv.c | 2 +- drivers/gpu/drm/ast/ast_drv.c | 2 +- drivers/gpu/drm/bochs/bochs_drv.c | 2 +- drivers/gpu/drm/drm_aperture.c | 19 ++++++++++++------- drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 2 +- drivers/gpu/drm/hyperv/hyperv_drm_drv.c | 4 ++-- drivers/gpu/drm/i915/i915_drv.c | 2 +- drivers/gpu/drm/meson/meson_drv.c | 2 +- drivers/gpu/drm/mgag200/mgag200_drv.c | 2 +- drivers/gpu/drm/msm/msm_fbdev.c | 2 +- drivers/gpu/drm/nouveau/nouveau_drm.c | 2 +- drivers/gpu/drm/qxl/qxl_drv.c | 2 +- drivers/gpu/drm/radeon/radeon_drv.c | 2 +- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +- drivers/gpu/drm/sun4i/sun4i_drv.c | 2 +- drivers/gpu/drm/tegra/drm.c | 2 +- drivers/gpu/drm/tiny/cirrus.c | 2 +- drivers/gpu/drm/vboxvideo/vbox_drv.c | 2 +- drivers/gpu/drm/vc4/vc4_drv.c | 2 +- drivers/gpu/drm/virtio/virtgpu_drv.c | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +- include/drm/drm_aperture.h | 14 +++++++++----- 23 files changed, 43 insertions(+), 34 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index c080ba15ae77..d2673119e0d1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1263,7 +1263,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev, #endif /* Get rid of things like offb */ - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "amdgpudrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &amdgpu_kms_driver); if (ret) return ret; diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c index 4a64f1b9ec4d..8e3e98f13db4 100644 --- a/drivers/gpu/drm/armada/armada_drv.c +++ b/drivers/gpu/drm/armada/armada_drv.c @@ -95,7 +95,7 @@ static int armada_drm_bind(struct device *dev) } /* Remove early framebuffers */ - ret = drm_aperture_remove_framebuffers(false, "armada-drm-fb"); + ret = drm_aperture_remove_framebuffers(false, &armada_drm_driver); if (ret) { dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n", __func__, ret); diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c index 5aa452b4efe6..86d5cd7b6318 100644 --- a/drivers/gpu/drm/ast/ast_drv.c +++ b/drivers/gpu/drm/ast/ast_drv.c @@ -100,7 +100,7 @@ static int ast_remove_conflicting_framebuffers(struct pci_dev *pdev) primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW; #endif - return drm_aperture_remove_conflicting_framebuffers(base, size, primary, "astdrmfb"); + return drm_aperture_remove_conflicting_framebuffers(base, size, primary, &ast_driver); } static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c index c828cadbabff..0d232b44ecd7 100644 --- a/drivers/gpu/drm/bochs/bochs_drv.c +++ b/drivers/gpu/drm/bochs/bochs_drv.c @@ -110,7 +110,7 @@ static int bochs_pci_probe(struct pci_dev *pdev, return -ENOMEM; } - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "bochsdrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &bochs_driver); if (ret) return ret; diff --git a/drivers/gpu/drm/drm_aperture.c b/drivers/gpu/drm/drm_aperture.c index 9335d9d6cf9a..9ac39cf11694 100644 --- a/drivers/gpu/drm/drm_aperture.c +++ b/drivers/gpu/drm/drm_aperture.c @@ -33,6 +33,10 @@ * * .. code-block:: c * + * static const struct drm_driver example_driver = { + * ... + * }; + * * static int remove_conflicting_framebuffers(struct pci_dev *pdev) * { * bool primary = false; @@ -46,7 +50,7 @@ * #endif * * return drm_aperture_remove_conflicting_framebuffers(base, size, primary, - * "example driver"); + * &example_driver); * } * * static int probe(struct pci_dev *pdev) @@ -274,7 +278,7 @@ static void drm_aperture_detach_drivers(resource_size_t base, resource_size_t si * @base: the aperture's base address in physical memory * @size: aperture size in bytes * @primary: also kick vga16fb if present - * @name: requesting driver name + * @req_driver: requesting DRM driver * * This function removes graphics device drivers which use memory range described by * @base and @size. @@ -283,7 +287,7 @@ static void drm_aperture_detach_drivers(resource_size_t base, resource_size_t si * 0 on success, or a negative errno code otherwise */ int drm_aperture_remove_conflicting_framebuffers(resource_size_t base, resource_size_t size, - bool primary, const char *name) + bool primary, const struct drm_driver *req_driver) { #if IS_REACHABLE(CONFIG_FB) struct apertures_struct *a; @@ -296,7 +300,7 @@ int drm_aperture_remove_conflicting_framebuffers(resource_size_t base, resource_ a->ranges[0].base = base; a->ranges[0].size = size; - ret = remove_conflicting_framebuffers(a, name, primary); + ret = remove_conflicting_framebuffers(a, req_driver->name, primary); kfree(a); if (ret) @@ -312,7 +316,7 @@ EXPORT_SYMBOL(drm_aperture_remove_conflicting_framebuffers); /** * drm_aperture_remove_conflicting_pci_framebuffers - remove existing framebuffers for PCI devices * @pdev: PCI device - * @name: requesting driver name + * @req_driver: requesting DRM driver * * This function removes graphics device drivers using memory range configured * for any of @pdev's memory bars. The function assumes that PCI device with @@ -321,7 +325,8 @@ EXPORT_SYMBOL(drm_aperture_remove_conflicting_framebuffers); * Returns: * 0 on success, or a negative errno code otherwise */ -int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, const char *name) +int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, + const struct drm_driver *req_driver) { resource_size_t base, size; int bar, ret = 0; @@ -339,7 +344,7 @@ int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, const * otherwise the vga fbdev driver falls over. */ #if IS_REACHABLE(CONFIG_FB) - ret = remove_conflicting_pci_framebuffers(pdev, name); + ret = remove_conflicting_pci_framebuffers(pdev, req_driver->name); #endif if (ret == 0) ret = vga_remove_vgacon(pdev); diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c index f8ef711bbe5d..d2628956dca3 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c @@ -313,7 +313,7 @@ static int hibmc_pci_probe(struct pci_dev *pdev, struct drm_device *dev; int ret; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "hibmcdrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &hibmc_driver); if (ret) return ret; diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c index eb06c92c4bfd..cd818a629183 100644 --- a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c +++ b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c @@ -82,7 +82,7 @@ static int hyperv_setup_gen1(struct hyperv_drm_device *hv) return -ENODEV; } - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "hypervdrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &hyperv_driver); if (ret) { drm_err(dev, "Not able to remove boot fb\n"); return ret; @@ -127,7 +127,7 @@ static int hyperv_setup_gen2(struct hyperv_drm_device *hv, drm_aperture_remove_conflicting_framebuffers(screen_info.lfb_base, screen_info.lfb_size, false, - "hypervdrmfb"); + &hyperv_driver); hv->fb_size = (unsigned long)hv->mmio_megabytes * 1024 * 1024; diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 850b499c71c8..62327c15f457 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -562,7 +562,7 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv) if (ret) goto err_perf; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "inteldrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, dev_priv->drm.driver); if (ret) goto err_ggtt; diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 66de3f4f7222..4f9bc3793744 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -285,7 +285,7 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) * Remove early framebuffers (ie. simplefb). The framebuffer can be * located anywhere in RAM */ - ret = drm_aperture_remove_framebuffers(false, "meson-drm-fb"); + ret = drm_aperture_remove_framebuffers(false, &meson_driver); if (ret) goto free_drm; diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index a701d9563257..36d1bfb3213f 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -342,7 +342,7 @@ mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) struct drm_device *dev; int ret; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver); if (ret) return ret; diff --git a/drivers/gpu/drm/msm/msm_fbdev.c b/drivers/gpu/drm/msm/msm_fbdev.c index 227404077e39..67fae60f2fa5 100644 --- a/drivers/gpu/drm/msm/msm_fbdev.c +++ b/drivers/gpu/drm/msm/msm_fbdev.c @@ -169,7 +169,7 @@ struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev) } /* the fw fb could be anywhere in memory */ - ret = drm_aperture_remove_framebuffers(false, "msm"); + ret = drm_aperture_remove_framebuffers(false, dev->driver); if (ret) goto fini; diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 1cb14e99a60c..5e1ff870823b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -736,7 +736,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev, nvkm_device_del(&device); /* Remove conflicting drivers (vesafb, efifb etc). */ - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "nouveaufb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver_pci); if (ret) return ret; diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c index 854e6c5a563f..31f4c86ceb99 100644 --- a/drivers/gpu/drm/qxl/qxl_drv.c +++ b/drivers/gpu/drm/qxl/qxl_drv.c @@ -95,7 +95,7 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) return ret; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "qxl"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &qxl_driver); if (ret) goto disable_pci; diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 8cd135fa6dcd..82ee8244c9b3 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -330,7 +330,7 @@ static int radeon_pci_probe(struct pci_dev *pdev, return -EPROBE_DEFER; /* Get rid of things like offb */ - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "radeondrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &kms_driver); if (ret) return ret; diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index c8e60fd9ff24..bfba9793d238 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -116,7 +116,7 @@ static int rockchip_drm_bind(struct device *dev) int ret; /* Remove existing drivers that may own the framebuffer memory. */ - ret = drm_aperture_remove_framebuffers(false, "rockchip-drm-fb"); + ret = drm_aperture_remove_framebuffers(false, &rockchip_drm_driver); if (ret) { DRM_DEV_ERROR(dev, "Failed to remove existing framebuffers - %d.\n", diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c index 570f3af25e86..54dd562e294c 100644 --- a/drivers/gpu/drm/sun4i/sun4i_drv.c +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c @@ -98,7 +98,7 @@ static int sun4i_drv_bind(struct device *dev) goto cleanup_mode_config; /* Remove early framebuffers (ie. simplefb) */ - ret = drm_aperture_remove_framebuffers(false, "sun4i-drm-fb"); + ret = drm_aperture_remove_framebuffers(false, &sun4i_drv_driver); if (ret) goto cleanup_mode_config; diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 8d27c21ddf48..8c6069b33160 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -1197,7 +1197,7 @@ static int host1x_drm_probe(struct host1x_device *dev) drm_mode_config_reset(drm); - err = drm_aperture_remove_framebuffers(false, "tegradrmfb"); + err = drm_aperture_remove_framebuffers(false, &tegra_drm_driver); if (err < 0) goto hub; diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c index 42611dacde88..a8b476a59c0d 100644 --- a/drivers/gpu/drm/tiny/cirrus.c +++ b/drivers/gpu/drm/tiny/cirrus.c @@ -550,7 +550,7 @@ static int cirrus_pci_probe(struct pci_dev *pdev, struct cirrus_device *cirrus; int ret; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "cirrusdrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &cirrus_driver); if (ret) return ret; diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c index 6d4b32da9866..879a2445cc44 100644 --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c @@ -43,7 +43,7 @@ static int vbox_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (!vbox_check_supported(VBE_DISPI_ID_HGSMI)) return -ENODEV; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "vboxvideodrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver); if (ret) return ret; diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 8a60fb8ad370..73335feb712f 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -265,7 +265,7 @@ static int vc4_drm_bind(struct device *dev) if (ret) goto unbind_all; - ret = drm_aperture_remove_framebuffers(false, "vc4drmfb"); + ret = drm_aperture_remove_framebuffers(false, &vc4_drm_driver); if (ret) goto unbind_all; diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index ca77edbc5ea0..ed85a7863256 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -57,7 +57,7 @@ static int virtio_gpu_pci_quirk(struct drm_device *dev, struct virtio_device *vd vga ? "virtio-vga" : "virtio-gpu-pci", pname); if (vga) { - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "virtiodrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver); if (ret) return ret; } diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index 086dc75e7b42..40864ce19ae1 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -1574,7 +1574,7 @@ static int vmw_probe(struct pci_dev *pdev, const struct pci_device_id *ent) struct vmw_private *vmw; int ret; - ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "svgadrmfb"); + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &driver); if (ret) return ret; diff --git a/include/drm/drm_aperture.h b/include/drm/drm_aperture.h index 6c148078780c..7096703c3949 100644 --- a/include/drm/drm_aperture.h +++ b/include/drm/drm_aperture.h @@ -6,20 +6,22 @@ #include struct drm_device; +struct drm_driver; struct pci_dev; int devm_aperture_acquire_from_firmware(struct drm_device *dev, resource_size_t base, resource_size_t size); int drm_aperture_remove_conflicting_framebuffers(resource_size_t base, resource_size_t size, - bool primary, const char *name); + bool primary, const struct drm_driver *req_driver); -int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, const char *name); +int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, + const struct drm_driver *req_driver); /** * drm_aperture_remove_framebuffers - remove all existing framebuffers * @primary: also kick vga16fb if present - * @name: requesting driver name + * @req_driver: requesting DRM driver * * This function removes all graphics device drivers. Use this function on systems * that can have their framebuffer located anywhere in memory. @@ -27,9 +29,11 @@ int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, const * Returns: * 0 on success, or a negative errno code otherwise */ -static inline int drm_aperture_remove_framebuffers(bool primary, const char *name) +static inline int +drm_aperture_remove_framebuffers(bool primary, const struct drm_driver *req_driver) { - return drm_aperture_remove_conflicting_framebuffers(0, (resource_size_t)-1, primary, name); + return drm_aperture_remove_conflicting_framebuffers(0, (resource_size_t)-1, primary, + req_driver); } #endif -- cgit v1.2.3 From 3f5aa5ac0b0f9704f0c60f5fbbbcdc8c043d6eb6 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 2 Jul 2021 15:56:01 +0200 Subject: drm/dbi: Print errors for mipi_dbi_command() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The macro mipi_dbi_command() does not report errors unless you wrap it in another macro to do the error reporting. Report a rate-limited error so we know what is going on. After this any code wishing to send command arrays can rely on mipi_dbi_command() providing an appropriate error message if something goes wrong. Suggested-by: Noralf Trønnes Suggested-by: Douglas Anderson Signed-off-by: Linus Walleij Reviewed-by: Noralf Trønnes Link: https://patchwork.freedesktop.org/patch/msgid/20210702135601.3952726-1-linus.walleij@linaro.org --- include/drm/drm_mipi_dbi.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'include/drm') diff --git a/include/drm/drm_mipi_dbi.h b/include/drm/drm_mipi_dbi.h index f543d6e3e822..05e194958265 100644 --- a/include/drm/drm_mipi_dbi.h +++ b/include/drm/drm_mipi_dbi.h @@ -183,7 +183,12 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb, #define mipi_dbi_command(dbi, cmd, seq...) \ ({ \ const u8 d[] = { seq }; \ - mipi_dbi_command_stackbuf(dbi, cmd, d, ARRAY_SIZE(d)); \ + struct device *dev = &(dbi)->spi->dev; \ + int ret; \ + ret = mipi_dbi_command_stackbuf(dbi, cmd, d, ARRAY_SIZE(d)); \ + if (ret) \ + dev_err_ratelimited(dev, "error %d when sending command %#02x\n", ret, cmd); \ + ret; \ }) #ifdef CONFIG_DEBUG_FS -- cgit v1.2.3 From 9aa0267476eda3c77890dd939fb2579bffceb3ae Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 2 Jul 2021 09:54:34 +0200 Subject: drm/vram-helper: Unexport drm_vram_helper_{alloc,release}_mm() All GEM-VRAM-based drivers use auto-cleanup via drmm_vram_helper_init(). Unexport the manual APIs and make them internal implementation. Signed-off-by: Thomas Zimmermann Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210702075434.27677-4-tzimmermann@suse.de --- drivers/gpu/drm/drm_gem_vram_helper.c | 9 +++------ include/drm/drm_gem_vram_helper.h | 4 ---- 2 files changed, 3 insertions(+), 10 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index 2a1229b8364e..1e9b82e51a07 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -1012,9 +1012,8 @@ static void drm_vram_mm_cleanup(struct drm_vram_mm *vmm) * Helpers for integration with struct drm_device */ -/* deprecated; use drmm_vram_mm_init() */ -struct drm_vram_mm *drm_vram_helper_alloc_mm( - struct drm_device *dev, uint64_t vram_base, size_t vram_size) +static struct drm_vram_mm *drm_vram_helper_alloc_mm(struct drm_device *dev, uint64_t vram_base, + size_t vram_size) { int ret; @@ -1036,9 +1035,8 @@ err_kfree: dev->vram_mm = NULL; return ERR_PTR(ret); } -EXPORT_SYMBOL(drm_vram_helper_alloc_mm); -void drm_vram_helper_release_mm(struct drm_device *dev) +static void drm_vram_helper_release_mm(struct drm_device *dev) { if (!dev->vram_mm) return; @@ -1047,7 +1045,6 @@ void drm_vram_helper_release_mm(struct drm_device *dev) kfree(dev->vram_mm); dev->vram_mm = NULL; } -EXPORT_SYMBOL(drm_vram_helper_release_mm); static void drm_vram_mm_release(struct drm_device *dev, void *ptr) { diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h index f48d181c824b..d3cf06c9af65 100644 --- a/include/drm/drm_gem_vram_helper.h +++ b/include/drm/drm_gem_vram_helper.h @@ -204,10 +204,6 @@ void drm_vram_mm_debugfs_init(struct drm_minor *minor); * Helpers for integration with struct drm_device */ -struct drm_vram_mm *drm_vram_helper_alloc_mm( - struct drm_device *dev, uint64_t vram_base, size_t vram_size); -void drm_vram_helper_release_mm(struct drm_device *dev); - int drmm_vram_helper_init(struct drm_device *dev, uint64_t vram_base, size_t vram_size); -- cgit v1.2.3 From 10f7b40e4f3050cd22a161f46a47564e8c5ce91f Mon Sep 17 00:00:00 2001 From: Rajeev Nandan Date: Sat, 26 Jun 2021 22:21:03 +0530 Subject: drm/panel: add basic DP AUX backlight support Some panels support backlight control over DP AUX channel using VESA's standard backlight control interface. Using new DRM eDP backlight helpers, add support to create and register a backlight for those panels in drm_panel to simplify the panel drivers. The panel driver with access to "struct drm_dp_aux" can create and register a backlight device using following code snippet in its probe() function: err = drm_panel_dp_aux_backlight(panel, aux); if (err) return err; Then drm_panel will handle backlight_(enable|disable) calls similar to the case when drm_panel_of_backlight() is used. Currently, we are not supporting one feature where the source device can combine the backlight brightness levels set through DP AUX and the BL_PWM_DIM eDP connector pin. Since it's not required for the basic backlight controls, it can be added later. Signed-off-by: Rajeev Nandan Reviewed-by: Douglas Anderson Reviewed-by: Lyude Paul [dianders: added blank line for warning when applying] Signed-off-by: Douglas Anderson Link: https://patchwork.freedesktop.org/patch/msgid/1624726268-14869-2-git-send-email-rajeevny@codeaurora.org --- drivers/gpu/drm/drm_panel.c | 108 ++++++++++++++++++++++++++++++++++++++++++++ include/drm/drm_panel.h | 16 +++++-- 2 files changed, 120 insertions(+), 4 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index f634371c717a..4fa1e3bb1b78 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -26,12 +26,20 @@ #include #include +#include #include #include static DEFINE_MUTEX(panel_lock); static LIST_HEAD(panel_list); +struct dp_aux_backlight { + struct backlight_device *base; + struct drm_dp_aux *aux; + struct drm_edp_backlight_info info; + bool enabled; +}; + /** * DOC: drm panel * @@ -342,6 +350,106 @@ int drm_panel_of_backlight(struct drm_panel *panel) return 0; } EXPORT_SYMBOL(drm_panel_of_backlight); + +static int dp_aux_backlight_update_status(struct backlight_device *bd) +{ + struct dp_aux_backlight *bl = bl_get_data(bd); + u16 brightness = backlight_get_brightness(bd); + int ret = 0; + + if (!backlight_is_blank(bd)) { + if (!bl->enabled) { + drm_edp_backlight_enable(bl->aux, &bl->info, brightness); + bl->enabled = true; + return 0; + } + ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness); + } else { + if (bl->enabled) { + drm_edp_backlight_disable(bl->aux, &bl->info); + bl->enabled = false; + } + } + + return ret; +} + +static const struct backlight_ops dp_aux_bl_ops = { + .update_status = dp_aux_backlight_update_status, +}; + +/** + * drm_panel_dp_aux_backlight - create and use DP AUX backlight + * @panel: DRM panel + * @aux: The DP AUX channel to use + * + * Use this function to create and handle backlight if your panel + * supports backlight control over DP AUX channel using DPCD + * registers as per VESA's standard backlight control interface. + * + * When the panel is enabled backlight will be enabled after a + * successful call to &drm_panel_funcs.enable() + * + * When the panel is disabled backlight will be disabled before the + * call to &drm_panel_funcs.disable(). + * + * A typical implementation for a panel driver supporting backlight + * control over DP AUX will call this function at probe time. + * Backlight will then be handled transparently without requiring + * any intervention from the driver. + * + * drm_panel_dp_aux_backlight() must be called after the call to drm_panel_init(). + * + * Return: 0 on success or a negative error code on failure. + */ +int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux) +{ + struct dp_aux_backlight *bl; + struct backlight_properties props = { 0 }; + u16 current_level; + u8 current_mode; + u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE]; + int ret; + + if (!panel || !panel->dev || !aux) + return -EINVAL; + + ret = drm_dp_dpcd_read(aux, DP_EDP_DPCD_REV, edp_dpcd, + EDP_DISPLAY_CTL_CAP_SIZE); + if (ret < 0) + return ret; + + if (!drm_edp_backlight_supported(edp_dpcd)) { + DRM_DEV_INFO(panel->dev, "DP AUX backlight is not supported\n"); + return 0; + } + + bl = devm_kzalloc(panel->dev, sizeof(*bl), GFP_KERNEL); + if (!bl) + return -ENOMEM; + + bl->aux = aux; + + ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd, + ¤t_level, ¤t_mode); + if (ret < 0) + return ret; + + props.type = BACKLIGHT_RAW; + props.brightness = current_level; + props.max_brightness = bl->info.max; + + bl->base = devm_backlight_device_register(panel->dev, "dp_aux_backlight", + panel->dev, bl, + &dp_aux_bl_ops, &props); + if (IS_ERR(bl->base)) + return PTR_ERR(bl->base); + + panel->backlight = bl->base; + + return 0; +} +EXPORT_SYMBOL(drm_panel_dp_aux_backlight); #endif MODULE_AUTHOR("Thierry Reding "); diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index 33605c3f0eba..71aac751a032 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -32,6 +32,7 @@ struct backlight_device; struct device_node; struct drm_connector; struct drm_device; +struct drm_dp_aux; struct drm_panel; struct display_timing; @@ -64,8 +65,8 @@ enum drm_panel_orientation; * the panel. This is the job of the .unprepare() function. * * Backlight can be handled automatically if configured using - * drm_panel_of_backlight(). Then the driver does not need to implement the - * functionality to enable/disable backlight. + * drm_panel_of_backlight() or drm_panel_dp_aux_backlight(). Then the driver + * does not need to implement the functionality to enable/disable backlight. */ struct drm_panel_funcs { /** @@ -144,8 +145,8 @@ struct drm_panel { * Backlight device, used to turn on backlight after the call * to enable(), and to turn off backlight before the call to * disable(). - * backlight is set by drm_panel_of_backlight() and drivers - * shall not assign it. + * backlight is set by drm_panel_of_backlight() or + * drm_panel_dp_aux_backlight() and drivers shall not assign it. */ struct backlight_device *backlight; @@ -208,11 +209,18 @@ static inline int of_drm_get_panel_orientation(const struct device_node *np, #if IS_ENABLED(CONFIG_DRM_PANEL) && (IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \ (IS_MODULE(CONFIG_DRM) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE))) int drm_panel_of_backlight(struct drm_panel *panel); +int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux); #else static inline int drm_panel_of_backlight(struct drm_panel *panel) { return 0; } + +static inline int drm_panel_dp_aux_backlight(struct drm_panel *panel, + struct drm_dp_aux *aux) +{ + return 0; +} #endif #endif -- cgit v1.2.3 From 3667bbd7829059870dff1b6cb4c8eca5aa80e24d Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sat, 10 Jul 2021 10:42:40 +0200 Subject: drm: bridge: Mark deprecated operations in drm_bridge_funcs drm_bridge_funcs includes several duplicated operations as atomic variants have been added over time. New bridge drivers shall use the atomic variants - mark the deprecated operations to try to avoid usage in new bridge drivers. v2: - Drop out-dated comment about state in mode_set (Laurent) - Added missing "the" in a description Signed-off-by: Sam Ravnborg Cc: Laurent Pinchart Cc: Andrzej Hajda Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Acked-by: Maxime Ripard Reviewed-by: Laurent Pinchart Link: https://patchwork.freedesktop.org/patch/msgid/20210710084240.281063-1-sam@ravnborg.org --- include/drm/drm_bridge.h | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) (limited to 'include/drm') diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 2195daa289d2..46bdfa48c413 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -171,6 +171,11 @@ struct drm_bridge_funcs { * signals) feeding it is still running when this callback is called. * * The @disable callback is optional. + * + * NOTE: + * + * This is deprecated, do not use! + * New drivers shall use &drm_bridge_funcs.atomic_disable. */ void (*disable)(struct drm_bridge *bridge); @@ -190,6 +195,11 @@ struct drm_bridge_funcs { * called. * * The @post_disable callback is optional. + * + * NOTE: + * + * This is deprecated, do not use! + * New drivers shall use &drm_bridge_funcs.atomic_post_disable. */ void (*post_disable)(struct drm_bridge *bridge); @@ -215,9 +225,9 @@ struct drm_bridge_funcs { * * NOTE: * - * If a need arises to store and access modes adjusted for other - * locations than the connection between the CRTC and the first bridge, - * the DRM framework will have to be extended with DRM bridge states. + * This is deprecated, do not use! + * New drivers shall set their mode in the + * &drm_bridge_funcs.atomic_enable operation. */ void (*mode_set)(struct drm_bridge *bridge, const struct drm_display_mode *mode, @@ -239,6 +249,11 @@ struct drm_bridge_funcs { * there is one) when this callback is called. * * The @pre_enable callback is optional. + * + * NOTE: + * + * This is deprecated, do not use! + * New drivers shall use &drm_bridge_funcs.atomic_pre_enable. */ void (*pre_enable)(struct drm_bridge *bridge); @@ -259,6 +274,11 @@ struct drm_bridge_funcs { * chain if there is one. * * The @enable callback is optional. + * + * NOTE: + * + * This is deprecated, do not use! + * New drivers shall use &drm_bridge_funcs.atomic_enable. */ void (*enable)(struct drm_bridge *bridge); -- cgit v1.2.3 From b715650220311e50448cb499c71084ca8aeeeece Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Mon, 5 Jul 2021 09:46:30 +0200 Subject: drm/gem: Export implementation of shadow-plane helpers Export the implementation of duplicate, destroy and reset helpers for shadow-buffered plane state. Useful for drivers that subclass struct drm_shadow_plane_state. The exported functions are wrappers around plane-state implementation, but using them is the correct thing to do for drivers. Signed-off-by: Thomas Zimmermann Reviewed-by: Melissa Wen Link: https://patchwork.freedesktop.org/patch/msgid/20210705074633.9425-2-tzimmermann@suse.de --- drivers/gpu/drm/drm_gem_atomic_helper.c | 55 +++++++++++++++++++++++++++++++-- include/drm/drm_gem_atomic_helper.h | 6 ++++ 2 files changed, 58 insertions(+), 3 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c index bc9396f2a0ed..26af09b959d4 100644 --- a/drivers/gpu/drm/drm_gem_atomic_helper.c +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c @@ -182,6 +182,27 @@ EXPORT_SYMBOL(drm_gem_simple_display_pipe_prepare_fb); * Shadow-buffered Planes */ +/** + * __drm_gem_duplicate_shadow_plane_state - duplicates shadow-buffered plane state + * @plane: the plane + * @new_shadow_plane_state: the new shadow-buffered plane state + * + * This function duplicates shadow-buffered plane state. This is helpful for drivers + * that subclass struct drm_shadow_plane_state. + * + * The function does not duplicate existing mappings of the shadow buffers. + * Mappings are maintained during the atomic commit by the plane's prepare_fb + * and cleanup_fb helpers. See drm_gem_prepare_shadow_fb() and drm_gem_cleanup_shadow_fb() + * for corresponding helpers. + */ +void +__drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane, + struct drm_shadow_plane_state *new_shadow_plane_state) +{ + __drm_atomic_helper_plane_duplicate_state(plane, &new_shadow_plane_state->base); +} +EXPORT_SYMBOL(__drm_gem_duplicate_shadow_plane_state); + /** * drm_gem_duplicate_shadow_plane_state - duplicates shadow-buffered plane state * @plane: the plane @@ -211,12 +232,25 @@ drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane) new_shadow_plane_state = kzalloc(sizeof(*new_shadow_plane_state), GFP_KERNEL); if (!new_shadow_plane_state) return NULL; - __drm_atomic_helper_plane_duplicate_state(plane, &new_shadow_plane_state->base); + __drm_gem_duplicate_shadow_plane_state(plane, new_shadow_plane_state); return &new_shadow_plane_state->base; } EXPORT_SYMBOL(drm_gem_duplicate_shadow_plane_state); +/** + * __drm_gem_destroy_shadow_plane_state - cleans up shadow-buffered plane state + * @shadow_plane_state: the shadow-buffered plane state + * + * This function cleans up shadow-buffered plane state. Helpful for drivers that + * subclass struct drm_shadow_plane_state. + */ +void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state) +{ + __drm_atomic_helper_plane_destroy_state(&shadow_plane_state->base); +} +EXPORT_SYMBOL(__drm_gem_destroy_shadow_plane_state); + /** * drm_gem_destroy_shadow_plane_state - deletes shadow-buffered plane state * @plane: the plane @@ -232,11 +266,26 @@ void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane, struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); - __drm_atomic_helper_plane_destroy_state(&shadow_plane_state->base); + __drm_gem_destroy_shadow_plane_state(shadow_plane_state); kfree(shadow_plane_state); } EXPORT_SYMBOL(drm_gem_destroy_shadow_plane_state); +/** + * __drm_gem_reset_shadow_plane - resets a shadow-buffered plane + * @plane: the plane + * @shadow_plane_state: the shadow-buffered plane state + * + * This function resets state for shadow-buffered planes. Helpful + * for drivers that subclass struct drm_shadow_plane_state. + */ +void __drm_gem_reset_shadow_plane(struct drm_plane *plane, + struct drm_shadow_plane_state *shadow_plane_state) +{ + __drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base); +} +EXPORT_SYMBOL(__drm_gem_reset_shadow_plane); + /** * drm_gem_reset_shadow_plane - resets a shadow-buffered plane * @plane: the plane @@ -258,7 +307,7 @@ void drm_gem_reset_shadow_plane(struct drm_plane *plane) shadow_plane_state = kzalloc(sizeof(*shadow_plane_state), GFP_KERNEL); if (!shadow_plane_state) return; - __drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base); + __drm_gem_reset_shadow_plane(plane, shadow_plane_state); } EXPORT_SYMBOL(drm_gem_reset_shadow_plane); diff --git a/include/drm/drm_gem_atomic_helper.h b/include/drm/drm_gem_atomic_helper.h index cfc5adee3d13..d82c23622156 100644 --- a/include/drm/drm_gem_atomic_helper.h +++ b/include/drm/drm_gem_atomic_helper.h @@ -53,6 +53,12 @@ to_drm_shadow_plane_state(struct drm_plane_state *state) return container_of(state, struct drm_shadow_plane_state, base); } +void __drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane, + struct drm_shadow_plane_state *new_shadow_plane_state); +void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state); +void __drm_gem_reset_shadow_plane(struct drm_plane *plane, + struct drm_shadow_plane_state *shadow_plane_state); + void drm_gem_reset_shadow_plane(struct drm_plane *plane); struct drm_plane_state *drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane); void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane, -- cgit v1.2.3 From 072ed3431f5ba20cccdaf57ee950e36b8693e235 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Mon, 12 Jul 2021 08:00:44 -0700 Subject: drm/dp: Move panel DP AUX backlight support to drm_dp_helper MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We were getting a depmod error: depmod: ERROR: Cycle detected: drm_kms_helper -> drm -> drm_kms_helper It looks like the rule is that drm_kms_helper can call into drm, but drm can't call into drm_kms_helper. That means we've got to move the DP AUX backlight support into drm_dp_helper. NOTE: as part of this, I didn't try to do any renames of the main registration function. Even though it's in the drm_dp_helper, it still feels very parallel to drm_panel_of_backlight(). Fixes: 10f7b40e4f30 ("drm/panel: add basic DP AUX backlight support") Reported-by: Ville Syrjälä Reported-by: Thomas Zimmermann Signed-off-by: Douglas Anderson Reviewed-by: Rajeev Nandan Link: https://patchwork.freedesktop.org/patch/msgid/20210712075933.v2.1.I23eb4cc5a680341e7b3e791632a635566fa5806a@changeid --- drivers/gpu/drm/drm_dp_helper.c | 113 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_panel.c | 108 -------------------------------------- include/drm/drm_dp_helper.h | 16 ++++++ include/drm/drm_panel.h | 8 --- 4 files changed, 129 insertions(+), 116 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 24bbc710c825..e8eec20ab364 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -33,9 +33,17 @@ #include #include #include +#include #include "drm_crtc_helper_internal.h" +struct dp_aux_backlight { + struct backlight_device *base; + struct drm_dp_aux *aux; + struct drm_edp_backlight_info info; + bool enabled; +}; + /** * DOC: dp helpers * @@ -3462,3 +3470,108 @@ drm_edp_backlight_init(struct drm_dp_aux *aux, struct drm_edp_backlight_info *bl return 0; } EXPORT_SYMBOL(drm_edp_backlight_init); + +#if IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \ + (IS_MODULE(CONFIG_DRM_KMS_HELPER) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE)) + +static int dp_aux_backlight_update_status(struct backlight_device *bd) +{ + struct dp_aux_backlight *bl = bl_get_data(bd); + u16 brightness = backlight_get_brightness(bd); + int ret = 0; + + if (!backlight_is_blank(bd)) { + if (!bl->enabled) { + drm_edp_backlight_enable(bl->aux, &bl->info, brightness); + bl->enabled = true; + return 0; + } + ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness); + } else { + if (bl->enabled) { + drm_edp_backlight_disable(bl->aux, &bl->info); + bl->enabled = false; + } + } + + return ret; +} + +static const struct backlight_ops dp_aux_bl_ops = { + .update_status = dp_aux_backlight_update_status, +}; + +/** + * drm_panel_dp_aux_backlight - create and use DP AUX backlight + * @panel: DRM panel + * @aux: The DP AUX channel to use + * + * Use this function to create and handle backlight if your panel + * supports backlight control over DP AUX channel using DPCD + * registers as per VESA's standard backlight control interface. + * + * When the panel is enabled backlight will be enabled after a + * successful call to &drm_panel_funcs.enable() + * + * When the panel is disabled backlight will be disabled before the + * call to &drm_panel_funcs.disable(). + * + * A typical implementation for a panel driver supporting backlight + * control over DP AUX will call this function at probe time. + * Backlight will then be handled transparently without requiring + * any intervention from the driver. + * + * drm_panel_dp_aux_backlight() must be called after the call to drm_panel_init(). + * + * Return: 0 on success or a negative error code on failure. + */ +int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux) +{ + struct dp_aux_backlight *bl; + struct backlight_properties props = { 0 }; + u16 current_level; + u8 current_mode; + u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE]; + int ret; + + if (!panel || !panel->dev || !aux) + return -EINVAL; + + ret = drm_dp_dpcd_read(aux, DP_EDP_DPCD_REV, edp_dpcd, + EDP_DISPLAY_CTL_CAP_SIZE); + if (ret < 0) + return ret; + + if (!drm_edp_backlight_supported(edp_dpcd)) { + DRM_DEV_INFO(panel->dev, "DP AUX backlight is not supported\n"); + return 0; + } + + bl = devm_kzalloc(panel->dev, sizeof(*bl), GFP_KERNEL); + if (!bl) + return -ENOMEM; + + bl->aux = aux; + + ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd, + ¤t_level, ¤t_mode); + if (ret < 0) + return ret; + + props.type = BACKLIGHT_RAW; + props.brightness = current_level; + props.max_brightness = bl->info.max; + + bl->base = devm_backlight_device_register(panel->dev, "dp_aux_backlight", + panel->dev, bl, + &dp_aux_bl_ops, &props); + if (IS_ERR(bl->base)) + return PTR_ERR(bl->base); + + panel->backlight = bl->base; + + return 0; +} +EXPORT_SYMBOL(drm_panel_dp_aux_backlight); + +#endif diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index 4fa1e3bb1b78..f634371c717a 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -26,20 +26,12 @@ #include #include -#include #include #include static DEFINE_MUTEX(panel_lock); static LIST_HEAD(panel_list); -struct dp_aux_backlight { - struct backlight_device *base; - struct drm_dp_aux *aux; - struct drm_edp_backlight_info info; - bool enabled; -}; - /** * DOC: drm panel * @@ -350,106 +342,6 @@ int drm_panel_of_backlight(struct drm_panel *panel) return 0; } EXPORT_SYMBOL(drm_panel_of_backlight); - -static int dp_aux_backlight_update_status(struct backlight_device *bd) -{ - struct dp_aux_backlight *bl = bl_get_data(bd); - u16 brightness = backlight_get_brightness(bd); - int ret = 0; - - if (!backlight_is_blank(bd)) { - if (!bl->enabled) { - drm_edp_backlight_enable(bl->aux, &bl->info, brightness); - bl->enabled = true; - return 0; - } - ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness); - } else { - if (bl->enabled) { - drm_edp_backlight_disable(bl->aux, &bl->info); - bl->enabled = false; - } - } - - return ret; -} - -static const struct backlight_ops dp_aux_bl_ops = { - .update_status = dp_aux_backlight_update_status, -}; - -/** - * drm_panel_dp_aux_backlight - create and use DP AUX backlight - * @panel: DRM panel - * @aux: The DP AUX channel to use - * - * Use this function to create and handle backlight if your panel - * supports backlight control over DP AUX channel using DPCD - * registers as per VESA's standard backlight control interface. - * - * When the panel is enabled backlight will be enabled after a - * successful call to &drm_panel_funcs.enable() - * - * When the panel is disabled backlight will be disabled before the - * call to &drm_panel_funcs.disable(). - * - * A typical implementation for a panel driver supporting backlight - * control over DP AUX will call this function at probe time. - * Backlight will then be handled transparently without requiring - * any intervention from the driver. - * - * drm_panel_dp_aux_backlight() must be called after the call to drm_panel_init(). - * - * Return: 0 on success or a negative error code on failure. - */ -int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux) -{ - struct dp_aux_backlight *bl; - struct backlight_properties props = { 0 }; - u16 current_level; - u8 current_mode; - u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE]; - int ret; - - if (!panel || !panel->dev || !aux) - return -EINVAL; - - ret = drm_dp_dpcd_read(aux, DP_EDP_DPCD_REV, edp_dpcd, - EDP_DISPLAY_CTL_CAP_SIZE); - if (ret < 0) - return ret; - - if (!drm_edp_backlight_supported(edp_dpcd)) { - DRM_DEV_INFO(panel->dev, "DP AUX backlight is not supported\n"); - return 0; - } - - bl = devm_kzalloc(panel->dev, sizeof(*bl), GFP_KERNEL); - if (!bl) - return -ENOMEM; - - bl->aux = aux; - - ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd, - ¤t_level, ¤t_mode); - if (ret < 0) - return ret; - - props.type = BACKLIGHT_RAW; - props.brightness = current_level; - props.max_brightness = bl->info.max; - - bl->base = devm_backlight_device_register(panel->dev, "dp_aux_backlight", - panel->dev, bl, - &dp_aux_bl_ops, &props); - if (IS_ERR(bl->base)) - return PTR_ERR(bl->base); - - panel->backlight = bl->base; - - return 0; -} -EXPORT_SYMBOL(drm_panel_dp_aux_backlight); #endif MODULE_AUTHOR("Thierry Reding "); diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 729d5d82475e..a1b2d945def6 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -30,6 +30,7 @@ struct drm_device; struct drm_dp_aux; +struct drm_panel; /* * Unless otherwise noted, all values are from the DP 1.1a spec. Note that @@ -2200,6 +2201,21 @@ int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backli u16 level); int drm_edp_backlight_disable(struct drm_dp_aux *aux, const struct drm_edp_backlight_info *bl); +#if IS_ENABLED(CONFIG_DRM_KMS_HELPER) && (IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \ + (IS_MODULE(CONFIG_DRM_KMS_HELPER) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE))) + +int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux); + +#else + +static inline int drm_panel_dp_aux_backlight(struct drm_panel *panel, + struct drm_dp_aux *aux) +{ + return 0; +} + +#endif + #ifdef CONFIG_DRM_DP_CEC void drm_dp_cec_irq(struct drm_dp_aux *aux); void drm_dp_cec_register_connector(struct drm_dp_aux *aux, diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index 71aac751a032..4602f833eb51 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -32,7 +32,6 @@ struct backlight_device; struct device_node; struct drm_connector; struct drm_device; -struct drm_dp_aux; struct drm_panel; struct display_timing; @@ -209,18 +208,11 @@ static inline int of_drm_get_panel_orientation(const struct device_node *np, #if IS_ENABLED(CONFIG_DRM_PANEL) && (IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \ (IS_MODULE(CONFIG_DRM) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE))) int drm_panel_of_backlight(struct drm_panel *panel); -int drm_panel_dp_aux_backlight(struct drm_panel *panel, struct drm_dp_aux *aux); #else static inline int drm_panel_of_backlight(struct drm_panel *panel) { return 0; } - -static inline int drm_panel_dp_aux_backlight(struct drm_panel *panel, - struct drm_dp_aux *aux) -{ - return 0; -} #endif #endif -- cgit v1.2.3 From 51fdf0914f2689e7e2549da303bcb38843119b5c Mon Sep 17 00:00:00 2001 From: Jim Cromie Date: Wed, 14 Jul 2021 11:51:34 -0600 Subject: drm/print: fixup spelling in a comment s/prink/printk/ - no functional changes Signed-off-by: Jim Cromie Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210714175138.319514-2-jim.cromie@gmail.com --- include/drm/drm_print.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/drm') diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index 9b66be54dd16..15a089a87c22 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -327,7 +327,7 @@ static inline bool drm_debug_enabled(enum drm_debug_category category) /* * struct device based logging * - * Prefer drm_device based logging over device or prink based logging. + * Prefer drm_device based logging over device or printk based logging. */ __printf(3, 4) -- cgit v1.2.3 From 3abab27c322e0f2acf981595aa8040c9164dc9fb Mon Sep 17 00:00:00 2001 From: Charles Baylis Date: Fri, 16 Jul 2021 17:43:12 +0100 Subject: drm: Return -ENOTTY for non-drm ioctls drm: Return -ENOTTY for non-drm ioctls Return -ENOTTY from drm_ioctl() when userspace passes in a cmd number which doesn't relate to the drm subsystem. Glibc uses the TCGETS ioctl to implement isatty(), and without this change isatty() returns it incorrectly returns true for drm devices. To test run this command: $ if [ -t 0 ]; then echo is a tty; fi < /dev/dri/card0 which shows "is a tty" without this patch. This may also modify memory which the userspace application is not expecting. Signed-off-by: Charles Baylis Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/YPG3IBlzaMhfPqCr@stando.fishzet.co.uk --- drivers/gpu/drm/drm_ioctl.c | 3 +++ include/drm/drm_ioctl.h | 1 + 2 files changed, 4 insertions(+) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 98ae00661656..f454e0424086 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -834,6 +834,9 @@ long drm_ioctl(struct file *filp, if (drm_dev_is_unplugged(dev)) return -ENODEV; + if (DRM_IOCTL_TYPE(cmd) != DRM_IOCTL_BASE) + return -ENOTTY; + is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END; if (is_driver_ioctl) { diff --git a/include/drm/drm_ioctl.h b/include/drm/drm_ioctl.h index 10100a4bbe2a..afb27cb6a7bd 100644 --- a/include/drm/drm_ioctl.h +++ b/include/drm/drm_ioctl.h @@ -68,6 +68,7 @@ typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd, unsigned long arg); #define DRM_IOCTL_NR(n) _IOC_NR(n) +#define DRM_IOCTL_TYPE(n) _IOC_TYPE(n) #define DRM_MAJOR 226 /** -- cgit v1.2.3 From 0b0860a3cf5eccf183760b1177a1dcdb821b0b66 Mon Sep 17 00:00:00 2001 From: Desmond Cheong Zhi Xi Date: Mon, 12 Jul 2021 12:35:07 +0800 Subject: drm: serialize drm_file.master with a new spinlock Currently, drm_file.master pointers should be protected by drm_device.master_mutex when being dereferenced. This is because drm_file.master is not invariant for the lifetime of drm_file. If drm_file is not the creator of master, then drm_file.is_master is false, and a call to drm_setmaster_ioctl will invoke drm_new_set_master, which then allocates a new master for drm_file and puts the old master. Thus, without holding drm_device.master_mutex, the old value of drm_file.master could be freed while it is being used by another concurrent process. However, it is not always possible to lock drm_device.master_mutex to dereference drm_file.master. Through the fbdev emulation code, this might occur in a deep nest of other locks. But drm_device.master_mutex is also the outermost lock in the nesting hierarchy, so this leads to potential deadlocks. To address this, we introduce a new spin lock at the bottom of the lock hierarchy that only serializes drm_file.master. With this change, the value of drm_file.master changes only when both drm_device.master_mutex and drm_file.master_lookup_lock are held. Hence, any process holding either of those locks can ensure that the value of drm_file.master will not change concurrently. Since no lock depends on the new drm_file.master_lookup_lock, when drm_file.master is dereferenced, but drm_device.master_mutex cannot be held, we can safely protect the master pointer with drm_file.master_lookup_lock. Reported-by: Daniel Vetter Signed-off-by: Desmond Cheong Zhi Xi Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210712043508.11584-5-desmondcheongzx@gmail.com --- drivers/gpu/drm/drm_auth.c | 17 +++++++++++------ drivers/gpu/drm/drm_file.c | 1 + include/drm/drm_file.h | 12 +++++++++--- 3 files changed, 21 insertions(+), 9 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c index ab1863c5a5a0..30a239901b36 100644 --- a/drivers/gpu/drm/drm_auth.c +++ b/drivers/gpu/drm/drm_auth.c @@ -164,16 +164,18 @@ static void drm_set_master(struct drm_device *dev, struct drm_file *fpriv, static int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv) { struct drm_master *old_master; + struct drm_master *new_master; lockdep_assert_held_once(&dev->master_mutex); WARN_ON(fpriv->is_master); old_master = fpriv->master; - fpriv->master = drm_master_create(dev); - if (!fpriv->master) { - fpriv->master = old_master; + new_master = drm_master_create(dev); + if (!new_master) return -ENOMEM; - } + spin_lock(&fpriv->master_lookup_lock); + fpriv->master = new_master; + spin_unlock(&fpriv->master_lookup_lock); fpriv->is_master = 1; fpriv->authenticated = 1; @@ -332,10 +334,13 @@ int drm_master_open(struct drm_file *file_priv) * any master object for render clients */ mutex_lock(&dev->master_mutex); - if (!dev->master) + if (!dev->master) { ret = drm_new_set_master(dev, file_priv); - else + } else { + spin_lock(&file_priv->master_lookup_lock); file_priv->master = drm_master_get(dev->master); + spin_unlock(&file_priv->master_lookup_lock); + } mutex_unlock(&dev->master_mutex); return ret; diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index d4f0bac6f8f8..ceb1a9723855 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -176,6 +176,7 @@ struct drm_file *drm_file_alloc(struct drm_minor *minor) init_waitqueue_head(&file->event_wait); file->event_space = 4096; /* set aside 4k for event buffer */ + spin_lock_init(&file->master_lookup_lock); mutex_init(&file->event_read_lock); if (drm_core_check_feature(dev, DRIVER_GEM)) diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index b81b3bfb08c8..9b82988e3427 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -226,15 +226,21 @@ struct drm_file { /** * @master: * - * Master this node is currently associated with. Only relevant if - * drm_is_primary_client() returns true. Note that this only - * matches &drm_device.master if the master is the currently active one. + * Master this node is currently associated with. Protected by struct + * &drm_device.master_mutex, and serialized by @master_lookup_lock. + * + * Only relevant if drm_is_primary_client() returns true. Note that + * this only matches &drm_device.master if the master is the currently + * active one. * * See also @authentication and @is_master and the :ref:`section on * primary nodes and authentication `. */ struct drm_master *master; + /** @master_lock: Serializes @master. */ + spinlock_t master_lookup_lock; + /** @pid: Process that opened this file. */ struct pid *pid; -- cgit v1.2.3 From 56f0729a510f92151682ff6c89f69724d5595d6e Mon Sep 17 00:00:00 2001 From: Desmond Cheong Zhi Xi Date: Mon, 12 Jul 2021 12:35:08 +0800 Subject: drm: protect drm_master pointers in drm_lease.c drm_file->master pointers should be protected by drm_device.master_mutex or drm_file.master_lookup_lock when being dereferenced. However, in drm_lease.c, there are multiple instances where drm_file->master is accessed and dereferenced while neither lock is held. This makes drm_lease.c vulnerable to use-after-free bugs. We address this issue in 2 ways: 1. Add a new drm_file_get_master() function that calls drm_master_get on drm_file->master while holding on to drm_file.master_lookup_lock. Since drm_master_get increments the reference count of master, this prevents master from being freed until we unreference it with drm_master_put. 2. In each case where drm_file->master is directly accessed and eventually dereferenced in drm_lease.c, we wrap the access in a call to the new drm_file_get_master function, then unreference the master pointer once we are done using it. Reported-by: Daniel Vetter Signed-off-by: Desmond Cheong Zhi Xi Reviewed-by: Emil Velikov Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210712043508.11584-6-desmondcheongzx@gmail.com --- drivers/gpu/drm/drm_auth.c | 25 ++++++++++++++ drivers/gpu/drm/drm_lease.c | 81 ++++++++++++++++++++++++++++++++++----------- include/drm/drm_auth.h | 1 + include/drm/drm_file.h | 6 ++++ 4 files changed, 93 insertions(+), 20 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c index 30a239901b36..f00354bec3fb 100644 --- a/drivers/gpu/drm/drm_auth.c +++ b/drivers/gpu/drm/drm_auth.c @@ -389,6 +389,31 @@ struct drm_master *drm_master_get(struct drm_master *master) } EXPORT_SYMBOL(drm_master_get); +/** + * drm_file_get_master - reference &drm_file.master of @file_priv + * @file_priv: DRM file private + * + * Increments the reference count of @file_priv's &drm_file.master and returns + * the &drm_file.master. If @file_priv has no &drm_file.master, returns NULL. + * + * Master pointers returned from this function should be unreferenced using + * drm_master_put(). + */ +struct drm_master *drm_file_get_master(struct drm_file *file_priv) +{ + struct drm_master *master = NULL; + + spin_lock(&file_priv->master_lookup_lock); + if (!file_priv->master) + goto unlock; + master = drm_master_get(file_priv->master); + +unlock: + spin_unlock(&file_priv->master_lookup_lock); + return master; +} +EXPORT_SYMBOL(drm_file_get_master); + static void drm_master_destroy(struct kref *kref) { struct drm_master *master = container_of(kref, struct drm_master, refcount); diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c index 00fb433bcef1..92eac73d9001 100644 --- a/drivers/gpu/drm/drm_lease.c +++ b/drivers/gpu/drm/drm_lease.c @@ -106,10 +106,19 @@ static bool _drm_has_leased(struct drm_master *master, int id) */ bool _drm_lease_held(struct drm_file *file_priv, int id) { - if (!file_priv || !file_priv->master) + bool ret; + struct drm_master *master; + + if (!file_priv) return true; - return _drm_lease_held_master(file_priv->master, id); + master = drm_file_get_master(file_priv); + if (!master) + return true; + ret = _drm_lease_held_master(master, id); + drm_master_put(&master); + + return ret; } /** @@ -128,13 +137,22 @@ bool drm_lease_held(struct drm_file *file_priv, int id) struct drm_master *master; bool ret; - if (!file_priv || !file_priv->master || !file_priv->master->lessor) + if (!file_priv) return true; - master = file_priv->master; + master = drm_file_get_master(file_priv); + if (!master) + return true; + if (!master->lessor) { + ret = true; + goto out; + } mutex_lock(&master->dev->mode_config.idr_mutex); ret = _drm_lease_held_master(master, id); mutex_unlock(&master->dev->mode_config.idr_mutex); + +out: + drm_master_put(&master); return ret; } @@ -154,10 +172,16 @@ uint32_t drm_lease_filter_crtcs(struct drm_file *file_priv, uint32_t crtcs_in) int count_in, count_out; uint32_t crtcs_out = 0; - if (!file_priv || !file_priv->master || !file_priv->master->lessor) + if (!file_priv) return crtcs_in; - master = file_priv->master; + master = drm_file_get_master(file_priv); + if (!master) + return crtcs_in; + if (!master->lessor) { + crtcs_out = crtcs_in; + goto out; + } dev = master->dev; count_in = count_out = 0; @@ -176,6 +200,9 @@ uint32_t drm_lease_filter_crtcs(struct drm_file *file_priv, uint32_t crtcs_in) count_in++; } mutex_unlock(&master->dev->mode_config.idr_mutex); + +out: + drm_master_put(&master); return crtcs_out; } @@ -489,7 +516,7 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev, size_t object_count; int ret = 0; struct idr leases; - struct drm_master *lessor = lessor_priv->master; + struct drm_master *lessor; struct drm_master *lessee = NULL; struct file *lessee_file = NULL; struct file *lessor_file = lessor_priv->filp; @@ -501,12 +528,6 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev, if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EOPNOTSUPP; - /* Do not allow sub-leases */ - if (lessor->lessor) { - DRM_DEBUG_LEASE("recursive leasing not allowed\n"); - return -EINVAL; - } - /* need some objects */ if (cl->object_count == 0) { DRM_DEBUG_LEASE("no objects in lease\n"); @@ -518,12 +539,22 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev, return -EINVAL; } + lessor = drm_file_get_master(lessor_priv); + /* Do not allow sub-leases */ + if (lessor->lessor) { + DRM_DEBUG_LEASE("recursive leasing not allowed\n"); + ret = -EINVAL; + goto out_lessor; + } + object_count = cl->object_count; object_ids = memdup_user(u64_to_user_ptr(cl->object_ids), array_size(object_count, sizeof(__u32))); - if (IS_ERR(object_ids)) - return PTR_ERR(object_ids); + if (IS_ERR(object_ids)) { + ret = PTR_ERR(object_ids); + goto out_lessor; + } idr_init(&leases); @@ -534,14 +565,15 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev, if (ret) { DRM_DEBUG_LEASE("lease object lookup failed: %i\n", ret); idr_destroy(&leases); - return ret; + goto out_lessor; } /* Allocate a file descriptor for the lease */ fd = get_unused_fd_flags(cl->flags & (O_CLOEXEC | O_NONBLOCK)); if (fd < 0) { idr_destroy(&leases); - return fd; + ret = fd; + goto out_lessor; } DRM_DEBUG_LEASE("Creating lease\n"); @@ -577,6 +609,7 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev, /* Hook up the fd */ fd_install(fd, lessee_file); + drm_master_put(&lessor); DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl succeeded\n"); return 0; @@ -586,6 +619,8 @@ out_lessee: out_leases: put_unused_fd(fd); +out_lessor: + drm_master_put(&lessor); DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl failed: %d\n", ret); return ret; } @@ -608,7 +643,7 @@ int drm_mode_list_lessees_ioctl(struct drm_device *dev, struct drm_mode_list_lessees *arg = data; __u32 __user *lessee_ids = (__u32 __user *) (uintptr_t) (arg->lessees_ptr); __u32 count_lessees = arg->count_lessees; - struct drm_master *lessor = lessor_priv->master, *lessee; + struct drm_master *lessor, *lessee; int count; int ret = 0; @@ -619,6 +654,7 @@ int drm_mode_list_lessees_ioctl(struct drm_device *dev, if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EOPNOTSUPP; + lessor = drm_file_get_master(lessor_priv); DRM_DEBUG_LEASE("List lessees for %d\n", lessor->lessee_id); mutex_lock(&dev->mode_config.idr_mutex); @@ -642,6 +678,7 @@ int drm_mode_list_lessees_ioctl(struct drm_device *dev, arg->count_lessees = count; mutex_unlock(&dev->mode_config.idr_mutex); + drm_master_put(&lessor); return ret; } @@ -661,7 +698,7 @@ int drm_mode_get_lease_ioctl(struct drm_device *dev, struct drm_mode_get_lease *arg = data; __u32 __user *object_ids = (__u32 __user *) (uintptr_t) (arg->objects_ptr); __u32 count_objects = arg->count_objects; - struct drm_master *lessee = lessee_priv->master; + struct drm_master *lessee; struct idr *object_idr; int count; void *entry; @@ -675,6 +712,7 @@ int drm_mode_get_lease_ioctl(struct drm_device *dev, if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EOPNOTSUPP; + lessee = drm_file_get_master(lessee_priv); DRM_DEBUG_LEASE("get lease for %d\n", lessee->lessee_id); mutex_lock(&dev->mode_config.idr_mutex); @@ -702,6 +740,7 @@ int drm_mode_get_lease_ioctl(struct drm_device *dev, arg->count_objects = count; mutex_unlock(&dev->mode_config.idr_mutex); + drm_master_put(&lessee); return ret; } @@ -720,7 +759,7 @@ int drm_mode_revoke_lease_ioctl(struct drm_device *dev, void *data, struct drm_file *lessor_priv) { struct drm_mode_revoke_lease *arg = data; - struct drm_master *lessor = lessor_priv->master; + struct drm_master *lessor; struct drm_master *lessee; int ret = 0; @@ -730,6 +769,7 @@ int drm_mode_revoke_lease_ioctl(struct drm_device *dev, if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EOPNOTSUPP; + lessor = drm_file_get_master(lessor_priv); mutex_lock(&dev->mode_config.idr_mutex); lessee = _drm_find_lessee(lessor, arg->lessee_id); @@ -750,6 +790,7 @@ int drm_mode_revoke_lease_ioctl(struct drm_device *dev, fail: mutex_unlock(&dev->mode_config.idr_mutex); + drm_master_put(&lessor); return ret; } diff --git a/include/drm/drm_auth.h b/include/drm/drm_auth.h index 6bf8b2b78991..f99d3417f304 100644 --- a/include/drm/drm_auth.h +++ b/include/drm/drm_auth.h @@ -107,6 +107,7 @@ struct drm_master { }; struct drm_master *drm_master_get(struct drm_master *master); +struct drm_master *drm_file_get_master(struct drm_file *file_priv); void drm_master_put(struct drm_master **master); bool drm_is_current_master(struct drm_file *fpriv); diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index 9b82988e3427..726cfe0ff5f5 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -233,6 +233,12 @@ struct drm_file { * this only matches &drm_device.master if the master is the currently * active one. * + * When dereferencing this pointer, either hold struct + * &drm_device.master_mutex for the duration of the pointer's use, or + * use drm_file_get_master() if struct &drm_device.master_mutex is not + * currently held and there is no other need to hold it. This prevents + * @master from being freed during use. + * * See also @authentication and @is_master and the :ref:`section on * primary nodes and authentication `. */ -- cgit v1.2.3 From d0f56dc25afba6e08be2d2611d5d19f97821aa64 Mon Sep 17 00:00:00 2001 From: Tao Zhou Date: Tue, 13 Jul 2021 17:13:48 -0400 Subject: drm/amdgpu: add cyan_skillfish asic type Add cyan_skillfish asic family. Signed-off-by: Tao Zhou Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++ drivers/gpu/drm/amd/include/amd_shared.h | 1 + include/drm/amd_asic_type.h | 17 +++++++++-------- 3 files changed, 15 insertions(+), 8 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 5d2453cc880c..ba7b193ef0e9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -116,6 +116,7 @@ const char *amdgpu_asic_name[] = { "RENOIR", "ALDEBARAN", "NAVI10", + "CYAN_SKILLFISH", "NAVI14", "NAVI12", "SIENNA_CICHLID", @@ -1439,6 +1440,10 @@ static int amdgpu_device_init_apu_flags(struct amdgpu_device *adev) break; case CHIP_YELLOW_CARP: break; + case CHIP_CYAN_SKILLFISH: + if (adev->pdev->device == 0x13FE) + adev->apu_flags |= AMD_APU_IS_CYAN_SKILLFISH2; + break; default: return -EINVAL; } diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h index ff1d3d4a6488..257f280d3d53 100644 --- a/drivers/gpu/drm/amd/include/amd_shared.h +++ b/drivers/gpu/drm/amd/include/amd_shared.h @@ -47,6 +47,7 @@ enum amd_apu_flags { AMD_APU_IS_RENOIR = 0x00000008UL, AMD_APU_IS_GREEN_SARDINE = 0x00000010UL, AMD_APU_IS_VANGOGH = 0x00000020UL, + AMD_APU_IS_CYAN_SKILLFISH2 = 0x00000040UL, }; /** diff --git a/include/drm/amd_asic_type.h b/include/drm/amd_asic_type.h index 0bf0ad869eb9..0f66a0d9f06d 100644 --- a/include/drm/amd_asic_type.h +++ b/include/drm/amd_asic_type.h @@ -53,14 +53,15 @@ enum amd_asic_type { CHIP_RENOIR, /* 24 */ CHIP_ALDEBARAN, /* 25 */ CHIP_NAVI10, /* 26 */ - CHIP_NAVI14, /* 27 */ - CHIP_NAVI12, /* 28 */ - CHIP_SIENNA_CICHLID, /* 29 */ - CHIP_NAVY_FLOUNDER, /* 30 */ - CHIP_VANGOGH, /* 31 */ - CHIP_DIMGREY_CAVEFISH, /* 32 */ - CHIP_BEIGE_GOBY, /* 33 */ - CHIP_YELLOW_CARP, /* 34 */ + CHIP_CYAN_SKILLFISH, /* 27 */ + CHIP_NAVI14, /* 28 */ + CHIP_NAVI12, /* 29 */ + CHIP_SIENNA_CICHLID, /* 30 */ + CHIP_NAVY_FLOUNDER, /* 31 */ + CHIP_VANGOGH, /* 32 */ + CHIP_DIMGREY_CAVEFISH, /* 33 */ + CHIP_BEIGE_GOBY, /* 34 */ + CHIP_YELLOW_CARP, /* 35 */ CHIP_LAST, }; -- cgit v1.2.3 From 37408cd825a47b89c2302b88ad3c071f796a2ec0 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 16 Jul 2021 16:07:55 +0200 Subject: drm/gem: Provide drm_gem_fb_{begin,end}_cpu_access() helpers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implement helpers drm_gem_fb_begin_cpu_access() and _end_cpu_access(), which call the rsp dma-buf functions for all GEM BOs of the given framebuffer. Calls to dma_buf_end_cpu_access() can return an error code on failure, while drm_gem_fb_end_cpu_access() does not. The latter runs during DRM's atomic commit or during cleanup. Both cases don't allow for errors, so leave out the return value. v2: * fix typo in docs (Daniel) Signed-off-by: Thomas Zimmermann Reviewed-by: Daniel Vetter Reviewed-by: Noralf Trønnes Link: https://patchwork.freedesktop.org/patch/msgid/20210716140801.1215-2-tzimmermann@suse.de --- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 89 ++++++++++++++++++++++++++++ include/drm/drm_gem_framebuffer_helper.h | 6 ++ 2 files changed, 95 insertions(+) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index e2c68822e05c..67bc9edc1d98 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -306,6 +306,95 @@ drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, } EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty); +/** + * drm_gem_fb_begin_cpu_access - prepares GEM buffer objects for CPU access + * @fb: the framebuffer + * @dir: access mode + * + * Prepares a framebuffer's GEM buffer objects for CPU access. This function + * must be called before accessing the BO data within the kernel. For imported + * BOs, the function calls dma_buf_begin_cpu_access(). + * + * See drm_gem_fb_end_cpu_access() for signalling the end of CPU access. + * + * Returns: + * 0 on success, or a negative errno code otherwise. + */ +int drm_gem_fb_begin_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir) +{ + struct dma_buf_attachment *import_attach; + struct drm_gem_object *obj; + size_t i; + int ret, ret2; + + for (i = 0; i < ARRAY_SIZE(fb->obj); ++i) { + obj = drm_gem_fb_get_obj(fb, i); + if (!obj) + continue; + import_attach = obj->import_attach; + if (!import_attach) + continue; + ret = dma_buf_begin_cpu_access(import_attach->dmabuf, dir); + if (ret) + goto err_dma_buf_end_cpu_access; + } + + return 0; + +err_dma_buf_end_cpu_access: + while (i) { + --i; + obj = drm_gem_fb_get_obj(fb, i); + if (!obj) + continue; + import_attach = obj->import_attach; + if (!import_attach) + continue; + ret2 = dma_buf_end_cpu_access(import_attach->dmabuf, dir); + if (ret2) { + drm_err(fb->dev, + "dma_buf_end_cpu_access() failed during error handling: %d\n", + ret2); + } + } + + return ret; +} +EXPORT_SYMBOL(drm_gem_fb_begin_cpu_access); + +/** + * drm_gem_fb_end_cpu_access - signals end of CPU access to GEM buffer objects + * @fb: the framebuffer + * @dir: access mode + * + * Signals the end of CPU access to the given framebuffer's GEM buffer objects. This + * function must be paired with a corresponding call to drm_gem_fb_begin_cpu_access(). + * For imported BOs, the function calls dma_buf_end_cpu_access(). + * + * See also drm_gem_fb_begin_cpu_access(). + */ +void drm_gem_fb_end_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir) +{ + size_t i = ARRAY_SIZE(fb->obj); + struct dma_buf_attachment *import_attach; + struct drm_gem_object *obj; + int ret; + + while (i) { + --i; + obj = drm_gem_fb_get_obj(fb, i); + if (!obj) + continue; + import_attach = obj->import_attach; + if (!import_attach) + continue; + ret = dma_buf_end_cpu_access(import_attach->dmabuf, dir); + if (ret) + drm_err(fb->dev, "dma_buf_end_cpu_access() failed: %d\n", ret); + } +} +EXPORT_SYMBOL(drm_gem_fb_end_cpu_access); + static __u32 drm_gem_afbc_get_bpp(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd) { diff --git a/include/drm/drm_gem_framebuffer_helper.h b/include/drm/drm_gem_framebuffer_helper.h index 6bdffc7aa124..5705722f0855 100644 --- a/include/drm/drm_gem_framebuffer_helper.h +++ b/include/drm/drm_gem_framebuffer_helper.h @@ -1,6 +1,9 @@ #ifndef __DRM_GEM_FB_HELPER_H__ #define __DRM_GEM_FB_HELPER_H__ +#include +#include + struct drm_afbc_framebuffer; struct drm_device; struct drm_fb_helper_surface_size; @@ -34,6 +37,9 @@ struct drm_framebuffer * drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd); +int drm_gem_fb_begin_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir); +void drm_gem_fb_end_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir); + #define drm_is_afbc(modifier) \ (((modifier) & AFBC_VENDOR_AND_TYPE_MASK) == DRM_FORMAT_MOD_ARM_AFBC(0)) -- cgit v1.2.3 From 3012248fdfeec400accef73bd2957f6d12f87234 Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Wed, 21 Jul 2021 06:51:30 +0000 Subject: drm: document drm_property_enum.value for bitfields When a property has the type DRM_MODE_PROP_BITMASK, the value field stores a bitshift, not a bitmask, which can be surprising. Signed-off-by: Simon Ser Cc: Leandro Ribeiro Reviewed-by: Daniel Vetter Acked-by: Pekka Paalanen Link: https://patchwork.freedesktop.org/patch/msgid/NUZTPTKKZtAlDhxIXFB1qrUqWBYKapkBxCnb1S1bc3g@cp3-web-033.plabs.ch --- include/drm/drm_property.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'include/drm') diff --git a/include/drm/drm_property.h b/include/drm/drm_property.h index bbf5c1fdd7b0..65bc9710a470 100644 --- a/include/drm/drm_property.h +++ b/include/drm/drm_property.h @@ -31,7 +31,6 @@ /** * struct drm_property_enum - symbolic values for enumerations - * @value: numeric property value for this enum entry * @head: list of enum values, linked to &drm_property.enum_list * @name: symbolic name for the enum * @@ -39,6 +38,14 @@ * decoding for each value. This is used for example for the rotation property. */ struct drm_property_enum { + /** + * @value: numeric property value for this enum entry + * + * If the property has the type &DRM_MODE_PROP_BITMASK, @value stores a + * bitshift, not a bitmask. In other words, the enum entry is enabled + * if the bit number @value is set in the property's value. This enum + * entry has the bitmask ``1 << value``. + */ uint64_t value; struct list_head head; char name[DRM_PROP_NAME_LEN]; -- cgit v1.2.3 From 0f3b68b66a6deb41c3c0eb805bb3f407083d2f57 Mon Sep 17 00:00:00 2001 From: Nicolas Boichat Date: Tue, 27 Jul 2021 09:45:21 +0800 Subject: drm/dsi: Add _NO_ to MIPI_DSI_* flags disabling features Many of the DSI flags have names opposite to their actual effects, e.g. MIPI_DSI_MODE_EOT_PACKET means that EoT packets will actually be disabled. Fix this by including _NO_ in the flag names, e.g. MIPI_DSI_MODE_NO_EOT_PACKET. Signed-off-by: Nicolas Boichat Reviewed-by: Linus Walleij Reviewed-by: Robert Foss Reviewed-by: Laurent Pinchart Reviewed-by: Andrzej Hajda Reviewed-by: Xin Ji # anx7625.c Reviewed-by: Abhinav Kumar # msm/dsi Signed-off-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210727094435.v3.1.I629b2366a6591410359c7fcf6d385b474b705ca2@changeid --- drivers/gpu/drm/bridge/adv7511/adv7533.c | 2 +- drivers/gpu/drm/bridge/analogix/anx7625.c | 2 +- drivers/gpu/drm/bridge/cdns-dsi.c | 4 ++-- drivers/gpu/drm/bridge/lontium-lt8912b.c | 2 +- drivers/gpu/drm/bridge/tc358768.c | 2 +- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 8 ++++---- drivers/gpu/drm/mcde/mcde_dsi.c | 2 +- drivers/gpu/drm/mediatek/mtk_dsi.c | 4 ++-- drivers/gpu/drm/msm/dsi/dsi_host.c | 8 ++++---- drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c | 2 +- drivers/gpu/drm/panel/panel-dsi-cm.c | 2 +- drivers/gpu/drm/panel/panel-elida-kd35t133.c | 2 +- drivers/gpu/drm/panel/panel-khadas-ts050.c | 2 +- drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c | 2 +- drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c | 2 +- drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c | 2 +- drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c | 2 +- drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c | 4 ++-- drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 2 +- drivers/gpu/drm/panel/panel-simple.c | 2 +- drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c | 2 +- include/drm/drm_mipi_dsi.h | 8 ++++---- 22 files changed, 34 insertions(+), 34 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c index aa19d5a40e31..59d718bde8c4 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c @@ -165,7 +165,7 @@ int adv7533_attach_dsi(struct adv7511 *adv) dsi->lanes = adv->num_dsi_lanes; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | - MIPI_DSI_MODE_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE; + MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE; ret = mipi_dsi_attach(dsi); if (ret < 0) { diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index a3d82377066b..be987c836891 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1307,7 +1307,7 @@ static int anx7625_attach_dsi(struct anx7625_data *ctx) dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | - MIPI_DSI_MODE_EOT_PACKET | + MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE; if (mipi_dsi_attach(dsi) < 0) { diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c index b31281f76117..e6e331071a00 100644 --- a/drivers/gpu/drm/bridge/cdns-dsi.c +++ b/drivers/gpu/drm/bridge/cdns-dsi.c @@ -829,7 +829,7 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge) tmp = DIV_ROUND_UP(dsi_cfg.htotal, nlanes) - DIV_ROUND_UP(dsi_cfg.hsa, nlanes); - if (!(output->dev->mode_flags & MIPI_DSI_MODE_EOT_PACKET)) + if (!(output->dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) tmp -= DIV_ROUND_UP(DSI_EOT_PKT_SIZE, nlanes); tx_byte_period = DIV_ROUND_DOWN_ULL((u64)NSEC_PER_SEC * 8, @@ -902,7 +902,7 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge) tmp = readl(dsi->regs + MCTL_MAIN_DATA_CTL); tmp &= ~(IF_VID_SELECT_MASK | HOST_EOT_GEN | IF_VID_MODE); - if (!(output->dev->mode_flags & MIPI_DSI_MODE_EOT_PACKET)) + if (!(output->dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) tmp |= HOST_EOT_GEN; if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO) diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c index 76c720b535fb..1b0c7eaf6c84 100644 --- a/drivers/gpu/drm/bridge/lontium-lt8912b.c +++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c @@ -487,7 +487,7 @@ static int lt8912_attach_dsi(struct lt8912 *lt) dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM | - MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_NO_EOT_PACKET; ret = mipi_dsi_attach(dsi); if (ret < 0) { diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index 8ed8302d6bbb..320f95ae6077 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -825,7 +825,7 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) if (!(dsi_dev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) val |= TC358768_DSI_CONTROL_HSCKMD; - if (dsi_dev->mode_flags & MIPI_DSI_MODE_EOT_PACKET) + if (dsi_dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET) val |= TC358768_DSI_CONTROL_EOTDIS; tc358768_write(priv, TC358768_DSI_CONFW, val); diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 1d777d8c1a83..e39fac889edc 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -809,15 +809,15 @@ static int exynos_dsi_init_link(struct exynos_dsi *dsi) reg |= DSIM_AUTO_MODE; if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE) reg |= DSIM_HSE_MODE; - if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HFP)) + if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HFP)) reg |= DSIM_HFP_MODE; - if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HBP)) + if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HBP)) reg |= DSIM_HBP_MODE; - if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSA)) + if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HSA)) reg |= DSIM_HSA_MODE; } - if (!(dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET)) + if (!(dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) reg |= DSIM_EOT_DISABLE; switch (dsi->format) { diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c index 5aade1d13961..16a513c66886 100644 --- a/drivers/gpu/drm/mcde/mcde_dsi.c +++ b/drivers/gpu/drm/mcde/mcde_dsi.c @@ -760,7 +760,7 @@ static void mcde_dsi_start(struct mcde_dsi *d) DSI_MCTL_MAIN_DATA_CTL_BTA_EN | DSI_MCTL_MAIN_DATA_CTL_READ_EN | DSI_MCTL_MAIN_DATA_CTL_REG_TE_EN; - if (!(d->mdsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET)) + if (!(d->mdsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) val |= DSI_MCTL_MAIN_DATA_CTL_HOST_EOT_GEN; writel(val, d->regs + DSI_MCTL_MAIN_DATA_CTL); diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index ae403c67cbd9..93b40c245f00 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -404,7 +404,7 @@ static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi) if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) tmp_reg |= HSTX_CKLP_EN; - if (!(dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET)) + if (!(dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) tmp_reg |= DIS_EOT; writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL); @@ -481,7 +481,7 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi) timing->da_hs_zero + timing->da_hs_exit + 3; delta = dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST ? 18 : 12; - delta += dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET ? 2 : 0; + delta += dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET ? 2 : 0; horizontal_frontporch_byte = vm->hfront_porch * dsi_tmp_buf_bpp; horizontal_front_back_byte = horizontal_frontporch_byte + horizontal_backporch_byte; diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 8a10e4343281..6c3454fe4ee3 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -850,11 +850,11 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable, if (flags & MIPI_DSI_MODE_VIDEO) { if (flags & MIPI_DSI_MODE_VIDEO_HSE) data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE; - if (flags & MIPI_DSI_MODE_VIDEO_HFP) + if (flags & MIPI_DSI_MODE_VIDEO_NO_HFP) data |= DSI_VID_CFG0_HFP_POWER_STOP; - if (flags & MIPI_DSI_MODE_VIDEO_HBP) + if (flags & MIPI_DSI_MODE_VIDEO_NO_HBP) data |= DSI_VID_CFG0_HBP_POWER_STOP; - if (flags & MIPI_DSI_MODE_VIDEO_HSA) + if (flags & MIPI_DSI_MODE_VIDEO_NO_HSA) data |= DSI_VID_CFG0_HSA_POWER_STOP; /* Always set low power stop mode for BLLP * to let command engine send packets @@ -909,7 +909,7 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable, DSI_T_CLK_PRE_EXTEND_INC_BY_2_BYTECLK); data = 0; - if (!(flags & MIPI_DSI_MODE_EOT_PACKET)) + if (!(flags & MIPI_DSI_MODE_NO_EOT_PACKET)) data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND; dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data); diff --git a/drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c b/drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c index e95bc9f60b3f..44674ebedf59 100644 --- a/drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c +++ b/drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c @@ -302,7 +302,7 @@ static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi) dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_EOT_PACKET | + MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM; drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs, diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c index 5fbfb71ca3d9..da4a69067e18 100644 --- a/drivers/gpu/drm/panel/panel-dsi-cm.c +++ b/drivers/gpu/drm/panel/panel-dsi-cm.c @@ -574,7 +574,7 @@ static int dsicm_probe(struct mipi_dsi_device *dsi) dsi->lanes = 2; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS | - MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_NO_EOT_PACKET; dsi->hs_rate = ddata->panel_data->max_hs_rate; dsi->lp_rate = ddata->panel_data->max_lp_rate; diff --git a/drivers/gpu/drm/panel/panel-elida-kd35t133.c b/drivers/gpu/drm/panel/panel-elida-kd35t133.c index 4787f0833264..80227617a4d6 100644 --- a/drivers/gpu/drm/panel/panel-elida-kd35t133.c +++ b/drivers/gpu/drm/panel/panel-elida-kd35t133.c @@ -273,7 +273,7 @@ static int kd35t133_probe(struct mipi_dsi_device *dsi) dsi->lanes = 1; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET | + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_CLOCK_NON_CONTINUOUS; drm_panel_init(&ctx->panel, &dsi->dev, &kd35t133_funcs, diff --git a/drivers/gpu/drm/panel/panel-khadas-ts050.c b/drivers/gpu/drm/panel/panel-khadas-ts050.c index 8f6ac1a40c31..a3ec4cbdbf7a 100644 --- a/drivers/gpu/drm/panel/panel-khadas-ts050.c +++ b/drivers/gpu/drm/panel/panel-khadas-ts050.c @@ -809,7 +809,7 @@ static int khadas_ts050_panel_probe(struct mipi_dsi_device *dsi) dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; khadas_ts050 = devm_kzalloc(&dsi->dev, sizeof(*khadas_ts050), GFP_KERNEL); diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c index ed0d5f959037..a5a414920430 100644 --- a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c +++ b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c @@ -593,7 +593,7 @@ static int ltk050h3146w_probe(struct mipi_dsi_device *dsi) dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; drm_panel_init(&ctx->panel, &dsi->dev, <k050h3146w_funcs, DRM_MODE_CONNECTOR_DSI); diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c index 3c00e4f8f803..21e48923836d 100644 --- a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c +++ b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c @@ -442,7 +442,7 @@ static int ltk500hd1829_probe(struct mipi_dsi_device *dsi) dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; drm_panel_init(&ctx->panel, &dsi->dev, <k500hd1829_funcs, DRM_MODE_CONNECTOR_DSI); diff --git a/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c b/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c index 45b975dee587..198493a6eb6a 100644 --- a/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c +++ b/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c @@ -184,7 +184,7 @@ static int osd101t2587_panel_probe(struct mipi_dsi_device *dsi) dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | - MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_NO_EOT_PACKET; osd101t2587 = devm_kzalloc(&dsi->dev, sizeof(*osd101t2587), GFP_KERNEL); if (!osd101t2587) diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c b/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c index b962c817fb30..ccc8ed6fe3ae 100644 --- a/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c +++ b/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c @@ -446,7 +446,7 @@ static int s6e63j0x03_probe(struct mipi_dsi_device *dsi) dsi->lanes = 1; dsi->format = MIPI_DSI_FMT_RGB888; - dsi->mode_flags = MIPI_DSI_MODE_EOT_PACKET; + dsi->mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET; ctx->supplies[0].supply = "vdd3"; ctx->supplies[1].supply = "vci"; diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c index 527371120266..9b3599d6d2de 100644 --- a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c +++ b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c @@ -990,8 +990,8 @@ static int s6e8aa0_probe(struct mipi_dsi_device *dsi) dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST - | MIPI_DSI_MODE_VIDEO_HFP | MIPI_DSI_MODE_VIDEO_HBP - | MIPI_DSI_MODE_VIDEO_HSA | MIPI_DSI_MODE_EOT_PACKET + | MIPI_DSI_MODE_VIDEO_NO_HFP | MIPI_DSI_MODE_VIDEO_NO_HBP + | MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VSYNC_FLUSH | MIPI_DSI_MODE_VIDEO_AUTO_VERT; ret = s6e8aa0_parse_dt(ctx); diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c index 16dbf0f353ed..b937e24dac8e 100644 --- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c +++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c @@ -282,7 +282,7 @@ static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi) dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_CLOCK_NON_CONTINUOUS | - MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_NO_EOT_PACKET; sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL); if (!sharp_nt) diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 4dee8b7000bd..dff3dedd734b 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -5072,7 +5072,7 @@ static const struct panel_desc_dsi osd101t2045_53ts = { }, .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | - MIPI_DSI_MODE_EOT_PACKET, + MIPI_DSI_MODE_NO_EOT_PACKET, .format = MIPI_DSI_FMT_RGB888, .lanes = 4, }; diff --git a/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c b/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c index 55172d63a922..d17aae8b71d7 100644 --- a/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c +++ b/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c @@ -311,7 +311,7 @@ static int xpp055c272_probe(struct mipi_dsi_device *dsi) dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET; + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; drm_panel_init(&ctx->panel, &dsi->dev, &xpp055c272_funcs, DRM_MODE_CONNECTOR_DSI); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 849d3029e303..af7ba8071eb0 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -124,15 +124,15 @@ struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node); /* enable hsync-end packets in vsync-pulse and v-porch area */ #define MIPI_DSI_MODE_VIDEO_HSE BIT(4) /* disable hfront-porch area */ -#define MIPI_DSI_MODE_VIDEO_HFP BIT(5) +#define MIPI_DSI_MODE_VIDEO_NO_HFP BIT(5) /* disable hback-porch area */ -#define MIPI_DSI_MODE_VIDEO_HBP BIT(6) +#define MIPI_DSI_MODE_VIDEO_NO_HBP BIT(6) /* disable hsync-active area */ -#define MIPI_DSI_MODE_VIDEO_HSA BIT(7) +#define MIPI_DSI_MODE_VIDEO_NO_HSA BIT(7) /* flush display FIFO on vsync pulse */ #define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8) /* disable EoT packets in HS mode */ -#define MIPI_DSI_MODE_EOT_PACKET BIT(9) +#define MIPI_DSI_MODE_NO_EOT_PACKET BIT(9) /* device supports non-continuous clock behavior (DSI spec 5.6.1) */ #define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10) /* transmit data in low power */ -- cgit v1.2.3 From 6f11f37459d8f9f74ff1c299c0bedd50b458057a Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 23 Jul 2021 10:34:55 +0200 Subject: drm/plane: remove drm_helper_get_plane_damage_clips MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It's not used. Drivers should instead use the helpers anyway. Currently both vbox and i915 hand-roll this and it's not the greatest. vbox looks buggy, and i915 does a bit much that helpers would take care of I think. Also improve the kerneldocs while we're at it. Reviewed-by: José Roberto de Souza Cc: Ville Syrjälä Cc: Gwan-gyeong Mun Cc: José Roberto de Souza Cc: Hans de Goede Signed-off-by: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210723083457.696939-1-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_damage_helper.c | 2 +- include/drm/drm_damage_helper.h | 17 ----------------- include/drm/drm_plane.h | 10 +++++++--- include/drm/drm_rect.h | 3 +++ 4 files changed, 11 insertions(+), 21 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_damage_helper.c b/drivers/gpu/drm/drm_damage_helper.c index 3a4126dc2520..eb69b7123af5 100644 --- a/drivers/gpu/drm/drm_damage_helper.c +++ b/drivers/gpu/drm/drm_damage_helper.c @@ -282,7 +282,7 @@ drm_atomic_helper_damage_iter_init(struct drm_atomic_helper_damage_iter *iter, if (!state || !state->crtc || !state->fb || !state->visible) return; - iter->clips = drm_helper_get_plane_damage_clips(state); + iter->clips = (struct drm_rect *)drm_plane_get_damage_clips(state); iter->num_clips = drm_plane_get_damage_clips_count(state); /* Round down for x1/y1 and round up for x2/y2 to catch all pixels */ diff --git a/include/drm/drm_damage_helper.h b/include/drm/drm_damage_helper.h index 40c34a5bf149..1ae8bce6a5ce 100644 --- a/include/drm/drm_damage_helper.h +++ b/include/drm/drm_damage_helper.h @@ -82,21 +82,4 @@ bool drm_atomic_helper_damage_merged(const struct drm_plane_state *old_state, struct drm_plane_state *state, struct drm_rect *rect); -/** - * drm_helper_get_plane_damage_clips - Returns damage clips in &drm_rect. - * @state: Plane state. - * - * Returns plane damage rectangles in internal &drm_rect. Currently &drm_rect - * can be obtained by simply typecasting &drm_mode_rect. This is because both - * are signed 32 and during drm_atomic_check_only() it is verified that damage - * clips are inside fb. - * - * Return: Clips in plane fb_damage_clips blob property. - */ -static inline struct drm_rect * -drm_helper_get_plane_damage_clips(const struct drm_plane_state *state) -{ - return (struct drm_rect *)drm_plane_get_damage_clips(state); -} - #endif diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 1294610e84f4..7f7d5148310c 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -186,6 +186,9 @@ struct drm_plane_state { * since last plane update) as an array of &drm_mode_rect in framebuffer * coodinates of the attached framebuffer. Note that unlike plane src, * damage clips are not in 16.16 fixed point. + * + * See drm_plane_get_damage_clips() and + * drm_plane_get_damage_clips_count() for accessing these. */ struct drm_property_blob *fb_damage_clips; @@ -914,9 +917,10 @@ drm_plane_get_damage_clips_count(const struct drm_plane_state *state) * drm_plane_get_damage_clips - Returns damage clips. * @state: Plane state. * - * Note that this function returns uapi type &drm_mode_rect. Drivers might - * instead be interested in internal &drm_rect which can be obtained by calling - * drm_helper_get_plane_damage_clips(). + * Note that this function returns uapi type &drm_mode_rect. Drivers might want + * to use the helper functions drm_atomic_helper_damage_iter_init() and + * drm_atomic_helper_damage_iter_next() or drm_atomic_helper_damage_merged() if + * the driver can only handle a single damage region at most. * * Return: Damage clips in plane fb_damage_clips blob property. */ diff --git a/include/drm/drm_rect.h b/include/drm/drm_rect.h index 39f2deee709c..6f6e19bd4dac 100644 --- a/include/drm/drm_rect.h +++ b/include/drm/drm_rect.h @@ -39,6 +39,9 @@ * @x2: horizontal ending coordinate (exclusive) * @y1: vertical starting coordinate (inclusive) * @y2: vertical ending coordinate (exclusive) + * + * Note that this must match the layout of struct drm_mode_rect or the damage + * helpers like drm_atomic_helper_damage_iter_init() break. */ struct drm_rect { int x1, y1, x2, y2; -- cgit v1.2.3 From c7fcbf2513973208c03a2173cd25a2c48fec6605 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 23 Jul 2021 10:34:56 +0200 Subject: drm/plane: check that fb_damage is set up when used MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There's two stages of manual upload/invalidate displays: - just handling dirtyfb and uploading the entire fb all the time - looking at damage clips In the latter case we support it through fbdev emulation (with fb_defio), atomic property, and with the dirtfy clip rects. Make sure at least the atomic property is set up as the main official interface for this. Ideally we'd also check that drm_atomic_helper_dirtyfb() is used and that fbdev defio is set up, but that's quite a bit harder to do. Ideas very much welcome. From a cursor audit drivers seem to be getting this right mostly, but better to make sure. At least no one is bypassing the accessor function. v2: - use drm_warn_once with a meaningful warning string (José) - don't splat in the atomic check code for everyone (intel-gfx-ci) Reviewed-by: José Roberto de Souza (v1) Cc: Ville Syrjälä Cc: Gwan-gyeong Mun Cc: José Roberto de Souza Cc: Hans de Goede Signed-off-by: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210723083457.696939-2-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_atomic.c | 2 +- drivers/gpu/drm/drm_crtc_internal.h | 2 ++ drivers/gpu/drm/drm_plane.c | 50 +++++++++++++++++++++++++++++++++++++ include/drm/drm_plane.h | 36 +++----------------------- 4 files changed, 57 insertions(+), 33 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index a8bbb021684b..3ea2106c8d7d 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -659,7 +659,7 @@ static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state, return -ENOSPC; } - clips = drm_plane_get_damage_clips(new_plane_state); + clips = __drm_plane_get_damage_clips(new_plane_state); num_clips = drm_plane_get_damage_clips_count(new_plane_state); /* Make sure damage clips are valid and inside the fb. */ diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h index 54d4cf1233e9..6b17501a7412 100644 --- a/drivers/gpu/drm/drm_crtc_internal.h +++ b/drivers/gpu/drm/drm_crtc_internal.h @@ -260,6 +260,8 @@ int drm_plane_register_all(struct drm_device *dev); void drm_plane_unregister_all(struct drm_device *dev); int drm_plane_check_pixel_format(struct drm_plane *plane, u32 format, u64 modifier); +struct drm_mode_rect * +__drm_plane_get_damage_clips(const struct drm_plane_state *state); /* drm_bridge.c */ void drm_bridge_detach(struct drm_bridge *bridge); diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index b373958ecb30..f61315b61174 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -1397,6 +1397,56 @@ out: return ret; } +/** + * drm_plane_get_damage_clips_count - Returns damage clips count. + * @state: Plane state. + * + * Simple helper to get the number of &drm_mode_rect clips set by user-space + * during plane update. + * + * Return: Number of clips in plane fb_damage_clips blob property. + */ +unsigned int +drm_plane_get_damage_clips_count(const struct drm_plane_state *state) +{ + return (state && state->fb_damage_clips) ? + state->fb_damage_clips->length/sizeof(struct drm_mode_rect) : 0; +} +EXPORT_SYMBOL(drm_plane_get_damage_clips_count); + +struct drm_mode_rect * +__drm_plane_get_damage_clips(const struct drm_plane_state *state) +{ + return (struct drm_mode_rect *)((state && state->fb_damage_clips) ? + state->fb_damage_clips->data : NULL); +} + +/** + * drm_plane_get_damage_clips - Returns damage clips. + * @state: Plane state. + * + * Note that this function returns uapi type &drm_mode_rect. Drivers might want + * to use the helper functions drm_atomic_helper_damage_iter_init() and + * drm_atomic_helper_damage_iter_next() or drm_atomic_helper_damage_merged() if + * the driver can only handle a single damage region at most. + * + * Return: Damage clips in plane fb_damage_clips blob property. + */ +struct drm_mode_rect * +drm_plane_get_damage_clips(const struct drm_plane_state *state) +{ + struct drm_device *dev = state->plane->dev; + struct drm_mode_config *config = &dev->mode_config; + + /* check that drm_plane_enable_fb_damage_clips() was called */ + if (!drm_mode_obj_find_prop_id(&state->plane->base, + config->prop_fb_damage_clips->base.id)) + drm_warn_once(dev, "drm_plane_enable_fb_damage_clips() not called\n"); + + return __drm_plane_get_damage_clips(state); +} +EXPORT_SYMBOL(drm_plane_get_damage_clips); + struct drm_property * drm_create_scaling_filter_prop(struct drm_device *dev, unsigned int supported_filters) diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 7f7d5148310c..a2684aab8372 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -897,39 +897,11 @@ static inline struct drm_plane *drm_plane_find(struct drm_device *dev, bool drm_any_plane_has_format(struct drm_device *dev, u32 format, u64 modifier); -/** - * drm_plane_get_damage_clips_count - Returns damage clips count. - * @state: Plane state. - * - * Simple helper to get the number of &drm_mode_rect clips set by user-space - * during plane update. - * - * Return: Number of clips in plane fb_damage_clips blob property. - */ -static inline unsigned int -drm_plane_get_damage_clips_count(const struct drm_plane_state *state) -{ - return (state && state->fb_damage_clips) ? - state->fb_damage_clips->length/sizeof(struct drm_mode_rect) : 0; -} +unsigned int +drm_plane_get_damage_clips_count(const struct drm_plane_state *state); -/** - * drm_plane_get_damage_clips - Returns damage clips. - * @state: Plane state. - * - * Note that this function returns uapi type &drm_mode_rect. Drivers might want - * to use the helper functions drm_atomic_helper_damage_iter_init() and - * drm_atomic_helper_damage_iter_next() or drm_atomic_helper_damage_merged() if - * the driver can only handle a single damage region at most. - * - * Return: Damage clips in plane fb_damage_clips blob property. - */ -static inline struct drm_mode_rect * -drm_plane_get_damage_clips(const struct drm_plane_state *state) -{ - return (struct drm_mode_rect *)((state && state->fb_damage_clips) ? - state->fb_damage_clips->data : NULL); -} +struct drm_mode_rect * +drm_plane_get_damage_clips(const struct drm_plane_state *state); int drm_plane_create_scaling_filter_property(struct drm_plane *plane, unsigned int supported_filters); -- cgit v1.2.3 From ba6cd766e0bf933611dc66fcb86f72ac80a446bc Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 23 Jul 2021 10:34:57 +0200 Subject: drm/plane: Move drm_plane_enable_fb_damage_clips into core MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We're trying to have a fairly strict split between core functionality that defines the uapi, including the docs, and the helper functions to implement it. Move drm_plane_enable_fb_damage_clips and associated kerneldoc into drm_plane from drm_damage_helper.c to fix this. Reviewed-by: José Roberto de Souza Cc: Ville Syrjälä Cc: Gwan-gyeong Mun Cc: José Roberto de Souza Cc: Hans de Goede Signed-off-by: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210723083457.696939-3-daniel.vetter@ffwll.ch --- Documentation/gpu/drm-kms.rst | 4 +-- drivers/gpu/drm/drm_damage_helper.c | 54 ------------------------------------- drivers/gpu/drm/drm_plane.c | 54 +++++++++++++++++++++++++++++++++++++ include/drm/drm_damage_helper.h | 1 - include/drm/drm_plane.h | 3 ++- 5 files changed, 58 insertions(+), 58 deletions(-) (limited to 'include/drm') diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst index 12e25119e563..0cc21f6aaef5 100644 --- a/Documentation/gpu/drm-kms.rst +++ b/Documentation/gpu/drm-kms.rst @@ -537,8 +537,8 @@ Plane Composition Properties Damage Tracking Properties -------------------------- -.. kernel-doc:: drivers/gpu/drm/drm_damage_helper.c - :doc: overview +.. kernel-doc:: drivers/gpu/drm/drm_plane.c + :doc: damage tracking Color Management Properties --------------------------- diff --git a/drivers/gpu/drm/drm_damage_helper.c b/drivers/gpu/drm/drm_damage_helper.c index eb69b7123af5..245959dad7bb 100644 --- a/drivers/gpu/drm/drm_damage_helper.c +++ b/drivers/gpu/drm/drm_damage_helper.c @@ -34,44 +34,6 @@ #include #include -/** - * DOC: overview - * - * FB_DAMAGE_CLIPS is an optional plane property which provides a means to - * specify a list of damage rectangles on a plane in framebuffer coordinates of - * the framebuffer attached to the plane. In current context damage is the area - * of plane framebuffer that has changed since last plane update (also called - * page-flip), irrespective of whether currently attached framebuffer is same as - * framebuffer attached during last plane update or not. - * - * FB_DAMAGE_CLIPS is a hint to kernel which could be helpful for some drivers - * to optimize internally especially for virtual devices where each framebuffer - * change needs to be transmitted over network, usb, etc. - * - * Since FB_DAMAGE_CLIPS is a hint so it is an optional property. User-space can - * ignore damage clips property and in that case driver will do a full plane - * update. In case damage clips are provided then it is guaranteed that the area - * inside damage clips will be updated to plane. For efficiency driver can do - * full update or can update more than specified in damage clips. Since driver - * is free to read more, user-space must always render the entire visible - * framebuffer. Otherwise there can be corruptions. Also, if a user-space - * provides damage clips which doesn't encompass the actual damage to - * framebuffer (since last plane update) can result in incorrect rendering. - * - * FB_DAMAGE_CLIPS is a blob property with the layout of blob data is simply an - * array of &drm_mode_rect. Unlike plane &drm_plane_state.src coordinates, - * damage clips are not in 16.16 fixed point. Similar to plane src in - * framebuffer, damage clips cannot be negative. In damage clip, x1/y1 are - * inclusive and x2/y2 are exclusive. While kernel does not error for overlapped - * damage clips, it is strongly discouraged. - * - * Drivers that are interested in damage interface for plane should enable - * FB_DAMAGE_CLIPS property by calling drm_plane_enable_fb_damage_clips(). - * Drivers implementing damage can use drm_atomic_helper_damage_iter_init() and - * drm_atomic_helper_damage_iter_next() helper iterator function to get damage - * rectangles clipped to &drm_plane_state.src. - */ - static void convert_clip_rect_to_rect(const struct drm_clip_rect *src, struct drm_mode_rect *dest, uint32_t num_clips, uint32_t src_inc) @@ -87,22 +49,6 @@ static void convert_clip_rect_to_rect(const struct drm_clip_rect *src, } } -/** - * drm_plane_enable_fb_damage_clips - Enables plane fb damage clips property. - * @plane: Plane on which to enable damage clips property. - * - * This function lets driver to enable the damage clips property on a plane. - */ -void drm_plane_enable_fb_damage_clips(struct drm_plane *plane) -{ - struct drm_device *dev = plane->dev; - struct drm_mode_config *config = &dev->mode_config; - - drm_object_attach_property(&plane->base, config->prop_fb_damage_clips, - 0); -} -EXPORT_SYMBOL(drm_plane_enable_fb_damage_clips); - /** * drm_atomic_helper_check_plane_damage - Verify plane damage on atomic_check. * @state: The driver state object. diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index f61315b61174..f5fe8255597c 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -1397,6 +1397,60 @@ out: return ret; } +/** + * DOC: damage tracking + * + * FB_DAMAGE_CLIPS is an optional plane property which provides a means to + * specify a list of damage rectangles on a plane in framebuffer coordinates of + * the framebuffer attached to the plane. In current context damage is the area + * of plane framebuffer that has changed since last plane update (also called + * page-flip), irrespective of whether currently attached framebuffer is same as + * framebuffer attached during last plane update or not. + * + * FB_DAMAGE_CLIPS is a hint to kernel which could be helpful for some drivers + * to optimize internally especially for virtual devices where each framebuffer + * change needs to be transmitted over network, usb, etc. + * + * Since FB_DAMAGE_CLIPS is a hint so it is an optional property. User-space can + * ignore damage clips property and in that case driver will do a full plane + * update. In case damage clips are provided then it is guaranteed that the area + * inside damage clips will be updated to plane. For efficiency driver can do + * full update or can update more than specified in damage clips. Since driver + * is free to read more, user-space must always render the entire visible + * framebuffer. Otherwise there can be corruptions. Also, if a user-space + * provides damage clips which doesn't encompass the actual damage to + * framebuffer (since last plane update) can result in incorrect rendering. + * + * FB_DAMAGE_CLIPS is a blob property with the layout of blob data is simply an + * array of &drm_mode_rect. Unlike plane &drm_plane_state.src coordinates, + * damage clips are not in 16.16 fixed point. Similar to plane src in + * framebuffer, damage clips cannot be negative. In damage clip, x1/y1 are + * inclusive and x2/y2 are exclusive. While kernel does not error for overlapped + * damage clips, it is strongly discouraged. + * + * Drivers that are interested in damage interface for plane should enable + * FB_DAMAGE_CLIPS property by calling drm_plane_enable_fb_damage_clips(). + * Drivers implementing damage can use drm_atomic_helper_damage_iter_init() and + * drm_atomic_helper_damage_iter_next() helper iterator function to get damage + * rectangles clipped to &drm_plane_state.src. + */ + +/** + * drm_plane_enable_fb_damage_clips - Enables plane fb damage clips property. + * @plane: Plane on which to enable damage clips property. + * + * This function lets driver to enable the damage clips property on a plane. + */ +void drm_plane_enable_fb_damage_clips(struct drm_plane *plane) +{ + struct drm_device *dev = plane->dev; + struct drm_mode_config *config = &dev->mode_config; + + drm_object_attach_property(&plane->base, config->prop_fb_damage_clips, + 0); +} +EXPORT_SYMBOL(drm_plane_enable_fb_damage_clips); + /** * drm_plane_get_damage_clips_count - Returns damage clips count. * @state: Plane state. diff --git a/include/drm/drm_damage_helper.h b/include/drm/drm_damage_helper.h index 1ae8bce6a5ce..effda42cce31 100644 --- a/include/drm/drm_damage_helper.h +++ b/include/drm/drm_damage_helper.h @@ -64,7 +64,6 @@ struct drm_atomic_helper_damage_iter { bool full_update; }; -void drm_plane_enable_fb_damage_clips(struct drm_plane *plane); void drm_atomic_helper_check_plane_damage(struct drm_atomic_state *state, struct drm_plane_state *plane_state); int drm_atomic_helper_dirtyfb(struct drm_framebuffer *fb, diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index a2684aab8372..fed97e35626f 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -897,9 +897,10 @@ static inline struct drm_plane *drm_plane_find(struct drm_device *dev, bool drm_any_plane_has_format(struct drm_device *dev, u32 format, u64 modifier); + +void drm_plane_enable_fb_damage_clips(struct drm_plane *plane); unsigned int drm_plane_get_damage_clips_count(const struct drm_plane_state *state); - struct drm_mode_rect * drm_plane_get_damage_clips(const struct drm_plane_state *state); -- cgit v1.2.3 From 390ad4212197558edfba62557c76b560871dcbc3 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Tue, 27 Jul 2021 18:06:09 -0700 Subject: drm: Drop drm_gem_object_put_locked() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Now that no one is using it, remove it. Signed-off-by: Rob Clark Acked-by: Christian König Reviewed-by: Daniel Vetter Link: https://lore.kernel.org/r/20210728010632.2633470-5-robdclark@gmail.com Signed-off-by: Rob Clark --- drivers/gpu/drm/drm_gem.c | 22 ---------------------- include/drm/drm_gem.h | 2 -- 2 files changed, 24 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index d62fb1a3c916..a34525332bef 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -973,28 +973,6 @@ drm_gem_object_free(struct kref *kref) } EXPORT_SYMBOL(drm_gem_object_free); -/** - * drm_gem_object_put_locked - release a GEM buffer object reference - * @obj: GEM buffer object - * - * This releases a reference to @obj. Callers must hold the - * &drm_device.struct_mutex lock when calling this function, even when the - * driver doesn't use &drm_device.struct_mutex for anything. - * - * For drivers not encumbered with legacy locking use - * drm_gem_object_put() instead. - */ -void -drm_gem_object_put_locked(struct drm_gem_object *obj) -{ - if (obj) { - WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); - - kref_put(&obj->refcount, drm_gem_object_free); - } -} -EXPORT_SYMBOL(drm_gem_object_put_locked); - /** * drm_gem_vm_open - vma->ops->open implementation for GEM * @vma: VM area structure diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 240049566592..35e7f44c2a75 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -384,8 +384,6 @@ drm_gem_object_put(struct drm_gem_object *obj) __drm_gem_object_put(obj); } -void drm_gem_object_put_locked(struct drm_gem_object *obj); - int drm_gem_handle_create(struct drm_file *file_priv, struct drm_gem_object *obj, u32 *handlep); -- cgit v1.2.3 From 5bcc48395b9f35dace564de47fcf434cdb67a8e1 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 14 May 2020 04:03:07 +0300 Subject: drm: bridge: dw-hdmi: Attach to next bridge if available On all platforms except i.MX and Rockchip, the dw-hdmi DT bindings require a video output port connected to an HDMI sink (most likely an HDMI connector, in rare cases another bridges converting HDMI to another protocol). For those platforms, retrieve the next bridge and attach it from the dw-hdmi bridge attach handler. Signed-off-by: Laurent Pinchart Reviewed-by: Neil Armstrong Tested-by: Kieran Bingham # On V3U Reviewed-by: Kieran Bingham --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 54 ++++++++++++++++++++++++++++++- include/drm/bridge/dw_hdmi.h | 2 ++ 2 files changed, 55 insertions(+), 1 deletion(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index 77af49248069..f08d0fded61f 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -143,6 +143,7 @@ struct dw_hdmi_phy_data { struct dw_hdmi { struct drm_connector connector; struct drm_bridge bridge; + struct drm_bridge *next_bridge; unsigned int version; @@ -2775,7 +2776,8 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge, struct dw_hdmi *hdmi = bridge->driver_private; if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) - return 0; + return drm_bridge_attach(bridge->encoder, hdmi->next_bridge, + bridge, flags); return dw_hdmi_connector_create(hdmi); } @@ -3160,6 +3162,52 @@ static void dw_hdmi_init_hw(struct dw_hdmi *hdmi) /* ----------------------------------------------------------------------------- * Probe/remove API, used from platforms based on the DRM bridge API. */ + +static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi) +{ + struct device_node *endpoint; + struct device_node *remote; + + if (!hdmi->plat_data->output_port) + return 0; + + endpoint = of_graph_get_endpoint_by_regs(hdmi->dev->of_node, + hdmi->plat_data->output_port, + -1); + if (!endpoint) { + /* + * On platforms whose bindings don't make the output port + * mandatory (such as Rockchip) the plat_data->output_port + * field isn't set, so it's safe to make this a fatal error. + */ + dev_err(hdmi->dev, "Missing endpoint in port@%u\n", + hdmi->plat_data->output_port); + return -ENODEV; + } + + remote = of_graph_get_remote_port_parent(endpoint); + of_node_put(endpoint); + if (!remote) { + dev_err(hdmi->dev, "Endpoint in port@%u unconnected\n", + hdmi->plat_data->output_port); + return -ENODEV; + } + + if (!of_device_is_available(remote)) { + dev_err(hdmi->dev, "port@%u remote device is disabled\n", + hdmi->plat_data->output_port); + of_node_put(remote); + return -ENODEV; + } + + hdmi->next_bridge = of_drm_find_bridge(remote); + of_node_put(remote); + if (!hdmi->next_bridge) + return -EPROBE_DEFER; + + return 0; +} + struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev, const struct dw_hdmi_plat_data *plat_data) { @@ -3196,6 +3244,10 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev, mutex_init(&hdmi->cec_notifier_mutex); spin_lock_init(&hdmi->audio_lock); + ret = dw_hdmi_parse_dt(hdmi); + if (ret < 0) + return ERR_PTR(ret); + ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0); if (ddc_node) { hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node); diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index 6a5716655619..2a1f85f9a8a3 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -126,6 +126,8 @@ struct dw_hdmi_phy_ops { struct dw_hdmi_plat_data { struct regmap *regm; + unsigned int output_port; + unsigned long input_bus_encoding; bool use_drm_infoframe; bool ycbcr_420_allowed; -- cgit v1.2.3 From d793b8f732d6acbc6390be7342fb2e92b069dc7f Mon Sep 17 00:00:00 2001 From: Desmond Cheong Zhi Xi Date: Wed, 28 Jul 2021 18:27:39 +0800 Subject: drm: clarify usage of drm leases We make the following changes to the documentation of drm leases to make it easier to reason about their usage. In particular, we clarify the lifetime and locking rules of lease fields in drm_master: 1. Make it clear that &drm_device.mode_config.idr_mutex protects the lease idr and list structures for drm_master. The lessor field itself doesn't need to be protected as it doesn't change after it's set in drm_lease_create. 2. Add descriptions for the lifetime of lessors and leases. 3. Add an overview DOC: section in drm-uapi.rst that defines the terminology for drm leasing, and explains how leases work and why they're used. Signed-off-by: Desmond Cheong Zhi Xi Reviewed-by: Daniel Vetter Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210728102739.441543-1-desmondcheongzx@gmail.com --- Documentation/gpu/drm-uapi.rst | 9 ++++++ drivers/gpu/drm/drm_lease.c | 51 ++++++++++++++++++++++++++++++++ include/drm/drm_auth.h | 67 +++++++++++++++++++++++++++++++++++------- 3 files changed, 116 insertions(+), 11 deletions(-) (limited to 'include/drm') diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst index 7e51dd40bf6e..199afb503ab1 100644 --- a/Documentation/gpu/drm-uapi.rst +++ b/Documentation/gpu/drm-uapi.rst @@ -37,6 +37,15 @@ Primary Nodes, DRM Master and Authentication .. kernel-doc:: include/drm/drm_auth.h :internal: + +.. _drm_leasing: + +DRM Display Resource Leasing +============================ + +.. kernel-doc:: drivers/gpu/drm/drm_lease.c + :doc: drm leasing + Open-Source Userspace Requirements ================================== diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c index 92eac73d9001..79be797e8689 100644 --- a/drivers/gpu/drm/drm_lease.c +++ b/drivers/gpu/drm/drm_lease.c @@ -15,6 +15,57 @@ #include "drm_crtc_internal.h" #include "drm_internal.h" +/** + * DOC: drm leasing + * + * DRM leases provide information about whether a DRM master may control a DRM + * mode setting object. This enables the creation of multiple DRM masters that + * manage subsets of display resources. + * + * The original DRM master of a device 'owns' the available drm resources. It + * may create additional DRM masters and 'lease' resources which it controls + * to the new DRM master. This gives the new DRM master control over the + * leased resources until the owner revokes the lease, or the new DRM master + * is closed. Some helpful terminology: + * + * - An 'owner' is a &struct drm_master that is not leasing objects from + * another &struct drm_master, and hence 'owns' the objects. The owner can be + * identified as the &struct drm_master for which &drm_master.lessor is NULL. + * + * - A 'lessor' is a &struct drm_master which is leasing objects to one or more + * other &struct drm_master. Currently, lessees are not allowed to + * create sub-leases, hence the lessor is the same as the owner. + * + * - A 'lessee' is a &struct drm_master which is leasing objects from some + * other &struct drm_master. Each lessee only leases resources from a single + * lessor recorded in &drm_master.lessor, and holds the set of objects that + * it is leasing in &drm_master.leases. + * + * - A 'lease' is a contract between the lessor and lessee that identifies + * which resources may be controlled by the lessee. All of the resources + * that are leased must be owned by or leased to the lessor, and lessors are + * not permitted to lease the same object to multiple lessees. + * + * The set of objects any &struct drm_master 'controls' is limited to the set + * of objects it leases (for lessees) or all objects (for owners). + * + * Objects not controlled by a &struct drm_master cannot be modified through + * the various state manipulating ioctls, and any state reported back to user + * space will be edited to make them appear idle and/or unusable. For + * instance, connectors always report 'disconnected', while encoders + * report no possible crtcs or clones. + * + * Since each lessee may lease objects from a single lessor, display resource + * leases form a tree of &struct drm_master. As lessees are currently not + * allowed to create sub-leases, the tree depth is limited to 1. All of + * these get activated simultaneously when the top level device owner changes + * through the SETMASTER or DROPMASTER IOCTL, so &drm_device.master points to + * the owner at the top of the lease tree (i.e. the &struct drm_master for which + * &drm_master.lessor is NULL). The full list of lessees that are leasing + * objects from the owner can be searched via the owner's + * &drm_master.lessee_idr. + */ + #define drm_for_each_lessee(lessee, lessor) \ list_for_each_entry((lessee), &(lessor)->lessees, lessee_list) diff --git a/include/drm/drm_auth.h b/include/drm/drm_auth.h index f99d3417f304..ba248ca8866f 100644 --- a/include/drm/drm_auth.h +++ b/include/drm/drm_auth.h @@ -58,12 +58,6 @@ struct drm_lock_data { * @refcount: Refcount for this master object. * @dev: Link back to the DRM device * @driver_priv: Pointer to driver-private information. - * @lessor: Lease holder - * @lessee_id: id for lessees. Owners always have id 0 - * @lessee_list: other lessees of the same master - * @lessees: drm_masters leasing from this one - * @leases: Objects leased to this drm_master. - * @lessee_idr: All lessees under this owner (only used where lessor == NULL) * * Note that master structures are only relevant for the legacy/primary device * nodes, hence there can only be one per device, not one per drm_minor. @@ -88,17 +82,68 @@ struct drm_master { struct idr magic_map; void *driver_priv; - /* Tree of display resource leases, each of which is a drm_master struct - * All of these get activated simultaneously, so drm_device master points - * at the top of the tree (for which lessor is NULL). Protected by - * &drm_device.mode_config.idr_mutex. + /** + * @lessor: + * + * Lease grantor, only set if this &struct drm_master represents a + * lessee holding a lease of objects from @lessor. Full owners of the + * device have this set to NULL. + * + * The lessor does not change once it's set in drm_lease_create(), and + * each lessee holds a reference to its lessor that it releases upon + * being destroyed in drm_lease_destroy(). + * + * See also the :ref:`section on display resource leasing + * `. */ - struct drm_master *lessor; + + /** + * @lessee_id: + * + * ID for lessees. Owners (i.e. @lessor is NULL) always have ID 0. + * Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex. + */ int lessee_id; + + /** + * @lessee_list: + * + * List entry of lessees of @lessor, where they are linked to @lessees. + * Not used for owners. Protected by &drm_device.mode_config's + * &drm_mode_config.idr_mutex. + */ struct list_head lessee_list; + + /** + * @lessees: + * + * List of drm_masters leasing from this one. Protected by + * &drm_device.mode_config's &drm_mode_config.idr_mutex. + * + * This list is empty if no leases have been granted, or if all lessees + * have been destroyed. Since lessors are referenced by all their + * lessees, this master cannot be destroyed unless the list is empty. + */ struct list_head lessees; + + /** + * @leases: + * + * Objects leased to this drm_master. Protected by + * &drm_device.mode_config's &drm_mode_config.idr_mutex. + * + * Objects are leased all together in drm_lease_create(), and are + * removed all together when the lease is revoked. + */ struct idr leases; + + /** + * @lessee_idr: + * + * All lessees under this owner (only used where @lessor is NULL). + * Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex. + */ struct idr lessee_idr; /* private: */ #if IS_ENABLED(CONFIG_DRM_LEGACY) -- cgit v1.2.3 From 33e1fc062456f43f17e5240d6e9be11e95ef5103 Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Wed, 9 Jun 2021 21:24:10 +0000 Subject: drm/connector: add ref to drm_connector_get in iter docs Mention that connectors need to be referenced manually if they are to be accessed after the iteration has progressed or ended. Signed-off-by: Simon Ser Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/KRoUI7OC9lRIvk3YzdGm6tcMVAVlG1fR78Ll7kTZZT4@cp3-web-051.plabs.ch --- include/drm/drm_connector.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/drm') diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 0a1d9a0fcbb2..1647960c9e50 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1740,6 +1740,11 @@ void drm_mode_put_tile_group(struct drm_device *dev, * drm_connector_list_iter_begin(), drm_connector_list_iter_end() and * drm_connector_list_iter_next() respectively the convenience macro * drm_for_each_connector_iter(). + * + * Note that the return value of drm_connector_list_iter_next() is only valid + * up to the next drm_connector_list_iter_next() or + * drm_connector_list_iter_end() call. If you want to use the connector later, + * then you need to grab your own reference first using drm_connector_get(). */ struct drm_connector_list_iter { /* private: */ -- cgit v1.2.3 From 279cc2e9543eb357c0ef299cf398b2e74a021f6b Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 30 Jul 2021 20:35:07 +0200 Subject: drm: Define DRM_FORMAT_MAX_PLANES DRM uses a magic number of 4 for the maximum number of planes per color format. Declare this constant via DRM_FORMAT_MAX_PLANES and update the related code. Some code depends on the length of arrays that are now declared with DRM_FORMAT_MAX_PLANES. Convert it from '4' to ARRAY_SIZE. v2: * mention usage of ARRAY_SIZE() in the commit message (Maxime) * also fix error handling in drm_gem_fb_init_with_funcs() (kernel test robot) * include for DRM_FORMAT_MAX_PLANES Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-2-tzimmermann@suse.de --- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 19 +++++++++++-------- include/drm/drm_fourcc.h | 13 +++++++++---- include/drm/drm_framebuffer.h | 8 ++++---- include/drm/drm_gem_atomic_helper.h | 3 ++- 4 files changed, 26 insertions(+), 17 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 67bc9edc1d98..421e029a6b3e 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -48,7 +48,7 @@ struct drm_gem_object *drm_gem_fb_get_obj(struct drm_framebuffer *fb, unsigned int plane) { - if (plane >= 4) + if (plane >= ARRAY_SIZE(fb->obj)) return NULL; return fb->obj[plane]; @@ -62,7 +62,8 @@ drm_gem_fb_init(struct drm_device *dev, struct drm_gem_object **obj, unsigned int num_planes, const struct drm_framebuffer_funcs *funcs) { - int ret, i; + unsigned int i; + int ret; drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); @@ -86,9 +87,9 @@ drm_gem_fb_init(struct drm_device *dev, */ void drm_gem_fb_destroy(struct drm_framebuffer *fb) { - int i; + size_t i; - for (i = 0; i < 4; i++) + for (i = 0; i < ARRAY_SIZE(fb->obj); i++) drm_gem_object_put(fb->obj[i]); drm_framebuffer_cleanup(fb); @@ -145,8 +146,9 @@ int drm_gem_fb_init_with_funcs(struct drm_device *dev, const struct drm_framebuffer_funcs *funcs) { const struct drm_format_info *info; - struct drm_gem_object *objs[4]; - int ret, i; + struct drm_gem_object *objs[DRM_FORMAT_MAX_PLANES]; + unsigned int i; + int ret; info = drm_get_format_info(dev, mode_cmd); if (!info) { @@ -187,9 +189,10 @@ int drm_gem_fb_init_with_funcs(struct drm_device *dev, return 0; err_gem_object_put: - for (i--; i >= 0; i--) + while (i > 0) { + --i; drm_gem_object_put(objs[i]); - + } return ret; } EXPORT_SYMBOL_GPL(drm_gem_fb_init_with_funcs); diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 3b138d4ae67e..22aa64d07c79 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -25,6 +25,11 @@ #include #include +/** + * DRM_FORMAT_MAX_PLANES - maximum number of planes a DRM format can have + */ +#define DRM_FORMAT_MAX_PLANES 4u + /* * DRM formats are little endian. Define host endian variants for the * most common formats here, to reduce the #ifdefs needed in drivers. @@ -78,7 +83,7 @@ struct drm_format_info { * triplet @char_per_block, @block_w, @block_h for better * describing the pixel format. */ - u8 cpp[4]; + u8 cpp[DRM_FORMAT_MAX_PLANES]; /** * @char_per_block: @@ -104,7 +109,7 @@ struct drm_format_info { * information from their drm_mode_config.get_format_info hook * if they want the core to be validating the pitch. */ - u8 char_per_block[4]; + u8 char_per_block[DRM_FORMAT_MAX_PLANES]; }; /** @@ -113,7 +118,7 @@ struct drm_format_info { * Block width in pixels, this is intended to be accessed through * drm_format_info_block_width() */ - u8 block_w[4]; + u8 block_w[DRM_FORMAT_MAX_PLANES]; /** * @block_h: @@ -121,7 +126,7 @@ struct drm_format_info { * Block height in pixels, this is intended to be accessed through * drm_format_info_block_height() */ - u8 block_h[4]; + u8 block_h[DRM_FORMAT_MAX_PLANES]; /** @hsub: Horizontal chroma subsampling factor */ u8 hsub; diff --git a/include/drm/drm_framebuffer.h b/include/drm/drm_framebuffer.h index be658ebbec72..f67c5b7bcb68 100644 --- a/include/drm/drm_framebuffer.h +++ b/include/drm/drm_framebuffer.h @@ -27,12 +27,12 @@ #include #include +#include #include struct drm_clip_rect; struct drm_device; struct drm_file; -struct drm_format_info; struct drm_framebuffer; struct drm_gem_object; @@ -147,7 +147,7 @@ struct drm_framebuffer { * @pitches: Line stride per buffer. For userspace created object this * is copied from drm_mode_fb_cmd2. */ - unsigned int pitches[4]; + unsigned int pitches[DRM_FORMAT_MAX_PLANES]; /** * @offsets: Offset from buffer start to the actual pixel data in bytes, * per buffer. For userspace created object this is copied from @@ -165,7 +165,7 @@ struct drm_framebuffer { * data (even for linear buffers). Specifying an x/y pixel offset is * instead done through the source rectangle in &struct drm_plane_state. */ - unsigned int offsets[4]; + unsigned int offsets[DRM_FORMAT_MAX_PLANES]; /** * @modifier: Data layout modifier. This is used to describe * tiling, or also special layouts (like compression) of auxiliary @@ -210,7 +210,7 @@ struct drm_framebuffer { * This is used by the GEM framebuffer helpers, see e.g. * drm_gem_fb_create(). */ - struct drm_gem_object *obj[4]; + struct drm_gem_object *obj[DRM_FORMAT_MAX_PLANES]; }; #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base) diff --git a/include/drm/drm_gem_atomic_helper.h b/include/drm/drm_gem_atomic_helper.h index d82c23622156..f9f8b6f0494a 100644 --- a/include/drm/drm_gem_atomic_helper.h +++ b/include/drm/drm_gem_atomic_helper.h @@ -5,6 +5,7 @@ #include +#include #include struct drm_simple_display_pipe; @@ -40,7 +41,7 @@ struct drm_shadow_plane_state { * The memory mappings stored in map should be established in the plane's * prepare_fb callback and removed in the cleanup_fb callback. */ - struct dma_buf_map map[4]; + struct dma_buf_map map[DRM_FORMAT_MAX_PLANES]; }; /** -- cgit v1.2.3 From f6424ecdb3c8aba18997a6992f780ab9c27734bc Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 30 Jul 2021 20:35:08 +0200 Subject: drm/gem: Provide drm_gem_fb_{vmap,vunmap}() Move framebuffer vmap code from shadow-buffered plane state into the new interfaces drm_gem_fb_vmap() and drm_gem_fb_vunmap(). These functions provide mappings of a framebuffer's BOs into kernel address space. No functional changes. v4: * remove duplicated blank line v2: * using [static N] for array parameters enables compile-time checks * include for DRM_FORMAT_MAX_PLANES (kernel test robot) Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-3-tzimmermann@suse.de --- drivers/gpu/drm/drm_gem_atomic_helper.c | 35 +------------- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 72 ++++++++++++++++++++++++++++ include/drm/drm_gem_framebuffer_helper.h | 6 +++ 3 files changed, 80 insertions(+), 33 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c index 86b3c676e0b1..4865870cc60e 100644 --- a/drivers/gpu/drm/drm_gem_atomic_helper.c +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c @@ -330,10 +330,7 @@ int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *p { struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); struct drm_framebuffer *fb = plane_state->fb; - struct drm_gem_object *obj; - struct dma_buf_map map; int ret; - size_t i; if (!fb) return 0; @@ -342,27 +339,7 @@ int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *p if (ret) return ret; - for (i = 0; i < ARRAY_SIZE(shadow_plane_state->map); ++i) { - obj = drm_gem_fb_get_obj(fb, i); - if (!obj) - continue; - ret = drm_gem_vmap(obj, &map); - if (ret) - goto err_drm_gem_vunmap; - shadow_plane_state->map[i] = map; - } - - return 0; - -err_drm_gem_vunmap: - while (i) { - --i; - obj = drm_gem_fb_get_obj(fb, i); - if (!obj) - continue; - drm_gem_vunmap(obj, &shadow_plane_state->map[i]); - } - return ret; + return drm_gem_fb_vmap(fb, shadow_plane_state->map); } EXPORT_SYMBOL(drm_gem_prepare_shadow_fb); @@ -380,19 +357,11 @@ void drm_gem_cleanup_shadow_fb(struct drm_plane *plane, struct drm_plane_state * { struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); struct drm_framebuffer *fb = plane_state->fb; - size_t i = ARRAY_SIZE(shadow_plane_state->map); - struct drm_gem_object *obj; if (!fb) return; - while (i) { - --i; - obj = drm_gem_fb_get_obj(fb, i); - if (!obj) - continue; - drm_gem_vunmap(obj, &shadow_plane_state->map[i]); - } + drm_gem_fb_vunmap(fb, shadow_plane_state->map); } EXPORT_SYMBOL(drm_gem_cleanup_shadow_fb); diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 421e029a6b3e..2bc0605c8bca 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -15,6 +15,8 @@ #include #include +#include "drm_internal.h" + #define AFBC_HEADER_SIZE 16 #define AFBC_TH_LAYOUT_ALIGNMENT 8 #define AFBC_HDR_ALIGN 64 @@ -309,6 +311,76 @@ drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, } EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty); +/** + * drm_gem_fb_vmap - maps all framebuffer BOs into kernel address space + * @fb: the framebuffer + * @map: returns the mapping's address for each BO + * + * This function maps all buffer objects of the given framebuffer into + * kernel address space and stores them in struct dma_buf_map. If the + * mapping operation fails for one of the BOs, the function unmaps the + * already established mappings automatically. + * + * See drm_gem_fb_vunmap() for unmapping. + * + * Returns: + * 0 on success, or a negative errno code otherwise. + */ +int drm_gem_fb_vmap(struct drm_framebuffer *fb, + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]) +{ + struct drm_gem_object *obj; + unsigned int i; + int ret; + + for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) { + obj = drm_gem_fb_get_obj(fb, i); + if (!obj) + continue; + ret = drm_gem_vmap(obj, &map[i]); + if (ret) + goto err_drm_gem_vunmap; + } + + return 0; + +err_drm_gem_vunmap: + while (i) { + --i; + obj = drm_gem_fb_get_obj(fb, i); + if (!obj) + continue; + drm_gem_vunmap(obj, &map[i]); + } + return ret; +} +EXPORT_SYMBOL(drm_gem_fb_vmap); + +/** + * drm_gem_fb_vunmap - unmaps framebuffer BOs from kernel address space + * @fb: the framebuffer + * @map: mapping addresses as returned by drm_gem_fb_vmap() + * + * This function unmaps all buffer objects of the given framebuffer. + * + * See drm_gem_fb_vmap() for more information. + */ +void drm_gem_fb_vunmap(struct drm_framebuffer *fb, + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]) +{ + unsigned int i = DRM_FORMAT_MAX_PLANES; + struct drm_gem_object *obj; + + while (i) { + --i; + obj = drm_gem_fb_get_obj(fb, i); + if (!obj) + continue; + drm_gem_vunmap(obj, &map[i]); + } +} +EXPORT_SYMBOL(drm_gem_fb_vunmap); + /** * drm_gem_fb_begin_cpu_access - prepares GEM buffer objects for CPU access * @fb: the framebuffer diff --git a/include/drm/drm_gem_framebuffer_helper.h b/include/drm/drm_gem_framebuffer_helper.h index 5705722f0855..ff2024dd7b77 100644 --- a/include/drm/drm_gem_framebuffer_helper.h +++ b/include/drm/drm_gem_framebuffer_helper.h @@ -4,6 +4,8 @@ #include #include +#include + struct drm_afbc_framebuffer; struct drm_device; struct drm_fb_helper_surface_size; @@ -37,6 +39,10 @@ struct drm_framebuffer * drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd); +int drm_gem_fb_vmap(struct drm_framebuffer *fb, + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]); +void drm_gem_fb_vunmap(struct drm_framebuffer *fb, + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]); int drm_gem_fb_begin_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir); void drm_gem_fb_end_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir); -- cgit v1.2.3 From 649839d7cf978f08377ba6486c46683d09a3e05d Mon Sep 17 00:00:00 2001 From: Desmond Cheong Zhi Xi Date: Mon, 2 Aug 2021 18:59:57 +0800 Subject: drm: add lockdep assert to drm_is_current_master_locked In drm_is_current_master_locked, accessing drm_file.master should be protected by either drm_file.master_lookup_lock or drm_device.master_mutex. This was previously awkward to assert with lockdep. Following patch ("locking/lockdep: Provide lockdep_assert{,_once}() helpers"), this assertion is now convenient. So we add in the assertion and explain this lock design in the kerneldoc. Signed-off-by: Desmond Cheong Zhi Xi Acked-by: Boqun Feng Acked-by: Waiman Long Acked-by: Peter Zijlstra (Intel) Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210802105957.77692-3-desmondcheongzx@gmail.com --- drivers/gpu/drm/drm_auth.c | 6 +++--- include/drm/drm_file.h | 4 ++++ 2 files changed, 7 insertions(+), 3 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c index 53e58bbb6cf5..60a6b21474b1 100644 --- a/drivers/gpu/drm/drm_auth.c +++ b/drivers/gpu/drm/drm_auth.c @@ -63,9 +63,9 @@ static bool drm_is_current_master_locked(struct drm_file *fpriv) { - /* Either drm_device.master_mutex or drm_file.master_lookup_lock - * should be held here. - */ + lockdep_assert_once(lockdep_is_held(&fpriv->master_lookup_lock) || + lockdep_is_held(&fpriv->minor->dev->master_mutex)); + return fpriv->is_master && drm_lease_owner(fpriv->master) == fpriv->minor->dev->master; } diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index 726cfe0ff5f5..a3acb7ac3550 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -233,6 +233,10 @@ struct drm_file { * this only matches &drm_device.master if the master is the currently * active one. * + * To update @master, both &drm_device.master_mutex and + * @master_lookup_lock need to be held, therefore holding either of + * them is safe and enough for the read side. + * * When dereferencing this pointer, either hold struct * &drm_device.master_mutex for the duration of the pointer's use, or * use drm_file_get_master() if struct &drm_device.master_mutex is not -- cgit v1.2.3 From 38c5af44a75ac1c76da8f8eec578670ff65471c0 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Wed, 14 Jul 2021 16:22:38 +0200 Subject: drm/simple-kms: Support custom CRTC state Simple KMS helpers already support custom state for planes. Extend the helpers to support custom CRTC state as well. Drivers can set the reset, duplicate and destroy callbacks for the display pipeline's CRTC state and inherit from struct drm_crtc_state by embedding an instance. Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-12-tzimmermann@suse.de --- drivers/gpu/drm/drm_simple_kms_helper.c | 39 ++++++++++++++++++++++++++++++--- include/drm/drm_simple_kms_helper.h | 27 +++++++++++++++++++++++ 2 files changed, 63 insertions(+), 3 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c index 735f4f34bcc4..72989ed1baba 100644 --- a/drivers/gpu/drm/drm_simple_kms_helper.c +++ b/drivers/gpu/drm/drm_simple_kms_helper.c @@ -145,6 +145,39 @@ static const struct drm_crtc_helper_funcs drm_simple_kms_crtc_helper_funcs = { .atomic_disable = drm_simple_kms_crtc_disable, }; +static void drm_simple_kms_crtc_reset(struct drm_crtc *crtc) +{ + struct drm_simple_display_pipe *pipe; + + pipe = container_of(crtc, struct drm_simple_display_pipe, crtc); + if (!pipe->funcs || !pipe->funcs->reset_crtc) + return drm_atomic_helper_crtc_reset(crtc); + + return pipe->funcs->reset_crtc(pipe); +} + +static struct drm_crtc_state *drm_simple_kms_crtc_duplicate_state(struct drm_crtc *crtc) +{ + struct drm_simple_display_pipe *pipe; + + pipe = container_of(crtc, struct drm_simple_display_pipe, crtc); + if (!pipe->funcs || !pipe->funcs->duplicate_crtc_state) + return drm_atomic_helper_crtc_duplicate_state(crtc); + + return pipe->funcs->duplicate_crtc_state(pipe); +} + +static void drm_simple_kms_crtc_destroy_state(struct drm_crtc *crtc, struct drm_crtc_state *state) +{ + struct drm_simple_display_pipe *pipe; + + pipe = container_of(crtc, struct drm_simple_display_pipe, crtc); + if (!pipe->funcs || !pipe->funcs->destroy_crtc_state) + drm_atomic_helper_crtc_destroy_state(crtc, state); + else + pipe->funcs->destroy_crtc_state(pipe, state); +} + static int drm_simple_kms_crtc_enable_vblank(struct drm_crtc *crtc) { struct drm_simple_display_pipe *pipe; @@ -168,12 +201,12 @@ static void drm_simple_kms_crtc_disable_vblank(struct drm_crtc *crtc) } static const struct drm_crtc_funcs drm_simple_kms_crtc_funcs = { - .reset = drm_atomic_helper_crtc_reset, + .reset = drm_simple_kms_crtc_reset, .destroy = drm_crtc_cleanup, .set_config = drm_atomic_helper_set_config, .page_flip = drm_atomic_helper_page_flip, - .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .atomic_duplicate_state = drm_simple_kms_crtc_duplicate_state, + .atomic_destroy_state = drm_simple_kms_crtc_destroy_state, .enable_vblank = drm_simple_kms_crtc_enable_vblank, .disable_vblank = drm_simple_kms_crtc_disable_vblank, }; diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h index cf07132d4ee8..0b3647e614dd 100644 --- a/include/drm/drm_simple_kms_helper.h +++ b/include/drm/drm_simple_kms_helper.h @@ -153,6 +153,33 @@ struct drm_simple_display_pipe_funcs { */ void (*disable_vblank)(struct drm_simple_display_pipe *pipe); + /** + * @reset_crtc: + * + * Optional, called by &drm_crtc_funcs.reset. Please read the + * documentation for the &drm_crtc_funcs.reset hook for more details. + */ + void (*reset_crtc)(struct drm_simple_display_pipe *pipe); + + /** + * @duplicate_crtc_state: + * + * Optional, called by &drm_crtc_funcs.atomic_duplicate_state. Please + * read the documentation for the &drm_crtc_funcs.atomic_duplicate_state + * hook for more details. + */ + struct drm_crtc_state * (*duplicate_crtc_state)(struct drm_simple_display_pipe *pipe); + + /** + * @destroy_crtc_state: + * + * Optional, called by &drm_crtc_funcs.atomic_destroy_state. Please + * read the documentation for the &drm_crtc_funcs.atomic_destroy_state + * hook for more details. + */ + void (*destroy_crtc_state)(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state); + /** * @reset_plane: * -- cgit v1.2.3 From 43b36232ded23ce943224df3d1451f981446ae23 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Tue, 3 Aug 2021 14:59:18 +0200 Subject: drm/gem: Provide offset-adjusted framebuffer BO mappings Add an additional argument to drm_gem_fb_vmap() to return each BO's mapping adjusted by the respective offset. Update all callers. The newly returned values point to the first byite of the data stored in the framebuffer BOs. Drivers that access the BO data should use it. Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-2-tzimmermann@suse.de --- drivers/gpu/drm/drm_gem_atomic_helper.c | 2 +- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 17 ++++++++++++++++- drivers/gpu/drm/gud/gud_pipe.c | 2 +- drivers/gpu/drm/vkms/vkms_writeback.c | 2 +- include/drm/drm_gem_atomic_helper.h | 8 ++++++++ include/drm/drm_gem_framebuffer_helper.h | 3 ++- 6 files changed, 29 insertions(+), 5 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c index 4865870cc60e..e570398abd78 100644 --- a/drivers/gpu/drm/drm_gem_atomic_helper.c +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c @@ -339,7 +339,7 @@ int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *p if (ret) return ret; - return drm_gem_fb_vmap(fb, shadow_plane_state->map); + return drm_gem_fb_vmap(fb, shadow_plane_state->map, shadow_plane_state->data); } EXPORT_SYMBOL(drm_gem_prepare_shadow_fb); diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 5731a6a1dfa5..3c75d79dbb65 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -315,19 +315,25 @@ EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty); * drm_gem_fb_vmap - maps all framebuffer BOs into kernel address space * @fb: the framebuffer * @map: returns the mapping's address for each BO + * @data: returns the data address for each BO, can be NULL * * This function maps all buffer objects of the given framebuffer into * kernel address space and stores them in struct dma_buf_map. If the * mapping operation fails for one of the BOs, the function unmaps the * already established mappings automatically. * + * Callers that want to access a BO's stored data should pass @data. + * The argument returns the addresses of the data stored in each BO. This + * is different from @map if the framebuffer's offsets field is non-zero. + * * See drm_gem_fb_vunmap() for unmapping. * * Returns: * 0 on success, or a negative errno code otherwise. */ int drm_gem_fb_vmap(struct drm_framebuffer *fb, - struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]) + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES], + struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]) { struct drm_gem_object *obj; unsigned int i; @@ -344,6 +350,15 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, goto err_drm_gem_vunmap; } + if (data) { + for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) { + memcpy(&data[i], &map[i], sizeof(data[i])); + if (dma_buf_map_is_null(&data[i])) + continue; + dma_buf_map_incr(&data[i], fb->offsets[i]); + } + } + return 0; err_drm_gem_vunmap: diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c index 7e009f562b30..6270a1a32a65 100644 --- a/drivers/gpu/drm/gud/gud_pipe.c +++ b/drivers/gpu/drm/gud/gud_pipe.c @@ -162,7 +162,7 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb, if (len > gdrm->bulk_len) return -E2BIG; - ret = drm_gem_fb_vmap(fb, map); + ret = drm_gem_fb_vmap(fb, map, NULL); if (ret) return ret; diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c index 425b6c6b8cad..3a8e2ed93e7c 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -75,7 +75,7 @@ static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector, if (!vkmsjob) return -ENOMEM; - ret = drm_gem_fb_vmap(job->fb, vkmsjob->map); + ret = drm_gem_fb_vmap(job->fb, vkmsjob->map, NULL); if (ret) { DRM_ERROR("vmap failed: %d\n", ret); goto err_kfree; diff --git a/include/drm/drm_gem_atomic_helper.h b/include/drm/drm_gem_atomic_helper.h index f9f8b6f0494a..48222a107873 100644 --- a/include/drm/drm_gem_atomic_helper.h +++ b/include/drm/drm_gem_atomic_helper.h @@ -42,6 +42,14 @@ struct drm_shadow_plane_state { * prepare_fb callback and removed in the cleanup_fb callback. */ struct dma_buf_map map[DRM_FORMAT_MAX_PLANES]; + + /** + * @data: Address of each framebuffer BO's data + * + * The address of the data stored in each mapping. This is different + * for framebuffers with non-zero offset fields. + */ + struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]; }; /** diff --git a/include/drm/drm_gem_framebuffer_helper.h b/include/drm/drm_gem_framebuffer_helper.h index ff2024dd7b77..905727719ead 100644 --- a/include/drm/drm_gem_framebuffer_helper.h +++ b/include/drm/drm_gem_framebuffer_helper.h @@ -40,7 +40,8 @@ drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd); int drm_gem_fb_vmap(struct drm_framebuffer *fb, - struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]); + struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES], + struct dma_buf_map data[DRM_FORMAT_MAX_PLANES]); void drm_gem_fb_vunmap(struct drm_framebuffer *fb, struct dma_buf_map map[static DRM_FORMAT_MAX_PLANES]); int drm_gem_fb_begin_cpu_access(struct drm_framebuffer *fb, enum dma_data_direction dir); -- cgit v1.2.3 From 0b05dd6b453da1479f635c4e96a962837c8a389b Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Tue, 3 Aug 2021 11:07:03 +0200 Subject: drm: Remove unused devm_drm_irq_install() DRM IRQ helpers will become legacy. The function devm_drm_irq_install() is unused and won't be required later. Signed-off-by: Thomas Zimmermann Acked-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-14-tzimmermann@suse.de --- drivers/gpu/drm/drm_irq.c | 32 -------------------------------- include/drm/drm_irq.h | 1 - 2 files changed, 33 deletions(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 4a853011549a..4a13d2fc5252 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -209,38 +209,6 @@ int drm_irq_uninstall(struct drm_device *dev) } EXPORT_SYMBOL(drm_irq_uninstall); -static void devm_drm_irq_uninstall(void *data) -{ - drm_irq_uninstall(data); -} - -/** - * devm_drm_irq_install - install IRQ handler - * @dev: DRM device - * @irq: IRQ number to install the handler for - * - * devm_drm_irq_install is a help function of drm_irq_install. - * - * if the driver uses devm_drm_irq_install, there is no need - * to call drm_irq_uninstall when the drm module get unloaded, - * as this will done automagically. - * - * Returns: - * Zero on success or a negative error code on failure. - */ -int devm_drm_irq_install(struct drm_device *dev, int irq) -{ - int ret; - - ret = drm_irq_install(dev, irq); - if (ret) - return ret; - - return devm_add_action_or_reset(dev->dev, - devm_drm_irq_uninstall, dev); -} -EXPORT_SYMBOL(devm_drm_irq_install); - #if IS_ENABLED(CONFIG_DRM_LEGACY) int drm_legacy_irq_control(struct drm_device *dev, void *data, struct drm_file *file_priv) diff --git a/include/drm/drm_irq.h b/include/drm/drm_irq.h index 631b22f9757d..53634b988f57 100644 --- a/include/drm/drm_irq.h +++ b/include/drm/drm_irq.h @@ -28,5 +28,4 @@ struct drm_device; int drm_irq_install(struct drm_device *dev, int irq); int drm_irq_uninstall(struct drm_device *dev); -int devm_drm_irq_install(struct drm_device *dev, int irq); #endif -- cgit v1.2.3 From c1736b9008cb06a95231410145d0b9d2709ec86f Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 25 Jun 2021 15:50:33 +0200 Subject: drm: IRQ midlayer is now legacy Hide the DRM midlayer behind CONFIG_DRM_LEGACY, make functions use the prefix drm_legacy_, and move declarations to drm_legacy.h. In struct drm_device, move the fields irq and irq_enabled behind CONFIG_DRM_LEGACY. All callers have been updated. Signed-off-by: Thomas Zimmermann Acked-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-15-tzimmermann@suse.de --- drivers/gpu/drm/drm_irq.c | 63 +++++---------------------------------- drivers/gpu/drm/drm_legacy_misc.c | 3 +- drivers/gpu/drm/drm_vblank.c | 8 ++--- drivers/gpu/drm/i810/i810_dma.c | 3 +- drivers/gpu/drm/mga/mga_dma.c | 2 +- drivers/gpu/drm/mga/mga_drv.h | 1 - drivers/gpu/drm/r128/r128_cce.c | 3 +- drivers/gpu/drm/via/via_mm.c | 3 +- include/drm/drm_device.h | 18 +++-------- include/drm/drm_drv.h | 44 +++------------------------ include/drm/drm_irq.h | 31 ------------------- include/drm/drm_legacy.h | 3 ++ 12 files changed, 27 insertions(+), 155 deletions(-) delete mode 100644 include/drm/drm_irq.h (limited to 'include/drm') diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 4a13d2fc5252..13e1d5c4ec82 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -60,46 +60,14 @@ #include #include #include -#include +#include #include #include #include "drm_internal.h" -/** - * DOC: irq helpers - * - * The DRM core provides very simple support helpers to enable IRQ handling on a - * device through the drm_irq_install() and drm_irq_uninstall() functions. This - * only supports devices with a single interrupt on the main device stored in - * &drm_device.dev and set as the device parameter in drm_dev_alloc(). - * - * These IRQ helpers are strictly optional. Since these helpers don't automatically - * clean up the requested interrupt like e.g. devm_request_irq() they're not really - * recommended. - */ - -/** - * drm_irq_install - install IRQ handler - * @dev: DRM device - * @irq: IRQ number to install the handler for - * - * Initializes the IRQ related data. Installs the handler, calling the driver - * &drm_driver.irq_preinstall and &drm_driver.irq_postinstall functions before - * and after the installation. - * - * This is the simplified helper interface provided for drivers with no special - * needs. - * - * @irq must match the interrupt number that would be passed to request_irq(), - * if called directly instead of using this helper function. - * - * &drm_driver.irq_handler is called to handle the registered interrupt. - * - * Returns: - * Zero on success or a negative error code on failure. - */ -int drm_irq_install(struct drm_device *dev, int irq) +#if IS_ENABLED(CONFIG_DRM_LEGACY) +static int drm_legacy_irq_install(struct drm_device *dev, int irq) { int ret; unsigned long sh_flags = 0; @@ -144,24 +112,8 @@ int drm_irq_install(struct drm_device *dev, int irq) return ret; } -EXPORT_SYMBOL(drm_irq_install); -/** - * drm_irq_uninstall - uninstall the IRQ handler - * @dev: DRM device - * - * Calls the driver's &drm_driver.irq_uninstall function and unregisters the IRQ - * handler. This should only be called by drivers which used drm_irq_install() - * to set up their interrupt handler. - * - * Note that for kernel modesetting drivers it is a bug if this function fails. - * The sanity checks are only to catch buggy user modesetting drivers which call - * the same function through an ioctl. - * - * Returns: - * Zero on success or a negative error code on failure. - */ -int drm_irq_uninstall(struct drm_device *dev) +int drm_legacy_irq_uninstall(struct drm_device *dev) { unsigned long irqflags; bool irq_enabled; @@ -207,9 +159,8 @@ int drm_irq_uninstall(struct drm_device *dev) return 0; } -EXPORT_SYMBOL(drm_irq_uninstall); +EXPORT_SYMBOL(drm_legacy_irq_uninstall); -#if IS_ENABLED(CONFIG_DRM_LEGACY) int drm_legacy_irq_control(struct drm_device *dev, void *data, struct drm_file *file_priv) { @@ -238,13 +189,13 @@ int drm_legacy_irq_control(struct drm_device *dev, void *data, ctl->irq != irq) return -EINVAL; mutex_lock(&dev->struct_mutex); - ret = drm_irq_install(dev, irq); + ret = drm_legacy_irq_install(dev, irq); mutex_unlock(&dev->struct_mutex); return ret; case DRM_UNINST_HANDLER: mutex_lock(&dev->struct_mutex); - ret = drm_irq_uninstall(dev); + ret = drm_legacy_irq_uninstall(dev); mutex_unlock(&dev->struct_mutex); return ret; diff --git a/drivers/gpu/drm/drm_legacy_misc.c b/drivers/gpu/drm/drm_legacy_misc.c index 83db43b7a25e..d4c5434062d7 100644 --- a/drivers/gpu/drm/drm_legacy_misc.c +++ b/drivers/gpu/drm/drm_legacy_misc.c @@ -35,7 +35,6 @@ #include #include -#include #include #include "drm_internal.h" @@ -78,7 +77,7 @@ int drm_legacy_setup(struct drm_device * dev) void drm_legacy_dev_reinit(struct drm_device *dev) { if (dev->irq_enabled) - drm_irq_uninstall(dev); + drm_legacy_irq_uninstall(dev); mutex_lock(&dev->struct_mutex); diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 977b6509bb4b..b701cda86d0c 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -1739,10 +1739,10 @@ static void drm_wait_vblank_reply(struct drm_device *dev, unsigned int pipe, static bool drm_wait_vblank_supported(struct drm_device *dev) { - if (IS_ENABLED(CONFIG_DRM_LEGACY)) { - if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY))) - return dev->irq_enabled; - } +#if IS_ENABLED(CONFIG_DRM_LEGACY) + if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY))) + return dev->irq_enabled; +#endif return drm_dev_has_vblank(dev); } diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c index d78c82af367c..9fb4dd63342f 100644 --- a/drivers/gpu/drm/i810/i810_dma.c +++ b/drivers/gpu/drm/i810/i810_dma.c @@ -38,7 +38,6 @@ #include #include #include -#include #include #include @@ -209,7 +208,7 @@ static int i810_dma_cleanup(struct drm_device *dev) * is freed, it's too late. */ if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled) - drm_irq_uninstall(dev); + drm_legacy_irq_uninstall(dev); if (dev->dev_private) { int i; diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c index 403efc1f1a7c..331c2f0da57a 100644 --- a/drivers/gpu/drm/mga/mga_dma.c +++ b/drivers/gpu/drm/mga/mga_dma.c @@ -949,7 +949,7 @@ static int mga_do_cleanup_dma(struct drm_device *dev, int full_cleanup) * is freed, it's too late. */ if (dev->irq_enabled) - drm_irq_uninstall(dev); + drm_legacy_irq_uninstall(dev); if (dev->dev_private) { drm_mga_private_t *dev_priv = dev->dev_private; diff --git a/drivers/gpu/drm/mga/mga_drv.h b/drivers/gpu/drm/mga/mga_drv.h index 84395d81ab9b..f61401c70b90 100644 --- a/drivers/gpu/drm/mga/mga_drv.h +++ b/drivers/gpu/drm/mga/mga_drv.h @@ -38,7 +38,6 @@ #include #include #include -#include #include #include #include diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c index 2a2933c16308..c04d84a69dd2 100644 --- a/drivers/gpu/drm/r128/r128_cce.c +++ b/drivers/gpu/drm/r128/r128_cce.c @@ -39,7 +39,6 @@ #include #include -#include #include #include #include @@ -603,7 +602,7 @@ int r128_do_cleanup_cce(struct drm_device *dev) * is freed, it's too late. */ if (dev->irq_enabled) - drm_irq_uninstall(dev); + drm_legacy_irq_uninstall(dev); if (dev->dev_private) { drm_r128_private_t *dev_priv = dev->dev_private; diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c index dae1bacd86c1..c9afa1a51f23 100644 --- a/drivers/gpu/drm/via/via_mm.c +++ b/drivers/gpu/drm/via/via_mm.c @@ -29,7 +29,6 @@ #include #include -#include #include #include "via_drv.h" @@ -86,7 +85,7 @@ int via_final_context(struct drm_device *dev, int context) /* Last context, perform cleanup */ if (list_is_singular(&dev->ctxlist)) { DRM_DEBUG("Last Context\n"); - drm_irq_uninstall(dev); + drm_legacy_irq_uninstall(dev); via_cleanup_futex(dev_priv); via_do_cleanup_map(dev); } diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index f588f967bb14..604b1d1b2d72 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -191,20 +191,6 @@ struct drm_device { */ struct list_head clientlist; - /** - * @irq_enabled: - * - * Indicates that interrupt handling is enabled, specifically vblank - * handling. Drivers which don't use drm_irq_install() need to set this - * to true manually. - */ - bool irq_enabled; - - /** - * @irq: Used by the drm_irq_install() and drm_irq_unistall() helpers. - */ - int irq; - /** * @vblank_disable_immediate: * @@ -372,6 +358,10 @@ struct drm_device { /* Scatter gather memory */ struct drm_sg_mem *sg; + + /* IRQs */ + bool irq_enabled; + int irq; #endif }; diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index b439ae1921b8..0cd95953cdf5 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -137,10 +137,6 @@ enum drm_driver_feature { * @DRIVER_HAVE_IRQ: * * Legacy irq support. Only for legacy drivers. Do not use. - * - * New drivers can either use the drm_irq_install() and - * drm_irq_uninstall() helper functions, or roll their own irq support - * code by calling request_irq() directly. */ DRIVER_HAVE_IRQ = BIT(30), /** @@ -271,42 +267,6 @@ struct drm_driver { */ void (*release) (struct drm_device *); - /** - * @irq_handler: - * - * Interrupt handler called when using drm_irq_install(). Not used by - * drivers which implement their own interrupt handling. - */ - irqreturn_t(*irq_handler) (int irq, void *arg); - - /** - * @irq_preinstall: - * - * Optional callback used by drm_irq_install() which is called before - * the interrupt handler is registered. This should be used to clear out - * any pending interrupts (from e.g. firmware based drives) and reset - * the interrupt handling registers. - */ - void (*irq_preinstall) (struct drm_device *dev); - - /** - * @irq_postinstall: - * - * Optional callback used by drm_irq_install() which is called after - * the interrupt handler is registered. This should be used to enable - * interrupt generation in the hardware. - */ - int (*irq_postinstall) (struct drm_device *dev); - - /** - * @irq_uninstall: - * - * Optional callback used by drm_irq_uninstall() which is called before - * the interrupt handler is unregistered. This should be used to disable - * interrupt generation in the hardware. - */ - void (*irq_uninstall) (struct drm_device *dev); - /** * @master_set: * @@ -504,6 +464,10 @@ struct drm_driver { int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv); int (*dma_quiescent) (struct drm_device *); int (*context_dtor) (struct drm_device *dev, int context); + irqreturn_t (*irq_handler)(int irq, void *arg); + void (*irq_preinstall)(struct drm_device *dev); + int (*irq_postinstall)(struct drm_device *dev); + void (*irq_uninstall)(struct drm_device *dev); u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe); int (*enable_vblank)(struct drm_device *dev, unsigned int pipe); void (*disable_vblank)(struct drm_device *dev, unsigned int pipe); diff --git a/include/drm/drm_irq.h b/include/drm/drm_irq.h deleted file mode 100644 index 53634b988f57..000000000000 --- a/include/drm/drm_irq.h +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Copyright 2016 Intel Corp. - * - * 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 - * VA LINUX SYSTEMS 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. - */ - -#ifndef _DRM_IRQ_H_ -#define _DRM_IRQ_H_ - -struct drm_device; - -int drm_irq_install(struct drm_device *dev, int irq); -int drm_irq_uninstall(struct drm_device *dev); -#endif diff --git a/include/drm/drm_legacy.h b/include/drm/drm_legacy.h index b17e79e12bc2..58dc8d8cc907 100644 --- a/include/drm/drm_legacy.h +++ b/include/drm/drm_legacy.h @@ -192,6 +192,9 @@ do { \ void drm_legacy_idlelock_take(struct drm_lock_data *lock); void drm_legacy_idlelock_release(struct drm_lock_data *lock); +/* drm_irq.c */ +int drm_legacy_irq_uninstall(struct drm_device *dev); + /* drm_pci.c */ #ifdef CONFIG_PCI -- cgit v1.2.3 From 96275df87a07aa5f5f3fec8ab239af3ea5fdf325 Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Wed, 11 Aug 2021 13:58:18 -0700 Subject: drm/edid: fix edid field name Byte 26 in a edid struct is supposed to be "Blue and white least-significant 2 bits", not "black and white". Rename the field accordingly. This field is not used anywhere, so just renaming it here for correctness. Signed-off-by: Lucas De Marchi Reviewed-by: Simon Ser Signed-off-by: Simon Ser Link: https://patchwork.freedesktop.org/patch/msgid/20210811205818.156100-1-lucas.demarchi@intel.com --- include/drm/drm_edid.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/drm') diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 759328a5eeb2..deccfd39e6db 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -336,7 +336,7 @@ struct edid { u8 features; /* Color characteristics */ u8 red_green_lo; - u8 black_white_lo; + u8 blue_white_lo; u8 red_x; u8 red_y; u8 green_x; -- cgit v1.2.3 From bd4dadaf04ceafe02f0f397a31f18a5018418e9b Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Thu, 12 Aug 2021 15:34:42 -0500 Subject: drm/ttm: ttm_bo_device is now ttm_device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit These names were changed in commit 8af8a109b34fa88b8b91f25d11485b37d37549c3 Author: Christian König Date: Thu Oct 1 14:51:40 2020 +0200 drm/ttm: device naming cleanup But he missed a couple of them. Signed-off-by: Jason Ekstrand Cc: Christian König Fixes: 8af8a109b34f ("drm/ttm: device naming cleanup") Link: https://patchwork.freedesktop.org/patch/msgid/20210812203443.1725307-1-jason@jlekstrand.net Reviewed-by: Christian König Signed-off-by: Christian König --- Documentation/gpu/drm-mm.rst | 2 +- include/drm/ttm/ttm_tt.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'include/drm') diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst index d5a73fa2c9ef..8126beadc7df 100644 --- a/Documentation/gpu/drm-mm.rst +++ b/Documentation/gpu/drm-mm.rst @@ -37,7 +37,7 @@ TTM initialization This section is outdated. Drivers wishing to support TTM must pass a filled :c:type:`ttm_bo_driver -` structure to ttm_bo_device_init, together with an +` structure to ttm_device_init, together with an initialized global reference to the memory manager. The ttm_bo_driver structure contains several fields with function pointers for initializing the TTM, allocating and freeing memory, waiting for command diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h index 818680c6a8ed..0d97967bf955 100644 --- a/include/drm/ttm/ttm_tt.h +++ b/include/drm/ttm/ttm_tt.h @@ -31,7 +31,7 @@ #include #include -struct ttm_bo_device; +struct ttm_device; struct ttm_tt; struct ttm_resource; struct ttm_buffer_object; -- cgit v1.2.3 From 80cbd8808f85017b8aff4b223db68926b470be12 Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Thu, 12 Aug 2021 15:34:43 -0500 Subject: drm/ttm: Include pagemap.h from ttm_tt.h MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It's needed for pgprot_t which is used in the header. Signed-off-by: Jason Ekstrand Cc: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20210812203443.1725307-2-jason@jlekstrand.net Reviewed-by: Christian König Signed-off-by: Christian König --- drivers/gpu/drm/ttm/ttm_tt.c | 1 - include/drm/ttm/ttm_tt.h | 1 + 2 files changed, 1 insertion(+), 1 deletion(-) (limited to 'include/drm') diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index 24031a8acd2d..d5cd8b5dc0bf 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -32,7 +32,6 @@ #define pr_fmt(fmt) "[TTM] " fmt #include -#include #include #include #include diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h index 0d97967bf955..b20e89d321b0 100644 --- a/include/drm/ttm/ttm_tt.h +++ b/include/drm/ttm/ttm_tt.h @@ -27,6 +27,7 @@ #ifndef _TTM_TT_H_ #define _TTM_TT_H_ +#include #include #include #include -- cgit v1.2.3