1 files changed, 397 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 8bce64cdc320..d4d1c39a0e99 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -18,21 +18,413 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: Rafał Miłecki <zajec5@gmail.com>
+ *          Alex Deucher <alexdeucher@gmail.com>
  */
 #include "drmP.h"
 #include "radeon.h"
+#include "avivod.h"
 
-int radeon_debugfs_pm_init(struct radeon_device *rdev);
+#define RADEON_IDLE_LOOP_MS 100
+#define RADEON_RECLOCK_DELAY_MS 200
+#define RADEON_WAIT_VBLANK_TIMEOUT 200
+
+static void radeon_pm_set_clocks_locked(struct radeon_device *rdev);
+static void radeon_pm_set_clocks(struct radeon_device *rdev);
+static void radeon_pm_idle_work_handler(struct work_struct *work);
+static int radeon_debugfs_pm_init(struct radeon_device *rdev);
+
+static const char *pm_state_names[4] = {
+	"PM_STATE_DISABLED",
+	"PM_STATE_MINIMUM",
+	"PM_STATE_PAUSED",
+	"PM_STATE_ACTIVE"
+};
+
+static const char *pm_state_types[5] = {
+	"Default",
+	"Powersave",
+	"Battery",
+	"Balanced",
+	"Performance",
+};
+
+static void radeon_print_power_mode_info(struct radeon_device *rdev)
+{
+	int i, j;
+	bool is_default;
+
+	DRM_INFO("%d Power State(s)\n", rdev->pm.num_power_states);
+	for (i = 0; i < rdev->pm.num_power_states; i++) {
+		if (rdev->pm.default_power_state == &rdev->pm.power_state[i])
+			is_default = true;
+		else
+			is_default = false;
+		DRM_INFO("State %d %s %s\n", i,
+			 pm_state_types[rdev->pm.power_state[i].type],
+			 is_default ? "(default)" : "");
+		if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
+			DRM_INFO("\t%d PCIE Lanes\n", rdev->pm.power_state[i].non_clock_info.pcie_lanes);
+		DRM_INFO("\t%d Clock Mode(s)\n", rdev->pm.power_state[i].num_clock_modes);
+		for (j = 0; j < rdev->pm.power_state[i].num_clock_modes; j++) {
+			if (rdev->flags & RADEON_IS_IGP)
+				DRM_INFO("\t\t%d engine: %d\n",
+					 j,
+					 rdev->pm.power_state[i].clock_info[j].sclk * 10);
+			else
+				DRM_INFO("\t\t%d engine/memory: %d/%d\n",
+					 j,
+					 rdev->pm.power_state[i].clock_info[j].sclk * 10,
+					 rdev->pm.power_state[i].clock_info[j].mclk * 10);
+		}
+	}
+}
+
+static struct radeon_power_state * radeon_pick_power_state(struct radeon_device *rdev,
+							   enum radeon_pm_state_type type)
+{
+	int i, j;
+	enum radeon_pm_state_type wanted_types[2];
+	int wanted_count;
+
+	switch (type) {
+	case POWER_STATE_TYPE_DEFAULT:
+	default:
+		return rdev->pm.default_power_state;
+	case POWER_STATE_TYPE_POWERSAVE:
+		if (rdev->flags & RADEON_IS_MOBILITY) {
+			wanted_types[0] = POWER_STATE_TYPE_POWERSAVE;
+			wanted_types[1] = POWER_STATE_TYPE_BATTERY;
+			wanted_count = 2;
+		} else {
+			wanted_types[0] = POWER_STATE_TYPE_PERFORMANCE;
+			wanted_count = 1;
+		}
+		break;
+	case POWER_STATE_TYPE_BATTERY:
+		if (rdev->flags & RADEON_IS_MOBILITY) {
+			wanted_types[0] = POWER_STATE_TYPE_BATTERY;
+			wanted_types[1] = POWER_STATE_TYPE_POWERSAVE;
+			wanted_count = 2;
+		} else {
+			wanted_types[0] = POWER_STATE_TYPE_PERFORMANCE;
+			wanted_count = 1;
+		}
+		break;
+	case POWER_STATE_TYPE_BALANCED:
+	case POWER_STATE_TYPE_PERFORMANCE:
+		wanted_types[0] = type;
+		wanted_count = 1;
+		break;
+	}
+
+	for (i = 0; i < wanted_count; i++) {
+		for (j = 0; j < rdev->pm.num_power_states; j++) {
+			if (rdev->pm.power_state[j].type == wanted_types[i])
+				return &rdev->pm.power_state[j];
+		}
+	}
+
+	return rdev->pm.default_power_state;
+}
+
+static struct radeon_pm_clock_info * radeon_pick_clock_mode(struct radeon_device *rdev,
+							    struct radeon_power_state *power_state,
+							    enum radeon_pm_clock_mode_type type)
+{
+	switch (type) {
+	case POWER_MODE_TYPE_DEFAULT:
+	default:
+		return power_state->default_clock_mode;
+	case POWER_MODE_TYPE_LOW:
+		return &power_state->clock_info[0];
+	case POWER_MODE_TYPE_MID:
+		if (power_state->num_clock_modes > 2)
+			return &power_state->clock_info[1];
+		else
+			return &power_state->clock_info[0];
+		break;
+	case POWER_MODE_TYPE_HIGH:
+		return &power_state->clock_info[power_state->num_clock_modes - 1];
+	}
+
+}
+
+static void radeon_get_power_state(struct radeon_device *rdev,
+				   enum radeon_pm_action action)
+{
+	switch (action) {
+	case PM_ACTION_MINIMUM:
+		rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_BATTERY);
+		rdev->pm.requested_clock_mode =
+			radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_LOW);
+		break;
+	case PM_ACTION_DOWNCLOCK:
+		rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_POWERSAVE);
+		rdev->pm.requested_clock_mode =
+			radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_MID);
+		break;
+	case PM_ACTION_UPCLOCK:
+		rdev->pm.requested_power_state = radeon_pick_power_state(rdev, POWER_STATE_TYPE_DEFAULT);
+		rdev->pm.requested_clock_mode =
+			radeon_pick_clock_mode(rdev, rdev->pm.requested_power_state, POWER_MODE_TYPE_HIGH);
+		break;
+	case PM_ACTION_NONE:
+	default:
+		DRM_ERROR("Requested mode for not defined action\n");
+		return;
+	}
+	DRM_INFO("Requested: e: %d m: %d p: %d\n",
+		 rdev->pm.requested_clock_mode->sclk,
+		 rdev->pm.requested_clock_mode->mclk,
+		 rdev->pm.requested_power_state->non_clock_info.pcie_lanes);
+}
+
+static void radeon_set_power_state(struct radeon_device *rdev)
+{
+	/* if *_clock_mode are the same, *_power_state are as well */
+	if (rdev->pm.requested_clock_mode == rdev->pm.current_clock_mode)
+		return;
+
+	DRM_INFO("Setting: e: %d m: %d p: %d\n",
+		 rdev->pm.requested_clock_mode->sclk,
+		 rdev->pm.requested_clock_mode->mclk,
+		 rdev->pm.requested_power_state->non_clock_info.pcie_lanes);
+	/* set pcie lanes */
+	/* set voltage */
+	/* set engine clock */
+	radeon_set_engine_clock(rdev, rdev->pm.requested_clock_mode->sclk);
+	/* set memory clock */
+
+	rdev->pm.current_power_state = rdev->pm.requested_power_state;
+	rdev->pm.current_clock_mode = rdev->pm.requested_clock_mode;
+}
 
 int radeon_pm_init(struct radeon_device *rdev)
 {
+	rdev->pm.state = PM_STATE_DISABLED;
+	rdev->pm.planned_action = PM_ACTION_NONE;
+	rdev->pm.downclocked = false;
+
+	if (rdev->bios) {
+		if (rdev->is_atom_bios)
+			radeon_atombios_get_power_modes(rdev);
+		else
+			radeon_combios_get_power_modes(rdev);
+		radeon_print_power_mode_info(rdev);
+	}
+
 	if (radeon_debugfs_pm_init(rdev)) {
 		DRM_ERROR("Failed to register debugfs file for PM!\n");
 	}
 
+	INIT_DELAYED_WORK(&rdev->pm.idle_work, radeon_pm_idle_work_handler);
+
+	if (radeon_dynpm != -1 && radeon_dynpm) {
+		rdev->pm.state = PM_STATE_PAUSED;
+		DRM_INFO("radeon: dynamic power management enabled\n");
+	}
+
+	DRM_INFO("radeon: power management initialized\n");
+
 	return 0;
 }
 
+void radeon_pm_compute_clocks(struct radeon_device *rdev)
+{
+	struct drm_device *ddev = rdev->ddev;
+	struct drm_connector *connector;
+	struct radeon_crtc *radeon_crtc;
+	int count = 0;
+
+	if (rdev->pm.state == PM_STATE_DISABLED)
+		return;
+
+	mutex_lock(&rdev->pm.mutex);
+
+	rdev->pm.active_crtcs = 0;
+	list_for_each_entry(connector,
+		&ddev->mode_config.connector_list, head) {
+		if (connector->encoder &&
+			connector->dpms != DRM_MODE_DPMS_OFF) {
+			radeon_crtc = to_radeon_crtc(connector->encoder->crtc);
+			rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
+			++count;
+		}
+	}
+
+	if (count > 1) {
+		if (rdev->pm.state == PM_STATE_ACTIVE) {
+			cancel_delayed_work(&rdev->pm.idle_work);
+
+			rdev->pm.state = PM_STATE_PAUSED;
+			rdev->pm.planned_action = PM_ACTION_UPCLOCK;
+			if (rdev->pm.downclocked)
+				radeon_pm_set_clocks(rdev);
+
+			DRM_DEBUG("radeon: dynamic power management deactivated\n");
+		}
+	} else if (count == 1) {
+		/* TODO: Increase clocks if needed for current mode */
+
+		if (rdev->pm.state == PM_STATE_MINIMUM) {
+			rdev->pm.state = PM_STATE_ACTIVE;
+			rdev->pm.planned_action = PM_ACTION_UPCLOCK;
+			radeon_pm_set_clocks(rdev);
+
+			queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
+				msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+		}
+		else if (rdev->pm.state == PM_STATE_PAUSED) {
+			rdev->pm.state = PM_STATE_ACTIVE;
+			queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
+				msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+			DRM_DEBUG("radeon: dynamic power management activated\n");
+		}
+	}
+	else { /* count == 0 */
+		if (rdev->pm.state != PM_STATE_MINIMUM) {
+			cancel_delayed_work(&rdev->pm.idle_work);
+
+			rdev->pm.state = PM_STATE_MINIMUM;
+			rdev->pm.planned_action = PM_ACTION_MINIMUM;
+			radeon_pm_set_clocks(rdev);
+		}
+	}
+
+	mutex_unlock(&rdev->pm.mutex);
+}
+
+static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
+{
+	u32 stat_crtc1 = 0, stat_crtc2 = 0;
+	bool in_vbl = true;
+
+	if (ASIC_IS_AVIVO(rdev)) {
+		if (rdev->pm.active_crtcs & (1 << 0)) {
+			stat_crtc1 = RREG32(D1CRTC_STATUS);
+			if (!(stat_crtc1 & 1))
+				in_vbl = false;
+		}
+		if (rdev->pm.active_crtcs & (1 << 1)) {
+			stat_crtc2 = RREG32(D2CRTC_STATUS);
+			if (!(stat_crtc2 & 1))
+				in_vbl = false;
+		}
+	}
+	if (in_vbl == false)
+		DRM_INFO("not in vbl for pm change %08x %08x at %s\n", stat_crtc1,
+			 stat_crtc2, finish ? "exit" : "entry");
+	return in_vbl;
+}
+static void radeon_pm_set_clocks_locked(struct radeon_device *rdev)
+{
+	/*radeon_fence_wait_last(rdev);*/
+	switch (rdev->pm.planned_action) {
+	case PM_ACTION_UPCLOCK:
+		rdev->pm.downclocked = false;
+		break;
+	case PM_ACTION_DOWNCLOCK:
+		rdev->pm.downclocked = true;
+		break;
+	case PM_ACTION_MINIMUM:
+		break;
+	case PM_ACTION_NONE:
+		DRM_ERROR("%s: PM_ACTION_NONE\n", __func__);
+		break;
+	}
+
+	/* check if we are in vblank */
+	radeon_pm_debug_check_in_vbl(rdev, false);
+	radeon_set_power_state(rdev);
+	radeon_pm_debug_check_in_vbl(rdev, true);
+	rdev->pm.planned_action = PM_ACTION_NONE;
+}
+
+static void radeon_pm_set_clocks(struct radeon_device *rdev)
+{
+	radeon_get_power_state(rdev, rdev->pm.planned_action);
+	mutex_lock(&rdev->cp.mutex);
+
+	if (rdev->pm.active_crtcs & (1 << 0)) {
+		rdev->pm.req_vblank |= (1 << 0);
+		drm_vblank_get(rdev->ddev, 0);
+	}
+	if (rdev->pm.active_crtcs & (1 << 1)) {
+		rdev->pm.req_vblank |= (1 << 1);
+		drm_vblank_get(rdev->ddev, 1);
+	}
+	if (rdev->pm.active_crtcs)
+		wait_event_interruptible_timeout(
+			rdev->irq.vblank_queue, 0,
+			msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
+	if (rdev->pm.req_vblank & (1 << 0)) {
+		rdev->pm.req_vblank &= ~(1 << 0);
+		drm_vblank_put(rdev->ddev, 0);
+	}
+	if (rdev->pm.req_vblank & (1 << 1)) {
+		rdev->pm.req_vblank &= ~(1 << 1);
+		drm_vblank_put(rdev->ddev, 1);
+	}
+
+	radeon_pm_set_clocks_locked(rdev);
+	mutex_unlock(&rdev->cp.mutex);
+}
+
+static void radeon_pm_idle_work_handler(struct work_struct *work)
+{
+	struct radeon_device *rdev;
+	rdev = container_of(work, struct radeon_device,
+				pm.idle_work.work);
+
+	mutex_lock(&rdev->pm.mutex);
+	if (rdev->pm.state == PM_STATE_ACTIVE) {
+		unsigned long irq_flags;
+		int not_processed = 0;
+
+		read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
+		if (!list_empty(&rdev->fence_drv.emited)) {
+			struct list_head *ptr;
+			list_for_each(ptr, &rdev->fence_drv.emited) {
+				/* count up to 3, that's enought info */
+				if (++not_processed >= 3)
+					break;
+			}
+		}
+		read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
+
+		if (not_processed >= 3) { /* should upclock */
+			if (rdev->pm.planned_action == PM_ACTION_DOWNCLOCK) {
+				rdev->pm.planned_action = PM_ACTION_NONE;
+			} else if (rdev->pm.planned_action == PM_ACTION_NONE &&
+				rdev->pm.downclocked) {
+				rdev->pm.planned_action =
+					PM_ACTION_UPCLOCK;
+				rdev->pm.action_timeout = jiffies +
+				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
+			}
+		} else if (not_processed == 0) { /* should downclock */
+			if (rdev->pm.planned_action == PM_ACTION_UPCLOCK) {
+				rdev->pm.planned_action = PM_ACTION_NONE;
+			} else if (rdev->pm.planned_action == PM_ACTION_NONE &&
+				!rdev->pm.downclocked) {
+				rdev->pm.planned_action =
+					PM_ACTION_DOWNCLOCK;
+				rdev->pm.action_timeout = jiffies +
+				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
+			}
+		}
+
+		if (rdev->pm.planned_action != PM_ACTION_NONE &&
+		    jiffies > rdev->pm.action_timeout) {
+			radeon_pm_set_clocks(rdev);
+		}
+	}
+	mutex_unlock(&rdev->pm.mutex);
+
+	queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
+					msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+}
+
 /*
  * Debugfs info
  */
@@ -44,11 +436,14 @@ static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	struct radeon_device *rdev = dev->dev_private;
 
+	seq_printf(m, "state: %s\n", pm_state_names[rdev->pm.state]);
 	seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.default_sclk);
 	seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
 	seq_printf(m, "default memory clock: %u0 kHz\n", rdev->clock.default_mclk);
 	if (rdev->asic->get_memory_clock)
 		seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
+	if (rdev->asic->get_pcie_lanes)
+		seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
 
 	return 0;
 }
@@ -58,7 +453,7 @@ static struct drm_info_list radeon_pm_info_list[] = {
 };
 #endif
 
-int radeon_debugfs_pm_init(struct radeon_device *rdev)
+static int radeon_debugfs_pm_init(struct radeon_device *rdev)
 {
 #if defined(CONFIG_DEBUG_FS)
 	return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));