[PATCH 48/53] drm/radeon/dpm: add new callback for powergating UVD (v3)

[Alex Deucher]

Starting on CIK, multi-media blocks like UVD no longer
have special power state.  Rather they have their own
DPM implementation which adjusts their clocks dynamically
when active.  When they are not active, the blocks are
powergated to save power.

v2: add missing pm locks
v3: rebase on uvd state selection rework

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/radeon.h    |  2 ++
 drivers/gpu/drm/radeon/radeon_pm.c | 43 ++++++++++++++++++++++----------------
 2 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 297e744..09a2434 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1730,6 +1730,7 @@ struct radeon_asic {
 		void (*debugfs_print_current_performance_level)(struct radeon_device *rdev, struct seq_file *m);
 		int (*force_performance_level)(struct radeon_device *rdev, enum radeon_dpm_forced_level level);
 		bool (*vblank_too_short)(struct radeon_device *rdev);
+		void (*powergate_uvd)(struct radeon_device *rdev, bool gate);
 	} dpm;
 	/* pageflipping */
 	struct {
@@ -2518,6 +2519,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v);
 #define radeon_dpm_debugfs_print_current_performance_level(rdev, m) rdev->asic->dpm.debugfs_print_current_performance_level((rdev), (m))
 #define radeon_dpm_force_performance_level(rdev, l) rdev->asic->dpm.force_performance_level((rdev), (l))
 #define radeon_dpm_vblank_too_short(rdev) rdev->asic->dpm.vblank_too_short((rdev))
+#define radeon_dpm_powergate_uvd(rdev, g) rdev->asic->dpm.powergate_uvd((rdev), (g))
 
 /* Common functions */
 /* AGP */
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 66b04af..a44ae9a 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -886,28 +886,35 @@ void radeon_dpm_enable_uvd(struct radeon_device *rdev, bool enable)
 {
 	enum radeon_pm_state_type dpm_state;
 
-	if (enable) {
+	if (rdev->asic->dpm.powergate_uvd) {
 		mutex_lock(&rdev->pm.mutex);
-		rdev->pm.dpm.uvd_active = true;
-		if ((rdev->pm.dpm.sd == 1) && (rdev->pm.dpm.hd == 0))
-			dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_SD;
-		else if ((rdev->pm.dpm.sd == 2) && (rdev->pm.dpm.hd == 0))
-			dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
-		else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 1))
-			dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
-		else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 2))
-			dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD2;
-		else
-			dpm_state = POWER_STATE_TYPE_INTERNAL_UVD;
-		rdev->pm.dpm.state = dpm_state;
+		/* enable/disable UVD */
+		radeon_dpm_powergate_uvd(rdev, enable);
 		mutex_unlock(&rdev->pm.mutex);
 	} else {
-		mutex_lock(&rdev->pm.mutex);
-		rdev->pm.dpm.uvd_active = false;
-		mutex_unlock(&rdev->pm.mutex);
-	}
+		if (enable) {
+			mutex_lock(&rdev->pm.mutex);
+			rdev->pm.dpm.uvd_active = true;
+			if ((rdev->pm.dpm.sd == 1) && (rdev->pm.dpm.hd == 0))
+				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_SD;
+			else if ((rdev->pm.dpm.sd == 2) && (rdev->pm.dpm.hd == 0))
+				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
+			else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 1))
+				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
+			else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 2))
+				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD2;
+			else
+				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD;
+			rdev->pm.dpm.state = dpm_state;
+			mutex_unlock(&rdev->pm.mutex);
+		} else {
+			mutex_lock(&rdev->pm.mutex);
+			rdev->pm.dpm.uvd_active = false;
+			mutex_unlock(&rdev->pm.mutex);
+		}
 
-	radeon_pm_compute_clocks(rdev);
+		radeon_pm_compute_clocks(rdev);
+	}
 }
 
 static void radeon_pm_suspend_old(struct radeon_device *rdev)
-- 
1.8.3.1