[Intel-gfx] [PATCH] drm/i915: Don't wait for vblank for sprite plane flips

[Vijay Purushothaman]

Since the sprite planes are using synchronized MMIO based flip, no need
to wait for vblank. Removing this wait allows us to get a nice
performance boost to both 3D & media workloads based on sprite (~60 fps
from ~20 fps)

Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman at intel.com>
Signed-off-by: Gary Smith <gary.k.smith at intel.com>
---
 drivers/gpu/drm/i915/intel_sprite.c |   14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 1fa5612..1d14fc0 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -828,20 +828,8 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 		intel_disable_primary(crtc);
 
 	/* Unpin old obj after new one is active to avoid ugliness */
-	if (old_obj) {
-		/*
-		 * It's fairly common to simply update the position of
-		 * an existing object.  In that case, we don't need to
-		 * wait for vblank to avoid ugliness, we only need to
-		 * do the pin & ref bookkeeping.
-		 */
-		if (old_obj != obj) {
-			mutex_unlock(&dev->struct_mutex);
-			intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe);
-			mutex_lock(&dev->struct_mutex);
-		}
+	if (old_obj)
 		intel_unpin_fb_obj(old_obj);
-	}
 
 out_unlock:
 	mutex_unlock(&dev->struct_mutex);
-- 
1.7.9.5