[PATCH] drm/exynos: do not wait for vblank at atomic operation

Inki Dae inki.dae at samsung.com
Fri Jun 19 05:03:35 PDT 2015

This patch resolves the issue that refresh rate got low
at extension mode test with fimd and vidi combination.

The problem was because atomic_commit callback waited
for the completion of vblank to gaurantee crtc relevant
registers are updated from shadow registers to real ones.

However, the waiting there is really unnecessary because
page flip operation does already it.

Signed-off-by: Inki Dae <inki.dae at samsung.com>
 drivers/gpu/drm/exynos/exynos_drm_fb.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index 789db6f..2b6320e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -295,8 +295,6 @@ static int exynos_atomic_commit(struct drm_device *dev,
 	drm_atomic_helper_commit_planes(dev, state);
-	drm_atomic_helper_wait_for_vblanks(dev, state);
 	drm_atomic_helper_cleanup_planes(dev, state);

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