[PATCH 06/10] drm/exynos: add wait_for_vblank callback interface.

this interface can be used to make sure that hardware overlay is disabled to avoid that memory region is accessed by dma after gem buffer was released. Signed-off-by: Inki Dae Signed-off-by: Kyungmin Park --- drivers/gpu/drm/exynos/exynos_drm_drv.h | 17 + drivers/gpu/drm/

[PATCH 06/10] drm/exynos: add wait_for_vblank callback interface.

this interface can be used to make sure that hardware overlay is disabled to avoid that memory region is accessed by dma after gem buffer was released. Signed-off-by: Inki Dae Signed-off-by: Kyungmin Park --- drivers/gpu/drm/exynos/exynos_drm_drv.h | 17 + drivers/gpu/drm/