[PATCH 6/8] drm/exynos: add complete_scanout interface

Before freeing a framebuffer, we call complete_scanout encoder function which just calls wait for vblank of all the encoders. This is not a very optimized method since a framebuffer might not be in use by a crtc and we end up waiting for vblank unnecessarily. Instead, this patch modifies the wait_

[PATCH 6/8] drm/exynos: add complete_scanout interface

Before freeing a framebuffer, we call complete_scanout encoder function which just calls wait for vblank of all the encoders. This is not a very optimized method since a framebuffer might not be in use by a crtc and we end up waiting for vblank unnecessarily. Instead, this patch modifies the wait_