[PATCH [RFC] v3 5/7] drm/atomic: Allow planes with NULL fb along with async flip

[Arun R Murthy <arun.r.murthy@intel.com>]

Along with async flip if there is a request to disable a sync plane by
providing a NULL fb allow them.

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 drivers/gpu/drm/drm_atomic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index fc938ea467e239edd6be77b7467c45ac8c8379fd..f0718a26e441ec1c9e118503936cb597211835e9 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -718,7 +718,9 @@ static int drm_atomic_plane_async_check(const struct drm_plane_state *old_plane_
 	struct drm_crtc *crtc = new_plane_state->crtc;
 	struct drm_crtc_state *new_crtc_state = crtc->state;
 
-	if (!new_plane_state->async_flip)
+	if (new_crtc_state->async_flip && new_plane_state->fb == 0)
+		return 0;
+	else if (!new_plane_state->async_flip && !new_crtc_state->async_flip)
 		return 0;
 
 	/*

-- 
2.25.1