[PATCH 2/2] drm/virtio: Recalculate ignore_damage_clips on every update

[Lyude Paul <lyude@redhat.com>]

From: Christian Hergert <christian@sourceandstack.com>

Plane state duplication preserves ignore_damage_clips. Once fbdev sets
it for a dumb buffer, later updates using rendered resources continue to
ignore damage because the flag is never cleared.

Assign ignore_damage_clips on every atomic check so rendered resources
can use supplied damage after an earlier dumb-buffer update.

Signed-off-by: Christian Hergert <christian@sourceandstack.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/virtio/virtgpu_plane.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index d9579a4b4714c..95ec688690d3a 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -119,8 +119,8 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
 	 * so preserve userspace's accumulated per-buffer damage for those.
 	 */
 	bo = gem_to_virtio_gpu_obj(new_plane_state->fb->obj[0]);
-	if (old_plane_state->fb != new_plane_state->fb && bo->dumb)
-		new_plane_state->ignore_damage_clips = true;
+	new_plane_state->ignore_damage_clips =
+		old_plane_state->fb != new_plane_state->fb && bo->dumb;
 
 	crtc_state = drm_atomic_get_crtc_state(state,
 					       new_plane_state->crtc);
-- 
2.55.0