The driver does per-buffer uploads and needs to force a full plane update
if the plane's attached framebuffer has change since the last page-flip.
Suggested-by: Sima Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
(no changes since v2)
Changes in v2:
- Set struct drm_plane_state .ignore_damage_clips in vmwgfx plane's
.atomic_check instead of using a different helpers (Thomas Zimmermann).
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 818b7f109f53..f9364bf222e3 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -837,10 +837,21 @@ int vmw_du_primary_plane_atomic_check(struct drm_plane *plane,
{
struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
plane);
+ struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
+ plane);
struct drm_crtc_state *crtc_state = NULL;
struct drm_framebuffer *new_fb = new_state->fb;
+ struct drm_framebuffer *old_fb = old_state->fb;
int ret;
+ /*
+ * Ignore damage clips if the framebuffer attached to the plane's state
+ * has changed since the last plane update (page-flip). In this case, a
+ * full plane update should happen because uploads are done per-buffer.
+ */
+ if (old_fb != new_fb)
+ new_state->ignore_damage_clips = true;
+
if (new_state->crtc)
crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
--
2.41.0
