User-space is allowed to submit any property in an async flip as
long as the value doesn't change. However we missed one case:
as things stand, the kernel rejects no-op FB_ID changes on
non-primary planes. Fix this by changing the conditional and
skipping drm_atomic_check_prop_changes() only for FB_ID on the
primary plane (instead of skipping for FB_ID on any plane).
Fixes: 0e26cc72c71c ("drm: Refuse to async flip with atomic prop changes")
Signed-off-by: Simon Ser <contact@xxxxxxxxxxx>
Cc: André Almeida <andrealmeid@xxxxxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Michel Dänzer <michel.daenzer@xxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic_uapi.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 22bbb2d83e30..1764bb0dbbdf 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -1070,21 +1070,14 @@ int drm_atomic_set_property(struct drm_atomic_state *state,
break;
}
- if (async_flip && prop != config->prop_fb_id) {
+ if (async_flip && (prop != config->prop_fb_id ||
+ plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY)) {
ret = drm_atomic_plane_get_property(plane, plane_state,
prop, &old_val);
ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);
break;
}
- if (async_flip && plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY) {
- drm_dbg_atomic(prop->dev,
- "[OBJECT:%d] Only primary planes can be changed during async flip\n",
- obj->id);
- ret = -EINVAL;
- break;
- }
-
ret = drm_atomic_plane_set_property(plane,
plane_state, file_priv,
prop, prop_value);
--
2.45.2
