[PATCH v5 2/3] drm: Allow drivers to choose plane types to async flip

[André Almeida]

Different planes may have different capabilities of doing async flips,
so create a field to let drivers allow async flip per plane type.

Signed-off-by: André Almeida <andrealmeid@xxxxxxxxxx>
---
 drivers/gpu/drm/drm_atomic_uapi.c | 4 ++--
 drivers/gpu/drm/drm_plane.c       | 3 +++
 include/drm/drm_plane.h           | 5 +++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 2e1d9391febe..dd4b1578f141 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -1079,9 +1079,9 @@ int drm_atomic_set_property(struct drm_atomic_state *state,
 			break;
 		}
 
-		if (async_flip && plane_state->plane->type != DRM_PLANE_TYPE_PRIMARY) {
+		if (async_flip && !plane_state->plane->async_flip) {
 			drm_dbg_atomic(prop->dev,
-				       "[OBJECT:%d] Only primary planes can be changed during async flip\n",
+				       "[OBJECT:%d] This type of plane cannot be changed during async flip\n",
 				       obj->id);
 			ret = -EINVAL;
 			break;
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 57662a1fd345..bbcec3940636 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -385,6 +385,9 @@ static int __drm_universal_plane_init(struct drm_device *dev,
 
 	drm_modeset_lock_init(&plane->mutex);
 
+	if (type == DRM_PLANE_TYPE_PRIMARY)
+		plane->async_flip = true;
+
 	plane->base.properties = &plane->properties;
 	plane->dev = dev;
 	plane->funcs = funcs;
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 9507542121fa..0bebc72af5c3 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -786,6 +786,11 @@ struct drm_plane {
 	 * @kmsg_panic: Used to register a panic notifier for this plane
 	 */
 	struct kmsg_dumper kmsg_panic;
+
+	/**
+	 * @async_flip: indicates if a plane can do async flips
+	 */
+	bool async_flip;
 };
 
 #define obj_to_plane(x) container_of(x, struct drm_plane, base)
-- 
2.45.2