1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 49b0a8b9ac02..4c1a45ac18e6 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -61,6 +61,18 @@
  * userspace too much.
  */
 
+/**
+ * DOC: standard plane properties
+ *
+ * DRM planes have a few standardized properties:
+ *
+ * IN_FORMATS:
+ *     Blob property which contains the set of buffer format and modifier
+ *     pairs supported by this plane. The blob is a drm_format_modifier_blob
+ *     struct. Without this property the plane doesn't support buffers with
+ *     modifiers. Userspace cannot change this property.
+ */
+
 static unsigned int drm_num_planes(struct drm_device *dev)
 {
 	unsigned int num = 0;