diff -drupN a/include/drm/drm_plane.h b/include/drm/drm_plane.h
--- a/include/drm/drm_plane.h	2018-08-06 17:23:04.000000000 +0300
+++ b/include/drm/drm_plane.h	2022-06-12 05:28:14.000000000 +0300
@@ -65,7 +65,7 @@ struct drm_plane_state {
 
 	struct drm_crtc *crtc;   /* do not write directly, use drm_atomic_set_crtc_for_plane() */
 	struct drm_framebuffer *fb;  /* do not write directly, use drm_atomic_set_fb_for_plane() */
-	struct fence *fence;
+	struct fence *fence; /* do not write directly, use drm_atomic_set_fence_for_plane() */
 
 	/* Signed dest location allows it to be partially off screen */
 	int32_t crtc_x, crtc_y;