diff --git a/include/drm/drm_framebuffer.h b/include/drm/drm_framebuffer.h
index a3d2f25..79640c3 100644
--- a/include/drm/drm_framebuffer.h
+++ b/include/drm/drm_framebuffer.h
@@ -286,4 +286,10 @@
 					  struct drm_framebuffer, head);	\
 	     &fb->head != (&(dev)->mode_config.fb_list);			\
 	     fb = list_next_entry(fb, head))
+
+int drm_framebuffer_plane_width(int width,
+				const struct drm_framebuffer *fb, int plane);
+int drm_framebuffer_plane_height(int height,
+				 const struct drm_framebuffer *fb, int plane);
+
 #endif