diff --git a/src/gallium/auxiliary/renderonly/renderonly.h b/src/gallium/auxiliary/renderonly/renderonly.h
index 0d08a16e30f..0eafbf548a9 100644
--- a/src/gallium/auxiliary/renderonly/renderonly.h
+++ b/src/gallium/auxiliary/renderonly/renderonly.h
@@ -55,6 +55,21 @@ struct renderonly {
     *   resource into the scanout hw.
     * - Make it easier for a gallium driver to detect if anything special needs
     *   to be done in flush_resource(..) like a resolve to linear.
+    *
+    * When the screen has renderonly enabled, drivers need to follow these
+    * rules:
+    * - Create the scanout resource in resource_create and
+    *   resource_create_with_modifiers if PIPE_BIND_SCANOUT is set. Drivers
+    *   can fail if the scanout resource couldn't be created.
+    * - Try to import the scanout resource in resource_from_handle with
+    *   renderonly_create_gpu_import_for_resource. Drivers MUST NOT fail if
+    *   the scanout resource couldn't be created.
+    * - In a resource_get_handle call for WINSYS_HANDLE_TYPE_KMS, use
+    *   renderonly_get_handle with the scanout resource, even if the scanout
+    *   resource is NULL. Drivers MUST NOT return their own resource here,
+    *   because the GEM handle will not be valid for the caller's DRM FD.
+    * - Implement resource_get_params for at least PIPE_RESOURCE_PARAM_STRIDE,
+    *   PIPE_RESOURCE_PARAM_OFFSET and PIPE_RESOURCE_PARAM_MODIFIER.
     */
    struct renderonly_scanout *(*create_for_resource)(struct pipe_resource *rsc,
                                                      struct renderonly *ro,