diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index e26936309e075..559db96c2f8c2 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -516,6 +516,7 @@ EXPORT_SYMBOL(drm_dp_downstream_max_bpc); /** * drm_dp_downstream_id() - identify branch device * @aux: DisplayPort AUX channel + * @id: DisplayPort branch device id * * Returns branch device id on success or NULL on failure */