diff --git a/drivers/gpu/drm/ast/ast_sil164.c b/drivers/gpu/drm/ast/ast_sil164.c
index 496c7120e515536cae3496554e89bf7f7e8731d9..c231389936bdab181767e253b13e02e6f8a099de 100644
--- a/drivers/gpu/drm/ast/ast_sil164.c
+++ b/drivers/gpu/drm/ast/ast_sil164.c
@@ -29,6 +29,8 @@ static int ast_sil164_connector_helper_get_modes(struct drm_connector *connector
 	if (ast_connector->physical_status == connector_status_connected) {
 		count = drm_connector_helper_get_modes(connector);
 	} else {
+		drm_edid_connector_update(connector, NULL);
+
 		/*
 		 * There's no EDID data without a connected monitor. Set BMC-
 		 * compatible modes in this case. The XGA default resolution