return ret;
 }
 
-static struct drm_bridge_funcs adv7511_bridge_funcs = {
+static const struct drm_bridge_funcs adv7511_bridge_funcs = {
        .enable = adv7511_bridge_enable,
        .disable = adv7511_bridge_disable,
        .mode_set = adv7511_bridge_mode_set,
 
        return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge);
 }
 
-static struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = {
+static const struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = {
        .mode_set     = dw_mipi_dsi_bridge_mode_set,
        .enable       = dw_mipi_dsi_bridge_enable,
        .post_disable = dw_mipi_dsi_bridge_post_disable,