diff --git a/drivers/gpu/drm/rockchip/rockchip_rgb.h b/drivers/gpu/drm/rockchip/rockchip_rgb.h
index c712a673d1e3..38b52e63b2b0 100644
--- a/drivers/gpu/drm/rockchip/rockchip_rgb.h
+++ b/drivers/gpu/drm/rockchip/rockchip_rgb.h
@@ -14,7 +14,20 @@
  * GNU General Public License for more details.
  */
 
+#ifdef CONFIG_ROCKCHIP_RGB
 struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 				       struct drm_crtc *crtc,
 				       struct drm_device *drm_dev);
 void rockchip_rgb_fini(struct rockchip_rgb *rgb);
+#else
+static inline struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
+						     struct drm_crtc *crtc,
+						     struct drm_device *drm_dev)
+{
+	return NULL;
+}
+
+static inline void rockchip_rgb_fini(struct rockchip_rgb *rgb)
+{
+}
+#endif