diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
index 6afd0af312ba..64e9f0b86e58 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
@@ -79,7 +79,7 @@ static const struct drm_connector_funcs connector_funcs = {
 
 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
 				struct rcar_du_encoder *renc,
-				/* TODO const */ struct device_node *np)
+				const struct device_node *np)
 {
 	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
 	struct rcar_du_lvds_connector *lvdscon;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
index d4881ee0be7e..639071dd235c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
@@ -19,6 +19,6 @@ struct rcar_du_encoder;
 
 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
 				struct rcar_du_encoder *renc,
-				struct device_node *np);
+				const struct device_node *np);
 
 #endif /* __RCAR_DU_LVDSCON_H__ */