diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
index 7b8ec831069981fa74b4a5c6da8fa087ae38b701..18ed14911b981b7869dc5e54e1f5a8f9540ffd33 100644
--- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
+++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
@@ -75,6 +75,7 @@ static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi, void *data,
 }
 
 static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
+	.output_port = 1,
 	.mode_valid = rcar_hdmi_mode_valid,
 	.configure_phy	= rcar_hdmi_phy_configure,
 };