diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 3f3ff820b1b9..14adf6e8ff47 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -461,6 +461,7 @@ static const struct dw_hdmi_plat_data rk3568_hdmi_drv_data = {
 	.phy_config = rockchip_phy_config,
 	.phy_data = &rk3568_chip_data,
 	.use_drm_infoframe = true,
+	.output_port = 1,
 };
 
 static const struct of_device_id dw_hdmi_rockchip_dt_ids[] = {