diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 31a914375bef..a1a02a099211 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -1509,6 +1509,7 @@ static const struct dw_hdmi_plat_data rk3399_hdmi_drv_data = {
 	.phy_config = rockchip_phy_config,
 	.phy_data = &rk3399_chip_data,
 	.use_drm_infoframe = true,
+	.ycbcr_420_allowed = true,
 };
 
 static struct rockchip_hdmi_chip_data rk3568_chip_data = {