[PATCH 3/3] arm64: dts: rk3399-rock-pi-4c: Enable Display Port

[Jagan Teki]

Enable Display Port on ROCK Pi 4C board.

Unlike, other RK3399 platforms with accessing DP Altmode
via Type-C connector, the display Port on ROCK Pi 4C is
accessible via physical display port connector by means
of Type-C Virtual PD extcon configuration.

Enable support for it.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 .../boot/dts/rockchip/rk3399-rock-pi-4c.dts      | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
index 4c7ebb1c5d2d..19a648add355 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
@@ -11,6 +11,22 @@
 / {
 	model = "Radxa ROCK Pi 4C";
 	compatible = "radxa,rockpi4c", "radxa,rockpi4", "rockchip,rk3399";
+
+	virtual_pd: virtual-pd {
+		compatible = "linux,extcon-usbc-virtual-pd";
+		det-gpios = <&gpio4 RK_PD1 GPIO_ACTIVE_LOW>;	/* DP_HPD */
+		vpd-data-role = "display-port";
+		vpd-super-speed;
+	};
+};
+
+&cdn_dp {
+	extcon = <&virtual_pd>;
+	status = "okay";
+};
+
+&tcphy0 {
+	extcon = <&virtual_pd>;
 };
 
 &sdio0 {
-- 
2.25.1