[PATCH 3/3] arm64: dts: rockchip: Add USB-C DP AltMode for Orange Pi 5/5B

[Arun Iyengar via B4 Relay]

From: Arun Iyengar <aiyengar1990 at gmail.com>

The USB-C port of the Orange Pi 5 and 5B is connected to the RK3588S
USBDP PHY0, which can mux two (pin assignment D) or all four (pin
assignment C/E) of its SuperSpeed lanes to the DisplayPort controller
DP0. The SBU lines are wired to the PHY's DP AUX channel through the
sbu1/sbu2 DC control GPIOs that are already described.

Enable DP0, route it from VOP2 video port 2 and describe the full
USB-C graph using the USBDP PHY ports scheme:

  port at 0: SuperSpeed lanes to the USB-C connector
  port at 1: from the DWC3 controller (SuperSpeed)
  port at 2: from the DP controller
  port at 3: DP AUX to the connector's SBU port

and advertise DisplayPort AltMode (DFP_D, HBR3, receptacle, pin
assignments C/D/E) on the connector, so TCPM enters DP AltMode with
DP capable sinks/adapters.

VP2 is used as on the ROCK 5B family, leaving VP0 for HDMI0 and VP1
free.

Modelled on Sebastian Reichel's ROCK 5B family DP Alt Mode support in
the Collabora rockchip-3588 tree.

Signed-off-by: Arun Iyengar <aiyengar1990 at gmail.com>
---
 .../boot/dts/rockchip/rk3588s-orangepi-5-5b.dtsi   | 89 +++++++++++++++++++---
 1 file changed, 78 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-5-5b.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-5-5b.dtsi
index 7c1fd5905553..52f5005c738d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-5-5b.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-5-5b.dtsi
@@ -94,6 +94,22 @@ vcc_3v3_sd_s0: regulator-vcc-3v3-sd-s0 {
 	};
 };
 
+&dp0 {
+	status = "okay";
+};
+
+&dp0_in {
+	dp0_in_vp2: endpoint {
+		remote-endpoint = <&vp2_out_dp0>;
+	};
+};
+
+&dp0_out {
+	dp0_out_con: endpoint {
+		remote-endpoint = <&usbdp_phy0_dp_in>;
+	};
+};
+
 &gmac1 {
 	clock_in_out = "output";
 	phy-handle = <&rgmii_phy1>;
@@ -143,6 +159,13 @@ usb_con: connector {
 				<PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>;
 			try-power-role = "source";
 
+			altmodes {
+				displayport {
+					svid = /bits/ 16 <0xff01>;
+					vdo = <0x00001c46>;
+				};
+			};
+
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -150,21 +173,21 @@ ports {
 				port at 0 {
 					reg = <0>;
 					usbc0_hs: endpoint {
-						remote-endpoint = <&usb_host0_xhci_drd_sw>;
+						remote-endpoint = <&usb_host0_xhci_hs>;
 					};
 				};
 
 				port at 1 {
 					reg = <1>;
 					usbc0_ss: endpoint {
-						remote-endpoint = <&usbdp_phy0_typec_ss>;
+						remote-endpoint = <&usbdp_phy0_ss_out>;
 					};
 				};
 
 				port at 2 {
 					reg = <2>;
 					usbc0_sbu: endpoint {
-						remote-endpoint = <&usbdp_phy0_typec_sbu>;
+						remote-endpoint = <&usbdp_phy0_dp_out>;
 					};
 				};
 			};
@@ -250,9 +273,24 @@ &usb_host0_xhci {
 	dr_mode = "otg";
 	usb-role-switch;
 
-	port {
-		usb_host0_xhci_drd_sw: endpoint {
-			remote-endpoint = <&usbc0_hs>;
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port at 0 {
+			reg = <0>;
+
+			usb_host0_xhci_hs: endpoint {
+				remote-endpoint = <&usbc0_hs>;
+			};
+		};
+
+		port at 1 {
+			reg = <1>;
+
+			usb_host0_xhci_ss: endpoint {
+				remote-endpoint = <&usbdp_phy0_ss_in>;
+			};
 		};
 	};
 };
@@ -267,18 +305,47 @@ &usbdp_phy0 {
 	sbu1-dc-gpios = <&gpio4 RK_PA5 GPIO_ACTIVE_HIGH>;
 	sbu2-dc-gpios = <&gpio4 RK_PA7 GPIO_ACTIVE_HIGH>;
 
-	port {
+	ports {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		usbdp_phy0_typec_ss: endpoint at 0 {
+		port at 0 {
 			reg = <0>;
-			remote-endpoint = <&usbc0_ss>;
+
+			usbdp_phy0_ss_out: endpoint {
+				remote-endpoint = <&usbc0_ss>;
+			};
 		};
 
-		usbdp_phy0_typec_sbu: endpoint at 1 {
+		port at 1 {
 			reg = <1>;
-			remote-endpoint = <&usbc0_sbu>;
+
+			usbdp_phy0_ss_in: endpoint {
+				remote-endpoint = <&usb_host0_xhci_ss>;
+			};
 		};
+
+		port at 2 {
+			reg = <2>;
+
+			usbdp_phy0_dp_in: endpoint {
+				remote-endpoint = <&dp0_out_con>;
+			};
+		};
+
+		port at 3 {
+			reg = <3>;
+
+			usbdp_phy0_dp_out: endpoint {
+				remote-endpoint = <&usbc0_sbu>;
+			};
+		};
+	};
+};
+
+&vp2 {
+	vp2_out_dp0: endpoint at a {
+		reg = <ROCKCHIP_VOP2_EP_DP0>;
+		remote-endpoint = <&dp0_in_vp2>;
 	};
 };

-- 
2.55.0