arm64: dts: ti: verdin-am62: Add DSI display support

Add MIPI-DSI support to Verdin AM62.

Verdin AM62 has a MIPI DSI interface on the edge connector, this is
provided with a Toshiba TC358778 DPI to MIPI-DSI bridge connected to the
DSS DPI port with a 18-bit width parallel bus.

Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20230812191123.14779-1-francesco@dolcini.it
Signed-off-by: Nishanth Menon <nm@ti.com>

Author: dolcini

arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi

@@ -815,6 +815,26 @@
 	};
 };
 
+&dss {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_parallel_rgb>;
+	status = "disabled";
+};
+
+&dss_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	/* VP2: DPI Output */
+	port@1 {
+		reg = <1>;
+
+		dpi_out: endpoint {
+			remote-endpoint = <&rgb_in>;
+		};
+	};
+};
+
 /* Verdin PWM_1, PWM_2 */
 &epwm0 {
 	pinctrl-names = "default";
@@ -1051,6 +1071,7 @@
 
 				rgb_in: endpoint {
 					data-lines = <18>;
+					remote-endpoint = <&dpi_out>;
 				};
 			};