[PATCH v4 4/4] arm64: dts: mediatek: cherry: Add edptx and dptx support

[Bo-Chen Chen <rex-bc.chen@mediatek.com>]

In cherry projects, we use edptx as the internal display interface
and use dptx as the external display interface. To support this, we
need to add more properties.

- Add pinctrls for edptx and dptx.
- Add ports for edptx and dptx.

The port connections for the internal and external display:
dp-intf0 -> edptx -> panel
dp-intf1 -> dptx

The edptx endpoint is kept empty for now, as the panel addition will
come in a later commit.

Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../boot/dts/mediatek/mt8195-cherry.dtsi      | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 303dc32c64dc..560103e29017 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -125,6 +125,7 @@
 
 	port {
 		dp_intf0_out: endpoint {
+			remote-endpoint = <&edp_in>;
 		};
 	};
 };
@@ -134,6 +135,59 @@
 
 	port {
 		dp_intf1_out: endpoint {
+			remote-endpoint = <&dptx_in>;
+		};
+	};
+};
+
+&edp_tx {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&edptx_pins_default>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			edp_in: endpoint {
+				remote-endpoint = <&dp_intf0_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			edp_out: endpoint {
+				data-lanes = <0 1 2 3>;
+			};
+		};
+	};
+};
+
+&dp_tx {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&dptx_pin>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			dptx_in: endpoint {
+				remote-endpoint = <&dp_intf1_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			dptx_out: endpoint {
+				data-lanes = <0 1 2 3>;
+			};
 		};
 	};
 };
@@ -497,6 +551,20 @@
 		};
 	};
 
+	edptx_pins_default: edptx-default-pins {
+		pins-cmd-dat {
+			pinmux = <PINMUX_GPIO7__FUNC_EDP_TX_HPD>;
+			bias-pull-up;
+		};
+	};
+
+	dptx_pin: dptx-default-pins {
+		pins-cmd-dat {
+			pinmux = <PINMUX_GPIO18__FUNC_DP_TX_HPD>;
+			bias-pull-up;
+		};
+	};
+
 	i2c0_pins: i2c0-default-pins {
 		pins-bus {
 			pinmux = <PINMUX_GPIO8__FUNC_SDA0>,
-- 
2.18.0