arm64: mediatek: mt8195-cherry: Add graph for eDP and DP displays

The base SoC devicetree now defines a display controller graph:
connect the board specific outputs (eDP internal display, DP
external display) to fully migrate Cherry and make it finally
possible to make Chromebooks and other board types to coexist
without per-board driver modifications.

Link: https://lore.kernel.org/r/20250213112008.56394-3-angelogioacchino.delregno@collabora.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

1 files changed, 177 insertions, 7 deletions

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 5056e07399e2..e70599807bb1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -297,12 +297,29 @@
 	cpu-supply = <&mt6315_6_vbuck1>;
 };
 
+&dither0_out {
+	remote-endpoint = <&dsc0_in>;
+};
+
 &dp_intf0 {
 	status = "okay";
 
-	port {
-		dp_intf0_out: endpoint {
-			remote-endpoint = <&edp_in>;
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			dp_intf0_in: endpoint {
+				remote-endpoint = <&merge0_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			dp_intf0_out: endpoint {
+				remote-endpoint = <&edp_in>;
+			};
 		};
 	};
 };
@@ -310,9 +327,51 @@
 &dp_intf1 {
 	status = "okay";
 
-	port {
-		dp_intf1_out: endpoint {
-			remote-endpoint = <&dptx_in>;
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			dp_intf1_in: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&merge5_out>;
+			};
+		};
+
+		port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			dp_intf1_out: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&dptx_in>;
+			};
+		};
+	};
+};
+
+&dsc0 {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			dsc0_in: endpoint {
+				remote-endpoint = <&dither0_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			dsc0_out: endpoint {
+				remote-endpoint = <&merge0_in>;
+			};
 		};
 	};
 };
@@ -357,6 +416,35 @@
 	};
 };
 
+&ethdr0 {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			ethdr0_in: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&vdosys1_ep_ext>;
+			};
+		};
+
+		port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			ethdr0_out: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&merge5_in>;
+			};
+		};
+	};
+};
+
 &disp_pwm0 {
 	status = "okay";
 
@@ -376,8 +464,12 @@
 		#size-cells = <0>;
 
 		port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
 			reg = <0>;
-			dptx_in: endpoint {
+
+			dptx_in: endpoint@1 {
+				reg = <1>;
 				remote-endpoint = <&dp_intf1_out>;
 			};
 		};
@@ -511,6 +603,56 @@
 	};
 };
 
+&merge0 {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			merge0_in: endpoint {
+				remote-endpoint = <&dsc0_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			merge0_out: endpoint {
+				remote-endpoint = <&dp_intf0_in>;
+			};
+		};
+	};
+};
+
+&merge5 {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			merge5_in: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&ethdr0_out>;
+			};
+		};
+
+		port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			merge5_out: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&dp_intf1_in>;
+			};
+		};
+	};
+};
+
 &mfg0 {
 	domain-supply = <&mt6315_7_vbuck1>;
 };
@@ -612,6 +754,10 @@
 	};
 };
 
+&ovl0_in {
+	remote-endpoint = <&vdosys0_ep_main>;
+};
+
 &pcie1 {
 	status = "okay";
 
@@ -1363,6 +1509,18 @@
 	status = "okay";
 };
 
+&vdosys0 {
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		vdosys0_ep_main: endpoint@0 {
+			reg = <0>;
+			remote-endpoint = <&ovl0_in>;
+		};
+	};
+};
+
 /*
  * For the USB Type-C ports the role and alternate modes switching is
  * done by the EC so we set dr_mode to host to avoid interfering.
@@ -1385,6 +1543,18 @@
 	status = "okay";
 };
 
+&vdosys1 {
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		vdosys1_ep_ext: endpoint@1 {
+			reg = <1>;
+			remote-endpoint = <&ethdr0_in>;
+		};
+	};
+};
+
 &xhci0 {
 	status = "okay";