linux-kernel - [PATCH 10/12] arm64: dts: mediatek: mt8395-genio-common: Enable HDMI output

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Message-Id: <20251209-mtk-genio-evk-hdmi-support-v1-10-9a6106effba6@collabora.com>
Date: Tue, 09 Dec 2025 17:34:40 +0100
From: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
To: Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Chun-Kuang Hu <chunkuang.hu@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Guillaume Ranquet <granquet@...libre.com>
Cc: kernel@...labora.com, Krzysztof Kozlowski <krzk@...nel.org>, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 linux-phy@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
Subject: [PATCH 10/12] arm64: dts: mediatek: mt8395-genio-common: Enable
 HDMI output

Add a definition for the on-board HDMI connector, enable and add
the relevant configuration for the HDMI PHY and controller, and
define the pins used by those.

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
---
 .../boot/dts/mediatek/mt8395-genio-common.dtsi     | 142 +++++++++++++++++++++
 1 file changed, 142 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8395-genio-common.dtsi b/arch/arm64/boot/dts/mediatek/mt8395-genio-common.dtsi
index 2b7167804e71d0ced33c048ecb2040667b5fece1..345fc5ac9e039de8660ae325f36ae6265ef3a7c8 100644
--- a/arch/arm64/boot/dts/mediatek/mt8395-genio-common.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8395-genio-common.dtsi
@@ -26,6 +26,20 @@ chosen {
 		stdout-path = "serial0:921600n8";
 	};
 
+	connector {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+		ddc-i2c-bus = <&hdmitx_ddc>;
+		hdmi-pwr-supply = <&hdmi_phy>;
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&hdmi0_out>;
+			};
+		};
+	};
+
 	firmware {
 		optee {
 			compatible = "linaro,optee-tz";
@@ -247,6 +261,18 @@ &dmic_codec {
 	wakeup-delay-ms = <200>;
 };
 
+&dpi1 {
+	status = "okay";
+};
+
+&dpi1_in {
+	remote-endpoint = <&merge5_out>;
+};
+
+&dpi1_out {
+	remote-endpoint = <&hdmi0_in>;
+};
+
 &dsi0 {
 	#address-cells = <1>;
 	#size-cells = <0>;
@@ -313,6 +339,35 @@ eth_phy0: ethernet-phy@1 {
 	};
 };
 
+&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>;
+			};
+		};
+	};
+};
+
 &gamma0_out {
 	remote-endpoint = <&dither0_in>;
 };
@@ -329,6 +384,27 @@ &i2c0 {
 	status = "okay";
 };
 
+&hdmi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&hdmi_pins>;
+	status = "okay";
+};
+
+&hdmi0_in {
+	remote-endpoint = <&dpi1_out>;
+};
+
+&hdmi0_out {
+	remote-endpoint = <&hdmi_connector_in>;
+};
+
+&hdmi_phy {
+	pinctrl-names = "default";
+	pinctrl-0 = <&hdmi_vreg_pins>;
+
+	status = "okay";
+};
+
 &i2c1 {
 	clock-frequency = <400000>;
 	pinctrl-0 = <&i2c1_pins>;
@@ -533,6 +609,35 @@ mt6360_ssusb_sbu_ep: endpoint {
 	};
 };
 
+&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 = <&dpi1_in>;
+			};
+		};
+	};
+};
+
 &mfg0 {
 	domain-supply = <&mt6315_7_vbuck1>;
 };
@@ -762,6 +867,31 @@ pins {
 		};
 	};
 
+	hdmi_vreg_pins: hdmi-vreg-pins {
+		pins-pwr {
+			pinmux = <PINMUX_GPIO31__FUNC_HDMITX20_PWR5V>;
+			bias-disable;
+		};
+	};
+
+	hdmi_pins: hdmi-pins {
+		pins-hotplug {
+			pinmux = <PINMUX_GPIO32__FUNC_HDMITX20_HTPLG>;
+			bias-pull-down;
+		};
+
+		pins-ddc {
+			pinmux = <PINMUX_GPIO34__FUNC_HDMITX20_SCL>,
+				 <PINMUX_GPIO35__FUNC_HDMITX20_SDA>;
+			drive-strength = <10>;
+		};
+
+		pins-cec {
+			pinmux = <PINMUX_GPIO33__FUNC_HDMITX20_CEC>;
+			bias-disable;
+		};
+	};
+
 	i2c0_pins: i2c0-pins {
 		pins {
 			pinmux = <PINMUX_GPIO8__FUNC_SDA0>,
@@ -1212,6 +1342,18 @@ vdosys0_ep_main: endpoint@0 {
 	};
 };
 
+&vdosys1 {
+	port {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		vdosys1_ep_ext: endpoint@1 {
+			reg = <1>;
+			remote-endpoint = <&ethdr0_in>;
+		};
+	};
+};
+
 &xhci0 {
 	status = "okay";
 };

-- 
2.52.0