linux-kernel - [PATCH] arm64: dts: qcom: x1-asus-zenbook-a14: add HDMI port

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Message-Id: <20260211-zenbook-a14-improvements-v1-1-d970af6e25a3@vinarskis.com>
Date: Wed, 11 Feb 2026 01:16:25 +0100
From: Aleksandrs Vinarskis <alex@...arskis.com>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: qcom: x1-asus-zenbook-a14: add HDMI port

Add HDMI port that utilizes qmpphy via Parade PS185HDM DP-HDMI
bridge.

Based on commit 34d76723c410 ("arm64: dts: qcom: x1e80100-vivobook-s15:
add HDMI port")

Signed-off-by: Aleksandrs Vinarskis <alex@...arskis.com>
---
Successfully tested with 3440x1440@...hz, both hotplug and coldplug.
---
 arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi | 79 +++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi b/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi
index 8e5c5575a5320172caa628db181560f55b688e67..d441f860fbed26df91e336ae7c0a3fb8406c6446 100644
--- a/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi
@@ -63,6 +63,45 @@ switch-lid {
 		};
 	};
 
+	hdmi-bridge {
+		compatible = "parade,ps185hdm";
+
+		pinctrl-0 = <&hdmi_hpd_default>;
+		pinctrl-names = "default";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				hdmi_bridge_dp_in: endpoint {
+					remote-endpoint = <&usb_1_ss2_qmpphy_out_dp>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				hdmi_bridge_tmds_out: endpoint {
+					remote-endpoint = <&hdmi_con>;
+				};
+			};
+		};
+	};
+
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_con: endpoint {
+				remote-endpoint = <&hdmi_bridge_tmds_out>;
+			};
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -995,6 +1034,14 @@ &mdss_dp1_out {
 	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
 };
 
+&mdss_dp2 {
+	status = "okay";
+};
+
+&mdss_dp2_out {
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
 &mdss_dp3 {
 	/delete-property/ #sound-dai-cells;
 
@@ -1253,6 +1300,12 @@ hall_int_n_default: hall-int-n-state {
 		bias-disable;
 	};
 
+	hdmi_hpd_default: hdmi-hpd-default-state {
+		pins = "gpio126";
+		function = "usb2_dp";
+		bias-disable;
+	};
+
 	hdtl_default: hdtl-default-state {
 		pins = "gpio95";
 		function = "gpio";
@@ -1451,6 +1504,32 @@ &usb_1_ss1_qmpphy_out {
 	remote-endpoint = <&retimer_ss1_ss_in>;
 };
 
+&usb_1_ss2_qmpphy {
+	vdda-phy-supply = <&vreg_l2j_1p2>;
+	vdda-pll-supply = <&vreg_l2d_0p9>;
+
+	/delete-property/ mode-switch;
+	/delete-property/ orientation-switch;
+
+	status = "okay";
+
+	ports {
+		port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			/delete-node/ endpoint;
+
+			usb_1_ss2_qmpphy_out_dp: endpoint@0 {
+				reg = <0>;
+
+				data-lanes = <3 2 1 0>;
+				remote-endpoint = <&hdmi_bridge_dp_in>;
+			};
+		};
+	};
+};
+
 &usb_mp {
 	status = "okay";
 };

---
base-commit: 159c55202f6ec8f0fafca984ba6b0bd5751acddf
change-id: 20260201-zenbook-a14-improvements-b8c29352dd8c

Best regards,
-- 
Aleksandrs Vinarskis <alex@...arskis.com>