linux-kernel - [PATCH v1 1/4] arm64: dts: qcom: x1e80100-dell-xps13-9345: Enable external DP support

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Message-ID: <20250226231436.16138-2-alex.vinarskis@gmail.com>
Date: Thu, 27 Feb 2025 00:12:09 +0100
From: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
To: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	laurentiu.tudor1@...l.com,
	abel.vesa@...aro.org,
	Aleksandrs Vinarskis <alex.vinarskis@...il.com>
Subject: [PATCH v1 1/4] arm64: dts: qcom: x1e80100-dell-xps13-9345: Enable external DP support

Particular laptops comes with two USB Type-C ports, both supporting DP
alt mode. Enable output on both of them. Explicitly list supported
frequencies including HBR3/8.1Gbps for all external DisplayPort(s).

Due to support missing in the USB/DisplayPort combo PHY driver,
the external DisplayPort is limited to 2 lanes.

Derived from:
arm64: dts: qcom: x1e80100-t14s: Add external DP support

Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
---
 .../boot/dts/qcom/x1e80100-dell-xps13-9345.dts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts b/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts
index 86e87f03b0ec..124051334be0 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts
+++ b/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts
@@ -770,6 +770,24 @@ &mdss {
 	status = "okay";
 };
 
+&mdss_dp0 {
+	status = "okay";
+};
+
+&mdss_dp0_out {
+	data-lanes = <0 1>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
+&mdss_dp1 {
+	status = "okay";
+};
+
+&mdss_dp1_out {
+	data-lanes = <0 1>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
 &mdss_dp3 {
 	/delete-property/ #sound-dai-cells;
 
-- 
2.45.2