linux-kernel - [PATCH v6 4/4] arm64: dts: qcom: x1e80100-t14s: Enable external DisplayPort support

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Message-Id: <20250304-x1e80100-dts-crd-t14s-enable-typec-retimers-v6-4-e5a49fae4e94@linaro.org>
Date: Tue, 04 Mar 2025 12:57:49 +0200
From: Abel Vesa <abel.vesa@...aro.org>
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: Johan Hovold <johan@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 Rajendra Nayak <quic_rjendra@...cinc.com>, 
 Sibi Sankar <quic_sibis@...cinc.com>, 
 Christophe JAILLET <christophe.jaillet@...adoo.fr>, 
 Trilok Soni <quic_tsoni@...cinc.com>, linux-arm-msm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Abel Vesa <abel.vesa@...aro.org>, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>, 
 Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH v6 4/4] arm64: dts: qcom: x1e80100-t14s: Enable external
 DisplayPort support

The Lenovo ThinkPad T14s Gen6 provides external DisplayPort on all
2 USB Type-C ports. Each one of this ports is connected to a dedicated
DisplayPort controller.

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

So enable the first and second DisplayPort controllers and limit their
data lanes number to 2.

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Reviewed-by: Johan Hovold <johan+linaro@...nel.org>
Tested-by: Johan Hovold <johan+linaro@...nel.org>
Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
 .../boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts      | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
index 9c0903b8436396b2fe6e17ee3bc4d454cb5a0f8b..05b2f3bf1fc81c1b10e375b5335377c9ce39be95 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
@@ -923,6 +923,22 @@ &mdss {
 	status = "okay";
 };
 
+&mdss_dp0 {
+	status = "okay";
+};
+
+&mdss_dp0_out {
+	data-lanes = <0 1>;
+};
+
+&mdss_dp1 {
+	status = "okay";
+};
+
+&mdss_dp1_out {
+	data-lanes = <0 1>;
+};
+
 &mdss_dp3 {
 	compatible = "qcom,x1e80100-dp";
 	/delete-property/ #sound-dai-cells;

-- 
2.34.1