linux-kernel - [PATCH v1 2/2] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: Enable HBR3 on external DPs

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Message-ID: <20250630205514.14022-3-alex.vinarskis@gmail.com>
Date: Mon, 30 Jun 2025 22:54:11 +0200
From: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
To: Bjorn Andersson <andersson@...nel.org>,
	Johan Hovold <johan+linaro@...nel.org>,
	linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Aleksandrs Vinarskis <alex.vinarskis@...il.com>
Subject: [PATCH v1 2/2] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: Enable HBR3 on external DPs

When no link frequencies are set, msm/dp driver defaults to HBR2 speed.
Explicitly list supported frequencies including HBR3/8.1Gbps for all
external DisplayPort(s).

Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
---
 arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
index ac1dddf27da3..2308d5a0e3af 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
@@ -995,6 +995,7 @@ &mdss_dp0 {
 
 &mdss_dp0_out {
 	data-lanes = <0 1>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
 };
 
 &mdss_dp1 {
@@ -1003,6 +1004,7 @@ &mdss_dp1 {
 
 &mdss_dp1_out {
 	data-lanes = <0 1>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
 };
 
 &mdss_dp3 {
-- 
2.48.1