linux-kernel - [PATCH v3 7/9] arm64: dts: qcom: sm8550: Set up 4-lane DP

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Message-Id: <20250822-topic-x1e80100-4lanes-v3-7-5363acad9e32@linaro.org>
Date: Fri, 22 Aug 2025 17:56:55 +0200
From: Neil Armstrong <neil.armstrong@...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: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v3 7/9] arm64: dts: qcom: sm8550: Set up 4-lane DP

Allow up to 4 lanes for the DisplayPort link from the PHY to the
controller now the mode-switch events can reach the QMP Combo PHY.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 arch/arm64/boot/dts/qcom/sm8550.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
index 277820491e8e96ce282579daef5287f6327ecbbf..52055354adfa69d39e0fc5cc9d9198dc8374e1e9 100644
--- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
@@ -3791,7 +3791,7 @@ mdss_dp0_in: endpoint {
 					port@1 {
 						reg = <1>;
 						mdss_dp0_out: endpoint {
-							data-lanes = <0 1>;
+							data-lanes = <0 1 2 3>;
 							remote-endpoint = <&usb_dp_qmpphy_dp_in>;
 						};
 					};

-- 
2.34.1