linux-kernel - [PATCH v3 4/4] arm64: dts: qcom: sm8750-mtp: Enable DisplayPort over USB

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Message-Id: <20251216-sm8750-display-dts-v3-4-3889ace2ff0b@oss.qualcomm.com>
Date: Tue, 16 Dec 2025 17:47:34 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.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,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
Subject: [PATCH v3 4/4] arm64: dts: qcom: sm8750-mtp: Enable DisplayPort
 over USB

Hook up DisplayPort parts over Type-C USB on MTP8750.

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sm8750-mtp.dts | 8 ++++++++
 arch/arm64/boot/dts/qcom/sm8750.dtsi    | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
index a08bedd2987e..383bce57ec62 100644
--- a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
+++ b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
@@ -983,6 +983,14 @@ &mdss {
 	status = "okay";
 };
 
+&mdss_dp0 {
+	status = "okay";
+};
+
+&mdss_dp0_out {
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
 &mdss_dsi0 {
 	vdda-supply = <&vreg_l3g_1p2>;
 
diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
index 11194b34e6dc..6584e324a163 100644
--- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
@@ -2648,6 +2648,7 @@ port@2 {
 					reg = <2>;
 
 					usb_dp_qmpphy_dp_in: endpoint {
+						remote-endpoint = <&mdss_dp0_out>;
 					};
 				};
 			};
@@ -3142,6 +3143,7 @@ port@1 {
 
 						mdss_dp0_out: endpoint {
 							data-lanes = <0 1 2 3>;
+							remote-endpoint = <&usb_dp_qmpphy_dp_in>;
 						};
 					};
 				};

-- 
2.51.0