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

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Message-ID: <e7aa786d-26aa-4a3d-92bf-7f14dcb79b8c@linaro.org>
Date: Thu, 24 Apr 2025 15:52:13 +0200
From: neil.armstrong@...aro.org
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 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: Jessica Zhang <jesszhan@...cinc.com>, Abhinav Kumar
 <abhinavk@...cinc.com>, Abel Vesa <abel.vesa@...aro.org>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC/WIP 4/4] arm64: dts: qcom: sm8750-mtp: Enable
 DisplayPort over USB

On 24/04/2025 15:04, Krzysztof Kozlowski wrote:
> Hook up DisplayPort parts over Type-C USB on MTP8750.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>   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 c3470e1daa6b7f31196645759be23fb168ce8eb7..69a54ac0f85d5ae20d005a09fbf8da7d769a9c2e 100644
> --- a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts
> @@ -910,6 +910,14 @@ &mdss {
>   	status = "okay";
>   };
>   
> +&mdss_dp0 {
> +	status = "okay";
> +};
> +
> +&mdss_dp0_out {
> +	data-lanes = <0 1>;
> +};
> +
>   &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 753b069cab1de636a3b1108747f300bec0f33980..b20fc5b5bdfab598fc7b9be53eef96cc16bc5985 100644
> --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> @@ -2965,6 +2965,7 @@ port@1 {
>   						reg = <1>;
>   
>   						mdss_dp0_out: endpoint {
> +							remote-endpoint = <&usb_dp_qmpphy_dp_in>;
>   						};
>   					};
>   				};
> @@ -3064,6 +3065,7 @@ port@2 {
>   					reg = <2>;
>   
>   					usb_dp_qmpphy_dp_in: endpoint {
> +						remote-endpoint = <&mdss_dp0_out>;
>   					};
>   				};
>   			};
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>