linux-kernel - Re: [PATCH v2 3/3] arm64: dts: qcom: Enable DisplayPort on QCS615 Ride platform

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Message-ID: <kxwavurs7ebp5f22gxutvw4thwm24twqpahszhyxsodsikunja@7hl3y65ppqmo>
Date: Tue, 14 Oct 2025 13:21:51 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: xiangxu.yin@....qualcomm.com
Cc: Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        fange.zhang@....qualcomm.com, yongxing.mou@....qualcomm.com,
        li.liu@....qualcomm.com
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: Enable DisplayPort on QCS615
 Ride platform

On Tue, Oct 14, 2025 at 05:42:12PM +0800, Xiangxu Yin via B4 Relay wrote:
> From: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
> 
> Add DP connector node and configure MDSS DisplayPort controller for
> QCS615 Ride platform. Include lane mapping and PHY supply settings
> to support DP output.
> 
> Signed-off-by: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/qcs615-ride.dts | 31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs615-ride.dts b/arch/arm64/boot/dts/qcom/qcs615-ride.dts
> index 9ac1dd3483b56f9d1652f8a38f62d759efa92b6a..0b8bcabdd90a0820b1f9c85e43b78e40eb8a9a38 100644
> --- a/arch/arm64/boot/dts/qcom/qcs615-ride.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs615-ride.dts
> @@ -39,6 +39,20 @@ xo_board_clk: xo-board-clk {
>  		};
>  	};
>  
> +	dp0-connector {
> +		compatible = "dp-connector";
> +		label = "DP0";
> +		type = "mini";
> +
> +		hpd-gpios = <&io_expander 8 GPIO_ACTIVE_HIGH>;

Not the gpio102/ 103 / 104? Interesting.

> +
> +		port {
> +			dp0_connector_in: endpoint {
> +				remote-endpoint = <&mdss_dp0_out>;
> +			};
> +		};
> +	};
> +
>  	dp-dsi0-connector {
>  		compatible = "dp-connector";
>  		label = "DSI0";
> @@ -423,6 +437,16 @@ &mdss {
>  	status = "okay";
>  };
>  
> +&mdss_dp0 {
> +	status = "okay";
> +};
> +
> +&mdss_dp0_out {
> +	data-lanes = <3 2 0 1>;

It's not a board peculiarity. All QCS615 / SM6150 devices are affected
by this twist. Please move this to the SoC DT file.

> +	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000>;
> +	remote-endpoint = <&dp0_connector_in>;
> +};
> +
>  &mdss_dsi0 {
>  	vdda-supply = <&vreg_l11a>;
>  	status = "okay";
> @@ -623,6 +647,13 @@ &usb_qmpphy {
>  	status = "okay";
>  };
>  
> +&usb_qmpphy_2 {
> +	vdda-phy-supply = <&vreg_l5a>;
> +	vdda-pll-supply = <&vreg_l12a>;
> +
> +	status = "okay";
> +};
> +
>  &usb_1 {
>  	status = "okay";
>  };
> 
> -- 
> 2.34.1
> 
> 

-- 
With best wishes
Dmitry