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

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Message-ID: <7277bc17-112b-4fc9-9099-243d216893d8@oss.qualcomm.com>
Date: Tue, 14 Oct 2025 19:25:45 +0800
From: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....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 10/14/2025 6:21 PM, Dmitry Baryshkov wrote:
> 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.


Yes, on this platform the DP HPD signal is controlled by the pin controller
on the video-out sub-board, not by the TLMM on the SoC.


>> +
>> +		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.


Ok.


>> +	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
>>
>>