linux-kernel - Re: [PATCH v4 3/3] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: add HDMI nodes

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Message-ID: <38416f73-9570-4f01-b179-cb653a874b69@oss.qualcomm.com>
Date: Mon, 6 Oct 2025 12:25:02 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, Vinod Koul
 <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        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>
Cc: Xilin Wu <sophon@...xa.com>, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/3] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s:
 add HDMI nodes

On 9/30/25 9:39 AM, Neil Armstrong wrote:
> The Thinkpad T14s embeds a transparent 4lanes DP->HDMI transceiver
> connected to the third QMP Combo PHY 4 lanes.
> 
> Add all the data routing, disable mode switching and specify the
> QMP Combo PHY should be in DP-Only mode to route the 4 lanes to
> the underlying DP phy.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---

[...]

> +&usb_1_ss2_qmpphy {
> +	vdda-phy-supply = <&vreg_l2j_1p2>;
> +	vdda-pll-supply = <&vreg_l2d_0p9>;
> +
> +	/delete-property/ mode-switch;
> +	/delete-property/ orientation-switch;
> +
> +	status = "okay";
> +
> +	ports {
> +		port@0 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			/delete-node/ endpoint;
> +
> +			usb_1_ss2_qmpphy_out_dp: endpoint@0 {
> +				reg = <0>;
> +
> +				data-lanes = <3 2 1 0>;
> +				remote-endpoint = <&hdmi_bridge_dp_in>;
> +			};
> +
> +			/* No USB3 lanes connected */
> +		};
> +	};
> +};
> +
>  &usb_1_ss1_hsphy {

You have to move your _ss*2*_ node below the _ss*1*_ nodes

otherwise:

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad