linux-kernel - Re: [PATCH v2 9/9] arm64: dts: qcom: qcs6490-rb3gen2: Enable EUD debug functionality

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Message-ID: <ee0fe165-1764-460f-ad6a-9633b06776b2@oss.qualcomm.com>
Date: Tue, 3 Feb 2026 14:38:28 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Elson Serrao <elson.serrao@....qualcomm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.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>,
        Souradeep Chowdhury <quic_schowdhu@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 9/9] arm64: dts: qcom: qcs6490-rb3gen2: Enable EUD
 debug functionality

On 1/27/26 12:38 AM, Elson Serrao wrote:
> On this board, EUD resides on the primary High-Speed USB data path between
> the connector and the DWC3 controller. Update the device tree connections
> to correctly map the connector and controller endpoints, and describe
> role-switch capability on the EUD primary path.
> 
> Signed-off-by: Elson Serrao <elson.serrao@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 20 ++++++++++++++++++--
>  1 file changed, 18 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index f29a352b0288..2fc2d0aed8dd 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -194,7 +194,7 @@ port@0 {
>  					reg = <0>;
>  
>  					pmic_glink_hs_in: endpoint {
> -						remote-endpoint = <&usb_1_dwc3_hs>;
> +						remote-endpoint = <&eud_con0>;
>  					};
>  				};
>  
> @@ -1176,13 +1176,29 @@ &usb_1 {
>  };
>  
>  &usb_1_dwc3_hs {
> -	remote-endpoint = <&pmic_glink_hs_in>;
> +	remote-endpoint = <&eud_usb0>;
>  };
>  
>  &usb_1_dwc3_ss {
>  	remote-endpoint = <&usb_dp_qmpphy_usb_ss_in>;

The on-SoC links can be deferred to the common DTSI


>  };
>  
> +&eud_con0 {
> +	remote-endpoint = <&pmic_glink_hs_in>;
> +};
> +
> +&eud_usb0 {
> +	remote-endpoint = <&usb_1_dwc3_hs>;
> +};
> +
> +&eud {
> +	status = "okay";

And I think it should be okay to keep it enabled by default

Konrad