Re: [PATCH] arm64: dts: qcom: qcs6490-rb3gen2: Enable 4-lane DisplayPort Alt Mode

[Neil Armstrong <neil.armstrong@linaro.org>]

On 4/20/26 12:00, Mahadevan P wrote:
> Add the mode-switch property to the QMP combo PHY so that mode-switch
> events are routed to it, allowing the PHY to enter DisplayPort Alternate
> Mode. Expand the DP data-lanes assignment from two to four lanes to make
> use of the full link bandwidth available in this configuration.
> 
> Signed-off-by: Mahadevan P <mahadevan.p@oss.qualcomm.com>
> ---
>   arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index e393ccf1884a..0c180e49816f 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -789,7 +789,7 @@ &mdss_dp {
>   };
>   
>   &mdss_dp_out {
> -	data-lanes = <0 1>;
> +	data-lanes = <0 1 2 3>;

This property should be moved to kodiak.dtsi

>   	remote-endpoint = <&usb_dp_qmpphy_dp_in>;
>   };
>   
> @@ -1391,6 +1391,7 @@ &usb_1_qmpphy {
>   	vdda-phy-supply = <&vreg_l6b_1p2>;
>   	vdda-pll-supply = <&vreg_l1b_0p912>;
>   
> +	mode-switch;
>   	orientation-switch;

Same for those.

Neil

>   
>   	status = "okay";
> 
> ---
> base-commit: 452c3b1ea875276105ac90ba474f72b4cd9b77a2
> change-id: 20260417-kodiak_4k-891ef2221e4b
> 
> Best regards,