Re: [PATCH RFC] arm64: dts: qcom: mahua-lenovo-thinkpad-t14s-gen7: Describe the HDMI port

[Konrad Dybcio]

On 11/9/26 10:06 AM, Abel Vesa wrote:
> The HDMI port is driven by the third DisplayPort controller through the
> DP lanes of the third USB/DP combo PHY and a Realtek RTD2171A DP to HDMI
> bridge, with the HPD signal on GPIO 126. The USB3 lanes of this PHY are
> not connected, the third USB controller only serves the eUSB2 port of
> the fingerprint reader.
> 
> Describe all of this so the HDMI port works.
> 
> Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxxxxxxxx>
> ---
> This depends on the LDO voltage fix sent separately, as the combo PHY is
> powered from one of the rails it fixes:
> 
> https://patch.msgid.link/20261108-t14s-gen7-ldo-voltages-v1-1-e0ad0d528767@xxxxxxxxxxxxxxxx
> 
> Tested on a ThinkPad T14s Gen 7 (LCD) with a 1920x1080 monitor: the DP
> link to the bridge trains at HBR2 x4 and the monitor shows the desktop.
> ---

[...]


>  
> +	hdmi_hpd_default: hdmi-hpd-default-state {
> +		pins = "gpio126";
> +		function = "usb2_dp";
> +		bias-disable;
> +	};

nit: order

otherwise whichever way we end up merging the dependency

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

Konrad