linux-kernel - Re: [PATCH v2 04/10] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: Add missing pinctrl for eDP HPD

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Message-ID: <cae41451-39ca-4538-a74c-39701d30073f@linaro.org>
Date: Fri, 22 Aug 2025 11:35:58 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Stephan Gerhold <stephan.gerhold@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Aleksandrs Vinarskis <alex.vinarskis@...il.com>,
 Abel Vesa <abel.vesa@...aro.org>, Xilin Wu <wuxilin123@...il.com>,
 Jens Glathe <jens.glathe@...schoolsolutions.biz>,
 Srinivas Kandagatla <srini@...nel.org>, Sibi Sankar
 <quic_sibis@...cinc.com>, Rajendra Nayak <quic_rjendra@...cinc.com>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org>,
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
 Christopher Obbard <christopher.obbard@...aro.org>
Subject: Re: [PATCH v2 04/10] arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s:
 Add missing pinctrl for eDP HPD

On 22/08/2025 11:28, Stephan Gerhold wrote:
> At the moment, we indirectly rely on the boot firmware to set up the
> pinctrl for the eDP HPD line coming from the internal display. If the boot
> firmware does not configure the display (e.g. because a different display
> is selected for output in the UEFI settings), then the display fails to
> come up and there are several errors in the kernel log:
> 
>   [drm:dpu_encoder_phys_vid_wait_for_commit_done:544] [dpu error]vblank timeout: 80020041
>   [drm:dpu_kms_wait_for_commit_done:524] [dpu error]wait for commit done returned -110
>   [drm:dpu_encoder_frame_done_timeout:2715] [dpu error]enc40 frame done timeout
>   ...
> 
> Fix this by adding the missing pinctrl for gpio119 (func1/edp0_hot and
> bias-disable according to the ACPI DSDT), which is defined as
> &edp0_hpd_default template in x1e80100.dtsi.
> 
> Fixes: 7d1cbe2f4985 ("arm64: dts: qcom: Add X1E78100 ThinkPad T14s Gen 6")
> Tested-by: Christopher Obbard <christopher.obbard@...aro.org>
> Reviewed-by: Christopher Obbard <christopher.obbard@...aro.org>
> Signed-off-by: Stephan Gerhold <stephan.gerhold@...aro.org>
> ---
>   arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
> index 4cf61c2a34e31233b1adc93332bcabef22de3f86..76d491f085db2eb6ba8c8358063882611446ae72 100644
> --- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
> +++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
> @@ -1010,6 +1010,9 @@ &mdss_dp1_out {
>   &mdss_dp3 {
>   	/delete-property/ #sound-dai-cells;
>   
> +	pinctrl-0 = <&edp0_hpd_default>;
> +	pinctrl-names = "default";
> +
>   	status = "okay";
>   
>   	aux-bus {
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on Lenovo Thinkpad T14s OLED