linux-kernel - Re: [PATCH v2 01/10] arm64: dts: qcom: x1e80100: Add pinctrl template for eDP0 HPD

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Message-ID: <kpacd6jtwlf6nklisn4yboc7dp2vxwuo5udmqkyhuovbn6sfzp@o4bldflclwdu>
Date: Fri, 22 Aug 2025 12:40:03 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Stephan Gerhold <stephan.gerhold@...aro.org>
Cc: 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>,
        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>
Subject: Re: [PATCH v2 01/10] arm64: dts: qcom: x1e80100: Add pinctrl
 template for eDP0 HPD

On Fri, Aug 22, 2025 at 11:28:52AM +0200, 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
>  ...
> 
> Add a new &edp0_hpd_default pinctrl template that can be used by boards to
> set up the eDP HPD pin correctly. All boards upstream so far need the same
> configuration; if a board needs a different configuration it can just avoid
> using this template and define a custom one in the board DT.
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/x1e80100.dtsi | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry