linux-kernel - Re: [PATCH 5/9] arm64: dts: qcom: x1e80100-dell-xps13-9345: Add missing pinctrl for eDP HPD

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Message-ID: <CAMcHhXr2ayhVAS8gwxj2+ixq2GhSPBPdxB3swOUisstHGxufYQ@mail.gmail.com>
Date: Fri, 15 Aug 2025 11:24:47 +0200
From: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
To: Stephan Gerhold <stephan.gerhold@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>, 
	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>, 
	Christopher Obbard <christopher.obbard@...aro.org>
Subject: Re: [PATCH 5/9] arm64: dts: qcom: x1e80100-dell-xps13-9345: Add
 missing pinctrl for eDP HPD

On Thu, 14 Aug 2025 at 15:30, Stephan Gerhold
<stephan.gerhold@...aro.org> 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).
>
> Fixes: f5b788d0e8cd ("arm64: dts: qcom: Add support for X1-based Dell XPS 13 9345")
> Signed-off-by: Stephan Gerhold <stephan.gerhold@...aro.org>

Tested-by: Aleksandrs Vinarskis <alex.vinarskis@...il.com>    # 3K OLED
Reviewed-by: Aleksandrs Vinarskis <alex.vinarskis@...il.com>

> ---
>  arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts b/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts
> index 6b27067f0be66b5c41fa681ff3b4f535100bdf59..6cb98197eb9c0d6e171741aa83e7f4ff77e911c9 100644
> --- a/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts
> +++ b/arch/arm64/boot/dts/qcom/x1e80100-dell-xps13-9345.dts
> @@ -900,6 +900,9 @@ &mdss_dp1_out {
>  &mdss_dp3 {
>         /delete-property/ #sound-dai-cells;
>
> +       pinctrl-0 = <&edp_hpd_default>;
> +       pinctrl-names = "default";
> +
>         status = "okay";
>
>         aux-bus {
> @@ -1080,6 +1083,12 @@ edp_bl_en: edp-bl-en-state {
>                 bias-disable;
>         };
>
> +       edp_hpd_default: edp-hpd-default-state {
> +               pins = "gpio119";
> +               function = "edp0_hot";
> +               bias-disable;
> +       };
> +
>         edp_reg_en: edp-reg-en-state {
>                 pins = "gpio70";
>                 function = "gpio";
>
> --
> 2.50.1
>