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

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Message-Id: <20250814-x1e80100-add-edp-hpd-v1-5-a52804db53f6@linaro.org>
Date: Thu, 14 Aug 2025 15:30:32 +0200
From: Stephan Gerhold <stephan.gerhold@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: 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>, 
 Christopher Obbard <christopher.obbard@...aro.org>
Subject: [PATCH 5/9] arm64: dts: qcom: x1e80100-dell-xps13-9345: Add
 missing pinctrl for eDP HPD

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>
---
 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