linux-kernel - [PATCH 1/9] arm64: dts: qcom: x1-asus-zenbook-a14: Add missing pinctrl for eDP HPD

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Message-Id: <20250814-x1e80100-add-edp-hpd-v1-1-a52804db53f6@linaro.org>
Date: Thu, 14 Aug 2025 15:30:28 +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 1/9] arm64: dts: qcom: x1-asus-zenbook-a14: 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: 6516961352a1 ("arm64: dts: qcom: Add support for X1-based Asus Zenbook A14")
Signed-off-by: Stephan Gerhold <stephan.gerhold@...aro.org>
---
 arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi b/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi
index 16d045cf64c08c02c420787e000f4f45cfc2c6ff..613c675aac296f931293a1ba3d8506c6663bad21 100644
--- a/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1-asus-zenbook-a14.dtsi
@@ -1001,6 +1001,9 @@ &mdss_dp1_out {
 &mdss_dp3 {
 	/delete-property/ #sound-dai-cells;
 
+	pinctrl-0 = <&edp_hpd_default>;
+	pinctrl-names = "default";
+
 	status = "okay";
 
 	aux-bus {
@@ -1236,6 +1239,12 @@ cam_indicator_en: cam-indicator-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