linux-kernel - [PATCH 4/9] arm64: dts: qcom: x1e80100-asus-vivobook-s15: Add missing pinctrl for eDP HPD

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Message-Id: <20250814-x1e80100-add-edp-hpd-v1-4-a52804db53f6@linaro.org>
Date: Thu, 14 Aug 2025 15:30:31 +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 4/9] arm64: dts: qcom: x1e80100-asus-vivobook-s15: 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: d0e2f8f62dff ("arm64: dts: qcom: Add device tree for ASUS Vivobook S 15")
Signed-off-by: Stephan Gerhold <stephan.gerhold@...aro.org>
---
 arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts b/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts
index 62eba17cdc87c088ca471b4cbf5b44af06400fe4..312d754df18cc71aede13f77b07846ad04d06eaa 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts
+++ b/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts
@@ -593,6 +593,9 @@ &mdss {
 &mdss_dp3 {
 	/delete-property/ #sound-dai-cells;
 
+	pinctrl-0 = <&edp_hpd_default>;
+	pinctrl-names = "default";
+
 	status = "okay";
 
 	aux-bus {
@@ -741,6 +744,12 @@ &tlmm {
 			       <44 4>, /* SPI (TPM) */
 			       <238 1>; /* UFS Reset */
 
+	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