linux-kernel - [PATCH v4 1/2] arm64: dts: qcom: x1e78100-t14s: add hpd gpio to dp controller

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Message-Id: <20250402-wip-obbardc-qcom-t14s-oled-panel-v4-1-41ba3f3739d0@linaro.org>
Date: Wed, 02 Apr 2025 10:58:32 +0100
From: Christopher Obbard <christopher.obbard@...aro.org>
To: Douglas Anderson <dianders@...omium.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, Johan Hovold <johan@...nel.org>, 
 Rui Miguel Silva <rui.silva@...aro.org>, Abel Vesa <abel.vesa@...aro.org>, 
 devicetree@...r.kernel.org, 
 Christopher Obbard <christopher.obbard@...aro.org>
Subject: [PATCH v4 1/2] arm64: dts: qcom: x1e78100-t14s: add hpd gpio to dp
 controller

The eDP controller has an HPD GPIO. Describe it in the device tree
for the generic T14s model, as the HPD GPIO is used in both the
OLED and LCD models which inherit this device tree.

Signed-off-by: Christopher Obbard <christopher.obbard@...aro.org>
---
 arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
index 962fb050c55c4fd33f480a21a8c47a484d0c82b8..b0dbe4eaa77e5a6f862fd0db2a3c91db2aab5030 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
@@ -975,6 +975,9 @@ &mdss_dp3 {
 	compatible = "qcom,x1e80100-dp";
 	/delete-property/ #sound-dai-cells;
 
+	pinctrl-names = "default";
+	pinctrl-0 = <&edp_hpd_active>;
+
 	status = "okay";
 
 	aux-bus {
@@ -1215,6 +1218,11 @@ &tlmm {
 			       <72 2>, /* Secure EC I2C connection (?) */
 			       <238 1>; /* UFS Reset */
 
+	edp_hpd_active: edp-hpd-active-state {
+		pins = "gpio119";
+		function = "edp_hot";
+	};
+
 	eusb3_reset_n: eusb3-reset-n-state {
 		pins = "gpio6";
 		function = "gpio";

-- 
2.49.0