[PATCH 05/11] arm64: dts: qcom: sc8280xp-arcata: Fix top USB-C DP alt mode

[Jérôme de Bretagne via B4 Relay <devnull+jerome.debretagne.gmail.com@kernel.org>]

From: Jérôme de Bretagne <jerome.debretagne@gmail.com>

The top USB-C port (usb0) didn't switch to DP alt mode, as reusing the
same GPIO 101 as on the SC8280XP CRD or Lenovo ThinkPad X13s was not
working on the Surface Pro 9 5G.

Investigation [1] by Jens on the Windows Dev Kit (WDK2023), the other
sc8280xp-based "blackrock" model from Microsoft, found a reference
to GPIO 100 in the DSDT in addition to 101. Switching to GPIO 100
fixed the issue on blackrock, as it does on arcata to enable
external screen when using the left-side top USB-C port.

[1] https://lore.kernel.org/all/20250609-blackrock-usb0-mux-v1-1-7903c3b071e4@oldschoolsolutions.biz/

Cc: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
Signed-off-by: Jérôme de Bretagne <jerome.debretagne@gmail.com>
Fixes: f6231a2eefd4 ("arm64: dts: qcom: sc8280xp: Add Microsoft Surface Pro 9 5G")
---
 arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts b/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts
index 49c0ecfc6c055ef2cd85db022d9340ecb88b7fc4..50fabf8961fd9869a31f24a69da854348fc1d891 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts
@@ -287,7 +287,7 @@ map1 {
 	usb0-sbu-mux {
 		compatible = "pericom,pi3usb102", "gpio-sbu-mux";
 
-		enable-gpios = <&tlmm 101 GPIO_ACTIVE_LOW>;
+		enable-gpios = <&tlmm 100 GPIO_ACTIVE_LOW>;
 		select-gpios = <&tlmm 164 GPIO_ACTIVE_HIGH>;
 
 		pinctrl-0 = <&usb0_sbu_default>;
@@ -1101,7 +1101,7 @@ tx-pins {
 
 	usb0_sbu_default: usb0-sbu-state {
 		oe-n-pins {
-			pins = "gpio101";
+			pins = "gpio100";
 			function = "gpio";
 			bias-disable;
 			drive-strength = <16>;

-- 
2.47.3