From 16065c4ec1e7ca595f4fa363dc2251c6bdf1f6b3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=A9r=C3=B4me=20de=20Bretagne?= Date: Thu, 4 Jun 2026 18:18:40 +0200 Subject: [PATCH] arm64: dts: qcom: sc8280xp-arcata: Fix top USB-C DP alt mode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Fixes: f6231a2eefd4 ("arm64: dts: qcom: sc8280xp: Add Microsoft Surface Pro 9 5G") Reviewed-by: Konrad Dybcio Signed-off-by: Jérôme de Bretagne Link: https://lore.kernel.org/r/20260604-surface-sp9-5g-for-next-v3-4-6aa6f6612c10@gmail.com Signed-off-by: Bjorn Andersson --- 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 a47c4218354d..7cac24d91828 100644 --- a/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts +++ b/arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts @@ -270,7 +270,7 @@ 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>; @@ -1083,7 +1083,7 @@ tx-pins { usb0_sbu_default: usb0-sbu-state { oe-n-pins { - pins = "gpio101"; + pins = "gpio100"; function = "gpio"; bias-disable; drive-strength = <16>;