From: "Jérôme de Bretagne" <jerome.debretagne@gmail.com>
To: Jens Glathe <jens.glathe@oldschoolsolutions.biz>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Aleksandrs Vinarskis <alex.vinarskis@gmail.com>
Subject: Re: [PATCH] dt: arm64: qcom: sc8280xp-blackrock: amend usb0-sbu-mux enable gpio
Date: Sun, 17 May 2026 12:09:31 +0200 [thread overview]
Message-ID: <78d5673f-beb9-40ae-84f1-2cf5224394db@gmail.com> (raw)
In-Reply-To: <25464c46-4576-4411-a7a0-4ad950605ad5@gmail.com>
On 5/17/26 12:03, Jérôme de Bretagne wrote:
> On 6/9/25 22:53, Jens Glathe wrote:
>> The usb0 port didn't switch to dp altmode, investigation into DSDT
>> UCS0 device resulted into GPIO 100.
>>
>> Signed-off-by: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
>
> Tested:by: Jérome de Bretagne <jerome.debretagne@gmail.com>
Sorry for the typo, I meant:
Tested-by: Jérome de Bretagne <jerome.debretagne@gmail.com>
>
> The same issue was impacting the other sc8280xp-based model from
> Microsoft, which is sharing an almost identical board:
>
> 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 (arcata) either.
>
> Switching to GPIO 100 fixed the issue on arcata as well, to finally.
> enable external screen when using the left-side top USB-C port. I
> will send the fix for the Surface Pro 9 5G as part of a series
> fixing various issues and limitations in its initial device tree.
>
> Thank you,
> Jérôme
>
next prev parent reply other threads:[~2026-05-17 10:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-09 20:53 [PATCH] dt: arm64: qcom: sc8280xp-blackrock: amend usb0-sbu-mux enable gpio Jens Glathe via B4 Relay
2026-05-17 10:03 ` Jérôme de Bretagne
2026-05-17 10:09 ` Jérôme de Bretagne [this message]
2026-05-17 11:59 ` Dmitry Baryshkov
2026-05-18 7:50 ` Konrad Dybcio
2026-05-18 8:18 ` Jens Glathe
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