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[2a01:cb08:52d:7400:bbd7:ca83:de4a:f625]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45da0a178adsm30260076f8f.18.2026.05.17.03.09.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 17 May 2026 03:09:31 -0700 (PDT) Message-ID: <78d5673f-beb9-40ae-84f1-2cf5224394db@gmail.com> Date: Sun, 17 May 2026 12:09:31 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] dt: arm64: qcom: sc8280xp-blackrock: amend usb0-sbu-mux enable gpio From: =?UTF-8?Q?J=C3=A9r=C3=B4me_de_Bretagne?= To: Jens Glathe , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Aleksandrs Vinarskis References: <20250609-blackrock-usb0-mux-v1-1-7903c3b071e4@oldschoolsolutions.biz> <25464c46-4576-4411-a7a0-4ad950605ad5@gmail.com> Content-Language: en-US In-Reply-To: <25464c46-4576-4411-a7a0-4ad950605ad5@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 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 > > Tested:by: Jérome de Bretagne Sorry for the typo, I meant: Tested-by: Jérome de Bretagne > > 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 >