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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6882442b03fsm572015a12.12.2026.05.21.01.53.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 May 2026 01:53:13 -0700 (PDT) Message-ID: <990a0d6b-ef5c-4d7b-ab63-e75c37825397@oss.qualcomm.com> Date: Thu, 21 May 2026 10:53:10 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 05/11] arm64: dts: qcom: sc8280xp-arcata: Fix top USB-C DP alt mode To: jerome.debretagne@gmail.com, Douglas Anderson , Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Krzysztof Kozlowski , Jens Glathe References: <20260520-surface-sp9-5g-for-next-v1-0-9df52552bf87@gmail.com> <20260520-surface-sp9-5g-for-next-v1-5-9df52552bf87@gmail.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260520-surface-sp9-5g-for-next-v1-5-9df52552bf87@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTIxMDA4NiBTYWx0ZWRfX29DOsG6+m6GV AatF0wt2JaiiG0juJCAPuLlOpb9yzylrhgXhm8Lz2UiT7k44jcTpblN2D3a55iPOMk80ip10z30 f7gHSjRHThXy/D1SGGfhL4sPk5dAK+caWZQTmd7/3Q6sXtHd72ZR7TwkReDFTVopSWGG+1qGU+G hzk5GYEQVfVPZHVUGJ8h5KQUotHWb7sutjoj1hKSvXap4tan/SLAOX+b5rXFBzEzRsOQ8z5q8XH QiKGVY2eHOkbqmpZNbz3MVlhvciCQSx5x11aardZNbX4SmTFTSrCMXc3n2M6mqxnJaIrcoCDNYV iieQZPZwyy+dAR/0+A9fEdomTRJGdFdGhwHGKEM8gtU86qz2m39rhVfxYQT0c+ETQj2QPM4cV1x 0Vo3KEiM3L+zOdxHnGvsiWnBVhqU/5IHqSfZZYI+qtfbSM05tMRBu8uvkJgrzQmDENDi5jCHj8A 6Fk2iSClLINgpo8UQPA== X-Authority-Analysis: v=2.4 cv=Zckt8MVA c=1 sm=1 tr=0 ts=6a0ec7fc cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=VwQbUJbxAAAA:8 a=gxl3bz0cAAAA:8 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=3tLAdUXkJK0rNdSNFTIA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 a=kiRiLd-pWN9FGgpmzFdl:22 X-Proofpoint-GUID: 6Z426lgmNLT2JF8gLVcGsjGxD1_xpHd0 X-Proofpoint-ORIG-GUID: 6Z426lgmNLT2JF8gLVcGsjGxD1_xpHd0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-21_01,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 phishscore=0 bulkscore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605210086 On 5/20/26 6:40 PM, Jérôme de Bretagne via B4 Relay wrote: > From: Jérôme de Bretagne > > 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 > Signed-off-by: Jérôme de Bretagne > Fixes: f6231a2eefd4 ("arm64: dts: qcom: sc8280xp: Add Microsoft Surface Pro 9 5G") Fixes should go before your sign-off otherwise Reviewed-by: Konrad Dybcio Konrad