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[2a01:cb08:52d:7400:bbd7:ca83:de4a:f625]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45eaa92f622sm4635686f8f.24.2026.05.21.10.59.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 May 2026 10:59:31 -0700 (PDT) Message-ID: Date: Thu, 21 May 2026 19:59:30 +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 05/11] arm64: dts: qcom: sc8280xp-arcata: Fix top USB-C DP alt mode To: Konrad Dybcio , 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> <990a0d6b-ef5c-4d7b-ab63-e75c37825397@oss.qualcomm.com> Content-Language: en-US From: =?UTF-8?Q?J=C3=A9r=C3=B4me_de_Bretagne?= In-Reply-To: <990a0d6b-ef5c-4d7b-ab63-e75c37825397@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 5/21/26 10:53, Konrad Dybcio wrote: > 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 Sure, I will change this in v2. > otherwise > > Reviewed-by: Konrad Dybcio > > Konrad Thank you, Jérôme