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Mon, 09 Nov 2026 07:41:17 -0800 (PST) Received: from [192.168.226.72] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b755543354sm33732a12.35.2026.11.09.07.41.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 09 Nov 2026 07:41:17 -0800 (PST) Message-ID: <427e15a6-cbb1-4c3d-9547-cfaa08fa90b3@oss.qualcomm.com> Date: Mon, 9 Nov 2026 16:41:14 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC] arm64: dts: qcom: mahua-lenovo-thinkpad-t14s-gen7: Describe the HDMI port To: Abel Vesa , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20261109-t14s-gen7-hdmi-port-v1-1-1a691e6c180e@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261109-t14s-gen7-hdmi-port-v1-1-1a691e6c180e@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=AbYkjHXG c=1 sm=1 tr=0 ts=6af1e99f cx=c_pps a=hnmNkyzTK/kJ09Xio7VxxA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=bC-a23v3AAAA:8 a=EUspDBNiAAAA:8 a=WC968W-qZJN9GzRUQ40A:9 a=QEXdDO2ut3YA:10 a=PEH46H7Ffwr30OY-TuGO:22 a=FO4_E8m0qiDe52t0p3_H:22 X-Proofpoint-GUID: wJJ5BYVn0Mayv_ChbswIXxPJb8TdHScj X-Proofpoint-ORIG-GUID: wJJ5BYVn0Mayv_ChbswIXxPJb8TdHScj X-Proofpoint-Spam-Info: AW1haW4tMjYxMTA5MDA2MiBTYWx0ZWRfXzg7R3a6NcuHy U+dwkhHk185dlMA9ET2BvPx2eLxn2L19c9nJ5V56A3gThHlJyyBoKIGWnqmoev6dfnL0W10hFwE Fq21rJAdw4B02jvCDi3pBf+k9YqQqVk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTA5MDA2MiBTYWx0ZWRfX1u1din56VieB vOfQB3VUijZ99Y5wxYo3EyTNiYr43DGvDfdNu8oHah+4C9u2SEKAxKLgk+U4aamHVS4+EihiYRU RkO2uifQ52tM4Ccarv0jND5oJam/u3OxtZu2klbmgKVJGaaouab1d+0G1DUs7yddTzc6GHHBxvW +dS7nK63cHtGdNAwwawlqjgL/B9+D2jJrlcebl1G/1a+nWuMua31D9b67JBJKsXs2JWvzbh4Vr3 0ce0k/AXumz84jlPQIzi2nLH3n3Swt6+9TI2dYyCa7/3L83L/EHxYRPwjc7jDgeI65+VUzQE8f6 AebyARNZI+kxzYmZarrL5EHdHI+GsDtBm7wx+ZRHXxA9rL6WvfTw0lYNU2coKuGfpBfPrsJ+gT1 ZiCcdUr7TF9FdCua8FXJSzKP8IiK4OXJ+AYyQgPHEJNq/OWzqss66D4Zn0ENRctU/GXi0kkNA+V f0kpIcR3YakWfZ5RbYQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-09_05,2026-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 bulkscore=0 spamscore=0 clxscore=1015 adultscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611090062 On 11/9/26 10:06 AM, Abel Vesa wrote: > The HDMI port is driven by the third DisplayPort controller through the > DP lanes of the third USB/DP combo PHY and a Realtek RTD2171A DP to HDMI > bridge, with the HPD signal on GPIO 126. The USB3 lanes of this PHY are > not connected, the third USB controller only serves the eUSB2 port of > the fingerprint reader. > > Describe all of this so the HDMI port works. > > Signed-off-by: Abel Vesa > --- > This depends on the LDO voltage fix sent separately, as the combo PHY is > powered from one of the rails it fixes: > > https://patch.msgid.link/20261108-t14s-gen7-ldo-voltages-v1-1-e0ad0d528767@oss.qualcomm.com > > Tested on a ThinkPad T14s Gen 7 (LCD) with a 1920x1080 monitor: the DP > link to the bridge trains at HBR2 x4 and the monitor shows the desktop. > --- [...] > > + hdmi_hpd_default: hdmi-hpd-default-state { > + pins = "gpio126"; > + function = "usb2_dp"; > + bias-disable; > + }; nit: order otherwise whichever way we end up merging the dependency Reviewed-by: Konrad Dybcio Konrad