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Fri, 30 Oct 2026 01:49:09 -0700 (PDT) Received: from [192.168.226.64] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b4d7a4eac5sm382210a12.5.2026.10.30.01.49.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 30 Oct 2026 01:49:08 -0700 (PDT) Message-ID: <36a18bbe-7a2c-422e-82ad-b9d1d87900bf@oss.qualcomm.com> Date: Fri, 30 Oct 2026 09:49:05 +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] arm64: dts: qcom: msm8996-oneplus-common: Drop LVS2 voltage constraints To: webholt@gmail.com, 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, stable@vger.kernel.org References: <20261029-op3t-lvs2-fix-v1-1-42ca9d992c20@gmail.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261029-op3t-lvs2-fix-v1-1-42ca9d992c20@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: B-ZpoaIYXG3AY2AsjBbf7sbcFcfHTxsD X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDMwMDAzNCBTYWx0ZWRfX3yo4ABZ3jlYh ASByE30k+mUwJR1rvqVolJPV0NvHotb5j8UdX6KG71cxQGDJcjM9uH8Q806/5/72m+/GjCoXfPv JmiJQ3D51wfMxcY5ugHHVAjuKx4jsmC6R0vCWw86VHlWJHuX2DGBC7maKCpOgRukuppVds25aoM madpXnURyPE1OAr95UJi7of6R8Pf1RIhFhrnc5yFzddiCnd3KhsJg499iO36MQ1qCnULEkvZ8UE RxupOHj7DYiXNtzgjqlFCoMowvptPtSvJgCzc/Vz+AuL/mFUhAptUIrjE7dzmPLDQvH9Ptvlda5 tmlItwyhZvfYLyrArYNTi1oD4HMNdjO7fw68b2wwlvRYEllS3pAfuKTUJFx665z8QLn+B8uzTLT vREGQbmtLPBS0MHkQ6aI1o69du70xDarKtE0n2RkEQT7UyC/dfIK3p5nv7jjEkDGIyq11mHRKMY /keN7nA5UmrBqZ4rj7w== X-Proofpoint-ORIG-GUID: B-ZpoaIYXG3AY2AsjBbf7sbcFcfHTxsD X-Proofpoint-Spam-Info: AW1haW4tMjYxMDMwMDAzNCBTYWx0ZWRfX28oQcsyNsvfG PyEj8tpHGu8XOeFoRue42DCE4Co+RlhgiT2QbFcnpIVLpCRFMnBEBr73iCGBbd6TKAy/d0OiDkD BdyHGE7D0DEbb/0sXdVXUYA8ejSYSbM= X-Authority-Analysis: v=2.4 cv=KdtHIgYD c=1 sm=1 tr=0 ts=6ae45a07 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=pGLkceISAAAA:8 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=nlTkBPkjGgE2AyCPopkA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 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=2026-10-30_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 clxscore=1015 spamscore=0 phishscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 adultscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610300034 On 10/29/26 7:12 PM, Vladlen Grachev via B4 Relay wrote: > From: Vladlen Grachev > > Since commit 27880745470a ("arm64: dts: qcom: msm8996-oneplus: Add SLPI > VDD_PX"), OnePlus 3T no longer boots: the PM8994 RPM regulator device > fails to probe, so UFS, USB and the display never come up and the phone > hangs on the bootloader splash screen: > > lvs2: failed to get the current voltage: -EINVAL > qcom_rpm_smd_regulator remoteproc:glink-edge:rpm-requests:regulators: > lvs2: devm_regulator_register() failed, ret=-22 > qcom_rpm_smd_regulator remoteproc:glink-edge:rpm-requests:regulators: > probe with driver qcom_rpm_smd_regulator failed with error -22 > > The switch LVS2 cannot report its voltage, so the regulator core asks > its input supply, vdd_lvs1_2, which is not described on these > boards. Checking the 1.8 V constraint then fails with -EINVAL, and the > RPM regulator driver aborts the probe of all PM8994 regulators. > > Drop the constraints, like apq8096-db820c, which describes LVS1/LVS2 > without them. Keep the node, so that the SLPI still gets its px-supply. > > Describing vdd_lvs1_2-supply as S4, as done on other MSM8996 boards, > would also work, but it would only serve the constraint, which has > nothing to enforce on a switch. > > Tested on OnePlus 3T with the msm8996-mainline kernel based on v6.19.5. > > Fixes: 27880745470a ("arm64: dts: qcom: msm8996-oneplus: Add SLPI VDD_PX") > Cc: stable@vger.kernel.org > Signed-off-by: Vladlen Grachev > --- Reviewed-by: Konrad Dybcio Konrad