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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b885b754122sm16092966b.46.2026.01.22.12.47.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Jan 2026 12:47:52 -0800 (PST) Message-ID: <7c59b236-105f-4e73-9df7-792d665c71a0@oss.qualcomm.com> Date: Thu, 22 Jan 2026 21:47:51 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/7] arm64: dts: qcom: sdm660-xiaomi-lavender: fix regulator and SD settings To: Alexey Minnekhanov , Gianluca Boiano Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org References: <20260121203005.13529-1-morf3089@gmail.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTIyMDE1OCBTYWx0ZWRfX7L+V75lsma69 MZ0U5+2gUV7xkk5bzn6R7puTfmGotZDYszeOAvBqEu87ZYesoQDhrstVEDQwwOfQ6F+75IXYaLt ZfDNYlkN8u7n3bOnLUhYlFCxCwfZEBKE6p1xHd5lpWGYZx2GhND8D3gIRsYbu8wgN7G6yBaBiH9 jiuBUO7ohxRde0+zuAo4yj4xzRm54YCOUkAEL2F7+nRT2aayJHKRg0Gz8fv+kUgws5Bj7xc+IXj ERzvS93zISl4e3daTNgghUPYlBpdyPN4ZSeqQAVmUfAad87rZpb4Al8LiCaxpp5IjOMdk/VqQUf MhOj+YQHhT47Jd9t3JnPxkxFRwZjcpdfOyGdFQvp/u5Tarl5M8XOi68csrtqQFbncSH35Jb5OHT qnU6weqAHRSgPqpB9j1MCIgBh5CnYjY7wmSeDyDF5D+txC6RdDj/qthW8wXJzqnNcqRmnyEo1oq LtMCFxBwgyM5gUWh8wg== X-Authority-Analysis: v=2.4 cv=JuX8bc4C c=1 sm=1 tr=0 ts=69728cfa cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=6PQgf4bN_AKydHGJwAgA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-GUID: GXBpEpVFhAwmmZKykxrApbfrXU2B2lDu X-Proofpoint-ORIG-GUID: GXBpEpVFhAwmmZKykxrApbfrXU2B2lDu X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.20,FMLib:17.12.100.49 definitions=2026-01-22_04,2026-01-22_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 priorityscore=1501 spamscore=0 bulkscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 clxscore=1015 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601220158 On 1/22/26 5:34 PM, Alexey Minnekhanov wrote: > On 22.01.2026 14:40, Konrad Dybcio wrote: >> On 1/21/26 9:30 PM, Gianluca Boiano wrote: >>> On Tue, Jan 21, 2026, Konrad Dybcio wrote: >>>> Why regulator-always-on for l3b? >>> >>> This regulator powers the touchscreen. Without always-on, display >>> initialization fails during boot. This matches downstream behavior. >>> I can add a comment explaining this if preferred. >> >> Is there a chance it simply needs to be power sequenced in a specific >> order vs the display itself? (seed drm_panel_add_follower()) >> > > According to my schematics for e.g lavender, vreg_l3b_3p3 does not power > anything directly controlled by HLOS (Linux), it seems to be connected > to p-sensor only, and goes to bottom board. > > The change is done by vendor (Xiaomi) and as far as I remember is there > for every xiaomi-sdm660 device [1]. I wouldn't be too surprised, e.g. sdm845-samsung-starqtlechn has a fake supply hooked up to slpi, as it likely powers some sensors which are governed by it Konrad