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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-647b2ec2ff8sm796987a12.7.2025.12.04.01.17.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Dec 2025 01:17:04 -0800 (PST) Message-ID: Date: Thu, 4 Dec 2025 10:17:01 +0100 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 v4 09/12] arm64: dts: qcom: sdm845-lg-common: Add camera flash To: Paul Sajna , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Heidelberg Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, Amir Dahan , Christopher Brown References: <20251125-judyln-dts-v4-0-a5a60500b267@postmarketos.org> <20251125-judyln-dts-v4-9-a5a60500b267@postmarketos.org> <62ce91326c0e1d5aef1ad5ecad9b99695f983347@postmarketos.org> <863db415-51e0-4c54-85bf-ac6a168758e0@oss.qualcomm.com> <9cdccbb5a3fb10a2d7de1e1d17d36018f40b18a1@postmarketos.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <9cdccbb5a3fb10a2d7de1e1d17d36018f40b18a1@postmarketos.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjA0MDA3NSBTYWx0ZWRfXzXHihlXQq/Qd GMN9wRWpVySQBLLehWBsluJ3/ddZJy6Kd8aPizK5v5saVSA+CTOX8ukhV6T6wFH7XKEKWAa0OWl 2uLvZZTvlr1HG9FAisegT5A78hlEA1iXqz7SyxzUHkYobrCNk9EMlHNXgfuWqUxdUwWoXR/6OKL +pvbscDrzL6wxS4Qnt6rAEHK4awRiMud6kRAu3YzVMmHpm1yZrzp3UpTqa5evF73wGVLp3N/xxR N3vr5hpMJhGS+c0gadXDfL1cnh/xiWqOB87maJeyEpYMSaU52unzUojdkXLQAXB0+aZWK/ZyPda Fbn28vluLqmOOIsfiCAkRnt5xVn34ubAo5yv5XOEx7NbTwpCseUwgGGaSdshXlr0OnKrZRTGXH/ +HKH8HjadXQOmRe8dqPNYRT3asDP2w== X-Authority-Analysis: v=2.4 cv=d7n4CBjE c=1 sm=1 tr=0 ts=69315192 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=ubcZd0e3b_FObW4-F2kA:9 a=lqcHg5cX4UMA:10 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 X-Proofpoint-ORIG-GUID: Oaa8N-VLEpWRRhQ3nAF5rR3eSRVZhdsl X-Proofpoint-GUID: Oaa8N-VLEpWRRhQ3nAF5rR3eSRVZhdsl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-04_02,2025-12-03_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 suspectscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 clxscore=1015 impostorscore=0 malwarescore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512040075 On 12/3/25 10:27 AM, Paul Sajna wrote: > linux-postmarketos-qcom-sdm845-6.16.7_p20251203010632-r0.apk > > > December 1, 2025 at 11:42 AM, "Konrad Dybcio" wrote: > > >> >> On 11/28/25 9:20 PM, Paul Sajna wrote: >> >>> >>> I did more testing on this, and the led only comes on if it's brightness is set to approx 150/255 or lower. In that case, should I set led-max-microamp to 60mA? >>> >> FWIW your downstream kernel sets up channels 0 and 1, here you only >> enabled 1. Taking a look at a picture of the phone, I only see a single >> LED on the back, so perhaps you're (over)driving a single power line? >> >> I'm not a milion percent sure, but I would assume the current draw >> *limiting* register applies to the sum of the current going through >> the three channels because there's only a single instance of it. >> >> Konrad >> > > I tried setting up both, but only the one that was mapped as `led-sources = <2>` seemed to have any effect. Also it would confuse userspace flashlight apps if there were two I think. So I'll push v5 with just the one that does anything. led-sources is parsed into a bitmap and written into REG_MODULE_EN, this doesn't translate into anything that's userspace-visible That would instead be the case if you defined a pair of LEDs under the device node (which is valid if there's two separate ones, such as for some phones with a back and front LED flash) Konrad