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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b79f4975dcesm332867266b.34.2025.12.05.02.35.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Dec 2025 02:35:13 -0800 (PST) Message-ID: <9b3f2adc-bd64-4f6f-8a40-9e2884e46782@oss.qualcomm.com> Date: Fri, 5 Dec 2025 11:35:10 +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 v5 10/12] arm64: dts: qcom: sdm845-lg-judyln: Add lab/ibb 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, ~postmarketos/upstreaming@lists.sr.ht, Amir Dahan , Christopher Brown References: <20251203-judyln-dts-v5-0-80c1ffca8487@postmarketos.org> <20251203-judyln-dts-v5-10-80c1ffca8487@postmarketos.org> <84a17875-0542-47cf-ac4b-5af7bbdc5edf@oss.qualcomm.com> <7909626f3116fcb9feb25b77820a98da56e1283a@postmarketos.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <7909626f3116fcb9feb25b77820a98da56e1283a@postmarketos.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=ZqDg6t7G c=1 sm=1 tr=0 ts=6932b563 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=Gbw9aFdXAAAA:8 a=T4PGsqDLbnwIIwvigI4A:9 a=lqcHg5cX4UMA:10 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 a=9vIz8raoGPyDa4jBFAYH:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjA1MDA3NyBTYWx0ZWRfX1aWUA5iIEgiN yhCEctlFM6R7W9wLXj4HHwkCvpg7SIIo8xqDPVx5r6xEGH3B+khjfkORVXjYdFdqfp6pYscPBzU wiv4RgD7pGawAyp6yYo/CvA3wdPAvWBbQ2VDazyZVIUNuTdhhSYYptPMXq4CDvsdTk1E8lP701J 35YWSwDSvndp+fYALOGO+dnPBmQWEaVqjub0rgAsTF+KnVAlRhv64HyLv3VTq/pPAc4iHNFH1Kr y0oNx1X8wQt0TB+LeNUx+NZ9zc6lsosByydI9rojzzGYIdNG9CeVMaFehz9bFjqsVvzUcxmqmFr yKB/aCZ7wlfVVsEm25zJqNI22MiOwupGrXM7AaJmpTESebGSBviR1dJRgqFgvAQTUTvlvReWVRu Yq4zsiRJ+Gc6nKdr3ZcBx6sttrL9ig== X-Proofpoint-ORIG-GUID: dzea9kN3v48GDXKzKeM9VtAsdnAJqlhZ X-Proofpoint-GUID: dzea9kN3v48GDXKzKeM9VtAsdnAJqlhZ 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=2025-12-05_03,2025-12-04_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 clxscore=1015 phishscore=0 spamscore=0 bulkscore=0 impostorscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512050077 On 12/4/25 7:47 PM, Paul Sajna wrote: > December 4, 2025 at 12:50 PM, "Konrad Dybcio" wrote: > > >> >> On 12/3/25 10:40 AM, Paul Sajna wrote: >> >>> >>> These regulators are required for the LCD >>> >>> Signed-off-by: Paul Sajna >>> --- >>> arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts | 17 +++++++++++++++++ >>> 1 file changed, 17 insertions(+) >>> >>> diff --git a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> index 8b88f75b36af..cdaf84de5e6c 100644 >>> --- a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> +++ b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> @@ -56,10 +56,27 @@ zap-shader { >>> }; >>> }; >>> >>> +&ibb { >>> + regulator-min-microvolt = <5500000>; >>> + regulator-max-microvolt = <5700000>; >>> >> These ranges seem much more reasonable, although I would still >> expect there's a single operational voltage - unless the panel driver >> is supposed to call regulator_set_voltage() in some different power >> modes? >> >> Konrad >> > > So min/max both 55? Or is there another property I should use? > I wasn't sure if that would be physically hard for the regulator to maintain such precision, so I cross-referenced some other DTs in the qcom folder and found this 200mv allowance in one of the sony devices. These regulators are very accurate - set it to 5.5 Konrad