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Thu, 26 Mar 2026 09:36:59 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA04.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 62Q9awhE005195 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Mar 2026 09:36:58 GMT Received: from [10.204.79.33] (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Thu, 26 Mar 2026 02:36:55 -0700 Message-ID: Date: Thu, 26 Mar 2026 15:06:52 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: qcom: sm8750-mtp: Set sufficient voltage for panel nt37801 To: Bjorn Andersson CC: , , , , , , , , , , References: <20260323102229.1546504-1-quic_amakhija@quicinc.com> Content-Language: en-US From: Ayushi Makhija In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI2MDA2OCBTYWx0ZWRfX4wn0AcuQ7rg7 5BROEAxqbXQcSB8YCfB7emHawKdH+b7rV/aeddlRPzPvsTM6Aqftat1PFqarxlg4u8agOTpo0M7 BljeIiUWXshHUL7RUF4QT2dEVIEGV0ttaO8H1dqRj3YtXKc6nnZ1ljLfe0JR/sNDhhdl4J/LMpE lYJzT0sAVaBGqKXAjolkJDUi20kN7LM2cPuGsxoTBT9RzaGUYxiTeaFfM1th98dxH5jMWg7IkCS UAjQDYT/Hz8+qUMeBUnzQ6uFdRr1FpUk0fUR38/cJFmEV9MgXB+Skbmij1Zz0+cdedJH9rw5K5B DOVbZ6ddPmX+t1tJDg42XRRjUIuuk5tWh2hyaqLYIaJe/LmgFJeSKAWJaM3iQufZmtE9lG6s5vE +MBfMkk2TEiHPjonaObKf4E4kZ3KOHY5nx44WixBlvxouo2Dn6XzWEw2WBcEsBJ09AFAHeP+hgz uk39MiJlyuNmPZCC4fw== X-Proofpoint-ORIG-GUID: V78TK3gKM0R4oU_XDdcJIlyprYxnUQac X-Authority-Analysis: v=2.4 cv=eOMeTXp1 c=1 sm=1 tr=0 ts=69c4fe3c cx=c_pps a=JYp8KDb2vCoCEuGobkYCKw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=COk6AnOGAAAA:8 a=3Rd_ledAG8Ua1yCYJBgA:9 a=QEXdDO2ut3YA:10 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-GUID: V78TK3gKM0R4oU_XDdcJIlyprYxnUQac X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-26_02,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 malwarescore=0 suspectscore=0 impostorscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603260068 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260326_023703_898624_CC4E3254 X-CRM114-Status: GOOD ( 16.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 3/24/2026 7:34 AM, Bjorn Andersson wrote: > On Mon, Mar 23, 2026 at 03:52:29PM +0530, Ayushi Makhija wrote: >> The NT37801 Sepc V1.0 chapter "5.7.1 Power On Sequence" states >> VDDI=1.65V~1.95V, so set sufficient voltage for panel nt37801. >> > > Please add Fixes: tag. > Hi Bjorn, Sure, will add in new patchset. >> Signed-off-by: Ayushi Makhija > > Please start using your oss.qualcomm.com address. > >> --- >> arch/arm64/boot/dts/qcom/sm8750-mtp.dts | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts >> index 3837f6785320..6ba4e69bf377 100644 >> --- a/arch/arm64/boot/dts/qcom/sm8750-mtp.dts >> +++ b/arch/arm64/boot/dts/qcom/sm8750-mtp.dts >> @@ -462,7 +462,7 @@ vreg_l11b_1p0: ldo11 { >> >> vreg_l12b_1p8: ldo12 { >> regulator-name = "vreg_l12b_1p8"; >> - regulator-min-microvolt = <1200000>; >> + regulator-min-microvolt = <1650000>; > > Are you sure it's not supposed to be 1.8V, given the name of the rail? > > Regards, > Bjorn There was already discussion regarding the minimum voltage for this regulator on sm8550 target on other upstream patch. Link: https://lore.kernel.org/all/aQQdQoCLeKhYtY7W@yuanjiey.ap.qualcomm.com/ This values is according to the NT37801 panel sec "The NT37801 Sepc V1.0 chapter "5.7.1 Power On Sequence" states VDDI=1.65V~1.95V." Thanks, Ayushi >> regulator-max-microvolt = <1800000>; >> regulator-initial-mode = ; >> regulator-allow-set-load; >> -- >> 2.34.1 >>