From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C6D653081D6 for ; Mon, 22 Dec 2025 09:35:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766396119; cv=none; b=YPPiXuRzQ4MpGCBxC+asyD7VvUEBhrkorxlxZaVVb18P6w4rRkr+KlqLUrZYNP2c4EA8+MacS+i1Vn1QwYrd9lG80DAvjWC+hRZBDmGee9Q3XFR7/O22czbOVYyAE8xpAQdm6u3bz9H/zX5PNcpXysAt6RwHI/alyCSPG44ddyU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766396119; c=relaxed/simple; bh=eTQ3gnqDL/C453V2H0i3B/aeI22bJkpb7Cf5/j+Td9I=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ib/guUo0UT54wwmwQksVZtkF3qDECxdTSZ96C5NBMuvUYWEQNgEyGZJLPoqnPuM9XmZ25h53YLUwf7zkwopEhK6rlfsKyPsz4edEMqiYrskAf5rzzgyESTyNwN3i8y6nBJ4R8iFy/s5sYCXb6FKSls+YUIQ+Txybh5I2JPfi67o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=K3qn92Sl; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=cN01eo0m; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="K3qn92Sl"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="cN01eo0m" Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 5BM8wFH53962292 for ; Mon, 22 Dec 2025 09:35:17 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= FmpiDxql7K1n1hm0treKFgrc+um/Slsa8u/kVttg3uo=; b=K3qn92SlNZOxPV0X 9uZB3/OQ/PcHN/Ayeoa4mdo37x8hNRtYCfybE9QZAlaCjSpm/B4tibHCaK+CMAio nKmBMAZY0tXA0q30lSJMkctcVzf+WXOvLjcYgBqr6lckjaZXPDJyk3p+I2uI8Ic3 5k+J3x3k9RRfj9+yeS4aVq6GlfEl4wYMyxgu0Hw7YiPPm1kruIT+7HwrKbh4dU37 MLc5zYEB3DgFoEIIie1i15tlDRznuV+te4O9m4uannmLJZXVCTBnSYNYx1UVZP4K KCmAw2sybHrySq5O6+lUK2AGlbgdC+OpfGT7FWULf+jpGe5nf4I5p5qUXHRTfjVo /dBH1w== Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4b6vk6h83d-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 22 Dec 2025 09:35:16 +0000 (GMT) Received: by mail-qv1-f72.google.com with SMTP id 6a1803df08f44-88a3a4af701so94406566d6.1 for ; Mon, 22 Dec 2025 01:35:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1766396116; x=1767000916; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=FmpiDxql7K1n1hm0treKFgrc+um/Slsa8u/kVttg3uo=; b=cN01eo0mwrcsuzLWwjreTrcfEyQJhK2Frh67FVJAlhEIBAONdqXfKXYNA3k9YwNlrT S1XnutQMCcj/+SWOjzdBYSSq1BM7dSbU5ocRitDhrhGtcvtGW8XZX2uAlPgpxaoV+8u4 3Wf6IVFPu0xROwTKzwQ/D+KHEVGyHr/vVVjWt/45mDnteBHTjrAgt9ZOJj7JM1Qmw08q oqA5zV8ABU8Bv6LRpR+8nmEO8B0xfe2yte1ZOL3UcLS4YGkpTw/cZiRHsk6nK5EDLU8c jQnw0oD6PBNphTVOapebieFe3lCgIF9bzI+WI5CfClhgCb+B9NDLvRupUmvJxWuxIumW Z43A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766396116; x=1767000916; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=FmpiDxql7K1n1hm0treKFgrc+um/Slsa8u/kVttg3uo=; b=Kqf0FAbHvXQXQdqHr+CFrGVL8RDkPql5Sg4i8Phpl4zd4Jbi6GEhRr4lRmbi2wJnwe Fze4RJW3kJx7jxu/mFGU8ROE/ROmqMZ/uFshRIMCKucJ5RyaQ3PxahD+NWd1gdToXQl+ nXdJ+hETP7Pmb/VtZ5j8y6653hOVhcOcBu6SsQ5aBk5sR7V/k0stWvWTi5jcG8YXmc1U kshVUpasme7GnJRaXL7qY5Re3UYfO+VFqPqSWAy61xdgFeUg5zyLZn+SuzHqQjgu4gyz YfXO0CseKkqyEqxumB8NcP/THfzCTfTDK9SoDk4Kx3T0VuzZRrRkNYd1Edn8Iq0XKgq3 ZFOA== X-Forwarded-Encrypted: i=1; AJvYcCVZh8Lc8SXFQaXBvSbbwBJuNTZCZI9i5mOBL/8H1pV+9KxuEsIfKPUpd8+qeRK60CF9SNgeyWd0MtxFMUs=@vger.kernel.org X-Gm-Message-State: AOJu0Ywk5GOE0YVINgGfDo1vM+53lc/xCF9EqAB2oQHvYjaBzEk3kqpB R3Me7mr8ubzS/tk9UIHk/Efuu4I39PhKJkRhLGlEnemO9BA4IR691fH3rzBq+3nkxP8Zm1ia4oS yic5GBltWu7IZt3lwbpEdIlC2Xdsd0HHUwYaZn0gW3c/hr/pAln16vrfY84XEEUZoMiU= X-Gm-Gg: AY/fxX5DkhmoD1qJ++ZEehAo23ebnbRL4TepLeURqEH6iVVaCsY+aKaZPu+czoi/6Oj 1LJCK0t3x2ItpNMbscDZk2JfRGTFFzMshYtrSWIifnl1SYjZr+moHbrOEg6wZDUNRBJMxT7XKw/ NpnX40jIFqN4woWRtDglhMvDNMkaeVa1SDqQG/upSRDhs2tNX27JiX2RTRSKJ0Qqp9vOfra9SNP GXeZz551eApwH8CAfqwE0xwljGJ2+cFoAhcMFVCiIBcqICdQFuoqaftTx92cxzoFYN8vrSSszEa djFyS37mcX8LoQZdpx6KukqoR7gz7W9Tj73vml5qEWBDaDWUmpSv0z56B+3vPgjgJ5WIo5jHzZJ toweTU68GO0hsTWqGNZfhYRHLeCwxvkjDBdw32+2+J6iG5Y30mTHCgHLyNoi033RiXlHwikuO X-Received: by 2002:a05:6214:d0b:b0:88f:a4a0:2ddf with SMTP id 6a1803df08f44-88fa4a02e88mr86832126d6.46.1766396115894; Mon, 22 Dec 2025 01:35:15 -0800 (PST) X-Google-Smtp-Source: AGHT+IFVTi+WZjnPcS1RXrN/kORrLsbJHUklWnVIPhnPw2oqb8VpSx2D91+O9MKjjxYr4g8/A0cQfA== X-Received: by 2002:a05:6214:d0b:b0:88f:a4a0:2ddf with SMTP id 6a1803df08f44-88fa4a02e88mr86831956d6.46.1766396115480; Mon, 22 Dec 2025 01:35:15 -0800 (PST) Received: from [10.38.247.176] (Global_NAT1_IAD_FW.qualcomm.com. [129.46.232.65]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-88d9a83f6f3sm79332736d6.55.2025.12.22.01.35.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Dec 2025 01:35:15 -0800 (PST) Message-ID: Date: Mon, 22 Dec 2025 17:35:11 +0800 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] media: i2c: imx412: Extend the power-on waiting time To: Sakari Ailus Cc: Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Wenmeng Liu References: <20251222-imx412-v1-1-51c7e724b376@oss.qualcomm.com> Content-Language: en-US From: Wenmeng Liu In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: DwCu1Cbu8Ng1qXp0l93Il77SdJKgrKae X-Authority-Analysis: v=2.4 cv=cuuWUl4i c=1 sm=1 tr=0 ts=694910d4 cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=C3Dk8TwHQYyIj7nOf9RCJw==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=WGNJK96LXhltHBCSghUA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIyMDA4NiBTYWx0ZWRfX/7PqK7Knodck /D80falu4cOrDWHB/2XpJQSw+D2Dhs6Dj9DjhL/5iT9O3wTKxEiEmlJv5PtSPq08ReJhLl+ZC+w I0MUzqLCayV+gyfNWQ0BktxQPgaITvy/lEQhT1/BEStQyRJfHE15ij2TI/y3F87woCgfRFRi/Qt QKvO06aVbl5jaDSG9I8mMV7aF7zieLOrtQSJH36oEW6QxsN+ydqti3HWpdfGAJuiMlFrKyAg8lz SiRAtoQ1/Lmz2BpCa2jrDxIrNVzOt/JrTMS82APK3hUbWm1sfflvXJfmj/spc+OyPaY5/rR0X15 J3H+r5Pisd5mmVTGx6Y3LpIvx2WDw94KwaW2Eiyq0MFHyky1N/27uBlBW9drlvERtdO33NhIII/ 2S33wVJozECAFiANhtv3dkIsknjhhEnF7WuLQmkuzSpglSq4rzniQLNW13Qb842v9UdddEeCDWM uombVtuAsFWfHbDvfCw== X-Proofpoint-GUID: DwCu1Cbu8Ng1qXp0l93Il77SdJKgrKae 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=2025-12-21_05,2025-12-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 priorityscore=1501 spamscore=0 bulkscore=0 suspectscore=0 clxscore=1015 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512220086 >> >> The Arducam IMX577 module requires a longer reset time than the 1000µs >> configured in the current driver. Increase the wait time after power-on >> to ensure proper initialization. > > Is this somehow specific to the Arducam module? If so, what's there in the > module that requires this? > Yes, This issue occurred on the Arducam 22-pin IMX577 module. I have tried changing the sequence of regulator, reset, and clock, and found that this module must wait a sufficient amount of time after reset before registers can be written (10 ms is a safe duration). This issue did not occur when using other IMX577 modules. Thanks, Wenmeng