From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ixit.cz (ixit.cz [84.42.129.46]) (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 9F86843C06F; Thu, 27 Aug 2026 10:19:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.42.129.46 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787825992; cv=none; b=JtXpJRM3TipyaeM+n+ebA5SFM+9/HsjKU2vQ1zxuTsGJp1BaB2FHrHtwKdP0AwH7/5KT4s/jfZqBrKNsu31FcfO9ix63RBm/9nqqbxT62xV6jl7/mRv99gotna0LWH7n2epmjHujSxjHZXFFxsP2yN1gdT1+rMRhxqder8xuhxw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787825992; c=relaxed/simple; bh=nfhJ7KQAlW8rxMQsRjTlreF0OMz8S69ZDzrZOcPWs1Y=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=RWjdQ4TJsuSDXEpK7KiX0LVTAvsTtfBLEsbiPF1kTOInMS41byTz+r+IlsK/vJVrpyxyzgIw+IdjXU5bkaLxWp2/umjmY2q2pHkP5cfdunoHe1UnJK7ueO9LG4EnxNwB6OtF//Zr94leinDu6VhBn3DDfsobJqF2gfAezrgvick= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ixit.cz; spf=pass smtp.mailfrom=ixit.cz; dkim=pass (1024-bit key) header.d=ixit.cz header.i=@ixit.cz header.b=nfMdlEkg; arc=none smtp.client-ip=84.42.129.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ixit.cz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ixit.cz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ixit.cz header.i=@ixit.cz header.b="nfMdlEkg" Received: from [10.0.0.154] (unknown [79.142.128.251]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ixit.cz (Postfix) with ESMTPSA id 5690E53404CA; Thu, 27 Aug 2026 12:19:37 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ixit.cz; s=dkim; t=1787825978; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=4fX1K4FYfBgcQ80NPyAH8DgnQg5Ss1IseTeU8rsivWE=; b=nfMdlEkgiHxl9rdh4j/ax/IbLPPWLom1rUZAmwxgrl0jwsxEgA7yvicwJVN3TIrlvYdCmF kyiSe87z3hmE5l6DMQBKgxzcSvUhzTWMW6QH8gOVS9so6kMzhAN1o9ujscZXTj8gSGY4wG DxlK72Pr4cNDXeFSzYKvCpgVf34ztIc= Message-ID: <8aa4b3d5-d6db-4574-ab1f-1d876bf0f328@ixit.cz> Date: Thu, 27 Aug 2026 12:19:36 +0200 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 v3 1/2] dt-bindings: media: i2c: dongwoon,dw9714: Document DW9714A and V variant To: Sakari Ailus Cc: Alexander Martinz , Bjorn Andersson , Conor Dooley , Konrad Dybcio , Krzysztof Kozlowski , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, phone-devel@vger.kernel.org, Krzysztof Kozlowski References: <20260803-dw9714v-v3-0-8e10278dcd0d@ixit.cz> <20260803-dw9714v-v3-1-8e10278dcd0d@ixit.cz> Content-Language: en-US, cs-CZ From: David Heidelberg Autocrypt: addr=david@ixit.cz; keydata= xsFNBF5v1x4BEADS3EddwsNsvVAI1XF8uQKbdYPY/GhjaSLziwVnbwv5BGwqB1tfXoHnccoA 9kTgKAbiXG/CiZFhD6l4WCIskQDKzyQN3JhCUIxh16Xyw0lECI7iqoW9LmMoN1dNKcUmCO9g lZxQaOl+1bY/7ttd7DapLh9rmBXJ2lKiMEaIpUwb/Nw0d7Enp4Jy2TpkhPywIpUn8CoJCv3/ 61qbvI9y5utB/UhfMAUXsaAgwEJyGPAqHlC0YZjaTwOu+YQUE3AFzhCbksq95CwDz4U4gdls dmv9tkATfu2OmzERZQ6vJTehK0Pu4l5KmCAzYg42I9Dy4E6b17x6NncKbcByQFOXMtG0qVUk F1yeeOQUHwu+8t3ZDMBUhCkRL/juuoqLmyDWKMc0hKNNeZ9BNXgB8fXkRLWEUfgDXsFyEkKp NxUy5bDRlivf6XfExnikk5kj9l2gGlNQwqROti/46bfbmlmc/a2GM4k8ZyalHNEAdwtXYSpP 8JJmlbQ7hNTLkc3HQLRsIocN5th/ur7pPMz1Beyp0gbE9GcOceqmdZQB80vJ01XDyCAihf6l AMnzwpXZsjqIqH9r7T7tM6tVEVbPSwPt4eZYXSoJijEBC/43TBbmxDX+5+3txRaSCRQrG9dY k3mMGM3xJLCps2KnaqMcgUnvb1KdTgEFUZQaItw7HyRd6RppewARAQABzSBEYXZpZCBIZWlk ZWxiZXJnIDxkYXZpZEBpeGl0LmN6PsLBlAQTAQgAPgIbAwULCQgHAgYVCgkICwIEFgIDAQIe AQIXgBYhBNd6Cc/u3Cu9U6cEdGACP8TTSSByBQJl+KksBQkPDaAOAAoJEGACP8TTSSBy6IAQ AMqFqVi9LLxCEcUWBn82ssQGiVSDniKpFE/tp7lMXflwhjD5xoftoWOmMYkiWE86t5x5Fsp7 afALx7SEDz599F1K1bLnaga+budu55JEAYGudD2WwpLJ0kPzRhqBwGFIx8k6F+goZJzxPDsf loAtXQE62UvEKa4KRRcZmF0GGoRsgA7vE7OnV8LMeocdD3eb2CuXLzauHAfdvqF50IfPH/sE jbzROiAZU+WgrwU946aOzrN8jVU+Cy8XAccGAZxsmPBfhTY5f2VN1IqvfaRdkKKlmWVJWGw+ ycFpAEJKFRdfcc5PSjUJcALn5C+hxzL2hBpIZJdfdfStn+DWHXNgBeRDiZj1x6vvyaC43RAb VXvRzOQfG4EaMVMIOvBjBA/FtIpb1gtXA42ewhvPnd5RVCqD9YYUxsVpJ9d+XsAy7uib3BsV W2idAEsPtoqhVhq8bCUs/G4sC2DdyGZK8MRFDJqciJSUbqA+5z1ZCuE8UOPDpZKiW6H/OuOM zDcjh0lOzr4p+/1TSg1PbUh7fQ+nbMuiT044sC1lLtJK0+Zyn0GwhR82oNM4fldNsaHRW42w QGD35+eNo5Pvb3We5XRMlBdhFnj7Siggp4J8/PJ6MJvRyC+RIJPGtbdMB2/RxWunFLn87e5w UgwR9jPMHAstuTR1yR23c4SIYoQ2fzkrRzuazsFNBF5v1x4BEADnlrbta2WL87BlEOotZUh0 zXANMrNV15WxexsirLetfqbs0AGCaTRNj+uWlTUDJRXOVIwzmF76Us3I2796+Od2ocNpLheZ 7EIkq8budtLVd1c06qJ+GMraz51zfgSIazVInNMPk9T6fz0lembji5yEcNPNNBA4sHiFmXfo IhepHFOBApjS0CiOPqowYxSTPe/DLcJ/LDwWpTi37doKPhBwlHev1BwVCbrLEIFjY0MLM0aT jiBBlyLJaTqvE48gblonu2SGaNmGtkC3VoQUQFcVYDXtlL9CVbNo7BAt5gwPcNqEqkUL60Jh FtvVSKyQh6gn7HHsyMtgltjZ3NKjv8S3yQd7zxvCn79tCKwoeNevsvoMq/bzlKxc9QiKaRPO aDj3FtW7R/3XoKJBY8Hckyug6uc2qYWRpnuXc0as6S0wfek6gauExUttBKrtSbPPHiuTeNHt NsT4+dyvaJtQKPBTbPHkXpTO8e1+YAg7kPj3aKFToE/dakIh8iqUHLNxywDAamRVn8Ha67WO AEAA3iklJ49QQk2ZyS1RJ2Ul28ePFDZ3QSr9LoJiOBZv9XkbhXS164iRB7rBZk6ZRVgCz3V6 hhhjkipYvpJ/fpjXNsVL8jvel1mYNf0a46T4QQDQx4KQj0zXJbC2fFikAtu1AULktF4iEXEI rSjFoqhd4euZ+QARAQABwsF8BBgBCAAmAhsMFiEE13oJz+7cK71TpwR0YAI/xNNJIHIFAmX4 qVAFCQ8NoDIACgkQYAI/xNNJIHKN4A/+Ine2Ii7JiuGITjJkcV6pgKlfwYdEs4eFD1pTRb/K 5dprUz3QSLP41u9OJQ23HnESMvn31UENk9ffebNoW7WxZ/8cTQY0JY/cgTTrlNXtyAlGbR3/ 3Q/VBJptf04Er7I6TaKAmqWzdVeKTw33LljpkHp02vrbOdylb4JQG/SginLV9purGAFptYRO 8JNa2J4FAQtQTrfOUjulOWMxy7XRkqK3QqLcPW79/CFn7q1yxamPkpoXUJq9/fVjlhk7P+da NYQpe4WQQnktBY29SkFnvfIAwqIVU8ix5Oz8rghuCcAdR7lEJ7hCX9bR0EE05FOXdZy5FWL9 GHvFa/Opkq3DPmFl/0nt4HJqq1Nwrr+WR6d0414oo1n2hPEllge/6iD3ZYwptTvOFKEw/v0A yqOoYSiKX9F7Ko7QO+VnYeVDsDDevKic2T/4GDpcSVd9ipiKxCQvUAzKUH7RUpqDTa+rYurm zRKcgRumz2Tc1ouHj6qINlzEe3a5ldctIn/dvR1l2Ko7GBTG+VGp9U5NOAEkGpxHG9yg6eeY fFYnMme51H/HKiyUlFiE3yd5LSmv8Dhbf+vsI4x6BOOOq4Iyop/Exavj1owGxW0hpdUGcCl1 ovlwVPO/6l/XLAmSGwdnGqok5eGZQzSst0tj9RC9O0dXO1TZocOsf0tJ8dR2egX4kxM= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 26/08/2026 22:13, Sakari Ailus wrote: > Hi David, > > On Mon, Aug 10, 2026 at 12:24:58PM +0200, David Heidelberg wrote: >> On 10/08/2026 11:38, Sakari Ailus wrote: >>> Hi David, >>> >>> On Mon, Aug 03, 2026 at 11:50:25AM +0200, David Heidelberg via B4 Relay wrote: >>>> From: David Heidelberg >>>> >>>> DW9714A is successor of DW9714 and DW9714V is successor of the DW9714A. >>>> >>>> All actuators are backward compatible, but they do introduce new features, >>>> such as Smart Actuator Control (SAC) mode which can minimize the >>>> mechanical vibration and achieve very fast mechanical settling time. >>>> Support for SAC can be implemented in the future. >>> >>> What kind of configuration does SAC require? Such things generally aren't >>> configured from the userspace, compare e.g. with the dw9719 bindings >>> discussion. >> >> I don't have extra deep insight (except basic how the sensor works). >> >> By default all dw9714* sensors starts in the default "legacy" mode. >> >> The clanker after looking at datasheets and kernel struct produced, if it >> make sense: >> >> the mode and the vibration period (SAC_CFG/PRESC/SACT) have to match >> the mechanical tVIB of the actuator and lens assembly of the given camera >> module, the same way dongwoon,aac-mode/aac-timing/clock-presc do for >> dongwoon,dw9768 and dongwoon,sac-mode/vcm-prescale for dongwoon,dw9719. >> Those properties are left out until there is driver support and measured >> values; note the DW9714V mode set differs from DW9719's, so its enum cannot >> be reused as is. > > I guess this is fine, but without the configuration there's not much > benefit knowing the VCM is actually a bit more sophisticated one. Yes, definitely. I just wanted to use proper compatible from the start. I plan to dive into it deeper when libcamera integrates the AF, as for now doing extra work here has not many benefits. David