From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 84771237163 for ; Wed, 17 Dec 2025 03:22:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765941779; cv=none; b=PvD9eMZ02pfEuvli4PpsI5jCYPVM3oBscVhp5SWriEkhvKKAR6l/MPT35ahLlyTM3/FlIXEOW+2xwSEZJGk2p32sm4ZFWyrIq3jFxFeEwaqLIzluRNoozifaKUGRKOV7hhsmT4kjF04ZSvJCHf6ABz/WI5AqNrF16fAlVp7x9eY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765941779; c=relaxed/simple; bh=bsdkX0PBndxh3GIVlYbnxprKKDaEFfFM9KmZt8UOBLg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fTLGc+vPhANN+xsgr8bEkCo6QndE3/1t1I1bLdTNf5EPqETeOd7U7Wooo7SoPz+UiEWjHLFETqWax1QgBbVZNqQ8WzfKlpLh/qzRfc2eoPAx/vJs/CejLB0DV94p8cpt2uVoJYXvl9k99KacZU+WgP4krSKNexmIGGmV5Ic3zxo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=Kox+jFKx; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Kox+jFKx" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-4775ae5684fso22930265e9.1 for ; Tue, 16 Dec 2025 19:22:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1765941776; x=1766546576; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:content-language:from :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=coYB7nuMknCPFUDXjLCeAFqddfJIRf4URBuM0pBdh9U=; b=Kox+jFKxtCa8ujP5FuzO7eOqwLm1gN+Kk4MpTCZcxHOE7xbGyyUY8OpsVbA34H89TC Rukng0HUNz2xdqYTyUKl0D941vsmWWhAwdmakIWRUd2AzSyc7NI/OEKf643iFMAWiktU EdmzVpCUJ3ViUGID1u1ig0APNYjhSNWjBe8VrqqPV1qUZGruvncIj0/zrzgz06vdC1wD LI0c76MgG4cbCY4mNmB0YRoENeiLb8EdvHiM5vCHpMr8tZoRjtiNNO+WdGgVgUTAkylE vOmDbLpdR5+SmO4YG6EgJGHtcAgPa0+IDL0h91TnqlV1DmvGn5v46f/BPMKOW5VgsV1S oggQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765941776; x=1766546576; h=content-transfer-encoding:in-reply-to:content-language:from :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=coYB7nuMknCPFUDXjLCeAFqddfJIRf4URBuM0pBdh9U=; b=nLu8V4z91LgSIcUnj06FVv6PZ2qoukCDfxuDbCEwJrtHTQygcB+bTUjHbuLXnUjrtZ 550WxMEkWj2HPqbQi4HnAYgqTx0YfRxI1fyB/HBSTTQWymTURf2kSu2TNj1Gw+Pg48XR 0nqf0/Qgf2I7CanAzLOgn9e9ifz4WcGagd7m32FJprsoqH5+VdUjbIyznJzcxPMZCzJR 6CthEzi0f+zzLkgkYvDVpXUmy49FPMA3JwTE+9Pzuow0ZEUnC6GhgOOHpdJMgDoDqOB2 poroFKT5FGAgbl4OVyAiD9I/wd2K4HZLG/HcQ080vhA4SpRArfbcoKSiVRcWf5bCcsrm 0mlA== X-Forwarded-Encrypted: i=1; AJvYcCUWlxBtWdawGsqpPkUdls8bEH0W3Nn63vC/gSdbBbQncyy0jWfq/m9z0xj7GK+rlMVazhrxCckfOUc7@vger.kernel.org X-Gm-Message-State: AOJu0Yy+z1sOIQXc6/X2HguPbxjrpV2Mmb0p91lWcEHy9kX5dVzcmuqd Wbnh7TdffEyGcLuWU1hMTtL5HYCq0in+A1jce98U/EfjBKYdFJ4q5+6Q0vlVBtH9bhU= X-Gm-Gg: AY/fxX6chEYXSp6DQK+kn5Q1DzmZ9AYcqXvT/+cz31osAvHDocQ0SEaXrGOnvUhTzUD pFT+mUrmeknOzJs9y9rPp9LNs9PdKOh3bF7OUB/p/AOFMXyJLmUBwojj2Pd1P9TpHcL2s1nzDh3 I8utuJ15dsE6+Jp+t1FQW1HEjlYAi1MAmqlbCUUCm+CFIIhnKiyEHmH5c2yU09y94h3FtsmGm3R GZVScG9sTu+2vuqrovX1BwrXvNjChCxkf7Pg8yhmWpi1mrTdi7VAm84OfPgAzXvYH2yYjltt7+a CZ4HGac4YQtfGnOEBfXHub7w3MTDlBzVMUmaYL35RAnmq/tpXrqfTqeGuFFG1XuOHEVLaVBWNBz zGxGU+MoWCfSO3gIkj9DP87KXUzv2rKmFFNlLslSfSjlR7L8bObDtfz6QJh99XRxjfGkAC53RH+ NswshVC1HvEIDFP8K61uabpn/bdfgWckbzdFjSVsQ6KKIbF0LCBr+W X-Google-Smtp-Source: AGHT+IGKzYIQHH56Wfgqk3sgtUblvN3f3xNfZ4d0w5Te3dTerDrm37WC8DhCLtrjaYPiuQ095zpJPQ== X-Received: by 2002:a5d:5f87:0:b0:430:fc63:8c8 with SMTP id ffacd0b85a97d-430fc630e5amr10101546f8f.35.1765941775811; Tue, 16 Dec 2025 19:22:55 -0800 (PST) Received: from [192.168.0.40] (188-141-3-146.dynamic.upc.ie. [188.141.3.146]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4310ada82d5sm2461243f8f.4.2025.12.16.19.22.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Dec 2025 19:22:55 -0800 (PST) Message-ID: <4b6ccfc5-9d05-42c6-bb70-32500646c46f@linaro.org> Date: Wed, 17 Dec 2025 03:22:54 +0000 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 1/5] media: dt-bindings: Add CAMSS device for Kaanapali To: Vladimir Zapolskiy , Vijay Kumar Tumati , Konrad Dybcio , Hangxiang Ma , Loic Poulain , Robert Foss , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Todor Tomov , Mauro Carvalho Chehab Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, aiqun.yu@oss.qualcomm.com, tingwei.zhang@oss.qualcomm.com, trilok.soni@oss.qualcomm.com, yijie.yang@oss.qualcomm.com, Jingyi Wang , Atiya Kailany References: <20251113-add-support-for-camss-on-kaanapali-v6-0-1e6038785a8e@oss.qualcomm.com> <20251113-add-support-for-camss-on-kaanapali-v6-1-1e6038785a8e@oss.qualcomm.com> <37d0f89f-69be-45a7-90fa-347d6a3800bf@oss.qualcomm.com> <2d7ac7e8-ab69-44a6-b732-3657abf3a5a6@oss.qualcomm.com> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 17/12/2025 00:02, Vladimir Zapolskiy wrote: > My concern is that it makes very little sense to throw any not clearly > defined hardware properties and interconnections into an unorganized and > unmanageable pile of everything, because this closes the door to ever > update > the upstream CAMSS driver by adding better CAMSS IP support for any already > manufactured and sold Qualcomm SoC powered board with done CAMSS support. > > If some user already holds a phone, a laptop and expects to offload CPU to > CAMSS IP one happy day, it's pretty unsatisfactory to say that it will > never > happen on legacy hardware, because there was done an unrecoverable mistake > by adding never tested properties into CAMSS DT bindings, and the remained > option is to "wait for future chipsets". Each added unsupported and unused > property boards up the window of better CAMSS support on manufactured > boards. > > I don't understand a reason why to do worse for the upstream, when there is > a clear and feasible alternative not to do worse, thus my misunderstanding > and my grief for upstream CAMSS are my concerns. I don't think this answers the question on how describing all of the CAMSS hardware precludes switching on demosiac. To be frank, I don't see any specific arguments here at all. --- bod