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[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: linux-kernel@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