From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 620702E2F01; Tue, 12 Aug 2025 10:28:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754994523; cv=none; b=pgb0sLXGRJTPUltpI2SImPpRHT/yS5HmPi9jRegWZYoq9Gk1rlCXC0Y/jRegfrGjV8T1j9Uaa6Y/PgTCM8HSrviPRB8e9mtaOz0wvcv4igllD4zm9ggqMbx5/ZVmMK00q4rKsu8/jH0TW8Q9likCHrWZaHt75kWoUe/XpliKeZQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754994523; c=relaxed/simple; bh=UYfIb3p1Vm82p1tWRc07r1qQJo2LPLgYKqInhDrFQE8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=islXq80clqgpWJgwBvv9IGrvpkjPUJVzeuqPD7AiIf26j5wXNJ6Ku47a3N9V3had2c9O0Qd4dtOAg5cB5fk263NrABd34HmBioq2w6I2rt6RhIqSGoa6UE9OoJFFaTil1rGYqJwcEbPqHEFdRi5YcT9HewEIKKkY0sFh6oJGPW0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mUwSbtti; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mUwSbtti" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E49EFC4CEF0; Tue, 12 Aug 2025 10:28:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754994522; bh=UYfIb3p1Vm82p1tWRc07r1qQJo2LPLgYKqInhDrFQE8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=mUwSbttileiBGGJeo2548tdI7H8pyN6AOfdEUL0FdRHYDi/LiZCNLUVY43qzFXI23 cwg6571ZqRM589Jyq68QXneM3m38I8rlPnqQN3ZcfFB7ctLjJcCOJEUU0b8h68gCGi A9uOSr/h6XwG0Ef2I5gx5y/I5O/w7PiChU7qQKt6mymOi4WjOFS4l7cPkzascgI5kG EV2aOObMn39Eb2eeTlKspyfwGBsqGPMjyGxCkBNkGxQeIefEM1JTdeK7v99J6yPy8W Syxflka5G70e7kTUs81PfLJbS28NkRzk+VEz7v+YSWRblSIMYkUxms0dPniz0ZhQSu zfsp04ak+NHJg== Message-ID: Date: Tue, 12 Aug 2025 12:28:28 +0200 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: (subset) [PATCH 00/72] media: i2c: Reduce cargo-cult To: Laurent Pinchart Cc: Bjorn Andersson , linux-media@vger.kernel.org, Sakari Ailus , Mehdi Djait , Alim Akhtar , =?UTF-8?Q?Andr=C3=A9_Apitzsch?= , Andrzej Hajda , Arec Kao , Benjamin Mugnier , Bingbu Cao , Bryan O'Donoghue , Bryan O'Donoghue , Conor Dooley , Daniel Scally , Dongcheng Yan , Dongchun Zhu , Fabio Estevam , Geert Uytterhoeven , Hans de Goede , Hans Verkuil , Hao Yao , Heimir Thor Sverrisson , Jacopo Mondi , Jason Chen , Jimmy Su , Jingjing Xiong , Jonas Karlman , Konrad Dybcio , Krzysztof Kozlowski , Lad Prabhakar , Leon Luo , Liam Girdwood , Magnus Damm , Manivannan Sadhasivam , Mark Brown , Matthew Majewski , Matthias Fend , Mikhail Rudenko , Nicolas Dufresne , =?UTF-8?Q?Niklas_S=C3=B6derlund?= , Pavel Machek , Pengutronix Kernel Team , Ricardo Ribalda , Rob Herring , Sascha Hauer , Shawn Guo , Shunqian Zheng , Sylvain Petinot , Sylwester Nawrocki , Tarang Raval , Tianshu Qiu , Todor Tomov , Tomi Valkeinen , Tony Lindgren , Zhi Mao , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-omap@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-samsung-soc@vger.kernel.org References: <20250710174808.5361-1-laurent.pinchart@ideasonboard.com> <175495482477.157244.17354544707184168458.b4-ty@kernel.org> <20250812085112.GH30054@pendragon.ideasonboard.com> <20250812093915.GI30054@pendragon.ideasonboard.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/08/2025 11:39, Laurent Pinchart wrote: >>>> >>>> [12/72] arm64: dts: qcom: sdm845-db845c-navigation-mezzanine: Replace clock-frequency in camera sensor node >>>> commit: 5433560caa5e7e677a8d4310bbec08312be765b4 >>> >>> I'm afraid that's too soon. This will introduce a breakage without a >>> corresponding change to the camera sensor driver. >>> >>> I will post a v2 with the patches reordered. We could merge the V4L2 >>> side in a rc1-based stable branch and merge than in the arm-soc tree as >> >> You cannot ("cannot" as not following the process) merge drivers into >> DTS branch. > > Ah, I wasn't aware of that. DTS trees don't allow merging stable > branches shared with other subsystems ? Does it mean that a DTS change Not with driver subsystems. Why? Because it breaks encapsulation of hardware description being entirely independent of given Linux driver implementation. BTW, it is already documented in maintainer-soc in ABI stability (I will fix "devicetree" ambiguity to DTS) and driver branch dependencies. > that depends on a driver change always need to be delayed by one kernel > version ? This is one solution, although as I mentioned later it still affects all other users of DTS, so it has its own drawbacks. Other solution is to keep both properties for more than one cycle. > >>> well, but I think we can also delay the .dts changes to the next kernel >> >> All users of DTS will be anyway affected and commit msg should address that. > > Which commit message, the one for the driver changes or the one for the > DTS changes ? I plan in the next version to indicate that the DT changes > depend on the driver changes. DTS changes, so the soc maintainers can judge whether they care about other DTS users or they do not. Best regards, Krzysztof