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 8AE0B16BE29; Wed, 28 Aug 2024 11:09:17 +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=1724843357; cv=none; b=mVOLIAYqRBLZiRpmPk6UO/Y9D9vQO4j1ZgWH5e/A7qI3aDVzu7KHu5EquzJSgkebWSN5UC6j9mSJDUKS+QSt/ZBE4vi+A9nzavVGIiSGhtzECGNESOeYQcGUC9Jy+H9FkP+odEq6RPSdhjKkXUpVFPjlRRyUJGn7yypjKtw8g9c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724843357; c=relaxed/simple; bh=+iBZN7J1CfkA6Io8Lrp7yXOxydaxe3SvIGkgl4gtnKA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=VrAHYm8IUYMALd3AtZQlkG1SdkeahGk3bQcYjjD6CnbXX5ajgjMs5M0QYdRVt03HEbvYhfzoqCjeNVycsBWRHtE1uwcGiYR6+PLtqG+z9++oHMpRso6KsXgqqKP5N3eXYczbJ6DTwOfoNPqxIvFYcropvliSoMpv7tr5GfeOczY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CvGo+n3B; 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="CvGo+n3B" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D414EC51EFE; Wed, 28 Aug 2024 11:09:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724843357; bh=+iBZN7J1CfkA6Io8Lrp7yXOxydaxe3SvIGkgl4gtnKA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CvGo+n3BWtvt+eqAWsY9i7U1WvPPAmroKdDj88yG515Yeh4WZjwemALijP9CKFHaQ 4eEluwbyawdzfofe2n+++DgSeYEqaF4XqWhEx1aav+3q3j1Zn916K/anDFWrbiZRdn LavXuR7Gf+AfT8J8qe/zwOntuJzaueMDaGikwZNvPMVJv6K9wKNsXdD3IMvlYmSQjW CddEOCPLM1IzPbm6Lryxaye07C2+FmIcTtsuToXAuhibaBEItw/b21M/i/POu43BY9 H+p62Yt0c7xM5rSN/h+anvcdUFU1Oq/Ofmpz3dsEjGj7HIrRI//4d3HS1l0XMVrhB5 0/KeeVgRZuW+A== Message-ID: <4cf53373-ca57-4990-b85c-e58c200bc062@kernel.org> Date: Wed, 28 Aug 2024 13:09:11 +0200 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 v2 1/6] dt-bindings: media: renesas,isp: Add Gen4 family fallback To: Laurent Pinchart , =?UTF-8?Q?Niklas_S=C3=B6derlund?= Cc: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org References: <20240826144352.3026980-1-niklas.soderlund+renesas@ragnatech.se> <20240826144352.3026980-2-niklas.soderlund+renesas@ragnatech.se> <20240827081233.GE2636928@fsdn.se> <20240827213441.GA30398@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: 8bit On 27/08/2024 23:34, Laurent Pinchart wrote: > On Tue, Aug 27, 2024 at 10:12:33AM +0200, Niklas Söderlund wrote: >> On 2024-08-27 08:31:22 +0200, Krzysztof Kozlowski wrote: >>> On Mon, Aug 26, 2024 at 04:43:47PM +0200, Niklas Söderlund wrote: >>>> The ISP Channel Selector IP is the same for all current Gen4 devices. >>>> This was not known when adding support for V3U and V4H and a single SoC >>>> specific compatible was used. >>>> >>>> Before adding more SoC specific bindings for V4M add a family compatible >>>> fallback for Gen4. That way the driver only needs to be updated once for >>>> Gen4, and we still have the option to fix any problems in the driver if >>>> any testable differences between the SoCs are found. >>>> >>>> There are already DTS files using the V3U and V4H compatibles which >>>> needs to be updated to not produce a warning for DTS checks. The driver >>>> also needs to kept the compatible values to be backward compatible , but >>>> for new Gen4 SoCs such as V4M we can avoid this. >>>> >>>> Signed-off-by: Niklas Söderlund >>>> --- >>>> * Changes since v1 >>>> - New in v2. >>>> --- >>>> Documentation/devicetree/bindings/media/renesas,isp.yaml | 3 ++- >>>> 1 file changed, 2 insertions(+), 1 deletion(-) >>>> >>>> diff --git a/Documentation/devicetree/bindings/media/renesas,isp.yaml b/Documentation/devicetree/bindings/media/renesas,isp.yaml >>>> index 33650a1ea034..730c86f2d7b1 100644 >>>> --- a/Documentation/devicetree/bindings/media/renesas,isp.yaml >>>> +++ b/Documentation/devicetree/bindings/media/renesas,isp.yaml >>>> @@ -22,6 +22,7 @@ properties: >>>> - enum: >>>> - renesas,r8a779a0-isp # V3U >>>> - renesas,r8a779g0-isp # V4H >>>> + - const: renesas,rcar-gen4-isp # Generic R-Car Gen4 >>> >>> Adding generic fallback post-factum is odd, does not feel reliable. >>> Instead use specific compatibles as fallbacks. >> >> I agree, it feels a bit odd. But this was the road we hammered out at >> great pain for how to be able to move forward with this issue for the >> other IP block involved in video capture for R-Car Gen4, VIN [1]. This >> just mirrors that long discussion decision for the R-Car CSISP. >> >> I would hate to have different solutions for the two. >> >> 1. [PATCH v5 0/6] rcar-vin: Add support for R-Car V4M >> https://lore.kernel.org/all/20240704161620.1425409-1-niklas.soderlund+renesas@ragnatech.se/ > > The compatible fallback for VIN has been added following a request from > Conor and Rob, so it would be nice if the three of you could agree to > achieve consistency in the bindings :-) We are consistent. Above snarky comment is not helping, so please keep it civilized. Best regards, Krzysztof