From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4E3F2D35176 for ; Wed, 1 Apr 2026 11:03:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6YpwsptX1awA8ujy0eaUsfbVkv5IbPERf9ttL5zaPyc=; b=HoxaWhhsdroRn+ffiFAZCZLv7v tqdRfKHxIoZgKmpuGi7mxxXJW/+47OkpwDw234d+fOOMobHe8WyxQuFD6//ZgQ7bYbMD21s8hXIkU 1E+BwHLHc49Oxv/Ni4fTl5V8AszAYVGHDfpUNyw3lkj4/11ZxMzu2bl4jL4tmtT0/sJJYAXlb1n5v XXZJ7GOmLY0sEq1WtEbxASPuuYNwSon/Fh1nJ2nLfcSvHARH7Eem9RqyomotN7o/cL/H/2CVMJqIo 8p7z3yZc5vKc2ojFwNtdpPZ/w0RhzOgc4Bh4voo3EaginDW//gVee5DRBOe6G9Ltkv2R3cg9VL8+b u7haQT9w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7tLw-0000000EapI-3Hop; Wed, 01 Apr 2026 11:03:16 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7tLv-0000000Eap9-0BtX for linux-arm-kernel@lists.infradead.org; Wed, 01 Apr 2026 11:03:15 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 6E1E56013B; Wed, 1 Apr 2026 11:03:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29CD7C4CEF7; Wed, 1 Apr 2026 11:03:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775041394; bh=oCEaxN73eSvvxvMxeBnhyZYSHteZ4hIRlfxN2j/YYyw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=b0md1H/bwbTF6mvFV32llO23OmSxd/7rtsSD6KNBdw+dD6cx/eZjCVYRLs+lC+OA8 BLx8wcM89G/4b5PXsyGthneTFM7H4ahHA+CfNr172wxkSNVpsb8rdqYaLHX2rEHLJD bpzmGfqwHtHTroS1duDKvzqxz9MNqjUnwxxjZ51/rdrijRVS1fOlKWombiJwg7xHwV HSRhD7+PB3sBgT+W9TSSSh/JKaJyeElCtDraZhseNtG8yLsMXEVbOqR43VMzvUysJX ZFutLo1LSVGJejshfD7ot27Cxy74tAb1iapbFpGZDgK9kJ7QmXYkiBi0JCJo0GCCrJ ZGfOlFCbsXUgg== Message-ID: <253608f3-8b47-428d-a703-97dcd9731628@kernel.org> Date: Wed, 1 Apr 2026 13:03:07 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: gpu: mali-valhall-csf: Document i.MX952 support To: Guangliu Ding , Liviu Dudau Cc: "Daniel Baluta (OSS)" , Daniel Almeida , Alice Ryhl , Boris Brezillon , Steven Price , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , "dri-devel@lists.freedesktop.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "imx@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" , Jiyu Yang References: <20260331-master-v1-0-65c8e318d462@nxp.com> <20260331-master-v1-1-65c8e318d462@nxp.com> <99a1da55-d6e5-4d11-abaa-8c85283ab5f2@oss.nxp.com> <2f4c4063-daf6-48f2-b830-9f58dc7af80d@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 01/04/2026 13:01, Guangliu Ding wrote: > Hi Krzysztof > >> On 01/04/2026 12:31, Guangliu Ding wrote: >>>> Either add the patch(es) that use the compatible to this series in >>>> v2, or put a comment in the commit message on where we can see the >> driver changes. >>>> >>> >>> According to discussions with the GPU vendor, this is a hardware >>> limitation of Mali-G310 rather than a hardware bug, and it has been >>> addressed in newer Mali GPU families. >>> >>> In addition, ipa_counters are not enabled in the current Panthor >>> driver. We observed this issue with the private Mali DDK where ipa_counters >> were enabled. >>> Therefore, keeping the compatible string is necessary to allow for future >> divergence. >> >> No one discusses here whether you need separate compatible string. >> writing bindings and all my talks are (e.g. DTS 101) are clearly expecting you. >> >> We discuss only the lack of compatibility in terms of DT, how DT sees >> compatible devices. >> >> And lack of driver code is clear indication that devices are compatible in terms >> how DT understands it. Feel encouraged to bring actual arguments in commit >> msgs in the future. >> >> Best regards, >> Krzysztof > > So the best approach is only reserve "arm,mali-valhall-csf" for now, since currently there is > no need for an additional compatible entry from a DT compatibility perspective. > We can introduce "nxp,imx952-mali" in future commits if hardware or driver differences > actually require it, and include more detailed justification in the commit message. Right? So does that mean you decided not to read writing bindings document? Best regards, Krzysztof