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Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sLfUI-0000000G8xf-3xwq; Mon, 24 Jun 2024 08:55:47 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sLfUD-0000000G8wg-1se1 for linux-arm-kernel@lists.infradead.org; Mon, 24 Jun 2024 08:55:42 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id EE51660917; Mon, 24 Jun 2024 08:55:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05AB2C32782; Mon, 24 Jun 2024 08:55:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719219339; bh=GZdM7RgAiulGjt8VwbxLG+6rinyzS20ZKJ2DX8G/7DA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Trj3GrNKUfHKTAjwPPQW79NqukdD4xt/4ta/5b0rD6NUqDz+ZiT898NL5vostu/ug yZuBQsoaSZI8FNDvmJCMLmCpGwlCng/ZzollweZwlCP0OpuTT8kk0k177VZxOxRwke rHC4HnCDBdT140Eplr/JH654xdjrTX5h/m5gt9oB6JgsEkZ5IxvBQcharKmho45Rmf 2GBzqIPmFOsIE2T88V/3w54m6GBDJcsd7gAWw9TmZSRbQ+RQo7KAkkrUR76Vr3N12B J2Q1SulPaP/GB4xN+6iutsEV0G38xwq6LxfJb8Pyulxe2Zj+NSJNLoGL1yKJ7mYI3X aSLB2Kfeh54Kw== Message-ID: <42b32958-89ee-43b6-96d1-f3e18c7d8955@kernel.org> Date: Mon, 24 Jun 2024 10:55:31 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCHv5 7/9] ASoC: dt-bindings: imx-audio-spdif: remove binding To: Elinor Montmasson Cc: Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Fabio Estevam , Russell King , Catalin Marinas , Will Deacon , Jaroslav Kysela , Takashi Iwai , shengjiu wang , Xiubo Lee , Nicolin Chen , Pengutronix Kernel Team , linux-sound , devicetree , imx , linux-arm-kernel , linux-kernel , alsa-devel , linuxppc-dev , Philip-Dylan Gleonec References: <20240620132511.4291-1-elinor.montmasson@savoirfairelinux.com> <20240620132511.4291-8-elinor.montmasson@savoirfairelinux.com> <17a0efe3-72fa-4d13-b3b0-90e6640308f3@kernel.org> <1566099232.1714447.1719219107779.JavaMail.zimbra@savoirfairelinux.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240624_015541_658985_F2A5B808 X-CRM114-Status: GOOD ( 15.27 ) 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 24/06/2024 10:51, Elinor Montmasson wrote: > From: "Krzysztof Kozlowski" > Sent: Sunday, 23 June, 2024 13:09:33 >> On 20/06/2024 15:25, Elinor Montmasson wrote: >>> imx-audio-spdif was merged into the fsl-asoc-card driver, and therefore >>> removed. >> >> So what happens with all existing users (e.g. DTS)? They become >> invalid/not supported? > > > Next commits, 8/9 and 9/9, update all DTS files that currently use > the "fsl,imx-audio-spdif" compatible. You mean in-tree. I mean all users, in- and out-of-tree. Other projects. > From the users point of view, currently configured spdif audio cards > will behave just the same. > > >> After quick look, I do not see backwards compatibility in the driver and >> above commit msg tells me nothing about ABI break. > > > For the next version I will state in this commit message the upcoming modifications to DTS > and compatibility, why it will be done, and that support for existing DTS is not dropped. > > Previous `imx-spdif` driver used the dummy codec instead of > using declared spdif codecs. It was discussed in previous version of this contribution > that using the dummy codec isn't good practice. So one to one backward compatibility > isn't really possible. Heh, that's not good. This is improvement, cleanup. While it is important and useful, it should also not break existing users. Best regards, Krzysztof