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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 1ADF5C2D0D1 for ; Mon, 24 Jun 2024 08:56:26 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Trj3GrNK; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4W71zC3Tb0z3cG6 for ; Mon, 24 Jun 2024 18:56:23 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Trj3GrNK; 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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 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-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: imx , alsa-devel , Xiubo Lee , Catalin Marinas , linux-kernel , Philip-Dylan Gleonec , shengjiu wang , Rob Herring , Will Deacon , Russell King , devicetree , Conor Dooley , Liam Girdwood , Sascha Hauer , linux-sound , Nicolin Chen , Mark Brown , Fabio Estevam , Jaroslav Kysela , linux-arm-kernel , linuxppc-dev , Takashi Iwai , Pengutronix Kernel Team , Krzysztof Kozlowski , Shawn Guo Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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