linux-kernel - Re: [PATCHv5 8/9] arm64: dts: imx8m: update spdif sound card node properties

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Date: Sun, 23 Jun 2024 13:10:48 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Elinor Montmasson <elinor.montmasson@...oirfairelinux.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
 Russell King <linux@...linux.org.uk>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 Shengjiu Wang <shengjiu.wang@...il.com>, Xiubo Li <Xiubo.Lee@...il.com>,
 Nicolin Chen <nicoleotsuka@...il.com>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>,
 linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
 linuxppc-dev@...ts.ozlabs.org,
 Philip-Dylan <philip-dylan.gleonec@...oirfairelinux.com>
Subject: Re: [PATCHv5 8/9] arm64: dts: imx8m: update spdif sound card node
 properties

On 20/06/2024 15:25, Elinor Montmasson wrote:
> Following merge of imx-spdif driver into fsl-asoc-card:
> * update properties to match those used by fsl-asoc-card.
> * S/PDIF in/out dummy codecs must now be declared explicitly, add and
>   use them.
> 
> These modifications were tested only on an imx8mn-evk board.

So new DTS will not work on old kernel... Can you at least explain why
this is needed and what benefits this make? You change hardware
description, so whatever you merged in drivers is not really relevant, I
would say.


Best regards,
Krzysztof