linux-kernel - Re: [PATCH 2/4] ASoC: dt-bindings: mediatek,mt8188-mt6359: Update DAI link node pattern

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Message-ID: <j5qw52grlce63mccduvryx467h4hvcnqrxrova74d52izq3g5r@wjiflssmq6a5>
Date: Sun, 27 Oct 2024 21:56:44 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Fei Shao <fshao@...omium.org>
Cc: Mark Brown <broonie@...nel.org>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Conor Dooley <conor+dt@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Liam Girdwood <lgirdwood@...il.com>, 
	Matthias Brugger <matthias.bgg@...il.com>, Rob Herring <robh@...nel.org>, 
	Trevor Wu <trevor.wu@...iatek.com>, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org, linux-sound@...r.kernel.org
Subject: Re: [PATCH 2/4] ASoC: dt-bindings: mediatek,mt8188-mt6359: Update
 DAI link node pattern

On Fri, Oct 25, 2024 at 06:44:42PM +0800, Fei Shao wrote:
> The associated machine driver is not dependent on the format of DAI link
> node names. This means we are allowed to use more descriptive names
> instead of indices without impacting functionality.
> 
> Update the binding to accept arbitrary DAI link names with a "-dai-link"
> suffix. This is the common pattern used by the target (MT8188) and other
> (MT8195, MT8186 etc.) MediaTek-based Chromebooks.

We do not want arbitrary names. Why for example green-batman-dai-link
should be correct? The existing pattern looks wrong. Please read DT spec
and chapter about recommended names.


> 
> Signed-off-by: Fei Shao <fshao@...omium.org>
> ---
> 
>  .../devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml     | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml
> index 701cedfa38d2..2da34b66818f 100644
> --- a/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml
> +++ b/Documentation/devicetree/bindings/sound/mediatek,mt8188-mt6359.yaml
> @@ -40,7 +40,7 @@ properties:
>        name defined in the machine driver.
>  
>  patternProperties:
> -  "^dai-link-[0-9]+$":
> +  ".*-dai-link$":

This breaks existing users.

>      type: object
>      description:
>        Container for dai-link level properties and CODEC sub-nodes.
> @@ -112,7 +112,7 @@ examples:
>              "Headphone", "Headphone L",
>              "Headphone", "Headphone R",
>              "AIN1", "Headset Mic";
> -        dai-link-0 {
> +        hdmi-dai-link {

No. Not really justified.

Best regards,
Krzysztof