linux-kernel - Re: [PATCH 2/2] ASoC: dt-bindings: simple-card: Document new DAI flags playback-only/capture-only

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Message-ID: <20230811191236.GA3937407-robh@kernel.org>
Date:   Fri, 11 Aug 2023 13:12:36 -0600
From:   Rob Herring <robh@...nel.org>
To:     Daniel Baluta <daniel.baluta@....nxp.com>
Cc:     broonie@...nel.org, alsa-devel@...a-project.org,
        kuninori.morimoto.gx@...esas.com, spujar@...dia.com,
        tiwai@...e.com, perex@...ex.cz, linux-kernel@...r.kernel.org,
        linux-imx@....com, devicetree@...r.kernel.org,
        daniel.baluta@...il.com
Subject: Re: [PATCH 2/2] ASoC: dt-bindings: simple-card: Document new DAI
 flags playback-only/capture-only

On Tue, Aug 01, 2023 at 11:24:33AM +0300, Daniel Baluta wrote:
> From: Daniel Baluta <daniel.baluta@....com>
> 
> Document new playback-only and capture-only flags which can be used when
> dai link can only support just one direction: playback or capture but
> not both.
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> ---
>  Documentation/devicetree/bindings/sound/simple-card.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml
> index 59ac2d1d1ccf..1bf331f095a4 100644
> --- a/Documentation/devicetree/bindings/sound/simple-card.yaml
> +++ b/Documentation/devicetree/bindings/sound/simple-card.yaml
> @@ -27,6 +27,14 @@ definitions:
>      description: dai-link uses bit clock inversion
>      $ref: /schemas/types.yaml#/definitions/flag
>  
> +  playback-only:
> +    description: dai-link is used only for playback
> +    $ref: /schemas/types.yaml#/definitions/flag
> +
> +  capture-only:
> +    description: dai-link is used only for capture
> +    $ref: /schemas/types.yaml#/definitions/flag

Wouldn't this be implicit based on limitations in the either the cpu or 
codec DAI?

Rob