Re: [PATCH v3 17/20] ASoC: dt-bindings: tas2770: add flags for SDOUT pulldown and zero-fill

[James Calligeros]

On Wed, Mar 5, 2025 at 11:22 PM Rob Herring <robh@xxxxxxxxxx> wrote:
> This just feels like something common because any TDM interface may need
> to control this. It's not really a property of the chip, but requirement
> of the TDM interface.

What I'm imagining then is something like:

dai-link@0 {
    cpu {
        sound-dai = <&some_cpu>;
    };
    codec {
        sound-dai = <&some_codec>;
        dai-tdm-tx-zerofill;
        dai-tdm-tx-pulldown; /* either or, having both makes no sense */
    };
};

Codec drivers would then provide a function to set TDM TX behaviour if they
support it, and export that as a dai op for use by machine drivers
when they parse
the dai link similar to dai-tdm-tx-slot and friends. Is that close to
what you have
in mind?

Regards,
James