[alsa-devel] [PATCH v5] ASoC: cs53l30: Add support for Cirrus Logic CS53L30

[Mark Brown]

On Tue, May 17, 2016 at 04:43:33PM -0700, Nicolin Chen wrote:

> In this case, would it be more appropriate to create one single DAI
> with channels_max = 4 over here?

Yes.

> Another question is for its TDM support. This chip outputs 4-channel
> data on two data output pins (SDOUT1 and SDOUT2) as normal mode; it
> outputs 4-channel data on one data output pin (SDOUT1) as TDM mode.
> However, the mode selection for a 4-channel recording should depend
> on the hardware design: whether the SDOUT2 is connected or not. So
> I am wondering if there is a common way or existing way to indicate
> this hardware design. Or just by simply defining a new DT property?

That's a really rare thing to have as an option, most things either do
TDM or parallel data signals but not both.
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