[alsa-devel] [PATCH 5/5] ASoC: The soc card can have auxiliary components

[Mark Brown]

On Tue, Dec 15, 2015 at 04:06:14PM +0800, Mengdong Lin wrote:

> I still have some basic questions:

> 1. What are the typical usages for aux_dev?
>    For CODEC<->CODEC link or external headset detection chip?

Neither, it's for analogue devices.

> 2. Why we need the rtd array 'rtd_aux' for the aux_devs?
>    If the codec has DAIs and used by a DAI link, the ASoC will create a rtd
> for the link.

There are (or were at the time) assumptions in drivers that there will
be a rtd there so it was easier to provide a stub.
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