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

[Mengdong Lin]

On 12/15/2015 07:23 PM, Mark Brown wrote:
> 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.

Got it. Thanks!

>
>> 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.
>

Can we remove this rtd array if current driver does not need the stub?

For the replacement of aux_dev by aux_component, can we define like below?

struct snd_soc_aux_component {
	const char *comp_name; ... no longer assume they're only codecs
	const char *comp_of_node;

	/* machine specific init */
	int (*init)(struct snd_soc_component *componnent);
};

The ASoC can use the comp_name or comp_of_node to find the components 
and probe them.

Thanks
Mengdong