Re: [PATCH] ASoC: rt5682: Add jack kcontrol

From: Mark Brown
Date: Thu Apr 07 2022 - 12:01:09 EST

On Fri, Apr 08, 2022 at 12:46:04AM +0900, Akihiko Odaki wrote:
> On 2022/04/08 0:09, Mark Brown wrote:

> > Why not use DAPM for the jack? Note that normally the jack is part of
> > the machine driver not the CODEC - there's no way the CODEC can know how
> > it's been wired in on any given system.

> It seems it is an unsual case where the codec knows the source of the jack.
> RT5682 has interrupts and registers for the jack; see e.g.
> rt5682_button_detect in sound/soc/codecs/rt5682.c for details.

That bit is very common but there's still machine specific aspects - is
the required hardware wired up, if it is wired up how exactly are things
wired (separate microphone jack, headset jack, one of many jacks?). A
lot of the machine driver part of things is about labeling things so
that it can be displayed in a way that's easy to connect to the physical
system. Generally the machine driver would define a jack and then
connect the CODEC to it.

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