On 2022/04/08 1:00, Mark Brown wrote:
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.
Whether the required hardware wired is told from the user of the codec
via jack's type specified with snd_soc_card_jack_new(). The other
details live in the codec.
