On Wed, 2011-07-06 at 01:07 +0530, Mark Brown wrote:
No, that's not a user visible control that's part of the internal DAPM power management stuff. You're looking for struct snd_kcontrol_new stuff.
Oh, that's correct. You may be suggesting something similar to what is done in sound/soc/codecs/wm8985.c for "Equalizer Function", i.e. using SOC_xxx_EXT version for defining custom control and putting condition checks in respective "_put()" function.
The state of another control is one example of a dynamic source of information.
Can you point me to any example that shows correct way to inquire state/value of a custom control? I guess snd_soc_get_xxx() functions need to be used here but I could find only handful of usages of these functions in entire sound/soc/codecs dir.