Ubuntu for ac100 uses ucm config (placed in /usr/share/alsa/ucm/) for audio
device (thanks to ogra!).
So I suppose we just need to add few lines to the config to enable internal mic
(dmic):
cset "name='DMIC En Capture Switch' on"
cset "name='DMIC PreFilter Capture Switch' on"
cset "name='DMICL Mix DMICL2ADC Capture Switch' on"
cset "name='I2SOut Mux' 'ADC LR'"
cset "name='DMIC Boost Volume' 100,100"
cset "name='Rec Capture Volume' 100,100"
I'm not sure about Volume values (I don't have my ac100 with me and can't check
what values are good - very high values can produse noise).
Useful links:
http://ac100.wikispaces.com/alsa_ucm
http://ac100.grandou.net/mixer_settings#recording_sound_from_integrated_dmic
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https://bugs.launchpad.net/bugs/1046412
Title:
[tegra-alc5632 - tegra-alc5632, recording] The default settings should
allow recording, or it should be easy to configure
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