Comment # 49 on bug 1171492 from Gabriele Tettamanzi

Second tentative: moved my ucmV1 profile to /usr/share/alsa/ucm2/ and added the
Syntax 2 line at the top of chtmax98090.conf, rebooted: same results as first
tentative.

Third tentative: removed ucmv1 profile and added the ucmV2 profile from your
patch in /usr/share/alsa/ucm2/, rebooted:
- speakers working 
- headphone working
- internal mic working
- headset mic not working, the execution of:

alsaucm -c chtmax98090 set _verb HiFi set _enadev HeadsetMic

gives the following error:

ALSA lib main.c:392:(execute_sequence) cdev is not equal for playback and
capture!
alsaucm: error failed to set _enadev=HeadsetMic: Invalid argument

Great job Takashi, it looks very close to be fixed!