Comment 50 for bug 1609750

A solution was found at GitHub https://github.com/GalliumOS/galliumos-distro/issues/317#issuecomment-322658720 to make the sound work on CYAN hardware. I tested for my computer and it works.

Basically there is a patch needed to the kernel, sound codec ts3a227e and intel board cht_bsw_max98090_ti:

https://github.com/GalliumOS/galliumos-distro/files/1226989/cyan-audio-driver-fix.patch.txt

(basically there should be nothing new here compared to other patchs posted here previously)

Then ALSA UCM files from ChromiumOS tree should be used:

https://chromium.googlesource.com/chromiumos/third_party/adhd/+/master/ucm-config/cyan/chtmax98090

They should be put in /usr/share/alsa/ucm/chtmax98090/

A patch is needed in the UCM files:

https://github.com/GalliumOS/galliumos-distro/files/1226991/ucm-mod-to-enable-audio.patch.txt

Then, the hardware is recognized but audio doesn't work. Tweaking the ALSA settings makes it work.

Here:

https://github.com/GalliumOS/galliumos-distro/issues/317#issuecomment-323477943

There is a asound.state file to download to set the mixer settings of the audio card to the correct settings so audio works:

https://github.com/GalliumOS/galliumos-distro/files/1235825/asound.state.txt

Basically: alsactl -f downloaded/asound.state.txt restore 1 (where 1 is the number of the ALSA device) should set the settings required so audio works.

- Speakers are working
- Headset is working (detection does not work)
- Internal mic is working
- the rest is still untested (headset microphone)

Now that it works, what do we need to get this shipped?