Mark, could you please help me to understand the UCM naming scheme that ALSA uses..
About a year ago I tried to complain to Jaroslav Kysela in a comment to the UCM change [1] that it should be breaking the naming scheme of Tegra UCMs, but haven't got a meaningful reply and moved on to other things.
[1] https://github.com/alsa-project/alsa-ucm-conf/commit/8ff2d50745efbb6959324f6...
Today I noticed that the naming scheme changed again and I still don't understand what to do about it.
I have two devices:
1. Acer Picasso tablet that uses "Acer Iconia Tab A500 WM8903" for the card model name.
2. Google Nexus 7 that uses "ASUS Google Nexus 7 ALC5642".
Previously UCMs were picked up by pulseaudio from these paths:
1. /usr/share/alsa/ucm2/Acer Iconia Tab A500 WM8903/ 2. /usr/share/alsa/ucm2/ASUS Google Nexus 7 ALC5642/
Now the lookup paths are changed to:
1. /usr/share/alsa/ucm2/Acer_Iconia_Tab/ 2. /usr/share/alsa/ucm2/ASUS_Google_Nex/
Strace shows that pulseaudio searches UCMs only at these paths.
The output of /proc/asound/cards:
0 [WM8903 ]: Acer_Iconia_Tab - Acer Iconia Tab A500 WM8903 Acer Iconia Tab A500 WM8903
0 [ALC5642 ]: ASUS_Google_Nex - ASUS Google Nexus 7 ALC5642 ASUS Google Nexus 7 ALC5642
IIUC, the "ucm2/Tegra/codec_name" scheme [2] that the current ALSA UCM uses simply doesn't work at all. Is there anything on the kernel side that I could change to get a working naming scheme? If yes, I may try to do something about it in the v2, thanks in advance.
[2] https://github.com/alsa-project/alsa-ucm-conf/tree/master/ucm2/Tegra