Tool/software:
I've been trying to get audio working properly on a Legion 9 16IRX9.
If I use the script from https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1282089/tas2781-tas2781 using i2c bus 1 then just the left speaker will work.
Here's some diagnostic info asked for in the other thread:
Also the subsystem_id given at /sys/class/sound/hwC1D0/subsystem_id is 0x17aa3d34.