Interesting find! I am wondering whether this might have something to do with the issue I have with the TRRS microphone in on the A311D: No input device selectable for wired headset plugged into TRRS port - #13 by doctorhoo
But I suspect that the wrong value (i2c3 vs i2c2) would make the entire sound chip non-functional?
Sound in general works for me, so I could verify the correct value on my system. How do I get this from the current device tree? I am not really sure how to read what dtc dumps at me..