Custom audio cape

Hi, I'm making a custom audio cape for BBB. The goal is to record sound using microphones.
I used tlv320aic3106 codec, modified BB-BONE-AUDI....dts.
Replaced all 3104 with 3106, swapped axr0 with axr2 (because of a mistake in my board). Enabled micbias.
Compiled, enabled it in uEnv.txt.
But there is no audio in the recordings. I can see data movement on mcasp bus on an oscilloscope. And looks like arecord is working fine. If I remove custom cape arecord is stuck (as expected).
arecord show max peak of 0% all the time. In alsamixer PGA Capture Switch turned on, PGA Capture Volume set to 105.

Attaching modified dto. [BB-BONE-AUDI-02-00A0.txt](https://github.com/beagleboard/linux/files/6821214/BB-BONE-AUDI-02-00A0.txt)