Activate I2S

[LucD 0]

Dear,

I try to activate i2s on my thinkerboard 3S. 

Situation: Tinker Board 3/3S Debian 11 (kernel 5.10) V.1.0.7

Updated: /boot/config.txt

intf:i2s3_2ch=on

Direct connected i2s MEMS microphone, custom build on PCB, worked on tinkerboard S R2.0.

Pins, power and ground

Mic BCLK to pin 12
Mic DOUT to pin 38
Mic LRCL to pin 35

Updated the asound.conf to (based on chatGPT):

pcm.!default {
    type hw
    card 0
    device 0
}

ctl.!default {
    type hw
    card 0
}

alsa installed

aplay -l doesn't list capture devices

What am I missing?