Hi Igor,
Thanks for sharing link.
once loaded the driver,we got logs like below.
# dmesg | grep mqs
[ 2.964898] imx-mqs sound-mqs: fsl-mqs-dai <-> 2028000.sai mapping ok
[ 2.972353] imx-mqs sound-mqs: snd-soc-dummy-dai <-> 2034000.asrc mapping ok
[ 2.979803] imx-mqs sound-mqs: fsl-mqs-dai <-> 2028000.sai mapping ok
[ 3.191163] #0: mqs-audio
We can test with headset or any circuit we have to made?