Hi,

now after the SAI MCLK has been enabled on the iMX6UL in the mainstream kernel I'm having difficulties getting the ASRC work. The default pcm device is the SAI-codec link. That if used does not activate the ASRC. If I use the second pcm device the error message "fsl-sai 202c000.sai: isr: Transmit underrun detected" repeats forever. In /proc/asound only the HiFi-ASRC-FE is present and not the HiFi-ASRC-BE.

Any idea how to get it working and/or how to debug this?

Thanks! Petr