2417260_en-US

iMX93 FIFO underruns when using SAI1 on M33

I'm using SAI1 to drive an external I2S device. 40MHz BCLK, 1.25MHz WCLK.

Boot from Linux, code running on M33 via remoteproc.

Getting FIFO underruns for the SAI1 interface.

Can't figure out why?

Did same code using SAI3 on M33 (A55 was held in uboot) and no problems.

Any ideas?

Thanks!

Audio(PDM | I2S | SAI)