i.MX8MN: SAI: First playback failure, second succeeds

[Fabio Estevam]

Hi,

I am trying to get audio playback to work on i.MX8MN board with an
ES9080 DAC (with a not yet upstreamed driver).

The first playback after a POR fails most of the time (about 70%):

speaker-test -t sine -f  2000 -c 4 -F S32_LE -D hw:3

speaker-test 1.2.6

Playback device is hw:3
Stream parameters are 48000Hz, S32_LE, 4 channels
Sine wave rate is 2000.0000Hz
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 6 to 32768
Period size range from 3 to 4095
Using max buffer size 32768
Periods = 4
was set period_size = 2048
was set buffer_size = 32768
 0 - Front Left
Write error: -5,Input/output error
xrun_recovery failed: -5,Input/output error
Transfer failed: Input/output error

However, the second attempt always succeeds.

I dumped the E9080 registers and they match the good and failure cases.

Any suggestions as to where I should look?

Thanks