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

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

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

[Daniel Baluta]

On Wed, Jan 25, 2023 at 5:29 AM Fabio Estevam <festevam@gmail.com> wrote:
>
> 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.

Hi,

Can you also dump SAI registers ?

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

[Fabio Estevam]

Hi Daniel,

On Wed, Jan 25, 2023 at 5:43 AM Daniel Baluta <daniel.baluta@gmail.com> wrote:

> Can you also dump SAI registers ?

They also match in the working and non-working cases.

I have also tried applying your patch:
https://lore.kernel.org/lkml/20190308173904.27298-1-daniel.baluta@nxp.com/

but it did not help.

Thanks

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

[Fabio Estevam]

Hi Daniel,

On Wed, Jan 25, 2023 at 11:51 PM Fabio Estevam <festevam@gmail.com> wrote:

> They also match in the working and non-working cases.
>
> I have also tried applying your patch:
> https://lore.kernel.org/lkml/20190308173904.27298-1-daniel.baluta@nxp.com/
>
> but it did not help.

It is working now. The error was caused by an out-of-tree patch to handle MCLK.

Without such a patch, it works well.

Thanks