[alsa-devel] IMX WM8740 I2S support

[Fabio Estevam]

On Wed, Sep 25, 2013 at 10:08 AM, stéphane cerveau <scerveau at gmail.com> wrote:
> Dear all,
>
> I'm currently working on supporting WM8740 device software configured with
> imx6q system.
> For now my driver seems to be configured correctly. The playback is launched
> but i get:
>  ALSA sound/core/pcm_lib.c:1822 playback write error (DMA or IRQ trouble?
> write error: Input/output error

This may indicate that you are missing the SDMA firmware for the mx6.
(linux/firmware/sdma/sdma-imx6q.bin)

Starting on 3.12-rc1 you don't need the SDMA firmware for audio
playback anymore.

So I would suggest one of the above methods.

Regards,

Fabio Estevam