Here is a log from the kernel:
imx-sdma imx-sdma: loaded firmware 1.1 imx-sdma imx-sdma: initialized
Best regards.
Stéphane
On 09/25/2013 03:12 PM, Fabio Estevam wrote:
On Wed, Sep 25, 2013 at 10:08 AM, stéphane cerveau scerveau@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