[alsa-devel] IMX WM8740 I2S support

stéphane cerveau scerveau at gmail.com
Wed Sep 25 15:56:54 CEST 2013

Here is a log from the kernel:

imx-sdma imx-sdma: loaded firmware 1.1
imx-sdma imx-sdma: initialized

Best regards.


On 09/25/2013 03:12 PM, Fabio Estevam wrote:
> 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

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