Samsung S5PV210 I2S DMA

Samsung S5PV210 I2S DMA

[Mike Dyer]

Hi All,

I'm attempting to play audio into a WM8960 codec attached to I2S 0 on a
Samsung S5PV210.

The DMA engine emits a lot of messages complaining of (I think) a read
fault:

dma-pl330 dma-pl330.0: Reset Channel-0 CS-20000f FTC-40000
dma-pl330 dma-pl330.0: Reset Channel-0 CS-20000f FTC-40000
...

I've had audio playing using the I2S idma driver, so I know clocks +
mixer settings are OK.  I'd like to get the external DMA working because
I also need to do capture.

Any suggestions on how to debug?

Cheers,
Mike

Re: Samsung S5PV210 I2S DMA

[Mike Dyer]

On Sat, 2013-07-06 at 16:22 +0600, Alexey Galakhov wrote:
> Hi,
> 
> > The DMA engine emits a lot of messages complaining of (I think) a read
> > fault:
> 
> > dma-pl330 dma-pl330.0: Reset Channel-0 CS-20000f FTC-40000
> > dma-pl330 dma-pl330.0: Reset Channel-0 CS-20000f FTC-40000
> 
> I'm debugging the same error right now. FTC-40000 means "Read error",
> i.e. invalid address of the DMA source block.
> 
> Regards,
> Alex

In my case it turned out the TZPC hadn't been configured properly by the
bootloader.  I had to modify to the bootloader to make sure the I2S was
non secured (it's secure by default).

Hope this helps,
Mike

Re: Samsung S5PV210 I2S DMA

[Alexey Galakhov]

On 07/22/2013 01:33 PM, Mike Dyer wrote:

> In my case it turned out the TZPC hadn't been configured properly by the
> bootloader.  I had to modify to the bootloader to make sure the I2S was
> non secured (it's secure by default).

Thank you! As I'm the one who ported the bootloader (barebox) to
S5PV210, I think I should support generic TZPC configuration in the
bootloader.

Regards,
Alex