Re: Problem with ALSA in 2.6.14-omap2 on OSK

[Dirk Behme <dirk.behme@de.bosch.com>]

Yves Godin wrote:
> 	It seems that something has change in the driver for the DMA in
> 2.6.14-omap2.
> 
> When I play a pure tone (ALSA driver), I ear some glitches in the audio
> every 5-10 secconds. Everithing was correct with 2.6.14-rc1.
> 
> From what I can see with a scope on the serial data sent to the codec,
> it seems that some samples (a complete buffer??) are repeated from time
> to time. It's easier to ear it when playing a pure tone (ex 1Khz).
> 
> Note that my alsa driver is slightly modified to play 24 bits audio
> samples instead of 16 bits (DMA is configured in 32 bits). 
> 
> The files from the alsa driver have not changed between 2.6.14-rc1 and
> 2.6.14-omap2. So I supposed the changes have been made to the OMAP dma
> drivers.

On 2.6.15-rc2-omap1 on OSK I can reproduce this using madplay and mp3. 
All 5-10 seconds a short part is repeated.

Any news or ideas about this?

Thanks

Dirk