Re: [RFC v2] dmaengine: omap-dma: Start DMA without delay for cyclic channels

Russell King - ARM Linux
2013-04-08T17:10:37Z

On Mon, Apr 08, 2013 at 09:11:04AM +0200, Peter Ujfalusi wrote:
> Russell,
>
> On 04/03/2013 01:17 PM, Peter Ujfalusi wrote:
> > cyclic DMA is only used by audio which needs DMA to be started without a
> > delay.
> > If the DMA for audio is started using the tasklet we experience random
> > channel switch (to be more precise: channel shift).
> >
> > Reported-by: Peter Meerwald <pmeerw@pmeerw.net>
> > Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> > ---
> > Hi Russell,
> >
> > Instead of removing the tasklet we can identify the DMA channel used by audio
> > based on the cyclic flag of the channel.
> > I think this can be used as a short term solution to fix the audio channel shift
> > issue and later when we have the dynamic DMA channel allocation we can adjust
> > the code.
>
> Could you, please look at this patch?

Now that I'm back from a short 4 day break, then yes, and the answer is
that it's fine. Who's handling the patch?