[alsa-devel] [PATCH 0/7] Kirkwood ASoC updates

[Russell King - ARM Linux]

On Thu, Jun 26, 2014 at 08:10:12PM +0200, Andrew Lunn wrote:
> On Thu, Jun 26, 2014 at 03:22:31PM +0100, Russell King - ARM Linux wrote:
> > Mark,
> > 
> > Here are a set of patches I've had for a while as part of my DPCM work.
> > I think it's worth getting these merged.
> 
> Hi Russell, Mark
> 
> I tested simple playback of WAV and MP3 files on a Kirkwood based HP
> T5325 machine. No obvious regressions.
> 
> Tested-by: Andrew Lunn <andrew at lunn.ch>
> 
> > Patch 7 adds NO_PERIOD_WAKEUP support for kirkwood, permitting
> > interrupt-less operation.
> 
> When using mpg123 to play back mp3 files, i get about 9 interrupts per
> second for kirkwood-i2s. Does this sound right?

Whether this feature is taken advantage of depends on the application.
For example, with pulseaudio, I get:

 21:          0  main-interrupt-ctrl  21  kirkwood-i2s


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