[alsa-devel] [PATCH 11/20] OMAP: McBSP: Add link DMA mode selection

Eduardo Valentin eduardo.valentin at nokia.com
Thu Jul 30 15:28:08 CEST 2009

On Thu, Jul 30, 2009 at 03:04:42PM +0200, ext Mark Brown wrote:
> On Thu, Jul 30, 2009 at 03:49:34PM +0300, Eduardo Valentin wrote:
> > It adds a new sysfs file, where the user can configure the mcbsp mode to use.
> > If the mcbsp channel is in use, it does not allow the change.
> > Than in omap_pcm_open we can call the omap_mcbsp_get_opmode to get the mode,
> > store it, than use it to implement the different modes.
> Is this really something that people would want to tweak at runtime
> (except for test purposes)?

Yes, test purposes, bug also, the same link could be sometime used for low-power
playback while sometime for low-latency processing where as accurate as
possible DMA pointer position info is needed.

Eduardo Valentin
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