lkml.org 
[lkml]   [2012]   [Jun]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 2/3] ASoC: dmaengine-pcm: Rename and deprecate snd_dmaengine_pcm_pointer
From
Date
On Mon, 2012-06-11 at 20:11 +0200, Lars-Peter Clausen wrote:
> Currently the sound dmaengine pcm helper functions implement the pcm_pointer
> callback by trying to count the number of elapsed periods. This is done by
> advancing the stream position in the dmaengine callback by one period.
> Unfortunately there is no guarantee that the callback will be called for each
> elapsed period. It may be possible that under high system load it is only called
> once for multiple elapsed periods. This patch renames the current implementation
> and documents its shortcomings and that it should not be used anymore in new
> drivers.
>
> The next patch will introduce a new snd_dmaengine_pcm_pointer which will be
> implemented based on querying the current stream position from the dma device.
>
> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>

--
~Vinod



\
 
 \ /
  Last update: 2012-06-20 13:41    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site