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