19 Jun
2017
19 Jun
'17
10:03 a.m.
On Mon, Jun 19, 2017 at 11:52:37AM +0530, Subhransu S. Prusty wrote:
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
Add new hw_params flag to explicitly tell driver that rewinds will never be used. This can be used by low-level driver to optimize DMA operations and reduce power consumption. Use this flag only when data written in ring buffer will never be invalidated, e.g. any update of appl_ptr is final.
Note that the update of appl_ptr include both a read/write data operation as well as snd_pcm_forward() whose behavior is not modified.
Reviewed-By: Vinod Koul vinod.koul@intel.com
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~Vinod