The BDW audio firmware DSP manages the DMA and the DMA cannot be
stopped exactly at the end of the playback stream. This means
stale samples may be played at PCM stop unless the driver copies
silence to the subsequent periods.
Signed-off-by: NLibin Yang <libin.yang@intel.com>
Reviewed-by: NLiam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>