tree 0283125bda8f59641d339c480256b0322607205d
parent 665ebe926e7b714369b5329d48745bfef17db512
author Tushar Behera <tushar.behera@linaro.org> 1400491433 +0530
committer Takashi Iwai <tiwai@suse.de> 1400491884 +0200

ALSA: pcm_dmaengine: Add check during device suspend

Currently snd_dmaengine_pcm_trigger() calls dmaengine_pause()
unconditinally during device suspend. In case where DMA controller
doesn't support PAUSE/RESUME functionality, this call is not able
to stop the DMA controller. In this scenario, audio playback doesn't
resume after device resume.

Calling dmaengine_pause/dmaengine_terminate_all conditionally fixes
the issue.

It has been tested with audio playback on Samsung platform having
PL330 DMA controller which doesn't support PAUSE/RESUME.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>