Name
snd_dmaengine_pcm_trigger — 
     dmaengine based PCM trigger implementation
 
Synopsis
| int snd_dmaengine_pcm_trigger ( | struct snd_pcm_substream * substream, | 
|  | int cmd ); | 
 
Arguments
- substream
- 
     PCM substream
     
- cmd
- 
     Trigger command
     
Description
   Returns 0 on success, a negative error code otherwise.
   
   This function can be used as the PCM trigger callback for dmaengine based PCM
   driver implementations.