snd_dmaengine_pcm_open (9) - Linux Manuals

snd_dmaengine_pcm_open: Open a dmaengine based PCM substream

Command to display snd_dmaengine_pcm_open manual in Linux: $ man 9 snd_dmaengine_pcm_open

NAME

snd_dmaengine_pcm_open - Open a dmaengine based PCM substream

SYNOPSIS

int snd_dmaengine_pcm_open(struct snd_pcm_substream * substream, struct dma_chan * chan);

ARGUMENTS

substream

: PCM substream

chan

: DMA channel to use for data transfers

DESCRIPTION

Returns 0 on success, a negative error code otherwise.

The function should usually be called from the pcm open callback. Note that this function will use private_data field of the substream's runtime. So it is not available to your pcm driver implementation.