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SND_DMAENGINE_PCM_OP(9) PCM API SND_DMAENGINE_PCM_OP(9)

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.

COPYRIGHT

June 2017 Kernel Hackers Manual 4.9.