snd_dmaengine_pcm_open_request_chan(9) - phpMan
SND_DMAENGINE_PCM_OP(9) PCM API SND_DMAENGINE_PCM_OP(9)
NAME
snd_dmaengine_pcm_open_request_chan - Open a dmaengine based PCM substream and request
channel
SYNOPSIS
int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream * substream,
dma_filter_fn filter_fn, void * filter_data);
ARGUMENTS
substream
PCM substream
filter_fn
Filter function used to request the DMA channel
filter_data
Data passed to the DMA filter function
DESCRIPTION
Returns 0 on success, a negative error code otherwise.
This function will request a DMA channel using the passed filter function and data. 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
Kernel Hackers Manual 4.8. January 2017 SND_DMAENGINE_PCM_OP(9)
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