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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 channelSYNOPSIS¶
int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream * substream, dma_filter_fn filter_fn, void * filter_data);
ARGUMENTS¶
substreamPCM 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¶
April 2019 | Kernel Hackers Manual 4.9. |