参照元†
- dma_filter_fn filter_fn
- void *filter_data
返り値†
/**
* snd_dmaengine_pcm_request_channel - Request channel for the dmaengine PCM
* @filter_fn: Filter function used to request the DMA channel
* @filter_data: Data passed to the DMA filter function
*
* Returns NULL or the requested DMA channel.
*
* This function request a DMA channel for usage with dmaengine PCM.
*/
struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn,
void *filter_data)
{
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dma_cap_set(DMA_CYCLIC, mask);
return dma_request_channel(mask, filter_fn, filter_data);
}
EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_request_channel);
コメント†