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Commit 8e8805d5 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
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dmaengine: edma: Serve cyclic (audio) channels with high priority queue 



Move the DMA channel used in cyclic mode (audio) to the highest priority
event queue which helps to reduce audio problems.
When the channel is terminated, move it back to the default queue.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent eb3fe7de

drivers/dma/edma.c

+8 −0
Original line number Diff line number Diff line
@@ -256,8 +256,13 @@ static int edma_terminate_all(struct edma_chan *echan) 
	 * echan->edesc is NULL and exit.)

	 */

	if (echan->edesc) {

		int cyclic = echan->edesc->cyclic;

		echan->edesc = NULL;

		edma_stop(echan->ch_num);

		/* Move the cyclic channel back to default queue */

		if (cyclic)

			edma_assign_channel_eventq(echan->ch_num,

						   EVENTQ_DEFAULT);

	}



	vchan_get_all_descriptors(&echan->vchan, &head);
@@ -724,6 +729,9 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic( 
			edesc->pset[i].param.opt |= TCINTEN;

	}



	/* Place the cyclic channel to highest priority queue */

	edma_assign_channel_eventq(echan->ch_num, EVENTQ_0);



	return vchan_tx_prep(&echan->vchan, &edesc->vdesc, tx_flags);

}