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: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 54f7408..3754ffa 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -256,8 +256,13 @@
* 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 @@
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);
}