dmaengine: edma: Support to suppress the period interrupts in cyclic mode

If the client (audio) does not request interrupts for every period we can
disable them.
With updated audio driver stack we can play audio w/o the need to process
any edma interrupts.

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 8e400c0f35294840e5427d3348973d32eaed0d02..54f7408e14efad8c17563ffab517d29fd230c9ab 100644 (file)
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -718,10 +718,10 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic(
                edesc->absync = ret;
 
                /*
-                * Enable interrupts for every period because callback
-                * has to be called for every period.
+                * Enable period interrupt only if it is requested
                 */
-               edesc->pset[i].param.opt |= TCINTEN;
+               if (tx_flags & DMA_PREP_INTERRUPT)
+                       edesc->pset[i].param.opt |= TCINTEN;
        }
 
        return vchan_tx_prep(&echan->vchan, &edesc->vdesc, tx_flags);