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Date: Wed, 16 Jul 2014 15:29:21 +0300 From: Peter Ujfalusi <peter.ujfalusi@...com> To: <nsekhar@...com>, <joelf@...com>, <vinod.koul@...el.com> CC: <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, <davinci-linux-open-source@...ux.davincidsp.com>, <dmaengine@...r.kernel.org>, <tglx@...utronix.de> Subject: [PATCH 2/2] dma: 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@...com> --- drivers/dma/edma.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index d5017abcf7cb..69f1f5250120 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -723,10 +723,10 @@ 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; } /* Place the cyclic channel to highest priority queue */ -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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