Commit ccffa387 authored Sep 14, 2012 by Peter Ujfalusi Committed by Mark Brown Sep 22, 2012

dmaengine: omap: Support for element mode in cyclic DMA



When src_maxburst/dst_maxburst is set to 0 by the users of cyclic DMA
(mostly audio) indicates that we should configure the omap DMA to element
sync mode instead of packet mode.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

parent c912fa91

drivers/dma/omap-dma.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -413,7 +413,10 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic(
		d->dev_addr = dev_addr;
		d->fi = burst;
		d->es = es;
		if (burst)
		d->sync_mode = OMAP_DMA_SYNC_PACKET;
		else
		d->sync_mode = OMAP_DMA_SYNC_ELEMENT;
		d->sync_type = sync_type;
		d->periph_port = OMAP_DMA_PORT_MPUI;
		d->sg[0].addr = buf_addr;

Admin message