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Commit 96874b9a authored by Joel Fernandes's avatar Joel Fernandes Committed by Vinod Koul
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ARM: edma: Add function to manually trigger an EDMA channel 



Manual trigger for events missed as a result of splitting a
scatter gather list and DMA'ing it in batches. Add a helper
function to trigger a channel incase any such events are missed.

Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Acked-by: default avatarSekhar Nori <nsekhar@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 53407062

arch/arm/common/edma.c

+17 −0
Original line number Diff line number Diff line
@@ -1235,6 +1235,23 @@ void edma_resume(unsigned channel) 
}

EXPORT_SYMBOL(edma_resume);



int edma_trigger_channel(unsigned channel)

{

	unsigned ctlr;

	unsigned int mask;



	ctlr = EDMA_CTLR(channel);

	channel = EDMA_CHAN_SLOT(channel);

	mask = BIT(channel & 0x1f);



	edma_shadow0_write_array(ctlr, SH_ESR, (channel >> 5), mask);



	pr_debug("EDMA: ESR%d %08x\n", (channel >> 5),

		 edma_shadow0_read_array(ctlr, SH_ESR, (channel >> 5)));

	return 0;

}

EXPORT_SYMBOL(edma_trigger_channel);



/**

 * edma_start - start dma on a channel

 * @channel: channel being activated

include/linux/platform_data/edma.h

+2 −0
Original line number Diff line number Diff line
@@ -180,4 +180,6 @@ struct edma_soc_info { 
	const s16	(*xbar_chans)[2];

};



int edma_trigger_channel(unsigned);



#endif