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Commit a2826e66 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Vinod Koul
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dmaengine: idma64: clear LLP_[SD]_EN bits in last descriptor 



The datasheet requires that the user must clear LLP_[SD]_EN bits whenever
LLP.LOC is zero, i.e. in the last descriptor of a multi-block chain.

Make the driver do this.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 92e963f5

drivers/dma/idma64.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -289,6 +289,9 @@ static void idma64_desc_fill(struct idma64_chan *idma64c, 




	/* Trigger an interrupt after the last block is transfered */

	/* Trigger an interrupt after the last block is transfered */

	lli->ctllo |= IDMA64C_CTLL_INT_EN;

	lli->ctllo |= IDMA64C_CTLL_INT_EN;



	/* Disable LLP transfer in the last block */

	lli->ctllo &= ~(IDMA64C_CTLL_LLP_S_EN | IDMA64C_CTLL_LLP_D_EN);

}

}





static struct dma_async_tx_descriptor *idma64_prep_slave_sg(

static struct dma_async_tx_descriptor *idma64_prep_slave_sg(