dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata

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When descriptor memory is accessed through an IOMMU the DMADAR register
isn't initialized automatically from the first descriptor at beginning
of transfer by the DMAC like it should. Initialize it manually with the
destination address of the first chunk.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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Laurent Pinchart 2015-01-27 18:33:29 +02:00 • committed by Vinod Koul

parent 6a634808e3

commit 3f46306127

1 changed files with 14 additions and 0 deletions

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drivers/dma/sh/rcar-dmac.c

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