From: Javier Martin <javier.martin@vista-silicon.com>
Date: Thu, 22 Mar 2012 13:54:14 +0000 (+0100)
Subject: dmaengine: i.MX: Add support for interleaved transfers.
X-Git-Tag: v3.4-rc1~39^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f606ab897b6d7f35b57c7474424676e30457520b;p=pandora-kernel.git

dmaengine: i.MX: Add support for interleaved transfers.

i.MX2 and i.MX1 chips have the possibility to do
interleaved transfers with two constraints:
- Only one chunk can be used (i.e. only 2D transfers are allowed).
- Only 2 interleaved configurations can be applied at the same time
for all channels.

Since this patch adds a new resource 'slots_2d' which is shared
by all the DMA channels and to avoid disgustin locking BUGs, the
'lock' member has been moved to the global 'imxdma_engine' structure.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
---

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