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Date: Thu, 3 Mar 2011 15:47:18 +0530
From: Viresh Kumar <viresh.kumar@...com>
To: <vinod.koul@...el.com>, <dan.j.williams@...el.com>
Cc: <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <viresh.linux@...il.com>,
Viresh Kumar <viresh.kumar@...com>, <jamie@...ieiles.com>,
<armando.visconti@...com>, <shiraz.hashim@...com>,
<amit.goel@...com>, <hans-christian.egtvedt@...el.com>
Subject: [PATCH V2 05/13] dw_dmac: Adding support for 64 bit access width for memcpy xfers
Signed-off-by: Viresh Kumar <viresh.kumar@...com>
---
drivers/dma/dw_dmac.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 2b0d5e9..e5d97bf 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -583,7 +583,9 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
* We can be a lot more clever here, but this should take care
* of the most common optimization.
*/
- if (!((src | dest | len) & 3))
+ if (!((src | dest | len) & 7))
+ src_width = dst_width = 3;
+ else if (!((src | dest | len) & 3))
src_width = dst_width = 2;
else if (!((src | dest | len) & 1))
src_width = dst_width = 1;
--
1.7.2.2
--
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