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Message-ID: <2a9a8a4d0fe4793fcdf4418b7e44c4c08a9c4153.1297926678.git.viresh.kumar@st.com>
Date: Thu, 17 Feb 2011 12:54:55 +0530
From: Viresh Kumar <viresh.kumar@...com>
To: <dan.j.williams@...el.com>, <linux-kernel@...r.kernel.org>
Cc: <shiraz.hashim@...com>, <amit.goel@...com>,
<armando.visconti@...com>, Viresh KUMAR <viresh.kumar@...com>
Subject: [PATCH 5/7] dw_dmac: adding support for 64 bit access width for memcpy xfers
From: Viresh KUMAR <viresh.kumar@...com>
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 5cc5abf..c40b89f 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -577,7 +577,9 @@ 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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