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authorViresh Kumar <viresh.kumar@st.com>2011-03-03 15:47:18 +0530
committerVinod Koul <vinod.koul@intel.com>2011-03-07 01:12:27 +0530
commita02274564dd78f7edde3c9ff197ed44f2f8a5a81 (patch)
treeffbce0c15b05ea36a1fb2470ad5ab573ba175f98 /drivers/dma
parent569432efa7975f5795efb8142134f5a098942381 (diff)
downloadop-kernel-dev-a02274564dd78f7edde3c9ff197ed44f2f8a5a81.zip
op-kernel-dev-a02274564dd78f7edde3c9ff197ed44f2f8a5a81.tar.gz
dw_dmac: Adding support for 64 bit access width for memcpy xfers
Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dw_dmac.c4
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;
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