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>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 2b0d5e99ae71..e5d97bf9264a 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;