dmaengine/dw_dmac: Add 64 bit access width support for slave xfers on mem side
64 bit transfers are possible on both sides in slave transfers (memory as well
as peripherals). This patch adds support for it memory side 64 bit transfers.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 5d7b199..9f4310f 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -749,8 +749,14 @@
mem = sg_phys(sg);
len = sg_dma_len(sg);
- mem_width = 2;
- if (unlikely(mem & 3 || len & 3))
+
+ if (!((mem | len) & 7))
+ mem_width = 3;
+ else if (!((mem | len) & 3))
+ mem_width = 2;
+ else if (!((mem | len) & 1))
+ mem_width = 1;
+ else
mem_width = 0;
slave_sg_todev_fill_desc:
@@ -807,8 +813,14 @@
mem = sg_phys(sg);
len = sg_dma_len(sg);
- mem_width = 2;
- if (unlikely(mem & 3 || len & 3))
+
+ if (!((mem | len) & 7))
+ mem_width = 3;
+ else if (!((mem | len) & 3))
+ mem_width = 2;
+ else if (!((mem | len) & 1))
+ mem_width = 1;
+ else
mem_width = 0;
slave_sg_fromdev_fill_desc: