dmaengine: edma: Remove alignment constraint for memcpy
Despite the claim by the original commit adding the memcpy
support, eDMA does not have constraint on the alignment of src, dst
or length in increment mode.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 7eefbf1..b36dfa5 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -1324,6 +1324,7 @@
struct edma_desc *edesc;
struct device *dev = chan->device->dev;
struct edma_chan *echan = to_edma_chan(chan);
+ unsigned int width;
if (unlikely(!echan || !len))
return NULL;
@@ -1336,8 +1337,12 @@
edesc->pset_nr = 1;
+ width = 1 << __ffs((src | dest | len));
+ if (width > DMA_SLAVE_BUSWIDTH_64_BYTES)
+ width = DMA_SLAVE_BUSWIDTH_64_BYTES;
+
ret = edma_config_pset(chan, &edesc->pset[0], src, dest, 1,
- DMA_SLAVE_BUSWIDTH_4_BYTES, len, DMA_MEM_TO_MEM);
+ width, len, DMA_MEM_TO_MEM);
if (ret < 0)
return NULL;
@@ -1903,12 +1908,6 @@
dma->dev = dev;
- /*
- * code using dma memcpy must make sure alignment of
- * length is at dma->copy_align boundary.
- */
- dma->copy_align = DMAENGINE_ALIGN_4_BYTES;
-
INIT_LIST_HEAD(&dma->channels);
}