dmaengine: ste_dma40: set dma max seg size
Maximum DMA seg size is (0xffff x data_width). If max seg
size is not set it deafults to 64k. This results in failure
if transferring 64k in byte mode.
Large seg sizes may be supported by splitting large transfer.
Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 23c5573..f5724d9 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -344,6 +344,7 @@
int irq;
int num_phy_chans;
int num_log_chans;
+ struct device_dma_parameters dma_parms;
struct dma_device dma_both;
struct dma_device dma_slave;
struct dma_device dma_memcpy;
@@ -3362,6 +3363,13 @@
if (err)
goto failure;
+ base->dev->dma_parms = &base->dma_parms;
+ err = dma_set_max_seg_size(base->dev, STEDMA40_MAX_SEG_SIZE);
+ if (err) {
+ d40_err(&pdev->dev, "Failed to set dma max seg size\n");
+ goto failure;
+ }
+
d40_hw_init(base);
dev_info(base->dev, "initialized\n");