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 (file)
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -344,6 +344,7 @@ struct d40_base {
        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 @@ static int __init d40_probe(struct platform_device *pdev)
        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");