diff options
| author | Per Forlin <per.forlin@stericsson.com> | 2011-10-18 18:39:47 +0200 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:02:55 +0200 |
| commit | 48d61af58c9c4257bb68425be44f1b40bed6c2a8 (patch) | |
| tree | 394995e6d03aeaea81ee77306f5a10ecfebdf07f | |
| parent | 29700821e3b9a1d7e1069aad9bfa811b8533b334 (diff) | |
dmaengine/ste_dma40: set dma max seg to 0xffff
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.
----------------
commit d49278e3351b34870cbffffc5067348a318e7b06
Author: Per Forlin <per.forlin@stericsson.com>
Date: Mon Dec 20 18:31:38 2010 +0100
dmaengine: dma40: Add support to split up large elements
----------------
This patch has been rejected or lost on kernel 3.0.
It exists on mainline kernel 3.0.
ST-Ericsson ID: 363565
ST-Ericsson FOSS-OUT ID: Trivial
ST-Ericsson Linux next: NA
Change-Id: I7c0bf09df04cb20da2164c5c40f3a0ae73e65289
Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/34405
Reviewed-by: QATOOLS
Reviewed-by: Linus WALLEIJ <linus.walleij@stericsson.com>
| -rw-r--r-- | drivers/dma/ste_dma40.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 2ed1ac3513f..751c876f373 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -345,6 +345,7 @@ 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; @@ -3358,6 +3359,13 @@ 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, 0xffff); + 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"); |