diff options
| author | Mans Rullgard <mans@mansr.com> | 2016-03-18 17:24:45 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-04-13 19:06:10 +0300 |
| commit | a3e557999be74810e02be1d0c107096b7aa48ece (patch) | |
| tree | 59704e5a77a784f3b8f6e61c9d376d78f649d32a /drivers/dma/dw | |
| parent | 2a0fae025e56afbe38441d411f57667b08f44d0e (diff) | |
| download | linux-a3e557999be74810e02be1d0c107096b7aa48ece.tar.xz | |
dmaengine: dw: clear LLP_[SD]_EN bits in last descriptor of a chain
The datasheet requires that the LLP_[SD]_EN bits be cleared whenever
LLP.LOC is zero, i.e. in the last descriptor of a multi-block chain.
Make the driver do this.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/dw')
| -rw-r--r-- | drivers/dma/dw/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 23bb460fff6a..db9b6f433148 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -759,6 +759,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, lli_set(prev, ctllo, DWC_CTLL_INT_EN); prev->lli.llp = 0; + lli_clear(prev, ctllo, DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN); first->txd.flags = flags; first->total_len = len; @@ -919,6 +920,7 @@ slave_sg_fromdev_fill_desc: lli_set(prev, ctllo, DWC_CTLL_INT_EN); prev->lli.llp = 0; + lli_clear(prev, ctllo, DWC_CTLL_LLP_D_EN | DWC_CTLL_LLP_S_EN); first->total_len = total_len; return &first->txd; |