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| author | Kedareswara rao Appana <appana.durga.rao@xilinx.com> | 2016-02-26 19:33:53 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-03-03 21:02:38 +0530 |
| commit | e2b538a77d99706a9d2dc12925f3f8477c724dcc (patch) | |
| tree | 069fe99fc9b6f3d35f8f5aef0b7b3e453edad26f /drivers/dma | |
| parent | 7096f36e5388beb06b80576d3ccc3a0df2760035 (diff) | |
| download | lwn-e2b538a77d99706a9d2dc12925f3f8477c724dcc.tar.gz lwn-e2b538a77d99706a9d2dc12925f3f8477c724dcc.zip | |
dmaengine: xilinx_vdma: Fix issues with non-parking mode
This patch fixes issues with the Non-parking mode(Cirular mode).
With the existing driver in cirular mode if we submit frames less than h/w
configured we simply end-up having misconfigured vdma h/w.
This patch fixes this issue by configuring the frame count register.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/xilinx/xilinx_vdma.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/xilinx/xilinx_vdma.c b/drivers/dma/xilinx/xilinx_vdma.c index 06bffec934d2..e96ff9dea40d 100644 --- a/drivers/dma/xilinx/xilinx_vdma.c +++ b/drivers/dma/xilinx/xilinx_vdma.c @@ -648,6 +648,10 @@ static void xilinx_vdma_start_transfer(struct xilinx_vdma_chan *chan) else reg &= ~XILINX_VDMA_DMACR_FRAMECNT_EN; + /* Configure channel to allow number frame buffers */ + vdma_ctrl_write(chan, XILINX_VDMA_REG_FRMSTORE, + chan->desc_pendingcount); + /* * With SG, start with circular mode, so that BDs can be fetched. * In direct register mode, if not parking, enable circular mode |