From e2b538a77d99706a9d2dc12925f3f8477c724dcc Mon Sep 17 00:00:00 2001 From: Kedareswara rao Appana Date: Fri, 26 Feb 2016 19:33:53 +0530 Subject: 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 Signed-off-by: Vinod Koul --- drivers/dma/xilinx/xilinx_vdma.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/dma/xilinx') 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 -- cgit v1.2.3