diff options
| author | Kedareswara rao Appana <appana.durga.rao@xilinx.com> | 2017-12-07 08:24:27 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-12-18 07:07:06 +0300 |
| commit | 8d90035e379c1987d72e5eef8c6c9ed3d86a7ca1 (patch) | |
| tree | 779f22791b560a7029adf0dfc184d0bbc43caf59 /drivers/dma/xilinx | |
| parent | 3c48d62de2371b42fde436c87e64ebe18fb5f0f0 (diff) | |
| download | linux-8d90035e379c1987d72e5eef8c6c9ed3d86a7ca1.tar.xz | |
dmaengine: zynqmp_dma: Fix issues with overflow interrupt
This patch fixes the below issues.
--> Need to clear the channel data count register
when overflow interrupts occurs.
--> Reduce the log level from _info to _dbg when
overflow interrupt occurs.
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/xilinx')
| -rw-r--r-- | drivers/dma/xilinx/zynqmp_dma.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index b9b5c0ac6722..a297a2659848 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -48,6 +48,7 @@ #define ZYNQMP_DMA_SRC_START_MSB 0x15C #define ZYNQMP_DMA_DST_START_LSB 0x160 #define ZYNQMP_DMA_DST_START_MSB 0x164 +#define ZYNQMP_DMA_TOTAL_BYTE 0x188 #define ZYNQMP_DMA_RATE_CTRL 0x18C #define ZYNQMP_DMA_IRQ_SRC_ACCT 0x190 #define ZYNQMP_DMA_IRQ_DST_ACCT 0x194 @@ -513,6 +514,7 @@ static int zynqmp_dma_alloc_chan_resources(struct dma_chan *dchan) static void zynqmp_dma_start(struct zynqmp_dma_chan *chan) { writel(ZYNQMP_DMA_INT_EN_DEFAULT_MASK, chan->regs + ZYNQMP_DMA_IER); + writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE); chan->idle = false; writel(ZYNQMP_DMA_ENABLE, chan->regs + ZYNQMP_DMA_CTRL2); } @@ -524,6 +526,8 @@ static void zynqmp_dma_start(struct zynqmp_dma_chan *chan) */ static void zynqmp_dma_handle_ovfl_int(struct zynqmp_dma_chan *chan, u32 status) { + if (status & ZYNQMP_DMA_BYTE_CNT_OVRFL) + writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE); if (status & ZYNQMP_DMA_IRQ_DST_ACCT_ERR) readl(chan->regs + ZYNQMP_DMA_IRQ_DST_ACCT); if (status & ZYNQMP_DMA_IRQ_SRC_ACCT_ERR) @@ -724,7 +728,7 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data) if (status & ZYNQMP_DMA_INT_OVRFL) { zynqmp_dma_handle_ovfl_int(chan, status); - dev_info(chan->dev, "Channel %p overflow interrupt\n", chan); + dev_dbg(chan->dev, "Channel %p overflow interrupt\n", chan); ret = IRQ_HANDLED; } |