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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>
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@ -48,6 +48,7 @@
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#define ZYNQMP_DMA_SRC_START_MSB 0x15C
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#define ZYNQMP_DMA_DST_START_LSB 0x160
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#define ZYNQMP_DMA_DST_START_MSB 0x164
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#define ZYNQMP_DMA_TOTAL_BYTE 0x188
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#define ZYNQMP_DMA_RATE_CTRL 0x18C
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#define ZYNQMP_DMA_IRQ_SRC_ACCT 0x190
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#define ZYNQMP_DMA_IRQ_DST_ACCT 0x194
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@ -513,6 +514,7 @@ static int zynqmp_dma_alloc_chan_resources(struct dma_chan *dchan)
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static void zynqmp_dma_start(struct zynqmp_dma_chan *chan)
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{
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writel(ZYNQMP_DMA_INT_EN_DEFAULT_MASK, chan->regs + ZYNQMP_DMA_IER);
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writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE);
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chan->idle = false;
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writel(ZYNQMP_DMA_ENABLE, chan->regs + ZYNQMP_DMA_CTRL2);
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}
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@ -524,6 +526,8 @@ static void zynqmp_dma_start(struct zynqmp_dma_chan *chan)
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*/
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static void zynqmp_dma_handle_ovfl_int(struct zynqmp_dma_chan *chan, u32 status)
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{
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if (status & ZYNQMP_DMA_BYTE_CNT_OVRFL)
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writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE);
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if (status & ZYNQMP_DMA_IRQ_DST_ACCT_ERR)
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readl(chan->regs + ZYNQMP_DMA_IRQ_DST_ACCT);
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if (status & ZYNQMP_DMA_IRQ_SRC_ACCT_ERR)
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@ -724,7 +728,7 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data)
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if (status & ZYNQMP_DMA_INT_OVRFL) {
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zynqmp_dma_handle_ovfl_int(chan, status);
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dev_info(chan->dev, "Channel %p overflow interrupt\n", chan);
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dev_dbg(chan->dev, "Channel %p overflow interrupt\n", chan);
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ret = IRQ_HANDLED;
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}
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