Messages in this thread Patch in this message | | | From | Sinan Kaya <> | Subject | [PATCH 1/2] dmaengine: qcom_hidma: disable/enable IRQs on pause/resume | Date | Sat, 25 Mar 2017 19:04:02 -0400 |
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Once the channels are stopped, disable interrupts to make sure no new HW interaction can happen.
Similarly, re-enable the interrupts only if we know that channel is operational again.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org> --- drivers/dma/qcom/hidma_ll.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c index 6645bdf..1530a66 100644 --- a/drivers/dma/qcom/hidma_ll.c +++ b/drivers/dma/qcom/hidma_ll.c @@ -499,6 +499,9 @@ int hidma_ll_enable(struct hidma_lldev *lldev) lldev->trch_state = HIDMA_CH_ENABLED; lldev->evch_state = HIDMA_CH_ENABLED; + /* enable irqs */ + writel(ENABLE_IRQS, lldev->evca + HIDMA_EVCA_IRQ_EN_REG); + return 0; } @@ -596,6 +599,9 @@ int hidma_ll_disable(struct hidma_lldev *lldev) lldev->trch_state = HIDMA_CH_SUSPENDED; lldev->evch_state = HIDMA_CH_SUSPENDED; + + /* disable interrupts */ + writel(0, lldev->evca + HIDMA_EVCA_IRQ_EN_REG); return 0; } -- 1.9.1
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