dmaengine: mmp_tdma: add DMA_PREP_INTERRUPT flag support
add DMA_PREP_INTERRUPT flag to support no_period_wakeup, in which
user space app doesn't want audio interrupt to wake up audio threads.
Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 6ad30e2..c6bd015 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -148,10 +148,16 @@
tdmac->reg_base + TDCR);
}
+static void mmp_tdma_enable_irq(struct mmp_tdma_chan *tdmac, bool enable)
+{
+ if (enable)
+ writel(TDIMR_COMP, tdmac->reg_base + TDIMR);
+ else
+ writel(0, tdmac->reg_base + TDIMR);
+}
+
static void mmp_tdma_enable_chan(struct mmp_tdma_chan *tdmac)
{
- /* enable irq */
- writel(TDIMR_COMP, tdmac->reg_base + TDIMR);
/* enable dma chan */
writel(readl(tdmac->reg_base + TDCR) | TDCR_CHANEN,
tdmac->reg_base + TDCR);
@@ -163,9 +169,6 @@
writel(readl(tdmac->reg_base + TDCR) & ~TDCR_CHANEN,
tdmac->reg_base + TDCR);
- /* disable irq */
- writel(0, tdmac->reg_base + TDIMR);
-
tdmac->status = DMA_COMPLETE;
}
@@ -434,6 +437,10 @@
i++;
}
+ /* enable interrupt */
+ if (flags & DMA_PREP_INTERRUPT)
+ mmp_tdma_enable_irq(tdmac, true);
+
tdmac->buf_len = buf_len;
tdmac->period_len = period_len;
tdmac->pos = 0;
@@ -455,6 +462,8 @@
switch (cmd) {
case DMA_TERMINATE_ALL:
mmp_tdma_disable_chan(tdmac);
+ /* disable interrupt */
+ mmp_tdma_enable_irq(tdmac, false);
break;
case DMA_PAUSE:
mmp_tdma_pause_chan(tdmac);