Commit e6222263 authored by Qiao Zhou's avatar Qiao Zhou Committed by Vinod Koul
Browse files

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: default avatarQiao Zhou <zhouqiao@marvell.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent e34b731f

drivers/dma/mmp_tdma.c

+14 −5
Original line number Diff line number Diff line
@@ -148,10 +148,16 @@ static void mmp_tdma_chan_set_desc(struct mmp_tdma_chan *tdmac, dma_addr_t phys) 
					tdmac->reg_base + TDCR);

}



static void mmp_tdma_enable_chan(struct mmp_tdma_chan *tdmac)

static void mmp_tdma_enable_irq(struct mmp_tdma_chan *tdmac, bool enable)

{

	/* enable irq */

	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 dma chan */

	writel(readl(tdmac->reg_base + TDCR) | TDCR_CHANEN,

					tdmac->reg_base + TDCR);
@@ -163,9 +169,6 @@ static void mmp_tdma_disable_chan(struct mmp_tdma_chan *tdmac) 
	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 @@ static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic( 
		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 @@ static int mmp_tdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, 
	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);