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authorQiao Zhou <zhouqiao@marvell.com>2014-09-10 12:40:48 +0400
committerVinod Koul <vinod.koul@intel.com>2014-09-11 09:17:44 +0400
commite6222263124daae6be4b38b856af352667d95929 (patch)
tree1d77847d2db9fab5e7c4f49efd1e7d26d8f899d4 /drivers/dma/mmp_tdma.c
parente34b731faa7d12d3681187968ef899747e4feb55 (diff)
downloadlinux-e6222263124daae6be4b38b856af352667d95929.tar.xz
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>
Diffstat (limited to 'drivers/dma/mmp_tdma.c')
-rw-r--r--drivers/dma/mmp_tdma.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 6ad30e2c5038..c6bd015b7165 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -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_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 @@ 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);