MLK-25465-6 dmaengine: imx-sdma: fix the long dma transfer timing grater than 2s

In case the dma transfer timing longer than 2s, sdma would be power
off so that cyclic transfer would be broken, forbid runtime auto suspend
in such case instead.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Shengjiu Wang <shengjiu.wang@nxp.com>
(cherry picked from commit 9df533ad0ab7767db7cff1293d0c8dafb599130b)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 93fbcb2..6f856ae 100644 (file)
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -975,12 +975,8 @@ static irqreturn_t sdma_int_handler(int irq, void *dev_id)
        struct sdma_engine *sdma = dev_id;
        unsigned long stat;
 
-       if (sdma->drvdata->pm_runtime)
-               pm_runtime_get_sync(sdma->dev);
-       else {
-               clk_enable(sdma->clk_ipg);
-               clk_enable(sdma->clk_ahb);
-       }
+       clk_enable(sdma->clk_ipg);
+       clk_enable(sdma->clk_ahb);
 
        stat = readl_relaxed(sdma->regs + SDMA_H_INTR);
        writel_relaxed(stat, sdma->regs + SDMA_H_INTR);
@@ -1011,13 +1007,8 @@ static irqreturn_t sdma_int_handler(int irq, void *dev_id)
                __clear_bit(channel, &stat);
        }
 
-       if (sdma->drvdata->pm_runtime) {
-               pm_runtime_mark_last_busy(sdma->dev);
-               pm_runtime_put_autosuspend(sdma->dev);
-       } else {
-               clk_disable(sdma->clk_ipg);
-               clk_disable(sdma->clk_ahb);
-       }
+       clk_disable(sdma->clk_ipg);
+       clk_disable(sdma->clk_ahb);
 
        return IRQ_HANDLED;
 }
@@ -1266,9 +1257,6 @@ static int sdma_terminate_all(struct dma_chan *chan)
        struct sdma_channel *sdmac = to_sdma_chan(chan);
        unsigned long flags;
 
-       if (sdmac->sdma->drvdata->pm_runtime)
-               pm_runtime_get_sync(sdmac->sdma->dev);
-
        spin_lock_irqsave(&sdmac->vc.lock, flags);
 
        sdma_disable_channel(chan);
@@ -1281,10 +1269,8 @@ static int sdma_terminate_all(struct dma_chan *chan)
 
        spin_unlock_irqrestore(&sdmac->vc.lock, flags);
 
-       if (sdmac->sdma->drvdata->pm_runtime) {
-               pm_runtime_mark_last_busy(sdmac->sdma->dev);
-               pm_runtime_put_autosuspend(sdmac->sdma->dev);
-       }
+       if (sdmac->sdma->drvdata->pm_runtime)
+               pm_runtime_allow(sdmac->sdma->dev);
 
        return 0;
 }
@@ -2086,17 +2072,12 @@ static void sdma_issue_pending(struct dma_chan *chan)
        unsigned long flags;
 
        if (sdmac->sdma->drvdata->pm_runtime)
-               pm_runtime_get_sync(sdmac->sdma->dev);
+               pm_runtime_forbid(sdmac->sdma->dev);
 
        spin_lock_irqsave(&sdmac->vc.lock, flags);
        if (vchan_issue_pending(&sdmac->vc) && !sdmac->desc)
                sdma_start_desc(sdmac);
        spin_unlock_irqrestore(&sdmac->vc.lock, flags);
-
-       if (sdmac->sdma->drvdata->pm_runtime) {
-               pm_runtime_mark_last_busy(sdmac->sdma->dev);
-               pm_runtime_put_autosuspend(sdmac->sdma->dev);
-       }
 }
 
 #define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1        34