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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2018-02-15 15:25:11 +0300
committerVinod Koul <vinod.koul@intel.com>2018-03-01 11:44:27 +0300
commit5b4a68952a89e7decf4ff5e86406975cc730575d (patch)
treecb7b84670b9966eaf62b4820c3cb098944b44cfc /drivers/dma
parent54eb5e26cbb72ba77588098385bf5f492b8323ae (diff)
downloadlinux-5b4a68952a89e7decf4ff5e86406975cc730575d.tar.xz
dmaengine: qcom: bam_dma: disable runtime pm on remote controlled
Remotely controlled BAM instance should not do any power management from CPU side, as cpu can not reliably say if the BAM is busy or not. Disable it for such instances. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/qcom/bam_dma.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index 6919f501b9f3..d29275b97e84 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -1333,6 +1333,11 @@ static int bam_dma_probe(struct platform_device *pdev)
if (ret)
goto err_unregister_dma;
+ if (bdev->controlled_remotely) {
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+ }
+
pm_runtime_irq_safe(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, BAM_DMA_AUTOSUSPEND_DELAY);
pm_runtime_use_autosuspend(&pdev->dev);
@@ -1416,7 +1421,8 @@ static int __maybe_unused bam_dma_suspend(struct device *dev)
{
struct bam_device *bdev = dev_get_drvdata(dev);
- pm_runtime_force_suspend(dev);
+ if (!bdev->controlled_remotely)
+ pm_runtime_force_suspend(dev);
clk_unprepare(bdev->bamclk);
@@ -1432,7 +1438,8 @@ static int __maybe_unused bam_dma_resume(struct device *dev)
if (ret)
return ret;
- pm_runtime_force_resume(dev);
+ if (!bdev->controlled_remotely)
+ pm_runtime_force_resume(dev);
return 0;
}