From: "kaiwei.liu" <kaiwei.liu@xxxxxxxxxx>
The DMA doesn't support device suspend/resume before, now
some modules using DMA have add device suspend/resume which
may invalidate the DMA runtime suspend/reusume mechanism and
result in abnormal DMA suspend/resume. So here add relative
interface for DMA device suspend/resume.
Signed-off-by: kaiwei.liu <kaiwei.liu@xxxxxxxxxx>
---
drivers/dma/sprd-dma.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 08fcf1ec368c..0fa950dfa4f0 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -1291,10 +1291,30 @@ static int __maybe_unused sprd_dma_runtime_resume(struct device *dev)
return ret;
}
+static int sprd_dma_suspend_noirq(struct device *dev)
+{
+ if ((pm_runtime_status_suspended(dev)) ||
+ (atomic_read(&(dev->power.usage_count)) > 1))
+ return 0;
+
+ return sprd_dma_runtime_suspend(dev);
+}
+
+static int sprd_dma_resume_early(struct device *dev)
+{
+ if ((pm_runtime_status_suspended(dev)) ||
+ (atomic_read(&(dev->power.usage_count)) > 1))
+ return 0;
+
+ return sprd_dma_runtime_resume(dev);
+}
+
static const struct dev_pm_ops sprd_dma_pm_ops = {
SET_RUNTIME_PM_OPS(sprd_dma_runtime_suspend,
sprd_dma_runtime_resume,
NULL)
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sprd_dma_suspend_noirq,
+ sprd_dma_resume_early)
};
static struct platform_driver sprd_dma_driver = {
--
2.17.1
