Some drivers (like i915/drm) need to get the accounted suspended time.
pm_runtime_accounted_time_get() will return the suspended or active
accounted time until now.
Signed-off-by: Vincent Guittot <vincent.guit...@linaro.org>
---
drivers/base/power/runtime.c | 26 ++++++++++++++++++++++++++
include/linux/pm_runtime.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 7062469..6461469 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -88,6 +88,32 @@ static void __update_runtime_status(struct device *dev, enum
rpm_status status)
dev->power.runtime_status = status;
}
+u64 pm_runtime_accounted_time_get(struct device *dev, enum rpm_status status,
bool update)
+{
+ u64 now = ktime_to_ns(ktime_get());
+ u64 delta = 0, time = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->power.lock, flags);
+
+ if (dev->power.disable_depth > 0)
+ goto unlock;
+
+ /* Add ongoing state if requested */
+ if (update && dev->power.runtime_status == status)
+ delta = now - dev->power.accounting_timestamp;
+
+ if (status == RPM_SUSPENDED)
+ time = dev->power.suspended_time + delta;
+ else
+ time = dev->power.active_time + delta;
+
+unlock:
+ spin_unlock_irqrestore(&dev->power.lock, flags);
+
+ return time;
+}
+
/**
* pm_runtime_deactivate_timer - Deactivate given device's suspend timer.
* @dev: Device to handle.
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 54af4ee..86f21f9 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -113,6 +113,8 @@ static inline bool pm_runtime_is_irq_safe(struct device
*dev)
return dev->power.irq_safe;
}
+extern u64 pm_runtime_accounted_time_get(struct device *dev, enum rpm_status
status, bool update);
+
#else /* !CONFIG_PM */
static inline bool queue_pm_work(struct work_struct *work) { return false; }
--
2.7.4
