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