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Commit 3dbfff3d authored by Zhang Rui's avatar Zhang Rui
Browse files

Introduce THERMAL_TREND_RAISE/DROP_FULL support for step_wise governor 



step_wise governor should set the device cooling state to
upper/lower limit directly when THERMAL_TREND_RAISE/DROP_FULL.

Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent d069015e

drivers/thermal/step_wise.c

+46 −18
Original line number Diff line number Diff line
@@ -35,21 +35,54 @@ 
 *       state for this trip point

 *    b. if the trend is THERMAL_TREND_DROPPING, use lower cooling

 *       state for this trip point

 *    c. if the trend is THERMAL_TREND_RAISE_FULL, use upper limit

 *       for this trip point

 *    d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit

 *       for this trip point

 * If the temperature is lower than a trip point,

 *    a. if the trend is THERMAL_TREND_RAISING, do nothing

 *    b. if the trend is THERMAL_TREND_DROPPING, use lower cooling

 *       state for this trip point, if the cooling state already

 *       equals lower limit, deactivate the thermal instance

 *    c. if the trend is THERMAL_TREND_RAISE_FULL, do nothing

 *    d. if the trend is THERMAL_TREND_DROP_FULL, use lower limit,

 *       if the cooling state already equals lower limit,

 *       deactive the thermal instance

 */

static unsigned long get_target_state(struct thermal_instance *instance,

					enum thermal_trend trend)

				enum thermal_trend trend, bool throttle)

{

	struct thermal_cooling_device *cdev = instance->cdev;

	unsigned long cur_state;



	cdev->ops->get_cur_state(cdev, &cur_state);



	if (trend == THERMAL_TREND_RAISING) {

	switch (trend) {

	case THERMAL_TREND_RAISING:

		if (throttle)

			cur_state = cur_state < instance->upper ?

				    (cur_state + 1) : instance->upper;

	} else if (trend == THERMAL_TREND_DROPPING) {

		cur_state = cur_state > instance->lower ?

			    (cur_state - 1) : instance->lower;

		break;

	case THERMAL_TREND_RAISE_FULL:

		if (throttle)

			cur_state = instance->upper;

		break;

	case THERMAL_TREND_DROPPING:

		if (cur_state == instance->lower) {

			if (!throttle)

				cur_state = -1;

		} else

			cur_state -= 1;

		break;

	case THERMAL_TREND_DROP_FULL:

		if (cur_state == instance->lower) {

			if (!throttle)

				cur_state = -1;

		} else

			cur_state = instance->lower;

		break;

	default:

		break;

	}



	return cur_state;
@@ -76,7 +109,7 @@ static void update_instance_for_throttle(struct thermal_zone_device *tz, 
		if (instance->trip != trip)

			continue;



		instance->target = get_target_state(instance, trend);

		instance->target = get_target_state(instance, trend, true);



		/* Activate a passive thermal instance */

		if (instance->target == THERMAL_NO_TARGET)
@@ -87,28 +120,23 @@ static void update_instance_for_throttle(struct thermal_zone_device *tz, 
}



static void update_instance_for_dethrottle(struct thermal_zone_device *tz,

				int trip, enum thermal_trip_type trip_type)

				int trip, enum thermal_trip_type trip_type,

				enum thermal_trend trend)

{

	struct thermal_instance *instance;

	struct thermal_cooling_device *cdev;

	unsigned long cur_state;



	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {

		if (instance->trip != trip ||

			instance->target == THERMAL_NO_TARGET)

			continue;



		cdev = instance->cdev;

		cdev->ops->get_cur_state(cdev, &cur_state);



		instance->target = cur_state > instance->lower ?

			    (cur_state - 1) : THERMAL_NO_TARGET;

		instance->target = get_target_state(instance, trend, false);



		/* Deactivate a passive thermal instance */

		if (instance->target == THERMAL_NO_TARGET)

			update_passive_instance(tz, trip_type, -1);



		cdev->updated = false; /* cdev needs update */

		instance->cdev->updated = false; /* cdev needs update */

	}

}
@@ -133,7 +161,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) 
	if (tz->temperature >= trip_temp)

		update_instance_for_throttle(tz, trip, trip_type, trend);

	else

		update_instance_for_dethrottle(tz, trip, trip_type);

		update_instance_for_dethrottle(tz, trip, trip_type, trend);



	mutex_unlock(&tz->lock);

}