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Date: Wed, 16 Sep 2020 23:22:23 -0400
From: Thara Gopinath <thara.gopinath@...aro.org>
To: rui.zhang@...el.com, daniel.lezcano@...aro.org, robh+dt@...nel.org,
agross@...nel.org, bjorn.andersson@...aro.org
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
lukasz.luba@....com, amitk@...nel.org
Subject: [PATCH RFC 5/8] thermal: gov_step_wise: Extend thermal step-wise governor to monitor falling temperature.
>From the step wise governor point of view, the policy decisions
that has to taken on a thermal trip point that is defined to be monitored
for falling temperature is the mirror opposite of the decisions it has
to take on a trip point that is monitored for rising temperature.
Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
---
drivers/thermal/gov_step_wise.c | 62 +++++++++++++++++++++++++--------
1 file changed, 47 insertions(+), 15 deletions(-)
diff --git a/drivers/thermal/gov_step_wise.c b/drivers/thermal/gov_step_wise.c
index 2ae7198d3067..c036ff7b4fb2 100644
--- a/drivers/thermal/gov_step_wise.c
+++ b/drivers/thermal/gov_step_wise.c
@@ -35,7 +35,8 @@
* deactivate the thermal instance
*/
static unsigned long get_target_state(struct thermal_instance *instance,
- enum thermal_trend trend, bool throttle)
+ enum thermal_trend trend, bool throttle,
+ enum thermal_trip_monitor_type type)
{
struct thermal_cooling_device *cdev = instance->cdev;
unsigned long cur_state;
@@ -65,11 +66,24 @@ static unsigned long get_target_state(struct thermal_instance *instance,
switch (trend) {
case THERMAL_TREND_RAISING:
- if (throttle) {
- next_target = cur_state < instance->upper ?
- (cur_state + 1) : instance->upper;
- if (next_target < instance->lower)
- next_target = instance->lower;
+ if (type == THERMAL_TRIP_MONITOR_FALLING) {
+ if (cur_state <= instance->lower) {
+ if (!throttle)
+ next_target = THERMAL_NO_TARGET;
+ } else {
+ if (!throttle) {
+ next_target = cur_state - 1;
+ if (next_target > instance->upper)
+ next_target = instance->upper;
+ }
+ }
+ } else {
+ if (throttle) {
+ next_target = cur_state < instance->upper ?
+ (cur_state + 1) : instance->upper;
+ if (next_target < instance->lower)
+ next_target = instance->lower;
+ }
}
break;
case THERMAL_TREND_RAISE_FULL:
@@ -77,14 +91,23 @@ static unsigned long get_target_state(struct thermal_instance *instance,
next_target = instance->upper;
break;
case THERMAL_TREND_DROPPING:
- if (cur_state <= instance->lower) {
- if (!throttle)
- next_target = THERMAL_NO_TARGET;
+ if (type == THERMAL_TRIP_MONITOR_FALLING) {
+ if (throttle) {
+ next_target = cur_state < instance->upper ?
+ (cur_state + 1) : instance->upper;
+ if (next_target < instance->lower)
+ next_target = instance->lower;
+ }
} else {
- if (!throttle) {
- next_target = cur_state - 1;
- if (next_target > instance->upper)
- next_target = instance->upper;
+ if (cur_state <= instance->lower) {
+ if (!throttle)
+ next_target = THERMAL_NO_TARGET;
+ } else {
+ if (!throttle) {
+ next_target = cur_state - 1;
+ if (next_target > instance->upper)
+ next_target = instance->upper;
+ }
}
}
break;
@@ -117,6 +140,8 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
{
int trip_temp;
enum thermal_trip_type trip_type;
+ enum thermal_trip_monitor_type monitor_type =
+ THERMAL_TRIP_MONITOR_RISING;
enum thermal_trend trend;
struct thermal_instance *instance;
bool throttle = false;
@@ -130,9 +155,15 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
tz->ops->get_trip_type(tz, trip, &trip_type);
}
+ if (tz->ops->get_trip_mon_type)
+ tz->ops->get_trip_mon_type(tz, trip, &monitor_type);
+
trend = get_tz_trend(tz, trip);
- if (tz->temperature >= trip_temp) {
+ if (((monitor_type == THERMAL_TRIP_MONITOR_RISING) &&
+ (tz->temperature >= trip_temp)) ||
+ ((monitor_type == THERMAL_TRIP_MONITOR_FALLING) &&
+ (tz->temperature <= trip_temp))) {
throttle = true;
trace_thermal_zone_trip(tz, trip, trip_type);
}
@@ -147,7 +178,8 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
continue;
old_target = instance->target;
- instance->target = get_target_state(instance, trend, throttle);
+ instance->target = get_target_state(instance, trend,
+ throttle, monitor_type);
dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n",
old_target, (int)instance->target);
--
2.25.1
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