diff options
Diffstat (limited to 'drivers/thermal/gov_step_wise.c')
| -rw-r--r-- | drivers/thermal/gov_step_wise.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/thermal/gov_step_wise.c b/drivers/thermal/gov_step_wise.c index e6cd4a255346..ce0c7e0408e8 100644 --- a/drivers/thermal/gov_step_wise.c +++ b/drivers/thermal/gov_step_wise.c @@ -20,8 +20,10 @@ * If the temperature is higher than a hysteresis temperature, * a. if the trend is THERMAL_TREND_RAISING, use higher cooling * state for this trip point - * b. if the trend is THERMAL_TREND_DROPPING, do nothing - * If the temperature is lower than a hysteresis temperature, + * b. if the trend is THERMAL_TREND_DROPPING, use a lower cooling state + * for this trip point, but keep the cooling state above the applicable + * minimum + * 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 @@ -51,6 +53,17 @@ static unsigned long get_target_state(struct thermal_instance *instance, if (throttle) { if (trend == THERMAL_TREND_RAISING) return clamp(cur_state + 1, instance->lower, instance->upper); + + /* + * If the zone temperature is falling, the cooling level can + * be reduced, but it should still be above the lower state of + * the given thermal instance to pull the temperature further + * down. + */ + if (trend == THERMAL_TREND_DROPPING) + return clamp(cur_state - 1, + min(instance->lower + 1, instance->upper), + instance->upper); } else if (trend == THERMAL_TREND_DROPPING) { if (cur_state <= instance->lower) return THERMAL_NO_TARGET; |