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[71.255.246.27]) by smtp.googlemail.com with ESMTPSA id o52sm5261275qtf.56.2019.09.18.19.18.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 18 Sep 2019 19:18:29 -0700 (PDT) From: Thara Gopinath To: rui.zhang@intel.com, edubezval@gmail.com, daniel.lezcano@linaro.org, vincent.guittot@linaro.org, bjorn.andersson@linaro.org, robh+dt@kernel.org Cc: amit.kucheria@verdurent.com, mark.rutland@arm.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] thermal: step_wise: Extend thermal step-wise governor to monitor falling temperature. Date: Wed, 18 Sep 2019 22:18:23 -0400 Message-Id: <1568859503-19725-5-git-send-email-thara.gopinath@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1568859503-19725-1-git-send-email-thara.gopinath@linaro.org> References: <1568859503-19725-1-git-send-email-thara.gopinath@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org >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 temprature 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 --- drivers/thermal/step_wise.c | 59 +++++++++++++++++++++++++++++++++------------ 1 file changed, 44 insertions(+), 15 deletions(-) -- 2.1.4 diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c index 6e051cb..aa8e0a0 100644 --- a/drivers/thermal/step_wise.c +++ b/drivers/thermal/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 +66,21 @@ 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; + } + } 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 +88,23 @@ 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 +137,8 @@ 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 +152,15 @@ 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_monitor_type) + tz->ops->get_trip_monitor_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 +175,8 @@ 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);