X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0172-drivers-thermal-step_wise-add-support-for-hysteresis.patch;fp=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0172-drivers-thermal-step_wise-add-support-for-hysteresis.patch;h=0000000000000000000000000000000000000000;hb=67dcc43f3a22dc3a7ac07a7065971b426feeb043;hp=3043559c0feb35901499fe70f7de721afba76ebb;hpb=47a93a810f78adce5a130d287f82b28e9b54313c;p=openwrt%2Fstaging%2Fchunkeey.git

diff --git a/target/linux/brcm2708/patches-4.19/950-0172-drivers-thermal-step_wise-add-support-for-hysteresis.patch b/target/linux/brcm2708/patches-4.19/950-0172-drivers-thermal-step_wise-add-support-for-hysteresis.patch
deleted file mode 100644
index 3043559c0f..0000000000
--- a/target/linux/brcm2708/patches-4.19/950-0172-drivers-thermal-step_wise-add-support-for-hysteresis.patch
+++ /dev/null
@@ -1,96 +0,0 @@
-From 05a13bbd7fbb76b4f690042173749a55d85de831 Mon Sep 17 00:00:00 2001
-From: Ram Chandrasekar <rkumbako@codeaurora.org>
-Date: Mon, 7 May 2018 11:54:08 -0600
-Subject: [PATCH 172/806] drivers: thermal: step_wise: add support for
- hysteresis
-
-From: Ram Chandrasekar <rkumbako@codeaurora.org>
-
-Step wise governor increases the mitigation level when the temperature
-goes above a threshold and will decrease the mitigation when the
-temperature falls below the threshold. If it were a case, where the
-temperature hovers around a threshold, the mitigation will be applied
-and removed at every iteration. This reaction to the temperature is
-inefficient for performance.
-
-The use of hysteresis temperature could avoid this ping-pong of
-mitigation by relaxing the mitigation to happen only when the
-temperature goes below this lower hysteresis value.
-
-Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
-Signed-off-by: Lina Iyer <ilina@codeaurora.org>
----
- drivers/thermal/step_wise.c | 33 +++++++++++++++++++++++----------
- 1 file changed, 23 insertions(+), 10 deletions(-)
-
---- a/drivers/thermal/step_wise.c
-+++ b/drivers/thermal/step_wise.c
-@@ -36,7 +36,7 @@
-  *       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,
-+ * If the temperature is lower than a hysteresis temperature,
-  *    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
-@@ -127,7 +127,7 @@ static void update_passive_instance(stru
- 
- static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
- {
--	int trip_temp;
-+	int trip_temp, hyst_temp;
- 	enum thermal_trip_type trip_type;
- 	enum thermal_trend trend;
- 	struct thermal_instance *instance;
-@@ -135,22 +135,23 @@ static void thermal_zone_trip_update(str
- 	int old_target;
- 
- 	if (trip == THERMAL_TRIPS_NONE) {
--		trip_temp = tz->forced_passive;
-+		hyst_temp = trip_temp = tz->forced_passive;
- 		trip_type = THERMAL_TRIPS_NONE;
- 	} else {
- 		tz->ops->get_trip_temp(tz, trip, &trip_temp);
-+		hyst_temp = trip_temp;
-+		if (tz->ops->get_trip_hyst) {
-+			tz->ops->get_trip_hyst(tz, trip, &hyst_temp);
-+			hyst_temp = trip_temp - hyst_temp;
-+		}
- 		tz->ops->get_trip_type(tz, trip, &trip_type);
- 	}
- 
- 	trend = get_tz_trend(tz, trip);
- 
--	if (tz->temperature >= trip_temp) {
--		throttle = true;
--		trace_thermal_zone_trip(tz, trip, trip_type);
--	}
--
--	dev_dbg(&tz->device, "Trip%d[type=%d,temp=%d]:trend=%d,throttle=%d\n",
--				trip, trip_type, trip_temp, trend, throttle);
-+	dev_dbg(&tz->device,
-+		"Trip%d[type=%d,temp=%d,hyst=%d]:trend=%d,throttle=%d\n",
-+		trip, trip_type, trip_temp, hyst_temp, trend, throttle);
- 
- 	mutex_lock(&tz->lock);
- 
-@@ -159,6 +160,18 @@ static void thermal_zone_trip_update(str
- 			continue;
- 
- 		old_target = instance->target;
-+		throttle = false;
-+		/*
-+		 * Lower the mitigation only if the temperature
-+		 * goes below the hysteresis temperature.
-+		 */
-+		if (tz->temperature >= trip_temp ||
-+		   (tz->temperature >= hyst_temp &&
-+		   old_target != THERMAL_NO_TARGET)) {
-+			throttle = true;
-+			trace_thermal_zone_trip(tz, trip, trip_type);
-+		}
-+
- 		instance->target = get_target_state(instance, trend, throttle);
- 		dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n",
- 					old_target, (int)instance->target);