From: Aaron Lu aaron.lu@intel.com
To ease debugging thermal problem, add these dynamic debug statements so that user do not need rebuild kernel to see these info.
Based on a patch from Zhang Rui for debugging on bugzilla: https://bugzilla.kernel.org/attachment.cgi?id=98671
A sample output after we turn on dynamic debug with the following cmd: is like:
[ 355.147627] update_temperature: thermal thermal_zone0: last_temperature=52000, current_temperature=55000 [ 355.147636] thermal_zone_trip_update: thermal thermal_zone0: Trip1[type=1,temp=79000]:trend=2,throttle=0 [ 355.147644] get_target_state: thermal cooling_device8: cur_state=0 [ 355.147647] thermal_zone_trip_update: thermal cooling_device8: old_target=-1, target=-1 [ 355.147652] get_target_state: thermal cooling_device7: cur_state=0 [ 355.147655] thermal_zone_trip_update: thermal cooling_device7: old_target=-1, target=-1 [ 355.147660] get_target_state: thermal cooling_device6: cur_state=0 [ 355.147663] thermal_zone_trip_update: thermal cooling_device6: old_target=-1, target=-1 [ 355.147668] get_target_state: thermal cooling_device5: cur_state=0 [ 355.147671] thermal_zone_trip_update: thermal cooling_device5: old_target=-1, target=-1 [ 355.147678] thermal_zone_trip_update: thermal thermal_zone0: Trip2[type=0,temp=90000]:trend=1,throttle=0 [ 355.147776] get_target_state: thermal cooling_device0: cur_state=0 [ 355.147783] thermal_zone_trip_update: thermal cooling_device0: old_target=-1, target=-1 [ 355.147792] thermal_zone_trip_update: thermal thermal_zone0: Trip3[type=0,temp=80000]:trend=1,throttle=0 [ 355.147845] get_target_state: thermal cooling_device1: cur_state=0 [ 355.147849] thermal_zone_trip_update: thermal cooling_device1: old_target=-1, target=-1 [ 355.147856] thermal_zone_trip_update: thermal thermal_zone0: Trip4[type=0,temp=70000]:trend=1,throttle=0 [ 355.147904] get_target_state: thermal cooling_device2: cur_state=0 [ 355.147908] thermal_zone_trip_update: thermal cooling_device2: old_target=-1, target=-1 [ 355.147915] thermal_zone_trip_update: thermal thermal_zone0: Trip5[type=0,temp=60000]:trend=1,throttle=0 [ 355.147963] get_target_state: thermal cooling_device3: cur_state=0 [ 355.147967] thermal_zone_trip_update: thermal cooling_device3: old_target=-1, target=-1 [ 355.147973] thermal_zone_trip_update: thermal thermal_zone0: Trip6[type=0,temp=55000]:trend=1,throttle=1 [ 355.148022] get_target_state: thermal cooling_device4: cur_state=0 [ 355.148025] thermal_zone_trip_update: thermal cooling_device4: old_target=-1, target=1 [ 355.148036] thermal_cdev_update: thermal cooling_device4: zone0->target=1 [ 355.169279] thermal_cdev_update: thermal cooling_device4: set to state 1
Signed-off-by: Aaron Lu aaron.lu@intel.com Acked-by: Eduardo Valentin eduardo.valentin@ti.com Signed-off-by: Zhang Rui rui.zhang@intel.com (cherry picked from commit 06475b556cb4863cf1dcace9b2d21dac1fc74daf)
Signed-off-by: Alex Shi alex.shi@linaro.org
Conflicts: drivers/thermal/step_wise.c --- drivers/thermal/step_wise.c | 6 ++++++ drivers/thermal/thermal_core.c | 6 ++++++ 2 files changed, 12 insertions(+)
diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c index 4d4ddae..c83a309 100644 --- a/drivers/thermal/step_wise.c +++ b/drivers/thermal/step_wise.c @@ -53,6 +53,7 @@ static unsigned long get_target_state(struct thermal_instance *instance, unsigned long cur_state;
cdev->ops->get_cur_state(cdev, &cur_state); + dev_dbg(&cdev->device, "cur_state=%ld\n", cur_state);
switch (trend) { case THERMAL_TREND_RAISING: @@ -124,6 +125,9 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) if (tz->temperature >= trip_temp) throttle = true;
+ dev_dbg(&tz->device, "Trip%d[type=%d,temp=%ld]:trend=%d,throttle=%d\n", + trip, trip_type, trip_temp, trend, throttle); + mutex_lock(&tz->lock);
list_for_each_entry(instance, &tz->thermal_instances, tz_node) { @@ -132,6 +136,8 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
old_target = instance->target; instance->target = get_target_state(instance, trend, throttle); + dev_dbg(&instance->cdev->device, "old_target=%d, target=%d\n", + old_target, (int)instance->target);
/* Activate a passive thermal instance */ if (old_target == THERMAL_NO_TARGET && diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 916bde1..83cc99b 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -438,6 +438,9 @@ static void update_temperature(struct thermal_zone_device *tz) tz->last_temperature = tz->temperature; tz->temperature = temp; mutex_unlock(&tz->lock); + + dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", + tz->last_temperature, tz->temperature); }
void thermal_zone_device_update(struct thermal_zone_device *tz) @@ -1243,6 +1246,8 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev) mutex_lock(&cdev->lock); /* Make sure cdev enters the deepest cooling state */ list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { + dev_dbg(&cdev->device, "zone%d->target=%lu\n", + instance->tz->id, instance->target); if (instance->target == THERMAL_NO_TARGET) continue; if (instance->target > target) @@ -1251,6 +1256,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev) mutex_unlock(&cdev->lock); cdev->ops->set_cur_state(cdev, target); cdev->updated = true; + dev_dbg(&cdev->device, "set to state %lu\n", target); } EXPORT_SYMBOL(thermal_cdev_update);