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Message-ID: <fd95a14221c25ae57278ef037a94266c7da12d3b.camel@intel.com>
Date: Fri, 23 Sep 2022 22:25:36 +0800
From: Zhang Rui <rui.zhang@...el.com>
To: Daniel Lezcano <daniel.lezcano@...aro.org>, rafael@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
Amit Kucheria <amitk@...nel.org>,
Lukasz Luba <lukasz.luba@....com>
Subject: Re: [PATCH v4 05/30] thermal/core/governors: Use
thermal_zone_get_trip() instead of ops functions
On Wed, 2022-09-21 at 11:42 +0200, Daniel Lezcano wrote:
> The governors are using the ops->get_trip_* functions, Replace these
> calls with thermal_zone_get_trip().
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
> drivers/thermal/gov_bang_bang.c | 23 +++++-------
> drivers/thermal/gov_fair_share.c | 18 ++++------
> drivers/thermal/gov_power_allocator.c | 51 ++++++++++++-------------
> --
> drivers/thermal/gov_step_wise.c | 22 ++++++------
> 4 files changed, 47 insertions(+), 67 deletions(-)
>
> diff --git a/drivers/thermal/gov_bang_bang.c
> b/drivers/thermal/gov_bang_bang.c
> index a08bbe33be96..09234f3d2fb9 100644
> --- a/drivers/thermal/gov_bang_bang.c
> +++ b/drivers/thermal/gov_bang_bang.c
> @@ -13,26 +13,19 @@
>
> #include "thermal_core.h"
>
> -static void thermal_zone_trip_update(struct thermal_zone_device *tz,
> int trip)
> +static void thermal_zone_trip_update(struct thermal_zone_device *tz,
> int trip_id)
> {
> - int trip_temp, trip_hyst;
> + struct thermal_trip trip;
> struct thermal_instance *instance;
>
> - tz->ops->get_trip_temp(tz, trip, &trip_temp);
> -
> - if (!tz->ops->get_trip_hyst) {
> - pr_warn_once("Undefined get_trip_hyst for thermal zone
> %s - "
> - "running with default hysteresis
> zero\n", tz->type);
> - trip_hyst = 0;
> - } else
> - tz->ops->get_trip_hyst(tz, trip, &trip_hyst);
> + thermal_zone_get_trip(tz, trip_id, &trip);
>
We lose the warning messages, but I don't know how important this
warning message is.
Other than that,
Reviewed-by: Zhang Rui <rui.zhang@...el.com>
thanks,
rui
>
> dev_dbg(&tz->device, "Trip%d[temp=%d]:temp=%d:hyst=%d\n",
> - trip, trip_temp, tz->temperature,
> - trip_hyst);
> + trip_id, trip.temperature, tz-
> >temperature,
> + trip.hysteresis);
>
> list_for_each_entry(instance, &tz->thermal_instances, tz_node)
> {
> - if (instance->trip != trip)
> + if (instance->trip != trip_id)
> continue;
>
> /* in case fan is in initial state, switch the fan off
> */
> @@ -50,10 +43,10 @@ static void thermal_zone_trip_update(struct
> thermal_zone_device *tz, int trip)
> * enable fan when temperature exceeds trip_temp and
> disable
> * the fan in case it falls below trip_temp minus
> hysteresis
> */
> - if (instance->target == 0 && tz->temperature >=
> trip_temp)
> + if (instance->target == 0 && tz->temperature >=
> trip.temperature)
> instance->target = 1;
> else if (instance->target == 1 &&
> - tz->temperature <= trip_temp -
> trip_hyst)
> + tz->temperature <= trip.temperature -
> trip.hysteresis)
> instance->target = 0;
>
> dev_dbg(&instance->cdev->device, "target=%d\n",
> diff --git a/drivers/thermal/gov_fair_share.c
> b/drivers/thermal/gov_fair_share.c
> index a4ee4661e9cc..c515e7a52294 100644
> --- a/drivers/thermal/gov_fair_share.c
> +++ b/drivers/thermal/gov_fair_share.c
> @@ -21,16 +21,12 @@
> */
> static int get_trip_level(struct thermal_zone_device *tz)
> {
> - int count = 0;
> - int trip_temp;
> - enum thermal_trip_type trip_type;
> -
> - if (tz->num_trips == 0 || !tz->ops->get_trip_temp)
> - return 0;
> + struct thermal_trip trip;
> + int count;
>
> for (count = 0; count < tz->num_trips; count++) {
> - tz->ops->get_trip_temp(tz, count, &trip_temp);
> - if (tz->temperature < trip_temp)
> + thermal_zone_get_trip(tz, count, &trip);
> + if (tz->temperature < trip.temperature)
> break;
> }
>
> @@ -38,10 +34,8 @@ static int get_trip_level(struct
> thermal_zone_device *tz)
> * count > 0 only if temperature is greater than first trip
> * point, in which case, trip_point = count - 1
> */
> - if (count > 0) {
> - tz->ops->get_trip_type(tz, count - 1, &trip_type);
> - trace_thermal_zone_trip(tz, count - 1, trip_type);
> - }
> + if (count > 0)
> + trace_thermal_zone_trip(tz, count - 1, trip.type);
>
> return count;
> }
> diff --git a/drivers/thermal/gov_power_allocator.c
> b/drivers/thermal/gov_power_allocator.c
> index 2d1aeaba38a8..2ef86ced4c7c 100644
> --- a/drivers/thermal/gov_power_allocator.c
> +++ b/drivers/thermal/gov_power_allocator.c
> @@ -125,16 +125,15 @@ static void estimate_pid_constants(struct
> thermal_zone_device *tz,
> u32 sustainable_power, int
> trip_switch_on,
> int control_temp)
> {
> + struct thermal_trip trip;
> + u32 temperature_threshold = control_temp;
> int ret;
> - int switch_on_temp;
> - u32 temperature_threshold;
> s32 k_i;
>
> - ret = tz->ops->get_trip_temp(tz, trip_switch_on,
> &switch_on_temp);
> - if (ret)
> - switch_on_temp = 0;
> + ret = thermal_zone_get_trip(tz, trip_switch_on, &trip);
> + if (!ret)
> + temperature_threshold -= trip.temperature;
>
> - temperature_threshold = control_temp - switch_on_temp;
> /*
> * estimate_pid_constants() tries to find appropriate default
> * values for thermal zones that don't provide them. If a
> @@ -520,10 +519,10 @@ static void get_governor_trips(struct
> thermal_zone_device *tz,
> last_passive = INVALID_TRIP;
>
> for (i = 0; i < tz->num_trips; i++) {
> - enum thermal_trip_type type;
> + struct thermal_trip trip;
> int ret;
>
> - ret = tz->ops->get_trip_type(tz, i, &type);
> + ret = thermal_zone_get_trip(tz, i, &trip);
> if (ret) {
> dev_warn(&tz->device,
> "Failed to get trip point %d type:
> %d\n", i,
> @@ -531,14 +530,14 @@ static void get_governor_trips(struct
> thermal_zone_device *tz,
> continue;
> }
>
> - if (type == THERMAL_TRIP_PASSIVE) {
> + if (trip.type == THERMAL_TRIP_PASSIVE) {
> if (!found_first_passive) {
> params->trip_switch_on = i;
> found_first_passive = true;
> } else {
> last_passive = i;
> }
> - } else if (type == THERMAL_TRIP_ACTIVE) {
> + } else if (trip.type == THERMAL_TRIP_ACTIVE) {
> last_active = i;
> } else {
> break;
> @@ -633,7 +632,7 @@ static int power_allocator_bind(struct
> thermal_zone_device *tz)
> {
> int ret;
> struct power_allocator_params *params;
> - int control_temp;
> + struct thermal_trip trip;
>
> ret = check_power_actors(tz);
> if (ret)
> @@ -659,13 +658,12 @@ static int power_allocator_bind(struct
> thermal_zone_device *tz)
> get_governor_trips(tz, params);
>
> if (tz->num_trips > 0) {
> - ret = tz->ops->get_trip_temp(tz,
> - params-
> >trip_max_desired_temperature,
> - &control_temp);
> + ret = thermal_zone_get_trip(tz, params-
> >trip_max_desired_temperature,
> + &trip);
> if (!ret)
> estimate_pid_constants(tz, tz->tzp-
> >sustainable_power,
> params->trip_switch_on,
> - control_temp);
> + trip.temperature);
> }
>
> reset_pid_controller(params);
> @@ -695,11 +693,11 @@ static void power_allocator_unbind(struct
> thermal_zone_device *tz)
> tz->governor_data = NULL;
> }
>
> -static int power_allocator_throttle(struct thermal_zone_device *tz,
> int trip)
> +static int power_allocator_throttle(struct thermal_zone_device *tz,
> int trip_id)
> {
> - int ret;
> - int switch_on_temp, control_temp;
> struct power_allocator_params *params = tz->governor_data;
> + struct thermal_trip trip;
> + int ret;
> bool update;
>
> lockdep_assert_held(&tz->lock);
> @@ -708,13 +706,12 @@ static int power_allocator_throttle(struct
> thermal_zone_device *tz, int trip)
> * We get called for every trip point but we only need to do
> * our calculations once
> */
> - if (trip != params->trip_max_desired_temperature)
> + if (trip_id != params->trip_max_desired_temperature)
> return 0;
>
> - ret = tz->ops->get_trip_temp(tz, params->trip_switch_on,
> - &switch_on_temp);
> - if (!ret && (tz->temperature < switch_on_temp)) {
> - update = (tz->last_temperature >= switch_on_temp);
> + ret = thermal_zone_get_trip(tz, params->trip_switch_on, &trip);
> + if (!ret && (tz->temperature < trip.temperature)) {
> + update = (tz->last_temperature >= trip.temperature);
> tz->passive = 0;
> reset_pid_controller(params);
> allow_maximum_power(tz, update);
> @@ -723,16 +720,14 @@ static int power_allocator_throttle(struct
> thermal_zone_device *tz, int trip)
>
> tz->passive = 1;
>
> - ret = tz->ops->get_trip_temp(tz, params-
> >trip_max_desired_temperature,
> - &control_temp);
> + ret = thermal_zone_get_trip(tz, params-
> >trip_max_desired_temperature, &trip);
> if (ret) {
> - dev_warn(&tz->device,
> - "Failed to get the maximum desired
> temperature: %d\n",
> + dev_warn(&tz->device, "Failed to get the maximum
> desired temperature: %d\n",
> ret);
> return ret;
> }
>
> - return allocate_power(tz, control_temp);
> + return allocate_power(tz, trip.temperature);
> }
>
> static struct thermal_governor thermal_gov_power_allocator = {
> diff --git a/drivers/thermal/gov_step_wise.c
> b/drivers/thermal/gov_step_wise.c
> index cdd3354bc27f..3cb16d7e65d1 100644
> --- a/drivers/thermal/gov_step_wise.c
> +++ b/drivers/thermal/gov_step_wise.c
> @@ -95,30 +95,28 @@ static void update_passive_instance(struct
> thermal_zone_device *tz,
> tz->passive += value;
> }
>
> -static void thermal_zone_trip_update(struct thermal_zone_device *tz,
> int trip)
> +static void thermal_zone_trip_update(struct thermal_zone_device *tz,
> int trip_id)
> {
> - int trip_temp;
> - enum thermal_trip_type trip_type;
> enum thermal_trend trend;
> struct thermal_instance *instance;
> + struct thermal_trip trip;
> bool throttle = false;
> int old_target;
>
> - tz->ops->get_trip_temp(tz, trip, &trip_temp);
> - tz->ops->get_trip_type(tz, trip, &trip_type);
> + thermal_zone_get_trip(tz, trip_id, &trip);
>
> - trend = get_tz_trend(tz, trip);
> + trend = get_tz_trend(tz, trip_id);
>
> - if (tz->temperature >= trip_temp) {
> + if (tz->temperature >= trip.temperature) {
> throttle = true;
> - trace_thermal_zone_trip(tz, trip, trip_type);
> + trace_thermal_zone_trip(tz, trip_id, trip.type);
> }
>
> dev_dbg(&tz->device,
> "Trip%d[type=%d,temp=%d]:trend=%d,throttle=%d\n",
> - trip, trip_type, trip_temp, trend,
> throttle);
> + trip_id, trip.type, trip.temperature,
> trend, throttle);
>
> list_for_each_entry(instance, &tz->thermal_instances, tz_node)
> {
> - if (instance->trip != trip)
> + if (instance->trip != trip_id)
> continue;
>
> old_target = instance->target;
> @@ -132,11 +130,11 @@ static void thermal_zone_trip_update(struct
> thermal_zone_device *tz, int trip)
> /* Activate a passive thermal instance */
> if (old_target == THERMAL_NO_TARGET &&
> instance->target != THERMAL_NO_TARGET)
> - update_passive_instance(tz, trip_type, 1);
> + update_passive_instance(tz, trip.type, 1);
> /* Deactivate a passive thermal instance */
> else if (old_target != THERMAL_NO_TARGET &&
> instance->target == THERMAL_NO_TARGET)
> - update_passive_instance(tz, trip_type, -1);
> + update_passive_instance(tz, trip.type, -1);
>
> instance->initialized = true;
> mutex_lock(&instance->cdev->lock);
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