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thermal: power allocator: change the 'k_*' always in estimate_pid_constants()

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The PID coefficients should be estimated again when there was a change to
sustainable power value made by user. This change removes unused argument
'force' and makes the function ready for such updates.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20201124161025.27694-4-lukasz.luba@arm.com
This commit is contained in:
Lukasz Luba 2020-11-24 16:10:25 +00:00 committed by Daniel Lezcano
parent eda1ecfa77
commit 90a9965449
1 changed files with 9 additions and 19 deletions
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28
drivers/thermal/gov_power_allocator.c
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@ -117,18 +117,13 @@ static u32 estimate_sustainable_power(struct thermal_zone_device *tz)
* @sustainable_power: sustainable power for the thermal zone
* @trip_switch_on: trip point number for the switch on temperature
* @control_temp: target temperature for the power allocator governor
* @force: whether to force the update of the constants
*
* This function is used to update the estimation of the PID
* controller constants in struct thermal_zone_parameters.
*
* If @force is not set, the values in the thermal zone's parameters
* are preserved if they are not zero. If @force is set, the values
* in thermal zone's parameters are overwritten.
*/
static void estimate_pid_constants(struct thermal_zone_device *tz,
u32 sustainable_power, int trip_switch_on,
int control_temp, bool force)
int control_temp)
{
int ret;
int switch_on_temp;
@ -151,18 +146,14 @@ static void estimate_pid_constants(struct thermal_zone_device *tz,
if (!temperature_threshold)
return;
if (!tz->tzp->k_po || force)
tz->tzp->k_po = int_to_frac(sustainable_power) /
temperature_threshold;
tz->tzp->k_po = int_to_frac(sustainable_power) /
temperature_threshold;
if (!tz->tzp->k_pu || force)
tz->tzp->k_pu = int_to_frac(2 * sustainable_power) /
temperature_threshold;
tz->tzp->k_pu = int_to_frac(2 * sustainable_power) /
temperature_threshold;
if (!tz->tzp->k_i || force) {
k_i = tz->tzp->k_pu / 10;
tz->tzp->k_i = k_i > 0 ? k_i : 1;
}
k_i = tz->tzp->k_pu / 10;
tz->tzp->k_i = k_i > 0 ? k_i : 1;
/*
* The default for k_d and integral_cutoff is 0, so we can
@ -195,8 +186,7 @@ static u32 get_sustainable_power(struct thermal_zone_device *tz,
/* Check if it's init value 0 or there was update via sysfs */
if (sustainable_power != params->sustainable_power) {
estimate_pid_constants(tz, sustainable_power,
params->trip_switch_on, control_temp,
true);
params->trip_switch_on, control_temp);
/* Do the estimation only once and make available in sysfs */
tz->tzp->sustainable_power = sustainable_power;
@ -640,7 +630,7 @@ static int power_allocator_bind(struct thermal_zone_device *tz)
if (!ret)
estimate_pid_constants(tz, tz->tzp->sustainable_power,
params->trip_switch_on,
control_temp, false);
control_temp);
}
reset_pid_controller(params);