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cpufreq: Use CPUFREQ_RELATION_E in DVFS governors

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Let the governors schedutil, conservative and ondemand to work, if possible
on efficient frequencies only.

Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Vincent Donnefort 2021-09-08 15:05:29 +01:00 committed by Rafael J. Wysocki
parent 1f39fa0dcc
commit b894d20e68
4 changed files with 18 additions and 10 deletions
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2
drivers/cpufreq/cpufreq.c
View File

@ -554,7 +554,7 @@ static unsigned int __resolve_freq(struct cpufreq_policy *policy,
unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
unsigned int target_freq)
{
return __resolve_freq(policy, target_freq, CPUFREQ_RELATION_L);
return __resolve_freq(policy, target_freq, CPUFREQ_RELATION_LE);
}
EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);

6
drivers/cpufreq/cpufreq_conservative.c
View File

@ -111,7 +111,8 @@ static unsigned int cs_dbs_update(struct cpufreq_policy *policy)
if (requested_freq > policy->max)
requested_freq = policy->max;
__cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_H);
__cpufreq_driver_target(policy, requested_freq,
CPUFREQ_RELATION_HE);
dbs_info->requested_freq = requested_freq;
goto out;
}
@ -134,7 +135,8 @@ static unsigned int cs_dbs_update(struct cpufreq_policy *policy)
else
requested_freq = policy->min;
__cpufreq_driver_target(policy, requested_freq, CPUFREQ_RELATION_L);
__cpufreq_driver_target(policy, requested_freq,
CPUFREQ_RELATION_LE);
dbs_info->requested_freq = requested_freq;
}

10
drivers/cpufreq/cpufreq_ondemand.c
View File

@ -120,12 +120,12 @@ static void dbs_freq_increase(struct cpufreq_policy *policy, unsigned int freq)
if (od_tuners->powersave_bias)
freq = od_ops.powersave_bias_target(policy, freq,
CPUFREQ_RELATION_H);
CPUFREQ_RELATION_HE);
else if (policy->cur == policy->max)
return;
__cpufreq_driver_target(policy, freq, od_tuners->powersave_bias ?
CPUFREQ_RELATION_L : CPUFREQ_RELATION_H);
CPUFREQ_RELATION_LE : CPUFREQ_RELATION_HE);
}
/*
@ -163,9 +163,9 @@ static void od_update(struct cpufreq_policy *policy)
if (od_tuners->powersave_bias)
freq_next = od_ops.powersave_bias_target(policy,
freq_next,
CPUFREQ_RELATION_L);
CPUFREQ_RELATION_LE);
__cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_C);
__cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_CE);
}
}
@ -184,7 +184,7 @@ static unsigned int od_dbs_update(struct cpufreq_policy *policy)
*/
if (sample_type == OD_SUB_SAMPLE && policy_dbs->sample_delay_ns > 0) {
__cpufreq_driver_target(policy, dbs_info->freq_lo,
CPUFREQ_RELATION_H);
CPUFREQ_RELATION_HE);
return dbs_info->freq_lo_delay_us;
}

10
include/linux/cpufreq.h
View File

@ -283,6 +283,10 @@ static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy
/* relation flags */
#define CPUFREQ_RELATION_E BIT(2) /* Get if possible an efficient frequency */
#define CPUFREQ_RELATION_LE (CPUFREQ_RELATION_L | CPUFREQ_RELATION_E)
#define CPUFREQ_RELATION_HE (CPUFREQ_RELATION_H | CPUFREQ_RELATION_E)
#define CPUFREQ_RELATION_CE (CPUFREQ_RELATION_C | CPUFREQ_RELATION_E)
struct freq_attr {
struct attribute attr;
ssize_t (*show)(struct cpufreq_policy *, char *);
@ -636,9 +640,11 @@ struct cpufreq_governor *cpufreq_fallback_governor(void);
static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy)
{
if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_HE);
else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_LE);
}
/* Governor attribute set */