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cpufreq: Use transition_delay_us for legacy governors as well
The policy->transition_delay_us field is used only by the schedutil governor currently, and this field describes how fast the driver wants the cpufreq governor to change CPUs frequency. It should rather be a common thing across all governors, as it doesn't have any schedutil dependency here. Create a new helper cpufreq_policy_transition_delay_us() to get the transition delay across all governors. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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parent
2d04503632
commit
aa7519af45
4 changed files with 18 additions and 18 deletions
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@ -524,6 +524,21 @@ unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
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}
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EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);
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unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy)
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{
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unsigned int latency;
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if (policy->transition_delay_us)
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return policy->transition_delay_us;
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latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
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if (latency)
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return latency * LATENCY_MULTIPLIER;
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return LATENCY_MULTIPLIER;
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}
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EXPORT_SYMBOL_GPL(cpufreq_policy_transition_delay_us);
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/*********************************************************************
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* SYSFS INTERFACE *
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*********************************************************************/
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@ -389,7 +389,6 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
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struct dbs_governor *gov = dbs_governor_of(policy);
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struct dbs_data *dbs_data;
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struct policy_dbs_info *policy_dbs;
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unsigned int latency;
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int ret = 0;
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/* State should be equivalent to EXIT */
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@ -428,13 +427,7 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
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if (ret)
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goto free_policy_dbs_info;
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/* policy latency is in ns. Convert it to us first */
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latency = policy->cpuinfo.transition_latency / 1000;
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if (latency == 0)
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latency = 1;
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/* Bring kernel and HW constraints together */
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dbs_data->sampling_rate = LATENCY_MULTIPLIER * latency;
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dbs_data->sampling_rate = cpufreq_policy_transition_delay_us(policy);
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if (!have_governor_per_policy())
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gov->gdbs_data = dbs_data;
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@ -523,6 +523,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
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unsigned int relation);
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unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
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unsigned int target_freq);
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unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy);
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int cpufreq_register_governor(struct cpufreq_governor *governor);
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void cpufreq_unregister_governor(struct cpufreq_governor *governor);
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@ -528,16 +528,7 @@ static int sugov_init(struct cpufreq_policy *policy)
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goto stop_kthread;
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}
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if (policy->transition_delay_us) {
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tunables->rate_limit_us = policy->transition_delay_us;
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} else {
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unsigned int lat;
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tunables->rate_limit_us = LATENCY_MULTIPLIER;
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lat = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
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if (lat)
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tunables->rate_limit_us *= lat;
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}
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tunables->rate_limit_us = cpufreq_policy_transition_delay_us(policy);
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policy->governor_data = sg_policy;
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sg_policy->tunables = tunables;
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