shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

ANDROID: cpufreq: interactive: Use idle-end notifiers

Browse Source 
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

[AmitP: Cherry-picked this patch from
        https://git.kernel.org/cgit/linux/kernel/git/vireshk/pm.git/log/?h=cpufreq/interactive-idle-notifier]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
This commit is contained in:
Viresh Kumar
2016-05-19 14:30:54 +05:30
committed by Dmitry Shmidt
parent c33cc8f298
commit 9dcfc2a39b
1 changed files with 39 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/cpufreq/cpufreq_interactive.c
View File

@@ -113,6 +113,7 @@ struct interactive_cpu {
struct irq_work irq_work;
u64 last_sample_time;
unsigned long next_sample_jiffies;
bool work_in_progress;
struct rw_semaphore enable_sem;
@@ -471,6 +472,26 @@ static void cpufreq_interactive_update(struct interactive_cpu *icpu)
slack_timer_resched(icpu, smp_processor_id(), true);
}
static void cpufreq_interactive_idle_end(void)
{
struct interactive_cpu *icpu = &per_cpu(interactive_cpu,
smp_processor_id());
if (!down_read_trylock(&icpu->enable_sem))
return;
if (icpu->ipolicy) {
/*
* We haven't sampled load for more than sampling_rate time, do
* it right now.
*/
if (time_after_eq(jiffies, icpu->next_sample_jiffies))
cpufreq_interactive_update(icpu);
}
up_read(&icpu->enable_sem);
}
static void cpufreq_interactive_get_policy_info(struct cpufreq_policy *policy,
unsigned int *pmax_freq,
u64 *phvt, u64 *pfvt)
@@ -989,6 +1010,19 @@ static struct kobj_type interactive_tunables_ktype = {
.sysfs_ops = &governor_sysfs_ops,
};
static int cpufreq_interactive_idle_notifier(struct notifier_block *nb,
unsigned long val, void *data)
{
if (val == IDLE_END)
cpufreq_interactive_idle_end();
return 0;
}
static struct notifier_block cpufreq_interactive_idle_nb = {
.notifier_call = cpufreq_interactive_idle_notifier,
};
/* Interactive Governor callbacks */
struct interactive_governor {
struct cpufreq_governor gov;
@@ -1031,6 +1065,8 @@ static void update_util_handler(struct update_util_data *data, u64 time,
return;
icpu->last_sample_time = time;
icpu->next_sample_jiffies = usecs_to_jiffies(tunables->sampling_rate) +
jiffies;
icpu->work_in_progress = true;
irq_work_queue(&icpu->irq_work);
@@ -1046,6 +1082,7 @@ static void gov_set_update_util(struct interactive_policy *ipolicy)
icpu = &per_cpu(interactive_cpu, cpu);
icpu->last_sample_time = 0;
icpu->next_sample_jiffies = 0;
cpufreq_add_update_util_hook(cpu, &icpu->update_util,
update_util_handler);
}
@@ -1176,6 +1213,7 @@ int cpufreq_interactive_init(struct cpufreq_policy *policy)
/* One time initialization for governor */
if (!interactive_gov.usage_count++) {
idle_notifier_register(&cpufreq_interactive_idle_nb);
cpufreq_register_notifier(&cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
}
@@ -1209,6 +1247,7 @@ void cpufreq_interactive_exit(struct cpufreq_policy *policy)
if (!--interactive_gov.usage_count) {
cpufreq_unregister_notifier(&cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
idle_notifier_unregister(&cpufreq_interactive_idle_nb);
}
count = gov_attr_set_put(&tunables->attr_set, &ipolicy->tunables_hook);