diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-04-23 20:42:41 -0700 |
|---|---|---|
| committer | Todd Poynor <toddpoynor@google.com> | 2012-04-26 17:06:14 -0700 |
| commit | 9fb153153b508b260d62746e18a523d43acba180 (patch) | |
| tree | 30e5c791d59571b0c556c1e05bdb2d5a5dae2860 /drivers/cpufreq | |
| parent | 96aa0fc5ecfad49f891ed2085d16ee785500b49a (diff) | |
cpufreq: interactive: Add sysfs boost interface for hints from userspace
The explicit hint on/off version.
Change-Id: Ibf62b6d45bf6fb8c9c055b9bdaf074ce9374c04f
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq_interactive.c | 48 |
1 files changed, 44 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c index 69eeabb9679..c4390b27579 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -30,12 +30,11 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/input.h> +#include <asm/cputime.h> #define CREATE_TRACE_POINTS #include <trace/events/cpufreq_interactive.h> -#include <asm/cputime.h> - static atomic_t active_count = ATOMIC_INIT(0); struct cpufreq_interactive_cpuinfo { @@ -93,7 +92,7 @@ static unsigned long timer_rate; static unsigned long above_hispeed_delay_val; /* - * Boost to hispeed on touchscreen input. + * Boost pulse to hispeed on touchscreen input. */ static int input_boost_val; @@ -105,6 +104,12 @@ struct cpufreq_interactive_inputopen { static struct cpufreq_interactive_inputopen inputopen; +/* + * Non-zero means longer-term speed boost active. + */ + +static int boost_val; + static int cpufreq_governor_interactive(struct cpufreq_policy *policy, unsigned int event); @@ -188,7 +193,7 @@ static void cpufreq_interactive_timer(unsigned long data) if (load_since_change > cpu_load) cpu_load = load_since_change; - if (cpu_load >= go_hispeed_load) { + if (cpu_load >= go_hispeed_load || boost_val) { if (pcpu->target_freq <= pcpu->policy->min) { new_freq = hispeed_freq; } else { @@ -516,6 +521,12 @@ static void cpufreq_interactive_boost(void) wake_up_process(up_task); } +/* + * Pulsed boost on input event raises CPUs to hispeed_freq and lets + * usual algorithm of min_sample_time decide when to allow speed + * to drop. + */ + static void cpufreq_interactive_input_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) @@ -731,6 +742,34 @@ static ssize_t store_input_boost(struct kobject *kobj, struct attribute *attr, define_one_global_rw(input_boost); +static ssize_t show_boost(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", boost_val); +} + +static ssize_t store_boost(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long val; + + ret = kstrtoul(buf, 0, &val); + if (ret < 0) + return ret; + + boost_val = val; + + if (boost_val) + cpufreq_interactive_boost(); + else + trace_cpufreq_interactive_unboost(hispeed_freq); + + return count; +} + +define_one_global_rw(boost); + static struct attribute *interactive_attributes[] = { &hispeed_freq_attr.attr, &go_hispeed_load_attr.attr, @@ -738,6 +777,7 @@ static struct attribute *interactive_attributes[] = { &min_sample_time_attr.attr, &timer_rate_attr.attr, &input_boost.attr, + &boost.attr, NULL, }; |