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>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index 90db2c3..07b7caf 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -31,12 +31,11 @@
#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 {
@@ -94,7 +93,7 @@
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;
@@ -106,6 +105,12 @@
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);
@@ -189,7 +194,7 @@
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 {
@@ -517,6 +522,12 @@
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)
@@ -732,6 +743,34 @@
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,
@@ -739,6 +778,7 @@
&min_sample_time_attr.attr,
&timer_rate_attr.attr,
&input_boost.attr,
+ &boost.attr,
NULL,
};