#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/string.h>
+#ifdef CONFIG_ROCKCHIP_CPUQUIET
+#include <linux/cpuquiet.h>
+#include <linux/pm_qos.h>
+#endif
#include <linux/rockchip/cpu.h>
#include <linux/rockchip/dvfs.h>
#include <asm/smp_plat.h>
static struct dvfs_node *clk_ddr_dvfs_node;
static struct cpumask *cluster_policy_mask[MAX_CLUSTERS];
+#ifdef CONFIG_ROCKCHIP_CPUQUIET
+static void rockchip_bl_balanced_cpufreq_transition(unsigned int cluster,
+ unsigned int cpu_freq);
+static struct cpuquiet_governor rockchip_bl_balanced_governor;
+#endif
+
/*******************************************************/
static inline int cpu_to_cluster(int cpu)
{
ret = clk_set_rate(clk, rate);
freqs.new = clk_get_rate(clk) / 1000;
+
+#ifdef CONFIG_ROCKCHIP_CPUQUIET
+ rockchip_bl_balanced_cpufreq_transition(cur_cluster, freqs.new);
+#endif
+
/* notifiers */
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
ret = cpufreq_register_driver(&rockchip_bl_cpufreq_driver);
+#ifdef CONFIG_ROCKCHIP_CPUQUIET
+ ret = cpuquiet_register_governor(&rockchip_bl_balanced_governor);
+#endif
+
return ret;
}
MODULE_AUTHOR("Xiao Feng <xf@rock-chips.com>");
MODULE_LICENSE("GPL");
+
+#ifdef CONFIG_ROCKCHIP_CPUQUIET
+extern struct cpumask hmp_slow_cpu_mask;
+
+enum cpu_speed_balance {
+ CPU_SPEED_BALANCED,
+ CPU_SPEED_BIASED,
+ CPU_SPEED_SKEWED,
+ CPU_SPEED_BOOST,
+};
+
+enum balanced_state {
+ IDLE,
+ DOWN,
+ UP,
+};
+
+struct idle_info {
+ u64 idle_last_us;
+ u64 idle_current_us;
+};
+
+static u64 idleinfo_timestamp_us;
+static u64 idleinfo_last_timestamp_us;
+static DEFINE_PER_CPU(struct idle_info, idleinfo);
+static DEFINE_PER_CPU(unsigned int, cpu_load);
+
+static struct timer_list load_timer;
+static bool load_timer_active;
+
+/* configurable parameters */
+static unsigned int balance_level = 60;
+static unsigned int idle_bottom_freq[MAX_CLUSTERS];
+static unsigned int idle_top_freq[MAX_CLUSTERS];
+static unsigned int cpu_freq[MAX_CLUSTERS];
+static unsigned long up_delay_jiffies;
+static unsigned long down_delay_jiffies;
+static unsigned long last_change_time_jiffies;
+static unsigned int load_sample_rate_jiffies = 20 / (MSEC_PER_SEC / HZ);
+static unsigned int little_high_load = 80;
+static unsigned int little_low_load = 20;
+static unsigned int big_low_load = 20;
+static struct workqueue_struct *rockchip_bl_balanced_wq;
+static struct delayed_work rockchip_bl_balanced_work;
+static enum balanced_state rockchip_bl_balanced_state;
+static struct kobject *rockchip_bl_balanced_kobj;
+static DEFINE_MUTEX(rockchip_bl_balanced_lock);
+static bool rockchip_bl_balanced_enable;
+
+#define GOVERNOR_NAME "bl_balanced"
+
+static u64 get_idle_us(int cpu)
+{
+ return get_cpu_idle_time(cpu, NULL, 1 /* io_busy */);
+}
+
+static void calculate_load_timer(unsigned long data)
+{
+ int i;
+ u64 elapsed_time;
+
+ if (!load_timer_active)
+ return;
+
+ idleinfo_last_timestamp_us = idleinfo_timestamp_us;
+ idleinfo_timestamp_us = ktime_to_us(ktime_get());
+ elapsed_time = idleinfo_timestamp_us - idleinfo_last_timestamp_us;
+
+ for_each_present_cpu(i) {
+ struct idle_info *iinfo = &per_cpu(idleinfo, i);
+ unsigned int *load = &per_cpu(cpu_load, i);
+ u64 idle_time;
+
+ iinfo->idle_last_us = iinfo->idle_current_us;
+ iinfo->idle_current_us = get_idle_us(i);
+
+ idle_time = iinfo->idle_current_us - iinfo->idle_last_us;
+ idle_time *= 100;
+ do_div(idle_time, elapsed_time);
+ if (idle_time > 100)
+ idle_time = 100;
+ *load = 100 - idle_time;
+ }
+ mod_timer(&load_timer, jiffies + load_sample_rate_jiffies);
+}
+
+static void start_load_timer(void)
+{
+ int i;
+
+ if (load_timer_active)
+ return;
+
+ idleinfo_timestamp_us = ktime_to_us(ktime_get());
+ for_each_present_cpu(i) {
+ struct idle_info *iinfo = &per_cpu(idleinfo, i);
+
+ iinfo->idle_current_us = get_idle_us(i);
+ }
+ mod_timer(&load_timer, jiffies + load_sample_rate_jiffies);
+
+ load_timer_active = true;
+}
+
+static void stop_load_timer(void)
+{
+ if (!load_timer_active)
+ return;
+
+ load_timer_active = false;
+ del_timer(&load_timer);
+}
+
+static unsigned int get_slowest_cpu(void)
+{
+ unsigned int cpu = nr_cpu_ids;
+ unsigned long minload = ULONG_MAX;
+ int i;
+
+ for_each_online_cpu(i) {
+ unsigned int load = per_cpu(cpu_load, i);
+
+ if ((i > 0) && (minload >= load)) {
+ cpu = i;
+ minload = load;
+ }
+ }
+
+ return cpu;
+}
+
+static unsigned int get_offline_big_cpu(void)
+{
+ struct cpumask big, offline_big;
+
+ cpumask_andnot(&big, cpu_present_mask, &hmp_slow_cpu_mask);
+ cpumask_andnot(&offline_big, &big, cpu_online_mask);
+ return cpumask_first(&offline_big);
+}
+
+static unsigned int cpu_highest_speed(void)
+{
+ unsigned int maxload = 0;
+ int i;
+
+ for_each_online_cpu(i) {
+ unsigned int load = per_cpu(cpu_load, i);
+
+ maxload = max(maxload, load);
+ }
+
+ return maxload;
+}
+
+static unsigned int count_slow_cpus(unsigned int limit)
+{
+ unsigned int cnt = 0;
+ int i;
+
+ for_each_online_cpu(i) {
+ unsigned int load = per_cpu(cpu_load, i);
+
+ if (load <= limit)
+ cnt++;
+ }
+
+ return cnt;
+}
+
+#define NR_FSHIFT 2
+
+static unsigned int rt_profile[NR_CPUS] = {
+/* 1, 2, 3, 4, 5, 6, 7, 8 - on-line cpus target */
+ 5, 9, 10, 11, 12, 13, 14, UINT_MAX
+};
+
+static unsigned int nr_run_hysteresis = 2; /* 0.5 thread */
+static unsigned int nr_run_last;
+
+struct runnables_avg_sample {
+ u64 previous_integral;
+ unsigned int avg;
+ bool integral_sampled;
+ u64 prev_timestamp; /* ns */
+};
+
+static DEFINE_PER_CPU(struct runnables_avg_sample, avg_nr_sample);
+
+static unsigned int get_avg_nr_runnables(void)
+{
+ unsigned int i, sum = 0;
+ struct runnables_avg_sample *sample;
+ u64 integral, old_integral, delta_integral, delta_time, cur_time;
+
+ cur_time = ktime_to_ns(ktime_get());
+
+ for_each_online_cpu(i) {
+ sample = &per_cpu(avg_nr_sample, i);
+ integral = nr_running_integral(i);
+ old_integral = sample->previous_integral;
+ sample->previous_integral = integral;
+ delta_time = cur_time - sample->prev_timestamp;
+ sample->prev_timestamp = cur_time;
+
+ if (!sample->integral_sampled) {
+ sample->integral_sampled = true;
+ /* First sample to initialize prev_integral, skip
+ * avg calculation
+ */
+ continue;
+ }
+
+ if (integral < old_integral) {
+ /* Overflow */
+ delta_integral = (ULLONG_MAX - old_integral) + integral;
+ } else {
+ delta_integral = integral - old_integral;
+ }
+
+ /* Calculate average for the previous sample window */
+ do_div(delta_integral, delta_time);
+ sample->avg = delta_integral;
+ sum += sample->avg;
+ }
+
+ return sum;
+}
+
+static bool rockchip_bl_balanced_speed_boost(void)
+{
+ unsigned int cpu;
+ struct cpumask online_little;
+ unsigned int big_cpu;
+ bool has_low_load_little_cpu = false;
+
+ if (cpu_freq[L_CLUSTER] < idle_top_freq[L_CLUSTER])
+ return false;
+
+ cpumask_and(&online_little, cpu_online_mask, &hmp_slow_cpu_mask);
+
+ for_each_cpu(cpu, &online_little) {
+ if (per_cpu(cpu_load, cpu) < little_low_load) {
+ has_low_load_little_cpu = true;
+ break;
+ }
+ }
+
+ for_each_cpu(cpu, &online_little) {
+ unsigned int load;
+ unsigned int avg;
+ struct cpumask online_big;
+ bool has_low_load_big_cpu;
+
+ load = per_cpu(cpu_load, cpu);
+ /* skip low load cpu */
+ if (load < little_high_load)
+ continue;
+
+ avg = per_cpu(avg_nr_sample, cpu).avg;
+ /*
+ * skip when we have low load cpu,
+ * when cpu load is high because run many task.
+ * we can migrate the task to low load cpu
+ */
+ if (has_low_load_little_cpu &&
+ (avg >> (FSHIFT - NR_FSHIFT)) >= 4)
+ continue;
+
+ /*
+ * found one cpu which is busy by run one thread,
+ * break if no big cpu offline
+ */
+ if (get_offline_big_cpu() >= nr_cpu_ids)
+ break;
+
+ cpumask_andnot(&online_big,
+ cpu_online_mask, &hmp_slow_cpu_mask);
+
+ has_low_load_big_cpu = false;
+ for_each_cpu(big_cpu, &online_big) {
+ unsigned int big_load;
+
+ big_load = per_cpu(cpu_load, big_cpu);
+ if (big_load < big_low_load) {
+ has_low_load_big_cpu = true;
+ break;
+ }
+ }
+ /* if we have idle big cpu, never up new one */
+ if (has_low_load_big_cpu)
+ break;
+
+ return true;
+ }
+
+ return false;
+}
+
+static enum cpu_speed_balance rockchip_bl_balanced_speed_balance(void)
+{
+ unsigned long highest_speed = cpu_highest_speed();
+ unsigned long balanced_speed = highest_speed * balance_level / 100;
+ unsigned long skewed_speed = balanced_speed / 2;
+ unsigned int nr_cpus = num_online_cpus();
+ unsigned int max_cpus = pm_qos_request(PM_QOS_MAX_ONLINE_CPUS);
+ unsigned int min_cpus = pm_qos_request(PM_QOS_MIN_ONLINE_CPUS);
+ unsigned int avg_nr_run = get_avg_nr_runnables();
+ unsigned int nr_run;
+
+ if (max_cpus > nr_cpu_ids || max_cpus == 0)
+ max_cpus = nr_cpu_ids;
+
+ if (rockchip_bl_balanced_speed_boost())
+ return CPU_SPEED_BOOST;
+
+ /* balanced: freq targets for all CPUs are above 60% of highest speed
+ biased: freq target for at least one CPU is below 60% threshold
+ skewed: freq targets for at least 2 CPUs are below 30% threshold */
+ for (nr_run = 1; nr_run < ARRAY_SIZE(rt_profile); nr_run++) {
+ unsigned int nr_threshold = rt_profile[nr_run - 1];
+
+ if (nr_run_last <= nr_run)
+ nr_threshold += nr_run_hysteresis;
+ if (avg_nr_run <= (nr_threshold << (FSHIFT - NR_FSHIFT)))
+ break;
+ }
+ nr_run_last = nr_run;
+
+ if ((count_slow_cpus(skewed_speed) >= 2 ||
+ nr_run < nr_cpus ||
+ (cpu_freq[B_CLUSTER] <= idle_bottom_freq[B_CLUSTER] &&
+ cpu_freq[L_CLUSTER] <= idle_bottom_freq[L_CLUSTER]) ||
+ nr_cpus > max_cpus) &&
+ nr_cpus > min_cpus)
+ return CPU_SPEED_SKEWED;
+
+ if ((count_slow_cpus(balanced_speed) >= 1 ||
+ nr_run <= nr_cpus ||
+ (cpu_freq[B_CLUSTER] <= idle_bottom_freq[B_CLUSTER] &&
+ cpu_freq[L_CLUSTER] <= idle_bottom_freq[L_CLUSTER]) ||
+ nr_cpus == max_cpus) &&
+ nr_cpus >= min_cpus)
+ return CPU_SPEED_BIASED;
+
+ return CPU_SPEED_BALANCED;
+}
+
+static void rockchip_bl_balanced_work_func(struct work_struct *work)
+{
+ bool up = false;
+ unsigned int cpu = nr_cpu_ids;
+ unsigned long now = jiffies;
+ struct workqueue_struct *wq = rockchip_bl_balanced_wq;
+ struct delayed_work *dwork = to_delayed_work(work);
+ enum cpu_speed_balance balance;
+
+ mutex_lock(&rockchip_bl_balanced_lock);
+
+ if (!rockchip_bl_balanced_enable)
+ goto out;
+
+ switch (rockchip_bl_balanced_state) {
+ case IDLE:
+ break;
+ case DOWN:
+ cpu = get_slowest_cpu();
+ if (cpu < nr_cpu_ids) {
+ up = false;
+ queue_delayed_work(wq, dwork, up_delay_jiffies);
+ } else {
+ stop_load_timer();
+ }
+ break;
+ case UP:
+ balance = rockchip_bl_balanced_speed_balance();
+ switch (balance) {
+ case CPU_SPEED_BOOST:
+ cpu = get_offline_big_cpu();
+ if (cpu < nr_cpu_ids)
+ up = true;
+ break;
+ /* cpu speed is up and balanced - one more on-line */
+ case CPU_SPEED_BALANCED:
+ cpu = cpumask_next_zero(0, cpu_online_mask);
+ if (cpu < nr_cpu_ids)
+ up = true;
+ break;
+ /* cpu speed is up, but skewed - remove one core */
+ case CPU_SPEED_SKEWED:
+ cpu = get_slowest_cpu();
+ if (cpu < nr_cpu_ids)
+ up = false;
+ break;
+ /* cpu speed is up, but under-utilized - do nothing */
+ case CPU_SPEED_BIASED:
+ default:
+ break;
+ }
+ queue_delayed_work(wq, dwork, up_delay_jiffies);
+ break;
+ default:
+ pr_err("%s: invalid cpuquiet governor state %d\n",
+ __func__, rockchip_bl_balanced_state);
+ }
+
+ if (!up && ((now - last_change_time_jiffies) < down_delay_jiffies))
+ cpu = nr_cpu_ids;
+
+ if (cpu < nr_cpu_ids) {
+ last_change_time_jiffies = now;
+ if (up)
+ cpuquiet_wake_cpu(cpu, false);
+ else
+ cpuquiet_quiesence_cpu(cpu, false);
+ }
+
+out:
+ mutex_unlock(&rockchip_bl_balanced_lock);
+}
+
+static void rockchip_bl_balanced_cpufreq_transition(unsigned int cluster,
+ unsigned int new_cpu_freq)
+{
+ struct workqueue_struct *wq;
+ struct delayed_work *dwork;
+
+ mutex_lock(&rockchip_bl_balanced_lock);
+
+ if (!rockchip_bl_balanced_enable)
+ goto out;
+
+ wq = rockchip_bl_balanced_wq;
+ dwork = &rockchip_bl_balanced_work;
+ cpu_freq[cluster] = new_cpu_freq;
+
+ switch (rockchip_bl_balanced_state) {
+ case IDLE:
+ if (cpu_freq[B_CLUSTER] >= idle_top_freq[B_CLUSTER] ||
+ cpu_freq[L_CLUSTER] >= idle_top_freq[L_CLUSTER]) {
+ rockchip_bl_balanced_state = UP;
+ queue_delayed_work(wq, dwork, up_delay_jiffies);
+ start_load_timer();
+ } else if (cpu_freq[B_CLUSTER] <= idle_bottom_freq[B_CLUSTER] &&
+ cpu_freq[L_CLUSTER] <= idle_bottom_freq[L_CLUSTER]) {
+ rockchip_bl_balanced_state = DOWN;
+ queue_delayed_work(wq, dwork, down_delay_jiffies);
+ start_load_timer();
+ }
+ break;
+ case DOWN:
+ if (cpu_freq[B_CLUSTER] >= idle_top_freq[B_CLUSTER] ||
+ cpu_freq[L_CLUSTER] >= idle_top_freq[L_CLUSTER]) {
+ rockchip_bl_balanced_state = UP;
+ queue_delayed_work(wq, dwork, up_delay_jiffies);
+ start_load_timer();
+ }
+ break;
+ case UP:
+ if (cpu_freq[B_CLUSTER] <= idle_bottom_freq[B_CLUSTER] &&
+ cpu_freq[L_CLUSTER] <= idle_bottom_freq[L_CLUSTER]) {
+ rockchip_bl_balanced_state = DOWN;
+ queue_delayed_work(wq, dwork, up_delay_jiffies);
+ start_load_timer();
+ }
+ break;
+ default:
+ pr_err("%s: invalid cpuquiet governor state %d\n",
+ __func__, rockchip_bl_balanced_state);
+ }
+
+out:
+ mutex_unlock(&rockchip_bl_balanced_lock);
+}
+
+static void delay_callback(struct cpuquiet_attribute *attr)
+{
+ unsigned long val;
+
+ if (attr) {
+ val = (*((unsigned long *)(attr->param)));
+ (*((unsigned long *)(attr->param))) = msecs_to_jiffies(val);
+ }
+}
+
+#define CPQ_BASIC_ATTRIBUTE_B(_name, _mode, _type) \
+ static struct cpuquiet_attribute _name ## _b_attr = { \
+ .attr = {.name = __stringify(_name ## _b), .mode = _mode },\
+ .show = show_ ## _type ## _attribute, \
+ .store = store_ ## _type ## _attribute, \
+ .param = &_name[B_CLUSTER], \
+}
+#define CPQ_BASIC_ATTRIBUTE_L(_name, _mode, _type) \
+ static struct cpuquiet_attribute _name ## _l_attr = { \
+ .attr = {.name = __stringify(_name ## _l), .mode = _mode },\
+ .show = show_ ## _type ## _attribute, \
+ .store = store_ ## _type ## _attribute, \
+ .param = &_name[L_CLUSTER], \
+}
+CPQ_BASIC_ATTRIBUTE(balance_level, 0644, uint);
+CPQ_BASIC_ATTRIBUTE_B(idle_bottom_freq, 0644, uint);
+CPQ_BASIC_ATTRIBUTE_L(idle_bottom_freq, 0644, uint);
+CPQ_BASIC_ATTRIBUTE_B(idle_top_freq, 0644, uint);
+CPQ_BASIC_ATTRIBUTE_L(idle_top_freq, 0644, uint);
+CPQ_BASIC_ATTRIBUTE(load_sample_rate_jiffies, 0644, uint);
+CPQ_BASIC_ATTRIBUTE(nr_run_hysteresis, 0644, uint);
+CPQ_BASIC_ATTRIBUTE(little_high_load, 0644, uint);
+CPQ_BASIC_ATTRIBUTE(little_low_load, 0644, uint);
+CPQ_BASIC_ATTRIBUTE(big_low_load, 0644, uint);
+CPQ_ATTRIBUTE(up_delay_jiffies, 0644, ulong, delay_callback);
+CPQ_ATTRIBUTE(down_delay_jiffies, 0644, ulong, delay_callback);
+
+#define MAX_BYTES 100
+
+static ssize_t show_rt_profile(struct cpuquiet_attribute *attr, char *buf)
+{
+ char buffer[MAX_BYTES];
+ unsigned int i;
+ int size = 0;
+
+ buffer[0] = 0;
+ for (i = 0; i < ARRAY_SIZE(rt_profile); i++) {
+ size += snprintf(buffer + size, sizeof(buffer) - size,
+ "%u ", rt_profile[i]);
+ }
+ return snprintf(buf, sizeof(buffer), "%s\n", buffer);
+}
+
+static ssize_t store_rt_profile(struct cpuquiet_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret, i = 0;
+ char *val, *str, input[MAX_BYTES];
+ unsigned int profile[ARRAY_SIZE(rt_profile)];
+
+ if (!count || count >= MAX_BYTES)
+ return -EINVAL;
+ strncpy(input, buf, count);
+ input[count] = '\0';
+ str = input;
+ memcpy(profile, rt_profile, sizeof(rt_profile));
+ while ((val = strsep(&str, " ")) != NULL) {
+ if (*val == '\0')
+ continue;
+ if (i == ARRAY_SIZE(rt_profile) - 1)
+ break;
+ ret = kstrtouint(val, 10, &profile[i]);
+ if (ret)
+ return -EINVAL;
+ i++;
+ }
+
+ memcpy(rt_profile, profile, sizeof(profile));
+
+ return count;
+}
+CPQ_ATTRIBUTE_CUSTOM(rt_profile, 0644,
+ show_rt_profile, store_rt_profile);
+
+static struct attribute *rockchip_bl_balanced_attributes[] = {
+ &balance_level_attr.attr,
+ &idle_bottom_freq_b_attr.attr,
+ &idle_bottom_freq_l_attr.attr,
+ &idle_top_freq_b_attr.attr,
+ &idle_top_freq_l_attr.attr,
+ &up_delay_jiffies_attr.attr,
+ &down_delay_jiffies_attr.attr,
+ &load_sample_rate_jiffies_attr.attr,
+ &nr_run_hysteresis_attr.attr,
+ &rt_profile_attr.attr,
+ &little_high_load_attr.attr,
+ &little_low_load_attr.attr,
+ &big_low_load_attr.attr,
+ NULL,
+};
+
+static const struct sysfs_ops rockchip_bl_balanced_sysfs_ops = {
+ .show = cpuquiet_auto_sysfs_show,
+ .store = cpuquiet_auto_sysfs_store,
+};
+
+static struct kobj_type rockchip_bl_balanced_ktype = {
+ .sysfs_ops = &rockchip_bl_balanced_sysfs_ops,
+ .default_attrs = rockchip_bl_balanced_attributes,
+};
+
+static int rockchip_bl_balanced_sysfs(void)
+{
+ int err;
+ struct kobject *kobj;
+
+ kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
+
+ if (!kobj)
+ return -ENOMEM;
+
+ err = cpuquiet_kobject_init(kobj, &rockchip_bl_balanced_ktype,
+ GOVERNOR_NAME);
+
+ if (err)
+ kfree(kobj);
+
+ rockchip_bl_balanced_kobj = kobj;
+
+ return err;
+}
+
+static void rockchip_bl_balanced_stop(void)
+{
+ mutex_lock(&rockchip_bl_balanced_lock);
+
+ rockchip_bl_balanced_enable = false;
+ /* now we can force the governor to be idle */
+ rockchip_bl_balanced_state = IDLE;
+
+ mutex_unlock(&rockchip_bl_balanced_lock);
+
+ cancel_delayed_work_sync(&rockchip_bl_balanced_work);
+
+ destroy_workqueue(rockchip_bl_balanced_wq);
+ rockchip_bl_balanced_wq = NULL;
+ del_timer_sync(&load_timer);
+
+ kobject_put(rockchip_bl_balanced_kobj);
+ kfree(rockchip_bl_balanced_kobj);
+ rockchip_bl_balanced_kobj = NULL;
+}
+
+static int rockchip_bl_balanced_start(void)
+{
+ int err, count, cluster;
+ struct cpufreq_frequency_table *table;
+ unsigned int initial_freq;
+
+ err = rockchip_bl_balanced_sysfs();
+ if (err)
+ return err;
+
+ up_delay_jiffies = msecs_to_jiffies(100);
+ down_delay_jiffies = msecs_to_jiffies(2000);
+
+ for (cluster = 0; cluster < MAX_CLUSTERS; cluster++) {
+ table = freq_table[cluster];
+ if (!table)
+ return -EINVAL;
+
+ for (count = 0; table[count].frequency != CPUFREQ_TABLE_END;
+ count++)
+ ;
+
+ if (count < 4)
+ return -EINVAL;
+
+ idle_top_freq[cluster] = table[(count / 2) - 1].frequency;
+ idle_bottom_freq[cluster] = table[(count / 2) - 2].frequency;
+ }
+
+ rockchip_bl_balanced_wq
+ = alloc_workqueue(GOVERNOR_NAME, WQ_UNBOUND | WQ_FREEZABLE, 1);
+ if (!rockchip_bl_balanced_wq)
+ return -ENOMEM;
+
+ INIT_DELAYED_WORK(&rockchip_bl_balanced_work,
+ rockchip_bl_balanced_work_func);
+
+ init_timer(&load_timer);
+ load_timer.function = calculate_load_timer;
+
+ mutex_lock(&rockchip_bl_balanced_lock);
+ rockchip_bl_balanced_enable = true;
+ if (clk_cpu_dvfs_node[L_CLUSTER])
+ cpu_freq[L_CLUSTER] =
+ clk_get_rate(clk_cpu_dvfs_node[L_CLUSTER]->clk) / 1000;
+ if (clk_cpu_dvfs_node[B_CLUSTER])
+ cpu_freq[B_CLUSTER] =
+ clk_get_rate(clk_cpu_dvfs_node[B_CLUSTER]->clk) / 1000;
+ mutex_unlock(&rockchip_bl_balanced_lock);
+
+ /* Kick start the state machine */
+ initial_freq = cpufreq_get(0);
+ if (initial_freq)
+ rockchip_bl_balanced_cpufreq_transition(L_CLUSTER,
+ initial_freq);
+
+ return 0;
+}
+
+static struct cpuquiet_governor rockchip_bl_balanced_governor = {
+ .name = GOVERNOR_NAME,
+ .start = rockchip_bl_balanced_start,
+ .stop = rockchip_bl_balanced_stop,
+ .owner = THIS_MODULE,
+};
+#endif
projects / firefly-linux-kernel-4.4.55.git / commitdiff