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Commit 252868f7 authored by Junjie Wu's avatar Junjie Wu Committed by Rohit Gupta
Browse files

cpufreq: cpu-boost: Support separate input_boost_freq for different CPUs 



Different types of CPUs could have different frequency to satisfy same
input workload. Add support for using different input_boost_freq on
different CPUs.

input_boost_freq now either takes a single number which applies to all
CPUs, or cpuid:freq pairs separated by space for different CPUs.

Change-Id: I20506a9fbdb4d532d94168bbd61744595bebc8e5
Signed-off-by: default avatarJunjie Wu <junjiew@codeaurora.org>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarRohit Gupta <rohgup@codeaurora.org>
parent 33e5a0de

drivers/cpufreq/cpu-boost.c

+71 −4
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
struct cpu_sync {

	int cpu;

	unsigned int input_boost_min;

	unsigned int input_boost_freq;

};



static DEFINE_PER_CPU(struct cpu_sync, sync_info);
@@ -33,8 +34,7 @@ static struct workqueue_struct *cpu_boost_wq; 


static struct work_struct input_boost_work;



static unsigned int input_boost_freq;

module_param(input_boost_freq, uint, 0644);

static bool input_boost_enabled;



static unsigned int input_boost_ms = 40;

module_param(input_boost_ms, uint, 0644);
@@ -43,6 +43,73 @@ static struct delayed_work input_boost_rem; 
static u64 last_input_time;

#define MIN_INPUT_INTERVAL (150 * USEC_PER_MSEC)



static int set_input_boost_freq(const char *buf, const struct kernel_param *kp)

{

	int i, ntokens = 0;

	unsigned int val, cpu;

	const char *cp = buf;

	bool enabled = false;



	while ((cp = strpbrk(cp + 1, " :")))

		ntokens++;



	/* single number: apply to all CPUs */

	if (!ntokens) {

		if (sscanf(buf, "%u\n", &val) != 1)

			return -EINVAL;

		for_each_possible_cpu(i)

			per_cpu(sync_info, i).input_boost_freq = val;

		goto check_enable;

	}



	/* CPU:value pair */

	if (!(ntokens % 2))

		return -EINVAL;



	cp = buf;

	for (i = 0; i < ntokens; i += 2) {

		if (sscanf(cp, "%u:%u", &cpu, &val) != 2)

			return -EINVAL;

		if (cpu >= num_possible_cpus())

			return -EINVAL;



		per_cpu(sync_info, cpu).input_boost_freq = val;

		cp = strnchr(cp, PAGE_SIZE - (cp - buf), ' ');

		cp++;

	}



check_enable:

	for_each_possible_cpu(i) {

		if (per_cpu(sync_info, i).input_boost_freq) {

			enabled = true;

			break;

		}

	}

	input_boost_enabled = enabled;



	return 0;

}



static int get_input_boost_freq(char *buf, const struct kernel_param *kp)

{

	int cnt = 0, cpu;

	struct cpu_sync *s;



	for_each_possible_cpu(cpu) {

		s = &per_cpu(sync_info, cpu);

		cnt += snprintf(buf + cnt, PAGE_SIZE - cnt,

				"%d:%u ", cpu, s->input_boost_freq);

	}

	cnt += snprintf(buf + cnt, PAGE_SIZE - cnt, "\n");

	return cnt;

}



static const struct kernel_param_ops param_ops_input_boost_freq = {

	.set = set_input_boost_freq,

	.get = get_input_boost_freq,

};

module_param_cb(input_boost_freq, &param_ops_input_boost_freq, NULL, 0644);



/*

 * The CPUFREQ_ADJUST notifier is used to override the current policy min to

 * make sure policy min >= boost_min. The cpufreq framework then does the job
@@ -119,7 +186,7 @@ static void do_input_boost(struct work_struct *work) 
	pr_debug("Setting input boost min for all CPUs\n");

	for_each_possible_cpu(i) {

		i_sync_info = &per_cpu(sync_info, i);

		i_sync_info->input_boost_min = input_boost_freq;

		i_sync_info->input_boost_min = i_sync_info->input_boost_freq;

	}



	/* Update policies for all online CPUs */
@@ -134,7 +201,7 @@ static void cpuboost_input_event(struct input_handle *handle, 
{

	u64 now;



	if (!input_boost_freq)

	if (!input_boost_enabled)

		return;



	now = ktime_to_us(ktime_get());