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kernel: show kernel suspend info

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1. show kernel suspend info
2. sunch as: PM: suspend entry (deep) state=3(mem)

Change-Id: I031e40f0b88b2a8544bb56c24a55102560a520cf
Signed-off-by: ontim52 <ontim52@motorola.com>
Reviewed-on: https://gerrit.mot.com/2710376
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
ontim52 2023-08-16 10:34:32 +08:00 • committed by Xiaojun Ji
commit 8d2ad2e01e
1 changed files with 49 additions and 5 deletions
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54
kernel/power/suspend.c
View file

@ -32,6 +32,7 @@
#include <linux/compiler.h>
#include <linux/moduleparam.h>
#include <linux/wakeup_reason.h>
#include <linux/rtc.h>
#include "power.h"
@ -63,6 +64,46 @@ static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
enum s2idle_states __read_mostly s2idle_state;
static DEFINE_RAW_SPINLOCK(s2idle_lock);
const char *suspend_state_name[] = {
"ON",
"TO IDLE",
"STANDBY",
"MEM",
"MIN",
"MAX",
};
void print_time(bool running)
{
static ktime_t kt_boot0 = 0;
ktime_t kt_boot;
u32 rem;
unsigned long delta;
struct timespec ts;
struct rtc_time tm;
char sign = '-';
int tz_min = sys_tz.tz_minuteswest;
if (tz_min < 0) {
sign = '+';
tz_min = -tz_min;
}
kt_boot = ktime_get_boottime();
delta = div_u64(kt_boot - kt_boot0, NSEC_PER_SEC);
kt_boot0 = kt_boot;
kt_boot = div_u64_rem(kt_boot, NSEC_PER_SEC, &rem);
getnstimeofday(&ts);
ts.tv_sec -= sys_tz.tz_minuteswest * 60;
rtc_time_to_tm(ts.tv_sec, &tm);
pr_err("realtime: %u-%02u-%02u %02u:%02u:%02u.%06u UTC%c%02d:%02d boottime: %5lu.%06u %s: %lu\n",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(ts.tv_nsec / 1000),
sign, tz_min / 60, tz_min % 60,
(long)kt_boot, (int)rem / 1000, running ? "running" : "sleep", delta);
}
/**
* pm_suspend_default_s2idle - Check if suspend-to-idle is the default suspend.
*
@ -121,7 +162,7 @@ static void s2idle_enter(void)
static void s2idle_loop(void)
{
pm_pr_dbg("suspend-to-idle\n");
pr_err("suspend-to-idle\n");
/*
* Suspend-to-idle equals:
@ -144,7 +185,7 @@ static void s2idle_loop(void)
s2idle_enter();
}
pm_pr_dbg("resume from suspend-to-idle\n");
pr_err("resume from suspend-to-idle\n");
}
void s2idle_wake(void)
@ -325,7 +366,7 @@ static int suspend_test(int level)
{
#ifdef CONFIG_PM_DEBUG
if (pm_test_level == level) {
pr_info("suspend debug: Waiting for %d second(s).\n",
pr_err("suspend debug: Waiting for %d second(s).\n",
pm_test_delay);
mdelay(pm_test_delay * 1000);
return 1;
@ -636,7 +677,9 @@ int pm_suspend(suspend_state_t state)
return -EINVAL;
pm_suspend_marker("entry");
pr_info("suspend entry (%s)\n", mem_sleep_labels[state]);
pr_err("suspend entry (%s) state=%d (%s)\n", mem_sleep_labels[state], state,
state < ARRAY_SIZE(suspend_state_name) ? suspend_state_name[state] : "unknow");
print_time(true);
error = enter_state(state);
if (error) {
suspend_stats.fail++;
@ -645,7 +688,8 @@ int pm_suspend(suspend_state_t state)
suspend_stats.success++;
}
pm_suspend_marker("exit");
pr_info("suspend exit\n");
pr_err("suspend exit err=%d success=%d fail=%d\n", error, suspend_stats.success, suspend_stats.fail);
print_time(false);
return error;
}
EXPORT_SYMBOL(pm_suspend);