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Power HAL: Remove sampling rate change

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Sampling rate change causes stutter while playing music.
Stutter appears randomly, but has a higher chance of appearing
when the screen goes from off to on.

Change-Id: I9b23212165203c7ff7ef65021be09fd366e55770
This commit is contained in:
Pawit Pornkitprasan 2012-09-30 18:24:57 +07:00
parent 5bff9aca16
commit 76a153a66c
1 changed files with 2 additions and 33 deletions
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35
exynos3/s5pc110/power/power.c
View file

@ -28,40 +28,14 @@
#include <hardware/power.h>
#define BOOSTPULSE_PATH "/sys/devices/system/cpu/cpufreq/ondemand/boostpulse"
#define SAMPLING_RATE_ONDEMAND "/sys/devices/system/cpu/cpufreq/ondemand/sampling_rate"
#define SAMPLING_RATE_SCREEN_ON "40000"
#define SAMPLING_RATE_SCREEN_OFF "400000"
struct s5pc110_power_module {
struct power_module base;
pthread_mutex_t lock;
int boostpulse_fd;
int boostpulse_warned;
char sampling_rate_screen_on[PROPERTY_VALUE_MAX];
char sampling_rate_screen_off[PROPERTY_VALUE_MAX];
};
static void sysfs_write(char *path, char *s)
{
char buf[80];
int len;
int fd = open(path, O_WRONLY);
if (fd < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", path, buf);
return;
}
len = write(fd, s, strlen(s));
if (len < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", path, buf);
}
close(fd);
}
static int boostpulse_open(struct s5pc110_power_module *s5pc110)
{
char buf[80];
@ -119,17 +93,12 @@ static void s5pc110_power_hint(struct power_module *module, power_hint_t hint,
static void s5pc110_power_set_interactive(struct power_module *module, int on)
{
struct s5pc110_power_module *s5pc110 = (struct s5pc110_power_module *) module;
sysfs_write(SAMPLING_RATE_ONDEMAND,
on ? s5pc110->sampling_rate_screen_on : s5pc110->sampling_rate_screen_off);
return;
}
static void s5pc110_power_init(struct power_module *module)
{
struct s5pc110_power_module *s5pc110 = (struct s5pc110_power_module *) module;
property_get("ro.sys.sampling_rate_on", s5pc110->sampling_rate_screen_on, SAMPLING_RATE_SCREEN_ON);
property_get("ro.sys.sampling_rate_off", s5pc110->sampling_rate_screen_off, SAMPLING_RATE_SCREEN_OFF);
sysfs_write(SAMPLING_RATE_ONDEMAND, s5pc110->sampling_rate_screen_on);
return;
}
static struct hw_module_methods_t power_module_methods = {