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power: Add support for auto power modes

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Do not disable input devices in case of the screen still
being enabled.

Change-Id: Ide6bd7ca3d41ac64b472c5e68fdc545c8f851b2b
This commit is contained in:
Christopher N. Hesse 2016-07-11 15:48:35 +02:00 committed by Gerrit Code Review
parent 8a13740477
commit 3360b09389
1 changed files with 37 additions and 4 deletions
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41
power/power.c
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@ -17,6 +17,7 @@
* limitations under the License.
*/
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
@ -44,6 +45,8 @@
#define CPU4_HISPEED_FREQ_PATH "/sys/devices/system/cpu/cpu4/cpufreq/interactive/hispeed_freq"
#define CPU4_MAX_FREQ_PATH "/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq"
#define PANEL_BRIGHTNESS "/sys/class/backlight/panel/brightness"
struct samsung_power_module {
struct power_module base;
pthread_mutex_t lock;
@ -121,6 +124,29 @@ static void sysfs_write(const char *path, char *s)
close(fd);
}
static unsigned int read_panel_brightness() {
unsigned int ret = 0;
int read_status;
// brightness can range from 0 to 255, so max. 3 chars + '\0'
char panel_brightness[4];
read_status = sysfs_read(PANEL_BRIGHTNESS, panel_brightness, sizeof(PANEL_BRIGHTNESS));
if (read_status < 0) {
ALOGE("%s: Failed to read panel brightness from %s!\n", __func__, PANEL_BRIGHTNESS);
return -1;
}
for (unsigned int i = 0; i < (sizeof(panel_brightness) / sizeof(panel_brightness[0])); i++) {
if (isdigit(panel_brightness[i])) {
ret += (panel_brightness[i] - '0');
}
}
ALOGV("%s: Panel brightness is: %d", __func__, ret);
return ret;
}
/**********************************************************
*** POWER FUNCTIONS
**********************************************************/
@ -338,11 +364,19 @@ static void samsung_power_set_interactive(struct power_module *module, int on)
struct stat sb;
char buf[80];
char touchkey_node[2];
int touchkey_enabled;
int rc;
ALOGV("power_set_interactive: %d\n", on);
// Do not disable any input devices if the screen is on but we are in a non-interactive state
if (!on) {
if (read_panel_brightness() > 0) {
ALOGV("%s: Moving to non-interactive state, but screen is still on,"
" not disabling input devices\n", __func__);
goto out;
}
}
sysfs_write(samsung_pwr->touchscreen_power_path, on ? "1" : "0");
rc = stat(samsung_pwr->touchkey_power_path, &sb);
@ -353,13 +387,12 @@ static void samsung_power_set_interactive(struct power_module *module, int on)
if (!on) {
if (sysfs_read(samsung_pwr->touchkey_power_path, touchkey_node,
sizeof(touchkey_node)) == 0) {
touchkey_enabled = touchkey_node[0] - '0';
/*
* If touchkey_enabled is 0, the keys have been disabled by another component
* If touchkey_node is 0, the keys have been disabled by another component
* (for example cmhw), which means we don't want them to be enabled when resuming
* from suspend.
*/
if (touchkey_enabled == 0) {
if ((touchkey_node[0] - '0') == 0) {
samsung_pwr->touchkey_blocked = true;
} else {
samsung_pwr->touchkey_blocked = false;