power: Add support for auto power modes
Do not disable input devices in case of the screen still
being enabled.
Change-Id: Ide6bd7ca3d41ac64b472c5e68fdc545c8f851b2b
diff --git a/power/power.c b/power/power.c
index b24251e..72298c6 100644
--- a/power/power.c
+++ b/power/power.c
@@ -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 @@
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 @@
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 @@
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;