gts3l-common: power: Merge power-ext function in the power HAL and apply ours

As we're building our power HAL ourselves, the
TARGET_POWERHAL_SET_INTERACTIVE_EXT flag doesn't working at all. So I
merged this feature to our power HAL to use the extension works, which
is disabling S-Pen panel, LCD, hardware touch key power.

Signed-off-by: Deokgyu Yang <secugyu@gmail.com>

BoardConfigCommon.mk

@@ -157,7 +157,6 @@ TARGET_PROVIDES_KEYMASTER := true
 
 # Power
 TARGET_USES_INTERACTION_BOOST := true
-TARGET_POWERHAL_SET_INTERACTIVE_EXT := $(COMMON_PATH)/power_ext/power_ext.c
 
 # Properties
 TARGET_SYSTEM_PROP += $(COMMON_PATH)/system.prop

power/Android.bp

@@ -24,6 +24,7 @@ cc_binary {
     srcs: [
         "service.cpp",
         "Power.cpp",
+        "power-ext.c",
         "power-helper.c",
         "metadata-parser.c",
         "utils.c",

power/power-ext.c

@@ -21,31 +21,13 @@
 #define LOG_TAG "PowerHAL_TR_Ext"
 #include <utils/Log.h>
 
+#include "utils.h"
+
 #define TOUCHKEY_POWER "/sys/class/input/input6/enabled"
 #define SPEN_POWER "/sys/class/input/input3/enabled"
 #define TSP_POWER "/sys/class/input/input2/enabled"
 #define LCD_POWER "/sys/class/power_supply/battery/lcd"
 
-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);
-}
-
 void power_set_interactive_ext(int on) {
     ALOGD("%s: %s input devices", __func__, on ? "enabling" : "disabling");
     sysfs_write(TSP_POWER, on ? "1" : "0");

power/power-helper.c

@@ -350,6 +350,9 @@ void power_set_interactive(int on)
     struct video_encode_metadata_t video_encode_metadata;
     int rc = 0;
 
+    /* Invoke the extension */
+    power_set_interactive_ext(on);
+
     if (set_interactive_override(on) == HINT_HANDLED) {
         return;
     }

power/power-helper.h

@@ -81,6 +81,9 @@ void power_hint(power_hint_t hint, void *data);
 void power_set_interactive(int on);
 int extract_platform_stats(uint64_t *list);
 
+// Get an extension function
+extern void power_set_interactive_ext(int on);
+
 #ifdef __cplusplus
 }
 #endif