power: Allow device specific hooks for setMode, isModeSupported

* Some devices may want to implement custom hooks

Change-Id: Icb2d66471ec649a69b1e69849fd86282775052cb

Android.mk

@@ -83,6 +83,11 @@ endif
 
 endif  #  End of board specific list
 
+ifneq ($(TARGET_POWERHAL_MODE_EXT),)
+    LOCAL_CFLAGS += -DMODE_EXT
+    LOCAL_SRC_FILES += ../../../../$(TARGET_POWERHAL_MODE_EXT)
+endif
+
 ifneq ($(TARGET_POWERHAL_SET_INTERACTIVE_EXT),)
     LOCAL_CFLAGS += -DSET_INTERACTIVE_EXT
     LOCAL_SRC_FILES += ../../../../$(TARGET_POWERHAL_SET_INTERACTIVE_EXT)

Power.cpp

@@ -59,12 +59,22 @@ namespace hardware {
 namespace power {
 namespace impl {
 
+#ifdef MODE_EXT
+extern bool isDeviceSpecificModeSupported(Mode type, bool* _aidl_return);
+extern bool setDeviceSpecificMode(Mode type, bool enabled);
+#endif
+
 void setInteractive(bool interactive) {
    set_interactive(interactive ? 1:0);
 }
 
 ndk::ScopedAStatus Power::setMode(Mode type, bool enabled) {
     LOG(INFO) << "Power setMode: " << static_cast<int32_t>(type) << " to: " << enabled;
+#ifdef MODE_EXT
+    if (setDeviceSpecificMode(type, enabled)) {
+        return ndk::ScopedAStatus::ok();
+    }
+#endif
     switch(type){
 #ifdef TAP_TO_WAKE_NODE
         case Mode::DOUBLE_TAP_TO_WAKE:
@@ -105,6 +115,11 @@ ndk::ScopedAStatus Power::setMode(Mode type, bool enabled) {
 
 ndk::ScopedAStatus Power::isModeSupported(Mode type, bool* _aidl_return) {
     LOG(INFO) << "Power isModeSupported: " << static_cast<int32_t>(type);
+#ifdef MODE_EXT
+    if (isDeviceSpecificModeSupported(type, _aidl_return)) {
+        return ndk::ScopedAStatus::ok();
+    }
+#endif
     switch(type){
         case Mode::EXPENSIVE_RENDERING:
             if (is_expensive_rendering_supported()) {