Bug 932698 - Hold a wakelock when we receive the powey key to wake up device. r=dhylands

hal/gonk/GonkHal.cpp

@@ -68,6 +68,7 @@
 #include "UeventPoller.h"
 #include "nsIWritablePropertyBag2.h"
 #include <algorithm>
+#include "PowerWakeLock.h"
 
 #define LOG(args...)  __android_log_print(ANDROID_LOG_INFO, "Gonk", args)
 #define NsecPerMsec  1000000LL
@@ -667,6 +668,7 @@ void
 SetScreenEnabled(bool aEnabled)
 {
   GetGonkDisplay()->SetEnabled(aEnabled);
+  gPowerWakelock = nullptr;
   sScreenEnabled = aEnabled;
 }
 

widget/gonk/PowerWakeLock.cpp

@@ -0,0 +1,24 @@
+/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "PowerWakeLock.h"
+#include <hardware_legacy/power.h>
+
+const char* kPower_WAKE_LOCK_ID = "PowerKeyEvent";
+
+namespace mozilla {
+namespace hal_impl {
+StaticRefPtr <PowerWakelock> gPowerWakelock;
+PowerWakelock::PowerWakelock()
+{
+  acquire_wake_lock(PARTIAL_WAKE_LOCK, kPower_WAKE_LOCK_ID);
+}
+
+PowerWakelock::~PowerWakelock()
+{
+  release_wake_lock(kPower_WAKE_LOCK_ID);
+}
+} // hal_impl
+} // mozilla

widget/gonk/PowerWakeLock.h

@@ -0,0 +1,25 @@
+/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef __POWERWAKELOCK_H_
+#define __POWERWAKELOCK_H_
+
+#include "mozilla/StaticPtr.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace hal_impl {
+class PowerWakelock
+{
+public:
+  NS_INLINE_DECL_REFCOUNTING(PowerWakelock);
+  PowerWakelock();
+private:
+  ~PowerWakelock();
+};
+extern StaticRefPtr <PowerWakelock> gPowerWakelock;
+} // hal_impl
+} // mozilla
+#endif /* __POWERWAKELOCK_H_ */

widget/gonk/libui/EventHub.cpp

@@ -51,6 +51,12 @@
 #include <sys/limits.h>
 #include <sha1.h>
 
+#include "PowerWakeLock.h"
+#include "mozilla/Hal.h"
+using namespace mozilla;
+using namespace mozilla::hal;
+using namespace mozilla::hal_impl;
+
 /* this macro is used to tell if "bit" is set in "array"
  * it selects a byte from the array, and does a boolean AND
  * operation with a byte that only has the relevant bit set.
@@ -855,6 +861,10 @@ size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSiz
                         event->type = iev.type;
                         event->code = iev.code;
                         event->value = iev.value;
+			if (event->code == KEY_POWER && event->value
+                          && !hal::GetScreenEnabled()) {
+                          gPowerWakelock = new PowerWakelock();
+                        }
                         event += 1;
                         capacity -= 1;
                     }

widget/gonk/moz.build

@@ -17,6 +17,7 @@
 EXPORTS += [
     'GonkPermission.h',
     'OrientationObserver.h',
+    'PowerWakeLock.h',
 ]
 
 DIRS += ['libdisplay', 'nativewindow']
@@ -57,6 +58,7 @@ SOURCES += [
     'nsWindow.cpp',
     'OrientationObserver.cpp',
     'ParentProcessController.cpp',
+    'PowerWakeLock.cpp',
     'ProcessOrientation.cpp',
     'WidgetTraceEvent.cpp'
 ]