power: Add CPU boosting interface

 * Boosts CPU using Power HAL for the given duration.
 * Duration is given in microseconds.
 * Power HAL must implement POWER_HINT_CPU_BOOST.

Change-Id: Ic79baf7e3d0f75483c2fe8a242b4c3d93368b68b

5 files changed, 51 insertions, 0 deletions

diff --git a/core/java/android/os/IPowerManager.aidl b/core/java/android/os/IPowerManager.aidl
index 6d6d147..8dabfb3 100644
--- a/core/java/android/os/IPowerManager.aidl
+++ b/core/java/android/os/IPowerManager.aidl
@@ -51,4 +51,6 @@ interface IPowerManager
 
     // sets the attention light (used by phone app only)
     void setAttentionLight(boolean on, int color);
+
+    void cpuBoost(int duration);
 }
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index 4a01113..7a54102 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -604,6 +604,24 @@ public final class PowerManager {
     }
 
     /**
+     * Boost the CPU. Boosts the cpu for the given duration in microseconds.
+     * Requires the {@link android.Manifest.permission#CPU_BOOST} permission.
+     *
+     * @param duration in microseconds to boost the CPU
+     *
+     * @hide
+     */
+    public void cpuBoost(int duration)
+    {
+        try {
+            if (mService != null) {
+                mService.cpuBoost(duration);
+            }
+        } catch (RemoteException e) {
+        }
+    }
+
+    /**
      * A wake lock is a mechanism to indicate that your application needs
      * to have the device stay on.
      * <p>
diff --git a/services/java/com/android/server/power/PowerManagerService.java b/services/java/com/android/server/power/PowerManagerService.java
index 05e5aed..ac7293d 100644
--- a/services/java/com/android/server/power/PowerManagerService.java
+++ b/services/java/com/android/server/power/PowerManagerService.java
@@ -170,6 +170,9 @@ public final class PowerManagerService extends IPowerManager.Stub
     // effectively and terminate the dream.
     private static final int DREAM_BATTERY_LEVEL_DRAIN_CUTOFF = 5;
 
+    // Max time (microseconds) to allow a CPU boost for
+    private static final int MAX_CPU_BOOST_TIME = 5000000;
+
     private Context mContext;
     private LightsService mLightsService;
     private BatteryService mBatteryService;
@@ -367,6 +370,7 @@ public final class PowerManagerService extends IPowerManager.Stub
     private static native void nativeReleaseSuspendBlocker(String name);
     private static native void nativeSetInteractive(boolean enable);
     private static native void nativeSetAutoSuspend(boolean enable);
+    private static native void nativeCpuBoost(int duration);
 
     public PowerManagerService() {
         synchronized (mLock) {
@@ -1823,6 +1827,20 @@ public final class PowerManagerService extends IPowerManager.Stub
         }
     }
 
+    /**
+     * Boost the CPU
+     * @param duration Duration to boost the CPU for, in milliseconds.
+     * @hide
+     */
+    @Override // Binder call
+    public void cpuBoost(int duration) {
+        if (duration > 0 && duration <= MAX_CPU_BOOST_TIME) {
+            nativeCpuBoost(duration);
+        } else {
+            Log.e(TAG, "Invalid boost duration: " + duration);
+        }
+    }
+
     private void shutdownOrRebootInternal(final boolean shutdown, final boolean confirm,
             final String reason, boolean wait) {
         if (mHandler == null || !mSystemReady) {
diff --git a/services/jni/com_android_server_power_PowerManagerService.cpp b/services/jni/com_android_server_power_PowerManagerService.cpp
index 23c33af..58af5f1 100644
--- a/services/jni/com_android_server_power_PowerManagerService.cpp
+++ b/services/jni/com_android_server_power_PowerManagerService.cpp
@@ -204,6 +204,12 @@ static void nativeReboot(JNIEnv *env, jclass clazz, jstring reason) {
     jniThrowIOException(env, errno);
 }
 
+static void nativeCpuBoost(JNIEnv *env, jobject clazz, jint duration) {
+    // Tell the Power HAL to boost the CPU
+    if (gPowerModule && gPowerModule->powerHint) {
+        gPowerModule->powerHint(gPowerModule, POWER_HINT_CPU_BOOST, (void *) duration);
+    }
+}
 
 // ----------------------------------------------------------------------------
 
@@ -225,6 +231,8 @@ static JNINativeMethod gPowerManagerServiceMethods[] = {
             (void*) nativeShutdown },
     { "nativeReboot", "(Ljava/lang/String;)V",
             (void*) nativeReboot },
+    { "nativeCpuBoost", "(I)V",
+            (void*) nativeCpuBoost },
 };
 
 #define FIND_CLASS(var, className) \
diff --git a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java
index 1ccbc40..c0151cf 100644
--- a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java
+++ b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java
@@ -119,4 +119,9 @@ public class BridgePowerManager implements IPowerManager {
     public void wakeUp(long time) throws RemoteException {
         // pass for now.
     }
+
+    @Override
+    public void cpuBoost(int duration) throws RemoteException {
+        // pass for now
+    }
 }