diff --git a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java
index c87e51e358911..37f0a64df6132 100644
--- a/core/java/android/view/KeyEvent.java
+++ b/core/java/android/view/KeyEvent.java
@@ -519,8 +519,13 @@ public class KeyEvent extends InputEvent implements Parcelable {
     /** Key code constant: Settings key.
      * Starts the system settings activity. */
     public static final int KEYCODE_SETTINGS        = 176;
-    /** Key code constant: TV power key.
-     * On TV remotes, toggles the power on a television screen. */
+    /**
+     * Key code constant: TV power key.
+     * On HDMI TV panel devices and Android TV devices that don't support HDMI, toggles the power
+     * state of the device.
+     * On HDMI source devices, toggles the power state of the HDMI-connected TV via HDMI-CEC and
+     * makes the source device follow this power state.
+     */
     public static final int KEYCODE_TV_POWER        = 177;
     /** Key code constant: TV input key.
      * On TV remotes, switches the input on a television screen. */
diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 6919ceaa5a9ff..d88f5cf672d92 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -3687,6 +3687,32 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                 break;
             }
 
+            case KeyEvent.KEYCODE_TV_POWER: {
+                result &= ~ACTION_PASS_TO_USER;
+                isWakeKey = false; // wake-up will be handled separately
+                HdmiControlManager hdmiControlManager = getHdmiControlManager();
+                if (hdmiControlManager != null && hdmiControlManager.shouldHandleTvPowerKey()) {
+                    if (down) {
+                        hdmiControlManager.toggleAndFollowTvPower();
+                    }
+                } else if (mHasFeatureLeanback) {
+                    KeyEvent fallbackEvent = KeyEvent.obtain(
+                            event.getDownTime(), event.getEventTime(),
+                            event.getAction(), KeyEvent.KEYCODE_POWER,
+                            event.getRepeatCount(), event.getMetaState(),
+                            event.getDeviceId(), event.getScanCode(),
+                            event.getFlags(), event.getSource(), event.getDisplayId(), null);
+                    if (down) {
+                        interceptPowerKeyDown(fallbackEvent, interactive);
+                    } else {
+                        interceptPowerKeyUp(fallbackEvent, interactive, canceled);
+                    }
+                }
+                // Ignore this key for any device that is not connected to a TV via HDMI and
+                // not an Android TV device.
+                break;
+            }
+
             case KeyEvent.KEYCODE_POWER: {
                 EventLogTags.writeInterceptPower(
                         KeyEvent.actionToString(event.getAction()),