From 720407ad06dbf4486ef6d724280640990d2fcd2a Mon Sep 17 00:00:00 2001
From: Jungshik Jang <jayjang@google.com>
Date: Mon, 15 Sep 2014 17:48:41 +0900
Subject: [PATCH] Fix cyclic mute

Bug: 17502271
Change-Id: I837315afce8193ac1948fffed66cbb8c755968e2
---
 .../java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java b/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java
index 859ef6847eb62..bd9f04bf5834e 100644
--- a/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java
+++ b/services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java
@@ -889,6 +889,12 @@ final class HdmiCecLocalDeviceTv extends HdmiCecLocalDevice {
     void changeMute(boolean mute) {
         assertRunOnServiceThread();
         HdmiLogger.debug("[A]:Change mute:%b", mute);
+        synchronized (mLock) {
+            if (mSystemAudioMute == mute) {
+                HdmiLogger.debug("No need to change mute.");
+                return;
+            }
+        }
         if (!isSystemAudioActivated()) {
             HdmiLogger.debug("[A]:System audio is not activated.");
             return;