diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index 4635a2b..81d059e 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -447,6 +447,8 @@
         CellBroadcastMessageFiltered cb_message_filtered =
             278 [(module) = "cellbroadcast"];
         TvTunerDvrStatus tv_tuner_dvr_status = 279 [(module) = "framework"];
+        TvCasSessionOpenStatus tv_cas_session_open_status =
+            280 [(module) = "framework"];
 
         // StatsdStats tracks platform atoms with ids upto 500.
         // Update StatsdStats::kMaxPushedAtomId when atom ids here approach that value.
@@ -9273,6 +9275,28 @@
     // indicate how many overflow or underflow happened between started to stopped
     optional int32 overflow_underflow_count = 5;
 }
+
+/**
+ * Logs when a cas session opened through MediaCas.
+ * This is atom ID 280.
+ *
+ * Logged from:
+ *   frameworks/base/media/java/android/media/MediaCas.java
+ */
+message TvCasSessionOpenStatus {
+    enum State {
+        UNKNOWN = 0;
+        SUCCEEDED = 1; // indicate that the session is opened successfully.
+        FAILED = 2; // indicate that the session isn’t opened successfully.
+    }
+    // The uid of the application that sent this custom atom.
+    optional int32 uid = 1 [(is_uid) = true];
+    //  Cas system Id
+    optional int32 cas_system_id = 2;
+    // State of the session
+    optional State state = 3;
+}
+
 /**
  * Logs when an app is frozen or unfrozen.
  *
diff --git a/media/java/android/media/MediaCas.java b/media/java/android/media/MediaCas.java
index c652628..590def4 100644
--- a/media/java/android/media/MediaCas.java
+++ b/media/java/android/media/MediaCas.java
@@ -20,6 +20,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.TestApi;
+import android.app.ActivityManager;
 import android.content.Context;
 import android.hardware.cas.V1_0.HidlCasPluginDescriptor;
 import android.hardware.cas.V1_0.ICas;
@@ -43,6 +44,8 @@
 import android.util.Log;
 import android.util.Singleton;
 
+import com.android.internal.util.FrameworkStatsLog;
+
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
@@ -122,6 +125,7 @@
     private String mTvInputServiceSessionId;
     private int mClientId;
     private int mCasSystemId;
+    private int mUserId;
     private TunerResourceManager mTunerResourceManager = null;
     private final Map<Session, Integer> mSessionMap = new HashMap<>();
 
@@ -673,6 +677,8 @@
      */
     public MediaCas(int CA_system_id) throws UnsupportedCasException {
         try {
+            mCasSystemId = CA_system_id;
+            mUserId = ActivityManager.getCurrentUser();
             IMediaCasService service = getService();
             android.hardware.cas.V1_2.IMediaCasService serviceV12 =
                     android.hardware.cas.V1_2.IMediaCasService.castFrom(service);
@@ -721,7 +727,6 @@
         this(casSystemId);
 
         Objects.requireNonNull(context, "context must not be null");
-        mCasSystemId = casSystemId;
         mTunerResourceManager = (TunerResourceManager)
                 context.getSystemService(Context.TV_TUNER_RESOURCE_MGR_SERVICE);
         if (mTunerResourceManager != null) {
@@ -925,10 +930,18 @@
             mICas.openSession(cb);
             MediaCasException.throwExceptionIfNeeded(cb.mStatus);
             addSessionToResourceMap(cb.mSession, sessionResourceHandle);
+            Log.d(TAG, "Write Stats Log for succeed to Open Session.");
+            FrameworkStatsLog
+                    .write(FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS, mUserId, mCasSystemId,
+                        FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS__STATE__SUCCEEDED);
             return cb.mSession;
         } catch (RemoteException e) {
             cleanupAndRethrowIllegalState();
         }
+        Log.d(TAG, "Write Stats Log for fail to Open Session.");
+        FrameworkStatsLog
+                .write(FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS, mUserId, mCasSystemId,
+                    FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS__STATE__FAILED);
         return null;
     }
 
@@ -964,10 +977,18 @@
             mICasV12.openSession_1_2(sessionUsage, scramblingMode, cb);
             MediaCasException.throwExceptionIfNeeded(cb.mStatus);
             addSessionToResourceMap(cb.mSession, sessionResourceHandle);
+            Log.d(TAG, "Write Stats Log for succeed to Open Session.");
+            FrameworkStatsLog
+                    .write(FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS, mUserId, mCasSystemId,
+                        FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS__STATE__SUCCEEDED);
             return cb.mSession;
         } catch (RemoteException e) {
             cleanupAndRethrowIllegalState();
         }
+        Log.d(TAG, "Write Stats Log for fail to Open Session.");
+        FrameworkStatsLog
+                .write(FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS, mUserId, mCasSystemId,
+                    FrameworkStatsLog.TV_CAS_SESSION_OPEN_STATUS__STATE__FAILED);
         return null;
     }