diff --git a/media/java/android/media/tv/tunerresourcemanager/ITunerResourceManager.aidl b/media/java/android/media/tv/tunerresourcemanager/ITunerResourceManager.aidl
index b21bc89e2f375..77cac6ef7e2e9 100644
--- a/media/java/android/media/tv/tunerresourcemanager/ITunerResourceManager.aidl
+++ b/media/java/android/media/tv/tunerresourcemanager/ITunerResourceManager.aidl
@@ -20,6 +20,7 @@ import android.media.tv.tunerresourcemanager.CasSessionRequest;
 import android.media.tv.tunerresourcemanager.IResourcesReclaimListener;
 import android.media.tv.tunerresourcemanager.ResourceClientProfile;
 import android.media.tv.tunerresourcemanager.TunerDemuxRequest;
+import android.media.tv.tunerresourcemanager.TunerDescramblerRequest;
 import android.media.tv.tunerresourcemanager.TunerFrontendInfo;
 import android.media.tv.tunerresourcemanager.TunerFrontendRequest;
 import android.media.tv.tunerresourcemanager.TunerLnbRequest;
@@ -171,6 +172,30 @@ interface ITunerResourceManager {
      */
     boolean requestDemux(in TunerDemuxRequest request, out int[] demuxHandle);
 
+    /*
+     * This API is used by the Tuner framework to request an available descrambler from the
+     * TunerHAL.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is descrambler available, the API would send the handle back.
+     *
+     * <li>If no Descrambler is available but the current request info can show higher priority than
+     * other uses of Descrambler, the API will send
+     * {@link IResourcesReclaimListener#onReclaimResources()} to the {@link Tuner}. Tuner would
+     * handle the resource reclaim on the holder of lower priority and notify the holder of its
+     * resource loss.
+     *
+     * <li>If no Descrambler can be granted, the API would return false.
+     * <ul>
+     *
+     * @param request {@link TunerDescramblerRequest} information of the current request.
+     * @param descramblerHandle a one-element array to return the granted descrambler handle.
+     *
+     * @return true if there is Descrambler granted.
+     */
+    boolean requestDescrambler(in TunerDescramblerRequest request, out int[] descramblerHandle);
+
     /*
      * This API is used by the Tuner framework to request an available Cas session. This session
      * needs to be under the CAS system with the id indicated in the {@code request}.
@@ -242,6 +267,15 @@ interface ITunerResourceManager {
      */
     void releaseDemux(in int demuxHandle);
 
+    /*
+     * Notifies the TRM that the Descrambler with the given handle was released.
+     *
+     * <p>Client must call this whenever it releases a descrambler.
+     *
+     * @param demuxHandle the handle of the released Tuner Descrambler.
+     */
+    void releaseDescrambler(in int descramblerHandle);
+
     /*
      * Notifies the TRM that the given Cas session has been released.
      *
diff --git a/media/java/android/media/tv/tunerresourcemanager/TunerDescramblerRequest.aidl b/media/java/android/media/tv/tunerresourcemanager/TunerDescramblerRequest.aidl
new file mode 100644
index 0000000000000..fbafb3bc010e5
--- /dev/null
+++ b/media/java/android/media/tv/tunerresourcemanager/TunerDescramblerRequest.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media.tv.tunerresourcemanager;
+
+/**
+ * Information required to request a Tuner Descrambler.
+ *
+ * @hide
+ */
+parcelable TunerDescramblerRequest;
\ No newline at end of file
diff --git a/media/java/android/media/tv/tunerresourcemanager/TunerDescramblerRequest.java b/media/java/android/media/tv/tunerresourcemanager/TunerDescramblerRequest.java
new file mode 100644
index 0000000000000..58162879f8cfe
--- /dev/null
+++ b/media/java/android/media/tv/tunerresourcemanager/TunerDescramblerRequest.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media.tv.tunerresourcemanager;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+/**
+ * Information required to request a Tuner Descrambler.
+ *
+ * @hide
+ */
+public final class TunerDescramblerRequest implements Parcelable {
+    static final String TAG = "TunerDescramblerRequest";
+
+    public static final
+                @NonNull
+                Parcelable.Creator<TunerDescramblerRequest> CREATOR =
+                new Parcelable.Creator<TunerDescramblerRequest>() {
+                @Override
+                public TunerDescramblerRequest createFromParcel(Parcel source) {
+                    try {
+                        return new TunerDescramblerRequest(source);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception creating TunerDescramblerRequest from parcel", e);
+                        return null;
+                    }
+                }
+
+                @Override
+                public TunerDescramblerRequest[] newArray(int size) {
+                    return new TunerDescramblerRequest[size];
+                }
+            };
+
+    /**
+     * Client id of the client that sends the request.
+     */
+    private final int mClientId;
+
+    private TunerDescramblerRequest(@NonNull Parcel source) {
+        mClientId = source.readInt();
+    }
+
+    /**
+     * Constructs a new {@link TunerDescramblerRequest} with the given parameters.
+     *
+     * @param clientId id of the client.
+     */
+    public TunerDescramblerRequest(int clientId) {
+        mClientId = clientId;
+    }
+
+    /**
+     * Returns the id of the client.
+     */
+    public int getClientId() {
+        return mClientId;
+    }
+
+    // Parcelable
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder(128);
+        b.append("TunerDescramblerRequest {clientId=").append(mClientId);
+        b.append("}");
+        return b.toString();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mClientId);
+    }
+}
diff --git a/media/java/android/media/tv/tunerresourcemanager/TunerResourceManager.java b/media/java/android/media/tv/tunerresourcemanager/TunerResourceManager.java
index 1c1d7fab31073..524b6c2e26e12 100644
--- a/media/java/android/media/tv/tunerresourcemanager/TunerResourceManager.java
+++ b/media/java/android/media/tv/tunerresourcemanager/TunerResourceManager.java
@@ -291,6 +291,40 @@ public class TunerResourceManager {
         return result;
     }
 
+    /**
+     * Requests a Tuner Descrambler resource.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is Descrambler available, the API would send the handle back.
+     *
+     * <li>If no Descrambler is available but the current request has a higher priority than other
+     * uses of descramblers, the API will send
+     * {@link IResourcesReclaimListener#onReclaimResources()} to the {@link Tuner}. Tuner would
+     * handle the resource reclaim on the holder of lower priority and notify the holder of its
+     * resource loss.
+     *
+     * <li>If no Descrambler system can be granted, the API would return false.
+     * <ul>
+     *
+     * @param request {@link TunerDescramblerRequest} information of the current request.
+     * @param descramblerHandle a one-element array to return the granted Descrambler handle.
+     *                          If no Descrambler granted, this will return
+     *                          {@link #INVALID_RESOURCE_HANDLE}.
+     *
+     * @return true if there is Descrambler granted.
+     */
+    public boolean requestDescrambler(@NonNull TunerDescramblerRequest request,
+                @NonNull int[] descramblerHandle) {
+        boolean result = false;
+        try {
+            result = mService.requestDescrambler(request, descramblerHandle);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return result;
+    }
+
     /**
      * Requests a CAS session resource.
      *
@@ -391,6 +425,21 @@ public class TunerResourceManager {
         }
     }
 
+    /**
+     * Notifies the TRM that the Descrambler with the given handle has been released.
+     *
+     * <p>Client must call this whenever it releases an Descrambler.
+     *
+     * @param descramblerHandle the handle of the released Tuner Descrambler.
+     */
+    public void releaseDescrambler(int descramblerHandle) {
+        try {
+            mService.releaseDescrambler(descramblerHandle);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
     /**
      * Notifies the TRM that the given Cas session has been released.
      *
diff --git a/services/core/java/com/android/server/tv/tunerresourcemanager/TunerResourceManagerService.java b/services/core/java/com/android/server/tv/tunerresourcemanager/TunerResourceManagerService.java
index 2d3fc748b7fdc..b43d8b7daf4a4 100644
--- a/services/core/java/com/android/server/tv/tunerresourcemanager/TunerResourceManagerService.java
+++ b/services/core/java/com/android/server/tv/tunerresourcemanager/TunerResourceManagerService.java
@@ -25,6 +25,7 @@ import android.media.tv.tunerresourcemanager.IResourcesReclaimListener;
 import android.media.tv.tunerresourcemanager.ITunerResourceManager;
 import android.media.tv.tunerresourcemanager.ResourceClientProfile;
 import android.media.tv.tunerresourcemanager.TunerDemuxRequest;
+import android.media.tv.tunerresourcemanager.TunerDescramblerRequest;
 import android.media.tv.tunerresourcemanager.TunerFrontendInfo;
 import android.media.tv.tunerresourcemanager.TunerFrontendRequest;
 import android.media.tv.tunerresourcemanager.TunerLnbRequest;
@@ -198,6 +199,15 @@ public class TunerResourceManagerService extends SystemService {
             return true;
         }
 
+        @Override
+        public boolean requestDescrambler(@NonNull TunerDescramblerRequest request,
+                    @NonNull int[] descrambleHandle) {
+            if (DEBUG) {
+                Slog.d(TAG, "requestDescrambler(request=" + request + ")");
+            }
+            return true;
+        }
+
         @Override
         public boolean requestCasSession(
                 @NonNull CasSessionRequest request, @NonNull int[] sessionResourceId) {
@@ -230,6 +240,13 @@ public class TunerResourceManagerService extends SystemService {
             }
         }
 
+        @Override
+        public void releaseDescrambler(int descramblerHandle) {
+            if (DEBUG) {
+                Slog.d(TAG, "releaseDescrambler(descramblerHandle=" + descramblerHandle + ")");
+            }
+        }
+
         @Override
         public void releaseCasSession(int sessionResourceId) {
             if (DEBUG) {