diff --git a/core/java/android/app/SystemServiceRegistry.java b/core/java/android/app/SystemServiceRegistry.java
index 50b9d6b47e020..8b07418668bad 100644
--- a/core/java/android/app/SystemServiceRegistry.java
+++ b/core/java/android/app/SystemServiceRegistry.java
@@ -109,6 +109,8 @@ import android.media.session.MediaSessionManager;
 import android.media.soundtrigger.SoundTriggerManager;
 import android.media.tv.ITvInputManager;
 import android.media.tv.TvInputManager;
+import android.media.tv.tuner.ITunerResourceManager;
+import android.media.tv.tuner.TunerResourceManager;
 import android.net.ConnectivityDiagnosticsManager;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityThread;
@@ -937,6 +939,17 @@ public final class SystemServiceRegistry {
                 return new TvInputManager(service, ctx.getUserId());
             }});
 
+        registerService(Context.TV_TUNER_RESOURCE_MGR_SERVICE, TunerResourceManager.class,
+                new CachedServiceFetcher<TunerResourceManager>() {
+            @Override
+            public TunerResourceManager createService(ContextImpl ctx)
+                    throws ServiceNotFoundException {
+                IBinder iBinder =
+                        ServiceManager.getServiceOrThrow(Context.TV_TUNER_RESOURCE_MGR_SERVICE);
+                ITunerResourceManager service = ITunerResourceManager.Stub.asInterface(iBinder);
+                return new TunerResourceManager(service, ctx.getUserId());
+            }});
+
         registerService(Context.NETWORK_SCORE_SERVICE, NetworkScoreManager.class,
                 new CachedServiceFetcher<NetworkScoreManager>() {
             @Override
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index 249e58244870d..49f62f4078068 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -3457,6 +3457,7 @@ public abstract class Context {
             CONSUMER_IR_SERVICE,
             //@hide: TRUST_SERVICE,
             TV_INPUT_SERVICE,
+            //@hide: TV_TUNER_RESOURCE_MGR_SERVICE,
             //@hide: NETWORK_SCORE_SERVICE,
             USAGE_STATS_SERVICE,
             MEDIA_SESSION_SERVICE,
@@ -4756,6 +4757,17 @@ public abstract class Context {
      */
     public static final String TV_INPUT_SERVICE = "tv_input";
 
+    /**
+     * Use with {@link #getSystemService(String)} to retrieve a
+     * {@link android.media.tv.TunerResourceManager} for interacting with TV
+     * tuner resources on the device.
+     *
+     * @see #getSystemService(String)
+     * @see android.media.tv.TunerResourceManager
+     * @hide
+     */
+    public static final String TV_TUNER_RESOURCE_MGR_SERVICE = "tv_tuner_resource_mgr";
+
     /**
      * {@link android.net.NetworkScoreManager} for managing network scoring.
      * @see #getSystemService(String)
diff --git a/media/java/android/media/tv/tuner/CasSessionRequest.aidl b/media/java/android/media/tv/tuner/CasSessionRequest.aidl
new file mode 100644
index 0000000000000..3dbf3d836ff34
--- /dev/null
+++ b/media/java/android/media/tv/tuner/CasSessionRequest.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.tuner;
+
+/**
+ * A wrapper of a cas session requests that contains all the request info of the client.
+ *
+ * @hide
+ */
+parcelable CasSessionRequest;
\ No newline at end of file
diff --git a/media/java/android/media/tv/tuner/CasSessionRequest.java b/media/java/android/media/tv/tuner/CasSessionRequest.java
new file mode 100644
index 0000000000000..0f6a885dec61f
--- /dev/null
+++ b/media/java/android/media/tv/tuner/CasSessionRequest.java
@@ -0,0 +1,114 @@
+/*
+ * 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.tuner;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+/**
+ * Information required to request a Cas Session.
+ *
+ * @hide
+ */
+public final class CasSessionRequest implements Parcelable {
+    static final String TAG = "CasSessionRequest";
+
+    public static final
+                @NonNull
+                Parcelable.Creator<CasSessionRequest> CREATOR =
+                new Parcelable.Creator<CasSessionRequest>() {
+                @Override
+                public CasSessionRequest createFromParcel(Parcel source) {
+                    try {
+                        return new CasSessionRequest(source);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception creating CasSessionRequest from parcel", e);
+                        return null;
+                    }
+                }
+
+                @Override
+                public CasSessionRequest[] newArray(int size) {
+                    return new CasSessionRequest[size];
+                }
+            };
+
+    /**
+     * Client id of the client that sends the request.
+     */
+    private final int mClientId;
+
+    /**
+     * System id of the requested cas.
+     */
+    private final int mCasSystemId;
+
+    private CasSessionRequest(@NonNull Parcel source) {
+        mClientId = source.readInt();
+        mCasSystemId = source.readInt();
+    }
+
+    /**
+     * Constructs a new {@link CasSessionRequest} with the given parameters.
+     *
+     * @param clientId id of the client.
+     * @param casSystemId the cas system id that the client is requesting.
+     */
+    public CasSessionRequest(int clientId,
+                             int casSystemId) {
+        mClientId = clientId;
+        mCasSystemId = casSystemId;
+    }
+
+    /**
+     * Returns the id of the client.
+     */
+    public int getClientId() {
+        return mClientId;
+    }
+
+    /**
+     * Returns the cas system id requested.
+     */
+    public int getCasSystemId() {
+        return mCasSystemId;
+    }
+
+    // Parcelable
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder(128);
+        b.append("CasSessionRequest {clientId=").append(mClientId);
+        b.append(", casSystemId=").append(mCasSystemId);
+        b.append("}");
+        return b.toString();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mClientId);
+        dest.writeInt(mCasSystemId);
+    }
+}
diff --git a/media/java/android/media/tv/tuner/ITunerResourceManager.aidl b/media/java/android/media/tv/tuner/ITunerResourceManager.aidl
new file mode 100644
index 0000000000000..758c68949b657
--- /dev/null
+++ b/media/java/android/media/tv/tuner/ITunerResourceManager.aidl
@@ -0,0 +1,244 @@
+/*
+ * 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.tuner;
+
+import android.media.tv.tuner.CasSessionRequest;
+import android.media.tv.tuner.ITunerResourceManagerListener;
+import android.media.tv.tuner.ResourceClientProfile;
+import android.media.tv.tuner.TunerFrontendInfo;
+import android.media.tv.tuner.TunerFrontendRequest;
+import android.media.tv.tuner.TunerLnbRequest;
+
+/**
+ * Interface of the Tuner Resource Manager. It manages resources used by TV Tuners.
+ * <p>Resources include:
+ * <ul>
+ * <li>TunerFrontend {@link android.media.tv.tuner.frontend}.
+ * <li>TunerLnb {@link android.media.tv.tuner.Lnb}.
+ * <li>MediaCas {@link android.media.MediaCas}.
+ * <li>TvInputHardware {@link android.media.tv.TvInputHardwareInfo}.
+ * <ul>
+ *
+ * <p>Expected workflow is:
+ * <ul>
+ * <li>Tuner Java/MediaCas/TIF update resources of the current device with TRM.
+ * <li>Client registers its profile through {@link #registerClientProfile(ResourceClientProfile,
+ * ITunerResourceManagerListener, int[])}.
+ * <li>Client requests resources through request APIs.
+ * <li>If the resource needs to be handed to a higher priority client from a lower priority
+ * one, TRM calls ITunerResourceManagerListener registered by the lower priority client to release
+ * the resource.
+ * <ul>
+ *
+ * @hide
+ */
+interface ITunerResourceManager {
+    /*
+     * This API is used by the client to register their profile with the Tuner Resource manager.
+     *
+     * <p>The profile contains information that can show the base priority score of the client.
+     *
+     * @param profile {@link ResourceClientProfile} profile of the current client
+     * @param listener {@link ITunerResourceManagerListener} a callback to
+     *                 reclaim clients' resources when needed.
+     * @param clientId returns a clientId from the resource manager when the
+     *                 the client registers its profile.
+     */
+    void registerClientProfile(in ResourceClientProfile profile,
+        ITunerResourceManagerListener listener, out int[] clientId);
+
+    /*
+     * This API is used by the client to unregister their profile with the Tuner Resource manager.
+     *
+     * @param clientId the client id that needs to be unregistered.
+     */
+    void unregisterClientProfile(in int clientId);
+
+    /*
+     * Updates a registered client's priority and niceValue.
+     *
+     * @param clientId the id of the client that is updating its profile.
+     * @param priority the priority that the client would like to update to.
+     * @param niceValue the nice value that the client would like to update to.
+     *
+     * @return true if the update is successful.
+     */
+    boolean updateClientPriority(in int clientId, in int priority, in int niceValue);
+
+    /*
+     * Updates the available Frontend resources information on the current device.
+     *
+     * <p><strong>Note:</strong> This update must happen before the first
+     * {@link #requestFrontend(TunerFrontendRequest,int[])} and {@link #releaseFrontend(int)} call.
+     *
+     * @param infos an array of the available {@link TunerFrontendInfo} information.
+     */
+    void setFrontendInfoList(in TunerFrontendInfo[] infos);
+
+    /*
+     * Updates the available Cas resource information on the current device.
+     *
+     * <p><strong>Note:</strong> This update must happen before the first
+     * {@link #requestCasSession(CasSessionRequest, int[])} and {@link #releaseCasSession(int)} call.
+     *
+     * @param casSystemId id of the updating CAS system.
+     * @param maxSessionNum the max session number of the CAS system that is updated.
+     */
+    void updateCasInfo(in int casSystemId, in int maxSessionNum);
+
+    /*
+     * Updates the available Lnb resource information on the current device.
+     *
+     * <p><strong>Note:</strong> This update must happen before the first
+     * {@link #requestLnb(TunerLnbRequest, int[])} and {@link #releaseLnb(int)} call.
+     *
+     * @param lnbIds ids of the updating lnbs.
+     */
+    void setLnbInfoList(in int[] lnbIds);
+
+    /*
+     * This API is used by the Tuner framework to request an available frontend from the TunerHAL.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is frontend available, the API would send the id back.
+     *
+     * <li>If no Frontend is available but the current request info can show higher priority than
+     * other uses of Frontend, the API will send
+     * {@link ITunerResourceManagerListener#onResourcesReclaim()} 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 frontend can be granted, the API would return false.
+     * <ul>
+     *
+     * <p><strong>Note:</strong> {@link #setFrontendInfoList(TunerFrontendInfo[])} must be called
+     * before this request.
+     *
+     * @param request {@link TunerFrontendRequest} information of the current request.
+     * @param frontendId a one-element array to return the granted frontendId.
+     *
+     * @return true if there is frontend granted.
+     */
+    boolean requestFrontend(in TunerFrontendRequest request, out int[] frontendId);
+
+    /*
+     * Requests to share frontend with an existing client.
+     *
+     * <p><strong>Note:</strong> {@link #setFrontendInfoList(TunerFrontendInfo[])} must be called
+     * before this request.
+     *
+     * @param selfClientId the id of the client that sends the request.
+     * @param targetClientId the id of the client to share the frontend with.
+     */
+    void shareFrontend(in int selfClientId, in int targetClientId);
+
+    /*
+     * 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}.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is Cas session available, the API would send the id back.
+     *
+     * <li>If no Cas session is available but the current request info can show higher priority than
+     * other uses of the sessions under the requested CAS system, the API will send
+     * {@link ITunerResourceManagerCallback#onResourcesReclaim()} 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 Cas session can be granted, the API would return false.
+     * <ul>
+     *
+     * <p><strong>Note:</strong> {@link #updateCasInfo(int, int)} must be called before this request.
+     *
+     * @param request {@link CasSessionRequest} information of the current request.
+     * @param sessionResourceId a one-element array to return the granted cas session id.
+     *
+     * @return true if there is CAS session granted.
+     */
+    boolean requestCasSession(in CasSessionRequest request, out int[] sessionResourceId);
+
+    /*
+     * This API is used by the Tuner framework to request an available Lnb from the TunerHAL.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is Lnb available, the API would send the id back.
+     *
+     * <li>If no Lnb is available but the current request has a higher priority than other uses of
+     * lnbs, the API will send {@link ITunerResourceManagerCallback#onResourcesReclaim()} 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 Lnb system can be granted, the API would return false.
+     * <ul>
+     *
+     * <p><strong>Note:</strong> {@link #setLnbInfos(int[])} must be called before this request.
+     *
+     * @param request {@link TunerLnbRequest} information of the current request.
+     * @param lnbId a one-element array to return the granted Lnb id.
+     *
+     * @return true if there is Lnb granted.
+     */
+    boolean requestLnb(in TunerLnbRequest request, out int[] lnbId);
+
+    /*
+     * Notifies the TRM that the given frontend has been released.
+     *
+     * <p>Client must call this whenever it releases a Tuner frontend.
+     *
+     * <p><strong>Note:</strong> {@link #setFrontendInfoList(TunerFrontendInfo[])} must be called
+     * before this release.
+     *
+     * @param frontendId the id of the released frontend.
+     */
+    void releaseFrontend(in int frontendId);
+
+    /*
+     * Notifies the TRM that the given Cas session has been released.
+     *
+     * <p>Client must call this whenever it releases a Cas session.
+     *
+     * <p><strong>Note:</strong> {@link #updateCasInfo(int, int)} must be called before this release.
+     *
+     * @param sessionResourceId the id of the released CAS session.
+     */
+    void releaseCasSession(in int sessionResourceId);
+
+    /*
+     * Notifies the TRM that the Lnb with the given id was released.
+     *
+     * <p>Client must call this whenever it releases an Lnb.
+     *
+     * <p><strong>Note:</strong> {@link #setLnbInfos(int[])} must be called before this release.
+     *
+     * @param lnbId the id of the released Tuner Lnb.
+     */
+    void releaseLnb(in int lnbId);
+
+    /*
+     * Compare two clients' priority.
+     *
+     * @param challengerProfile the {@link ResourceClientProfile} of the challenger.
+     * @param holderProfile the {@link ResourceClientProfile} of the holder of the resource.
+     *
+     * @return true if the challenger has higher priority than the holder.
+     */
+    boolean isHigherPriority(in ResourceClientProfile challengerProfile,
+            in ResourceClientProfile holderProfile);
+}
diff --git a/media/java/android/media/tv/tuner/ITunerResourceManagerListener.aidl b/media/java/android/media/tv/tuner/ITunerResourceManagerListener.aidl
new file mode 100644
index 0000000000000..557032ca8d6d7
--- /dev/null
+++ b/media/java/android/media/tv/tuner/ITunerResourceManagerListener.aidl
@@ -0,0 +1,33 @@
+/*
+ * 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.tuner;
+
+/**
+ * Interface to receive callbacks from ITunerResourceManager.
+ *
+ * @hide
+ */
+oneway interface ITunerResourceManagerListener {
+    /*
+     * TRM invokes this method when the client's resources need to be reclaimed.
+     *
+     * <p>This method is implemented in Tuner Framework to take the reclaiming
+     * actions. It's a synchonized call. TRM would wait on the call to finish
+     * then grant the resource.
+     */
+    void onResourcesReclaim();
+}
\ No newline at end of file
diff --git a/media/java/android/media/tv/tuner/ResourceClientProfile.aidl b/media/java/android/media/tv/tuner/ResourceClientProfile.aidl
new file mode 100644
index 0000000000000..da3c5c4f15f92
--- /dev/null
+++ b/media/java/android/media/tv/tuner/ResourceClientProfile.aidl
@@ -0,0 +1,25 @@
+/*
+ * 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.tuner;
+
+/**
+ * A profile of a resource client. This profile is used to register the client info
+ * with the Tuner Resource Manager.
+ *
+ * @hide
+ */
+parcelable ResourceClientProfile;
\ No newline at end of file
diff --git a/media/java/android/media/tv/tuner/ResourceClientProfile.java b/media/java/android/media/tv/tuner/ResourceClientProfile.java
new file mode 100644
index 0000000000000..e2031353b27a4
--- /dev/null
+++ b/media/java/android/media/tv/tuner/ResourceClientProfile.java
@@ -0,0 +1,129 @@
+/*
+ * 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.tuner;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+/**
+ * A profile of a resource client. This profile is used to register the client info
+ * with the Tuner Resource Manager(TRM).
+ *
+ * @hide
+ */
+public final class ResourceClientProfile implements Parcelable {
+    static final String TAG = "ResourceClientProfile";
+
+    public static final
+                @NonNull
+                Parcelable.Creator<ResourceClientProfile> CREATOR =
+                new Parcelable.Creator<ResourceClientProfile>() {
+                @Override
+                public ResourceClientProfile createFromParcel(Parcel source) {
+                    try {
+                        return new ResourceClientProfile(source);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception creating ResourceClientProfile from parcel", e);
+                        return null;
+                    }
+                }
+
+                @Override
+                public ResourceClientProfile[] newArray(int size) {
+                    return new ResourceClientProfile[size];
+                }
+            };
+
+    /**
+     * This is used by TRM to get TV App’s processId from TIF.
+     * The processId will be used to identify foreground applications.
+     *
+     * <p>MediaCas, Tuner and TvInputHardwareManager get tvInputSessionId from TIS.
+     * If mTvInputSessionId is UNKNOWN, the client is always background.
+     */
+    private final String mTvInputSessionId;
+
+    /**
+     * Usage of the client.
+     */
+    private final int mUseCase;
+
+    private ResourceClientProfile(@NonNull Parcel source) {
+        mTvInputSessionId = source.readString();
+        mUseCase = source.readInt();
+    }
+
+    /**
+     * Constructs a new {@link ResourceClientProfile} with the given parameters.
+     *
+     * @param tvInputSessionId the unique id of the session owned by the client.
+     * @param useCase the usage of the client. Suggested priority hints are
+     *                {@link android.media.tv.TvInputService.PRIORITY_HINT_USE_CASE_TYPE_PLAYBACK}
+     *                {@link android.media.tv.TvInputService.PRIORITY_HINT_USE_CASE_TYPE_LIVE}
+     *                {@link android.media.tv.TvInputService.PRIORITY_HINT_USE_CASE_TYPE_RECORD}.
+     *                New [use case : priority value] pair can be defined in the manifest by the
+     *                OEM. Any undefined use case would cause IllegalArgumentException.
+     */
+    public ResourceClientProfile(@NonNull String tvInputSessionId,
+                                 int useCase) {
+        mTvInputSessionId = tvInputSessionId;
+        mUseCase = useCase;
+    }
+
+    /**
+     * Returns the tv input session id of the client.
+     *
+     * @return the value of the tv input session id.
+     */
+    @NonNull
+    public String getTvInputSessionId() {
+        return mTvInputSessionId;
+    }
+
+    /**
+     * Returns the user usage of the client.
+     *
+     * @return the value of use case.
+     */
+    public int getUseCase() {
+        return mUseCase;
+    }
+
+    // Parcelable
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder(128);
+        b.append("ResourceClientProfile {tvInputSessionId=").append(mTvInputSessionId);
+        b.append(", useCase=").append(mUseCase);
+        b.append("}");
+        return b.toString();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeString(mTvInputSessionId);
+        dest.writeInt(mUseCase);
+    }
+}
diff --git a/media/java/android/media/tv/tuner/TunerFrontendInfo.aidl b/media/java/android/media/tv/tuner/TunerFrontendInfo.aidl
new file mode 100644
index 0000000000000..012e051d85980
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerFrontendInfo.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.tuner;
+
+/**
+ * Simple container of the FrontendInfo struct defined in the TunerHAL 1.0 interface.
+ *
+ * @hide
+ */
+parcelable TunerFrontendInfo;
\ No newline at end of file
diff --git a/media/java/android/media/tv/tuner/TunerFrontendInfo.java b/media/java/android/media/tv/tuner/TunerFrontendInfo.java
new file mode 100644
index 0000000000000..a62ecb3893ea7
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerFrontendInfo.java
@@ -0,0 +1,141 @@
+/*
+ * 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.tuner;
+
+import android.annotation.NonNull;
+import android.media.tv.tuner.frontend.FrontendSettings.Type;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+/**
+ * Simple container of the FrontendInfo struct defined in the TunerHAL 1.0 interface.
+ *
+ * <p>Note that this object is defined to pass necessary frontend info between the
+ * Tuner Resource Manager and the client. It includes partial information in
+ * {@link FrontendInfo}.
+ *
+ * @hide
+ */
+public final class TunerFrontendInfo implements Parcelable {
+    static final String TAG = "TunerFrontendInfo";
+
+    public static final
+            @NonNull
+            Parcelable.Creator<TunerFrontendInfo> CREATOR =
+            new Parcelable.Creator<TunerFrontendInfo>() {
+                @Override
+                public TunerFrontendInfo createFromParcel(Parcel source) {
+                    try {
+                        return new TunerFrontendInfo(source);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception creating TunerFrontendInfo from parcel", e);
+                        return null;
+                    }
+                }
+
+                @Override
+                public TunerFrontendInfo[] newArray(int size) {
+                    return new TunerFrontendInfo[size];
+                }
+            };
+
+    private final int mId;
+
+    @Type
+    private final int mFrontendType;
+
+    /**
+     * Frontends are assigned with the same exclusiveGroupId if they can't
+     * function at same time. For instance, they share same hardware module.
+     */
+    private final int mExclusiveGroupId;
+
+    private TunerFrontendInfo(@NonNull Parcel source) {
+        mId = source.readInt();
+        mFrontendType = source.readInt();
+        mExclusiveGroupId = source.readInt();
+    }
+
+    /**
+     * Constructs a new {@link TunerFrontendInfo} with the given parameters.
+     *
+     * @param frontendType the type of the frontend.
+     * @param exclusiveGroupId the group id of the frontend. FE with the same
+                               group id can't function at the same time.
+     */
+    public TunerFrontendInfo(int id,
+                             @Type int frontendType,
+                             int exclusiveGroupId) {
+        mId = id;
+        mFrontendType = frontendType;
+        mExclusiveGroupId = exclusiveGroupId;
+    }
+
+    /**
+     * Returns the frontend id.
+     *
+     * @return the value of the frontend id.
+     */
+    public int getId() {
+        return mId;
+    }
+
+    /**
+     * Returns the application id that requests the tuner frontend resource.
+     *
+     * @return the value of the frontend type.
+     */
+    @Type
+    public int getFrontendType() {
+        return mFrontendType;
+    }
+
+    /**
+     * Returns the exclusiveGroupId. Frontends with the same exclusiveGroupId
+     * can't function at same time.
+     *
+     * @return the value of the exclusive group id.
+     */
+    public int getExclusiveGroupId() {
+        return mExclusiveGroupId;
+    }
+
+    // Parcelable
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder(128);
+        b.append("TunerFrontendInfo {id=").append(mId);
+        b.append(", frontendType=").append(mFrontendType);
+        b.append(", exclusiveGroupId=").append(mExclusiveGroupId);
+        b.append("}");
+        return b.toString();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mId);
+        dest.writeInt(mFrontendType);
+        dest.writeInt(mExclusiveGroupId);
+    }
+}
diff --git a/media/java/android/media/tv/tuner/TunerFrontendRequest.aidl b/media/java/android/media/tv/tuner/TunerFrontendRequest.aidl
new file mode 100644
index 0000000000000..25c298f0f65b3
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerFrontendRequest.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.tuner;
+
+/**
+ * Information required to request a Tuner Frontend.
+ *
+ * @hide
+ */
+parcelable TunerFrontendRequest;
\ No newline at end of file
diff --git a/media/java/android/media/tv/tuner/TunerFrontendRequest.java b/media/java/android/media/tv/tuner/TunerFrontendRequest.java
new file mode 100644
index 0000000000000..01a0a091877fa
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerFrontendRequest.java
@@ -0,0 +1,114 @@
+/*
+ * 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.tuner;
+
+import android.annotation.NonNull;
+import android.media.tv.tuner.frontend.FrontendSettings.Type;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+/**
+ * Information required to request a Tuner Frontend.
+ *
+ * @hide
+ */
+public final class TunerFrontendRequest implements Parcelable {
+    static final String TAG = "TunerFrontendRequest";
+
+    public static final
+            @NonNull
+            Parcelable.Creator<TunerFrontendRequest> CREATOR =
+            new Parcelable.Creator<TunerFrontendRequest>() {
+                @Override
+                public TunerFrontendRequest createFromParcel(Parcel source) {
+                    try {
+                        return new TunerFrontendRequest(source);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception creating TunerFrontendRequest from parcel", e);
+                        return null;
+                    }
+                }
+
+                @Override
+                public TunerFrontendRequest[] newArray(int size) {
+                    return new TunerFrontendRequest[size];
+                }
+            };
+
+    private final int mClientId;
+    @Type
+    private final int mFrontendType;
+
+    private TunerFrontendRequest(@NonNull Parcel source) {
+        mClientId = source.readInt();
+        mFrontendType = source.readInt();
+    }
+
+    /**
+     * Constructs a new {@link TunerFrontendRequest} with the given parameters.
+     *
+     * @param clientId the unique id of the client returned when registering profile.
+     * @param frontendType the type of the requested frontend.
+     */
+    public TunerFrontendRequest(int clientId,
+                                @Type int frontendType) {
+        mClientId = clientId;
+        mFrontendType = frontendType;
+    }
+
+    /**
+     * Returns the client id that requests the tuner frontend resource.
+     *
+     * @return the value of the client id.
+     */
+    public int getClientId() {
+        return mClientId;
+    }
+
+    /**
+     * Returns the frontend type that the client requests for.
+     *
+     * @return the value of the requested frontend type.
+     */
+    @Type
+    public int getFrontendType() {
+        return mFrontendType;
+    }
+
+    // Parcelable
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder(128);
+        b.append("TunerFrontendRequest {clientId=").append(mClientId);
+        b.append(", frontendType=").append(mFrontendType);
+        b.append("}");
+        return b.toString();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mClientId);
+        dest.writeInt(mFrontendType);
+    }
+}
diff --git a/media/java/android/media/tv/tuner/TunerLnbRequest.aidl b/media/java/android/media/tv/tuner/TunerLnbRequest.aidl
new file mode 100644
index 0000000000000..b811e3922252f
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerLnbRequest.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.tuner;
+
+/**
+ * Information required to request a Tuner Lnb.
+ *
+ * @hide
+ */
+parcelable TunerLnbRequest;
\ No newline at end of file
diff --git a/media/java/android/media/tv/tuner/TunerLnbRequest.java b/media/java/android/media/tv/tuner/TunerLnbRequest.java
new file mode 100644
index 0000000000000..60cd7903b1761
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerLnbRequest.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.tuner;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+/**
+ * Information required to request a Tuner Lnb.
+ *
+ * @hide
+ */
+public final class TunerLnbRequest implements Parcelable {
+    static final String TAG = "TunerLnbRequest";
+
+    public static final
+            @NonNull
+                Parcelable.Creator<TunerLnbRequest> CREATOR =
+                new Parcelable.Creator<TunerLnbRequest>() {
+                @Override
+                public TunerLnbRequest createFromParcel(Parcel source) {
+                    try {
+                        return new TunerLnbRequest(source);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception creating TunerLnbRequest from parcel", e);
+                        return null;
+                    }
+                }
+
+                @Override
+                public TunerLnbRequest[] newArray(int size) {
+                    return new TunerLnbRequest[size];
+                }
+            };
+
+    /**
+     * Client id of the client that sends the request.
+     */
+    private final int mClientId;
+
+    private TunerLnbRequest(@NonNull Parcel source) {
+        mClientId = source.readInt();
+    }
+
+    /**
+     * Constructs a new {@link TunerLnbRequest} with the given parameters.
+     *
+     * @param clientId the id of the client.
+     */
+    public TunerLnbRequest(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("TunerLnbRequest {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/tuner/TunerResourceManager.java b/media/java/android/media/tv/tuner/TunerResourceManager.java
new file mode 100644
index 0000000000000..68ca5722ecad6
--- /dev/null
+++ b/media/java/android/media/tv/tuner/TunerResourceManager.java
@@ -0,0 +1,407 @@
+/*
+ * 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.tuner;
+
+import android.annotation.CallbackExecutor;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresFeature;
+import android.annotation.SystemService;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Binder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import java.util.concurrent.Executor;
+
+/**
+ * Interface of the Tuner Resource Manager(TRM). It manages resources used by TV Tuners.
+ * <p>Resources include:
+ * <ul>
+ * <li>TunerFrontend {@link android.media.tv.tuner.frontend}.
+ * <li>TunerLnb {@link android.media.tv.tuner.Lnb}.
+ * <li>MediaCas {@link android.media.MediaCas}.
+ * <ul>
+ *
+ * <p>Expected workflow is:
+ * <ul>
+ * <li>Tuner Java/MediaCas/TIF update resources of the current device with TRM.
+ * <li>Client registers its profile through {@link #registerClientProfile(ResourceClientProfile,
+ * Executor, ResourceListener, int[])}.
+ * <li>Client requests resources through request APIs.
+ * <li>If the resource needs to be handed to a higher priority client from a lower priority
+ * one, TRM calls ITunerResourceManagerListener registered by the lower priority client to release
+ * the resource.
+ * <ul>
+ *
+ * <p>TRM also exposes its priority comparison algorithm as a helping method to other services.
+ * {@see #isHigherPriority(ResourceClientProfile, ResourceClientProfile)}.
+ *
+ * @hide
+ */
+@RequiresFeature(PackageManager.FEATURE_LIVE_TV)
+@SystemService(Context.TV_TUNER_RESOURCE_MGR_SERVICE)
+public class TunerResourceManager {
+    private static final String TAG = "TunerResourceManager";
+    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
+
+    public static final int INVALID_FRONTEND_ID = -1;
+    public static final int INVALID_CAS_SESSION_RESOURCE_ID = -1;
+    public static final int INVALID_LNB_ID = -1;
+    public static final int INVALID_TV_INPUT_DEVICE_ID = -1;
+    public static final int INVALID_TV_INPUT_PORT_ID = -1;
+
+    private final ITunerResourceManager mService;
+    private final int mUserId;
+
+    /**
+     * @hide
+     */
+    public TunerResourceManager(ITunerResourceManager service, int userId) {
+        mService = service;
+        mUserId = userId;
+    }
+
+    /**
+     * This API is used by the client to register their profile with the Tuner Resource manager.
+     *
+     * <p>The profile contains information that can show the base priority score of the client.
+     *
+     * @param profile {@link ResourceClientProfile} profile of the current client. Undefined use
+     *                case would cause IllegalArgumentException.
+     * @param executor the executor on which the listener would be invoked.
+     * @param listener {@link ResourceListener} callback to reclaim clients' resources when needed.
+     * @param clientId returned a clientId from the resource manager when the
+     *                 the client registeres.
+     * @throws IllegalArgumentException when {@code profile} contains undefined use case.
+     */
+    public void registerClientProfile(@NonNull ResourceClientProfile profile,
+                        @NonNull @CallbackExecutor Executor executor,
+                        @NonNull ResourceListener listener,
+                        @NonNull int[] clientId) {
+        // TODO: throw new IllegalArgumentException("Unknown client use case")
+        // when the use case is not defined.
+        try {
+            mService.registerClientProfile(profile,
+                    new ITunerResourceManagerListener.Stub() {
+                    @Override
+                public void onResourcesReclaim() {
+                        final long identity = Binder.clearCallingIdentity();
+                        try {
+                            executor.execute(() -> listener.onResourcesReclaim());
+                        } finally {
+                            Binder.restoreCallingIdentity(identity);
+                        }
+                    }
+                }, clientId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * This API is used by the client to unregister their profile with the
+     * Tuner Resource manager.
+     *
+     * @param clientId the client id that needs to be unregistered.
+     */
+    public void unregisterClientProfile(int clientId) {
+        try {
+            mService.unregisterClientProfile(clientId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * This API is used by client to update its registered {@link ResourceClientProfile}.
+     *
+     * <p>We recommend creating a new tuner instance for different use cases instead of using this
+     * API since different use cases may need different resources.
+     *
+     * <p>If TIS updates use case, it needs to ensure underneath resources are exchangeable between
+     * two different use cases.
+     *
+     * <p>Only the arbitrary priority and niceValue are allowed to be updated.
+     *
+     * @param clientId the id of the client that is updating its profile.
+     * @param priority the priority that the client would like to update to.
+     * @param niceValue the nice value that the client would like to update to.
+     *
+     * @return true if the update is successful.
+     */
+    public boolean updateClientPriority(int clientId, int priority, int niceValue) {
+        boolean result = false;
+        try {
+            result = mService.updateClientPriority(clientId, priority, niceValue);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return result;
+    }
+
+    /**
+     * Updates the current TRM of the TunerHAL Frontend information.
+     *
+     * <p><strong>Note:</strong> This update must happen before the first
+     * {@link #requestFrontend(TunerFrontendRequest, int[])} and {@link #releaseFrontend(int)} call.
+     *
+     * @param infos an array of the available {@link TunerFrontendInfo} information.
+     */
+    public void setFrontendInfoList(@NonNull TunerFrontendInfo[] infos) {
+        try {
+            mService.setFrontendInfoList(infos);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Updates the TRM of the current CAS information.
+     *
+     * <p><strong>Note:</strong> This update must happen before the first
+     * {@link #requestCasSession(CasSessionRequest, int[])} and {@link #releaseCasSession(int)}
+     * call.
+     *
+     * @param casSystemId id of the updating CAS system.
+     * @param maxSessionNum the max session number of the CAS system that is updated.
+     */
+    public void updateCasInfo(int casSystemId, int maxSessionNum) {
+        try {
+            mService.updateCasInfo(casSystemId, maxSessionNum);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Updates the TRM of the current Lnb information.
+     *
+     * <p><strong>Note:</strong> This update must happen before the first
+     * {@link #requestLnb(TunerLnbRequest, int[])} and {@link #releaseLnb(int)} call.
+     *
+     * @param lnbIds ids of the updating lnbs.
+     */
+    public void setLnbInfoList(int[] lnbIds) {
+        try {
+            mService.setLnbInfoList(lnbIds);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Requests a frontend resource.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is frontend available, the API would send the id back.
+     *
+     * <li>If no Frontend is available but the current request info can show higher priority than
+     * other uses of Frontend, the API will send
+     * {@link ITunerResourceManagerListener#onResourcesReclaim()} 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 frontend can be granted, the API would return false.
+     * <ul>
+     *
+     * <p><strong>Note:</strong> {@link #setFrontendInfoList(TunerFrontendInfo[])} must be called
+     * before this request.
+     *
+     * @param request {@link TunerFrontendRequest} information of the current request.
+     * @param frontendId a one-element array to return the granted frontendId. If
+     *                   no frontend granted, this will return {@link #INVALID_FRONTEND_ID}.
+     *
+     * @return true if there is frontend granted.
+     */
+    public boolean requestFrontend(@NonNull TunerFrontendRequest request,
+                @Nullable int[] frontendId) {
+        boolean result = false;
+        try {
+            result = mService.requestFrontend(request, frontendId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return result;
+    }
+
+    /**
+     * Requests from the client to share frontend with an existing client.
+     *
+     * <p><strong>Note:</strong> {@link #setFrontendInfoList(TunerFrontendInfo[])} must be called
+     * before this request.
+     *
+     * @param selfClientId the id of the client that sends the request.
+     * @param targetClientId the id of the client to share the frontend with.
+     */
+    public void shareFrontend(int selfClientId, int targetClientId) {
+        try {
+            mService.shareFrontend(selfClientId, targetClientId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Requests a CAS session resource.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is Cas session available, the API would send the id back.
+     *
+     * <li>If no Cas system is available but the current request info can show higher priority than
+     * other uses of the cas sessions under the requested cas system, the API will send
+     * {@link ITunerResourceManagerListener#onResourcesReclaim()} to the {@link Tuner}. Tuner would
+     * handle the resource reclaim on the holder of lower priority and notify the holder of its
+     * resource loss.
+     *
+     * <p><strong>Note:</strong> {@link #updateCasInfo(int, int)} must be called before this
+     * request.
+     *
+     * @param request {@link CasSessionRequest} information of the current request.
+     * @param sessionResourceId a one-element array to return the granted cas session id.
+     *                          If no CAS granted, this will return
+     *                          {@link #INVALID_CAS_SESSION_RESOURCE_ID}.
+     *
+     * @return true if there is CAS session granted.
+     */
+    public boolean requestCasSession(@NonNull CasSessionRequest request,
+                @NonNull int[] sessionResourceId) {
+        boolean result = false;
+        try {
+            result = mService.requestCasSession(request, sessionResourceId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return result;
+    }
+
+    /**
+     * Requests a Tuner Lnb resource.
+     *
+     * <p>There are three possible scenarios:
+     * <ul>
+     * <li>If there is Lnb available, the API would send the id back.
+     *
+     * <li>If no Lnb is available but the current request has a higher priority than other uses of
+     * lnbs, the API will send {@link ITunerResourceManagerListener#onResourcesReclaim()} 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 Lnb system can be granted, the API would return false.
+     * <ul>
+     *
+     * <p><strong>Note:</strong> {@link #setLnbInfos(int[])} must be called before this request.
+     *
+     * @param request {@link TunerLnbRequest} information of the current request.
+     * @param lnbId a one-element array to return the granted Lnb id.
+     *              If no Lnb granted, this will return {@link #INVALID_LNB_ID}.
+     *
+     * @return true if there is Lnb granted.
+     */
+    public boolean requestLnb(@NonNull TunerLnbRequest request, @NonNull int[] lnbId) {
+        boolean result = false;
+        try {
+            result = mService.requestLnb(request, lnbId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return result;
+    }
+
+    /**
+     * Notifies the TRM that the given frontend has been released.
+     *
+     * <p>Client must call this whenever it releases a Tuner frontend.
+     *
+     * <p><strong>Note:</strong> {@link #setFrontendInfoList(TunerFrontendInfo[])} must be called
+     * before this release.
+     *
+     * @param frontendId the id of the released frontend.
+     */
+    public void releaseFrontend(int frontendId) {
+        try {
+            mService.releaseFrontend(frontendId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Notifies the TRM that the given Cas session has been released.
+     *
+     * <p>Client must call this whenever it releases a Cas session.
+     *
+     * <p><strong>Note:</strong> {@link #updateCasInfo(int, int)} must be called before this
+     * release.
+     *
+     * @param sessionResourceId the id of the released CAS session.
+     */
+    public void releaseCasSession(int sessionResourceId) {
+        try {
+            mService.releaseCasSession(sessionResourceId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Notifies the TRM that the Lnb with the given id has been released.
+     *
+     * <p>Client must call this whenever it releases an Lnb.
+     *
+     * <p><strong>Note:</strong> {@link #setLnbInfos(int[])} must be called before this release.
+     *
+     * @param lnbId the id of the released Tuner Lnb.
+     */
+    public void releaseLnb(int lnbId) {
+        try {
+            mService.releaseLnb(lnbId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Compare two clients' priority.
+     *
+     * @param challengerProfile the {@link ResourceClientProfile} of the challenger.
+     * @param holderProfile the {@link ResourceClientProfile} of the holder of the resource.
+     *
+     * @return true if the challenger has higher priority than the holder.
+     */
+    public boolean isHigherPriority(ResourceClientProfile challengerProfile,
+            ResourceClientProfile holderProfile) {
+        try {
+            return mService.isHigherPriority(challengerProfile, holderProfile);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Interface used to receive events from TunerResourceManager.
+     */
+    public abstract static class ResourceListener {
+        /*
+         * To reclaim all the resources of the callack owner.
+         */
+        public abstract void onResourcesReclaim();
+    }
+}
diff --git a/services/core/java/com/android/server/tv/tuner/ClientProfile.java b/services/core/java/com/android/server/tv/tuner/ClientProfile.java
new file mode 100644
index 0000000000000..3845195e6643b
--- /dev/null
+++ b/services/core/java/com/android/server/tv/tuner/ClientProfile.java
@@ -0,0 +1,209 @@
+/*
+ * 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 com.android.server.tv.tuner;
+
+/**
+  * A client profile object used by the Tuner Resource Manager to record the registered clients'
+  * information.
+  *
+  * @hide
+  */
+public final class ClientProfile {
+    public static final int INVALID_GROUP_ID = -1;
+    /**
+     * Client id sent to the client when registering with
+     * {@link #registerClientProfile(ResourceClientProfile, TunerResourceManagerCallback, int[])}
+     */
+    private final int mClientId;
+
+    /**
+     * see {@link ResourceClientProfile}
+     */
+    private final String mTvInputSessionId;
+
+    /**
+     * see {@link ResourceClientProfile}
+     */
+    private final int mUseCase;
+
+    /**
+     * Process id queried from {@link TvInputManager#}
+     */
+    private final int mProcessId;
+
+    /**
+     * All the clients that share the same resource would be under the same group id.
+     *
+     * <p>If a client's resource is to be reclaimed, all other clients under the same group id
+     * also lose their resources.
+     */
+    private int mGroupId = INVALID_GROUP_ID;
+
+    /**
+     * Optional nice value for TRM to reduce client’s priority.
+     */
+    private int mNiceValue;
+
+    /**
+     * Optional arbitrary priority value given by the client.
+     *
+     * <p>This value can override the default priorotiy calculated from
+     * the client profile.
+     */
+    private int mPriority;
+
+    private ClientProfile(ClientProfileBuilder builder) {
+        this.mClientId = builder.mClientId;
+        this.mTvInputSessionId = builder.mTvInputSessionId;
+        this.mUseCase = builder.mUseCase;
+        this.mProcessId = builder.mProcessId;
+        this.mGroupId = builder.mGroupId;
+        this.mNiceValue = builder.mNiceValue;
+        this.mPriority = builder.mPriority;
+    }
+
+    public int getClientId() {
+        return mClientId;
+    }
+
+    public String getTvInputSessionId() {
+        return mTvInputSessionId;
+    }
+
+    public int getUseCase() {
+        return mUseCase;
+    }
+
+    public int getProcessId() {
+        return mProcessId;
+    }
+
+    public int getGroupId() {
+        return mGroupId;
+    }
+
+    public int getPriority() {
+        return mPriority;
+    }
+
+    public int getNiceValue() {
+        return mNiceValue;
+    }
+
+    public void setGroupId(int groupId) {
+        mGroupId = groupId;
+    }
+
+    public void setPriority(int priority) {
+        mPriority = priority;
+    }
+
+    public void setNiceValue(int niceValue) {
+        mNiceValue = niceValue;
+    }
+
+    @Override
+    public String toString() {
+        return "ClientProfile: " + this.mClientId + ", " + this.mTvInputSessionId + ", "
+                + this.mUseCase + ", " + this.mProcessId;
+    }
+
+    public static class ClientProfileBuilder {
+        private final int mClientId;
+        private String mTvInputSessionId;
+        private int mUseCase;
+        private int mProcessId;
+        private int mGroupId;
+        private int mNiceValue;
+        private int mPriority;
+
+        ClientProfileBuilder(int clientId) {
+            this.mClientId = clientId;
+        }
+
+        /**
+          * Builder for {@link ClientProfile}.
+          *
+          * @param useCase the useCase of the client.
+          */
+        public ClientProfileBuilder useCase(int useCase) {
+            this.mUseCase = useCase;
+            return this;
+        }
+
+        /**
+          * Builder for {@link ClientProfile}.
+          *
+          * @param tvInputSessionId the id of the tv input session.
+          */
+        public ClientProfileBuilder tvInputSessionId(String tvInputSessionId) {
+            this.mTvInputSessionId = tvInputSessionId;
+            return this;
+        }
+
+        /**
+          * Builder for {@link ClientProfile}.
+          *
+          * @param processId the id of process.
+          */
+        public ClientProfileBuilder processId(int processId) {
+            this.mProcessId = processId;
+            return this;
+        }
+
+
+        /**
+          * Builder for {@link ClientProfile}.
+          *
+          * @param groupId the id of the group that shares the same resource.
+          */
+        public ClientProfileBuilder groupId(int groupId) {
+            this.mGroupId = groupId;
+            return this;
+        }
+
+        /**
+          * Builder for {@link ClientProfile}.
+          *
+          * @param niceValue the nice value of the client.
+          */
+        public ClientProfileBuilder niceValue(int niceValue) {
+            this.mNiceValue = niceValue;
+            return this;
+        }
+
+        /**
+          * Builder for {@link ClientProfile}.
+          *
+          * @param priority the priority value of the client.
+          */
+        public ClientProfileBuilder priority(int priority) {
+            this.mPriority = priority;
+            return this;
+        }
+
+        /**
+          * Build a {@link ClientProfile}.
+          *
+          * @return {@link ClientProfile}.
+          */
+        public ClientProfile build() {
+            ClientProfile clientProfile = new ClientProfile(this);
+            return clientProfile;
+        }
+    }
+}
diff --git a/services/core/java/com/android/server/tv/tuner/TunerResourceManagerService.java b/services/core/java/com/android/server/tv/tuner/TunerResourceManagerService.java
new file mode 100644
index 0000000000000..e8764214ca210
--- /dev/null
+++ b/services/core/java/com/android/server/tv/tuner/TunerResourceManagerService.java
@@ -0,0 +1,258 @@
+/*
+ * 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 com.android.server.tv.tuner;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.media.tv.TvInputManager;
+import android.media.tv.tuner.CasSessionRequest;
+import android.media.tv.tuner.ITunerResourceManager;
+import android.media.tv.tuner.ITunerResourceManagerListener;
+import android.media.tv.tuner.ResourceClientProfile;
+import android.media.tv.tuner.TunerFrontendInfo;
+import android.media.tv.tuner.TunerFrontendRequest;
+import android.media.tv.tuner.TunerLnbRequest;
+import android.media.tv.tuner.TunerResourceManager;
+import android.os.RemoteException;
+import android.util.Log;
+import android.util.Slog;
+import android.util.SparseArray;
+
+import com.android.server.SystemService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+  * This class provides a system service that manages the TV tuner resources.
+  *
+  * @hide
+  */
+public class TunerResourceManagerService extends SystemService {
+    private static final String TAG = "TunerResourceManagerService";
+    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
+
+    private SparseArray<ClientProfile> mClientProfiles = new SparseArray<>();
+    private SparseArray<ITunerResourceManagerListener> mListeners = new SparseArray<>();
+    private int mNextUnusedFrontendId = 0;
+    private List<Integer> mReleasedClientId = new ArrayList<Integer>();
+    private List<Integer> mAvailableFrontendIds = new ArrayList<Integer>();
+
+    private TvInputManager mManager;
+
+    public TunerResourceManagerService(@Nullable Context context) {
+        super(context);
+    }
+
+    @Override
+    public void onStart() {
+        publishBinderService(Context.TV_TUNER_RESOURCE_MGR_SERVICE, new BinderService());
+        mManager = (TvInputManager) getContext()
+                .getSystemService(Context.TV_INPUT_SERVICE);
+    }
+
+    private final class BinderService extends ITunerResourceManager.Stub {
+        @Override
+        public void registerClientProfile(@NonNull ResourceClientProfile profile,
+                            @NonNull ITunerResourceManagerListener listener,
+                            @NonNull int[] clientId) {
+            if (DEBUG) {
+                Slog.d(TAG, "registerClientProfile(clientProfile=" + profile + ")");
+            }
+
+            // TODO tell if the client already exists
+            if (mReleasedClientId.isEmpty()) {
+                clientId[0] = mNextUnusedFrontendId++;
+            } else {
+                clientId[0] = mReleasedClientId.get(0);
+                mReleasedClientId.remove(0);
+            }
+
+            if (mManager == null) {
+                Slog.e(TAG, "TvInputManager is null. Can't register client profile.");
+                return;
+            }
+
+            int callingPid = mManager.getClientPid(profile.getTvInputSessionId());
+
+            ClientProfile clientProfile = new ClientProfile.ClientProfileBuilder(
+                    clientId[0])
+                    .tvInputSessionId(profile.getTvInputSessionId())
+                    .useCase(profile.getUseCase())
+                    .processId(callingPid)
+                    .build();
+            mClientProfiles.append(clientId[0], clientProfile);
+            mListeners.append(clientId[0], listener);
+        }
+
+        @Override
+        public void unregisterClientProfile(int clientId) {
+            if (DEBUG) {
+                Slog.d(TAG, "unregisterClientProfile(clientId=" + clientId + ")");
+            }
+
+            mClientProfiles.remove(clientId);
+            mListeners.remove(clientId);
+            mReleasedClientId.add(clientId);
+        }
+
+        @Override
+        public boolean updateClientPriority(int clientId, int priority, int niceValue) {
+            if (DEBUG) {
+                Slog.d(TAG, "updateClientPriority(clientId=" + clientId
+                        + ", priority=" + priority + ", niceValue=" + niceValue + ")");
+            }
+
+            ClientProfile profile = mClientProfiles.get(clientId);
+            if (profile == null) {
+                Slog.e(TAG, "Can not find client profile with id " + clientId
+                        + " when trying to update the client priority.");
+                return false;
+            }
+
+            profile.setPriority(priority);
+            profile.setNiceValue(niceValue);
+
+            return true;
+        }
+
+        @Override
+        public void setFrontendInfoList(@NonNull TunerFrontendInfo[] infos)
+                throws RemoteException {
+            if (infos == null || infos.length == 0) {
+                Slog.d(TAG, "Can't update with empty frontend info");
+                return;
+            }
+
+            if (DEBUG) {
+                Slog.d(TAG, "updateFrontendInfo:");
+                for (int i = 0; i < infos.length; i++) {
+                    Slog.d(TAG, infos[i].toString());
+                }
+            }
+        }
+
+        @Override
+        public void updateCasInfo(int casSystemId, int maxSessionNum) {
+            if (DEBUG) {
+                Slog.d(TAG, "updateCasInfo(casSystemId="
+                        + casSystemId + ", maxSessionNum=" + maxSessionNum + ")");
+            }
+        }
+
+        @Override
+        public void setLnbInfoList(int[] lnbIds) {
+            if (DEBUG) {
+                for (int i = 0; i < lnbIds.length; i++) {
+                    Slog.d(TAG, "updateLnbInfo(lnbId=" + lnbIds[i] + ")");
+                }
+            }
+        }
+
+        @Override
+        public boolean requestFrontend(@NonNull TunerFrontendRequest request,
+                                       @NonNull int[] frontendId) throws RemoteException {
+            if (DEBUG) {
+                Slog.d(TAG, "requestFrontend(request=" + request + ")");
+            }
+
+            frontendId[0] = TunerResourceManager.INVALID_FRONTEND_ID;
+
+            if (getContext() == null) {
+                Slog.e(TAG, "Can not find context when requesting frontend");
+                return false;
+            }
+
+            if (mClientProfiles.get(request.getClientId()) == null) {
+                Slog.e(TAG, "Request from unregistered client. Id: "
+                        + request.getClientId());
+                return false;
+            }
+
+            String sessionId = mClientProfiles.get(request.getClientId())
+                    .getTvInputSessionId();
+
+            if (DEBUG) {
+                Slog.d(TAG, "session Id:" + sessionId + ")");
+            }
+
+            if (DEBUG) {
+                Slog.d(TAG, "No available Frontend found.");
+            }
+
+            return false;
+        }
+
+        @Override
+        public void shareFrontend(int selfClientId, int targetClientId) {
+            if (DEBUG) {
+                Slog.d(TAG, "shareFrontend from "
+                        + selfClientId + " with " + targetClientId);
+            }
+        }
+
+        @Override
+        public boolean requestCasSession(@NonNull CasSessionRequest request,
+                    @NonNull int[] sessionResourceId) {
+            if (DEBUG) {
+                Slog.d(TAG, "requestCasSession(request=" + request + ")");
+            }
+
+            return true;
+        }
+
+        @Override
+        public boolean requestLnb(@NonNull TunerLnbRequest request, @NonNull int[] lnbId) {
+            if (DEBUG) {
+                Slog.d(TAG, "requestLnb(request=" + request + ")");
+            }
+            return true;
+        }
+
+        @Override
+        public void releaseFrontend(int frontendId) {
+            if (DEBUG) {
+                Slog.d(TAG, "releaseFrontend(id=" + frontendId + ")");
+            }
+        }
+
+        @Override
+        public void releaseCasSession(int sessionResourceId) {
+            if (DEBUG) {
+                Slog.d(TAG, "releaseCasSession(sessionResourceId=" + sessionResourceId + ")");
+            }
+        }
+
+        @Override
+        public void releaseLnb(int lnbId) {
+            if (DEBUG) {
+                Slog.d(TAG, "releaseLnb(lnbId=" + lnbId + ")");
+            }
+        }
+
+        @Override
+        public boolean isHigherPriority(ResourceClientProfile challengerProfile,
+                ResourceClientProfile holderProfile) {
+            if (DEBUG) {
+                Slog.d(TAG, "isHigherPriority(challengerProfile=" + challengerProfile
+                        + ", holderProfile=" + challengerProfile + ")");
+            }
+            return true;
+        }
+    }
+}
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index eef6c63d29c99..93662c91af90f 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -162,6 +162,7 @@ import com.android.server.textservices.TextServicesManagerService;
 import com.android.server.trust.TrustManagerService;
 import com.android.server.tv.TvInputManagerService;
 import com.android.server.tv.TvRemoteService;
+import com.android.server.tv.tuner.TunerResourceManagerService;
 import com.android.server.twilight.TwilightService;
 import com.android.server.uri.UriGrantsManagerService;
 import com.android.server.usage.UsageStatsService;
@@ -1854,6 +1855,8 @@ public final class SystemServer {
                     || mPackageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
                 t.traceBegin("StartTvInputManager");
                 mSystemServiceManager.startService(TvInputManagerService.class);
+                t.traceBegin("StartTunerResourceManager");
+                mSystemServiceManager.startService(TunerResourceManagerService.class);
                 t.traceEnd();
             }