diff --git a/camera/metadata/3.8/types.hal b/camera/metadata/3.8/types.hal
index b20af18..11360da 100644
--- a/camera/metadata/3.8/types.hal
+++ b/camera/metadata/3.8/types.hal
@@ -47,7 +47,7 @@
     /** android.flash.info.strengthDefaultLevel [static, int32, public]
      *
      * <p>Default flashlight brightness level to be set via
-     * {android.hardware.camera2.CameraManager#setTorchStrengthLevel}.</p>
+     * {android.hardware.camera2.CameraManager#turnOnTorchWithStrengthLevel}.</p>
      */
     ANDROID_FLASH_INFO_STRENGTH_DEFAULT_LEVEL,
 
diff --git a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/HostEndpointInfo.aidl b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/HostEndpointInfo.aidl
new file mode 100644
index 0000000..7da4482
--- /dev/null
+++ b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/HostEndpointInfo.aidl
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.contexthub;
+@VintfStability
+parcelable HostEndpointInfo {
+  char hostEndpointId;
+  android.hardware.contexthub.HostEndpointInfo.Type type;
+  @nullable String[] packageName;
+  @nullable String[] attributionTag;
+  @Backing(type="int") @VintfStability
+  enum Type {
+    TYPE_FRAMEWORK = 1,
+    TYPE_APP = 2,
+  }
+}
diff --git a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
index cb31c84..facce4b 100644
--- a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
+++ b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
@@ -43,4 +43,6 @@
   boolean queryNanoapps(in int contextHubId);
   boolean registerCallback(in int contextHubId, in android.hardware.contexthub.IContextHubCallback cb);
   boolean sendMessageToHub(in int contextHubId, in android.hardware.contexthub.ContextHubMessage message);
+  void onHostEndpointConnected(in android.hardware.contexthub.HostEndpointInfo hostEndpointInfo);
+  void onHostEndpointDisconnected(char hostEndpointId);
 }
diff --git a/contexthub/aidl/android/hardware/contexthub/HostEndpointInfo.aidl b/contexthub/aidl/android/hardware/contexthub/HostEndpointInfo.aidl
new file mode 100644
index 0000000..370703f
--- /dev/null
+++ b/contexthub/aidl/android/hardware/contexthub/HostEndpointInfo.aidl
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2021 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.hardware.contexthub;
+
+/**
+ * Stores metadata regarding a host endpoint that may communicate with the Context Hub.
+ */
+@VintfStability
+parcelable HostEndpointInfo {
+    /** The ID of the host endpoint asscociated with this host. */
+    char hostEndpointId;
+
+    /** The type of endpoint. */
+    Type type;
+
+    /** The (optional) package name of the host. */
+    @nullable String[] packageName;
+
+    /** The (optional) attribution tag associated with this host. */
+    @nullable String[] attributionTag;
+
+    @VintfStability
+    @Backing(type="int")
+    enum Type {
+        /**
+           This endpoint is from the Android framework, where packageName and attributionTag may be
+           empty.
+         */
+        TYPE_FRAMEWORK = 1,
+
+        /** This endpoint is an Android app. */
+        TYPE_APP = 2,
+    }
+}
diff --git a/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl b/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
index e820cbf..33d241a 100644
--- a/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
+++ b/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
@@ -18,6 +18,7 @@
 
 import android.hardware.contexthub.ContextHubInfo;
 import android.hardware.contexthub.ContextHubMessage;
+import android.hardware.contexthub.HostEndpointInfo;
 import android.hardware.contexthub.IContextHubCallback;
 import android.hardware.contexthub.NanoappBinary;
 import android.hardware.contexthub.Setting;
@@ -151,4 +152,29 @@
      * @return true on success
      */
     boolean sendMessageToHub(in int contextHubId, in ContextHubMessage message);
+
+    /**
+     * Invoked when a host endpoint has connected with the ContextHubService.
+     *
+     * The host associated with this invocation may initiate a communication channel with
+     * the Context Hub using sendMessageToHub.
+     *
+     * @param hostEndpointInfo Metadata associated with this host endpoint.
+     */
+    void onHostEndpointConnected(in HostEndpointInfo hostEndpointInfo);
+
+    /**
+     * Invoked when a host endpoint has disconnected from the framework. This could be as a result
+     * of an explicit connection closure, or unexpected restarts.
+     *
+     * Note that hostEndpointId is the same as the value in HostEndpointInfo. When this function is
+     * called, the HAL is expected to clean up any resources attached to the messaging channel
+     * associated with this host endpoint ID.
+     *
+     * @param hostEndPointId The ID of the host that has disconnected.
+     *
+     * @return Status::ok on success
+     *         EX_ILLEGAL_ARGUMENT if hostEndpointId is not associated with a connected host.
+     */
+    void onHostEndpointDisconnected(char hostEndpointId);
 }
diff --git a/contexthub/aidl/default/ContextHub.cpp b/contexthub/aidl/default/ContextHub.cpp
index 1fbccc5..6da690d 100644
--- a/contexthub/aidl/default/ContextHub.cpp
+++ b/contexthub/aidl/default/ContextHub.cpp
@@ -111,6 +111,21 @@
     return ndk::ScopedAStatus::ok();
 }
 
+::ndk::ScopedAStatus ContextHub::onHostEndpointConnected(const HostEndpointInfo& in_info) {
+    mConnectedHostEndpoints.insert(in_info.hostEndpointId);
+
+    return ndk::ScopedAStatus::ok();
+}
+
+::ndk::ScopedAStatus ContextHub::onHostEndpointDisconnected(char16_t in_hostEndpointId) {
+    if (mConnectedHostEndpoints.count(in_hostEndpointId) > 0) {
+        mConnectedHostEndpoints.erase(in_hostEndpointId);
+        return ndk::ScopedAStatus::ok();
+    } else {
+        return ndk::ScopedAStatus(AStatus_fromExceptionCode(EX_ILLEGAL_ARGUMENT));
+    }
+}
+
 }  // namespace contexthub
 }  // namespace hardware
 }  // namespace android
diff --git a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
index 0dbb61b..dd739e6 100644
--- a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
+++ b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
@@ -18,6 +18,8 @@
 
 #include <aidl/android/hardware/contexthub/BnContextHub.h>
 
+#include <unordered_set>
+
 namespace aidl {
 namespace android {
 namespace hardware {
@@ -41,10 +43,15 @@
     ::ndk::ScopedAStatus sendMessageToHub(int32_t in_contextHubId,
                                           const ContextHubMessage& in_message,
                                           bool* _aidl_return) override;
+    ::ndk::ScopedAStatus onHostEndpointConnected(const HostEndpointInfo& in_info) override;
+
+    ::ndk::ScopedAStatus onHostEndpointDisconnected(char16_t in_hostEndpointId) override;
 
   private:
     static constexpr uint32_t kMockHubId = 0;
     std::shared_ptr<IContextHubCallback> mCallback;
+
+    std::unordered_set<char16_t> mConnectedHostEndpoints;
 };
 
 }  // namespace contexthub
diff --git a/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp b/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
index 4b0d60f..1b2dc29 100644
--- a/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
+++ b/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
@@ -36,6 +36,7 @@
 using ::android::hardware::contexthub::AsyncEventType;
 using ::android::hardware::contexthub::ContextHubInfo;
 using ::android::hardware::contexthub::ContextHubMessage;
+using ::android::hardware::contexthub::HostEndpointInfo;
 using ::android::hardware::contexthub::IContextHub;
 using ::android::hardware::contexthub::IContextHubCallbackDefault;
 using ::android::hardware::contexthub::NanoappBinary;
@@ -330,6 +331,22 @@
     return tuples;
 }
 
+TEST_P(ContextHubAidl, TestHostConnection) {
+    constexpr char16_t kHostEndpointId = 1;
+    HostEndpointInfo hostEndpointInfo;
+    hostEndpointInfo.hostEndpointId = kHostEndpointId;
+
+    ASSERT_TRUE(contextHub->onHostEndpointConnected(hostEndpointInfo).isOk());
+    ASSERT_TRUE(contextHub->onHostEndpointDisconnected(kHostEndpointId).isOk());
+}
+
+TEST_P(ContextHubAidl, TestInvalidHostConnection) {
+    constexpr char16_t kHostEndpointId = 1;
+
+    Status status = contextHub->onHostEndpointDisconnected(kHostEndpointId);
+    ASSERT_EQ(status.exceptionCode(), android::binder::Status::EX_ILLEGAL_ARGUMENT);
+}
+
 std::string PrintGeneratedTest(const testing::TestParamInfo<ContextHubAidl::ParamType>& info) {
     return std::string("CONTEXT_HUB_ID_") + std::to_string(std::get<1>(info.param));
 }
diff --git a/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp b/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp
index ba7bccc..2d23b08 100644
--- a/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp
+++ b/graphics/composer/aidl/android/hardware/graphics/composer3/vts/functional/VtsHalGraphicsComposer3_TargetTest.cpp
@@ -613,6 +613,15 @@
     Test_setActiveConfigWithConstraints({.delayForChange = 0, .refreshMiss = false});
 }
 
+TEST_P(GraphicsComposerAidlTest, setActiveConfigWithConstraints_Delayed) {
+    Test_setActiveConfigWithConstraints({.delayForChange = 300'000'000,  // 300ms
+                                         .refreshMiss = false});
+}
+
+TEST_P(GraphicsComposerAidlTest, setActiveConfigWithConstraints_MissRefresh) {
+    Test_setActiveConfigWithConstraints({.delayForChange = 0, .refreshMiss = true});
+}
+
 TEST_P(GraphicsComposerAidlTest, GetDisplayIdentificationData) {
     DisplayIdentification displayIdentification0;
 
diff --git a/tv/tuner/aidl/vts/functional/FilterTests.cpp b/tv/tuner/aidl/vts/functional/FilterTests.cpp
index c53adb2..a5acdc1 100644
--- a/tv/tuner/aidl/vts/functional/FilterTests.cpp
+++ b/tv/tuner/aidl/vts/functional/FilterTests.cpp
@@ -23,6 +23,33 @@
 
 using ::aidl::android::hardware::common::NativeHandle;
 
+::ndk::ScopedAStatus FilterCallback::onFilterEvent(const vector<DemuxFilterEvent>& events) {
+    android::Mutex::Autolock autoLock(mMsgLock);
+    // Temprarily we treat the first coming back filter data on the matching pid a success
+    // once all of the MQ are cleared, means we got all the expected output
+    readFilterEventsData(events);
+    mPidFilterOutputCount++;
+    mMsgCondition.signal();
+
+    // HACK: we need to cast the const away as DemuxFilterEvent contains a ScopedFileDescriptor
+    // that cannot be copied.
+    for (auto&& e : const_cast<std::vector<DemuxFilterEvent>&>(events)) {
+        auto it = mFilterEventPromises.find(e.getTag());
+        if (it != mFilterEventPromises.cend()) {
+            it->second.set_value(std::move(e));
+            mFilterEventPromises.erase(it);
+        }
+    }
+
+    return ::ndk::ScopedAStatus::ok();
+}
+
+std::future<DemuxFilterEvent> FilterCallback::getNextFilterEventWithTag(DemuxFilterEvent::Tag tag) {
+    // Note: this currently only supports one future per DemuxFilterEvent::Tag.
+    mFilterEventPromises[tag] = std::promise<DemuxFilterEvent>();
+    return mFilterEventPromises[tag].get_future();
+}
+
 void FilterCallback::testFilterDataOutput() {
     android::Mutex::Autolock autoLock(mMsgLock);
     while (mPidFilterOutputCount < 1) {
diff --git a/tv/tuner/aidl/vts/functional/FilterTests.h b/tv/tuner/aidl/vts/functional/FilterTests.h
index c965d95..6258bac 100644
--- a/tv/tuner/aidl/vts/functional/FilterTests.h
+++ b/tv/tuner/aidl/vts/functional/FilterTests.h
@@ -24,7 +24,9 @@
 #include <log/log.h>
 #include <utils/Condition.h>
 #include <utils/Mutex.h>
+#include <future>
 #include <map>
+#include <unordered_map>
 
 #include <fmq/AidlMessageQueue.h>
 
@@ -58,15 +60,9 @@
 
 class FilterCallback : public BnFilterCallback {
   public:
-    virtual ::ndk::ScopedAStatus onFilterEvent(const vector<DemuxFilterEvent>& events) override {
-        android::Mutex::Autolock autoLock(mMsgLock);
-        // Temprarily we treat the first coming back filter data on the matching pid a success
-        // once all of the MQ are cleared, means we got all the expected output
-        readFilterEventsData(events);
-        mPidFilterOutputCount++;
-        mMsgCondition.signal();
-        return ::ndk::ScopedAStatus::ok();
-    }
+    virtual ::ndk::ScopedAStatus onFilterEvent(const vector<DemuxFilterEvent>& events) override;
+
+    std::future<DemuxFilterEvent> getNextFilterEventWithTag(DemuxFilterEvent::Tag tag);
 
     virtual ::ndk::ScopedAStatus onFilterStatus(const DemuxFilterStatus /*status*/) override {
         return ::ndk::ScopedAStatus::ok();
@@ -89,6 +85,7 @@
     int32_t mFilterId;
     std::shared_ptr<IFilter> mFilter;
 
+    std::unordered_map<DemuxFilterEvent::Tag, std::promise<DemuxFilterEvent>> mFilterEventPromises;
     native_handle_t* mAvSharedHandle = nullptr;
     uint64_t mAvSharedMemSize = -1;
 
diff --git a/tv/tuner/aidl/vts/functional/VtsHalTvTunerTargetTest.cpp b/tv/tuner/aidl/vts/functional/VtsHalTvTunerTargetTest.cpp
index 85e5c68..88890e4 100644
--- a/tv/tuner/aidl/vts/functional/VtsHalTvTunerTargetTest.cpp
+++ b/tv/tuner/aidl/vts/functional/VtsHalTvTunerTargetTest.cpp
@@ -640,6 +640,57 @@
     testTimeFilter(timeFilterMap[timeFilter.timeFilterId]);
 }
 
+// TODO: move boilerplate into text fixture
+TEST_P(TunerFilterAidlTest, FilterTimeDelayHintTest) {
+    description("Test filter delay hint.");
+
+    int32_t feId;
+    int32_t demuxId;
+    std::shared_ptr<IDemux> demux;
+    int64_t filterId;
+
+    mFrontendTests.getFrontendIdByType(frontendMap[live.frontendId].type, feId);
+    ASSERT_TRUE(feId != INVALID_ID);
+    ASSERT_TRUE(mFrontendTests.openFrontendById(feId));
+    ASSERT_TRUE(mFrontendTests.setFrontendCallback());
+    ASSERT_TRUE(mDemuxTests.openDemux(demux, demuxId));
+    ASSERT_TRUE(mDemuxTests.setDemuxFrontendDataSource(feId));
+    mFilterTests.setDemux(demux);
+
+    const auto& filterConf = filterMap[live.ipFilterId];
+    ASSERT_TRUE(mFilterTests.openFilterInDemux(filterConf.type, filterConf.bufferSize));
+    ASSERT_TRUE(mFilterTests.getNewlyOpenedFilterId_64bit(filterId));
+    ASSERT_TRUE(mFilterTests.configFilter(filterConf.settings, filterId));
+    ASSERT_TRUE(mFilterTests.configIpFilterCid(filterConf.ipCid, filterId));
+
+    auto filter = mFilterTests.getFilterById(filterId);
+
+    auto delayValue = std::chrono::milliseconds(5000);
+    FilterDelayHint delayHint;
+    delayHint.hintType = FilterDelayHintType::TIME_DELAY_IN_MS;
+    delayHint.hintValue = delayValue.count();
+
+    auto status = filter->setDelayHint(delayHint);
+    ASSERT_TRUE(status.isOk());
+
+    auto startTime = std::chrono::steady_clock::now();
+    ASSERT_TRUE(mFilterTests.startFilter(filterId));
+
+    auto cb = mFilterTests.getFilterCallbacks().at(filterId);
+    auto future = cb->getNextFilterEventWithTag(DemuxFilterEvent::Tag::ipPayload);
+
+    // block and wait for callback to be received.
+    ASSERT_EQ(future.wait_for(std::chrono::seconds(10)), std::future_status::ready);
+    auto duration = std::chrono::steady_clock::now() - startTime;
+    ASSERT_GE(duration, delayValue);
+
+    // cleanup
+    ASSERT_TRUE(mFilterTests.stopFilter(filterId));
+    ASSERT_TRUE(mFilterTests.closeFilter(filterId));
+    ASSERT_TRUE(mDemuxTests.closeDemux());
+    ASSERT_TRUE(mFrontendTests.closeFrontend());
+}
+
 TEST_P(TunerPlaybackAidlTest, PlaybackDataFlowWithTsSectionFilterTest) {
     description("Feed ts data from playback and configure Ts section filter to get output");
     if (!playback.support || playback.sectionFilterId.compare(emptyHardwareId) == 0) {