diff --git a/audio/2.0/IStreamIn.hal b/audio/2.0/IStreamIn.hal
index e34c95f..6f1f9df 100644
--- a/audio/2.0/IStreamIn.hal
+++ b/audio/2.0/IStreamIn.hal
@@ -91,7 +91,11 @@
      *     to the client;
      *  -- status queue is used for reporting operation status
      *     (e.g. amount of bytes actually read or error code).
-     * The driver operates on a dedicated thread.
+     *
+     * The driver operates on a dedicated thread. The client must ensure that
+     * the thread is given an appropriate priority and assigned to correct
+     * scheduler and cgroup. For this purpose, the method returns identifiers
+     * of the driver thread.
      *
      * @param frameSize the size of a single frame, in bytes.
      * @param framesCount the number of frames in a buffer.
@@ -105,15 +109,15 @@
      *                specified at the stream opening.
      * @return statusMQ a message queue used for passing status from the driver
      *                  using ReadStatus structures.
+     * @return threadInfo identifiers of the driver's dedicated thread.
      */
-    prepareForReading(
-            uint32_t frameSize, uint32_t framesCount,
-            ThreadPriority threadPriority)
+    prepareForReading(uint32_t frameSize, uint32_t framesCount)
     generates (
             Result retval,
             fmq_sync<ReadParameters> commandMQ,
             fmq_sync<uint8_t> dataMQ,
-            fmq_sync<ReadStatus> statusMQ);
+            fmq_sync<ReadStatus> statusMQ,
+            ThreadInfo threadInfo);
 
     /*
      * Return the amount of input frames lost in the audio driver since the last
diff --git a/audio/2.0/IStreamOut.hal b/audio/2.0/IStreamOut.hal
index 2ec080d..9ee32c5 100644
--- a/audio/2.0/IStreamOut.hal
+++ b/audio/2.0/IStreamOut.hal
@@ -85,11 +85,14 @@
      *     to the driver;
      *  -- status queue is used for reporting operation status
      *     (e.g. amount of bytes actually written or error code).
-     * The driver operates on a dedicated thread.
+     *
+     * The driver operates on a dedicated thread. The client must ensure that
+     * the thread is given an appropriate priority and assigned to correct
+     * scheduler and cgroup. For this purpose, the method returns identifiers
+     * of the driver thread.
      *
      * @param frameSize the size of a single frame, in bytes.
      * @param framesCount the number of frames in a buffer.
-     * @param threadPriority priority of the driver thread.
      * @return retval OK if both message queues were created successfully.
      *                INVALID_STATE if the method was already called.
      *                INVALID_ARGUMENTS if there was a problem setting up
@@ -99,15 +102,15 @@
      *                specified at the stream opening.
      * @return statusMQ a message queue used for passing status from the driver
      *                  using WriteStatus structures.
+     * @return threadInfo identifiers of the driver's dedicated thread.
      */
-    prepareForWriting(
-            uint32_t frameSize, uint32_t framesCount,
-            ThreadPriority threadPriority)
+    prepareForWriting(uint32_t frameSize, uint32_t framesCount)
     generates (
             Result retval,
             fmq_sync<WriteCommand> commandMQ,
             fmq_sync<uint8_t> dataMQ,
-            fmq_sync<WriteStatus> statusMQ);
+            fmq_sync<WriteStatus> statusMQ,
+            ThreadInfo threadInfo);
 
     /*
      * Return the number of audio frames written by the audio DSP to DAC since
diff --git a/audio/2.0/default/Android.mk b/audio/2.0/default/Android.mk
index eeea92c..cbeda35 100644
--- a/audio/2.0/default/Android.mk
+++ b/audio/2.0/default/Android.mk
@@ -38,7 +38,6 @@
     libhidltransport \
     libhwbinder \
     liblog \
-    libmediautils \
     libutils \
     android.hardware.audio@2.0 \
     android.hardware.audio.common@2.0 \
diff --git a/audio/2.0/default/StreamIn.cpp b/audio/2.0/default/StreamIn.cpp
index 9c49170..75bf306 100644
--- a/audio/2.0/default/StreamIn.cpp
+++ b/audio/2.0/default/StreamIn.cpp
@@ -20,7 +20,6 @@
 
 #include <android/log.h>
 #include <hardware/audio.h>
-#include <mediautils/SchedulingPolicyService.h>
 #include <utils/Trace.h>
 
 #include "StreamIn.h"
@@ -33,6 +32,8 @@
 namespace V2_0 {
 namespace implementation {
 
+using ::android::hardware::audio::common::V2_0::ThreadInfo;
+
 namespace {
 
 class ReadThread : public Thread {
@@ -43,8 +44,7 @@
             StreamIn::CommandMQ* commandMQ,
             StreamIn::DataMQ* dataMQ,
             StreamIn::StatusMQ* statusMQ,
-            EventFlag* efGroup,
-            ThreadPriority threadPriority)
+            EventFlag* efGroup)
             : Thread(false /*canCallJava*/),
               mStop(stop),
               mStream(stream),
@@ -52,13 +52,10 @@
               mDataMQ(dataMQ),
               mStatusMQ(statusMQ),
               mEfGroup(efGroup),
-              mThreadPriority(threadPriority),
               mBuffer(new uint8_t[dataMQ->getQuantumCount()]) {
     }
     virtual ~ReadThread() {}
 
-    status_t readyToRun() override;
-
   private:
     std::atomic<bool>* mStop;
     audio_stream_in_t* mStream;
@@ -66,7 +63,6 @@
     StreamIn::DataMQ* mDataMQ;
     StreamIn::StatusMQ* mStatusMQ;
     EventFlag* mEfGroup;
-    ThreadPriority mThreadPriority;
     std::unique_ptr<uint8_t[]> mBuffer;
     IStreamIn::ReadParameters mParameters;
     IStreamIn::ReadStatus mStatus;
@@ -77,16 +73,6 @@
     void doRead();
 };
 
-status_t ReadThread::readyToRun() {
-    if (mThreadPriority != ThreadPriority::NORMAL) {
-        int err = requestPriority(
-                getpid(), getTid(), static_cast<int>(mThreadPriority), true /*asynchronous*/);
-        ALOGW_IF(err, "failed to set priority %d for pid %d tid %d; error %d",
-                static_cast<int>(mThreadPriority), getpid(), getTid(), err);
-    }
-    return OK;
-}
-
 void ReadThread::doRead() {
     size_t availableToWrite = mDataMQ->availableToWrite();
     size_t requestedToRead = mParameters.params.read;
@@ -313,14 +299,14 @@
 }
 
 Return<void> StreamIn::prepareForReading(
-        uint32_t frameSize, uint32_t framesCount, ThreadPriority threadPriority,
-        prepareForReading_cb _hidl_cb)  {
+        uint32_t frameSize, uint32_t framesCount, prepareForReading_cb _hidl_cb)  {
     status_t status;
+    ThreadInfo threadInfo = { 0, 0 };
     // Create message queues.
     if (mDataMQ) {
         ALOGE("the client attempts to call prepareForReading twice");
         _hidl_cb(Result::INVALID_STATE,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
     std::unique_ptr<CommandMQ> tempCommandMQ(new CommandMQ(1));
@@ -332,7 +318,7 @@
         ALOGE_IF(!tempDataMQ->isValid(), "data MQ is invalid");
         ALOGE_IF(!tempStatusMQ->isValid(), "status MQ is invalid");
         _hidl_cb(Result::INVALID_ARGUMENTS,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
     // TODO: Remove event flag management once blocking MQ is implemented. b/33815422
@@ -340,7 +326,7 @@
     if (status != OK || !mEfGroup) {
         ALOGE("failed creating event flag for data MQ: %s", strerror(-status));
         _hidl_cb(Result::INVALID_ARGUMENTS,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
 
@@ -351,20 +337,23 @@
             tempCommandMQ.get(),
             tempDataMQ.get(),
             tempStatusMQ.get(),
-            mEfGroup,
-            threadPriority);
+            mEfGroup);
     status = mReadThread->run("reader", PRIORITY_URGENT_AUDIO);
     if (status != OK) {
         ALOGW("failed to start reader thread: %s", strerror(-status));
         _hidl_cb(Result::INVALID_ARGUMENTS,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
 
     mCommandMQ = std::move(tempCommandMQ);
     mDataMQ = std::move(tempDataMQ);
     mStatusMQ = std::move(tempStatusMQ);
-    _hidl_cb(Result::OK, *mCommandMQ->getDesc(), *mDataMQ->getDesc(), *mStatusMQ->getDesc());
+    threadInfo.pid = getpid();
+    threadInfo.tid = mReadThread->getTid();
+    _hidl_cb(Result::OK,
+            *mCommandMQ->getDesc(), *mDataMQ->getDesc(), *mStatusMQ->getDesc(),
+            threadInfo);
     return Void();
 }
 
diff --git a/audio/2.0/default/StreamIn.h b/audio/2.0/default/StreamIn.h
index 3566430..b867387 100644
--- a/audio/2.0/default/StreamIn.h
+++ b/audio/2.0/default/StreamIn.h
@@ -44,7 +44,6 @@
 using ::android::hardware::audio::V2_0::IStreamIn;
 using ::android::hardware::audio::V2_0::ParameterValue;
 using ::android::hardware::audio::V2_0::Result;
-using ::android::hardware::audio::V2_0::ThreadPriority;
 using ::android::hardware::Return;
 using ::android::hardware::Void;
 using ::android::hardware::hidl_vec;
@@ -89,8 +88,7 @@
     Return<void> getAudioSource(getAudioSource_cb _hidl_cb)  override;
     Return<Result> setGain(float gain)  override;
     Return<void> prepareForReading(
-            uint32_t frameSize, uint32_t framesCount, ThreadPriority threadPriority,
-            prepareForReading_cb _hidl_cb)  override;
+            uint32_t frameSize, uint32_t framesCount, prepareForReading_cb _hidl_cb)  override;
     Return<uint32_t> getInputFramesLost()  override;
     Return<void> getCapturePosition(getCapturePosition_cb _hidl_cb)  override;
     Return<Result> start() override;
diff --git a/audio/2.0/default/StreamOut.cpp b/audio/2.0/default/StreamOut.cpp
index 6e46db2..4cd25aa 100644
--- a/audio/2.0/default/StreamOut.cpp
+++ b/audio/2.0/default/StreamOut.cpp
@@ -20,7 +20,6 @@
 
 #include <android/log.h>
 #include <hardware/audio.h>
-#include <mediautils/SchedulingPolicyService.h>
 #include <utils/Trace.h>
 
 #include "StreamOut.h"
@@ -31,6 +30,8 @@
 namespace V2_0 {
 namespace implementation {
 
+using ::android::hardware::audio::common::V2_0::ThreadInfo;
+
 namespace {
 
 class WriteThread : public Thread {
@@ -41,8 +42,7 @@
             StreamOut::CommandMQ* commandMQ,
             StreamOut::DataMQ* dataMQ,
             StreamOut::StatusMQ* statusMQ,
-            EventFlag* efGroup,
-            ThreadPriority threadPriority)
+            EventFlag* efGroup)
             : Thread(false /*canCallJava*/),
               mStop(stop),
               mStream(stream),
@@ -50,13 +50,10 @@
               mDataMQ(dataMQ),
               mStatusMQ(statusMQ),
               mEfGroup(efGroup),
-              mThreadPriority(threadPriority),
               mBuffer(new uint8_t[dataMQ->getQuantumCount()]) {
     }
     virtual ~WriteThread() {}
 
-    status_t readyToRun() override;
-
   private:
     std::atomic<bool>* mStop;
     audio_stream_out_t* mStream;
@@ -64,7 +61,6 @@
     StreamOut::DataMQ* mDataMQ;
     StreamOut::StatusMQ* mStatusMQ;
     EventFlag* mEfGroup;
-    ThreadPriority mThreadPriority;
     std::unique_ptr<uint8_t[]> mBuffer;
     IStreamOut::WriteStatus mStatus;
 
@@ -75,16 +71,6 @@
     void doWrite();
 };
 
-status_t WriteThread::readyToRun() {
-    if (mThreadPriority != ThreadPriority::NORMAL) {
-        int err = requestPriority(
-                getpid(), getTid(), static_cast<int>(mThreadPriority), true /*asynchronous*/);
-        ALOGW_IF(err, "failed to set priority %d for pid %d tid %d; error %d",
-                static_cast<int>(mThreadPriority), getpid(), getTid(), err);
-    }
-    return OK;
-}
-
 void WriteThread::doWrite() {
     const size_t availToRead = mDataMQ->availableToRead();
     mStatus.retval = Result::OK;
@@ -297,14 +283,14 @@
 }
 
 Return<void> StreamOut::prepareForWriting(
-        uint32_t frameSize, uint32_t framesCount, ThreadPriority threadPriority,
-        prepareForWriting_cb _hidl_cb)  {
+        uint32_t frameSize, uint32_t framesCount, prepareForWriting_cb _hidl_cb)  {
     status_t status;
+    ThreadInfo threadInfo = { 0, 0 };
     // Create message queues.
     if (mDataMQ) {
         ALOGE("the client attempts to call prepareForWriting twice");
         _hidl_cb(Result::INVALID_STATE,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
     std::unique_ptr<CommandMQ> tempCommandMQ(new CommandMQ(1));
@@ -316,7 +302,7 @@
         ALOGE_IF(!tempDataMQ->isValid(), "data MQ is invalid");
         ALOGE_IF(!tempStatusMQ->isValid(), "status MQ is invalid");
         _hidl_cb(Result::INVALID_ARGUMENTS,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
     // TODO: Remove event flag management once blocking MQ is implemented. b/33815422
@@ -324,7 +310,7 @@
     if (status != OK || !mEfGroup) {
         ALOGE("failed creating event flag for data MQ: %s", strerror(-status));
         _hidl_cb(Result::INVALID_ARGUMENTS,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
 
@@ -335,20 +321,23 @@
             tempCommandMQ.get(),
             tempDataMQ.get(),
             tempStatusMQ.get(),
-            mEfGroup,
-            threadPriority);
+            mEfGroup);
     status = mWriteThread->run("writer", PRIORITY_URGENT_AUDIO);
     if (status != OK) {
         ALOGW("failed to start writer thread: %s", strerror(-status));
         _hidl_cb(Result::INVALID_ARGUMENTS,
-                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor());
+                CommandMQ::Descriptor(), DataMQ::Descriptor(), StatusMQ::Descriptor(), threadInfo);
         return Void();
     }
 
     mCommandMQ = std::move(tempCommandMQ);
     mDataMQ = std::move(tempDataMQ);
     mStatusMQ = std::move(tempStatusMQ);
-    _hidl_cb(Result::OK, *mCommandMQ->getDesc(), *mDataMQ->getDesc(), *mStatusMQ->getDesc());
+    threadInfo.pid = getpid();
+    threadInfo.tid = mWriteThread->getTid();
+    _hidl_cb(Result::OK,
+            *mCommandMQ->getDesc(), *mDataMQ->getDesc(), *mStatusMQ->getDesc(),
+            threadInfo);
     return Void();
 }
 
diff --git a/audio/2.0/default/StreamOut.h b/audio/2.0/default/StreamOut.h
index 6616557..bbe64a1 100644
--- a/audio/2.0/default/StreamOut.h
+++ b/audio/2.0/default/StreamOut.h
@@ -45,7 +45,6 @@
 using ::android::hardware::audio::V2_0::IStreamOutCallback;
 using ::android::hardware::audio::V2_0::ParameterValue;
 using ::android::hardware::audio::V2_0::Result;
-using ::android::hardware::audio::V2_0::ThreadPriority;
 using ::android::hardware::audio::V2_0::TimeSpec;
 using ::android::hardware::Return;
 using ::android::hardware::Void;
@@ -91,8 +90,7 @@
     Return<uint32_t> getLatency()  override;
     Return<Result> setVolume(float left, float right)  override;
     Return<void> prepareForWriting(
-            uint32_t frameSize, uint32_t framesCount, ThreadPriority threadPriority,
-            prepareForWriting_cb _hidl_cb)  override;
+            uint32_t frameSize, uint32_t framesCount, prepareForWriting_cb _hidl_cb)  override;
     Return<void> getRenderPosition(getRenderPosition_cb _hidl_cb)  override;
     Return<void> getNextWriteTimestamp(getNextWriteTimestamp_cb _hidl_cb)  override;
     Return<Result> setCallback(const sp<IStreamOutCallback>& callback)  override;
diff --git a/audio/2.0/types.hal b/audio/2.0/types.hal
index 8fc4314..8e9ff14 100644
--- a/audio/2.0/types.hal
+++ b/audio/2.0/types.hal
@@ -98,12 +98,3 @@
     NOT_EMPTY = 1 << 0,
     NOT_FULL = 1 << 1
 };
-
-/*
- * The priority of threads executing reads and writes of audio data.
- */
-enum ThreadPriority : int32_t {
-    NORMAL = 0,
-    FAST_CAPTURE = 3,
-    FAST_MIXER = 3
-};
diff --git a/audio/common/2.0/types.hal b/audio/common/2.0/types.hal
index 63d66db..ae7f545 100644
--- a/audio/common/2.0/types.hal
+++ b/audio/common/2.0/types.hal
@@ -933,3 +933,8 @@
         AudioPortSessionExt session;
     } ext;
 };
+
+struct ThreadInfo {
+    int64_t pid;
+    int64_t tid;
+};