diff --git a/media/libaudioprocessing/AudioMixer.cpp b/media/libaudioprocessing/AudioMixer.cpp
index 1a31420..2ea215f 100644
--- a/media/libaudioprocessing/AudioMixer.cpp
+++ b/media/libaudioprocessing/AudioMixer.cpp
@@ -423,7 +423,7 @@
             }
             } break;
         case HAPTIC_INTENSITY: {
-            const haptic_intensity_t hapticIntensity = static_cast<haptic_intensity_t>(valueInt);
+            const os::HapticScale hapticIntensity = static_cast<os::HapticScale>(valueInt);
             if (track->mHapticIntensity != hapticIntensity) {
                 track->mHapticIntensity = hapticIntensity;
             }
@@ -545,7 +545,7 @@
     t->mPlaybackRate = AUDIO_PLAYBACK_RATE_DEFAULT;
     // haptic
     t->mHapticPlaybackEnabled = false;
-    t->mHapticIntensity = HAPTIC_SCALE_NONE;
+    t->mHapticIntensity = os::HapticScale::NONE;
     t->mMixerHapticChannelMask = AUDIO_CHANNEL_NONE;
     t->mMixerHapticChannelCount = 0;
     t->mAdjustInChannelCount = t->channelCount + t->mHapticChannelCount;
@@ -590,19 +590,12 @@
             const std::shared_ptr<Track> &t = getTrack(name);
             if (t->mHapticPlaybackEnabled) {
                 size_t sampleCount = mFrameCount * t->mMixerHapticChannelCount;
-                float gamma = t->getHapticScaleGamma();
-                float maxAmplitudeRatio = t->getHapticMaxAmplitudeRatio();
                 uint8_t* buffer = (uint8_t*)pair.first + mFrameCount * audio_bytes_per_frame(
                         t->mMixerChannelCount, t->mMixerFormat);
                 switch (t->mMixerFormat) {
                 // Mixer format should be AUDIO_FORMAT_PCM_FLOAT.
                 case AUDIO_FORMAT_PCM_FLOAT: {
-                    float* fout = (float*) buffer;
-                    for (size_t i = 0; i < sampleCount; i++) {
-                        float mul = fout[i] >= 0 ? 1.0 : -1.0;
-                        fout[i] = powf(fabsf(fout[i] / HAPTIC_MAX_AMPLITUDE_FLOAT), gamma)
-                                * maxAmplitudeRatio * HAPTIC_MAX_AMPLITUDE_FLOAT * mul;
-                    }
+                    os::scaleHapticData((float*) buffer, sampleCount, t->mHapticIntensity);
                 } break;
                 default:
                     LOG_ALWAYS_FATAL("bad mMixerFormat: %#x", t->mMixerFormat);
diff --git a/media/libaudioprocessing/include/media/AudioMixer.h b/media/libaudioprocessing/include/media/AudioMixer.h
index 3f7cd48..70eafe3 100644
--- a/media/libaudioprocessing/include/media/AudioMixer.h
+++ b/media/libaudioprocessing/include/media/AudioMixer.h
@@ -22,10 +22,10 @@
 #include <stdint.h>
 #include <sys/types.h>
 
-#include <android/os/IExternalVibratorService.h>
 #include <media/AudioMixerBase.h>
 #include <media/BufferProviders.h>
 #include <utils/threads.h>
+#include <vibrator/ExternalVibrationUtils.h>
 
 // FIXME This is actually unity gain, which might not be max in future, expressed in U.12
 #define MAX_GAIN_INT AudioMixerBase::UNITY_GAIN_INT
@@ -55,32 +55,6 @@
                                   // parameter 'value' is a pointer to the new playback rate.
     };
 
-    typedef enum { // Haptic intensity, should keep consistent with VibratorService
-        HAPTIC_SCALE_MUTE = os::IExternalVibratorService::SCALE_MUTE,
-        HAPTIC_SCALE_VERY_LOW = os::IExternalVibratorService::SCALE_VERY_LOW,
-        HAPTIC_SCALE_LOW = os::IExternalVibratorService::SCALE_LOW,
-        HAPTIC_SCALE_NONE = os::IExternalVibratorService::SCALE_NONE,
-        HAPTIC_SCALE_HIGH = os::IExternalVibratorService::SCALE_HIGH,
-        HAPTIC_SCALE_VERY_HIGH = os::IExternalVibratorService::SCALE_VERY_HIGH,
-    } haptic_intensity_t;
-    static constexpr float HAPTIC_SCALE_VERY_LOW_RATIO = 2.0f / 3.0f;
-    static constexpr float HAPTIC_SCALE_LOW_RATIO = 3.0f / 4.0f;
-    static const constexpr float HAPTIC_MAX_AMPLITUDE_FLOAT = 1.0f;
-
-    static inline bool isValidHapticIntensity(haptic_intensity_t hapticIntensity) {
-        switch (hapticIntensity) {
-        case HAPTIC_SCALE_MUTE:
-        case HAPTIC_SCALE_VERY_LOW:
-        case HAPTIC_SCALE_LOW:
-        case HAPTIC_SCALE_NONE:
-        case HAPTIC_SCALE_HIGH:
-        case HAPTIC_SCALE_VERY_HIGH:
-            return true;
-        default:
-            return false;
-        }
-    }
-
     AudioMixer(size_t frameCount, uint32_t sampleRate)
             : AudioMixerBase(frameCount, sampleRate) {
         pthread_once(&sOnceControl, &sInitRoutine);
@@ -170,7 +144,7 @@
 
         // Haptic
         bool                 mHapticPlaybackEnabled;
-        haptic_intensity_t   mHapticIntensity;
+        os::HapticScale      mHapticIntensity;
         audio_channel_mask_t mHapticChannelMask;
         uint32_t             mHapticChannelCount;
         audio_channel_mask_t mMixerHapticChannelMask;
@@ -180,38 +154,6 @@
         uint32_t             mAdjustNonDestructiveInChannelCount;
         uint32_t             mAdjustNonDestructiveOutChannelCount;
         bool                 mKeepContractedChannels;
-
-        float getHapticScaleGamma() const {
-        // Need to keep consistent with the value in VibratorService.
-        switch (mHapticIntensity) {
-        case HAPTIC_SCALE_VERY_LOW:
-            return 2.0f;
-        case HAPTIC_SCALE_LOW:
-            return 1.5f;
-        case HAPTIC_SCALE_HIGH:
-            return 0.5f;
-        case HAPTIC_SCALE_VERY_HIGH:
-            return 0.25f;
-        default:
-            return 1.0f;
-        }
-        }
-
-        float getHapticMaxAmplitudeRatio() const {
-        // Need to keep consistent with the value in VibratorService.
-        switch (mHapticIntensity) {
-        case HAPTIC_SCALE_VERY_LOW:
-            return HAPTIC_SCALE_VERY_LOW_RATIO;
-        case HAPTIC_SCALE_LOW:
-            return HAPTIC_SCALE_LOW_RATIO;
-        case HAPTIC_SCALE_NONE:
-        case HAPTIC_SCALE_HIGH:
-        case HAPTIC_SCALE_VERY_HIGH:
-            return 1.0f;
-        default:
-            return 0.0f;
-        }
-        }
     };
 
     inline std::shared_ptr<Track> getTrack(int name) {
diff --git a/media/libeffects/hapticgenerator/Android.bp b/media/libeffects/hapticgenerator/Android.bp
index ac40e33..f947339 100644
--- a/media/libeffects/hapticgenerator/Android.bp
+++ b/media/libeffects/hapticgenerator/Android.bp
@@ -36,8 +36,10 @@
 
     shared_libs: [
         "libaudioutils",
+        "libbinder",
         "liblog",
         "libutils",
+        "libvibrator",
     ],
 
     relative_install_path: "soundfx",
diff --git a/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp b/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp
index 2a41ed5..311e5ba 100644
--- a/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp
+++ b/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp
@@ -96,7 +96,10 @@
     context->config.outputCfg.bufferProvider.cookie = nullptr;
     context->config.outputCfg.mask = EFFECT_CONFIG_ALL;
 
-    memset(&context->param, 0, sizeof(struct HapticGeneratorParam));
+    memset(context->param.hapticChannelSource, 0, sizeof(context->param.hapticChannelSource));
+    context->param.hapticChannelCount = 0;
+    context->param.audioChannelCount = 0;
+    context->param.maxHapticIntensity = os::HapticScale::MUTE;
 
     context->state = HAPTICGENERATOR_STATE_INITIALIZED;
     return 0;
@@ -236,12 +239,36 @@
     return 0;
 }
 
-int HapticGenerator_SetParameter(struct HapticGeneratorContext *context __unused,
-                                 int32_t param __unused,
-                                 uint32_t size __unused,
-                                 void *value __unused) {
-    ALOGW("Setparameter is not implemented in HapticGenerator");
-    return -ENOSYS;
+int HapticGenerator_SetParameter(struct HapticGeneratorContext *context,
+                                 int32_t param,
+                                 uint32_t size,
+                                 void *value) {
+    switch (param) {
+    case HG_PARAM_HAPTIC_INTENSITY: {
+        if (value == nullptr || size != (uint32_t) (2 * sizeof(int))) {
+            return -EINVAL;
+        }
+        int id = *(int *) value;
+        os::HapticScale hapticIntensity = static_cast<os::HapticScale>(*((int *) value + 1));
+        if (hapticIntensity == os::HapticScale::MUTE) {
+            context->param.id2Intensity.erase(id);
+        } else {
+            context->param.id2Intensity.emplace(id, hapticIntensity);
+        }
+        context->param.maxHapticIntensity = hapticIntensity;
+        for (const auto&[id, intensity] : context->param.id2Intensity) {
+            context->param.maxHapticIntensity = std::max(
+                    context->param.maxHapticIntensity, intensity);
+        }
+        break;
+    }
+
+    default:
+        ALOGW("Unknown param: %d", param);
+        return -EINVAL;
+    }
+
+    return 0;
 }
 
 /**
@@ -346,6 +373,11 @@
         return -ENODATA;
     }
 
+    if (context->param.maxHapticIntensity == os::HapticScale::MUTE) {
+        // Haptic channels are muted, not need to generate haptic data.
+        return 0;
+    }
+
     // Resize buffer if the haptic sample count is greater than buffer size.
     size_t hapticSampleCount = inBuffer->frameCount * context->param.hapticChannelCount;
     if (hapticSampleCount > context->inputBuffer.size()) {
@@ -367,6 +399,7 @@
     float* hapticOutBuffer = HapticGenerator_runProcessingChain(
             context->processingChain, context->inputBuffer.data(),
             context->outputBuffer.data(), inBuffer->frameCount);
+    os::scaleHapticData(hapticOutBuffer, hapticSampleCount, context->param.maxHapticIntensity);
 
     // For haptic data, the haptic playback thread will copy the data from effect input buffer,
     // which contains haptic data at the end of the buffer, directly to sink buffer.
diff --git a/media/libeffects/hapticgenerator/EffectHapticGenerator.h b/media/libeffects/hapticgenerator/EffectHapticGenerator.h
index 4a2308b..a5688de 100644
--- a/media/libeffects/hapticgenerator/EffectHapticGenerator.h
+++ b/media/libeffects/hapticgenerator/EffectHapticGenerator.h
@@ -19,9 +19,11 @@
 
 #include <functional>
 #include <vector>
+#include <map>
 
 #include <hardware/audio_effect.h>
 #include <system/audio_effect.h>
+#include <vibrator/ExternalVibrationUtils.h>
 
 #include "Processors.h"
 
@@ -45,6 +47,10 @@
                                      // The value will be offset of audio channel
     uint32_t audioChannelCount;
     uint32_t hapticChannelCount;
+
+    // A map from track id to haptic intensity.
+    std::map<int, os::HapticScale> id2Intensity;
+    os::HapticScale maxHapticIntensity; // max intensity will be used to scale haptic data.
 };
 
 // A structure to keep all shared pointers for all processors in HapticGenerator.
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index fde583c..136ae98 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -399,7 +399,7 @@
             return ret;
         }
     }
-    return AudioMixer::HAPTIC_SCALE_MUTE;
+    return static_cast<int>(os::HapticScale::MUTE);
 }
 
 /* static */
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 01dd203..d3ad908 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -98,6 +98,7 @@
 #include <private/media/AudioTrackShared.h>
 
 #include <vibrator/ExternalVibration.h>
+#include <vibrator/ExternalVibrationUtils.h>
 
 #include "android/media/BnAudioRecord.h"
 
diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index c192b85..9ee47c9 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -1537,6 +1537,33 @@
     return isHapticGenerator(&mDescriptor.type);
 }
 
+status_t AudioFlinger::EffectModule::setHapticIntensity(int id, int intensity)
+{
+    if (mStatus != NO_ERROR) {
+        return mStatus;
+    }
+    if (!isHapticGenerator()) {
+        ALOGW("Should not set haptic intensity for effects that are not HapticGenerator");
+        return INVALID_OPERATION;
+    }
+
+    uint32_t buf32[sizeof(effect_param_t) / sizeof(uint32_t) + 3];
+    effect_param_t *param = (effect_param_t*) buf32;
+    param->psize = sizeof(int32_t);
+    param->vsize = sizeof(int32_t) * 2;
+    *(int32_t*)param->data = HG_PARAM_HAPTIC_INTENSITY;
+    *((int32_t*)param->data + 1) = id;
+    *((int32_t*)param->data + 2) = intensity;
+    uint32_t size = sizeof(int32_t);
+    status_t status = command(
+            EFFECT_CMD_SET_PARAM, sizeof(effect_param_t) + param->psize + param->vsize,
+            param, &size, &param->status);
+    if (status == NO_ERROR) {
+        status = param->status;
+    }
+    return status;
+}
+
 static std::string dumpInOutBuffer(bool isInput, const sp<EffectBufferHalInterface> &buffer) {
     std::stringstream ss;
 
@@ -2411,6 +2438,14 @@
     return false;
 }
 
+void AudioFlinger::EffectChain::setHapticIntensity_l(int id, int intensity)
+{
+    Mutex::Autolock _l(mLock);
+    for (size_t i = 0; i < mEffects.size(); ++i) {
+        mEffects[i]->setHapticIntensity(id, intensity);
+    }
+}
+
 void AudioFlinger::EffectChain::syncHalEffectsState()
 {
     Mutex::Autolock _l(mLock);
diff --git a/services/audioflinger/Effects.h b/services/audioflinger/Effects.h
index 036f855..3cc5a44 100644
--- a/services/audioflinger/Effects.h
+++ b/services/audioflinger/Effects.h
@@ -261,6 +261,8 @@
     static bool      isHapticGenerator(const effect_uuid_t* type);
     bool             isHapticGenerator() const;
 
+    status_t         setHapticIntensity(int id, int intensity);
+
     void             dump(int fd, const Vector<String16>& args);
 
 private:
@@ -509,6 +511,8 @@
 
     bool containsHapticGeneratingEffect_l();
 
+    void setHapticIntensity_l(int id, int intensity);
+
     sp<EffectCallbackInterface> effectCallback() const { return mEffectCallback; }
     wp<ThreadBase> thread() const { return mEffectCallback->thread(); }
 
diff --git a/services/audioflinger/FastMixerState.h b/services/audioflinger/FastMixerState.h
index 396c797..857d3de 100644
--- a/services/audioflinger/FastMixerState.h
+++ b/services/audioflinger/FastMixerState.h
@@ -23,6 +23,7 @@
 #include <media/ExtendedAudioBufferProvider.h>
 #include <media/nbaio/NBAIO.h>
 #include <media/nblog/NBLog.h>
+#include <vibrator/ExternalVibrationUtils.h>
 #include "FastThreadState.h"
 
 namespace android {
@@ -49,8 +50,7 @@
     audio_format_t          mFormat;         // track format
     int                     mGeneration;     // increment when any field is assigned
     bool                    mHapticPlaybackEnabled = false; // haptic playback is enabled or not
-    AudioMixer::haptic_intensity_t mHapticIntensity = AudioMixer::HAPTIC_SCALE_MUTE; // intensity of
-                                                                                     // haptic data
+    os::HapticScale         mHapticIntensity = os::HapticScale::MUTE; // intensity of haptic data
 };
 
 // Represents a single state of the fast mixer
diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index d8eebf3..d05c8b8 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -159,12 +159,12 @@
                 mHapticPlaybackEnabled = hapticPlaybackEnabled;
             }
             /** Return at what intensity to play haptics, used in mixer. */
-            AudioMixer::haptic_intensity_t getHapticIntensity() const { return mHapticIntensity; }
+            os::HapticScale getHapticIntensity() const { return mHapticIntensity; }
             /** Set intensity of haptic playback, should be set after querying vibrator service. */
-            void    setHapticIntensity(AudioMixer::haptic_intensity_t hapticIntensity) {
-                if (AudioMixer::isValidHapticIntensity(hapticIntensity)) {
+            void    setHapticIntensity(os::HapticScale hapticIntensity) {
+                if (os::isValidHapticScale(hapticIntensity)) {
                     mHapticIntensity = hapticIntensity;
-                    setHapticPlaybackEnabled(mHapticIntensity != AudioMixer::HAPTIC_SCALE_MUTE);
+                    setHapticPlaybackEnabled(mHapticIntensity != os::HapticScale::MUTE);
                 }
             }
             sp<os::ExternalVibration> getExternalVibration() const { return mExternalVibration; }
@@ -265,7 +265,7 @@
 
     bool                mHapticPlaybackEnabled = false; // indicates haptic playback enabled or not
     // intensity to play haptic data
-    AudioMixer::haptic_intensity_t mHapticIntensity = AudioMixer::HAPTIC_SCALE_MUTE;
+    os::HapticScale mHapticIntensity = os::HapticScale::MUTE;
     class AudioVibrationController : public os::BnExternalVibrationController {
     public:
         explicit AudioVibrationController(Track* track) : mTrack(track) {}
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index b6a50a5..92f18c1 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -2548,7 +2548,7 @@
             const int intensity = AudioFlinger::onExternalVibrationStart(
                     track->getExternalVibration());
             mLock.lock();
-            track->setHapticIntensity(static_cast<AudioMixer::haptic_intensity_t>(intensity));
+            track->setHapticIntensity(static_cast<os::HapticScale>(intensity));
             // Haptic playback should be enabled by vibrator service.
             if (track->getHapticPlaybackEnabled()) {
                 // Disable haptic playback of all active track to ensure only
@@ -2557,6 +2557,11 @@
                     t->setHapticPlaybackEnabled(false);
                 }
             }
+
+            // Set haptic intensity for effect
+            if (chain != nullptr) {
+                chain->setHapticIntensity_l(track->id(), intensity);
+            }
         }
 
         track->mResetDone = false;
@@ -4130,6 +4135,12 @@
             // call Tracks.mute/unmute which also require thread's lock.
             AudioFlinger::onExternalVibrationStop(track->getExternalVibration());
             mLock.lock();
+
+            // When the track is stop, set the haptic intensity as MUTE
+            // for the HapticGenerator effect.
+            if (chain != nullptr) {
+                chain->setHapticIntensity_l(track->id(), static_cast<int>(os::HapticScale::MUTE));
+            }
         }
     }
 }
@@ -4472,7 +4483,7 @@
                                                                      // audio to FastMixer
         fastTrack->mFormat = mFormat; // mPipeSink format for audio to FastMixer
         fastTrack->mHapticPlaybackEnabled = mHapticChannelMask != AUDIO_CHANNEL_NONE;
-        fastTrack->mHapticIntensity = AudioMixer::HAPTIC_SCALE_NONE;
+        fastTrack->mHapticIntensity = os::HapticScale::NONE;
         fastTrack->mGeneration++;
         state->mFastTracksGen++;
         state->mTrackMask = 1;