diff --git a/vibrator/aidl/android/hardware/vibrator/IVibrator.aidl b/vibrator/aidl/android/hardware/vibrator/IVibrator.aidl
index ebf5faa..f553664 100644
--- a/vibrator/aidl/android/hardware/vibrator/IVibrator.aidl
+++ b/vibrator/aidl/android/hardware/vibrator/IVibrator.aidl
@@ -48,6 +48,10 @@
      * Whether compose is supported.
      */
     const int CAP_COMPOSE_EFFECTS = 1 << 5;
+    /**
+     * Whether alwaysOnEnable/alwaysOnDisable is supported.
+     */
+    const int CAP_ALWAYS_ON_CONTROL = 1 << 6;
 
     /**
      * Determine capabilities of the vibrator HAL (CAP_* mask)
@@ -165,4 +169,31 @@
      */
     void compose(in CompositeEffect[] composite, in IVibratorCallback callback);
 
+    /**
+     * List of supported always-on effects.
+     *
+     * Return the effects which are supported by the alwaysOnEnable (an effect
+     * is expected to be supported at every strength level.
+     */
+    Effect[] getSupportedAlwaysOnEffects();
+
+    /**
+     * Enable an always-on haptic source, assigning a specific effect. An
+     * always-on haptic source is a source that can be triggered externally
+     * once enabled and assigned an effect to play. This may not be supported
+     * and this support is reflected in getCapabilities (CAP_ALWAYS_ON_CONTROL).
+     *
+     * @param id The device-specific always-on source ID to enable.
+     * @param effect The type of haptic event to trigger.
+     * @param strength The intensity of haptic event to trigger.
+     */
+    void alwaysOnEnable(in int id, in Effect effect, in EffectStrength strength);
+
+    /**
+     * Disable an always-on haptic source. This may not be supported and this
+     * support is reflected in getCapabilities (CAP_ALWAYS_ON_CONTROL).
+     *
+     * @param id The device-specific always-on source ID to disable.
+     */
+    void alwaysOnDisable(in int id);
 }
diff --git a/vibrator/aidl/default/Vibrator.cpp b/vibrator/aidl/default/Vibrator.cpp
index befdeab..cedd9cb 100644
--- a/vibrator/aidl/default/Vibrator.cpp
+++ b/vibrator/aidl/default/Vibrator.cpp
@@ -31,7 +31,8 @@
     LOG(INFO) << "Vibrator reporting capabilities";
     *_aidl_return = IVibrator::CAP_ON_CALLBACK | IVibrator::CAP_PERFORM_CALLBACK |
                     IVibrator::CAP_AMPLITUDE_CONTROL | IVibrator::CAP_EXTERNAL_CONTROL |
-                    IVibrator::CAP_EXTERNAL_AMPLITUDE_CONTROL | IVibrator::CAP_COMPOSE_EFFECTS;
+                    IVibrator::CAP_EXTERNAL_AMPLITUDE_CONTROL | IVibrator::CAP_COMPOSE_EFFECTS |
+                    IVibrator::CAP_ALWAYS_ON_CONTROL;
     return ndk::ScopedAStatus::ok();
 }
 
@@ -151,6 +152,28 @@
     return ndk::ScopedAStatus::ok();
 }
 
+ndk::ScopedAStatus Vibrator::getSupportedAlwaysOnEffects(std::vector<Effect>* _aidl_return) {
+    return getSupportedEffects(_aidl_return);
+}
+
+ndk::ScopedAStatus Vibrator::alwaysOnEnable(int32_t id, Effect effect, EffectStrength strength) {
+    std::vector<Effect> effects;
+    getSupportedAlwaysOnEffects(&effects);
+
+    if (std::find(effects.begin(), effects.end(), effect) == effects.end()) {
+        return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+    } else {
+        LOG(INFO) << "Enabling always-on ID " << id << " with " << toString(effect) << "/"
+                  << toString(strength);
+        return ndk::ScopedAStatus::ok();
+    }
+}
+
+ndk::ScopedAStatus Vibrator::alwaysOnDisable(int32_t id) {
+    LOG(INFO) << "Disabling always-on ID " << id;
+    return ndk::ScopedAStatus::ok();
+}
+
 }  // namespace vibrator
 }  // namespace hardware
 }  // namespace android
diff --git a/vibrator/aidl/default/include/vibrator-impl/Vibrator.h b/vibrator/aidl/default/include/vibrator-impl/Vibrator.h
index 817ec80..0eb957d 100644
--- a/vibrator/aidl/default/include/vibrator-impl/Vibrator.h
+++ b/vibrator/aidl/default/include/vibrator-impl/Vibrator.h
@@ -38,6 +38,9 @@
     ndk::ScopedAStatus getCompositionSizeMax(int32_t* maxSize);
     ndk::ScopedAStatus compose(const std::vector<CompositeEffect>& composite,
                                const std::shared_ptr<IVibratorCallback>& callback) override;
+    ndk::ScopedAStatus getSupportedAlwaysOnEffects(std::vector<Effect>* _aidl_return) override;
+    ndk::ScopedAStatus alwaysOnEnable(int32_t id, Effect effect, EffectStrength strength) override;
+    ndk::ScopedAStatus alwaysOnDisable(int32_t id) override;
 };
 
 }  // namespace vibrator
diff --git a/vibrator/aidl/vts/VtsHalVibratorTargetTest.cpp b/vibrator/aidl/vts/VtsHalVibratorTargetTest.cpp
index 6f9ba1a..f47b10d 100644
--- a/vibrator/aidl/vts/VtsHalVibratorTargetTest.cpp
+++ b/vibrator/aidl/vts/VtsHalVibratorTargetTest.cpp
@@ -370,6 +370,32 @@
     }
 }
 
+TEST_P(VibratorAidl, AlwaysOn) {
+    if (capabilities & IVibrator::CAP_ALWAYS_ON_CONTROL) {
+        std::vector<Effect> supported;
+        ASSERT_TRUE(vibrator->getSupportedAlwaysOnEffects(&supported).isOk());
+
+        for (Effect effect : kEffects) {
+            bool isEffectSupported =
+                    std::find(supported.begin(), supported.end(), effect) != supported.end();
+
+            for (EffectStrength strength : kEffectStrengths) {
+                Status status = vibrator->alwaysOnEnable(0, effect, strength);
+
+                if (isEffectSupported) {
+                    EXPECT_EQ(Status::EX_NONE, status.exceptionCode())
+                            << toString(effect) << " " << toString(strength);
+                } else {
+                    EXPECT_EQ(Status::EX_UNSUPPORTED_OPERATION, status.exceptionCode())
+                            << toString(effect) << " " << toString(strength);
+                }
+            }
+        }
+
+        EXPECT_EQ(Status::EX_NONE, vibrator->alwaysOnDisable(0).exceptionCode());
+    }
+}
+
 INSTANTIATE_TEST_SUITE_P(Vibrator, VibratorAidl,
                          testing::ValuesIn(android::getAidlHalInstanceNames(IVibrator::descriptor)),
                          android::PrintInstanceNameToString);