diff --git a/biometrics/fingerprint/2.2/IBiometricsFingerprint.hal b/biometrics/fingerprint/2.2/IBiometricsFingerprint.hal
index 0651034..249830a 100644
--- a/biometrics/fingerprint/2.2/IBiometricsFingerprint.hal
+++ b/biometrics/fingerprint/2.2/IBiometricsFingerprint.hal
@@ -17,42 +17,12 @@
 package android.hardware.biometrics.fingerprint@2.2;
 
 import @2.1::IBiometricsFingerprint;
-import @2.1::RequestStatus;
 
+/**
+ * The HAL interface for biometric fingerprint authentication.
+ *
+ * This interface is required because all top-level interfaces need to be
+ * updated in a minor uprev.
+ */
 interface IBiometricsFingerprint extends @2.1::IBiometricsFingerprint {
-    /**
-     * Fingerprint enroll request:
-     * Switches the HAL state machine to collect and store a new fingerprint
-     * template. Switches back as soon as enroll is complete, signalled by
-     * (fingerprintMsg.type == FINGERPRINT_TEMPLATE_ENROLLING &&
-     *  fingerprintMsg.data.enroll.samplesRemaining == 0)
-     * or after timeoutSec seconds.
-     * The fingerprint template must be assigned to the group gid.
-     *
-     * @param hat a valid Hardware Authentication Token (HAT), generated
-     * as a result of a preEnroll() call.
-     * @param gid a framework defined fingerprint set (group) id.
-     * @param timeoutSec a timeout in seconds.
-     * @param windowId optional ID of an illumination window for optical under
-     * display fingerprint sensors. Must contain a null pointer if not used.
-     *
-     * @return debugErrno is a value the framework logs in case it is not 0.
-     *
-     * A notify() function may be called with a more detailed error structure.
-     */
-    enroll_2_2(vec<uint8_t> hat, uint32_t gid, uint32_t timeoutSec, handle windowId)
-        generates (RequestStatus debugErrno);
-
-    /**
-     * Authenticates an operation identified by operationId
-     *
-     * @param operationId operation id.
-     * @param gid fingerprint group id.
-     * @param windowId optional ID of an illumination window for optical under
-     * display fingerprint sensors. Must contain a null pointer if not used.
-     *
-     * @return debugErrno is a value the framework logs in case it is not 0.
-     */
-    authenticate_2_2(uint64_t operationId, uint32_t gid, handle windowId)
-        generates (RequestStatus debugErrno);
 };
diff --git a/biometrics/fingerprint/2.2/vts/functional/VtsHalBiometricsFingerprintV2_2TargetTest.cpp b/biometrics/fingerprint/2.2/vts/functional/VtsHalBiometricsFingerprintV2_2TargetTest.cpp
index 50bd4ab..df29fd4 100644
--- a/biometrics/fingerprint/2.2/vts/functional/VtsHalBiometricsFingerprintV2_2TargetTest.cpp
+++ b/biometrics/fingerprint/2.2/vts/functional/VtsHalBiometricsFingerprintV2_2TargetTest.cpp
@@ -18,65 +18,66 @@
 
 #include <VtsHalHidlTargetCallbackBase.h>
 #include <android-base/properties.h>
-#include <android/hardware/biometrics/fingerprint/2.1/IBiometricsFingerprintClientCallback.h>
-#include <android/hardware/biometrics/fingerprint/2.2/IBiometricsFingerprint.h>
+#include <android/hardware/biometrics/fingerprint/2.1/IBiometricsFingerprint.h>
+#include <android/hardware/biometrics/fingerprint/2.2/IBiometricsFingerprintClientCallback.h>
 #include <gtest/gtest.h>
 #include <hidl/GtestPrinter.h>
 #include <hidl/HidlSupport.h>
 #include <hidl/ServiceManagement.h>
 
 #include <cinttypes>
-#include <random>
+
+namespace {
+
+namespace hidl_interface = android::hardware::biometrics::fingerprint::V2_1;
+namespace hidl_interface_2_2 = android::hardware::biometrics::fingerprint::V2_2;
+
+using hidl_interface::FingerprintError;
+using hidl_interface::IBiometricsFingerprint;
+using hidl_interface::RequestStatus;
 
 using android::sp;
 using android::base::GetUintProperty;
-using android::hardware::hidl_handle;
 using android::hardware::hidl_vec;
 using android::hardware::Return;
 using android::hardware::Void;
-using android::hardware::biometrics::fingerprint::V2_1::FingerprintAcquiredInfo;
-using android::hardware::biometrics::fingerprint::V2_1::FingerprintError;
-using android::hardware::biometrics::fingerprint::V2_1::IBiometricsFingerprintClientCallback;
-using android::hardware::biometrics::fingerprint::V2_1::RequestStatus;
-using android::hardware::biometrics::fingerprint::V2_2::IBiometricsFingerprint;
-
-namespace {
 
 constexpr uint32_t kTimeoutSec = 3;
 constexpr auto kTimeout = std::chrono::seconds(kTimeoutSec);
 constexpr uint32_t kGroupId = 99;
-constexpr char kCallbackNameOnError[] = "onError";
+constexpr char kCallbackNameOnAcquired[] = "onAcquired";
 
 // Callback arguments that need to be captured for the tests.
 struct FingerprintCallbackArgs {
-    // The error passed to the last onError() callback.
-    FingerprintError error;
-
-    // The deviceId passed to the last callback.
-    uint64_t deviceId;
+    // The info passed to the last onAcquired() callback.
+    hidl_interface_2_2::FingerprintAcquiredInfo info;
 };
 
 // Test callback class for the BiometricsFingerprint HAL.
 // The HAL will call these callback methods to notify about completed operations
 // or encountered errors.
 class FingerprintCallback : public ::testing::VtsHalHidlTargetCallbackBase<FingerprintCallbackArgs>,
-                            public IBiometricsFingerprintClientCallback {
+                            public hidl_interface_2_2::IBiometricsFingerprintClientCallback {
   public:
     Return<void> onEnrollResult(uint64_t, uint32_t, uint32_t, uint32_t) override { return Void(); }
 
-    Return<void> onAcquired(uint64_t, FingerprintAcquiredInfo, int32_t) override { return Void(); }
+    Return<void> onAcquired(uint64_t, hidl_interface::FingerprintAcquiredInfo, int32_t) override {
+        return Void();
+    }
+
+    Return<void> onAcquired_2_2(uint64_t, hidl_interface_2_2::FingerprintAcquiredInfo info,
+                                int32_t) override {
+        FingerprintCallbackArgs args = {};
+        args.info = info;
+        NotifyFromCallback(kCallbackNameOnAcquired, args);
+        return Void();
+    }
 
     Return<void> onAuthenticated(uint64_t, uint32_t, uint32_t, const hidl_vec<uint8_t>&) override {
         return Void();
     }
 
-    Return<void> onError(uint64_t deviceId, FingerprintError error, int32_t) override {
-        FingerprintCallbackArgs args = {};
-        args.error = error;
-        args.deviceId = deviceId;
-        NotifyFromCallback(kCallbackNameOnError, args);
-        return Void();
-    }
+    Return<void> onError(uint64_t, FingerprintError, int32_t) override { return Void(); }
 
     Return<void> onRemoved(uint64_t, uint32_t, uint32_t, uint32_t) override { return Void(); }
 
@@ -121,41 +122,16 @@
     sp<FingerprintCallback> mCallback;
 };
 
-// Enroll with an invalid (all zeroes) HAT should fail.
-TEST_P(FingerprintHidlTest, EnrollZeroHatTest) {
-    // Filling HAT with zeros
-    hidl_vec<uint8_t> token(69);
-    for (size_t i = 0; i < 69; i++) {
-        token[i] = 0;
-    }
-
-    hidl_handle windowId = nullptr;
-    Return<RequestStatus> ret = mService->enroll_2_2(token, kGroupId, kTimeoutSec, windowId);
-    ASSERT_EQ(RequestStatus::SYS_OK, static_cast<RequestStatus>(ret));
-
-    // At least one call to onError should occur
-    auto res = mCallback->WaitForCallback(kCallbackNameOnError);
-    ASSERT_NE(FingerprintError::ERROR_NO_ERROR, res.args->error);
-}
-
-// Enroll with an invalid (null) HAT should fail.
-TEST_P(FingerprintHidlTest, EnrollGarbageHatTest) {
-    // Filling HAT with pseudorandom invalid data.
-    // Using default seed to make the test reproducible.
-    std::mt19937 gen(std::mt19937::default_seed);
-    std::uniform_int_distribution<uint8_t> dist;
-    hidl_vec<uint8_t> token(69);
-    for (size_t i = 0; i < 69; ++i) {
-        token[i] = dist(gen);
-    }
-
-    hidl_handle windowId = nullptr;
-    Return<RequestStatus> ret = mService->enroll_2_2(token, kGroupId, kTimeoutSec, windowId);
-    ASSERT_EQ(RequestStatus::SYS_OK, static_cast<RequestStatus>(ret));
-
-    // At least one call to onError should occur
-    auto res = mCallback->WaitForCallback(kCallbackNameOnError);
-    ASSERT_NE(FingerprintError::ERROR_NO_ERROR, res.args->error);
+// The START message and onAcquired_2_2 method should exist and work together correctly.
+// Note, this test doesn't use the HAL. It just makes sure that the newly added constant and
+// callback compile. Unfortunately, there is no way to test the usage of the constant within the
+// actual HAL.
+TEST_P(FingerprintHidlTest, acquiredInfoStartTest) {
+    mCallback->SetWaitTimeoutDefault(kTimeout);
+    mCallback->onAcquired_2_2(0 /* deviceId */, hidl_interface_2_2::FingerprintAcquiredInfo::START,
+                              0 /* vendorCode */);
+    auto res = mCallback->WaitForCallback(kCallbackNameOnAcquired);
+    ASSERT_EQ(hidl_interface_2_2::FingerprintAcquiredInfo::START, res.args->info);
 }
 
 }  // anonymous namespace
diff --git a/current.txt b/current.txt
index 79f5eba..9c0a776 100644
--- a/current.txt
+++ b/current.txt
@@ -631,7 +631,7 @@
 282193799d60bff27a84c65a36218c1e7d8f582f5828e2e059383d1b90aa56bd android.hardware.audio.effect@6.0::IVirtualizerEffect
 0868e00f7c5ee16723bda1a8f57099763d04100ae7126a1c2d3a9a87c844a7e8 android.hardware.audio.effect@6.0::IVisualizerEffect
 817930d58412d662cb45e641c50cb62c727e4a3e3ffe7029a53cad9677b97d58 android.hardware.audio.effect@6.0::types
-6828bbf18dc5d0f00c73341a10c8e4d574346c1abb1c2ed682ba5e9f8a3240d9 android.hardware.biometrics.fingerprint@2.2::IBiometricsFingerprint
+140f8f62100ccf9cd282ae3685a0f4ef0a9f971d77dfbc7350ccb4e04cf295ec android.hardware.biometrics.fingerprint@2.2::IBiometricsFingerprint
 82cad99f5feb2ea9bcd4579055edf4af8feb9fc602a6e4827ddd727d254d4991 android.hardware.biometrics.fingerprint@2.2::IBiometricsFingerprintClientCallback
 ae6315fd42196478ac08441cb489d854118001bca5b9b9fd58af5110952be30e android.hardware.biometrics.fingerprint@2.2::types
 362fd1c21641c2224f3b80c30d9797b988fa3f344243d531ba73c553779a5763 android.hardware.bluetooth@1.1::IBluetoothHci