aidl: fingerprint: allow to delay onPointerDown for screen off

Devices with optical Goodix UDFPS sensors fail with TOO_FAST during
screen off unlocking due to the screen not being on yet.

Defer onPointerDown only during screen off UDFPS unlocking by setting
`ro.vendor.fingerprint.screen_off_press_delay` property to the amount
of miliseconds that it should be delayed by.

Co-authored-by: Simon1511 <me@simon1511.de>
Change-Id: Idd5811723ba2d69579f35649fe395b71713c59f5

Author: xdevs23

aidl/fingerprint/Session.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2024 The LineageOS Project
+ * Copyright (C) 2024-2026 The LineageOS Project
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -243,14 +243,23 @@ ndk::ScopedAStatus Session::detectInteractionWithContext(
 }
 
 ndk::ScopedAStatus Session::onPointerDownWithContext(const PointerContext& context) {
+    int screenOffPressDelayMs = FingerprintHalProperties::screen_off_press_delay().value_or(0);
+
+    if (screenOffPressDelayMs > 0) {
+        if (context.isAod && mDisplayState == DisplayState::NO_UI) {
+            std::this_thread::sleep_for(std::chrono::milliseconds(screenOffPressDelayMs));
+        }
+    }
+
     return onPointerDown(context.pointerId, context.x, context.y, context.minor, context.major);
 }
 
 ndk::ScopedAStatus Session::onPointerUpWithContext(const PointerContext& context) {
     return onPointerUp(context.pointerId);
 }
 
-ndk::ScopedAStatus Session::onContextChanged(const OperationContext& /*context*/) {
+ndk::ScopedAStatus Session::onContextChanged(const OperationContext& context) {
+    mDisplayState = context.displayState;
     return ndk::ScopedAStatus::ok();
 }
 

aidl/fingerprint/Session.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2024 The LineageOS Project
+ * Copyright (C) 2024-2026 The LineageOS Project
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -16,6 +16,7 @@
 
 #define FINGERPRINT_DATA_DIR "/data/vendor/biometrics/fp/User_%d/"
 
+using ::aidl::android::hardware::biometrics::common::DisplayState;
 using ::aidl::android::hardware::biometrics::common::ICancellationSignal;
 using ::aidl::android::hardware::biometrics::common::OperationContext;
 using ::aidl::android::hardware::biometrics::fingerprint::PointerContext;
@@ -96,6 +97,8 @@ class Session : public BnSession {
 
     // Binder death handler.
     AIBinder_DeathRecipient* mDeathRecipient;
+
+    DisplayState mDisplayState;
 };
 
 }  // namespace fingerprint

aidl/fingerprint/fingerprint.sysprop

@@ -76,3 +76,12 @@ prop {
     access: Readonly
     api_name: "cancel_on_enroll_completion"
 }
+
+# amount of milliseconds by which onPointerDown will be delayed during screen off UDFPS (default: 0)
+prop {
+    prop_name: "ro.vendor.fingerprint.screen_off_press_delay"
+    type: Integer
+    scope: Internal
+    access: Readonly
+    api_name: "screen_off_press_delay"
+}