fingerprint: Setup dimming & fp press notifications

Change-Id: I0b1df953f11974daf1adb4b88d9b48efd229bcf1

hidl/fingerprint/Android.bp

@@ -18,4 +18,5 @@ cc_binary {
         "android.hardware.biometrics.fingerprint@2.3",
         "vendor.oplus.hardware.biometrics.fingerprint@2.1",
     ],
+    local_include_dirs: ["include"],
 }

hidl/fingerprint/BiometricsFingerprint.cpp

@@ -25,7 +25,8 @@ namespace fingerprint {
 namespace V2_3 {
 namespace implementation {
 
-BiometricsFingerprint::BiometricsFingerprint() {
+BiometricsFingerprint::BiometricsFingerprint()
+    : mOplusDisplayFd(open("/dev/oplus_display", O_RDWR)) {
     mOplusBiometricsFingerprint = IOplusBiometricsFingerprint::getService();
     mOplusBiometricsFingerprint->setHalCallback(this);
 }
@@ -37,6 +38,7 @@ Return<uint64_t> BiometricsFingerprint::setNotify(
 }
 
 Return<uint64_t> BiometricsFingerprint::preEnroll() {
+    setDimlayerHbm(1);
     return mOplusBiometricsFingerprint->preEnroll();
 }
 
@@ -46,6 +48,7 @@ Return<RequestStatus> BiometricsFingerprint::enroll(const hidl_array<uint8_t, 69
 }
 
 Return<RequestStatus> BiometricsFingerprint::postEnroll() {
+    setDimlayerHbm(0);
     return mOplusBiometricsFingerprint->postEnroll();
 }
 
@@ -54,6 +57,7 @@ Return<uint64_t> BiometricsFingerprint::getAuthenticatorId() {
 }
 
 Return<RequestStatus> BiometricsFingerprint::cancel() {
+    setDimlayerHbm(0);
     return mOplusBiometricsFingerprint->cancel();
 }
 
@@ -71,6 +75,7 @@ Return<RequestStatus> BiometricsFingerprint::setActiveGroup(uint32_t gid,
 }
 
 Return<RequestStatus> BiometricsFingerprint::authenticate(uint64_t operationId, uint32_t gid) {
+    setDimlayerHbm(1);
     return mOplusBiometricsFingerprint->authenticate(operationId, gid);
 }
 
@@ -79,10 +84,12 @@ Return<bool> BiometricsFingerprint::isUdfps(uint32_t sensorID) {
 }
 
 Return<void> BiometricsFingerprint::onFingerDown(uint32_t x, uint32_t y, float minor, float major) {
+    setFpPress(1);
     return mOplusBiometricsFingerprint->onFingerDown(x, y, minor, major);
 }
 
 Return<void> BiometricsFingerprint::onFingerUp() {
+    setFpPress(0);
     return mOplusBiometricsFingerprint->onFingerUp();
 }
 
@@ -100,6 +107,10 @@ Return<void> BiometricsFingerprint::onAcquired(uint64_t deviceId,
 Return<void> BiometricsFingerprint::onAuthenticated(uint64_t deviceId, uint32_t fingerId,
                                                     uint32_t groupId,
                                                     const hidl_vec<uint8_t>& token) {
+    if (fingerId != 0) {
+        setDimlayerHbm(0);
+    }
+    setFpPress(0);
     return mClientCallback->onAuthenticated(deviceId, fingerId, groupId, token);
 }
 

hidl/fingerprint/BiometricsFingerprint.h

@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <android-base/properties.h>
 #include <android/hardware/biometrics/fingerprint/2.1/types.h>
 #include <android/hardware/biometrics/fingerprint/2.2/IBiometricsFingerprintClientCallback.h>
 #include <android/hardware/biometrics/fingerprint/2.3/IBiometricsFingerprint.h>
@@ -24,6 +25,7 @@
 #include <hidl/Status.h>
 #include <log/log.h>
 
+#include <oplus/oplus_display_panel.h>
 #include <vendor/oplus/hardware/biometrics/fingerprint/2.1/IBiometricsFingerprint.h>
 
 namespace android {
@@ -34,6 +36,7 @@ namespace V2_3 {
 namespace implementation {
 
 using ::android::sp;
+using ::android::base::GetProperty;
 using ::android::hardware::hidl_string;
 using ::android::hardware::Return;
 using ::android::hardware::Void;
@@ -105,8 +108,24 @@ class BiometricsFingerprint : public IBiometricsFingerprint,
                                   uint32_t resultLen) override;
 
   private:
+    bool isUdfps() {
+        // We need to rely on `persist.vendor.fingerprint.sensor_type` here because we can't get our
+        // sensorId from anywhere.
+        return GetProperty("persist.vendor.fingerprint.sensor_type", "") == "optical";
+    }
+
+    bool setDimlayerHbm(unsigned int value) {
+        return isUdfps() && ioctl(mOplusDisplayFd, PANEL_IOCTL_SET_DIMLAYER_HBM, &value);
+    }
+
+    bool setFpPress(unsigned int value) {
+        return isUdfps() && ioctl(mOplusDisplayFd, PANEL_IOCTL_SET_FP_PRESS, &value);
+    }
+
     sp<IOplusBiometricsFingerprint> mOplusBiometricsFingerprint;
     sp<V2_1::IBiometricsFingerprintClientCallback> mClientCallback;
+
+    int mOplusDisplayFd;
 };
 
 }  // namespace implementation

hidl/fingerprint/include/oplus/oplus_display_panel.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2022 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <sys/ioctl.h>
+
+#define OPLUS_PANEL_IOCTL_BASE 'o'
+
+#define PANEL_IOCTL_SET_DIMLAYER_HBM _IOW(OPLUS_PANEL_IOCTL_BASE, 0x1F, unsigned int)
+#define PANEL_IOCTL_SET_FP_PRESS _IOW(OPLUS_PANEL_IOCTL_BASE, 0x29, unsigned int)