dubai: Add sendFodEvent hooks to fingerprint wrapper

Co-authored-by: sb6596 <shubhamprince111@gmail.com>
Co-authored-by: AdarshGrewal <adarshgrewal@gmail.com>
Change-Id: I75d2f8c05533003ad3c2c3393e33c1ff6a7d34fc

fingerprint/Android.bp

@@ -17,6 +17,7 @@ cc_binary {
         "android.hardware.biometrics.fingerprint@2.1",
         "android.hardware.biometrics.fingerprint@2.2",
         "android.hardware.biometrics.fingerprint@2.3",
+        "com.motorola.hardware.biometric.fingerprint@1.0",
     ],
 }
 

fingerprint/BiometricsFingerprint.cpp

@@ -26,6 +26,11 @@
 #include <poll.h>
 #include <sys/stat.h>
 
+#define NOTIFY_FINGER_UP IMotFodEventType::FINGER_UP
+#define NOTIFY_FINGER_DOWN IMotFodEventType::FINGER_DOWN
+
+#define FOD_UI_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display-primary/fod_ui"
+
 namespace android {
 namespace hardware {
 namespace biometrics {
@@ -33,8 +38,52 @@ namespace fingerprint {
 namespace V2_3 {
 namespace implementation {
 
+static bool readBool(int fd) {
+    char c;
+    int rc;
+
+    rc = lseek(fd, 0, SEEK_SET);
+    if (rc) {
+        LOG(ERROR) << "failed to seek fd, err: " << rc;
+        return false;
+    }
+
+    rc = read(fd, &c, sizeof(char));
+    if (rc != 1) {
+        LOG(ERROR) << "failed to read bool from fd, err: " << rc;
+        return false;
+    }
+
+    return c != '0';
+}
+
 BiometricsFingerprint::BiometricsFingerprint() {
     biometrics_2_1_service = IBiometricsFingerprint_2_1::getService();
+    mMotoFingerprint = IMotoFingerPrint::getService();
+
+    std::thread([this]() {
+        int fd = open(FOD_UI_PATH, O_RDONLY);
+        if (fd < 0) {
+            LOG(ERROR) << "failed to open fd, err: " << fd;
+            return;
+        }
+
+        struct pollfd fodUiPoll = {
+            .fd = fd,
+            .events = POLLERR | POLLPRI,
+            .revents = 0,
+        };
+
+        while (true) {
+            int rc = poll(&fodUiPoll, 1, -1);
+            if (rc < 0) {
+                LOG(ERROR) << "failed to poll fd, err: " << rc;
+                continue;
+            }
+            mMotoFingerprint->sendFodEvent(readBool(fd) ? NOTIFY_FINGER_DOWN : NOTIFY_FINGER_UP , {},
+                [](IMotFodEventResult, const hidl_vec<signed char>&) {});
+        }
+    }).detach();
 }
 
 Return<uint64_t> BiometricsFingerprint::setNotify(const sp<IBiometricsFingerprintClientCallback>& clientCallback) {

fingerprint/BiometricsFingerprint.h

@@ -20,6 +20,7 @@
 #include <android/hardware/biometrics/fingerprint/2.3/IBiometricsFingerprint.h>
 #include <hidl/MQDescriptor.h>
 #include <hidl/Status.h>
+#include <com/motorola/hardware/biometric/fingerprint/1.0/IMotoFingerPrint.h>
 
 namespace android {
 namespace hardware {
@@ -38,6 +39,9 @@ using ::android::hardware::hidl_vec;
 using ::android::hardware::Return;
 using ::android::hardware::Void;
 using ::android::sp;
+using ::com::motorola::hardware::biometric::fingerprint::V1_0::IMotoFingerPrint;
+using ::com::motorola::hardware::biometric::fingerprint::V1_0::IMotFodEventType;
+using ::com::motorola::hardware::biometric::fingerprint::V1_0::IMotFodEventResult;
 
 struct BiometricsFingerprint : public IBiometricsFingerprint {
     BiometricsFingerprint();
@@ -60,6 +64,7 @@ struct BiometricsFingerprint : public IBiometricsFingerprint {
 
 private:
     sp<IBiometricsFingerprint_2_1> biometrics_2_1_service;
+    sp<IMotoFingerPrint> mMotoFingerprint;
 };
 
 }  // namespace implementation