sm6150-common: fingerprint: Add thread listening for fod_ui sysfs event

Change-Id: I36f5789657daa70cf39fbdfe501392b9f96dbf2e

fingerprint/BiometricsFingerprint.cpp

@@ -18,6 +18,8 @@
 #define LOG_VERBOSE "android.hardware.biometrics.fingerprint@2.3-service.xiaomi_sm6150"
 
 #include <log/log.h>
+#include <poll.h>
+#include <thread>
 
 #include "BiometricsFingerprint.h"
 
@@ -33,6 +35,31 @@
 #define TOUCH_MAGIC 0x5400
 #define TOUCH_IOC_SETMODE TOUCH_MAGIC + 0
 
+#define FOD_UI_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display/fod_ui"
+
+#ifdef ENABLE_UDFPS
+namespace {
+static bool readBool(int fd) {
+    char c;
+    int rc;
+
+    rc = lseek(fd, 0, SEEK_SET);
+    if (rc) {
+        ALOGE("failed to seek fd, err: %d", rc);
+        return false;
+    }
+
+    rc = read(fd, &c, sizeof(char));
+    if (rc != 1) {
+        ALOGE("failed to read bool from fd, err: %d", rc);
+        return false;
+    }
+
+    return c != '0';
+}
+}  // anonymous namespace
+#endif
+
 namespace android {
 namespace hardware {
 namespace biometrics {
@@ -54,6 +81,30 @@ BiometricsFingerprint::BiometricsFingerprint() : mClientCallback(nullptr), mDevi
 
 #ifdef ENABLE_UDFPS
     touch_fd_ = android::base::unique_fd(open(TOUCH_DEV_PATH, O_RDWR));
+
+    std::thread([this]() {
+        int fd = open(FOD_UI_PATH, O_RDONLY);
+        if (fd < 0) {
+            ALOGE("failed to open fd, err: %d", fd);
+            return;
+        }
+
+        struct pollfd fodUiPoll = {
+                .fd = fd,
+                .events = POLLERR | POLLPRI,
+                .revents = 0,
+        };
+
+        while (true) {
+            int rc = poll(&fodUiPoll, 1, -1);
+            if (rc < 0) {
+                ALOGE("failed to poll fd, err: %d", rc);
+                continue;
+            }
+
+            mDevice->extCmd(mDevice, COMMAND_NIT, readBool(fd) ? PARAM_NIT_FOD : PARAM_NIT_NONE);
+        }
+    }).detach();
 #endif
 }
 
@@ -425,8 +476,6 @@ Return<void> BiometricsFingerprint::onFingerDown(uint32_t /* x */, uint32_t /* y
 #ifdef ENABLE_UDFPS
     int arg[2] = {Touch_Fod_Enable, FOD_STATUS_ON};
     ioctl(touch_fd_.get(), TOUCH_IOC_SETMODE, &arg);
-
-    mDevice->extCmd(mDevice, COMMAND_NIT, PARAM_NIT_FOD);
 #endif
 
     return Void();
@@ -444,8 +493,6 @@ Return<void> BiometricsFingerprint::onFingerUp() {
 #ifdef ENABLE_UDFPS
     int arg[2] = {Touch_Fod_Enable, FOD_STATUS_OFF};
     ioctl(touch_fd_.get(), TOUCH_IOC_SETMODE, &arg);
-
-    mDevice->extCmd(mDevice, COMMAND_NIT, PARAM_NIT_NONE);
 #endif
 
     return Void();

fingerprint/android.hardware.biometrics.fingerprint@2.3-service.xiaomi_sm6150-udfps.rc

@@ -1,3 +1,6 @@
+on boot
+    chown system system /sys/devices/platform/soc/soc:qcom,dsi-display/fod_ui
+
 service vendor.fps_hal /vendor/bin/hw/android.hardware.biometrics.fingerprint@2.3-service.xiaomi_sm6150-udfps
     # "class hal" causes a race condition on some devices due to files created
     # in /data. As a workaround, postpone startup until later in boot once

sepolicy/vendor/file_contexts

@@ -11,6 +11,7 @@
 /dev/xiaomi-touch                                                    u:object_r:touchfeature_device:s0
 /sys/devices/platform/soc/[a-f0-9]+.qcom,mdss_mdp/drm/card([0-3])+/card([0-3])+-DSI-1/panel_info u:object_r:vendor_sysfs_graphics:s0
 /sys/devices/platform/soc/soc:qcom,dsi-display/dc_enable             u:object_r:sysfs_anti_flicker:s0
+/sys/devices/platform/soc/soc:qcom,dsi-display/fod_ui                u:object_r:vendor_sysfs_fod:s0
 /sys/devices/platform/soc/soc:qcom,dsi-display/hbm                   u:object_r:sysfs_hbm:s0
 /sys/devices/platform/soc/soc:qcom,dsi-display/doze_mode             u:object_r:sysfs_doze:s0
 /sys/devices/platform/soc/soc:qcom,dsi-display/doze_status           u:object_r:sysfs_doze:s0

sepolicy/vendor/hal_fingerprint_default.te

@@ -1,6 +1,7 @@
 type hal_fingerprint_hwservice_xiaomi, hwservice_manager_type;
 type fingerprint_device, dev_type;
 type fingerprint_data_file, data_file_type, file_type;
+type vendor_sysfs_fod, sysfs_type, fs_type;
 type vendor_fp_prop, property_type;
 
 allow hal_fingerprint_default fingerprint_device:chr_file rw_file_perms;
@@ -12,6 +13,7 @@ allow hal_fingerprint_default tee_device:chr_file rw_file_perms;
 allow hal_fingerprint_default touchfeature_device:chr_file rw_file_perms;
 allow hal_fingerprint_default uhid_device:chr_file rw_file_perms;
 allow hal_fingerprint_default vendor_qdsp_device:chr_file r_file_perms;
+allow hal_fingerprint_default vendor_sysfs_fod:file rw_file_perms;
 allow hal_fingerprint_default vendor_sysfs_graphics:file rw_file_perms;
 allow hal_fingerprint_default vendor_xdsp_device:chr_file r_file_perms;