Change backlight_ops static

Change-Id: I8d958fc084a74e6272f470bf81a7f1a342c10492
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>

25 files changed, 494 insertions, 360 deletions

diff --git a/plugins/iot/display/core.c b/plugins/iot/display/core.c
index 0fe3a8ab..2ed514ce 100644
--- a/plugins/iot/display/core.c
+++ b/plugins/iot/display/core.c
@@ -94,7 +94,7 @@ extern int get_charging_status(int *val);
 extern void init_save_userlock(void);
 
 static struct display_plugin *disp_plgn;
-
+static struct _backlight_ops *backlight_ops;
 static void (*power_saving_func) (int onoff);
 static enum device_ops_status status = DEVICE_OPS_STATUS_UNINIT;
 
@@ -319,7 +319,7 @@ static gboolean late_transit_on(void *data)
 	g_source_remove(transit_timer);
 	transit_timer = 0;
 
-	backlight_ops.transit_state(DPMS_ON);
+	backlight_ops->transit_state(DPMS_ON);
 	return G_SOURCE_REMOVE;
 }
 
@@ -346,7 +346,7 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	_I("[lcdstep] 0x%lx", flags);
 
 	if (flags & AMBIENT_MODE) {
-		if (ambient_get_state() == false && backlight_ops.get_lcd_power() == DPMS_ON)
+		if (ambient_get_state() == false && backlight_ops->get_lcd_power() == DPMS_ON)
 			return;
 		ambient_set_state(false);
 	}
@@ -358,9 +358,9 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	if (!(flags & LCD_PHASED_TRANSIT_MODE)) {
 		/* Update brightness level */
 		if (state == LCD_DIM)
-			backlight_ops.dim();
+			backlight_ops->dim();
 		else if (state == LCD_NORMAL)
-			backlight_ops.update();
+			backlight_ops->update();
 	}
 
 	if (state == LCD_NORMAL)
@@ -445,7 +445,7 @@ inline void lcd_off_procedure(enum device_flags flag)
 	}
 
 	if (flags & LCD_PHASED_TRANSIT_MODE)
-		backlight_ops.transit_state(DPMS_OFF);
+		backlight_ops->transit_state(DPMS_OFF);
 
 	DD_LIST_FOREACH(lcdon_ops, l, ops)
 		ops->stop(flags);
@@ -717,7 +717,7 @@ void lcd_on_direct(enum device_flags flags)
 
 static inline bool check_lcd_is_on(void)
 {
-	if (backlight_ops.get_lcd_power() != DPMS_ON)
+	if (backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	return true;
@@ -790,7 +790,7 @@ int custom_lcdoff(enum device_flags flag)
 	}
 
 	_I("custom lcd off by flag(%d)", flag);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	if (set_custom_lcdon_timeout(0) == true)
@@ -878,7 +878,7 @@ int display_off_by_reason(const char *reason)
 	}
 
 	_I("platform lcd off by %s", reason);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	/* state transition */
@@ -928,7 +928,7 @@ static int default_proc_change_state(unsigned int cond, pid_t pid)
 		default_proc_change_state_action(next, -1);
 		break;
 	case S_LCDOFF:
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_EVENT);
 		if (set_custom_lcdon_timeout(0))
 			update_display_time();
@@ -1541,7 +1541,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			check_lock_screen();
 		else if (get_pm_old_state() == S_LCDDIM)
-			backlight_ops.update();
+			backlight_ops->update();
 
 		if (check_lcd_is_on() == false)
 			lcd_on_procedure(LCD_NORMAL, NORMAL_MODE);
@@ -1549,10 +1549,10 @@ static int default_action(int timeout)
 
 	case S_LCDDIM:
 		if ((get_pm_old_state() == S_NORMAL) &&
-		    backlight_ops.get_custom_status())
-			backlight_ops.save_custom_brightness();
+		    backlight_ops->get_custom_status())
+			backlight_ops->save_custom_brightness();
 		/* lcd dim state : dim the brightness */
-		backlight_ops.dim();
+		backlight_ops->dim();
 
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			lcd_on_procedure(LCD_DIM, NORMAL_MODE);
@@ -1562,11 +1562,11 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF)) {
 			stop_lock_timer();
 			/* lcd off state : turn off the backlight */
-			if (backlight_ops.get_lcd_power() == DPMS_ON)
+			if (backlight_ops->get_lcd_power() == DPMS_ON)
 				lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		}
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON
+		if (backlight_ops->get_lcd_power() == DPMS_ON
 		    || lcd_paneloff_mode)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		break;
@@ -1575,7 +1575,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF))
 			stop_lock_timer();
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 
 		if (!pm_get_power_lock_support()) {
@@ -1677,7 +1677,7 @@ static void default_saving_mode(int onoff)
 		clear_pm_status_flag(PWRSV_FLAG);
 
 	if (get_pm_cur_state() == S_NORMAL)
-		backlight_ops.update();
+		backlight_ops->update();
 }
 
 static int poll_callback(int condition, PMMsg *data)
@@ -1775,7 +1775,7 @@ static int update_setting(int key_idx, int val)
 			_I("Brightness changed in low battery,"
 				"escape dim state.");
 		}
-		backlight_ops.set_default_brt(val);
+		backlight_ops->set_default_brt(val);
 		break;
 	case SETTING_LOCK_SCREEN:
 		set_lock_screen_state(val);
@@ -1787,7 +1787,7 @@ static int update_setting(int key_idx, int val)
 		/* LCD on if lock screen show before waiting time */
 		if ((get_pm_cur_state() == S_NORMAL) &&
 		    val == VCONFKEY_IDLE_LOCK &&
-		    backlight_ops.get_lcd_power() != DPMS_ON &&
+		    backlight_ops->get_lcd_power() != DPMS_ON &&
 			is_lcdon_blocked() == LCDON_BLOCK_NONE)
 			lcd_on_procedure(LCD_NORMAL, LCD_ON_BY_EVENT);
 		stop_lock_timer();
@@ -1814,9 +1814,9 @@ static int update_setting(int key_idx, int val)
 		break;
 	case SETTING_POWER_CUSTOM_BRIGHTNESS:
 		if (val == VCONFKEY_PM_CUSTOM_BRIGHTNESS_ON)
-			backlight_ops.set_custom_status(true);
+			backlight_ops->set_custom_status(true);
 		else
-			backlight_ops.set_custom_status(false);
+			backlight_ops->set_custom_status(false);
 		break;
 
 	default:
@@ -1849,8 +1849,8 @@ static void check_seed_status(void)
 		tmp = brt;
 	}
 	_I("Set brightness(%d) from setting app.", tmp);
-	backlight_ops.set_default_brt(tmp);
-	backlight_ops.set_brightness(tmp);
+	backlight_ops->set_default_brt(tmp);
+	backlight_ops->set_brightness(tmp);
 
 	ret = vconf_get_int(VCONFKEY_SYSMAN_BATTERY_STATUS_LOW, &bat_state);
 	if (ret < 0) {
@@ -2063,8 +2063,8 @@ static int battery_health_changed(void *data)
 		set_pm_status_flag(DIMSTAY_FLAG);
 	}
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
-		backlight_ops.update();
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
+		backlight_ops->update();
 
 	return 0;
 }
@@ -2225,8 +2225,8 @@ static void esd_action(void)
 
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->stop(NORMAL_MODE);
-	backlight_ops.off(NORMAL_MODE);
-	backlight_ops.on(NORMAL_MODE);
+	backlight_ops->off(NORMAL_MODE);
+	backlight_ops->on(NORMAL_MODE);
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->start(NORMAL_MODE);
 }
@@ -2291,6 +2291,11 @@ static void display_init(void *data)
 			if (display_conf.timeout_enable)
 				get_lcd_timeout_from_settings();
 			ret = init_sysfs(flags);
+			backlight_ops = get_backlight_ops();
+			if (!backlight_ops) {
+				_E("Failed to get backlight operator.");
+				ret = -1;
+			}
 			break;
 		case INIT_POLL:
 			_I("input init");
@@ -2319,7 +2324,7 @@ static void display_init(void *data)
 		check_seed_status();
 
 		/* In smd test, TSP should be turned off if display panel is not existed. */
-		if (backlight_ops.get_lcd_power() == -ENOENT) {
+		if (backlight_ops->get_lcd_power() == -ENOENT) {
 			_I("Display panel is not existed.");
 			lcd_direct_control(DPMS_OFF, NORMAL_MODE);
 			exit_lcd_operation();
@@ -2440,10 +2445,10 @@ static int display_start(enum device_flags flags)
 	if (flags & NORMAL_MODE) {
 		if (flags & LCD_PANEL_OFF_MODE)
 			/* standby on */
-			backlight_ops.standby(true);
+			backlight_ops->standby(true);
 		else
 			/* normal lcd on */
-			backlight_ops.on(flags);
+			backlight_ops->on(flags);
 
 		return 0;
 	}
@@ -2467,7 +2472,7 @@ static int display_stop(enum device_flags flags)
 {
 	/* NORMAL MODE */
 	if (flags & NORMAL_MODE || flags & FORCE_OFF_MODE) {
-		backlight_ops.off(flags);
+		backlight_ops->off(flags);
 		return 0;
 	}
 
@@ -2507,6 +2512,10 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
 /**
  * @}
diff --git a/plugins/iot/display/device-interface.c b/plugins/iot/display/device-interface.c
index db92d760..49c9172a 100644
--- a/plugins/iot/display/device-interface.c
+++ b/plugins/iot/display/device-interface.c
@@ -44,6 +44,7 @@
 #include "device-node.h"
 #include "display/display-dpms.h"
 #include "display/display.h"
+#include "display/display-lock.h"
 
 #define TOUCH_ON	1
 #define TOUCH_OFF	0
@@ -67,8 +68,7 @@
 
 #define FREEZER_VITAL_WAKEUP_CGROUP "/sys/fs/cgroup/freezer/vital_wakeup/freezer.state"
 
-struct _backlight_ops backlight_ops;
-
+static struct _backlight_ops backlight_ops;
 static bool custom_status;
 static int custom_brightness;
 static int force_brightness;
@@ -77,6 +77,11 @@ static int dpms_running_state = DPMS_SETTING_DONE;
 static struct display_device *display_dev;
 static guint release_timer;
 
+inline struct _backlight_ops *get_backlight_ops(void)
+{
+	return &backlight_ops;
+}
+
 struct display_device *display_dev_get(void)
 {
 	return display_dev;
@@ -722,36 +727,35 @@ static void restore_brightness_func(void)
 	backlight_ops.transit_brt = change_brightness;
 }
 
-static void _init_ops(void)
-{
-	backlight_ops.off = backlight_off;
-	backlight_ops.dim = backlight_dim;
-	backlight_ops.on = backlight_on;
-	backlight_ops.update = backlight_update;
-	backlight_ops.standby = backlight_standby;
-	backlight_ops.set_default_brt = set_default_brt;
-	backlight_ops.get_default_brt = get_default_brt;
-	backlight_ops.get_lcd_power = get_lcd_power;
-	backlight_ops.set_custom_status = set_custom_status;
-	backlight_ops.get_custom_status = get_custom_status;
-	backlight_ops.save_custom_brightness = save_custom_brightness;
-	backlight_ops.custom_update = custom_backlight_update;
-	backlight_ops.set_force_brightness = set_force_brightness;
-	backlight_ops.set_brightness = set_brightness;
-	backlight_ops.get_brightness = get_brightness;
-	backlight_ops.restore_brightness_func = restore_brightness_func;
-	backlight_ops.get_brightness_by_light_sensor = get_brightness_by_light_sensor;
-	backlight_ops.get_image_effect = get_image_effect;
-	backlight_ops.set_image_effect = set_image_effect;
-	backlight_ops.get_panel_mode = get_panel_mode;
-	backlight_ops.set_panel_mode = set_panel_mode;
-	backlight_ops.get_frame_rate = get_frame_rate;
-	backlight_ops.set_frame_rate = set_frame_rate;
-	backlight_ops.transit_state = backlight_transit_state;
-	backlight_ops.transit_brt = change_brightness;
-	backlight_ops.blink = blink;
-	backlight_ops.release_blink = release_blink;
-}
+static struct _backlight_ops backlight_ops = {
+	.off = backlight_off,
+	.dim = backlight_dim,
+	.on = backlight_on,
+	.update = backlight_update,
+	.standby = backlight_standby,
+	.set_default_brt = set_default_brt,
+	.get_default_brt = get_default_brt,
+	.get_lcd_power = get_lcd_power,
+	.set_custom_status = set_custom_status,
+	.get_custom_status = get_custom_status,
+	.save_custom_brightness = save_custom_brightness,
+	.custom_update = custom_backlight_update,
+	.set_force_brightness = set_force_brightness,
+	.set_brightness = set_brightness,
+	.get_brightness = get_brightness,
+	.restore_brightness_func = restore_brightness_func,
+	.get_brightness_by_light_sensor = get_brightness_by_light_sensor,
+	.get_image_effect = get_image_effect,
+	.set_image_effect = set_image_effect,
+	.get_panel_mode = get_panel_mode,
+	.set_panel_mode = set_panel_mode,
+	.get_frame_rate = get_frame_rate,
+	.set_frame_rate = set_frame_rate,
+	.transit_state = backlight_transit_state,
+	.transit_brt = change_brightness,
+	.blink = blink,
+	.release_blink = release_blink,
+};
 
 int display_service_load(void)
 {
@@ -808,8 +812,6 @@ int is_lcdon_blocked(void)
 
 int init_sysfs(unsigned int flags)
 {
-	_init_ops();
-
 	register_notifier(DEVICE_NOTIFIER_VITAL_STATE, vital_state_changed);
 
 	return 0;
diff --git a/plugins/iot/display/key-filter.c b/plugins/iot/display/key-filter.c
index 186a1157..d8d4df35 100644
--- a/plugins/iot/display/key-filter.c
+++ b/plugins/iot/display/key-filter.c
@@ -91,6 +91,7 @@ enum combination_process {
 };
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static struct timeval pressed_time;
 static guint longkey_timeout_id = 0;
 static guint longkey_restore_id = 0;
@@ -113,8 +114,8 @@ static inline int current_state_in_on(void)
 static inline void restore_custom_brightness(void)
 {
 	if ((get_pm_cur_state() == S_LCDDIM) &&
-	    backlight_ops.get_custom_status())
-		backlight_ops.custom_update();
+	    backlight_ops->get_custom_status())
+		backlight_ops->custom_update();
 }
 
 static void pwroff_popup(void)
@@ -208,7 +209,7 @@ static inline bool switch_on_lcd(enum device_flags flags)
 	if (current_state_in_on())
 		return false;
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON) {
+	if (backlight_ops->get_lcd_power() == DPMS_ON) {
 		if (ambient_get_state() == false)
 			return false;
 	}
@@ -228,7 +229,7 @@ static inline void switch_off_lcd(void)
 	if (!current_state_in_on())
 		return;
 
-	if (backlight_ops.get_lcd_power() == DPMS_OFF)
+	if (backlight_ops->get_lcd_power() == DPMS_OFF)
 		return;
 
 	broadcast_lcdoff_by_powerkey();
@@ -355,7 +356,7 @@ static int decide_lcdoff(void)
 {
 	/* It's not needed if it's already LCD off state */
 	if (!current_state_in_on() &&
-	    backlight_ops.get_lcd_power() != DPMS_ON)
+	    backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	/*
@@ -797,4 +798,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/plugins/mobile/display/core.c b/plugins/mobile/display/core.c
index 80cef01c..e9cc44ca 100644
--- a/plugins/mobile/display/core.c
+++ b/plugins/mobile/display/core.c
@@ -96,6 +96,7 @@ extern int get_charging_status(int *val);
 extern void init_save_userlock(void);
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 
 static void (*power_saving_func) (int onoff);
 static enum device_ops_status status = DEVICE_OPS_STATUS_UNINIT;
@@ -326,7 +327,7 @@ static gboolean late_transit_on(void *data)
 	g_source_remove(transit_timer);
 	transit_timer = 0;
 
-	backlight_ops.transit_state(DPMS_ON);
+	backlight_ops->transit_state(DPMS_ON);
 	return G_SOURCE_REMOVE;
 }
 
@@ -353,7 +354,7 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	_I("[lcdstep] 0x%lx", flags);
 
 	if (flags & AMBIENT_MODE) {
-		if (ambient_get_state() == false && backlight_ops.get_lcd_power() == DPMS_ON)
+		if (ambient_get_state() == false && backlight_ops->get_lcd_power() == DPMS_ON)
 			return;
 		ambient_set_state(false);
 	}
@@ -365,9 +366,9 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	if (!(flags & LCD_PHASED_TRANSIT_MODE)) {
 		/* Update brightness level */
 		if (state == LCD_DIM)
-			backlight_ops.dim();
+			backlight_ops->dim();
 		else if (state == LCD_NORMAL)
-			backlight_ops.update();
+			backlight_ops->update();
 	}
 
 	if (state == LCD_NORMAL)
@@ -452,7 +453,7 @@ inline void lcd_off_procedure(enum device_flags flag)
 	}
 
 	if (flags & LCD_PHASED_TRANSIT_MODE)
-		backlight_ops.transit_state(DPMS_OFF);
+		backlight_ops->transit_state(DPMS_OFF);
 
 	DD_LIST_FOREACH(lcdon_ops, l, ops)
 		ops->stop(flags);
@@ -724,7 +725,7 @@ void lcd_on_direct(enum device_flags flags)
 
 static inline bool check_lcd_is_on(void)
 {
-	if (backlight_ops.get_lcd_power() != DPMS_ON)
+	if (backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	return true;
@@ -797,7 +798,7 @@ int custom_lcdoff(enum device_flags flag)
 	}
 
 	_I("custom lcd off by flag(%d)", flag);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	if (set_custom_lcdon_timeout(0) == true)
@@ -885,7 +886,7 @@ int display_off_by_reason(const char *reason)
 	}
 
 	_I("platform lcd off by %s", reason);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	/* state transition */
@@ -935,7 +936,7 @@ static int default_proc_change_state(unsigned int cond, pid_t pid)
 		default_proc_change_state_action(next, -1);
 		break;
 	case S_LCDOFF:
-		if (backlight_ops.get_lcd_power() == DPMS_ON) {
+		if (backlight_ops->get_lcd_power() == DPMS_ON) {
 			if (get_proximity_state() == SENSOR_PROXIMITY_NEAR)
 				lcd_off_procedure(LCD_OFF_BY_PROXIMITY);
 			else
@@ -1551,7 +1552,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			check_lock_screen();
 		else if (get_pm_old_state() == S_LCDDIM)
-			backlight_ops.update();
+			backlight_ops->update();
 
 		if (check_lcd_is_on() == false)
 			lcd_on_procedure(LCD_NORMAL, NORMAL_MODE);
@@ -1559,10 +1560,10 @@ static int default_action(int timeout)
 
 	case S_LCDDIM:
 		if ((get_pm_old_state() == S_NORMAL) &&
-		    backlight_ops.get_custom_status())
-			backlight_ops.save_custom_brightness();
+		    backlight_ops->get_custom_status())
+			backlight_ops->save_custom_brightness();
 		/* lcd dim state : dim the brightness */
-		backlight_ops.dim();
+		backlight_ops->dim();
 
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			lcd_on_procedure(LCD_DIM, NORMAL_MODE);
@@ -1572,11 +1573,11 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF)) {
 			stop_lock_timer();
 			/* lcd off state : turn off the backlight */
-			if (backlight_ops.get_lcd_power() == DPMS_ON)
+			if (backlight_ops->get_lcd_power() == DPMS_ON)
 				lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		}
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON
+		if (backlight_ops->get_lcd_power() == DPMS_ON
 		    || lcd_paneloff_mode)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		break;
@@ -1585,7 +1586,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF))
 			stop_lock_timer();
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 
 		if (!pm_get_power_lock_support()) {
@@ -1687,7 +1688,7 @@ static void default_saving_mode(int onoff)
 		clear_pm_status_flag(PWRSV_FLAG);
 
 	if (get_pm_cur_state() == S_NORMAL)
-		backlight_ops.update();
+		backlight_ops->update();
 }
 
 static int poll_callback(int condition, PMMsg *data)
@@ -1785,7 +1786,7 @@ static int update_setting(int key_idx, int val)
 			_I("Brightness changed in low battery,"
 				"escape dim state.");
 		}
-		backlight_ops.set_default_brt(val);
+		backlight_ops->set_default_brt(val);
 		break;
 	case SETTING_LOCK_SCREEN:
 		set_lock_screen_state(val);
@@ -1797,7 +1798,7 @@ static int update_setting(int key_idx, int val)
 		/* LCD on if lock screen show before waiting time */
 		if ((get_pm_cur_state() == S_NORMAL) &&
 		    val == VCONFKEY_IDLE_LOCK &&
-		    backlight_ops.get_lcd_power() != DPMS_ON &&
+		    backlight_ops->get_lcd_power() != DPMS_ON &&
 			is_lcdon_blocked() == LCDON_BLOCK_NONE)
 			lcd_on_procedure(LCD_NORMAL, LCD_ON_BY_EVENT);
 		stop_lock_timer();
@@ -1824,9 +1825,9 @@ static int update_setting(int key_idx, int val)
 		break;
 	case SETTING_POWER_CUSTOM_BRIGHTNESS:
 		if (val == VCONFKEY_PM_CUSTOM_BRIGHTNESS_ON)
-			backlight_ops.set_custom_status(true);
+			backlight_ops->set_custom_status(true);
 		else
-			backlight_ops.set_custom_status(false);
+			backlight_ops->set_custom_status(false);
 		break;
 
 	default:
@@ -1859,8 +1860,8 @@ static void check_seed_status(void)
 		tmp = brt;
 	}
 	_I("Set brightness(%d) from setting app.", tmp);
-	backlight_ops.set_default_brt(tmp);
-	backlight_ops.set_brightness(tmp);
+	backlight_ops->set_default_brt(tmp);
+	backlight_ops->set_brightness(tmp);
 
 	ret = vconf_get_int(VCONFKEY_SYSMAN_BATTERY_STATUS_LOW, &bat_state);
 	if (ret < 0) {
@@ -2073,8 +2074,8 @@ static int battery_health_changed(void *data)
 		set_pm_status_flag(DIMSTAY_FLAG);
 	}
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
-		backlight_ops.update();
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
+		backlight_ops->update();
 
 	return 0;
 }
@@ -2235,8 +2236,8 @@ static void esd_action(void)
 
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->stop(NORMAL_MODE);
-	backlight_ops.off(NORMAL_MODE);
-	backlight_ops.on(NORMAL_MODE);
+	backlight_ops->off(NORMAL_MODE);
+	backlight_ops->on(NORMAL_MODE);
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->start(NORMAL_MODE);
 }
@@ -2329,7 +2330,7 @@ static void display_init(void *data)
 		check_seed_status();
 
 		/* In smd test, TSP should be turned off if display panel is not existed. */
-		if (backlight_ops.get_lcd_power() == -ENOENT) {
+		if (backlight_ops->get_lcd_power() == -ENOENT) {
 			_I("Display panel is not existed.");
 			lcd_direct_control(DPMS_OFF, NORMAL_MODE);
 			exit_lcd_operation();
@@ -2453,10 +2454,10 @@ static int display_start(enum device_flags flags)
 	if (flags & NORMAL_MODE) {
 		if (flags & LCD_PANEL_OFF_MODE)
 			/* standby on */
-			backlight_ops.standby(true);
+			backlight_ops->standby(true);
 		else
 			/* normal lcd on */
-			backlight_ops.on(flags);
+			backlight_ops->on(flags);
 		FIND_DISPLAY(enhance_ops, "enhance");
 		if (enhance_ops && enhance_ops->func)
 			enhance_ops->func(RESTORE_ENHANCE_OUTDOOR, &on);
@@ -2482,7 +2483,7 @@ static int display_stop(enum device_flags flags)
 {
 	/* NORMAL MODE */
 	if (flags & NORMAL_MODE || flags & FORCE_OFF_MODE) {
-		backlight_ops.off(flags);
+		backlight_ops->off(flags);
 		return 0;
 	}
 
@@ -2522,6 +2523,10 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
 /**
  * @}
diff --git a/plugins/mobile/display/device-interface.c b/plugins/mobile/display/device-interface.c
index 8d53e2ef..054e181c 100644
--- a/plugins/mobile/display/device-interface.c
+++ b/plugins/mobile/display/device-interface.c
@@ -43,6 +43,7 @@
 #include "device-node.h"
 #include "display/display-dpms.h"
 #include "display/display.h"
+#include "display/display-lock.h"
 #include "power/boot.h"
 #include "power/power-control.h"
 
@@ -66,8 +67,7 @@
 #define PALM_STR			"palm"
 #define UNKNOWN_STR			"unknown"
 
-struct _backlight_ops backlight_ops;
-
+static struct _backlight_ops backlight_ops;
 static bool custom_status;
 static int custom_brightness;
 static int force_brightness;
@@ -76,6 +76,11 @@ static int dpms_running_state = DPMS_SETTING_DONE;
 static struct display_device *display_dev;
 static guint release_timer;
 
+inline struct _backlight_ops *get_backlight_ops(void)
+{
+	return &backlight_ops;
+}
+
 struct display_device *display_dev_get(void)
 {
 	return display_dev;
@@ -721,36 +726,35 @@ static void restore_brightness_func(void)
 	backlight_ops.transit_brt = change_brightness;
 }
 
-static void _init_ops(void)
-{
-	backlight_ops.off = backlight_off;
-	backlight_ops.dim = backlight_dim;
-	backlight_ops.on = backlight_on;
-	backlight_ops.update = backlight_update;
-	backlight_ops.standby = backlight_standby;
-	backlight_ops.set_default_brt = set_default_brt;
-	backlight_ops.get_default_brt = get_default_brt;
-	backlight_ops.get_lcd_power = get_lcd_power;
-	backlight_ops.set_custom_status = set_custom_status;
-	backlight_ops.get_custom_status = get_custom_status;
-	backlight_ops.save_custom_brightness = save_custom_brightness;
-	backlight_ops.custom_update = custom_backlight_update;
-	backlight_ops.set_force_brightness = set_force_brightness;
-	backlight_ops.set_brightness = set_brightness;
-	backlight_ops.get_brightness = get_brightness;
-	backlight_ops.restore_brightness_func = restore_brightness_func;
-	backlight_ops.get_brightness_by_light_sensor = get_brightness_by_light_sensor;
-	backlight_ops.get_image_effect = get_image_effect;
-	backlight_ops.set_image_effect = set_image_effect;
-	backlight_ops.get_panel_mode = get_panel_mode;
-	backlight_ops.set_panel_mode = set_panel_mode;
-	backlight_ops.get_frame_rate = get_frame_rate;
-	backlight_ops.set_frame_rate = set_frame_rate;
-	backlight_ops.transit_state = backlight_transit_state;
-	backlight_ops.transit_brt = change_brightness;
-	backlight_ops.blink = blink;
-	backlight_ops.release_blink = release_blink;
-}
+static struct _backlight_ops backlight_ops = {
+	.off = backlight_off,
+	.dim = backlight_dim,
+	.on = backlight_on,
+	.update = backlight_update,
+	.standby = backlight_standby,
+	.set_default_brt = set_default_brt,
+	.get_default_brt = get_default_brt,
+	.get_lcd_power = get_lcd_power,
+	.set_custom_status = set_custom_status,
+	.get_custom_status = get_custom_status,
+	.save_custom_brightness = save_custom_brightness,
+	.custom_update = custom_backlight_update,
+	.set_force_brightness = set_force_brightness,
+	.set_brightness = set_brightness,
+	.get_brightness = get_brightness,
+	.restore_brightness_func = restore_brightness_func,
+	.get_brightness_by_light_sensor = get_brightness_by_light_sensor,
+	.get_image_effect = get_image_effect,
+	.set_image_effect = set_image_effect,
+	.get_panel_mode = get_panel_mode,
+	.set_panel_mode = set_panel_mode,
+	.get_frame_rate = get_frame_rate,
+	.set_frame_rate = set_frame_rate,
+	.transit_state = backlight_transit_state,
+	.transit_brt = change_brightness,
+	.blink = blink,
+	.release_blink = release_blink,
+};
 
 int display_service_load(void)
 {
@@ -822,8 +826,6 @@ int is_lcdon_blocked(void)
 
 int init_sysfs(unsigned int flags)
 {
-	_init_ops();
-
 	register_notifier(DEVICE_NOTIFIER_VITAL_STATE, vital_state_changed);
 	register_notifier(DEVICE_NOTIFIER_BOOTING_DONE, booting_done);
 
diff --git a/plugins/mobile/display/key-filter.c b/plugins/mobile/display/key-filter.c
index bd939ff6..b5fdf710 100644
--- a/plugins/mobile/display/key-filter.c
+++ b/plugins/mobile/display/key-filter.c
@@ -91,6 +91,7 @@ enum combination_process {
 };
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static struct timeval pressed_time;
 static guint longkey_timeout_id = 0;
 static guint longkey_restore_id = 0;
@@ -113,8 +114,8 @@ static inline int current_state_in_on(void)
 static inline void restore_custom_brightness(void)
 {
 	if ((get_pm_cur_state() == S_LCDDIM) &&
-	    backlight_ops.get_custom_status())
-		backlight_ops.custom_update();
+	    backlight_ops->get_custom_status())
+		backlight_ops->custom_update();
 }
 
 static void longkey_pressed(void)
@@ -197,7 +198,7 @@ static inline bool switch_on_lcd(enum device_flags flags)
 	if (current_state_in_on())
 		return false;
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON) {
+	if (backlight_ops->get_lcd_power() == DPMS_ON) {
 		if (ambient_get_state() == false)
 			return false;
 	}
@@ -217,7 +218,7 @@ static inline void switch_off_lcd(void)
 	if (!current_state_in_on())
 		return;
 
-	if (backlight_ops.get_lcd_power() == DPMS_OFF)
+	if (backlight_ops->get_lcd_power() == DPMS_OFF)
 		return;
 
 	broadcast_lcdoff_by_powerkey();
@@ -344,7 +345,7 @@ static int decide_lcdoff(void)
 {
 	/* It's not needed if it's already LCD off state */
 	if (!current_state_in_on() &&
-	    backlight_ops.get_lcd_power() != DPMS_ON)
+	    backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	/*
@@ -407,7 +408,7 @@ static bool key_check_display_on(void)
 	if (current_state_in_on())
 		return false;
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON) {
+	if (backlight_ops->get_lcd_power() == DPMS_ON) {
 		_W("display power was on");
 		return false;
 	}
@@ -421,7 +422,7 @@ static gboolean display_on_cb(void *data)
 		return G_SOURCE_REMOVE;
 
 	displayon_by_powerkey_timeout_id = 0;
-	if (backlight_ops.get_lcd_power() != DPMS_ON ||
+	if (backlight_ops->get_lcd_power() != DPMS_ON ||
 	    current_state_in_on() == false) {
 		broadcast_lcdon_by_powerkey();
 		lcd_on_direct(LCD_ON_BY_POWER_KEY);
@@ -490,7 +491,7 @@ static int process_power_key(struct input_event *pinput)
 			ignore = true;
 
 			if (!displayon_by_powerkey_timeout_id &&
-				backlight_ops.get_lcd_power() != DPMS_ON &&
+				backlight_ops->get_lcd_power() != DPMS_ON &&
 				key_combination != COMBINATION_TORCH) {
 				displayon_by_powerkey_timeout_id = g_timeout_add(
 						100,
@@ -824,4 +825,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/plugins/tv/display/core.c b/plugins/tv/display/core.c
index f997dd14..fbf58d06 100644
--- a/plugins/tv/display/core.c
+++ b/plugins/tv/display/core.c
@@ -94,6 +94,7 @@ extern int get_charging_status(int *val);
 extern void init_save_userlock(void);
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 
 static void (*power_saving_func) (int onoff);
 static enum device_ops_status status = DEVICE_OPS_STATUS_UNINIT;
@@ -319,7 +320,7 @@ static gboolean late_transit_on(void *data)
 	g_source_remove(transit_timer);
 	transit_timer = 0;
 
-	backlight_ops.transit_state(DPMS_ON);
+	backlight_ops->transit_state(DPMS_ON);
 	return G_SOURCE_REMOVE;
 }
 
@@ -346,7 +347,7 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	_I("[lcdstep] 0x%lx", flags);
 
 	if (flags & AMBIENT_MODE) {
-		if (ambient_get_state() == false && backlight_ops.get_lcd_power() == DPMS_ON)
+		if (ambient_get_state() == false && backlight_ops->get_lcd_power() == DPMS_ON)
 			return;
 		ambient_set_state(false);
 	}
@@ -358,9 +359,9 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	if (!(flags & LCD_PHASED_TRANSIT_MODE)) {
 		/* Update brightness level */
 		if (state == LCD_DIM)
-			backlight_ops.dim();
+			backlight_ops->dim();
 		else if (state == LCD_NORMAL)
-			backlight_ops.update();
+			backlight_ops->update();
 	}
 
 	if (state == LCD_NORMAL)
@@ -445,7 +446,7 @@ inline void lcd_off_procedure(enum device_flags flag)
 	}
 
 	if (flags & LCD_PHASED_TRANSIT_MODE)
-		backlight_ops.transit_state(DPMS_OFF);
+		backlight_ops->transit_state(DPMS_OFF);
 
 	DD_LIST_FOREACH(lcdon_ops, l, ops)
 		ops->stop(flags);
@@ -717,7 +718,7 @@ void lcd_on_direct(enum device_flags flags)
 
 static inline bool check_lcd_is_on(void)
 {
-	if (backlight_ops.get_lcd_power() != DPMS_ON)
+	if (backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	return true;
@@ -790,7 +791,7 @@ int custom_lcdoff(enum device_flags flag)
 	}
 
 	_I("custom lcd off by flag(%d)", flag);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	if (set_custom_lcdon_timeout(0) == true)
@@ -878,7 +879,7 @@ int display_off_by_reason(const char *reason)
 	}
 
 	_I("platform lcd off by %s", reason);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	/* state transition */
@@ -928,7 +929,7 @@ static int default_proc_change_state(unsigned int cond, pid_t pid)
 		default_proc_change_state_action(next, -1);
 		break;
 	case S_LCDOFF:
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_EVENT);
 		if (set_custom_lcdon_timeout(0))
 			update_display_time();
@@ -1541,7 +1542,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			check_lock_screen();
 		else if (get_pm_old_state() == S_LCDDIM)
-			backlight_ops.update();
+			backlight_ops->update();
 
 		if (check_lcd_is_on() == false)
 			lcd_on_procedure(LCD_NORMAL, NORMAL_MODE);
@@ -1549,10 +1550,10 @@ static int default_action(int timeout)
 
 	case S_LCDDIM:
 		if ((get_pm_old_state() == S_NORMAL) &&
-		    backlight_ops.get_custom_status())
-			backlight_ops.save_custom_brightness();
+		    backlight_ops->get_custom_status())
+			backlight_ops->save_custom_brightness();
 		/* lcd dim state : dim the brightness */
-		backlight_ops.dim();
+		backlight_ops->dim();
 
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			lcd_on_procedure(LCD_DIM, NORMAL_MODE);
@@ -1562,11 +1563,11 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF)) {
 			stop_lock_timer();
 			/* lcd off state : turn off the backlight */
-			if (backlight_ops.get_lcd_power() == DPMS_ON)
+			if (backlight_ops->get_lcd_power() == DPMS_ON)
 				lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		}
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON
+		if (backlight_ops->get_lcd_power() == DPMS_ON
 		    || lcd_paneloff_mode)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		break;
@@ -1575,7 +1576,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF))
 			stop_lock_timer();
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 
 		if (!pm_get_power_lock_support()) {
@@ -1677,7 +1678,7 @@ static void default_saving_mode(int onoff)
 		clear_pm_status_flag(PWRSV_FLAG);
 
 	if (get_pm_cur_state() == S_NORMAL)
-		backlight_ops.update();
+		backlight_ops->update();
 }
 
 static int poll_callback(int condition, PMMsg *data)
@@ -1775,7 +1776,7 @@ static int update_setting(int key_idx, int val)
 			_I("Brightness changed in low battery,"
 				"escape dim state.");
 		}
-		backlight_ops.set_default_brt(val);
+		backlight_ops->set_default_brt(val);
 		break;
 	case SETTING_LOCK_SCREEN:
 		set_lock_screen_state(val);
@@ -1787,7 +1788,7 @@ static int update_setting(int key_idx, int val)
 		/* LCD on if lock screen show before waiting time */
 		if ((get_pm_cur_state() == S_NORMAL) &&
 		    val == VCONFKEY_IDLE_LOCK &&
-		    backlight_ops.get_lcd_power() != DPMS_ON &&
+		    backlight_ops->get_lcd_power() != DPMS_ON &&
 			is_lcdon_blocked() == LCDON_BLOCK_NONE)
 			lcd_on_procedure(LCD_NORMAL, LCD_ON_BY_EVENT);
 		stop_lock_timer();
@@ -1814,9 +1815,9 @@ static int update_setting(int key_idx, int val)
 		break;
 	case SETTING_POWER_CUSTOM_BRIGHTNESS:
 		if (val == VCONFKEY_PM_CUSTOM_BRIGHTNESS_ON)
-			backlight_ops.set_custom_status(true);
+			backlight_ops->set_custom_status(true);
 		else
-			backlight_ops.set_custom_status(false);
+			backlight_ops->set_custom_status(false);
 		break;
 
 	default:
@@ -1849,8 +1850,8 @@ static void check_seed_status(void)
 		tmp = brt;
 	}
 	_I("Set brightness(%d) from setting app.", tmp);
-	backlight_ops.set_default_brt(tmp);
-	backlight_ops.set_brightness(tmp);
+	backlight_ops->set_default_brt(tmp);
+	backlight_ops->set_brightness(tmp);
 
 	ret = vconf_get_int(VCONFKEY_SYSMAN_BATTERY_STATUS_LOW, &bat_state);
 	if (ret < 0) {
@@ -2063,8 +2064,8 @@ static int battery_health_changed(void *data)
 		set_pm_status_flag(DIMSTAY_FLAG);
 	}
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
-		backlight_ops.update();
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
+		backlight_ops->update();
 
 	return 0;
 }
@@ -2226,8 +2227,8 @@ static void esd_action(void)
 
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->stop(NORMAL_MODE);
-	backlight_ops.off(NORMAL_MODE);
-	backlight_ops.on(NORMAL_MODE);
+	backlight_ops->off(NORMAL_MODE);
+	backlight_ops->on(NORMAL_MODE);
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->start(NORMAL_MODE);
 }
@@ -2320,7 +2321,7 @@ static void display_init(void *data)
 		check_seed_status();
 
 		/* In smd test, TSP should be turned off if display panel is not existed. */
-		if (backlight_ops.get_lcd_power() == -ENOENT) {
+		if (backlight_ops->get_lcd_power() == -ENOENT) {
 			_I("Display panel is not existed.");
 			lcd_direct_control(DPMS_OFF, NORMAL_MODE);
 			exit_lcd_operation();
@@ -2441,10 +2442,10 @@ static int display_start(enum device_flags flags)
 	if (flags & NORMAL_MODE) {
 		if (flags & LCD_PANEL_OFF_MODE)
 			/* standby on */
-			backlight_ops.standby(true);
+			backlight_ops->standby(true);
 		else
 			/* normal lcd on */
-			backlight_ops.on(flags);
+			backlight_ops->on(flags);
 
 		return 0;
 	}
@@ -2468,7 +2469,7 @@ static int display_stop(enum device_flags flags)
 {
 	/* NORMAL MODE */
 	if (flags & NORMAL_MODE || flags & FORCE_OFF_MODE) {
-		backlight_ops.off(flags);
+		backlight_ops->off(flags);
 		return 0;
 	}
 
@@ -2508,6 +2509,10 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
 /**
  * @}
diff --git a/plugins/tv/display/device-interface.c b/plugins/tv/display/device-interface.c
index ebaf5693..28c4075e 100644
--- a/plugins/tv/display/device-interface.c
+++ b/plugins/tv/display/device-interface.c
@@ -44,6 +44,7 @@
 #include "display/display-dpms.h"
 #include "display/display.h"
 #include "power/power-control.h"
+#include "display/display-lock.h"
 
 #define TOUCH_ON	1
 #define TOUCH_OFF	0
@@ -67,8 +68,7 @@
 
 #define FREEZER_VITAL_WAKEUP_CGROUP "/sys/fs/cgroup/freezer/vital_wakeup/freezer.state"
 
-struct _backlight_ops backlight_ops;
-
+static struct _backlight_ops backlight_ops;
 static bool custom_status;
 static int custom_brightness;
 static int force_brightness;
@@ -77,6 +77,11 @@ static int dpms_running_state = DPMS_SETTING_DONE;
 static struct display_device *display_dev;
 static guint release_timer;
 
+inline struct _backlight_ops *get_backlight_ops(void)
+{
+	return &backlight_ops;
+}
+
 struct display_device *display_dev_get(void)
 {
 	return display_dev;
@@ -722,36 +727,35 @@ static void restore_brightness_func(void)
 	backlight_ops.transit_brt = change_brightness;
 }
 
-static void _init_ops(void)
-{
-	backlight_ops.off = backlight_off;
-	backlight_ops.dim = backlight_dim;
-	backlight_ops.on = backlight_on;
-	backlight_ops.update = backlight_update;
-	backlight_ops.standby = backlight_standby;
-	backlight_ops.set_default_brt = set_default_brt;
-	backlight_ops.get_default_brt = get_default_brt;
-	backlight_ops.get_lcd_power = get_lcd_power;
-	backlight_ops.set_custom_status = set_custom_status;
-	backlight_ops.get_custom_status = get_custom_status;
-	backlight_ops.save_custom_brightness = save_custom_brightness;
-	backlight_ops.custom_update = custom_backlight_update;
-	backlight_ops.set_force_brightness = set_force_brightness;
-	backlight_ops.set_brightness = set_brightness;
-	backlight_ops.get_brightness = get_brightness;
-	backlight_ops.restore_brightness_func = restore_brightness_func;
-	backlight_ops.get_brightness_by_light_sensor = get_brightness_by_light_sensor;
-	backlight_ops.get_image_effect = get_image_effect;
-	backlight_ops.set_image_effect = set_image_effect;
-	backlight_ops.get_panel_mode = get_panel_mode;
-	backlight_ops.set_panel_mode = set_panel_mode;
-	backlight_ops.get_frame_rate = get_frame_rate;
-	backlight_ops.set_frame_rate = set_frame_rate;
-	backlight_ops.transit_state = backlight_transit_state;
-	backlight_ops.transit_brt = change_brightness;
-	backlight_ops.blink = blink;
-	backlight_ops.release_blink = release_blink;
-}
+static struct _backlight_ops backlight_ops = {
+	.off = backlight_off,
+	.dim = backlight_dim,
+	.on = backlight_on,
+	.update = backlight_update,
+	.standby = backlight_standby,
+	.set_default_brt = set_default_brt,
+	.get_default_brt = get_default_brt,
+	.get_lcd_power = get_lcd_power,
+	.set_custom_status = set_custom_status,
+	.get_custom_status = get_custom_status,
+	.save_custom_brightness = save_custom_brightness,
+	.custom_update = custom_backlight_update,
+	.set_force_brightness = set_force_brightness,
+	.set_brightness = set_brightness,
+	.get_brightness = get_brightness,
+	.restore_brightness_func = restore_brightness_func,
+	.get_brightness_by_light_sensor = get_brightness_by_light_sensor,
+	.get_image_effect = get_image_effect,
+	.set_image_effect = set_image_effect,
+	.get_panel_mode = get_panel_mode,
+	.set_panel_mode = set_panel_mode,
+	.get_frame_rate = get_frame_rate,
+	.set_frame_rate = set_frame_rate,
+	.transit_state = backlight_transit_state,
+	.transit_brt = change_brightness,
+	.blink = blink,
+	.release_blink = release_blink,
+};
 
 int display_service_load(void)
 {
@@ -809,8 +813,6 @@ int is_lcdon_blocked(void)
 
 int init_sysfs(unsigned int flags)
 {
-	_init_ops();
-
 	register_notifier(DEVICE_NOTIFIER_VITAL_STATE, vital_state_changed);
 
 	return 0;
diff --git a/plugins/tv/display/key-filter.c b/plugins/tv/display/key-filter.c
index 3874dbaf..7abfd2fa 100644
--- a/plugins/tv/display/key-filter.c
+++ b/plugins/tv/display/key-filter.c
@@ -91,6 +91,7 @@ enum combination_process {
 };
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static struct timeval pressed_time;
 static guint longkey_timeout_id = 0;
 static guint longkey_restore_id = 0;
@@ -113,8 +114,8 @@ static inline int current_state_in_on(void)
 static inline void restore_custom_brightness(void)
 {
 	if ((get_pm_cur_state() == S_LCDDIM) &&
-	    backlight_ops.get_custom_status())
-		backlight_ops.custom_update();
+	    backlight_ops->get_custom_status())
+		backlight_ops->custom_update();
 }
 
 static void pwroff_popup(void)
@@ -208,7 +209,7 @@ static inline bool switch_on_lcd(enum device_flags flags)
 	if (current_state_in_on())
 		return false;
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON) {
+	if (backlight_ops->get_lcd_power() == DPMS_ON) {
 		if (ambient_get_state() == false)
 			return false;
 	}
@@ -228,7 +229,7 @@ static inline void switch_off_lcd(void)
 	if (!current_state_in_on())
 		return;
 
-	if (backlight_ops.get_lcd_power() == DPMS_OFF)
+	if (backlight_ops->get_lcd_power() == DPMS_OFF)
 		return;
 
 	broadcast_lcdoff_by_powerkey();
@@ -355,7 +356,7 @@ static int decide_lcdoff(void)
 {
 	/* It's not needed if it's already LCD off state */
 	if (!current_state_in_on() &&
-	    backlight_ops.get_lcd_power() != DPMS_ON)
+	    backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	/*
@@ -791,4 +792,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/plugins/tv/display/state-tv.c b/plugins/tv/display/state-tv.c
index f8f1df13..0a86fde4 100644
--- a/plugins/tv/display/state-tv.c
+++ b/plugins/tv/display/state-tv.c
@@ -43,6 +43,7 @@
 #define SIGNAL_EARLY_WAKEUP        "EarlyWakeUp"
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static guint standby_timer;
 
 static int change_state(pid_t pid, int type, enum state_t st)
@@ -178,7 +179,7 @@ static int lcdon_action(int timeout)
 
 	/* TODO: post resume */
 
-	backlight_ops.on(0);
+	backlight_ops->on(0);
 
 	return 0;
 }
@@ -246,7 +247,7 @@ static int lcdoff_action(int timeout)
 		(get_pm_old_state() == S_LCDOFF))
 		return 0;
 
-	backlight_ops.off(0);
+	backlight_ops->off(0);
 
 	return 0;
 }
@@ -313,7 +314,7 @@ static int standby_post(void *data)
 	if (ret < 0)
 		_E("Failed to send dbus signal(%s)", SIGNAL_CHANGE_STATE);
 
-	backlight_ops.off(0);
+	backlight_ops->off(0);
 
 	/* Set power */
 
@@ -347,7 +348,7 @@ static int standby_action(int timeout)
 		(get_pm_cur_state() != S_SLEEP))
 		set_setting_pmstate(get_pm_cur_state());
 
-	backlight_ops.off(0);
+	backlight_ops->off(0);
 
 	standby_timer = g_timeout_add_seconds(0,
 			standby_go_next_state, NULL);
@@ -574,4 +575,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/plugins/wearable/display/auto-brightness-sensorhub.c b/plugins/wearable/display/auto-brightness-sensorhub.c
index 502c86f2..c2e17730 100644
--- a/plugins/wearable/display/auto-brightness-sensorhub.c
+++ b/plugins/wearable/display/auto-brightness-sensorhub.c
@@ -37,12 +37,13 @@
 #define LOWBATCAPACITY 5
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static int auto_brightness_state = SETTING_BRIGHTNESS_AUTOMATIC_OFF;
 static bool lbm, hbm, hold_brt, lowdim;
 
 static void change_brightness_transit(int start, int end)
 {
-	backlight_ops.transit_brt(start, end,
+	backlight_ops->transit_brt(start, end,
 			display_conf.brightness_change_step);
 }
 
@@ -86,8 +87,8 @@ static void set_brightness_level(int level)
 		auto_brightness_control(BR_HBM_ON, BR_IMPLICIT);
 		break;
 	case SPECIFIC_MODE_OFF:
-		default_brightness = backlight_ops.get_default_brt();
-		backlight_ops.get_brightness(&current_brightness);
+		default_brightness = backlight_ops->get_default_brt();
+		backlight_ops->get_brightness(&current_brightness);
 
 		/* Disable HBM, LBM */
 		auto_brightness_control(BR_HBM_OFF, BR_IMPLICIT);
@@ -118,9 +119,9 @@ static void set_default_brightness(void)
 {
 	int default_brt;
 
-	default_brt = backlight_ops.get_default_brt();
-	backlight_ops.set_default_brt(default_brt);
-	backlight_ops.update();
+	default_brt = backlight_ops->get_default_brt();
+	backlight_ops->set_default_brt(default_brt);
+	backlight_ops->update();
 }
 
 static void set_automatic_state_cb(keynode_t *key_nodes, void *data)
@@ -179,8 +180,8 @@ int auto_brightness_control(enum brightness_request_e request, int set_brightnes
 	int current_brightness;
 	int ret;
 
-	default_brightness = backlight_ops.get_default_brt();
-	backlight_ops.get_brightness(&current_brightness);
+	default_brightness = backlight_ops->get_default_brt();
+	backlight_ops->get_brightness(&current_brightness);
 
 	if (request == BR_LBM_ON) {
 		if (!get_lbm_setting())
@@ -188,12 +189,12 @@ int auto_brightness_control(enum brightness_request_e request, int set_brightnes
 		if (!lbm && !hbm && !hold_brt && !lowdim) {
 			change_brightness_transit(default_brightness, lbm_down_brt(default_brightness));
 			lbm_set_state(true);
-			backlight_ops.set_brightness(default_brightness);
+			backlight_ops->set_brightness(default_brightness);
 			change_flag(&lbm, 1);
 		} else if (!lbm && !hbm && !hold_brt && lowdim) {
 			change_brightness_transit(current_brightness, lbm_down_brt(current_brightness));
 			lbm_set_state(true);
-			backlight_ops.set_brightness(current_brightness);
+			backlight_ops->set_brightness(current_brightness);
 			change_flag(&lbm, 1);
 		} else if (!lbm && !hbm && hold_brt) {
 			change_flag(&lbm, 1);
@@ -219,13 +220,13 @@ int auto_brightness_control(enum brightness_request_e request, int set_brightnes
 			lbm_set_state(false);
 			change_brightness_transit(lbm_down_brt(current_brightness), set_brightness);
 		} else {
-			backlight_ops.set_brightness(set_brightness);
+			backlight_ops->set_brightness(set_brightness);
 		}
 		change_flag(&hold_brt, 1);
 	} else if (request == BR_LOWDIM_ON) {
 		if (!lowdim) {
 			if (!hbm && !hold_brt && (get_pm_cur_state() == S_NORMAL))
-				backlight_ops.dim();
+				backlight_ops->dim();
 			change_flag(&lowdim, 1);
 		}
 	} else if (request == BR_LBM_OFF) {
@@ -239,9 +240,9 @@ int auto_brightness_control(enum brightness_request_e request, int set_brightnes
 
 			if (!lowdim) {
 				change_brightness_transit(lbm_down_brt(default_brightness), default_brightness);
-				backlight_ops.set_brightness(default_brightness);
+				backlight_ops->set_brightness(default_brightness);
 			} else {
-				backlight_ops.dim();
+				backlight_ops->dim();
 			}
 		} else if (lbm && hold_brt) {
 			change_flag(&lbm, 0);
@@ -264,25 +265,25 @@ int auto_brightness_control(enum brightness_request_e request, int set_brightnes
 				return 0;
 
 			if (!lowdim)
-				backlight_ops.set_brightness(default_brightness);
+				backlight_ops->set_brightness(default_brightness);
 			else
-				backlight_ops.dim();
+				backlight_ops->dim();
 		} else if (lbm && hold_brt) {
 			change_flag(&hold_brt, 0);
 			if (!lowdim) {
 				change_brightness_transit(current_brightness, lbm_down_brt(default_brightness));
 				lbm_set_state(true);
-				backlight_ops.set_brightness(default_brightness);
+				backlight_ops->set_brightness(default_brightness);
 			} else {
 				change_brightness_transit(current_brightness, lbm_down_brt(PM_DIM_BRIGHTNESS));
 				lbm_set_state(true);
-				backlight_ops.set_brightness(PM_DIM_BRIGHTNESS);
+				backlight_ops->set_brightness(PM_DIM_BRIGHTNESS);
 			}
 		}
 	} else if (request == BR_LOWDIM_OFF) {
 		if (lowdim) {
 			if (!hbm && !hold_brt && (get_pm_cur_state() == S_NORMAL))
-				backlight_ops.update();
+				backlight_ops->update();
 			change_flag(&lowdim, 0);
 		}
 	} else if (request == BR_SET_BRIGHTNESS) {
@@ -290,9 +291,9 @@ int auto_brightness_control(enum brightness_request_e request, int set_brightnes
 			lbm_set_state(true);
 		change_flag(&lowdim, 0);
 		change_flag(&hold_brt, 0);
-		backlight_ops.set_default_brt(set_brightness);
+		backlight_ops->set_default_brt(set_brightness);
 		if (!hbm) {
-			ret = backlight_ops.set_brightness(set_brightness);
+			ret = backlight_ops->set_brightness(set_brightness);
 			if (ret < 0) {
 				_E("Failed to set brightness to %d.", set_brightness);
 				return ret;
@@ -332,7 +333,7 @@ int auto_brightness_restore(void)
 		return 0;
 
 	/* update to the default brightness */
-	return backlight_ops.update();
+	return backlight_ops->update();
 }
 
 int prepare_level_handler(void)
@@ -371,4 +372,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/plugins/wearable/display/core.c b/plugins/wearable/display/core.c
index 60d1db2d..ab576e48 100644
--- a/plugins/wearable/display/core.c
+++ b/plugins/wearable/display/core.c
@@ -101,6 +101,7 @@ extern int get_charging_status(int *val);
 extern void init_save_userlock(void);
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 
 static void (*power_saving_func) (int onoff);
 static enum device_ops_status status = DEVICE_OPS_STATUS_UNINIT;
@@ -336,7 +337,7 @@ static gboolean late_transit_on(void *data)
 	g_source_remove(transit_timer);
 	transit_timer = 0;
 
-	backlight_ops.transit_state(DPMS_ON);
+	backlight_ops->transit_state(DPMS_ON);
 	return G_SOURCE_REMOVE;
 }
 
@@ -372,7 +373,7 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	_I("[lcdstep] 0x%lx", flags);
 
 	if (flags & AMBIENT_MODE) {
-		if (ambient_get_state() == false && backlight_ops.get_lcd_power() == DPMS_ON)
+		if (ambient_get_state() == false && backlight_ops->get_lcd_power() == DPMS_ON)
 			return;
 		ambient_set_state(false);
 	}
@@ -384,9 +385,9 @@ void lcd_on_procedure(int state, enum device_flags flag)
 	if (!(flags & LCD_PHASED_TRANSIT_MODE)) {
 		/* Update brightness level */
 		if (state == LCD_DIM)
-			backlight_ops.dim();
+			backlight_ops->dim();
 		else if (state == LCD_NORMAL)
-			backlight_ops.update();
+			backlight_ops->update();
 	}
 
 	if (state == LCD_NORMAL)
@@ -471,7 +472,7 @@ inline void lcd_off_procedure(enum device_flags flag)
 	}
 
 	if (flags & LCD_PHASED_TRANSIT_MODE)
-		backlight_ops.transit_state(DPMS_OFF);
+		backlight_ops->transit_state(DPMS_OFF);
 
 	DD_LIST_FOREACH(lcdon_ops, l, ops)
 		ops->stop(flags);
@@ -751,7 +752,7 @@ void lcd_on_direct(enum device_flags flags)
 
 static inline bool check_lcd_is_on(void)
 {
-	if (backlight_ops.get_lcd_power() != DPMS_ON)
+	if (backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	return true;
@@ -852,7 +853,7 @@ int custom_lcdoff(enum device_flags flag)
 	}
 
 	_I("custom lcd off by flag(%d)", flag);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	if (set_custom_lcdon_timeout(0) == true)
@@ -945,7 +946,7 @@ int display_off_by_reason(const char *reason)
 	}
 
 	_I("platform lcd off by %s", reason);
-	if (backlight_ops.get_lcd_power() == DPMS_ON)
+	if (backlight_ops->get_lcd_power() == DPMS_ON)
 		lcd_off_procedure(flag);
 
 	/* state transition */
@@ -995,7 +996,7 @@ static int default_proc_change_state(unsigned int cond, pid_t pid)
 		default_proc_change_state_action(next, -1);
 		break;
 	case S_LCDOFF:
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_EVENT);
 		if (set_custom_lcdon_timeout(0))
 			update_display_time();
@@ -1628,7 +1629,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			check_lock_screen();
 		else if (get_pm_old_state() == S_LCDDIM)
-			backlight_ops.update();
+			backlight_ops->update();
 
 		if (check_lcd_is_on() == false)
 			lcd_on_procedure(LCD_NORMAL, NORMAL_MODE);
@@ -1636,10 +1637,10 @@ static int default_action(int timeout)
 
 	case S_LCDDIM:
 		if ((get_pm_old_state() == S_NORMAL) &&
-		    backlight_ops.get_custom_status())
-			backlight_ops.save_custom_brightness();
+		    backlight_ops->get_custom_status())
+			backlight_ops->save_custom_brightness();
 		/* lcd dim state : dim the brightness */
-		backlight_ops.dim();
+		backlight_ops->dim();
 
 		if ((get_pm_old_state() == S_LCDOFF) || (get_pm_old_state() == S_SLEEP))
 			lcd_on_procedure(LCD_DIM, NORMAL_MODE);
@@ -1649,11 +1650,11 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF)) {
 			stop_lock_timer();
 			/* lcd off state : turn off the backlight */
-			if (backlight_ops.get_lcd_power() == DPMS_ON)
+			if (backlight_ops->get_lcd_power() == DPMS_ON)
 				lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		}
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON
+		if (backlight_ops->get_lcd_power() == DPMS_ON
 		    || lcd_paneloff_mode)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 		break;
@@ -1662,7 +1663,7 @@ static int default_action(int timeout)
 		if ((get_pm_old_state() != S_SLEEP) && (get_pm_old_state() != S_LCDOFF))
 			stop_lock_timer();
 
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			lcd_off_procedure(LCD_OFF_BY_TIMEOUT);
 
 		if (!pm_get_power_lock_support()) {
@@ -1862,7 +1863,7 @@ static int update_setting(int key_idx, int val)
 			_I("Brightness changed in low battery,"
 				"escape dim state.");
 		}
-		backlight_ops.set_default_brt(val);
+		backlight_ops->set_default_brt(val);
 		break;
 	case SETTING_LOCK_SCREEN:
 		set_lock_screen_state(val);
@@ -1874,7 +1875,7 @@ static int update_setting(int key_idx, int val)
 		/* LCD on if lock screen show before waiting time */
 		if ((get_pm_cur_state() == S_NORMAL) &&
 		    val == VCONFKEY_IDLE_LOCK &&
-		    backlight_ops.get_lcd_power() != DPMS_ON &&
+		    backlight_ops->get_lcd_power() != DPMS_ON &&
 			is_lcdon_blocked() == LCDON_BLOCK_NONE)
 			lcd_on_procedure(LCD_NORMAL, LCD_ON_BY_EVENT);
 		stop_lock_timer();
@@ -1901,9 +1902,9 @@ static int update_setting(int key_idx, int val)
 		break;
 	case SETTING_POWER_CUSTOM_BRIGHTNESS:
 		if (val == VCONFKEY_PM_CUSTOM_BRIGHTNESS_ON)
-			backlight_ops.set_custom_status(true);
+			backlight_ops->set_custom_status(true);
 		else
-			backlight_ops.set_custom_status(false);
+			backlight_ops->set_custom_status(false);
 		break;
 
 	default:
@@ -1936,8 +1937,8 @@ static void check_seed_status(void)
 		tmp = brt;
 	}
 	_I("Set brightness(%d) from setting app.", tmp);
-	backlight_ops.set_default_brt(tmp);
-	backlight_ops.set_brightness(tmp);
+	backlight_ops->set_default_brt(tmp);
+	backlight_ops->set_brightness(tmp);
 
 	ret = vconf_get_int(VCONFKEY_SYSMAN_BATTERY_STATUS_LOW, &bat_state);
 	if (ret < 0) {
@@ -2149,13 +2150,13 @@ static int battery_health_changed(void *data)
 	if (health == HEALTH_GOOD) {
 		clear_pm_status_flag(BATTERY_FLAG);
 		clear_pm_status_flag(DIMSTAY_FLAG);
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			auto_brightness_restore();
 	} else if (health == HEALTH_LOW || health == HEALTH_HIGH || health == HEALTH_OVP) {
 		set_pm_status_flag(BATTERY_FLAG);
 		set_pm_status_flag(DIMSTAY_FLAG);
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
-			backlight_ops.update();
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
+			backlight_ops->update();
 	}
 
 	return 0;
@@ -2317,8 +2318,8 @@ static void esd_action(void)
 
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->stop(NORMAL_MODE);
-	backlight_ops.off(NORMAL_MODE);
-	backlight_ops.on(NORMAL_MODE);
+	backlight_ops->off(NORMAL_MODE);
+	backlight_ops->on(NORMAL_MODE);
 	if (!check_default(touchscreen_ops))
 		touchscreen_ops->start(NORMAL_MODE);
 }
@@ -2443,7 +2444,7 @@ static void display_init(void *data)
 		check_seed_status();
 
 		/* In smd test, TSP should be turned off if display panel is not existed. */
-		if (backlight_ops.get_lcd_power() == -ENOENT) {
+		if (backlight_ops->get_lcd_power() == -ENOENT) {
 			_I("Display panel is not existed.");
 			lcd_direct_control(DPMS_OFF, NORMAL_MODE);
 			exit_lcd_operation();
@@ -2567,10 +2568,10 @@ static int display_start(enum device_flags flags)
 	if (flags & NORMAL_MODE) {
 		if (flags & LCD_PANEL_OFF_MODE)
 			/* standby on */
-			backlight_ops.standby(true);
+			backlight_ops->standby(true);
 		else
 			/* normal lcd on */
-			backlight_ops.on(flags);
+			backlight_ops->on(flags);
 		FIND_DISPLAY(enhance_ops, "enhance");
 		if (enhance_ops && enhance_ops->func)
 			enhance_ops->func(RESTORE_ENHANCE_OUTDOOR, &on);
@@ -2596,7 +2597,7 @@ static int display_stop(enum device_flags flags)
 {
 	/* NORMAL MODE */
 	if (flags & NORMAL_MODE || flags & FORCE_OFF_MODE) {
-		backlight_ops.off(flags);
+		backlight_ops->off(flags);
 		return 0;
 	}
 
@@ -2636,7 +2637,12 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
+
 /**
  * @}
  */
diff --git a/plugins/wearable/display/device-interface.c b/plugins/wearable/display/device-interface.c
index 224ba653..c26937e7 100644
--- a/plugins/wearable/display/device-interface.c
+++ b/plugins/wearable/display/device-interface.c
@@ -43,6 +43,7 @@
 #include "device-node.h"
 #include "display/display-dpms.h"
 #include "display/display.h"
+#include "display/display-lock.h"
 #include "battery-monitor.h"
 #include "battery/power-supply.h"
 #include "power/power-control.h"
@@ -70,8 +71,8 @@
 
 #define FREEZER_VITAL_WAKEUP_CGROUP "/sys/fs/cgroup/freezer/vital_wakeup/freezer.state"
 
-struct _backlight_ops backlight_ops;
 
+static struct _backlight_ops backlight_ops;
 static bool custom_status;
 static int custom_brightness;
 static int force_brightness;
@@ -84,6 +85,11 @@ static int aod_normal_level = -1;
 static int aod_min_level = -1;
 static int aod_charging_level = -1;
 
+inline struct _backlight_ops *get_backlight_ops(void)
+{
+	return &backlight_ops;
+}
+
 struct display_device *display_dev_get(void)
 {
 	return display_dev;
@@ -782,39 +788,37 @@ static void restore_brightness_func(void)
 	backlight_ops.transit_brt = change_brightness;
 }
 
-static void _init_ops(void)
-{
-	backlight_ops.off = backlight_off;
-	backlight_ops.dim = backlight_dim;
-	backlight_ops.on = backlight_on;
-	backlight_ops.update = backlight_update;
-	backlight_ops.standby = backlight_standby;
-	backlight_ops.set_default_brt = set_default_brt;
-	backlight_ops.get_default_brt = get_default_brt;
-	backlight_ops.get_lcd_power = get_lcd_power;
-	backlight_ops.set_custom_status = set_custom_status;
-	backlight_ops.get_custom_status = get_custom_status;
-	backlight_ops.save_custom_brightness = save_custom_brightness;
-	backlight_ops.custom_update = custom_backlight_update;
-	backlight_ops.set_force_brightness = set_force_brightness;
-	backlight_ops.set_brightness = set_brightness;
-	backlight_ops.get_brightness = get_brightness;
-	backlight_ops.restore_brightness_func = restore_brightness_func;
-	backlight_ops.get_brightness_by_light_sensor = get_brightness_by_light_sensor;
-	backlight_ops.get_image_effect = get_image_effect;
-	backlight_ops.set_image_effect = set_image_effect;
-	backlight_ops.get_panel_mode = get_panel_mode;
-	backlight_ops.set_panel_mode = set_panel_mode;
-	backlight_ops.get_frame_rate = get_frame_rate;
-	backlight_ops.set_frame_rate = set_frame_rate;
-	backlight_ops.transit_state = backlight_transit_state;
-	backlight_ops.transit_brt = change_brightness;
-	backlight_ops.blink = blink;
-	backlight_ops.release_blink = release_blink;
-
+static struct _backlight_ops backlight_ops = {
+	.off = backlight_off,
+	.dim = backlight_dim,
+	.on = backlight_on,
+	.update = backlight_update,
+	.standby = backlight_standby,
+	.set_default_brt = set_default_brt,
+	.get_default_brt = get_default_brt,
+	.get_lcd_power = get_lcd_power,
+	.set_custom_status = set_custom_status,
+	.get_custom_status = get_custom_status,
+	.save_custom_brightness = save_custom_brightness,
+	.custom_update = custom_backlight_update,
+	.set_force_brightness = set_force_brightness,
+	.set_brightness = set_brightness,
+	.get_brightness = get_brightness,
+	.restore_brightness_func = restore_brightness_func,
+	.get_brightness_by_light_sensor = get_brightness_by_light_sensor,
+	.get_image_effect = get_image_effect,
+	.set_image_effect = set_image_effect,
+	.get_panel_mode = get_panel_mode,
+	.set_panel_mode = set_panel_mode,
+	.get_frame_rate = get_frame_rate,
+	.set_frame_rate = set_frame_rate,
+	.transit_state = backlight_transit_state,
+	.transit_brt = change_brightness,
+	.blink = blink,
+	.release_blink = release_blink,
 	/* auto-test only function */
-	backlight_ops.get_brightness_raw = get_brightness; /* always fetch brightness from node even LBM mode */
-}
+	.get_brightness_raw = get_brightness, /* always fetch brightness from node even LBM mode */
+};
 
 int display_service_load(void)
 {
@@ -882,8 +886,6 @@ int is_lcdon_blocked(void)
 
 int init_sysfs(unsigned int flags)
 {
-	_init_ops();
-
 	register_notifier(DEVICE_NOTIFIER_VITAL_STATE, vital_state_changed);
 
 	return 0;
diff --git a/plugins/wearable/display/display-handler.c b/plugins/wearable/display/display-handler.c
index ddb25cdc..1c2f778d 100644
--- a/plugins/wearable/display/display-handler.c
+++ b/plugins/wearable/display/display-handler.c
@@ -43,6 +43,7 @@ enum charging_lcd_state {
 	CHARGING_LCD_ON = 1,
 };
 
+static struct _backlight_ops *backlight_ops;
 static guint autobrt_timer;
 static int autobrtlevel;
 
@@ -55,10 +56,10 @@ static gboolean lcdon_from_aod_cb(gpointer data)
 	autobrt_timer = 0;
 
 	/* If it is still not turned on, do not apply auto brightness */
-	if (backlight_ops.get_lcd_power() != DPMS_ON)
+	if (backlight_ops->get_lcd_power() != DPMS_ON)
 		return G_SOURCE_REMOVE;
 
-	backlight_ops.transit_state(DPMS_ON);
+	backlight_ops->transit_state(DPMS_ON);
 	display_info.set_brightness_level(level);
 
 	/* lcdon is completed, aod disappered */
@@ -141,7 +142,7 @@ static void aod_change_signal(GDBusConnection  *conn,
 		if (!aod_clock_displayed)
 			return;
 
-		backlight_ops.transit_state(DPMS_ON);
+		backlight_ops->transit_state(DPMS_ON);
 		if (autobrt_timer) { /* if there is reserved level, apply it */
 			g_source_remove(autobrt_timer);
 			autobrt_timer = 0;
@@ -220,3 +221,10 @@ static const struct display_ops display_handler_ops = {
 };
 
 DISPLAY_OPS_REGISTER(&display_handler_ops)
+
+static void __CONSTRUCTOR__ initialize(void)
+{
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
+}
diff --git a/plugins/wearable/display/enhance.c b/plugins/wearable/display/enhance.c
index 1675d7b1..9fb32ea3 100644
--- a/plugins/wearable/display/enhance.c
+++ b/plugins/wearable/display/enhance.c
@@ -34,6 +34,7 @@
 #define VCONF_HIGH_CONTRAST		VCONFKEY_SETAPPL_ACCESSIBILITY_HIGH_CONTRAST
 #define VCONF_GREYSCALE			VCONFKEY_SETAPPL_ACCESSIBILITY_GREYSCALE
 
+static struct _backlight_ops *backlight_ops;
 static bool negative_status;
 static bool greyscale_status;
 static bool greysacle_setting;
@@ -54,7 +55,7 @@ static int enhance_update_state(void)
 	else
 		state = DISPLAY_IMAGE_EFFECT_STANDARD;
 
-	backlight_ops.set_image_effect(state);
+	backlight_ops->set_image_effect(state);
 
 	return state;
 }
@@ -165,3 +166,10 @@ static const struct display_ops display_enhance_ops = {
 };
 
 DISPLAY_OPS_REGISTER(&display_enhance_ops)
+
+static void __CONSTRUCTOR__ initialize(void)
+{
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
+}
diff --git a/plugins/wearable/display/key-filter.c b/plugins/wearable/display/key-filter.c
index b543a8ac..26ecf116 100644
--- a/plugins/wearable/display/key-filter.c
+++ b/plugins/wearable/display/key-filter.c
@@ -91,6 +91,7 @@ enum combination_process {
 };
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static struct timeval pressed_time;
 static guint longkey_timeout_id = 0;
 static guint longkey_restore_id = 0;
@@ -113,8 +114,8 @@ static inline int current_state_in_on(void)
 static inline void restore_custom_brightness(void)
 {
 	if ((get_pm_cur_state() == S_LCDDIM) &&
-	    backlight_ops.get_custom_status())
-		backlight_ops.custom_update();
+	    backlight_ops->get_custom_status())
+		backlight_ops->custom_update();
 }
 
 static void longkey_pressed(void)
@@ -205,7 +206,7 @@ static inline bool switch_on_lcd(enum device_flags flags)
 	if (current_state_in_on())
 		return false;
 
-	if (backlight_ops.get_lcd_power() == DPMS_ON) {
+	if (backlight_ops->get_lcd_power() == DPMS_ON) {
 		if (ambient_get_state() == false)
 			return false;
 	}
@@ -225,7 +226,7 @@ static inline void switch_off_lcd(void)
 	if (!current_state_in_on())
 		return;
 
-	if (backlight_ops.get_lcd_power() == DPMS_OFF)
+	if (backlight_ops->get_lcd_power() == DPMS_OFF)
 		return;
 
 	broadcast_lcdoff_by_powerkey();
@@ -352,7 +353,7 @@ static int decide_lcdoff(void)
 {
 	/* It's not needed if it's already LCD off state */
 	if (!current_state_in_on() &&
-	    backlight_ops.get_lcd_power() != DPMS_ON)
+	    backlight_ops->get_lcd_power() != DPMS_ON)
 		return false;
 
 	/*
@@ -771,4 +772,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/plugins/wearable/display/lbm.c b/plugins/wearable/display/lbm.c
index 41a5bb29..79ec7cd0 100644
--- a/plugins/wearable/display/lbm.c
+++ b/plugins/wearable/display/lbm.c
@@ -46,6 +46,7 @@ static struct lbm_config lbm_conf = {
 	.aod_brightness_level = 0,
 };
 
+static struct _backlight_ops *backlight_ops;
 static int lbm_setting_mode;
 static int system_brightness;
 static struct display_device *display_dev;
@@ -138,7 +139,7 @@ static void lbm_change_brightness(int start, int end, int step)
 	if (display_dimstay_check())
 		return;
 
-	ret = backlight_ops.get_brightness(&prev);
+	ret = backlight_ops->get_brightness(&prev);
 
 	if (ret < 0) {
 		_E("Failed to get brightness, %d.", ret);
@@ -160,7 +161,7 @@ static void lbm_change_brightness(int start, int end, int step)
 		if (ret < 0)
 			_E("Failed to set_multi_brightness, %d.", ret);
 
-		backlight_ops.set_brightness(end);
+		backlight_ops->set_brightness(end);
 
 		return;
 	}
@@ -182,7 +183,7 @@ static void lbm_change_brightness(int start, int end, int step)
 			start = end;
 
 		usleep(LCD_PHASED_DELAY);
-		backlight_ops.set_brightness(start);
+		backlight_ops->set_brightness(start);
 	}
 }
 
@@ -192,11 +193,11 @@ int lbm_set_state(int lbm)
 
 	broadcast_lbm_state(lbm);
 	if (lbm) {
-		backlight_ops.set_brightness = lbm_set_brightness;
-		backlight_ops.get_brightness = lbm_get_brightness;
-		backlight_ops.transit_brt = lbm_change_brightness;
+		backlight_ops->set_brightness = lbm_set_brightness;
+		backlight_ops->get_brightness = lbm_get_brightness;
+		backlight_ops->transit_brt = lbm_change_brightness;
 	} else {
-		backlight_ops.restore_brightness_func();
+		backlight_ops->restore_brightness_func();
 	}
 
 	return 0;
@@ -207,7 +208,7 @@ int lbm_get_state(void)
 	if (!lbm_conf.support)
 		return -ENODEV;
 
-	return backlight_ops.set_brightness == lbm_set_brightness;
+	return backlight_ops->set_brightness == lbm_set_brightness;
 }
 
 static void lbm_table_load(char *value, struct lbm_config *c)
@@ -340,3 +341,10 @@ static const struct display_ops display_lbm_ops = {
 };
 
 DISPLAY_OPS_REGISTER(&display_lbm_ops)
+
+static void __CONSTRUCTOR__ initialize(void)
+{
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
+}
diff --git a/plugins/wearable/display/powersaver.c b/plugins/wearable/display/powersaver.c
index 8177e49c..6c1de14b 100644
--- a/plugins/wearable/display/powersaver.c
+++ b/plugins/wearable/display/powersaver.c
@@ -30,6 +30,8 @@
 #include "powersaver.h"
 #include "setting.h"
 
+static struct _backlight_ops *backlight_ops;
+
 static int set_powersaver_mode(int mode)
 {
 	int timeout;
@@ -42,7 +44,7 @@ static int set_powersaver_mode(int mode)
 	_D("Powersaver mode %d pmqos %d.", mode, pmqos);
 	device_notify(DEVICE_NOTIFIER_ULTRAPOWERSAVING, (void *)&pmqos);
 
-	backlight_ops.set_force_brightness(0);
+	backlight_ops->set_force_brightness(0);
 	set_force_lcdtimeout(0);
 
 	FIND_DISPLAY(hbm_ops, "hbm");
@@ -52,7 +54,7 @@ static int set_powersaver_mode(int mode)
 		hbm_ops->func(HBM_SET_TIMEOUT_STATE, &hss);
 	}
 
-	backlight_ops.update();
+	backlight_ops->update();
 	get_run_timeout(&timeout);
 	states[S_NORMAL].timeout = timeout;
 	states[get_pm_cur_state()].trans(EVENT_INPUT);
@@ -153,3 +155,10 @@ static const struct device_ops powersaver_device_ops = {
 };
 
 DEVICE_OPS_REGISTER(&powersaver_device_ops)
+
+static void __CONSTRUCTOR__ initialize(void)
+{
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
+}
diff --git a/plugins/wearable/display/swim.c b/plugins/wearable/display/swim.c
index 36514561..0361d62a 100644
--- a/plugins/wearable/display/swim.c
+++ b/plugins/wearable/display/swim.c
@@ -32,6 +32,7 @@
 #define DBUS_SWIMMODE_MEMBER_STATUS		"status"
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static const struct device_ops *touchscreen_ops;
 static int swimmode_status;
 
@@ -90,7 +91,7 @@ static void swimmode_signal_handler(GDBusConnection  *conn,
 
 	_I("Request swim mode state %d by %d", val, pid);
 
-	if (backlight_ops.get_lcd_power != DPMS_ON) {
+	if (backlight_ops->get_lcd_power != DPMS_ON) {
 		if (disp_plgn->pm_change_internal)
 			disp_plgn->pm_change_internal(INTERNAL_LOCK_SWIM, S_NORMAL);
 		lcd_state = true;
@@ -144,4 +145,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/src/display/ambient-mode.c b/src/display/ambient-mode.c
index fb8809b9..a0bb2bc7 100644
--- a/src/display/ambient-mode.c
+++ b/src/display/ambient-mode.c
@@ -45,6 +45,7 @@
 #define AMBIENT_CLOCK_WAITING_TIME	5000 /* ms */
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 static int ambient_state;
 static int ambient_condition;	/* Setting Value */
 static pid_t ambient_pid;  /* Ambient Clock pid */
@@ -86,7 +87,7 @@ static void ambient_set_condition(keynode_t *key_nodes, void *data)
 
 	val = vconf_keynode_get_bool(key_nodes);
 	if (val != ambient_condition) {
-		if (backlight_ops.get_lcd_power() != DPMS_ON)
+		if (backlight_ops->get_lcd_power() != DPMS_ON)
 			if (disp_plgn->pm_lock_internal)
 				disp_plgn->pm_change_internal(INTERNAL_LOCK_PM, LCD_NORMAL);
 	}
@@ -138,7 +139,7 @@ void ambient_check_invalid_state(pid_t pid)
 
 	if (is_emulator()) {
 		/* In emulator, deviced does not turn off the display. */
-		if (backlight_ops.get_lcd_power() == DPMS_ON)
+		if (backlight_ops->get_lcd_power() == DPMS_ON)
 			return;
 	}
 
@@ -182,7 +183,7 @@ static void ambient_end_clock(pid_t pid)
 	if (update_count == 0) {
 		_D("lcd off");
 
-		backlight_ops.off(NORMAL_MODE);
+		backlight_ops->off(NORMAL_MODE);
 		broadcast_lcd_off_late(LCD_OFF_LATE_MODE);
 		if (disp_plgn->pm_unlock_internal)
 			disp_plgn->pm_unlock_internal(INTERNAL_LOCK_AMBIENT, LCD_OFF, PM_SLEEP_MARGIN);
@@ -310,4 +311,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/src/display/auto-brightness.c b/src/display/auto-brightness.c
index fd3f2df5..fe8fb164 100644
--- a/src/display/auto-brightness.c
+++ b/src/display/auto-brightness.c
@@ -60,6 +60,7 @@
 #define ON_COUNT	1
 #define OFF_COUNT	1
 
+static struct _backlight_ops *backlight_ops;
 static int (*_default_action) (int);
 static guint alc_timeout_id = 0;
 static guint update_timeout;
@@ -107,7 +108,7 @@ static void alc_set_brightness(int setting, int value, float light)
 	static float old;
 	int position, tmp_value = 0, ret;
 
-	ret = backlight_ops.get_brightness(&tmp_value);
+	ret = backlight_ops->get_brightness(&tmp_value);
 	if (ret < 0) {
 		_E("Failed to get display brightness.");
 		return;
@@ -144,8 +145,8 @@ static void alc_set_brightness(int setting, int value, float light)
 			    (step < 0 && tmp_value < value))
 				tmp_value = value;
 
-			backlight_ops.set_default_brt(tmp_value);
-			backlight_ops.update();
+			backlight_ops->set_default_brt(tmp_value);
+			backlight_ops->update();
 		}
 		_I("Load light data(%f) auto brt=%d min brightness=%d "
 		    "brightness=%d", light, automatic_brt, min_brightness, value);
@@ -190,7 +191,7 @@ static bool alc_update_brt(bool setting)
 	}
 
 	light = light_data.values[index];
-	ret = backlight_ops.get_brightness_by_light_sensor(
+	ret = backlight_ops->get_brightness_by_light_sensor(
 			lmax, lmin, light, &value);
 	if (ret == -ENOTSUP) {
 		_E("Not supported to handle the light data.");
@@ -440,8 +441,8 @@ static int set_autobrightness_state(int status)
 			default_brt = brt;
 		}
 
-		backlight_ops.set_default_brt(default_brt);
-		backlight_ops.update();
+		backlight_ops->set_default_brt(default_brt);
+		backlight_ops->update();
 	}
 
 	return 0;
@@ -656,6 +657,10 @@ static void exit_lsensor(void)
 
 static void auto_brightness_init(void *data)
 {
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
+
 	display_info.update_auto_brightness = update_auto_brightness;
 	display_info.set_autobrightness_min = set_autobrightness_min;
 	display_info.reset_autobrightness_min = reset_autobrightness_min;
diff --git a/src/display/device-interface.h b/src/display/device-interface.h
index 078637bf..dec91c99 100644
--- a/src/display/device-interface.h
+++ b/src/display/device-interface.h
@@ -91,7 +91,7 @@ struct _backlight_ops {
 	void (*release_blink)(void);
 };
 
-extern struct _backlight_ops backlight_ops;
+struct _backlight_ops *get_backlight_ops(void);
 
 enum dpms_state {
 	DPMS_ON,       /* In use */
diff --git a/src/display/display-dbus.c b/src/display/display-dbus.c
index 3cd7f200..a808ca09 100644
--- a/src/display/display-dbus.c
+++ b/src/display/display-dbus.c
@@ -69,6 +69,7 @@
 #define EXPIRED_POPUP_ID     "_REQUEST_ID_"
 
 static struct display_plugin *disp_plgn;
+static struct _backlight_ops *backlight_ops;
 
 static GVariant *dbus_start(GDBusConnection *conn,
 	const gchar *sender, const gchar *path, const gchar *iface, const gchar *name,
@@ -389,7 +390,7 @@ static GVariant *dbus_getbrightness(GDBusConnection *conn,
 	int brt = -1, ret, result;
 
 	if (get_pm_cur_state() == S_NORMAL) {
-		ret = backlight_ops.get_brightness(&brt);
+		ret = backlight_ops->get_brightness(&brt);
 		if (ret < 0)
 			result = 0;
 		else
@@ -403,7 +404,7 @@ static GVariant *dbus_getbrightness(GDBusConnection *conn,
 			result = brt;
 		}
 	} else {
-		result = backlight_ops.get_default_brt();
+		result = backlight_ops->get_default_brt();
 		brt = 0;
 	}
 
@@ -452,8 +453,8 @@ static GVariant *dbus_setbrightness(GDBusConnection *conn,
 		if (disp_plgn->auto_brightness_control) {
 			ret = disp_plgn->auto_brightness_control(BR_SET_BRIGHTNESS, brt);
 		} else {
-			backlight_ops.set_default_brt(brt);
-			ret = backlight_ops.set_brightness(brt);
+			backlight_ops->set_default_brt(brt);
+			ret = backlight_ops->set_brightness(brt);
 			if (ret < 0)
 				goto error;
 			ret = vconf_set_int(VCONFKEY_SETAPPL_LCD_BRIGHTNESS, brt);
@@ -462,7 +463,7 @@ static GVariant *dbus_setbrightness(GDBusConnection *conn,
 		}
 	} else if (state == DISPLAY_STATE_SCREEN_DIM) {
 		if (get_pm_cur_state() == S_LCDDIM) {
-			ret = backlight_ops.set_brightness(brt);
+			ret = backlight_ops->set_brightness(brt);
 			if (ret < 0)
 				goto error;
 		}
@@ -514,7 +515,7 @@ static GVariant *dbus_holdbrightness(GDBusConnection *conn,
 	if (disp_plgn->auto_brightness_control)
 		ret = disp_plgn->auto_brightness_control(BR_HOLD_BRIGHTNESS, brt);
 	else
-		ret = backlight_ops.set_brightness(brt);
+		ret = backlight_ops->set_brightness(brt);
 
 	if (ret < 0)
 		goto error;
@@ -577,7 +578,7 @@ static GVariant *dbus_releasebrightness(GDBusConnection *conn,
 	if (ret < 0)
 		_E("Failed to set vconf value for custom brightness status: %d", vconf_get_ext_errno());
 
-	ret = backlight_ops.get_brightness(&brt);
+	ret = backlight_ops->get_brightness(&brt);
 	if (ret < 0)
 		brt = ret;
 
@@ -586,7 +587,7 @@ static GVariant *dbus_releasebrightness(GDBusConnection *conn,
 	    charger == VCONFKEY_SYSMAN_CHARGER_DISCONNECTED && !changed) {
 		_D("batt warning low : brightness is not changed!");
 		if (brt != 0)
-			backlight_ops.set_brightness(0);
+			backlight_ops->set_brightness(0);
 		goto error;
 	}
 
@@ -595,7 +596,7 @@ static GVariant *dbus_releasebrightness(GDBusConnection *conn,
 			disp_plgn->auto_brightness_control(BR_RELEASE_BRIGHTNESS, BR_IMPLICIT);
 		} else {
 			if (brt != setting)
-				backlight_ops.set_brightness(setting);
+				backlight_ops->set_brightness(setting);
 		}
 	} else if (autobrt == SETTING_BRIGHTNESS_AUTOMATIC_PAUSE) {
 		_D("Auto brightness will be enable");
@@ -630,15 +631,15 @@ static GVariant *dbus_setrefreshrate(GDBusConnection *conn,
 	control = display_conf.control_display;
 
 	if (control)
-		backlight_ops.off(NORMAL_MODE);
+		backlight_ops->off(NORMAL_MODE);
 
 	_D("app : %d, value : %d", app, val);
-	ret = backlight_ops.set_frame_rate(val);
+	ret = backlight_ops->set_frame_rate(val);
 	if (ret < 0)
 		_E("Failed to set frame rate (%d)", ret);
 
 	if (control)
-		backlight_ops.on(NORMAL_MODE);
+		backlight_ops->on(NORMAL_MODE);
 
 error:
 	return g_variant_new("(i)", ret);
@@ -751,13 +752,13 @@ static GVariant *dbus_dumpmode(GDBusConnection *conn,
 		if (disp_plgn->pm_lock_internal)
 			disp_plgn->pm_lock_internal(INTERNAL_LOCK_DUMPMODE, LCD_OFF,
 				STAY_CUR_STATE, DUMP_MODE_WATING_TIME);
-		backlight_ops.release_blink();
+		backlight_ops->release_blink();
 	} else if (!strcmp(on, "off")) {
 		if (disp_plgn->pm_unlock_internal)
 			disp_plgn->pm_unlock_internal(INTERNAL_LOCK_DUMPMODE, LCD_OFF, PM_SLEEP_MARGIN);
-		backlight_ops.blink(0);
+		backlight_ops->blink(0);
 	} else if (!strcmp(on, "blink")) {
-		backlight_ops.blink(500);
+		backlight_ops->blink(500);
 	} else {
 		ret = -EINVAL;
 	}
@@ -926,7 +927,7 @@ static GVariant *dbus_getcustombrightness(GDBusConnection *conn,
 {
 	int status = 0;
 
-	status = backlight_ops.get_custom_status();
+	status = backlight_ops->get_custom_status();
 
 	return g_variant_new("(i)", status);
 }
@@ -1156,7 +1157,7 @@ static GVariant *dbus_dimstay_control(GDBusConnection *conn,
 	}
 
 	if (get_pm_cur_state() == S_NORMAL)
-		backlight_ops.update();
+		backlight_ops->update();
 
 	return g_variant_new("(i)", 0);
 }
@@ -1168,8 +1169,8 @@ static GVariant *dbus_getbrightnessinfo(GDBusConnection *conn,
 	int default_brightness;
 	int current_brightness;
 
-	default_brightness = backlight_ops.get_default_brt();
-	backlight_ops.get_brightness_raw(&current_brightness);
+	default_brightness = backlight_ops->get_default_brt();
+	backlight_ops->get_brightness_raw(&current_brightness);
 
 	return g_variant_new("(ii)", default_brightness, current_brightness);
 }
@@ -1304,4 +1305,8 @@ static void __CONSTRUCTOR__ initialize(void)
 	if (!disp_plgn) {
 		_E("Failed to get display plugin.");
 	}
+
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
 }
diff --git a/src/display/display-lock.c b/src/display/display-lock.c
index b34ab615..088b9245 100644
--- a/src/display/display-lock.c
+++ b/src/display/display-lock.c
@@ -33,6 +33,7 @@
 #define PID_MAX			6
 #define LOCK_TIME_WARNING	60	/* 60 seconds */
 
+static struct _backlight_ops *backlight_ops;
 static dd_list *cond_head[S_END];
 static int trans_condition;
 
@@ -124,7 +125,7 @@ static gboolean pmlock_check(void *data)
 	v = (GVariant*)data;
 	g_variant_get(v, "(ii)", &state, &pid);
 
-	if (state == S_LCDOFF && backlight_ops.get_lcd_power() == DPMS_ON) {
+	if (state == S_LCDOFF && backlight_ops->get_lcd_power() == DPMS_ON) {
 		_D("Lcd state is PM_LCD_POWER_ON");
 		return G_SOURCE_CONTINUE;
 	}
@@ -391,3 +392,10 @@ dd_list *get_cond_head(enum state_t s_index)
 {
 	return cond_head[s_index];
 }
+
+static void __CONSTRUCTOR__ initialize(void)
+{
+	backlight_ops = get_backlight_ops();
+	if (!backlight_ops)
+		_E("Failed to get backlight operator.");
+}
diff --git a/src/touchscreen/touchscreen.c b/src/touchscreen/touchscreen.c
index 295503bb..dff61ce9 100644
--- a/src/touchscreen/touchscreen.c
+++ b/src/touchscreen/touchscreen.c
@@ -50,6 +50,8 @@ static int booting_done(void *data);
 static struct display_config *_display_conf;
 static struct _backlight_ops *_backlight_ops;
 
+static struct _backlight_ops* (*_get_backlight_ops)(void);
+
 static void touchscreen_wakeup_status(keynode_t *key, void *data)
 {
 	if (!key)
@@ -315,12 +317,20 @@ static void touchscreen_init(void *data)
 	int ret, val;
 
 	_display_conf = dlsym(disp_plgn->handle, "display_conf");
-		if (!_display_conf)
+	if (!_display_conf)
 		_E("Failed to obtain address of display_conf, %s.", dlerror());
 
-	_backlight_ops = dlsym(disp_plgn->handle, "backlight_ops");
-	if (!_backlight_ops)
-		_E("Failed to obtain address of backlight_ops.");
+	/* 'backlight_ops' is declared static and used a lot of places with same name.
+	 * So it fails that fetching symbol directly with name 'backlight_ops'.
+	 * To avoid this, fetches getter function 'get_backlight_ops' instead, and
+	 * retrieve the 'backlight_ops' by using it */
+	_get_backlight_ops = dlsym(disp_plgn->handle, "get_backlight_ops");
+	if (_get_backlight_ops) {
+		_backlight_ops = _get_backlight_ops();
+		if (!_backlight_ops)
+			_E("Failed to get backlight operator.");
+	} else
+		_E("Failed to obtain address of get_backlight_ops, %s.", dlerror());
 
 	if (touchscreen_dev && touchscreen_dev->set_powersaving) {
 		ret = touchscreen_dev->set_powersaving(0);