diff --git a/exynos4/exynos4x12/liblights/lights.c b/exynos4/exynos4x12/liblights/lights.c
index e8336d2..2e5c029 100644
--- a/exynos4/exynos4x12/liblights/lights.c
+++ b/exynos4/exynos4x12/liblights/lights.c
@@ -89,6 +89,21 @@
     }
 }
 
+static int read_int(char const *path)
+{
+    int fd;
+    char buffer[2];
+
+    fd = open(path, O_RDONLY);
+
+    if (fd >= 0) {
+        read(fd, buffer, 1);
+    }
+    close(fd);
+
+    return atoi(buffer);
+}
+
 static int write_str(char const *path, const char* value)
 {
     int fd;
@@ -126,14 +141,14 @@
             struct light_state_t const *state)
 {
     int err = 0;
-    static int s_previous_brightness = -1;
     int brightness = rgb_to_brightness(state);
+    int previous_brightness = read_int(PANEL_FILE);
 
     pthread_mutex_lock(&g_lock);
+
     err = write_int(PANEL_FILE, brightness);
-    if (!s_previous_brightness && (brightness > 0)) {
+    if (!previous_brightness && (brightness > 0)) {
         err = write_int(BUTTON_FILE, brightness > 0 ? 1 : 2);
-        s_previous_brightness = brightness;
     }
     pthread_mutex_unlock(&g_lock);
 
diff --git a/exynos4/hal/include/gralloc_priv.h b/exynos4/hal/include/gralloc_priv.h
index 8ffd161..871a84f 100644
--- a/exynos4/hal/include/gralloc_priv.h
+++ b/exynos4/hal/include/gralloc_priv.h
@@ -47,6 +47,17 @@
 
 #define GRALLOC_ARM_UMP_MODULE 1
 
+enum {
+    /* SEC Private usage , for HWC to set HDMI S3D format */
+    /* HDMI should display this buffer as S3D SBS LR/RL*/
+    GRALLOC_USAGE_PRIVATE_SBS_LR        = 0x00400000,
+    GRALLOC_USAGE_PRIVATE_SBS_RL        = 0x00200000,
+
+    /* HDMI should display this buffer as 3D TB LR/RL*/
+    GRALLOC_USAGE_PRIVATE_TB_LR         = 0x00100000,
+    GRALLOC_USAGE_PRIVATE_TB_RL         = 0x00080000,
+};
+
 struct private_handle_t;
 
 struct private_module_t {