commit 679d203f63c9c6c64825b2df0b0f005e4aaaeee4
author Gary D <garyd9@gmail.com> Thu Jun 28 05:05:36 2012 -0400
committer Gary D <garyd9@gmail.com> Thu Jun 28 05:05:36 2012 -0400
tree 386f7ca68668c184d50247f77c234f5707087395
parent f2d31f2429158e5d7e62264e302a28cea327a5f1

fix keypad lighting up when screen backlight auto-adjusts

If the screen backlight was already lit and is just changing brightness,
don't blindly illuminate the keypad

Change-Id: If7473eb57aa4d48bc98a4bb42b9becc80764b1f8
Signed-off-by: Gary D <garyd9@gmail.com>

exynos4/exynos4x12/liblights/lights.c

diff --git a/exynos4/exynos4x12/liblights/lights.c b/exynos4/exynos4x12/liblights/lights.c
index 43801ff..de2f653 100644
--- a/exynos4/exynos4x12/liblights/lights.c
+++ b/exynos4/exynos4x12/liblights/lights.c
@@ -126,11 +126,15 @@
             struct light_state_t const *state)
 {
     int err = 0;
+    status int s_previous_brightness = -1;
     int brightness = rgb_to_brightness(state);
 
     pthread_mutex_lock(&g_lock);
     err = write_int(PANEL_FILE, brightness);
-    err = write_int(BUTTON_FILE, brightness > 0 ? 1 : 2);
+    if (!s_previous_brightness && (brightness > 0)) {
+        err = write_int(BUTTON_FILE, brightness > 0 ? 1 : 2);
+        s_previous_brightness = brightness;
+    }
     pthread_mutex_unlock(&g_lock);
 
     return err;