From: yzq <yzq@rock-chips.com>
Date: Mon, 15 Oct 2012 09:38:08 +0000 (+0800)
Subject: backlight: if min_brightness not zero,when suspend,the pwm value not be zero
X-Git-Tag: firefly_0821_release~8416
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=73d0f024c367d6f3a98c37a6ab7448d595490824;p=firefly-linux-kernel-4.4.55.git

backlight: if min_brightness not zero,when suspend,the pwm value not be zero
		case problem: flash screen when resume.
---

diff --git a/drivers/video/backlight/rk29_backlight.c b/drivers/video/backlight/rk29_backlight.c
index f7f4a5a8f20e..3412f2931193 100755
--- a/drivers/video/backlight/rk29_backlight.c
+++ b/drivers/video/backlight/rk29_backlight.c
@@ -101,6 +101,9 @@ static int rk29_bl_update_status(struct backlight_device *bl)
 	if (suspend_flag)
 		return 0;	
 
+	if (bl->props.brightness < rk29_bl_info->min_brightness && bl->props.brightness != 0)	/*avoid can't view screen when close backlight*/
+		brightness = rk29_bl_info->min_brightness;
+
 	if (bl->props.power != FB_BLANK_UNBLANK)
 		brightness = 0;
 
@@ -110,9 +113,6 @@ static int rk29_bl_update_status(struct backlight_device *bl)
 	if (bl->props.state & BL_CORE_SUSPENDED)
 		brightness = 0;
 
-	if (bl->props.brightness < rk29_bl_info->min_brightness)	/*avoid can't view screen when close backlight*/
-		brightness = rk29_bl_info->min_brightness;
-
 	div_total = read_pwm_reg(id, PWM_REG_LRC);
 	if (ref) {
 		divh = div_total*brightness/BL_STEP;