linux-kernel - [PATCH] backlight: lp855x: set zero brightness at FBBLANK

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Date:	Tue, 2 Jul 2013 14:15:54 +0200
From:	Oskar Andero <oskar.andero@...ymobile.com>
To:	<linux-kernel@...r.kernel.org>, <linux-fbdev@...r.kernel.org>
CC:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Radovan Lekanovic <Radovan.Lekanovic@...ymobile.com>,
	Shingo Nakao <shingo.x.nakao@...ymobile.com>,
	Milo Kim <milo.kim@...com>, Richard Purdie <rpurdie@...ys.net>,
	Oskar Andero <oskar.andero@...ymobile.com>
Subject: [PATCH] backlight: lp855x: set zero brightness at FBBLANK

From: Shingo Nakao <shingo.x.nakao@...ymobile.com>

When backlight turns on early from display, a white line can be
seen on the screen. Therefore make sure backlight is off when we
are under an fb blank event.

Signed-off-by: Shingo Nakao <shingo.x.nakao@...ymobile.com>
Cc: Milo Kim <milo.kim@...com>
Cc: Richard Purdie <rpurdie@...ys.net>
Signed-off-by: Oskar Andero <oskar.andero@...ymobile.com>
---
 drivers/video/backlight/lp855x_bl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index a0e1e02..c0b41f1 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -246,7 +246,7 @@ static int lp855x_bl_update_status(struct backlight_device *bl)
 {
 	struct lp855x *lp = bl_get_data(bl);
 
-	if (bl->props.state & BL_CORE_SUSPENDED)
+	if (bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
 		bl->props.brightness = 0;
 
 	if (lp->mode == PWM_BASED) {
-- 
1.8.1.5

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