# Re: \[PATCH\] backlight: lp855x: set zero brightness at FBBLANK

- From: Jingoo Han \<hidden\>
- Date: 2013-07-03 01:52:21 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2013/07/4077040
- Thread: https://ratatoskr.run/linux-fbdev/2013/07/4076709/t.md

```text
On Tuesday, July 02, 2013 9:16 PM, Oskar Andero wrote:
> 
> From: Shingo Nakao <redacted>
> 
> 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 <redacted>
> Cc: Milo Kim <redacted>
> Cc: Richard Purdie <redacted>
> Signed-off-by: Oskar Andero <redacted>

Acked-by: Jingoo Han <redacted>

Best regards,
Jingoo Han

> ---
>  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
> 


```