linux-kernel - RE: [PATCH 6/6] video: s3c-fb: Don't keep device runtime active when open

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Date:	Thu, 29 Dec 2011 08:55:12 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Mark Brown' <broonie@...nsource.wolfsonmicro.com>,
	'Florian Tobias Schandinat' <FlorianSchandinat@....de>
Cc:	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: RE: [PATCH 6/6] video: s3c-fb: Don't keep device runtime active when
 open

> -----Original Message-----
> From: Mark Brown [mailto:broonie@...nsource.wolfsonmicro.com]
> Sent: Tuesday, December 27, 2011 11:16 PM
> To: Jingoo Han; Florian Tobias Schandinat
> Cc: linux-fbdev@...r.kernel.org; linux-kernel@...r.kernel.org; Mark Brown
> Subject: [PATCH 6/6] video: s3c-fb: Don't keep device runtime active when open
> 
> Allow the controller to be runtime suspended when the screen is blanked
> by not taking a runtime reference while the device is open. This allows
> greater system wide power savings when used with a standard application
> layer and ensures that the screen does not blank unless requested.
> 
> Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>

		Acked-by: Jingoo Han <jg1.han@...sung.com>

> ---
>  drivers/video/s3c-fb.c |   22 ----------------------
>  1 files changed, 0 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
> index 84cf631..0c63b69 100644
> --- a/drivers/video/s3c-fb.c
> +++ b/drivers/video/s3c-fb.c
> @@ -1070,30 +1070,8 @@ static int s3c_fb_ioctl(struct fb_info *info, unsigned int cmd,
>  	return ret;
>  }
> 
> -static int s3c_fb_open(struct fb_info *info, int user)
> -{
> -	struct s3c_fb_win *win = info->par;
> -	struct s3c_fb *sfb = win->parent;
> -
> -	pm_runtime_get_sync(sfb->dev);
> -
> -	return 0;
> -}
> -
> -static int s3c_fb_release(struct fb_info *info, int user)
> -{
> -	struct s3c_fb_win *win = info->par;
> -	struct s3c_fb *sfb = win->parent;
> -
> -	pm_runtime_put_sync(sfb->dev);
> -
> -	return 0;
> -}
> -
>  static struct fb_ops s3c_fb_ops = {
>  	.owner		= THIS_MODULE,
> -	.fb_open	= s3c_fb_open,
> -	.fb_release	= s3c_fb_release,
>  	.fb_check_var	= s3c_fb_check_var,
>  	.fb_set_par	= s3c_fb_set_par,
>  	.fb_blank	= s3c_fb_blank,
> --
> 1.7.7.3

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