[PATCH] fb: sync enable device parameter with internal state

[Sascha Hauer]

On Wed, Nov 18, 2020 at 12:14:45PM +0100, Ahmad Fatoum wrote:
> So far fb.enable only reflected whether the fb was enabled/disabled via
> device parameter. Enabling/disabling the fb via ioctl left the
> parameter untouched. Remedy this.
> 
> While at it, have setting of fb.enable if the underlying
> fb_enable/fb_disable fails as well.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  drivers/video/fb.c | 21 ++++++++++++---------
>  1 file changed, 12 insertions(+), 9 deletions(-)

Applied, thanks

Sascha

> 
> diff --git a/drivers/video/fb.c b/drivers/video/fb.c
> index 2d82bc01fa04..113c1419a1c1 100644
> --- a/drivers/video/fb.c
> +++ b/drivers/video/fb.c
> @@ -119,22 +119,25 @@ int fb_disable(struct fb_info *info)
>  	return 0;
>  }
>  
> +static int fb_enable_get(struct param_d *param, void *priv)
> +{
> +	struct fb_info *info = priv;
> +
> +	info->p_enable = info->enabled;
> +	return 0;
> +}
> +
>  static int fb_enable_set(struct param_d *param, void *priv)
>  {
>  	struct fb_info *info = priv;
> -	int enable;
>  
>  	if (!info->mode)
>  		return -EINVAL;
>  
> -	enable = info->p_enable;
> -
> -	if (enable)
> -		fb_enable(info);
> +	if (info->p_enable)
> +		return fb_enable(info);
>  	else
> -		fb_disable(info);
> -
> -	return 0;
> +		return fb_disable(info);
>  }
>  
>  static struct fb_videomode *fb_num_to_mode(struct fb_info *info, int num)
> @@ -314,7 +317,7 @@ int register_framebuffer(struct fb_info *info)
>  	if (ret)
>  		goto err_free;
>  
> -	dev_add_param_bool(dev, "enable", fb_enable_set, NULL,
> +	dev_add_param_bool(dev, "enable", fb_enable_set, fb_enable_get,
>  			&info->p_enable, info);
>  
>  	if (IS_ENABLED(CONFIG_DRIVER_VIDEO_EDID))
> -- 
> 2.29.2
> 
> 
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> 

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