linux-kernel - Re: [PATCH 1/2] staging/vboxvideo: Don't set FBINFO_MISC_ALWAYS

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Date:   Wed, 16 Jan 2019 11:25:14 +0100
From:   Daniel Vetter <daniel@...ll.ch>
To:     DRI Development <dri-devel@...ts.freedesktop.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Alexander Kapshuk <alexander.kapshuk@...il.com>
Subject: Re: [PATCH 1/2] staging/vboxvideo: Don't set
 FBINFO_MISC_ALWAYS_SETPAR

On Tue, Jan 15, 2019 at 11:27:54AM +0100, Daniel Vetter wrote:
> It's a debug hack flag useful to work around driver bugs. That's not a
> good idea for a new driver. Especially for a new drm driver.
> 
> Aside: the fbdev support should probably be converted over to the new
> generic fbdev support.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Hans de Goede <hdegoede@...hat.com>
> Cc: Daniel Vetter <daniel.vetter@...ll.ch>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> Cc: Alexander Kapshuk <alexander.kapshuk@...il.com>
> ---
>  drivers/staging/vboxvideo/vbox_fb.c | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/staging/vboxvideo/vbox_fb.c b/drivers/staging/vboxvideo/vbox_fb.c
> index 2181c36c19ab..1da4cb7647b8 100644
> --- a/drivers/staging/vboxvideo/vbox_fb.c
> +++ b/drivers/staging/vboxvideo/vbox_fb.c
> @@ -91,11 +91,6 @@ int vboxfb_create(struct drm_fb_helper *helper,
>  	fb = &vbox->afb.base;
>  	helper->fb = fb;
>  
> -	/*
> -	 * The last flag forces a mode set on VT switches even if the kernel
> -	 * does not think it is needed.
> -	 */
> -	info->flags = FBINFO_MISC_ALWAYS_SETPAR;

For the record I screwed up rebasing this one because it was in some patch
that also removed FBINFO_DEFAULT (which is 0, so pointless to set since
the structure is kzalloc'ed). Actually merged patch also removes
FBINFO_DEFAULT :-/ No real harm done though since as explained 0 doesn't
matter here.
-Daniel
>  	info->fbops = &vboxfb_ops;
>  
>  	/*
> -- 
> 2.20.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch