linux-kernel - Re: [PATCH 10/33] fbcon: call fbcon_fb

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Message-ID: <CAKMK7uHQo83UZmkV=gd3hHCMpusSdK_6O_UQnnHdSm+kLMgmmA@mail.gmail.com>
Date:   Mon, 20 May 2019 19:25:28 +0200
From:   Daniel Vetter <daniel.vetter@...ll.ch>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Yisheng Xie <ysxie@...mail.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mikulas Patocka <mpatocka@...hat.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Peter Rosin <peda@...ntia.se>
Subject: Re: [PATCH 10/33] fbcon: call fbcon_fb_(un)registered directly

On Mon, May 20, 2019 at 7:08 PM Sam Ravnborg <sam@...nborg.org> wrote:
>
> Hi Daniel.
>
> While browsing this nice patch series I stumbled upon a detail.
>
> On Mon, May 20, 2019 at 10:21:53AM +0200, Daniel Vetter wrote:
> > With
> >
> > commit 6104c37094e729f3d4ce65797002112735d49cd1
> > Author: Daniel Vetter <daniel.vetter@...ll.ch>
> > Date:   Tue Aug 1 17:32:07 2017 +0200
> >
> >     fbcon: Make fbcon a built-time depency for fbdev
> >
> > we have a static dependency between fbcon and fbdev, and we can
> > replace the indirection through the notifier chain with a function
> > call.
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
> > Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> > Cc: Daniel Vetter <daniel.vetter@...ll.ch>
> > Cc: Hans de Goede <hdegoede@...hat.com>
> > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > Cc: "Noralf Trønnes" <noralf@...nnes.org>
> > Cc: Yisheng Xie <ysxie@...mail.com>
> > Cc: Peter Rosin <peda@...ntia.se>
> > Cc: "Michał Mirosław" <mirq-linux@...e.qmqm.pl>
> > Cc: Thomas Zimmermann <tzimmermann@...e.de>
> > Cc: Mikulas Patocka <mpatocka@...hat.com>
> > Cc: linux-fbdev@...r.kernel.org
> > ---
> > diff --git a/include/linux/fb.h b/include/linux/fb.h
> > index f52ef0ad6781..701abaf79c87 100644
> > --- a/include/linux/fb.h
> > +++ b/include/linux/fb.h
> > @@ -136,10 +136,6 @@ struct fb_cursor_user {
> >  #define FB_EVENT_RESUME                      0x03
> >  /*      An entry from the modelist was removed */
> >  #define FB_EVENT_MODE_DELETE            0x04
> > -/*      A driver registered itself */
> > -#define FB_EVENT_FB_REGISTERED          0x05
> > -/*      A driver unregistered itself */
> > -#define FB_EVENT_FB_UNREGISTERED        0x06
> >  /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
> >  #define FB_EVENT_GET_CONSOLE_MAP        0x07
> >  /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
>
> This breaks build of arch/arm/mach-pxa/am200epd.c thats uses
> FB_EVENT_FB_*REGISTERED:
>
>
>        if (event == FB_EVENT_FB_REGISTERED)
>                 return am200_share_video_mem(info);
>         else if (event == FB_EVENT_FB_UNREGISTERED)
>                 return am200_unshare_video_mem(info);
>
>
> Found while grepping for "FB_EVENT" so this is not a build
> error I triggered.

Oh this is glorious :-/

Thanks a lot for spotting this, I guess I need to hack around on
metronomefb a bit ...
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch