linux-kernel - Re: ERROR: modpost: "drm_display_mode_to_videomode" [drivers/gpu/drm/bridge/lontium-lt8912b.ko] undefined!

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Message-ID: <20210504190452.GW6564@kitsune.suse.cz>
Date:   Tue, 4 May 2021 21:04:52 +0200
From:   Michal Suchánek <msuchanek@...e.de>
To:     Adrien Grassein <adrien.grassein@...il.com>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: ERROR: modpost: "drm_display_mode_to_videomode"
 [drivers/gpu/drm/bridge/lontium-lt8912b.ko] undefined!

Hello,

I have only one from ppc64, the other architectures don't have the
problem or fail earlier.

Thanks

Michal

On Tue, May 04, 2021 at 08:45:01PM +0200, Adrien Grassein wrote:
> Hello,
> 
> I think this is self-evident but could you please send the config to confirm?
> 
> Thanks,
> 
> Le mar. 4 mai 2021 à 20:30, Michal Suchánek <msuchanek@...e.de> a écrit :
> >
> > Hello,
> >
> > I get errors about missing symbol in the lontium-lt8912b module.
> >
> > Is the problem self-evident or do you need the config as well?
> >
> > I don't need the driver for anything, it was just auto-enabled because
> > it's new and the change has not been reviewed.
> >
> > Thanks
> >
> > Michal
> > >
> > > Last output:
> > >   WRAP    arch/powerpc/boot/zImage.maple
> > >   WRAP    arch/powerpc/boot/zImage.pseries
> > > make[2]: *** Deleting file 'modules-only.symvers'
> > >   MODPOST modules-only.symvers
> > > ERROR: modpost: "drm_display_mode_to_videomode" [drivers/gpu/drm/bridge/lontium-lt8912b.ko] undefined!
> > > make[2]: *** [../scripts/Makefile.modpost:150: modules-only.symvers] Error 1
> > > make[1]: *** [/home/abuild/rpmbuild/BUILD/kernel-vanilla-5.12.0.13670.g5e321ded302d/linux-5.12-13670-g5e321ded302d/Makefile:1770: modules] Error 2
> > > make: *** [../Makefile:215: __sub-make] Error 2
> > > error: Bad exit status from /var/tmp/rpm-tmp.q1oSIp (%build)

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