linux-kernel - Re: [PATCH v2] drm/panel: Select DRM_DP_HELPER for DRM_PANEL

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Message-ID: <CAD=FV=UbiXx4RBQNFp1htCYsM1YzAgES+mcA6KOJ7ZmydkHnBg@mail.gmail.com>
Date:   Wed, 23 Feb 2022 08:11:04 -0800
From:   Doug Anderson <dianders@...omium.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Thomas Zimmermann <tzimmermann@...e.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Lyude Paul <lyude@...hat.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Arnd Bergmann <arnd@...db.de>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kernel Functional Testing <lkft@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>
Subject: Re: [PATCH v2] drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP

Hi,

On Tue, Feb 22, 2022 at 1:31 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> On Tue, Feb 8, 2022 at 10:39 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > On Mon, Feb 7, 2022 at 12:31 PM Thomas Zimmermann <tzimmermann@...e.de> wrote:
> > > As reported in [1], DRM_PANEL_EDP depends on DRM_DP_HELPER. Select
> > > the option to fix the build failure. The error message is shown
> > > below.
> > >
> > >   arm-linux-gnueabihf-ld: drivers/gpu/drm/panel/panel-edp.o: in function
> > >     `panel_edp_probe': panel-edp.c:(.text+0xb74): undefined reference to
> > >     `drm_panel_dp_aux_backlight'
> > >   make[1]: *** [/builds/linux/Makefile:1222: vmlinux] Error 1
> > >
> > > The issue has been reported before, when DisplayPort helpers were
> > > hidden behind the option CONFIG_DRM_KMS_HELPER. [2]
> > >
> > > v2:
> > >         * fix and expand commit description (Arnd)
> > >
> > > Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
> >
> > Thanks for your patch!
> >
> > This fixes the build errors I'm seeing, so
> > Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>
>
> Is this planned to be queued? This is still failing in drm-next.
> Thanks!

Looks like this has been in drm-misc-next since Feb 4:

---

commit eea89dff4c39a106f98d1cb5e4d626f8c63908b9
Author:     Thomas Zimmermann <tzimmermann@...e.de>
AuthorDate: Thu Feb 3 10:39:22 2022 +0100
Commit:     Thomas Zimmermann <tzimmermann@...e.de>
CommitDate: Fri Feb 4 09:38:47 2022 +0100

    drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP

---

Maybe it needed to land elsewhere, though?

-Doug