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Date:   Sat, 23 May 2020 11:38:32 +0200
From:   Daniel G <dagmcr@...il.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Daniel Vetter <daniel@...ll.ch>, airlied@...ux.ie,
        kieran.bingham+renesas@...asonboard.com,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm: rcar-du: Fix build error

Hi Laurent,

On Fri, 22 May 2020 at 22:24, Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> Hi Daniel,
>
> Thank you for the patch.
>
> On Mon, May 18, 2020 at 10:16:46PM +0200, Daniel Gomez wrote:
> > Select DRM_KMS_HELPER dependency.
> >
> > Build error when DRM_KMS_HELPER is not selected:
> >
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xd48): undefined reference to `drm_atomic_helper_bridge_duplicate_state'
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xd50): undefined reference to `drm_atomic_helper_bridge_destroy_state'
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xd70): undefined reference to `drm_atomic_helper_bridge_reset'
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xdc8): undefined reference to `drm_atomic_helper_connector_reset'
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xde0): undefined reference to `drm_helper_probe_single_connector_modes'
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xe08): undefined reference to `drm_atomic_helper_connector_duplicate_state'
> > drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xe10): undefined reference to `drm_atomic_helper_connector_destroy_state'
> >
Fixes: c6a27fa41fab ("drm: rcar-du: Convert LVDS encoder code to bridge driver")
> > Signed-off-by: Daniel Gomez <dagmcr@...il.com>
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
> and taken in my tree for v5.9. If you think it should get in v5.8 as a
> fix, I can do so as well, could you then provide a Fixes: tag ?
That would be fine. You can find above the fixes tag.
Thanks!

>
> > ---
> >  drivers/gpu/drm/rcar-du/Kconfig | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
> > index 0919f1f159a4..f65d1489dc50 100644
> > --- a/drivers/gpu/drm/rcar-du/Kconfig
> > +++ b/drivers/gpu/drm/rcar-du/Kconfig
> > @@ -31,6 +31,7 @@ config DRM_RCAR_DW_HDMI
> >  config DRM_RCAR_LVDS
> >       tristate "R-Car DU LVDS Encoder Support"
> >       depends on DRM && DRM_BRIDGE && OF
> > +     select DRM_KMS_HELPER
> >       select DRM_PANEL
> >       select OF_FLATTREE
> >       select OF_OVERLAY
>
> --
> Regards,
>
> Laurent Pinchart
Daniel

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