Re: [PATCH] drm/nouveau: tegra: Initialize mode configuration

[Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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On Tue, Nov 06, 2018 at 06:41:22PM +0200, Ville Syrjälä wrote:
> On Tue, Nov 06, 2018 at 05:24:15PM +0100, Thierry Reding wrote:
> > From: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> > 
> > Irrespective of whether or not the device has any usable outputs, the
> > modesetting helpers will try to register all the resources such as CRTCs
> > and planes. Unfortunately, the helpers rely on drm_mode_config_init() to
> > properly set up internal data structures. Since the Tegra GPU does not
> > have a display engine, the Nouveau driver doesn't set this up for Tegra,
> > which results in the following oops on driver probe:
> 
> Remove DRIVER_MODESET ?

Yeah, that works as well. Technically I suppose somebody could be
instantiating the IP in an SoC and include a display engine, in which
case we'd need the DRIVER_MODESET feature again, but I'm not aware of
anyone doing that, so it may not be worth planning for that at this
point.

Thierry

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