Hi Ville,
2015-11-13 Ville Syrjälä <ville.syrj...@linux.intel.com>:
> On Fri, Nov 13, 2015 at 11:45:58AM -0200, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>
> >
> > Fixes an regression added by 3ae2436 (drm/exynos/mixer: replace
> > direct cross-driver call with drm mode) and while this regression was
> > caused by a change in the exynos driver it makes sense to add the
> > check on atomic core to benefit other drivers as well.
> >
> > The whole atomic update fails if the exynos hdmi display is not
> > present/active. Add a test to only run atomic_check() if the CRTC is
> > active.
>
> The check must be performed even when the crtc is not active.
>
> Especially important for the (enabled && !active) case (ie. DPMS off)
> since "DPMS on" must not fail, so any state change while in DPMS off
> must be checked as if the crtc was active.
>
> But even for the !enabled case we want to do the check so that
> everything gets properly recomputed when fully disabling a crtc.
You are right. I'll fix this locally in exynos for now.
Gustavo
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