[Intel-gfx] [PATCH] drm/i915: force full modeset if the connector is in DPMS OFF mode

[Imre Deak]

On Fri, 2013-05-03 at 13:32 +0200, Daniel Vetter wrote:
> On Fri, May 3, 2013 at 1:27 PM, Daniel Vetter <daniel at ffwll.ch> wrote:
> > On Fri, May 3, 2013 at 1:22 PM, Imre Deak <imre.deak at intel.com> wrote:
> >> Currently the driver's assumed behavior for a modeset with an attached
> >> FB is that the corresponding connector will be switched to DPMS ON mode
> >> if it happened to be in DPMS OFF (or another power save mode). This
> >> wasn't enforced though if only the FB changed, everything else (format,
> >> connector etc.) remaining the same. In this case we only set the new FB
> >> base and left the connector in the old power save mode.
> >>
> >> Fix this by forcing a full modeset whenever there is an attached FB and
> >> any affected connector is in a power save mode.
> >>
> >> Signed-off-by: Imre Deak <imre.deak at intel.com>
> >
> >
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61642

Chris marked this as a dup for another bug with an other root cause.

> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59834

Yes, this is tested against the patch already.

> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59339

Ok I'll point them to the fix.

> > Safe for the first just a few wild guesses. Can you please spam
> > bugzilla with this patch (there's tons more spurious kms_flip fail
> > iirc, also a few of the kms_flip jitter reports should be fixed by
> > now).
> 
> Also, and i-g-t to specifically exercise this would be nice ... Maybe
> easiest on top of kms_flip, using dpms off, but then a set_base as an
> implicit dpms on.

Ok, will put together something.

--Imre

> -Daniel
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch