[Intel-gfx] stable 3.19 backport request

[Jani Nikula]

Stable team, please backport

commit f9b61ff6bce9a44555324b29e593fdffc9a115bc
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Jan 7 13:54:39 2015 +0100

    drm/i915: Push vblank enable/disable past encoder->enable/disable

to 3.19.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89108

Quite likely also

References: http://mid.gmane.org/20150131211609.GA3710@yulia-desktop
References: http://mid.gmane.org/CA+55aFwCf+94-5E+axJNu3GdCTF=1TKDA9D6GfM4SDOvFnN94g@mail.gmail.com

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Technology Center