[Bug 86767] [BSW/SKL/HSW/APL] igt / kms_rotation_crc subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86767

--- Comment #36 from yann <yann.argotti at intel.com> ---
Looking at the logs for APL, I noticing that this looks like same root cause
than for bug 96229:
=> vblank not available on crtc 0, ret=-22
which btw appeared in bug 89108 and was fixed on previous platforms with 

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


now is back.

Kimmo, can you have someone looking at this?

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