tree ce7f6e532436215857ab7ba1545f1525018cacd1
parent c14f52860e9e8a6e6db65b7d10dfea7c8f82aa1e
author Chris Wilson <chris@chris-wilson.co.uk> 1336724485 +0100
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1337459992 +0200

drm/i915: Assert that the transcoder is indeed off before modifying it

Inspired by a recent regression that seems to confuse pch transcoder
state, let's be a bit more paranoid.

References: https://bugs.freedesktop.org/show_bug.cgi?id=49712
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Pimped commit message.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>