Commit e7e164db authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter
Browse files

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: default avatarChris Wilson <chris@chris-wilson.co.uk>
[danvet: Pimped commit message.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent c14f5286
......@@ -2782,6 +2782,8 @@ static void ironlake_pch_enable(struct drm_crtc *crtc)
int pipe = intel_crtc->pipe;
u32 reg, temp;
assert_transcoder_disabled(dev_priv, pipe);
/* For PCH output, training FDI link */
dev_priv->display.fdi_link_train(crtc);
......
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