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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-05-11 09:21:25 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-05-19 22:39:52 +0200 |
| commit | e7e164db6db292d6f804ec6cd25f29ff62dd0618 (patch) | |
| tree | ce7f6e532436215857ab7ba1545f1525018cacd1 /drivers/gpu/drm/i915 | |
| parent | c14f52860e9e8a6e6db65b7d10dfea7c8f82aa1e (diff) | |
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>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 1a06f97e73f..391439fa17b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -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); |