[Intel-gfx] [PATCH] drm/i915: Assert that the transcoder is indeed off before modifying it

[Chris Wilson]

Cc: Jesse Barnes <jbarnes at virtuousgeek.org>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8d55dc9..12dba60 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2878,6 +2878,8 @@ 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);
 
-- 
1.7.10