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drm/i915: Disable RCS flips on Ivybridge

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We currently see random GPU hangs when using RCS flips with multiple
pipes on Ivybridge. Now that we have mmio flips, we can fairly cheaply
fallback to using CPU driven flips instead.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77104
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2014-07-08 10:40:29 +01:00 committed by Daniel Vetter
parent 78382593e9
commit 2a92d5bca1
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/i915/intel_display.c
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@ -9658,6 +9658,8 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
if (IS_VALLEYVIEW(dev)) {
ring = &dev_priv->ring[BCS];
} else if (IS_IVYBRIDGE(dev)) {
ring = &dev_priv->ring[BCS];
} else if (INTEL_INFO(dev)->gen >= 7) {
ring = obj->ring;
if (ring == NULL || ring->id != RCS)