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drm/i915: Make wait-for-pending-flips more defensive 

Be sure to always flush a stuck pageflip even if we couldn't possibly
expect one to be there.

References: https://bugs.freedesktop.org/show_bug.cgi?id=82612
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2014-08-20 13:13:34 +01:00 committed by Daniel Vetter
parent e07f0552c6
commit 975d568ade
1 changed files with 5 additions and 7 deletions
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12
drivers/gpu/drm/i915/intel_display.c
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@ -3363,18 +3363,16 @@ void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (crtc->primary->fb == NULL)
return;
WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
WARN_ON(wait_event_timeout(dev_priv->pending_flip_queue,
!intel_crtc_has_pending_flip(crtc),
60*HZ) == 0);
mutex_lock(&dev->struct_mutex);
intel_finish_fb(crtc->primary->fb);
mutex_unlock(&dev->struct_mutex);
if (crtc->primary->fb) {
mutex_lock(&dev->struct_mutex);
intel_finish_fb(crtc->primary->fb);
mutex_unlock(&dev->struct_mutex);
}
}
/* Program iCLKIP clock to the desired frequency */