When converting this to the new wait_for macro I inverted the wait
condition, which causes all sorts of problems.  So correct it to fix
several failures caused by the bad wait (flickering, bad output
detection, tearing, etc.).

Reviewed-by: Chris Wilson <[email protected]>
Tested-by: Sitsofe Wheeler <[email protected]>
Signed-off-by: Jesse Barnes <[email protected]>
---
 drivers/gpu/drm/i915/intel_display.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 6ccb797..dd90b80 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -992,7 +992,7 @@ void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 
        /* Wait for vblank interrupt bit to set */
        if (wait_for((I915_READ(pipestat_reg) &
-                     PIPE_VBLANK_INTERRUPT_STATUS) == 0,
+                     PIPE_VBLANK_INTERRUPT_STATUS),
                     50, 0))
                DRM_DEBUG_KMS("vblank wait timed out\n");
 }
-- 
1.6.3.3

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