[Bug 79354] [BDW bisected]igt/kms_flip subcases cause "WARNING: CPU: 0 PID: 4846 at drivers/gpu/drm/i915/intel_display.c:3315 intel_crtc_wait_for_pending_flips+0xe6/0x13a [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79354

--- Comment #8 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Created attachment 101610
  --> https://bugs.freedesktop.org/attachment.cgi?id=101610&action=edit
[PATCH] drm/i915: Wait for vblank after enabling the primary plane on BDW

Looks like this turned out to be a bdw specific issue after all. The flip done
interrupt seems to a bit broken on bdw. This patch should cure it.

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