[Bug 94980] [HSW xf86-video-intel] 2D acceleration slows to a crawl from 4.4.6 -> 4.5

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94980

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
Suggestion by Maarten:

diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 36e7e29ea266..385095f725a8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13160,6 +13160,9 @@ static int intel_atomic_prepare_commit(struct
drm_device *dev,
        }

        for_each_crtc_in_state(state, crtc, crtc_state, i) {
+               if (state->legacy_cursor_update)
+                       continue;
+
                ret = intel_crtc_wait_for_pending_flips(crtc);
                if (ret)
                        return ret;

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