[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 #5 from Rafael Ristovski <rafael.ristovski at gmail.com> ---
(In reply to Chris Wilson from comment #4)
> 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;

Can confirm this fixes the issue.

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