[Intel-gfx] [PATCH 27/43] drm/i915: flush overlay regfile writes

[Chris Wilson]

On Wed, 14 Dec 2011 13:57:24 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> Better be paranoid. The wmb should flush the wc writes, and
> the chipset_flush hopefully flushes any mch buffers. There've been a
> few overlay hangs I've never really diagnosed, unfortunately all the
> reporters disappeared.

At which point we should just put the darn wmb into i830_chipset_flush()
and make snark remarks about wbinvd.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre