[Intel-gfx] [PATCH 1/3] drm/i915: Fix MI_DISPLAY_FLIP plane select offset on Ivybridge.

[Keith Packard]

On Tue, 07 Jun 2011 17:55:05 -0700, Kenneth Graunke <kenneth at whitecape.org> wrote:

> In the latest version of the Render Engine Command Streamer chapter, 
> 18:8 are 'reserved' on IVB.  Perhaps you have an old copy?

Yeah, I haven't sync'd for a week or so.

> Apparently MI_DISPLAY_FLIP also exists in the Blitter Engine on IVB.  I 
> suspect we actually need to use that, but I haven't tried to yet.

> No, actually...page flips are still broken.  I suspect this patch is 
> necessary but insufficient.  Feel free to hold off on merging it.

Sounds like a bit more testing and fixing is required; I'll leave things
alone until we know how to make it work.

> Good question.  My reading of the docs say that it should be 3 DWORDs on 
> SNB as well; this code was directly lifted from "case 6" above (save the 
> first line).

Might be interesting to see if page flipping works when we send the
command correctly :-)

-- 
keith.packard at intel.com
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