[Intel-gfx] Flicker-free boot in DRM

[Keith Packard]

On Mon, 31 Oct 2011 09:57:26 -0700, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:

> Easier to just copy the contents out of the current framebuffer into a
> new one before flipping to the new buffer.

I'm not excited about doing the copy, but I don't see a better plan --
we want to be able to use stolen memory for other things, but we can't
do that while scanout is happening.

> I think that's already possible if we don't use the helper function for
> mode setting.

I'd like to avoid duplicating all of that logic down in every driver, of
course, so finding a simple way to give the driver a bit more control
seems like a reasonable compromise.

-- 
keith.packard at intel.com
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