Re: [PATCH] drm/i915/bdw: Don't allow the FBC base to be 0

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On Fri, May 02, 2014 at 11:19:27AM +0300, Ville Syrjälä wrote:
> On Thu, May 01, 2014 at 06:47:54PM -0700, Ben Widawsky wrote:
> > "Restriction :
> > The offset must be greater than 4K bytes, avoiding the first 4KB of
> > stolen memory."
> 
> Isn't this a more generic issue that we must avoid the first 4k? If so
> I think we should just reserve the first 4k permanently at driver init
> time.

What? On many machines the vga framebuffer is allocated from offset 0. I
think some explanation is in order.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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