[Intel-gfx] [PATCH 08/16] drm/i915: avoid the last 8mb of stolen on BDW/SKL

[Chris Wilson]

On Fri, Aug 14, 2015 at 06:34:13PM -0300, Paulo Zanoni wrote:
> The FBC hardware for these platforms doesn't have access to the
> bios_reserved range, so it always assumes the maximum (8mb) is used.
> So avoid this range while allocating.
> 
> This solves a bunch of FIFO underruns that happen if you end up
> putting the CFB in that memory range. On my machine, with 32mb of
> stolen, I need a 2560x1440 mode for that.

If the restriction applies only to FBC, apply it to only fbc.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre