[Intel-gfx] [PATCH] drm/i915: Set stolen reserved to 0 for pre-g4x platforms

[Chris Wilson]

On Fri, Sep 11, 2015 at 09:14:29PM +0300, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> This stolen reserved stuff was introduced on g4x, so no need to waste
> stolen on older platforms. Unfortunately configdb is no more so I can't
> look up the right way to detect this stuff. I do have one hint as to
> where the register might be on ctg, but I don't have a ctg to test it,
> and on the elk I have here it doesn't contain sensible looking data.
> For ilk grits suggegsts it might be in the same place as on snb (the
> original PCI reg, not the mirror) but I can't be entirely sure about it
> The register shows a round zero on my ilk.
> 
> So when there's no really good data for any of these platforms leave the
> current "assume 1MiB" approach in place.
> 
> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

The early platforms definitely do not have the feature for which the
stolen was reserved for. 

Acked-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre