[Intel-gfx] [PATCH] drm/i915: Fix context size calculation on SNB/IVB/VLV

[Ben Widawsky]

On Thu, Aug 22, 2013 at 07:23:13PM +0300, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> All the different context sizes reported in the CXT_SIZE register
> aren't meant to be simply added together.
> 
> While BSpec is somewhat unclear on the topic of the actual context
> size, empirical tests have now revealed the truth. So let's add a
> big fat comment to remind people how it all works.
> 
> As a result of correctly interpreting CXT_SIZE, the IVB context
> size is reduced from three pages to two, while SNB context size
> remains at two pages.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Acked-by: Ben Widawsky <ben at bwidawsk.net>

[snip]

-- 
Ben Widawsky, Intel Open Source Technology Center