[Mesa-dev] [PATCH 7/9] i965: Add mask_control_ex field and handle it in compaction.

[Matt Turner]

On Wed, Oct 21, 2015 at 12:50 AM, Matt Turner <mattst88 at gmail.com> wrote:
> I've got a snapshot of the internal BSpec as PDFs that still has
> useful Ironlake information, and that's where the "NoCMask"
> information comes from. The G45 docs simply say that 0b11 is
> "Reserved", but it's unclear whether that's actually true or if they
> made *another* mistake. :)

I meant to say -- because the G45 docs actually say

"[DevBW, DevCL] NoCMask is not supported."

but don't tell you which bit combination of MaskControl/MaskControlEx
is NoCMask.

I think they probably made a mistake in the scrubbing process and it
actually exists on G45.