This patch series adds support for the "Compressed Multisample
Surface" layout, which should speed up multisample rendering on Gen7
by decreasing memory bandwidth requirements.
Patches 1-2 do preparatory refactoring, including creating a function
to determine which MSAA layout should be used based on chipset
capabilities. Initially CMS layout is not switched on, so these
patches should not produce any functional change.
Patch 3 adds code to create the MCS buffer (an auxiliary buffer the
hardware uses to keep track of the state of compression when CMS is in
use). Patches 4-5 ensure that the state of the MCS buffer is properly
communicated to the hardware when CMS is in use. Patches 6-7 update
blorp to properly account for the CMS layout when doing blits. These
patches should not produce any functional change either, since CMS
layout is still switched off.
Finally, patch 8 switches on CMS layout for hardware/format
combinations that support it (Gen7 supports it on all formats except
signed integer).
No piglit regressions on Gen6 or Gen7.
[PATCH 1/8] i965/msaa: Move {rt,tex}_interleaved into blorp program key.
[PATCH 2/8] i965/msaa: Add an enum to describe MSAA layout.
[PATCH 3/8] i965/msaa: Allocate MCS buffer when CMS MSAA is in use.
[PATCH 4/8] i965/msaa: Add CMS MSAA settings to brw_structs.h.
[PATCH 5/8] i965/msaa: Set SURFACE_STATE properly when CMS MSAA is in use.
[PATCH 6/8] i965/msaa: Add CMS-related sampler messages to brw_defines.h
[PATCH 7/8] i965/msaa: Add CMS support to blorp.
[PATCH 8/8] i965/msaa: Enable CMS layout on Gen7 for the formats that support
it.
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