From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
So I accidentally looked at gen6_init_clock_gating() and noticed a few
weird things that should have gotten cleaned up years ago. So I did that.
While doing that I also noticed the WIZ hashing bits, and the fact that
we weren't following the BSpec recommendation. After doing a few tests
on IVB and HSW it looks 16x4 is in fact the best option, 8x4 was second
best and 8x8 (our current default for !SNB) was the worst. I didn't see
much (if any) difference w/o MSAA, but w/ MSAA 4x there was some change.
I used xonotic as my benchmark.
Ville Syrjälä (7):
drm/i915: Fix SNB GT_MODE register setup
drm/i915: Assume we implement
WaStripsFansDisableFastClipPerformanceFix:snb
drm/i915: There's no need to mask all 3D_CHICKEN bits on SNB
drm/i915: Disable SF pipelined attribute fetch for SNB
drm/i915: Change IVB WIZ hashing mode to 16x4
drm/i915: Change HSW WIZ hashing mode to 16x4
drm/i915: Change BDW WIZ hashing mode to 16x4
drivers/gpu/drm/i915/i915_reg.h | 10 +++++++--
drivers/gpu/drm/i915/intel_pm.c | 47 ++++++++++++++++++++++++++++++++++-------
2 files changed, 47 insertions(+), 10 deletions(-)
--
1.8.3.2
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