In the null state batch, we try to load the CC_STATE_POINTERS, but pass
in a pointer to invalid state for the color-calc and depth-stencil
state. In the rendercopy batch this was imported from, the 1024 offset
used is known to be 64bytes of zeroes. Tweaking the
gen6_null_state_batch to point those two offset at known zeroes however
was not sufficient.
The effect of loading depth-stencil and color-calc causes the golden
renderstate batch to take 10s (yes, ten seconds) on my snb gt1 (i5-2500).
It would be nice if we could drop this incomplete "golden render state"
entirely.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_renderstate_gen6.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_renderstate_gen6.c b/drivers/gpu/drm/i915/intel_renderstate_gen6.c
index 11c8e7b3dd7c..46cfc405ca30 100644
--- a/drivers/gpu/drm/i915/intel_renderstate_gen6.c
+++ b/drivers/gpu/drm/i915/intel_renderstate_gen6.c
@@ -107,8 +107,8 @@ static const u32 gen6_null_state_batch[] = {
0x00000000,
0x780e0002,
0x00000441,
- 0x00000401,
- 0x00000401,
+ 0x00000400,
+ 0x00000400,
0x78021002,
0x00000000,
0x00000000,
--
2.13.3
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