On 05/06/2013 09:02 PM, Eric Anholt wrote:
The constant packets for gen6 are too small for gen7, and while IVB seems
happy with them HSW blows up. Just restore the HSW path to what it was
before the gen6 change, by making gen7-specific functions to set up these
stages.
---
The alternative here would be to emit the correct lengths of packets
in these new functions. But we're not emitting constants for other
disabled stages on gen7+, so I'm leaning toward this variant.
Actually, we are in the normal state upload path: gen7_disable_stages
emits zero-filled 3DSTATE_CONSTANT_GS/HS/DS packets. Given the hangs on
Sandybridge, I think it'd be best to explicitly disable them all in
blorp too. It's definitely the safest approach, and not a ton of code.
--Ken
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