On SNB we set up WaSetupGtModeTdRowDispatch:snb early in gen6_init_clock_gating(). That sets a bit in the GEN6_GT_MODE register. However later we go and disable all the bits in the same register. And then we go on to set some other bit. So apparently we never actually implemented this workaround since the "disable all bits" part was there already before the w/a got supposedly implemented. These are the relevant commits: commit |
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Makefile |