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| author |   Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-09-06 15:03:25 -0700 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-09-06 15:04:11 -0700 |
| commit | aa9f4c4f19131e05323d0d5a068ccb46058e8257 (patch) | |
| tree | e9efb06710f22b0400d3c335684a6bdd52fdf32c /drivers/gpu/drm/i915/intel_engine_cs.c | |
| parent | drm/i915: Lift has-pinned-pages assert to caller of ____i915_gem_object_get_pages (diff) | |
| download | linux-dev-aa9f4c4f19131e05323d0d5a068ccb46058e8257.tar.xz linux-dev-aa9f4c4f19131e05323d0d5a068ccb46058e8257.zip | |
drm/i915/cnl: WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod)
Wa for B-stepping only.
A for a hang issue that requires throttling EU performace
to 12.5% to avoid back pressure to thread dispatch
v2: Rebased. No change from v1.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170906220325.24524-1-rodrigo.vivi@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_engine_cs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_engine_cs.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index 23812ec23969..b8e9a234af2d 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -1079,6 +1079,10 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine) WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0, HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT); + /* WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod) */ + if (IS_CNL_REVID(dev_priv, CNL_REVID_B0, CNL_REVID_B0)) + WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, THROTTLE_12_5); + /* WaDisableReplayBufferBankArbitrationOptimization:cnl */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); |