From: Jeff McGee <jeff.mcgee@xxxxxxxxx> The WA applies to all production Gen9 and requires both enabling and whitelisting of the per-context preemption control register. v2: Extend to Cannonlake. Signed-off-by: Jeff McGee <jeff.mcgee@xxxxxxxxx> Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_engine_cs.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index e804a9b816f1..6245970eb3ab 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -1075,8 +1075,10 @@ static int gen9_init_workarounds(struct intel_engine_cs *engine) if (ret) return ret; - /* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl */ - ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1); + /* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */ + I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1, + _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL)); + ret = wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1); if (ret) return ret; @@ -1138,14 +1140,6 @@ static int skl_init_workarounds(struct intel_engine_cs *engine) if (ret) return ret; - /* - * Actual WA is to disable percontext preemption granularity control - * until D0 which is the default case so this is equivalent to - * !WaDisablePerCtxtPreemptionGranularityControl:skl - */ - I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1, - _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL)); - /* WaEnableGapsTsvCreditFix:skl */ I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE)); @@ -1278,6 +1272,8 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine) WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, CNL_FAST_ANISO_L1_BANKING_FIX); /* WaEnablePreemptionGranularityControlByUMD:cnl */ + I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1, + _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL)); ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1); if (ret) return ret; -- 2.14.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
