A recommended tuning setting for both gen12 and Xe_HP platforms requires that we grant userspace r/w access to the COMMON_SLICE_CHICKEN3 register.
Bspec: 73993, 73994, 31870, 68331 Cc: Dongwon Kim <[email protected]> Signed-off-by: Matt Roper <[email protected]> --- The bspec update to add COMMON_SLICE_CHICKEN3 to the tuning guide pages is still pending at the moment, but should be finalized shortly. drivers/gpu/drm/i915/gt/intel_workarounds.c | 25 ++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index 1ef9c9fa2eff..0444c715998a 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -2194,6 +2194,10 @@ static void tgl_whitelist_build(struct intel_engine_cs *engine) /* Wa_1806527549:tgl */ whitelist_reg(w, HIZ_CHICKEN); + + /* Required by recommended tuning setting (not a workaround) */ + whitelist_reg(w, GEN11_COMMON_SLICE_CHICKEN3); + break; default: break; @@ -2227,6 +2231,9 @@ static void dg2_whitelist_build(struct intel_engine_cs *engine) RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4); + /* Required by recommended tuning setting (not a workaround) */ + whitelist_mcr_reg(w, XEHP_COMMON_SLICE_CHICKEN3); + break; case COMPUTE_CLASS: /* Wa_16011157294:dg2_g10 */ @@ -2264,6 +2271,22 @@ static void pvc_whitelist_build(struct intel_engine_cs *engine) blacklist_trtt(engine); } +static void mtl_whitelist_build(struct intel_engine_cs *engine) +{ + struct i915_wa_list *w = &engine->whitelist; + + switch (engine->class) { + case RENDER_CLASS: + /* Required by recommended tuning setting (not a workaround) */ + whitelist_mcr_reg(w, XEHP_COMMON_SLICE_CHICKEN3); + + break; + default: + break; + } + +} + void intel_engine_init_whitelist(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; @@ -2272,7 +2295,7 @@ void intel_engine_init_whitelist(struct intel_engine_cs *engine) wa_init_start(w, engine->gt, "whitelist", engine->name); if (IS_METEORLAKE(i915)) - ; /* noop; none at this time */ + mtl_whitelist_build(engine); else if (IS_PONTEVECCHIO(i915)) pvc_whitelist_build(engine); else if (IS_DG2(i915)) -- 2.39.1
