[Intel-gfx] [PATCH 2/2] drm/i915/icl: Apply WaEnablePreemptionGranularityControlByUMD

[Michał Winiarski]

There are still some cases where userspace needs to change the
preemption granularity for compute workloads. Let's whitelist the
per-ctx granularity control register to allow it.

Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
Cc: Anuj Phogat <anuj.phogat at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Rafael Antognolli <rafael.antognolli at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_workarounds.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index 2fba33509f4e..582f554e53f4 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -1053,6 +1053,9 @@ static void icl_whitelist_build(struct i915_wa_list *w)
 
 	/* WaAllowUMDToModifySamplerMode:icl */
 	whitelist_reg(w, GEN10_SAMPLER_MODE);
+
+	/* WaEnablePreemptionGranularityControlByUMD:icl */
+	whitelist_reg(w, GEN8_CS_CHICKEN1);
 }
 
 void intel_engine_init_whitelist(struct intel_engine_cs *engine)
-- 
2.20.1