[Intel-gfx] [PATCH 10/11] drm/i915/icl: WaEnablePreemptionGranularityControlByUMD

[Oscar Mateo]

Apparently HW did not whitelist this register properly.

Do Linux UMDs make use of this? This change has been security
reviewed and the whitelisting approved. Virtualization of other
OSes could certainly use it.

References: HSDES#1305642430
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 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 912f8b5..474e498 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -978,6 +978,9 @@ static void icl_whitelist_build(struct whitelist *w)
 
 	/* WaAllowUMDToModifySamplerMode:icl */
 	whitelist_reg(w, GEN10_SAMPLER_MODE);
+
+	/* WaEnablePreemptionGranularityControlByUMD:icl */
+	whitelist_reg(w, GEN8_CS_CHICKEN1);
 }
 
 static struct whitelist *whitelist_build(struct intel_engine_cs *engine,
-- 
1.9.1