[Intel-gfx] [PATCH 09/22] drm/i915/icl: WaSendPushConstantsFromMMIO

[Oscar Mateo]

Allows UMDs to set 'Disable Gather at Set Shader Common Slice'.

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...

v2: Rebased

Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/intel_engine_cs.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index eb2f46e..884df09 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1470,6 +1470,7 @@ static int cfl_init_workarounds(struct intel_engine_cs *engine)
 static int icl_init_workarounds(struct intel_engine_cs *engine)
 {
 	struct drm_i915_private *dev_priv = engine->i915;
+	int ret;
 
 	/* Wa_1604370585:icl (pre-prod)
 	 * Formerly known as WaPushConstantDereferenceHoldDisable
@@ -1494,6 +1495,11 @@ static int icl_init_workarounds(struct intel_engine_cs *engine)
 		WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
 				  GEN11_TDL_CLOCK_GATING_FIX_DISABLE);
 
+	/* WaSendPushConstantsFromMMIO:icl */
+	ret = wa_ring_whitelist_reg(engine, COMMON_SLICE_CHICKEN2);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
-- 
1.9.1