[Intel-gfx] [PATCH 11/22] drm/i915/icl: WaAllowUMDToModifyHalfSliceChicken7

[Oscar Mateo]

Required to dinamically set 'Trilinear Filter Quality Mode'

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: For whatever reason, this ended up in KBL (??!!)

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 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index ada80c1..7fb7283 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1505,6 +1505,11 @@ static int icl_init_workarounds(struct intel_engine_cs *engine)
 	if (ret)
 		return ret;
 
+	/* WaAllowUMDToModifyHalfSliceChicken7:icl */
+	ret = wa_ring_whitelist_reg(engine, GEN9_HALF_SLICE_CHICKEN7);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
-- 
1.9.1