[Intel-gfx] [PATCH 20/22] 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 (??!!)
v3: Rebased on top of the WA refactoring

Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/intel_workarounds.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index 43dbeed..8a76bc4 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -968,6 +968,11 @@ static int icl_whitelist_workarounds_apply(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