[Intel-gfx] [PATCH 07/11] 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
v4: Rebased on top of the whitelist reg refactoring (Michel)
v5: Added References (Mika)

References: HSDES#1804860157
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 | 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 e173e17..cce3e3f 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -968,6 +968,9 @@ static void icl_whitelist_build(struct whitelist *w)
 
 	/* WaAllowUMDToModifyHalfSliceChicken2:icl */
 	whitelist_reg(w, HALF_SLICE_CHICKEN2);
+
+	/* WaAllowUMDToModifyHalfSliceChicken7:icl */
+	whitelist_reg(w, GEN9_HALF_SLICE_CHICKEN7);
 }
 
 static struct whitelist *whitelist_build(struct intel_engine_cs *engine,
-- 
1.9.1