[Intel-gfx] [PATCH v2 6/6] drm/i915: Add Wa_1605460711 / Wa_1408767742 to ICL and EHL

[Matt Roper]

This workaround appears under two different numbers (and with somewhat
confused stepping applicability on ICL).  Ultimately it appears we
should just implement this for all stepping of ICL and EHL.

Note that this is identical to Wa_1407928979:tgl that already exists in
our driver too...yet another number referencing the same actual
workaround.

Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index cbfc8d5ebb3e..5176ad1a3976 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1487,6 +1487,14 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 		wa_write_or(wal,
 			    SUBSLICE_UNIT_LEVEL_CLKGATE,
 			    GWUNIT_CLKGATE_DIS);
+
+		/*
+		 * Wa_1408767742:icl[a2..forever],ehl[all]
+		 * Wa_1605460711:icl[a0..c0]
+		 */
+		wa_write_or(wal,
+			    GEN7_FF_THREAD_MODE,
+			    GEN12_FF_TESSELATION_DOP_GATE_DISABLE);
 	}
 
 	if (IS_GEN_RANGE(i915, 9, 12)) {
-- 
2.24.1