[Intel-gfx] [PATCH] drm/i915/icl: Document Wa_1606682166

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Commit 71ffd49cc9b9 ("drm/i915/icl:Add Wa_1606682166") added the
workaround but did not put it in comment, which looks like should be the
usual process for these things. Add the missing comment.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
Cc: Anuj Phogat <anuj.phogat at gmail.com>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_workarounds.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index 4f678c502daf..7c4c5e655d94 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -1178,7 +1178,10 @@ static void rcs_engine_wa_init(struct intel_engine_cs *engine)
 			    PMFLUSH_GAPL3UNBLOCK |
 			    PMFLUSHDONE_LNEBLK);
 
-		/* Wa_1406609255:icl (pre-prod) */
+		/*
+		 * Wa_1406609255:icl (pre-prod): GEN7_DISABLE_DEMAND_PREFETCH
+		 * Wa_1606682166:icl: GEN7_DISABLE_SAMPLER_PREFETCH
+		 */
 		if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0))
 			wa_write_or(wal,
 				    GEN7_SARCHKMD,
-- 
2.19.1