From cc8223ee57aacdd0a7787b22f0ac5ee738124fa8 Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Thu, 6 Oct 2022 10:38:58 +0200
Subject: [PATCH] Do not (yet) register ref_sync.

---
 libraries/base/dp/src/vhdl/dp_bsn_monitor_v2.vhd | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libraries/base/dp/src/vhdl/dp_bsn_monitor_v2.vhd b/libraries/base/dp/src/vhdl/dp_bsn_monitor_v2.vhd
index 8670721cbb..452e97f76a 100644
--- a/libraries/base/dp/src/vhdl/dp_bsn_monitor_v2.vhd
+++ b/libraries/base/dp/src/vhdl/dp_bsn_monitor_v2.vhd
@@ -170,7 +170,12 @@ BEGIN
   latency   <= cnt_latency;
 
   -- Register ref_sync to ease timing closure for ref_sync fanout to (many) dp_bsn_monitor_v2 instances
-  ref_sync_reg <= ref_sync WHEN rising_edge(clk);
+  -- TODO if needed:
+  --   Registering ref_sync assumes ref_sunc occurs before in_sosi.sync. When ref_sync = in_sosi.sync,
+  --   then also the impact of registering ref_sync with respect to in_sosi and in_siso needs to be
+  --   verified.
+  --ref_sync_reg <= ref_sync WHEN rising_edge(clk);
+  ref_sync_reg <= ref_sync;
 
   u_sync_timeout_cnt : ENTITY common_lib.common_counter
   GENERIC MAP (
-- 
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