From 0c8c707f24ba2633073c1ce52ce5a8194e6b0fdd Mon Sep 17 00:00:00 2001
From: Greg Davill <greg.davill@gmail.com>
Date: Tue, 20 Oct 2020 16:38:00 +1030
Subject: [PATCH] ecp5ddrphy: Fix DELAYF initial value

I've seen intermittent failures with recent builds. I suspect it is
related to the DELAYF primitive not being correctly loaded with an
initial value. Holding LOADN LOW ensures a value is correctly
loaded.
---
 litedram/phy/ecp5ddrphy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litedram/phy/ecp5ddrphy.py b/litedram/phy/ecp5ddrphy.py
index 08b9b7f..f6b9190 100644
--- a/litedram/phy/ecp5ddrphy.py
+++ b/litedram/phy/ecp5ddrphy.py
@@ -350,7 +350,7 @@ class ECP5DDRPHY(Module, AutoCSR):
                 self.specials += [
                     Instance("DELAYF",
                         p_DEL_MODE  = "DQS_ALIGNED_X2",
-                        i_LOADN     = 1,
+                        i_LOADN     = 0,
                         i_MOVE      = 0,
                         i_DIRECTION = 0,
                         i_A         = dq_i,