From f2074542a16b229f807e03fa773a046ed72255fc Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Sat, 2 Feb 2019 23:14:30 +0100
Subject: [PATCH] sdram_init/ddr4: set data mask enable bit

---
 litedram/sdram_init.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litedram/sdram_init.py b/litedram/sdram_init.py
index 86ceffc..88b61a8 100644
--- a/litedram/sdram_init.py
+++ b/litedram/sdram_init.py
@@ -320,7 +320,7 @@ def get_sdram_phy_init_sequence(phy_settings, timing_settings):
         mr2 = format_mr2(cwl, z_to_rtt_wr[rtt_wr])
         mr3 = 0
         mr4 = 0
-        mr5 = 0
+        mr5 = 1 << 10 # data mask enable
         mr6 = format_mr6(4) # FIXME: tCCD
 
         init_sequence = [