From df99cc66e8273b0ea9cf5860d46dd4922f99c88a Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Mon, 2 Jul 2018 14:12:27 +0200
Subject: [PATCH] bios/sdram: also check for last read of scan to choose
 optimal window

---
 litex/soc/software/bios/sdram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litex/soc/software/bios/sdram.c b/litex/soc/software/bios/sdram.c
index b0e741611..cd1894243 100644
--- a/litex/soc/software/bios/sdram.c
+++ b/litex/soc/software/bios/sdram.c
@@ -422,7 +422,7 @@ static int read_level_scan(int silent)
 				if(MMPTR(sdram_dfii_pix_rddata_addr[p]+4*(i+DFII_PIX_DATA_SIZE/2)) != prs[DFII_PIX_DATA_SIZE*p+i+DFII_PIX_DATA_SIZE/2])
 					working = 0;
 			}
-			if (j == 0)
+			if ((j == 0) || (j == (ERR_DDRPHY_DELAY-1)))
 				/* to have an optimal scan, first tap should not be working */
 				optimal &= (working == 0);
 			if (!silent)