From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Mon, 2 Jul 2018 12:12:27 +0000 (+0200)
Subject: bios/sdram: also check for last read of scan to choose optimal window
X-Git-Tag: 24jan2021_ls180~1691
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=df99cc66e8273b0ea9cf5860d46dd4922f99c88a;p=litex.git

bios/sdram: also check for last read of scan to choose optimal window
---

diff --git a/litex/soc/software/bios/sdram.c b/litex/soc/software/bios/sdram.c
index b0e74161..cd189424 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)