bios/sdram: reduce write leveling scan range

diff --git a/litex/soc/software/bios/sdram.c b/litex/soc/software/bios/sdram.c
index 383cc3ef41bda49767267e94508ed1722aeb674e..b00f615e4aadf2bf62eb25dc6ffe0c454cc96de6 100644 (file)
--- a/litex/soc/software/bios/sdram.c
+++ b/litex/soc/software/bios/sdram.c
@@ -253,7 +253,7 @@ int write_level(void)
 
     int ok;
 
-       err_ddrphy_wdly = ERR_DDRPHY_DELAY - ddrphy_half_sys8x_taps_read() - 1;
+       err_ddrphy_wdly = (ERR_DDRPHY_DELAY*14)/16 - ddrphy_half_sys8x_taps_read();
 
        printf("Write leveling:\n");