diff --git a/litex/soc/software/liblitedram/sdram.c b/litex/soc/software/liblitedram/sdram.c
index e6653da02..a8802efb5 100644
--- a/litex/soc/software/liblitedram/sdram.c
+++ b/litex/soc/software/liblitedram/sdram.c
@@ -876,8 +876,9 @@ int sdrinit(void)
 
 #if CSR_DDRPHY_RST_ADDR
 	ddrphy_rst_write(1);
-	cdelay(100);
+	cdelay(1000);
 	ddrphy_rst_write(0);
+	cdelay(1000);
 #endif
 
 #ifdef CSR_DDRCTRL_BASE