MLK-21219 plat: imx8m: fix the ddr4 retention hang
Fix the ddr4 retention exit hang caused by improper
init flow.
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
(cherry picked from commit ae126e71754c9c1ff758d2b12ff74e3d3f5680b9)
diff --git a/plat/imx/common/imx8m/ddr4_retention.c b/plat/imx/common/imx8m/ddr4_retention.c
index b0f49b6..3b469f5 100644
--- a/plat/imx/common/imx8m/ddr4_retention.c
+++ b/plat/imx/common/imx8m/ddr4_retention.c
@@ -144,6 +144,7 @@
mmio_clrbits_32(DDRC_DFIMISC(0), 1);
mmio_write_32(SRC_DDRC_RCR_ADDR, 0x8F000004);
mmio_write_32(SRC_DDRC_RCR_ADDR, 0x8F000000); /* release all reset */
+ mmio_write_32(DDRC_DBG1(0), 0x00000000);
/* restore the ddr phy config */
dram_phy_init();
