fix(imx8m): backup mr12/14 value from lpddr4 chip
Backup the mr12/14 value as the actual value used is not the
one we configured in the ddrc config timing.
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Change-Id: If04733b34a3b4c080828bb7c82e83f0badbeaafd
diff --git a/plat/imx/imx8m/ddr/dram.c b/plat/imx/imx8m/ddr/dram.c
index 60185d7..4a9f4ee 100644
--- a/plat/imx/imx8m/ddr/dram.c
+++ b/plat/imx/imx8m/ddr/dram.c
@@ -30,6 +30,39 @@
{ DDRC_FREQ2_INIT3(0), DDRC_FREQ2_INIT4(0), DDRC_FREQ2_INIT6(0), DDRC_FREQ2_INIT7(0) },
};
+#if defined(PLAT_imx8mp)
+static uint32_t lpddr4_mr_read(unsigned int mr_rank, unsigned int mr_addr)
+{
+ unsigned int tmp, drate_byte;
+
+ tmp = mmio_read_32(DRC_PERF_MON_MRR0_DAT(0));
+ mmio_write_32(DRC_PERF_MON_MRR0_DAT(0), tmp | 0x1);
+ do {
+ tmp = mmio_read_32(DDRC_MRSTAT(0));
+ } while (tmp & 0x1);
+
+ mmio_write_32(DDRC_MRCTRL0(0), (mr_rank << 4) | 0x1);
+ mmio_write_32(DDRC_MRCTRL1(0), (mr_addr << 8));
+ mmio_write_32(DDRC_MRCTRL0(0), (mr_rank << 4) | BIT(31) | 0x1);
+
+ /* Workaround for SNPS STAR 9001549457 */
+ do {
+ tmp = mmio_read_32(DDRC_MRSTAT(0));
+ } while (tmp & 0x1);
+
+ do {
+ tmp = mmio_read_32(DRC_PERF_MON_MRR0_DAT(0));
+ } while (!(tmp & 0x8));
+ tmp = mmio_read_32(DRC_PERF_MON_MRR1_DAT(0));
+
+ drate_byte = (mmio_read_32(DDRC_DERATEEN(0)) >> 4) & 0xff;
+ tmp = (tmp >> (drate_byte * 8)) & 0xff;
+ mmio_write_32(DRC_PERF_MON_MRR0_DAT(0), 0x4);
+
+ return tmp;
+}
+#endif
+
static void get_mr_values(uint32_t (*mr_value)[8])
{
uint32_t init_val;
@@ -41,6 +74,13 @@
mr_value[fsp_index][2*i] = init_val >> 16;
mr_value[fsp_index][2*i + 1] = init_val & 0xFFFF;
}
+
+#if defined(PLAT_imx8mp)
+ if (dram_info.dram_type == DDRC_LPDDR4) {
+ mr_value[fsp_index][5] = lpddr4_mr_read(1, MR12); /* read MR12 from DRAM */
+ mr_value[fsp_index][7] = lpddr4_mr_read(1, MR14); /* read MR14 from DRAM */
+ }
+#endif
}
}
diff --git a/plat/imx/imx8m/imx8mp/include/platform_def.h b/plat/imx/imx8m/imx8mp/include/platform_def.h
index 14cb709..1281270 100644
--- a/plat/imx/imx8m/imx8mp/include/platform_def.h
+++ b/plat/imx/imx8m/imx8mp/include/platform_def.h
@@ -1,5 +1,5 @@
/*
- * Copyright 2020-2022 NXP
+ * Copyright 2020-2023 NXP
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -112,7 +112,7 @@
#define IMX_DDRC_BASE U(0x3d400000)
#define IMX_DDRPHY_BASE U(0x3c000000)
#define IMX_DDR_IPS_BASE U(0x3d000000)
-#define IMX_DDR_IPS_SIZE U(0x1800000)
+#define IMX_DDR_IPS_SIZE U(0x1900000)
#define IMX_ROM_BASE U(0x0)
#define IMX_ROM_SIZE U(0x40000)
#define IMX_NS_OCRAM_BASE U(0x900000)
diff --git a/plat/imx/imx8m/include/dram.h b/plat/imx/imx8m/include/dram.h
index e8caa21..719c390 100644
--- a/plat/imx/imx8m/include/dram.h
+++ b/plat/imx/imx8m/include/dram.h
@@ -23,6 +23,9 @@
#define DDRC_ACTIVE_ONE_RANK U(0x1)
#define DDRC_ACTIVE_TWO_RANK U(0x2)
+#define MR12 U(12)
+#define MR14 U(14)
+
#define MAX_FSP_NUM U(3)
/* reg & config param */