[PATCH 4/4] arm64: imx8mp: Add 4G 1r DRAM timings on DH i.MX8MP DHCOM SoM
Marek Vasut
marex at nabladev.com
Wed Apr 1 21:15:56 CEST 2026
Introduce timing patch which converts 2 GiB DRAM timings to 4 GiB 1-rank
timings. This is a new configuration which carries IS43LQ32K01B DRAM part.
The 512 MiB SoM strapping that was never used is repurposed for this part.
Signed-off-by: Marek Vasut <marex at nabladev.com>
---
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: u-boot at dh-electronics.com
Cc: u-boot at lists.denx.de
---
board/dhelectronics/dh_imx8mp/lpddr4_timing.h | 3 +-
.../dh_imx8mp/lpddr4_timing_2G_32.c | 138 ++++++++++++++++++
board/dhelectronics/dh_imx8mp/spl.c | 4 +-
3 files changed, 142 insertions(+), 3 deletions(-)
diff --git a/board/dhelectronics/dh_imx8mp/lpddr4_timing.h b/board/dhelectronics/dh_imx8mp/lpddr4_timing.h
index ef899dc0678..5dc841a7f5a 100644
--- a/board/dhelectronics/dh_imx8mp/lpddr4_timing.h
+++ b/board/dhelectronics/dh_imx8mp/lpddr4_timing.h
@@ -7,7 +7,7 @@
#define __LPDDR4_TIMING_H__
static const u16 dh_imx8mp_dhcom_dram_size[] = {
- 512, 1024, 1536, 2048, 3072, 4096, 6144, 8192
+ 4096, 1024, 1536, 2048, 3072, 4096, 6144, 8192
};
extern struct dram_timing_info dh_imx8mp_dhcom_dram_timing_16g_x32;
@@ -15,6 +15,7 @@ static __maybe_unused struct dram_timing_info *dh_imx8mp_dhcom_dram_timing =
&dh_imx8mp_dhcom_dram_timing_16g_x32;
void dh_imx8mp_dhcom_dram_patch_16g_x32_to_16g_x32(void);
void dh_imx8mp_dhcom_dram_patch_16g_x32_to_32g_x32_2r(void);
+void dh_imx8mp_dhcom_dram_patch_16g_x32_to_32g_x32_1r(void);
u8 dh_get_memcfg(void);
diff --git a/board/dhelectronics/dh_imx8mp/lpddr4_timing_2G_32.c b/board/dhelectronics/dh_imx8mp/lpddr4_timing_2G_32.c
index f93b3082b63..9574e920352 100644
--- a/board/dhelectronics/dh_imx8mp/lpddr4_timing_2G_32.c
+++ b/board/dhelectronics/dh_imx8mp/lpddr4_timing_2G_32.c
@@ -1910,3 +1910,141 @@ void dh_imx8mp_dhcom_dram_patch_16g_x32_to_32g_x32_2r(void)
ddr_fsp0_2d_cfg[i].val = 0x3;
}
};
+
+/* Convert 2 GiB DRAM settings to 4 GiB 1-rank DRAM settings. */
+void dh_imx8mp_dhcom_dram_patch_16g_x32_to_32g_x32_1r(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ddr_ddrc_cfg); i++) {
+ if (ddr_ddrc_cfg[i].reg == 0x3d400064)
+ ddr_ddrc_cfg[i].val = 0x6d0156;
+ if (ddr_ddrc_cfg[i].reg == 0x3d400138)
+ ddr_ddrc_cfg[i].val = 0x15d;
+#if IS_ENABLED(CONFIG_IMX8M_DRAM_INLINE_ECC)
+ if (ddr_ddrc_cfg[i].reg == 0x3d400200)
+ ddr_ddrc_cfg[i].val = 0x1f;
+ if (ddr_ddrc_cfg[i].reg == 0x3d40020c)
+ ddr_ddrc_cfg[i].val = 0x14141400;
+#else
+ if (ddr_ddrc_cfg[i].reg == 0x3d400200)
+ ddr_ddrc_cfg[i].val = 0x17;
+#endif
+ if (ddr_ddrc_cfg[i].reg == 0x3d40021c)
+ ddr_ddrc_cfg[i].val = 0xf04;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402024)
+ ddr_ddrc_cfg[i].val = 0x61a800;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402064)
+ ddr_ddrc_cfg[i].val = 0x18004c;
+ if (ddr_ddrc_cfg[i].reg == 0x3d4020dc)
+ ddr_ddrc_cfg[i].val = 0x940009;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402100)
+ ddr_ddrc_cfg[i].val = 0xc080609;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402104)
+ ddr_ddrc_cfg[i].val = 0x3040d;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402108)
+ ddr_ddrc_cfg[i].val = 0x3060a0c;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402110)
+ ddr_ddrc_cfg[i].val = 0x4040204;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402114)
+ ddr_ddrc_cfg[i].val = 0x2030303;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402138)
+ ddr_ddrc_cfg[i].val = 0x4e;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402144)
+ ddr_ddrc_cfg[i].val = 0x280014;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402180)
+ ddr_ddrc_cfg[i].val = 0xc80006;
+ if (ddr_ddrc_cfg[i].reg == 0x3d402190)
+ ddr_ddrc_cfg[i].val = 0x3878202;
+ if (ddr_ddrc_cfg[i].reg == 0x3d4021b4)
+ ddr_ddrc_cfg[i].val = 0x702;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403024)
+ ddr_ddrc_cfg[i].val = 0x493fe1;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403064)
+ ddr_ddrc_cfg[i].val = 0x12003a;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403100)
+ ddr_ddrc_cfg[i].val = 0xa070507;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403104)
+ ddr_ddrc_cfg[i].val = 0x3040a;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403108)
+ ddr_ddrc_cfg[i].val = 0x203070b;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403110)
+ ddr_ddrc_cfg[i].val = 0x3040203;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403114)
+ ddr_ddrc_cfg[i].val = 0x2030303;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403138)
+ ddr_ddrc_cfg[i].val = 0x3b;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403144)
+ ddr_ddrc_cfg[i].val = 0x1f0010;
+ if (ddr_ddrc_cfg[i].reg == 0x3d403180)
+ ddr_ddrc_cfg[i].val = 0x970005;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ddr_ddrphy_cfg); i++) {
+ if (ddr_ddrphy_cfg[i].reg == 0x12002e)
+ ddr_ddrphy_cfg[i].val = 0x1;
+ if (ddr_ddrphy_cfg[i].reg == 0x22002e)
+ ddr_ddrphy_cfg[i].val = 0x1;
+ if (ddr_ddrphy_cfg[i].reg == 0x120008)
+ ddr_ddrphy_cfg[i].val = 0xc8;
+ if (ddr_ddrphy_cfg[i].reg == 0x220008)
+ ddr_ddrphy_cfg[i].val = 0x96;
+ if (ddr_ddrphy_cfg[i].reg == 0x200f0)
+ ddr_ddrphy_cfg[i].val = 0x500;
+ if (ddr_ddrphy_cfg[i].reg == 0x200f4)
+ ddr_ddrphy_cfg[i].val = 0x5555;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ddr_fsp1_cfg); i++) {
+ if (ddr_fsp1_cfg[i].reg == 0x54002)
+ ddr_fsp1_cfg[i].val = 0x1;
+ if (ddr_fsp1_cfg[i].reg == 0x54003)
+ ddr_fsp1_cfg[i].val = 0x320;
+ if (ddr_fsp1_cfg[i].reg == 0x54019)
+ ddr_fsp1_cfg[i].val = 0x994;
+ if (ddr_fsp1_cfg[i].reg == 0x5401f)
+ ddr_fsp1_cfg[i].val = 0x994;
+ if (ddr_fsp1_cfg[i].reg == 0x54032)
+ ddr_fsp1_cfg[i].val = 0x9400;
+ if (ddr_fsp1_cfg[i].reg == 0x54033)
+ ddr_fsp1_cfg[i].val = 0xf309;
+ if (ddr_fsp1_cfg[i].reg == 0x54038)
+ ddr_fsp1_cfg[i].val = 0x9400;
+ if (ddr_fsp1_cfg[i].reg == 0x54039)
+ ddr_fsp1_cfg[i].val = 0xf309;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ddr_fsp2_cfg); i++) {
+ if (ddr_fsp2_cfg[i].reg == 0x54002)
+ ddr_fsp2_cfg[i].val = 0x2;
+ if (ddr_fsp2_cfg[i].reg == 0x54003)
+ ddr_fsp2_cfg[i].val = 0x258;
+ if (ddr_fsp2_cfg[i].reg == 0x54019)
+ ddr_fsp2_cfg[i].val = 0x994;
+ if (ddr_fsp2_cfg[i].reg == 0x5401f)
+ ddr_fsp2_cfg[i].val = 0x994;
+ if (ddr_fsp2_cfg[i].reg == 0x54032)
+ ddr_fsp2_cfg[i].val = 0x9400;
+ if (ddr_fsp2_cfg[i].reg == 0x54033)
+ ddr_fsp2_cfg[i].val = 0xf309;
+ if (ddr_fsp2_cfg[i].reg == 0x54038)
+ ddr_fsp2_cfg[i].val = 0x9400;
+ if (ddr_fsp2_cfg[i].reg == 0x54039)
+ ddr_fsp2_cfg[i].val = 0xf309;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ddr_phy_pie); i++) {
+ if (ddr_phy_pie[i].reg == 0x12000b)
+ ddr_phy_pie[i].val = 0xe1;
+ if (ddr_phy_pie[i].reg == 0x12000c)
+ ddr_phy_pie[i].val = 0x32;
+ if (ddr_phy_pie[i].reg == 0x12000d)
+ ddr_phy_pie[i].val = 0x1f4;
+ if (ddr_phy_pie[i].reg == 0x22000b)
+ ddr_phy_pie[i].val = 0xa8;
+ if (ddr_phy_pie[i].reg == 0x22000c)
+ ddr_phy_pie[i].val = 0x25;
+ if (ddr_phy_pie[i].reg == 0x22000d)
+ ddr_phy_pie[i].val = 0x177;
+ }
+};
diff --git a/board/dhelectronics/dh_imx8mp/spl.c b/board/dhelectronics/dh_imx8mp/spl.c
index 8b9dddab79a..aab8550023e 100644
--- a/board/dhelectronics/dh_imx8mp/spl.c
+++ b/board/dhelectronics/dh_imx8mp/spl.c
@@ -107,7 +107,7 @@ static int dh_imx8mp_board_power_init(void)
typedef void (*patch_func_t)(void);
static const patch_func_t dram_patch_fn[8] = {
- NULL, /* 512 MiB */
+ dh_imx8mp_dhcom_dram_patch_16g_x32_to_32g_x32_1r, /* 4096 MiB 1-rank */
NULL, /* 1024 MiB */
NULL, /* 1536 MiB */
dh_imx8mp_dhcom_dram_patch_16g_x32_to_16g_x32, /* 2048 MiB */
@@ -168,7 +168,7 @@ static void dh_imx8mp_dhcom_dram_scrub_32g_x32(void)
typedef void (*scrub_func_t)(void);
static const scrub_func_t dram_scrub_fn[8] = {
- NULL, /* 512 MiB */
+ dh_imx8mp_dhcom_dram_scrub_32g_x32, /* 4096 MiB 1-rank */
NULL, /* 1024 MiB */
NULL, /* 1536 MiB */
dh_imx8mp_dhcom_dram_scrub_16g_x32, /* 2048 MiB */
--
2.53.0
More information about the U-Boot
mailing list