ARM: imx: Update DRAM timings with inline ECC on DH i.MX8MP DHCOM SoM

Import DRAM timings generated by the DDR tool 3.31 which introduce assorted
tweaks to the DRAM controller settings. Furthermore, enable DBI to improve
noise resilience of the DRAM bus by reducing the number of bit changes on
the bus.

Reduce the DRAM rate to 3600 MTps to remove all remaining correctable errors
reported by EDAC . It is not entirely clear why the slightly faster setting
does produce sporadic correctable errors, while this one does not, but this
could be related to simpler PLL setting at 3600 MTps.

Enable inline ECC which is necessary to detect ECC errors and collect
statistics by the EDAC driver in Linux. This reduces the DRAM size by
64 MiB for each 512 MiB of DRAM, so for a 4 GiB device the available
DRAM size becomes 3.5 GiB and for 2 GiB device the available DRAM size
becomes 1.8 GiB.

Signed-off-by: Marek Vasut <marex@denx.de>

1 files changed, 89 insertions, 60 deletions

diff --git a/board/dhelectronics/dh_imx8mp/lpddr4_timing_4G_32.c b/board/dhelectronics/dh_imx8mp/lpddr4_timing_4G_32.c
index a4c1b121c2..41b078f6e9 100644
--- a/board/dhelectronics/dh_imx8mp/lpddr4_timing_4G_32.c
+++ b/board/dhelectronics/dh_imx8mp/lpddr4_timing_4G_32.c
@@ -14,47 +14,66 @@ static struct dram_cfg_param ddr_ddrc_cfg[] = {
 	{ 0x3d400030, 0x1 },
 	{ 0x3d400000, 0xa3080020 },
 	{ 0x3d400020, 0x1323 },
-	{ 0x3d400024, 0x1c79100 },
-	{ 0x3d400064, 0x710106 },
+	{ 0x3d400024, 0x1b77400 },
+	{ 0x3d400064, 0x6d00fc },
+#if IS_ENABLED(CONFIG_IMX8M_DRAM_INLINE_ECC)
+	{ 0x3d400070, 0x7027fd4 },
+#else
 	{ 0x3d400070, 0x7027f90 },
+#endif
 	{ 0x3d400074, 0x790 },
-	{ 0x3d4000d0, 0xc0030720 },
-	{ 0x3d4000d4, 0xb80000 },
+	{ 0x3d4000d0, 0xc00306df },
+	{ 0x3d4000d4, 0xb10000 },
 	{ 0x3d4000dc, 0xe40036 },
-	{ 0x3d4000e0, 0x330000 },
+	{ 0x3d4000e0, 0xf30000 },
 	{ 0x3d4000e8, 0x660048 },
 	{ 0x3d4000ec, 0x160048 },
-	{ 0x3d400100, 0x1e262028 },
-	{ 0x3d400104, 0x7073b },
-	{ 0x3d40010c, 0xe0e000 },
-	{ 0x3d400110, 0x11040a11 },
+	{ 0x3d400100, 0x1d241e26 },
+	{ 0x3d400104, 0x70739 },
+	{ 0x3d40010c, 0xd0d000 },
+	{ 0x3d400110, 0x11040911 },
 	{ 0x3d400114, 0x2050e0e },
 	{ 0x3d400118, 0x1010008 },
-	{ 0x3d40011c, 0x501 },
+	{ 0x3d40011c, 0x502 },
 	{ 0x3d400130, 0x20700 },
-	{ 0x3d400134, 0xe100002 },
-	{ 0x3d400138, 0x10d },
-	{ 0x3d400144, 0xbb005e },
-	{ 0x3d400180, 0x3a5001c },
-	{ 0x3d400184, 0x2f071e5 },
+	{ 0x3d400134, 0xd100002 },
+	{ 0x3d400138, 0x103 },
+	{ 0x3d400144, 0xb4005a },
+	{ 0x3d400180, 0x384001b },
+	{ 0x3d400184, 0x2d06ddd },
 	{ 0x3d400188, 0x0 },
-	{ 0x3d400190, 0x49b820c },
+	{ 0x3d400190, 0x49f820c },
 	{ 0x3d400194, 0x80303 },
-	{ 0x3d4001b4, 0x1b0c },
+	{ 0x3d4001b4, 0x1f0c },
 	{ 0x3d4001a0, 0xe0400018 },
 	{ 0x3d4001a4, 0xdf00e4 },
 	{ 0x3d4001a8, 0x80000000 },
 	{ 0x3d4001b0, 0x11 },
-	{ 0x3d4001c0, 0x1 },
+	{ 0x3d4001c0, 0x7 },
 	{ 0x3d4001c4, 0x1 },
-	{ 0x3d4000f4, 0xc99 },
-	{ 0x3d400108, 0x810191a },
+	{ 0x3d4000f4, 0x799 },
+	{ 0x3d400108, 0x8121b1a },
+#if IS_ENABLED(CONFIG_IMX8M_DRAM_INLINE_ECC)
+	{ 0x3d400200, 0x14 },
+#else
 	{ 0x3d400200, 0x17 },
+#endif
+	{ 0x3d400208, 0x0 },
+#if IS_ENABLED(CONFIG_IMX8M_DRAM_INLINE_ECC)
+	{ 0x3d40020c, 0x14141400 },
+#else
 	{ 0x3d40020c, 0x0 },
+#endif
 	{ 0x3d400210, 0x1f1f },
+#if IS_ENABLED(CONFIG_IMX8M_DRAM_INLINE_ECC)
+	{ 0x3d400204, 0x50505 },
+	{ 0x3d400214, 0x4040404 },
+	{ 0x3d400218, 0x4040404 },
+#else
 	{ 0x3d400204, 0x80808 },
 	{ 0x3d400214, 0x7070707 },
 	{ 0x3d400218, 0x7070707 },
+#endif
 	{ 0x3d40021c, 0xf0f },
 	{ 0x3d400250, 0x1705 },
 	{ 0x3d400254, 0x2c },
@@ -73,7 +92,7 @@ static struct dram_cfg_param ddr_ddrc_cfg[] = {
 	{ 0x3d402050, 0x20d000 },
 	{ 0x3d402064, 0xc001c },
 	{ 0x3d4020dc, 0x840000 },
-	{ 0x3d4020e0, 0x330000 },
+	{ 0x3d4020e0, 0xf30000 },
 	{ 0x3d4020e8, 0x660048 },
 	{ 0x3d4020ec, 0x160048 },
 	{ 0x3d402100, 0xa040305 },
@@ -83,7 +102,7 @@ static struct dram_cfg_param ddr_ddrc_cfg[] = {
 	{ 0x3d402110, 0x2040202 },
 	{ 0x3d402114, 0x2030202 },
 	{ 0x3d402118, 0x1010004 },
-	{ 0x3d40211c, 0x301 },
+	{ 0x3d40211c, 0x302 },
 	{ 0x3d402130, 0x20300 },
 	{ 0x3d402134, 0xa100002 },
 	{ 0x3d402138, 0x1d },
@@ -92,13 +111,13 @@ static struct dram_cfg_param ddr_ddrc_cfg[] = {
 	{ 0x3d402190, 0x3818200 },
 	{ 0x3d402194, 0x80303 },
 	{ 0x3d4021b4, 0x100 },
-	{ 0x3d4020f4, 0xc99 },
+	{ 0x3d4020f4, 0x599 },
 	{ 0x3d403020, 0x1021 },
 	{ 0x3d403024, 0xc3500 },
 	{ 0x3d403050, 0x20d000 },
 	{ 0x3d403064, 0x30007 },
 	{ 0x3d4030dc, 0x840000 },
-	{ 0x3d4030e0, 0x330000 },
+	{ 0x3d4030e0, 0xf30000 },
 	{ 0x3d4030e8, 0x660048 },
 	{ 0x3d4030ec, 0x160048 },
 	{ 0x3d403100, 0xa010102 },
@@ -108,7 +127,7 @@ static struct dram_cfg_param ddr_ddrc_cfg[] = {
 	{ 0x3d403110, 0x2040202 },
 	{ 0x3d403114, 0x2030202 },
 	{ 0x3d403118, 0x1010004 },
-	{ 0x3d40311c, 0x301 },
+	{ 0x3d40311c, 0x302 },
 	{ 0x3d403130, 0x20300 },
 	{ 0x3d403134, 0xa100002 },
 	{ 0x3d403138, 0x8 },
@@ -117,7 +136,7 @@ static struct dram_cfg_param ddr_ddrc_cfg[] = {
 	{ 0x3d403190, 0x3818200 },
 	{ 0x3d403194, 0x80303 },
 	{ 0x3d4031b4, 0x100 },
-	{ 0x3d4030f4, 0xc99 },
+	{ 0x3d4030f4, 0x599 },
 	{ 0x3d400028, 0x0 },
 };
 
@@ -268,7 +287,7 @@ static struct dram_cfg_param ddr_ddrphy_cfg[] = {
 	{ 0x20018, 0x3 },
 	{ 0x20075, 0x4 },
 	{ 0x20050, 0x0 },
-	{ 0x20008, 0x3a5 },
+	{ 0x20008, 0x384 },
 	{ 0x120008, 0x64 },
 	{ 0x220008, 0x19 },
 	{ 0x20088, 0x9 },
@@ -314,19 +333,15 @@ static struct dram_cfg_param ddr_ddrphy_cfg[] = {
 	{ 0x200f6, 0x0 },
 	{ 0x200f7, 0xf000 },
 	{ 0x20025, 0x0 },
-	{ 0x2002d, 0x0 },
-	{ 0x12002d, 0x0 },
-	{ 0x22002d, 0x0 },
+	{ 0x2002d, 0x1 },
+	{ 0x12002d, 0x1 },
+	{ 0x22002d, 0x1 },
 	{ 0x2007d, 0x212 },
 	{ 0x12007d, 0x212 },
 	{ 0x22007d, 0x212 },
 	{ 0x2007c, 0x61 },
 	{ 0x12007c, 0x61 },
 	{ 0x22007c, 0x61 },
-	{ 0x1004a, 0x500 },
-	{ 0x1104a, 0x500 },
-	{ 0x1204a, 0x500 },
-	{ 0x1304a, 0x500 },
 	{ 0x2002c, 0x0 },
 };
 
@@ -1056,7 +1071,7 @@ static struct dram_cfg_param ddr_ddrphy_trained_csr[] = {
 /* P0 message block paremeter for training firmware */
 static struct dram_cfg_param ddr_fsp0_cfg[] = {
 	{ 0xd0000, 0x0 },
-	{ 0x54003, 0xe94 },
+	{ 0x54003, 0xe10 },
 	{ 0x54004, 0x2 },
 	{ 0x54005, 0x2228 },
 	{ 0x54006, 0x14 },
@@ -1066,25 +1081,25 @@ static struct dram_cfg_param ddr_fsp0_cfg[] = {
 	{ 0x5400f, 0x100 },
 	{ 0x54012, 0x310 },
 	{ 0x54019, 0x36e4 },
-	{ 0x5401a, 0x33 },
+	{ 0x5401a, 0xf3 },
 	{ 0x5401b, 0x4866 },
 	{ 0x5401c, 0x4800 },
 	{ 0x5401e, 0x16 },
 	{ 0x5401f, 0x36e4 },
-	{ 0x54020, 0x33 },
+	{ 0x54020, 0xf3 },
 	{ 0x54021, 0x4866 },
 	{ 0x54022, 0x4800 },
 	{ 0x54024, 0x16 },
 	{ 0x5402b, 0x1000 },
 	{ 0x5402c, 0x3 },
 	{ 0x54032, 0xe400 },
-	{ 0x54033, 0x3336 },
+	{ 0x54033, 0xf336 },
 	{ 0x54034, 0x6600 },
 	{ 0x54035, 0x48 },
 	{ 0x54036, 0x48 },
 	{ 0x54037, 0x1600 },
 	{ 0x54038, 0xe400 },
-	{ 0x54039, 0x3336 },
+	{ 0x54039, 0xf336 },
 	{ 0x5403a, 0x6600 },
 	{ 0x5403b, 0x48 },
 	{ 0x5403c, 0x48 },
@@ -1106,25 +1121,25 @@ static struct dram_cfg_param ddr_fsp1_cfg[] = {
 	{ 0x5400f, 0x100 },
 	{ 0x54012, 0x310 },
 	{ 0x54019, 0x84 },
-	{ 0x5401a, 0x33 },
+	{ 0x5401a, 0xf3 },
 	{ 0x5401b, 0x4866 },
 	{ 0x5401c, 0x4800 },
 	{ 0x5401e, 0x16 },
 	{ 0x5401f, 0x84 },
-	{ 0x54020, 0x33 },
+	{ 0x54020, 0xf3 },
 	{ 0x54021, 0x4866 },
 	{ 0x54022, 0x4800 },
 	{ 0x54024, 0x16 },
 	{ 0x5402b, 0x1000 },
 	{ 0x5402c, 0x3 },
 	{ 0x54032, 0x8400 },
-	{ 0x54033, 0x3300 },
+	{ 0x54033, 0xf300 },
 	{ 0x54034, 0x6600 },
 	{ 0x54035, 0x48 },
 	{ 0x54036, 0x48 },
 	{ 0x54037, 0x1600 },
 	{ 0x54038, 0x8400 },
-	{ 0x54039, 0x3300 },
+	{ 0x54039, 0xf300 },
 	{ 0x5403a, 0x6600 },
 	{ 0x5403b, 0x48 },
 	{ 0x5403c, 0x48 },
@@ -1146,25 +1161,25 @@ static struct dram_cfg_param ddr_fsp2_cfg[] = {
 	{ 0x5400f, 0x100 },
 	{ 0x54012, 0x310 },
 	{ 0x54019, 0x84 },
-	{ 0x5401a, 0x33 },
+	{ 0x5401a, 0xf3 },
 	{ 0x5401b, 0x4866 },
 	{ 0x5401c, 0x4800 },
 	{ 0x5401e, 0x16 },
 	{ 0x5401f, 0x84 },
-	{ 0x54020, 0x33 },
+	{ 0x54020, 0xf3 },
 	{ 0x54021, 0x4866 },
 	{ 0x54022, 0x4800 },
 	{ 0x54024, 0x16 },
 	{ 0x5402b, 0x1000 },
 	{ 0x5402c, 0x3 },
 	{ 0x54032, 0x8400 },
-	{ 0x54033, 0x3300 },
+	{ 0x54033, 0xf300 },
 	{ 0x54034, 0x6600 },
 	{ 0x54035, 0x48 },
 	{ 0x54036, 0x48 },
 	{ 0x54037, 0x1600 },
 	{ 0x54038, 0x8400 },
-	{ 0x54039, 0x3300 },
+	{ 0x54039, 0xf300 },
 	{ 0x5403a, 0x6600 },
 	{ 0x5403b, 0x48 },
 	{ 0x5403c, 0x48 },
@@ -1175,7 +1190,7 @@ static struct dram_cfg_param ddr_fsp2_cfg[] = {
 /* P0 2D message block paremeter for training firmware */
 static struct dram_cfg_param ddr_fsp0_2d_cfg[] = {
 	{ 0xd0000, 0x0 },
-	{ 0x54003, 0xe94 },
+	{ 0x54003, 0xe10 },
 	{ 0x54004, 0x2 },
 	{ 0x54005, 0x2228 },
 	{ 0x54006, 0x14 },
@@ -1186,25 +1201,25 @@ static struct dram_cfg_param ddr_fsp0_2d_cfg[] = {
 	{ 0x54010, 0x1f7f },
 	{ 0x54012, 0x310 },
 	{ 0x54019, 0x36e4 },
-	{ 0x5401a, 0x33 },
+	{ 0x5401a, 0xf3 },
 	{ 0x5401b, 0x4866 },
 	{ 0x5401c, 0x4800 },
 	{ 0x5401e, 0x16 },
 	{ 0x5401f, 0x36e4 },
-	{ 0x54020, 0x33 },
+	{ 0x54020, 0xf3 },
 	{ 0x54021, 0x4866 },
 	{ 0x54022, 0x4800 },
 	{ 0x54024, 0x16 },
 	{ 0x5402b, 0x1000 },
 	{ 0x5402c, 0x3 },
 	{ 0x54032, 0xe400 },
-	{ 0x54033, 0x3336 },
+	{ 0x54033, 0xf336 },
 	{ 0x54034, 0x6600 },
 	{ 0x54035, 0x48 },
 	{ 0x54036, 0x48 },
 	{ 0x54037, 0x1600 },
 	{ 0x54038, 0xe400 },
-	{ 0x54039, 0x3336 },
+	{ 0x54039, 0xf336 },
 	{ 0x5403a, 0x6600 },
 	{ 0x5403b, 0x48 },
 	{ 0x5403c, 0x48 },
@@ -1694,9 +1709,9 @@ static struct dram_cfg_param ddr_phy_pie[] = {
 	{ 0x400d7, 0x20b },
 	{ 0x2003a, 0x2 },
 	{ 0x200be, 0x3 },
-	{ 0x2000b, 0x419 },
-	{ 0x2000c, 0xe9 },
-	{ 0x2000d, 0x91c },
+	{ 0x2000b, 0x3f4 },
+	{ 0x2000c, 0xe1 },
+	{ 0x2000d, 0x8ca },
 	{ 0x2000e, 0x2c },
 	{ 0x12000b, 0x70 },
 	{ 0x12000c, 0x19 },
@@ -1799,8 +1814,8 @@ static struct dram_cfg_param ddr_phy_pie[] = {
 
 static struct dram_fsp_msg ddr_dram_fsp_msg[] = {
 	{
-		/* P0 3733mts 1D */
-		.drate = 3733,
+		/* P0 3600mts 1D */
+		.drate = 3600,
 		.fw_type = FW_1D_IMAGE,
 		.fsp_cfg = ddr_fsp0_cfg,
 		.fsp_cfg_num = ARRAY_SIZE(ddr_fsp0_cfg),
@@ -1820,8 +1835,8 @@ static struct dram_fsp_msg ddr_dram_fsp_msg[] = {
 		.fsp_cfg_num = ARRAY_SIZE(ddr_fsp2_cfg),
 	},
 	{
-		/* P0 3733mts 2D */
-		.drate = 3733,
+		/* P0 3600mts 2D */
+		.drate = 3600,
 		.fw_type = FW_2D_IMAGE,
 		.fsp_cfg = ddr_fsp0_2d_cfg,
 		.fsp_cfg_num = ARRAY_SIZE(ddr_fsp0_2d_cfg),
@@ -1840,5 +1855,19 @@ struct dram_timing_info dh_imx8mp_dhcom_dram_timing_32g_x32 = {
 	.ddrphy_trained_csr_num = ARRAY_SIZE(ddr_ddrphy_trained_csr),
 	.ddrphy_pie = ddr_phy_pie,
 	.ddrphy_pie_num = ARRAY_SIZE(ddr_phy_pie),
-	.fsp_table = { 3733, 400, 100, },
+	.fsp_table = { 3600, 400, 100, },
 };
+
+#if IS_ENABLED(CONFIG_IMX8M_DRAM_INLINE_ECC)
+void dh_imx8mp_dhcom_dram_scrub_32g_x32(void)
+{
+	ddrc_inline_ecc_scrub(0x0,0x7ffffff);
+	ddrc_inline_ecc_scrub(0x8000000,0xfffffff);
+	ddrc_inline_ecc_scrub(0x10000000,0x17ffffff);
+	ddrc_inline_ecc_scrub(0x18000000,0x1fffffff);
+	ddrc_inline_ecc_scrub(0x20000000,0x27ffffff);
+	ddrc_inline_ecc_scrub(0x28000000,0x2fffffff);
+	ddrc_inline_ecc_scrub(0x30000000,0x37ffffff);
+	ddrc_inline_ecc_scrub_end(0x0,0x3fffffff);
+}
+#endif