Part Number: DRA722
Tool/software: Linux
Dear Sir,
On our custom board, customer would like to change DDR size from 1G to 512M. I have tried to configure DDR in bootloader and kernel, but still cannot boot up successfully.
our modification as below:
1. arch/arm/boot/dts/dra72-evm.dtb
memory {
device_type = "memory";
reg = <0x0 0x80000000 0x0 0x40000000>; /* 1024 MB */
};
And I tried to modify reg to "reg = <0x0 0x80000000 0x0 0x20000000>;"
2. board/ti/dra7xx/evm.c
const struct emif_regs j6e_emif_2_regs_ddr3_532_mhz_1cs_dra_es1 = {
.sdram_config_init = 0x61862B32,
.sdram_config = 0x61862B32,
.sdram_config2 = 0x00000000,
.ref_ctrl = 0x0000514D,
.ref_ctrl_final = 0x0000144A,
.sdram_tim1 = 0xCEF3781C,
.sdram_tim2 = 0x30B37FE3,
.sdram_tim3 = 0x407F8AD8,
.read_idle_ctrl = 0x00050000,
.zq_config = 0x5007190B,
.temp_alert_config = 0x00000000,
.emif_ddr_phy_ctlr_1_init = 0x0E24400E,
.emif_ddr_phy_ctlr_1 = 0x0E24400E,
.emif_ddr_ext_phy_ctrl_1 = 0x10040100,
.emif_ddr_ext_phy_ctrl_2 = 0x00910091,
.emif_ddr_ext_phy_ctrl_3 = 0x00950095,
.emif_ddr_ext_phy_ctrl_4 = 0x009B009B,
.emif_ddr_ext_phy_ctrl_5 = 0x009E009E,
.emif_rd_wr_lvl_rmp_win = 0x00000000,
.emif_rd_wr_lvl_rmp_ctl = 0x00000000,
.emif_rd_wr_lvl_ctl = 0x00000000,
.emif_rd_wr_exec_thresh = 0x00000305
};
I have tried to modify .sdram_config_init from "0x61862B32" to "0x61851AB2" and sdram_config from "0x61862B32" to "0x61851AB2"
const struct dmm_lisa_map_regs j6e_lisa_map_4G_x_1_x_2 = {
.dmm_lisa_map_0 = 0x0,
.dmm_lisa_map_1 = 0x0,
.dmm_lisa_map_2 = 0x80600100,
.dmm_lisa_map_3 = 0xFF020100,
.is_ma_present = 0x1
};
Modified .dmm_lisa_map_2 from "0x80600100" to "0x80500100"
After modifying above configure, The boot flow hang on "starting kernel" and no any message output
console log ================================================== U-Boot SPL 2016.05 (Dec 19 2017 - 19:31:09) DRA722-GP ES1.0 *** Warning - bad CRC, using default environment Trying to boot from MMC2_2 spl: falcon_args_file not set in environment, falling back to default reading args spl_load_image_fat_os: error reading image args, err - -1 reading u-boot.img reading u-boot.img U-Boot 2016.05 (Dec 19 2017 - 19:31:09 +0800) CPU : DRA722-GP ES1.0 Board: DRA72x EVM REV I2C: ready DRAM: 512 MiB MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 *** Warning - bad CRC, using default environment Warning: fastboot.board_rev: unknown board revision GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645 part_get_info_efi: *** ERROR: Invalid GPT *** GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645 part_get_info_efi: *** ERROR: Invalid Backup GPT *** ERROR: cannot find partition: 'userdata' at arch/arm/cpu/armv7/omap-common/utils.c:195/mmc_get_part_size() Warning: fastboot.userdata_size: unable to calc Net: <ethaddr> not set. Validating first E-fuse MAC Could not get PHY for cpsw: addr 3 cpsw Hit any key to stop autoboot: 0 J6E ... switch to partitions #0, OK mmc1(part 0) is current device SD/MMC found on device 1 4168320 bytes read in 203 ms (19.6 MiB/s) 106553 bytes read in 13 ms (7.8 MiB/s) Booting from mmc1 ... Kernel image @ 0x82000000 [ 0x000000 - 0x3f9a80 ] ## Flattened Device Tree blob at 88000000 Booting using the fdt blob at 0x88000000 Loading Device Tree to 8ffe2000, end 8ffff038 ... OK Starting kernel ... ==================================================
Could you provide some direction to debug further?
Thanks for your support.
Best Regards,
Bowei Ren
