I am using custom board having imx8ulp with LPDDR4X(NE6F8FKAPAXAI)
For bring up purpose to configure RAM with MPU I downloaded RPA XLS and DDR Tool from below
ddr-tool-imx8ulp
First I generated ds file and load ds file directly to DDR tool and tried to calibrate but got error
ERROR: Check Data Bit Mapping,
So, I was trying some ways and once I changed cell "C12" below, earlier it was "3" i made it "1" instead(only single change in whole xls and worked)
After that I was able to calibrate it successfully and generated lpddr timing file updated in u-boot and generated u-boot.bin and u-boot-spl.bin made image and flashed.
Now issue I am getting is with above changes, while flashing and booting I required take multiple trials for both(flash&boot) and if I check A core logs,
In the trials which are not successful getting below logs and stuck after below logs everytime
U-Boot SPL 2022.04-dirty (Jan 08 2025 - 12:15:06 +0530)
Normal Boot
ELE firmware version 1.0.0-344acb84
upower_apd_inst_isr: entry
upower_init: soc_id=48
upower_init: version:11.11.13
upower_init: start uPower RAM service
user_upwr_rdy_callb: soc=b
user_upwr_rdy_callb: RAM version:12.17
Turning on switches...
Turn on switches ok
Turning on memories...
Turn on memories ok
Clearing DDR retention...
Clear DDR retention ok
SEC0: RNG instantiated
Trying to boot from BOOTROM
Boot Stage: Primary boot
image offset 0x0, pagesize 0x200, ivt offset 0x0
Load image from 0x67000 by ROM_API
NOTICE: BL31: v2.8(release):lf-6.6.3-1.0.0-0-g8dbe28631
NOTICE: BL31: Built : 17:57:56, Jan 22 2024
NOTICE: upower_init: start uPower RAM service
NOTICE: user_upwr_rdy_callb: soc=b
NOTICE: user_upwr_rdy_callb: RAM version:12.17
On the successful trial I am getting below logs
U-Boot SPL 2022.04-dirty (Jan 08 2025 - 12:15:06 +0530)
Normal Boot
ELE firmware version 1.0.0-344acb84
upower_apd_inst_isr: entry
upower_init: soc_id=48
upower_init: version:11.11.13
upower_init: start uPower RAM service
user_upwr_rdy_callb: soc=b
user_upwr_rdy_callb: RAM version:12.17
Turning on switches...
Turn on switches ok
Turning on memories...
Turn on memories ok
Clearing DDR retention...
Clear DDR retention ok
SEC0: RNG instantiated
Trying to boot from BOOTROM
Boot Stage: USB boot
Find img info 0x&88000000, size 288
Download 943104, Total size 944128
NOTICE: BL31: v2.8(release):lf-6.6.3-1.0.0-0-g8dbe28631
NOTICE: BL31: Built : 17:57:56, Jan 22 2024
NOTICE: upower_init: start uPower RAM service
NOTICE: user_upwr_rdy_callb: soc=b
NOTICE: user_upwr_rdy_callb: RAM version:12.17
U-Boot 2022.04-dirty (Jan 08 2025 - 12:15:06 +0530)
M33 Sync: OK
CPU: i.MX8ULP rev1.2 at 960 MHz
CPU current temperature: 35
Reset cause: POR
Boot mode: Single boot
Model: NXP i.MX8ULP 9X9 EVK
DRAM: 2 GiB
Core: 47 devices, 24 uclasses, devicetree: separate
MMC: FSL_SDHC: 0
Loading Environment from nowhere... OK
[*]-Video Link 0 (720 x 1280)
[0] display-controller@2e050000, video
[1] dsi@2db00000, video_bridge
[2] panel@0, panel
In: serial
Out: serial
Err: serial
SEC0: RNG instantiated
switch to partitions #0, OK
mmc0(part 0) is current device
UID 0x3baf2bda,0xb74e39fc,0xc40c9992,0xb364aa92
Detect USB boot. Will enter fastboot mode!
Net: Fastboot: Normal
Boot from USB for mfgtools
*** Warning - Use default environment for mfgtools
, using default environment
Run bootcmd_mfg: run mfgtool_args;if iminfo ${initrd_addr}; then if test ${tee} = yes; then bootm ${tee_addr} ${initrd_addr} ${fdt_addr}; else booti ${loadaddr} ${initrd_addr} ${fdt_addr}; fi; else echo ;
Hit any key to stop autoboot: 0
## Checking Image at 83800000 ...
Unknown image format!
Run fastboot ...
auto usb 0
UID 0x3baf2bda,0xb74e39fc,0xc40c9992,0xb364aa92
Detect USB boot. Will enter fastboot mode!
flash target is MMC:0
Detect USB boot. Will enter fastboot mode!
switch to partitions #0, OK
mmc0(part 0) is current device
Detect USB boot. Will enter fastboot mode!
So, For successful power up it requires almost 7-10 power cycles, As per my logs and DDR xls change what can be reason for above issue??
BP-IMX8PULP-POC
