J784S4XEVM: Board reset after about 30 Mins

Marco K

Part Number: J784S4XEVM

Dear Support-Team,

I am running into the same issue as described in the linked issue.
Since the thread somehow just ended, I wanted to ask if there has been some kind of resolution to the encountered issue.

I tried to read the CTRL_MMR_CFG0_RESET_SRC_STAT register, but run into problems because after the reset u-boot can no longer read the partition table on MMC 1:0:

U-Boot SPL 2025.01-00551-g743712b9ee4b (Jul 31 2025 - 11:32:44 +0000)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.1.8--v11.01.08 (Fancy Rat)')
Initialized 4 DRAM controllers
SPL initial stack usage: 13456 bytes
Trying to boot from MMC2
Error reading cluster
spl_load_image_fat: error reading image tispl.bin, err - -5
** Can't read partition table on 1:0 **
spl: no partition table found
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

This issue disappears after a cold reset until the next time the target resets after some time.

I'll try to get the content of CTRL_MMR_CFG0_RESET_SRC_STAT, but maybe you alread have some insight on this issue.

Thanks and kind regards,
Marco

6 months ago

0 Marco K 6 months ago

Prodigy 140 points

Hi again,

in the mean time I was able to read the CTRL_MMR_CFG0_RESET_SRC_STAT register:

root@j784s4-evm:~# devmem2 0x43000050 /dev/mem opened. Memory mapped at address 0xffff9b142000. Read at address 0x43000050 (0xffff9b142050): 0x00000800

So this means the RESET_SRC_STAT_PORZ_PIN is set.
This is the same as if I would have started the board from cold start.

Not sure if this helps.

Any ideas on how to proceed from here would be very appreciated.

Thanks and kind regards,
Marco

0 Keerthy J 6 months ago in reply to Marco K

TI__Guru**** 170660 points

Marco,

Can you check if SOC temperature is high?

cat /sys/class/thermal/thermal_zone*/temp

Also does it reset exactly at the same time each boot? That can potentially mean a watchdog timeout as well.

- Keerthy

0 Marco K 6 months ago in reply to Marco K

Prodigy 140 points

Hi!

One more update:

I could now verify that the reset always happens about 13 minutes (30 Mins was a very rough estimation) after the last one.
This means that also after a reset happens that leads to booting the OS a second time, it again takes 13 minutes for the next reset to happen.

The reset happens also if I interrupt the U-Boot autoboot and wait 13 minutes.
An issue with the power supply can be pretty much excluded, since the reset is very much timed with power-on and reset.

Kind regards,
Marco