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beagleboard / beaglebone-ai-64

Mirror of https://git.beagleboard.org/beagleboard/beaglebone-ai-64
https://beaglebone.ai/64
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R5 SPL: Timeout during frequency handshake #42

Closed nmenon closed 11 months ago

nmenon commented 2 years ago

6 / 1500 boards in production floor consistently show "Timeout during frequency handshake" Kingston DDR on all production boards. SN 202208 001462 falls in this category (shipped to Jason).

This ticket tracks this specific issue.

U-Boot SPL 2021.01-00015-gf158702edf4b (Oct 25 2022 - 18:38:17 -0500)
Model: BeagleBoard.org BeagleBone AI-64 R5 NM-LP4-3200-SK-wrDBI
EEPROM not available at 0x50, trying to read at 0x51
Reading on-board EEPROM at 0x51 failed -1
Board: J721EX-PM1-SOM rev E2
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.4.1--v08.04.01 (Jolly Jellyfi')
EEPROM not available at 0x50, trying to read at 0x51
Reading on-board EEPROM at 0x51 failed -1
Timeout during frequency handshake
### ERROR ### Please RESET the board ###

U-Boot SPL 2021.01-00015-gf158702edf4b (Oct 25 2022 - 18:38:17 -0500)
Model: BeagleBoard.org BeagleBone AI-64 R5 NM-LP4-3200-SK-wrDBI
EEPROM not available at 0x50, trying to read at 0x51
Reading on-board EEPROM at 0x51 failed -1
Board: J721EX-PM1-SOM rev E2
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.4.1--v08.04.01 (Jolly Jellyfi')
EEPROM not available at 0x50, trying to read at 0x51
Reading on-board EEPROM at 0x51 failed -1
Timeout during frequency handshake
### ERROR ### Please RESET the board ###

e2e.ti.com https://e2e.ti.com/search?q=%22timeout%20during%20frequency%20handshake%22&category=forum -> there seems to be others who seem to have managed by slowing the DDR down - we seem to have tried the same as well, without success.