Dear all, It is found that the latest commits had introduce some kind of calibration fail.
1) Seems like ECC had been removed or not even introduce to mainstream U-Boot 2) Code diff shows no major driver/ddr change before the calibration aka sdram_probe. Based on the above simple checks, There must be s.t. to do with a) reset b) clock manager Please maintainers have a look and resolve this trouble. Issue had been reported in altera forum as well [1], [2]. Meanwhile, rolling back to altera uboot trunk 2025.07 shows no issue. Both 2026.01-xxx and 2025.10 also can trigger the issue. Master reset can trigger a good boot very unlikely. [1] https://community.altera.com/discussions/soc-system/hps-sdram-calibration-failed/337594 [2] https://community.altera.com/discussions/soc-system/sdram-calibration-failed-/337648 Brian
