Hi Johannes,
On 02/11/2022 09:38, SCHNEIDER Johannes wrote:
sadly that does not reproduce on imx8mm ... a long print works fine with or without the patch :-S
Yes, it does happen on imx8mm.
You need to add the print() inside board_init().
Here is a reproducer on imx8mm evk:
diff --git a/board/freescale/imx8mm_evk/imx8mm_evk.c b/board/freescale/imx8mm_evk/imx8mm_evk.c index e0975fcda705..69ec723c616e 100644 --- a/board/freescale/imx8mm_evk/imx8mm_evk.c +++ b/board/freescale/imx8mm_evk/imx8mm_evk.c @@ -50,6 +50,7 @@ int board_init(void) if (IS_ENABLED(CONFIG_FEC_MXC)) setup_fec();
+ printf("*******************0123456789012345678901234567890123456789\n"); return 0; }
The result is:
U-Boot SPL 2022.10-00991-gc8d9ff634fc4-dirty (Nov 02 2022 - 11:15:14 -0300) No pmic SEC0: RNG instantiated cyclic_register for watchdog@30280000 failed WDT: Failed to start watchdog@30280000 Trying to boot from MMC1 NOTICE: BL31: v2.6(release):lf-5.15.32-2.0.0-1-g044ea08c0109 NOTICE: BL31: Built : 11:15:02, Nov 2 2022
U-Boot 2022.10-00991-gc8d9ff634fc4-dirty (Nov 02 2022 - 11:15:14 -0300)
CPU: Freescale i.MX8MMQ rev1.0 at 1200 MHz Reset cause: POR Model: FSL i.MX8MM EVK board DRAM: 2 GiB *******************0123456789012345678901234567890123n�KW�'$HL�� devices, 23 uclasses, devicetree: separate WDT: Started watchdog@30280000 with servicing every 1000ms (60s timeout) MMC: FSL_SDHC: 1, FSL_SDHC: 2 Loading Environment from MMC... OK In: serial@30890000 Out: serial@30890000 Err: serial@30890000 SEC0: RNG instantiated Net: eth0: ethernet@30be0000 Hit any key to stop autoboot: 0 u-boot=>
As you can see the corruption is clearly seen.
The RTC line is displayed from drivers/misc/gsc.c and the Core: comes from dm_announce. Somehow in between the FIFO does not get drained before dm_announce gets called.
"flushing" shouldn't be an issue, since everything goes through the same set of registers which the imx queues into its fifo... i suspect the rootcause lies someplace else?
Reverting your change makes the issue disappear.
Regards,
Fabio Estevam