iMX8QM end Kernel panic

[Ray_chentao]

hello，

I am having a kernel panic problem with the processor  iMX8QM. The DDR Stress Test is OK, what can I do to debug this problem, the error log is attached.

CPU: Freescale i.MX8QM revB A53 at 1200 MHz at 55C
Model: Freescale i.MX8QM MEK
Board: iMX8QM MEK
Boot: MMC0
DRAM: 6 GiB

[ 2.538851] [<ffff000008083230>] el1_irq+0xb0/0x124
[ 2.546978] imx8-dpr-channel 570f0000.dpr-channel: Linked as a consumer to 57060000.prg
[ 2.554505] [<ffff000008085820>] arch_cpu_idle+0x10/0x18
[ 2.554508] [<ffff00000810d8a0>] do_idle+0x120/0x1e0
[ 2.554511] [<ffff00000810dafc>] cpu_startup_entry+0x24/0x28
[ 2.554518] [<ffff00000808fac8>] secondary_start_kernel+0x110/0x120
[ 2.564677] imx8-dpr-channel 57100000.dpr-channel: Linked as a consumer to 57070000.prg
[ 2.570352] Code: bad PC value
[ 2.570365] ---[ end trace bcd121847d8b8700 ]---
[ 2.578229] imx8-dpr-channel 57100000.dpr-channel: Linked as a consumer to 57080000.prg
[ 2.586022] Kernel panic - not syncing: Fatal exception in interrupt
[ 2.586026] SMP: stopping secondary CPUs
[ 2.593865] Kernel Offset: disabled
[ 2.593868] CPU features: 0x180200d
[ 2.593869] Memory Limit: none
[ 2.882678] ---[ end Kernel panic - not syncing: Fatal exception in interrupt

[achintala]

How was this issue solved? @Ray_chentao - I'm running into same problem, would be great to learn from your experience on solving this.

[Zhiming_Liu]

Hi @Ray_chentao 

You should check your DDR Calibration again.

[Ray_chentao]

Hi, @Qmiller, thanks a lot.

How could I check my DDR Calibration?  Use i.MX8 DDR Tools and run the DDR stress test?

The DDR stress test is succeed at DDR clock 800MHz and 1200MHz, but  fail at 1600MHz.

We're trying to config my iMX8QM work at DDR clock 800MHz, but the problem was still occurred with the same log.