i.MX Processors中的主题 Re: i.MX8mm Kernel Lock

i.MX8mm Kernel Lock

okuda — Tue, 19 Apr 2022 10:55:47 GMT

Hi NXP

I am using yocto kernel version 5.4.3 for the original board.

If you run the qt application in that environment and repeat drawing, the kernel will lock.
When this happens, there will be no debug output.
(Kernel panic logs such as oob and spin_lock are also not output.)

1.During my research, I found ERR050044 in IMX8MM_0N87W.pdf.
What happens when this phenomenon occurs?
　Does it cause the above phenomenon?

2.Is there a patch for ERR050044?

3.The kernel lock phenomenon does not occur when i.MX 8mm is warmed with a dryer.
　What are the possible factors?
　What kind of research should I do?

Best regards,
Koji Okuda

Re: i.MX8mm Kernel Lock

undertess146 — Tue, 19 Apr 2022 11:16:32 GMT

https://tacobellbreakfastmenu.info/

Re: i.MX8mm Kernel Lock

Zhiming_Liu — Tue, 26 Apr 2022 00:48:37 GMT

Sillicon error only can be fixed by next version of chip.Can you confirm your chip number is included in the IMX8MM_0N87W.pdf?

Regards

Zhiming

Re: i.MX8mm Kernel Lock

okuda — Tue, 26 Apr 2022 02:58:58 GMT

1.How can I check the version of chip?
Is the following content all right?
/sys/module/galcore/parameters/chipIDs
cat chipIDs
4294967295,4294967295,4294967295,4294967295,4294967295,
4294967295,4294967295,4294967295,4294967295,4294967295

2.The phenomenon does not occur when the cpu temperature is 50 degrees or higher and
the QT display application is operated.
/sys/class/thermal/thermal_zone0/temp
cat temp
50000

As the temperature drops from 50 degrees, the time it takes for the Kernel to lock tends to decrease.
What are the possible factors?

Re: i.MX8mm Kernel Lock

Zhiming_Liu — Wed, 27 Apr 2022 00:35:28 GMT

Let's check the chip id on top of soc.

Re: i.MX8mm Kernel Lock

okuda — Wed, 27 Apr 2022 01:17:12 GMT

Hi

The image of SOC has been uploaded.
Can you see this image?

Best regards
Koji Okuda

Re: i.MX8mm Kernel Lock

okuda — Wed, 27 Apr 2022 07:37:51 GMT

Hi

The phenomenon does not occur when the cpu temperature is 50 degrees or higher and the QT display application is operated.
/sys/class/thermal/thermal_zone0/temp
cat temp
50000

As the temperature drops from 50 degrees, the time it takes for the Kernel to lock tends to decrease.

What are the possible factors?

Please give us some advice on the above.

Best Regards
Koji Okuda

Re: i.MX8mm Kernel Lock

Zhiming_Liu — Fri, 29 Apr 2022 02:33:44 GMT

Can you try latest BSP?

If this issue exist in latest BSP, i can create an internal case.

Re: i.MX8mm Kernel Lock

okuda — Sun, 01 May 2022 00:57:11 GMT

How can I get the latest BSP?
If I can get it, I can try it.

What does "create an internal case." Mean?