Unexpected Interrupt latency error | eMMC

[Ahalya_Ganesan]

Hi,

We are currently working with intel agilex SOC (AGFB012R24B2I3E). We have built u-boot by following this :https://www.rocketboards.org/foswiki/Documentation/BuildingBootloaderAgilex7

We have built kernel image by following this:https://www.rocketboards.org/foswiki/Projects/AgilexSoCWithEMMCStorageOnHPS

Currently we are facing a issue like, once the ethernet controller is intialized at kernel level we are getting  a warning message from eMMC like "Unexpected interrupt latency".This error is arising from the probe function of eMMC driver.The kernel is getting intialised completely and we can able to run user application also. But this error is happening ocassionally and also after sometime the board hangs and reboots. 

At hardware level, same supply is given for ethernet and eMMC controller,there is a voltage drop happening when the issue pops up.

Can you give

[Farabi]

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[Farabi]

Hello,

Please submit IPS case if you need more support.

The possible root cause of your issue is :

1. voltage drop
2. Driver issue
3. PCB design issue- decoupling capacitors not sufficient
4. kernel issue
5. timing issue

You need to monitor the voltage during power up and see if there is voltage drop during ramping up.

Please check the log file if there is error on driver or kernel integration issue.

regards,

Farabi