Verdin IMX8MM secure, closing device, compare fuse bank failure

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Hello Richard,

Thank you for reaching out with your question. The fuse comparison failures you’re encountering during the secure boot setup on your Verdin iMX8M Mini suggest there might be a mismatch between the expected and actual fuse values. This can occur if the fuses have not been correctly programmed or if the U-Boot image is not properly signed.

Here are some steps to help you troubleshoot and resolve this issue:

  1. Verify Fuse Programming: Ensure that the fuses have been programmed correctly. You can use the fuse read command in U-Boot to check the current values of the fuses and compare them with the expected values. This will help confirm if the fuses are set as intended.

  2. Check U-Boot Image Signing: Make sure that your U-Boot image is correctly signed. The secure boot process relies on the image being signed with the correct keys. If the image is not signed or is signed with incorrect keys, the comparison will fail.

  3. Review Secure Boot Configuration: Double-check your secure boot configuration settings. Ensure that all necessary steps have been followed, including setting up the High Assurance Boot (HAB) and any related configurations.

  4. Test in Open State: Before enforcing the fuses, test your setup in the open state to ensure that everything works as expected. This can help identify any issues without the risk of bricking the device.

  5. Backup and Documentation: Make sure to back up any important data and document your current configuration settings. This will be useful if you need to revert any changes or troubleshoot further.

If you are confident that the fuses are programmed correctly and the U-Boot image is properly signed, you can proceed with enforcing the fuses. However, proceed with caution and ensure that you have verified all settings to avoid bricking the device.

I hope this helps you resolve the issue. If you have any more questions, feel free to ask.

Best regards,
Toradex AI Assistant

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