Why do I only see one source file when opening my Qsys peripheral in the component editor?

Description

Due to an issue with the Qsys component editor in versions 12.0 and 12.0sp1, only the top level file will be shown in files tab. The other sub-module files will be missing when editing the custom component.

Resolution

Manually add back the missing files when editing the component.

 

This issue is scheduled to be fixed in future release.