Hi,
If you have the HPS to use the FPGA peripherals, the FPGA will need to be configured before HPS can proceed, which you are observing. Thus, you will need to enable the bridges first, then program/configure the FPGA.
You can do the FPGA programming from preloader, the steps are describe below for reference:
https://rocketboards.org/foswiki/Documentation/GSRD131ProgrammingFPGA#FPGA_Configuration_from_Preloader
You may refer to our Cyclone V Device Design Guideline before for other feature/information.
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an-cv-av-soc-ddg.pdf
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