FPGA-to-HPS SDRAM Interface blocks whole HPS

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I just solved a similar issue. Try burning the sof file first before booting Linux. Once the FPGA is configured, press the WARM reset button to boot Linux. The preloader should automatically configure all the required HPS registers on bootup. From my experience, you cannot properly configure the HPS SDRAM controller registers while Linux is running. This has to be done by the preloader on bootup.

Hope this helps!

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Indeed, if the .sof is loaded before booting linux, that works fine.

Is someone got a solution to avoid rebooting linux each time you what to try some codes?

And why we need to do that? preloader & uboot aren't here to manage intelligente booting??

Nico