How can you enable the FPGASDRAM interface from the newer version of u-boot that includes the preloader?
There is what seems to be an older guide here (https://rocketboards.org/foswiki/Documentation/GSRD131ProgrammingFPGA) on using a u-boot command
This command is not in the environment in the newer releases of u-boot-socfgpa. I am using the branch origin/socfpga_v2019.04
I am fairly confident this bridge is not enabled based on what I am seeing in sysfs in Linux
root@cyclone5:~# ls /sys/class/fpga_bridge/
root@cyclone5:~# cat /sys/class/fpga_bridge/br0/name
root@cyclone5:~# cat /sys/class/fpga_bridge/br1/name
The question follows the issues I was seeing from SignalTap when debugging the master ports to a Altera DMA core mentioned in my recent post (Cyclone 5 F2SDRAM issue)