I am trying to test v4 of your patch series for USB support on rpi4: https://patchwork.ozlabs.org/project/uboot/list/?series=179078
I am building u-boot 64-bit. Testing on a rpi4 B 1.2 board. But, USB is not working for me and wanted to see if you had any ideas. Are there other dependencies other than just applying your patch series?
I've pasted the u-boot console output below.
From what I can tell this board does not need the VL805 firmware
1.2 rev boards do need the firmware loading patch series, not sure about any other patches.
Are you sure? A colleague of mine said that it was in 1.4 that the flash chip for the VL805 was removed. I can physically see that the flash chip is on my board.
Yes, I am sure, the 1.2 is for the 2/4Gb model with the changes that need the firmware loading, the 1.4 according to their rev docs is limited to the 8Gb model ATM.
https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-code...
In any case, I did figure out one thing that was going on. I was using the rpi4 DTB as it came shipped with my board. I found that on the PCIe node there was a typo in the compatible string. I fixed that: bus-range = <0x0 0x1>;
compatible = "brcm,bcm7211-pcie","brcm,bcm7445-pcie", "brcm,pci-plat-dev";
compatible = "brcm,bcm2711-pcie","brcm,bcm7445-pcie", "brcm,pci-plat-dev"; max-link-speed = <0x2>;
...and USB now starts up and works.
Thanks, Stuart