Re:Raspberry Pi 4 PCIe bridge “chip”
by q3k on Wednesday July 01, 2020 @10:48AM
(#23701936)
> The next obvious step is hooking up this to a PLX chip. Duplicating the number of lanes available even if there's no additional bandwidth could really open up doors.
It worked, kinda. After a kernel rebuild with the drivers I wanted and dtb bumps to allow for more PCIe MEMBAR space i was able to get multiple devices (IIRC 10GbE and SATA controller) to work simulataneously, just very slowly.
I did this with an external PCIe 'splitter'/switch board: https://twitter.com/q3k/status/1225560443927891971
It worked, kinda. After a kernel rebuild with the drivers I wanted and dtb bumps to allow for more PCIe MEMBAR space i was able to get multiple devices (IIRC 10GbE and SATA controller) to work simulataneously, just very slowly.