Hi,
Please refer to the next document and post.
In addition, I confirmed the ‘/boot/config-4.19.193-17-rockchip-ga4e78ea509f7’ included ‘CONFIG_PCI_MSI=y’ line.
https://wiki.radxa.com/Rock3/dev/install-coral-pcie-driver-and_edge_tpu-runtime-packages
https://forum.radxa.com/t/rock-3a-google-coral-dual-edge-tpu/7570