MIPI-DSI Troubleshooting

I am trying to get a MIPI-DSI display to work with the regular LattePanda 2G/32G. Both are 4-lane MIPI-DSI and I've made a PCB to map the D0, D1, D2, D3, and CLK lines from board to display. The main test configuration is the LP plugged into a HDMI display as well as the MIPI-DSI display and it is powered by a 5V/3A USB power supply. When I turn on the LP, I see the bios post to the HDMI display and, shortly after, the backlight turns on on the MIPI display. Once Windows boots, the HDMI display matches the resolution and orientation of the MIPI display without any configuration, which seems to suggest that the display driver chip In order to get this far, however, I had to go into BIOS and change multiple settings.

The display uses an ILI9881C driver chip and, as far as I know, it should be interrogated on powerup and the correct display settings negotiated with the LP.

Can someone please help me figure out what I am doing wrong? Thank you.