I just DIYed a HMD and made a custom openvr driver for it. But it doesn't work:

1. The vrcompositor always rendered to my primary display (plugged in the DVI port) instead of the HMD (HDMI port) in extended mode.
2. How can I tell vrcompositor, vrserver and vrmonitor that the HMD is in direct mode when I initialize the device driver to direct mode? How can I get the D3D device and context to render to the compositor window?
3. Could I made my own compoistor? Then how incorporate it to steamvr.

Any input is highly appreciated. Thanks