I've given up waiting for someone to implement support for these ioctls on another platform before they're merged, but I have received a lot of feedback on the interfaces, and it sounds like they're ok. I've also fixed all the remaining issues I'm aware of on SNB platforms and things are working well, so I'm just going to push them out. (Note IVB support is still missing a few bits for scaling and such; I'll fix those up when I get back home and can test on IVB again.)
One change you may notice from the last set is that I've removed the 'zpos' parameter. Plane blending and z ordering is very chipset specific (it even varies between Intel chipsets), so exposing it through a device specific ioctl is probably a better plan. By default, planes should just overlay the primary plane; a device specific ioctl (none available yet, but I have some planned for i915) can provide more flexibility.
To recap previous posts, this patchset provides a few new interfaces: - addfb2 - a new FB creation ioctl that lets you specify a surface format, as defined by a fourcc code from the video4linux headers (libdrm will wrap these in DRM_ macros for portability) - planes - ioctls for fetching plane info and attaching an fb to a plane; note there's no separate flip ioctl for planes, just use setplane to update the fb
The testdisplay.c program in intel-gpu-tools has support for testing these interfaces, and I'll be fixing up and pushing the xf86-video-intel support soon as well, so you can use either as a reference for how the new interfaces work.
Thanks, Jesse