> What is your problem with discontigous framebuffers? (I assume discontigous > refers to the pages the framebuffer is composed of) > Sounds to me like you should implement your own fb_mmap and either map it > contigous to screen_base or implement your own fb_read/write. > In theory you could even have each pixel at a completely different memory > location although some userspace wouldn't be happy when it could no longer > mmap > the framebuffer.
The mmap side is trivial, the problem is that the fb layer default implementations of blits, fills etc only work on a kernel linear frame buffer. And (for example) there is not enough linear stolen memory on some Intel video for a 1080p console on HDMI even though the hardware is perfectly capable of using an HDTV as its monitor. Nor - on a 32bit box- is there enough space to vremap it. Alan
