Documentation/fb/aty128fb.rst

   1 =================
   2 What is aty128fb?
   3 =================
   4
   5 .. [This file is cloned from VesaFB/matroxfb]
   6
   7 This is a driver for a graphic framebuffer for ATI Rage128 based devices
   8 on Intel and PPC boxes.
   9
  10 Advantages:
  11
  12  * It provides a nice large console (128 cols + 48 lines with 1024x768)
  13    without using tiny, unreadable fonts.
  14  * You can run XF68_FBDev on top of /dev/fb0
  15  * Most important: boot logo :-)
  16
  17 Disadvantages:
  18
  19  * graphic mode is slower than text mode... but you should not notice
  20    if you use same resolution as you used in textmode.
  21  * still experimental.
  22
  23
  24 How to use it?
  25 ==============
  26
  27 Switching modes is done using the  video=aty128fb:<resolution>... modedb
  28 boot parameter or using `fbset` program.
  29
  30 See Documentation/fb/modedb.rst for more information on modedb
  31 resolutions.
  32
  33 You should compile in both vgacon (to boot if you remove your Rage128 from
  34 box) and aty128fb (for graphics mode). You should not compile-in vesafb
  35 unless you have primary display on non-Rage128 VBE2.0 device (see
  36 Documentation/fb/vesafb.rst for details).
  37
  38
  39 X11
  40 ===
  41
  42 XF68_FBDev should generally work fine, but it is non-accelerated. As of
  43 this document, 8 and 32bpp works fine.  There have been palette issues
  44 when switching from X to console and back to X.  You will have to restart
  45 X to fix this.
  46
  47
  48 Configuration
  49 =============
  50
  51 You can pass kernel command line options to vesafb with
  52 `video=aty128fb:option1,option2:value2,option3` (multiple options should
  53 be separated by comma, values are separated from options by `:`).
  54 Accepted options:
  55
  56 ========= =======================================================
  57 noaccel   do not use acceleration engine. It is default.
  58 accel     use acceleration engine. Not finished.
  59 vmode:x   chooses PowerMacintosh video mode <x>. Deprecated.
  60 cmode:x   chooses PowerMacintosh colour mode <x>. Deprecated.
  61 <XxX@X>   selects startup videomode. See modedb.txt for detailed
  62           explanation. Default is 640x480x8bpp.
  63 ========= =======================================================
  64
  65
  66 Limitations
  67 ===========
  68
  69 There are known and unknown bugs, features and misfeatures.
  70 Currently there are following known bugs:
  71
  72  - This driver is still experimental and is not finished.  Too many
  73    bugs/errata to list here.
  74
  75 Brad Douglas <brad@neruo.com>