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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /Documentation/fb/aty128fb.txt | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'Documentation/fb/aty128fb.txt')
-rw-r--r-- | Documentation/fb/aty128fb.txt | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/Documentation/fb/aty128fb.txt b/Documentation/fb/aty128fb.txt new file mode 100644 index 00000000..b605204f --- /dev/null +++ b/Documentation/fb/aty128fb.txt @@ -0,0 +1,72 @@ +[This file is cloned from VesaFB/matroxfb] + +What is aty128fb? +================= + +This is a driver for a graphic framebuffer for ATI Rage128 based devices +on Intel and PPC boxes. + +Advantages: + + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts. + * You can run XF68_FBDev on top of /dev/fb0 + * Most important: boot logo :-) + +Disadvantages: + + * graphic mode is slower than text mode... but you should not notice + if you use same resolution as you used in textmode. + * still experimental. + + +How to use it? +============== + +Switching modes is done using the video=aty128fb:<resolution>... modedb +boot parameter or using `fbset' program. + +See Documentation/fb/modedb.txt for more information on modedb +resolutions. + +You should compile in both vgacon (to boot if you remove your Rage128 from +box) and aty128fb (for graphics mode). You should not compile-in vesafb +unless you have primary display on non-Rage128 VBE2.0 device (see +Documentation/fb/vesafb.txt for details). + + +X11 +=== + +XF68_FBDev should generally work fine, but it is non-accelerated. As of +this document, 8 and 32bpp works fine. There have been palette issues +when switching from X to console and back to X. You will have to restart +X to fix this. + + +Configuration +============= + +You can pass kernel command line options to vesafb with +`video=aty128fb:option1,option2:value2,option3' (multiple options should +be separated by comma, values are separated from options by `:'). +Accepted options: + +noaccel - do not use acceleration engine. It is default. +accel - use acceleration engine. Not finished. +vmode:x - chooses PowerMacintosh video mode <x>. Deprecated. +cmode:x - chooses PowerMacintosh colour mode <x>. Deprecated. +<XxX@X> - selects startup videomode. See modedb.txt for detailed + explanation. Default is 640x480x8bpp. + + +Limitations +=========== + +There are known and unknown bugs, features and misfeatures. +Currently there are following known bugs: + + This driver is still experimental and is not finished. Too many + bugs/errata to list here. + +-- +Brad Douglas <brad@neruo.com> |