diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/fb/aty128fb.txt |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
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1 | [This file is cloned from VesaFB/matroxfb] | ||
2 | |||
3 | What is aty128fb? | ||
4 | ================= | ||
5 | |||
6 | This is a driver for a graphic framebuffer for ATI Rage128 based devices | ||
7 | on Intel and PPC boxes. | ||
8 | |||
9 | Advantages: | ||
10 | |||
11 | * It provides a nice large console (128 cols + 48 lines with 1024x768) | ||
12 | without using tiny, unreadable fonts. | ||
13 | * You can run XF68_FBDev on top of /dev/fb0 | ||
14 | * Most important: boot logo :-) | ||
15 | |||
16 | Disadvantages: | ||
17 | |||
18 | * graphic mode is slower than text mode... but you should not notice | ||
19 | if you use same resolution as you used in textmode. | ||
20 | * still experimental. | ||
21 | |||
22 | |||
23 | How to use it? | ||
24 | ============== | ||
25 | |||
26 | Switching modes is done using the video=aty128fb:<resolution>... modedb | ||
27 | boot parameter or using `fbset' program. | ||
28 | |||
29 | See Documentation/fb/modedb.txt for more information on modedb | ||
30 | resolutions. | ||
31 | |||
32 | You should compile in both vgacon (to boot if you remove your Rage128 from | ||
33 | box) and aty128fb (for graphics mode). You should not compile-in vesafb | ||
34 | unless you have primary display on non-Rage128 VBE2.0 device (see | ||
35 | Documentation/fb/vesafb.txt for details). | ||
36 | |||
37 | |||
38 | X11 | ||
39 | === | ||
40 | |||
41 | XF68_FBDev should generally work fine, but it is non-accelerated. As of | ||
42 | this document, 8 and 32bpp works fine. There have been palette issues | ||
43 | when switching from X to console and back to X. You will have to restart | ||
44 | X to fix this. | ||
45 | |||
46 | |||
47 | Configuration | ||
48 | ============= | ||
49 | |||
50 | You can pass kernel command line options to vesafb with | ||
51 | `video=aty128fb:option1,option2:value2,option3' (multiple options should | ||
52 | be separated by comma, values are separated from options by `:'). | ||
53 | Accepted options: | ||
54 | |||
55 | noaccel - do not use acceleration engine. It is default. | ||
56 | accel - use acceleration engine. Not finished. | ||
57 | vmode:x - chooses PowerMacintosh video mode <x>. Depreciated. | ||
58 | cmode:x - chooses PowerMacintosh colour mode <x>. Depreciated. | ||
59 | <XxX@X> - selects startup videomode. See modedb.txt for detailed | ||
60 | explanation. Default is 640x480x8bpp. | ||
61 | |||
62 | |||
63 | Limitations | ||
64 | =========== | ||
65 | |||
66 | There are known and unknown bugs, features and misfeatures. | ||
67 | Currently there are following known bugs: | ||
68 | + This driver is still experimental and is not finished. Too many | ||
69 | bugs/errata to list here. | ||
70 | |||
71 | -- | ||
72 | Brad Douglas <brad@neruo.com> | ||