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/tgafb.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!
Diffstat (limited to 'Documentation/fb/tgafb.txt')
-rw-r--r-- | Documentation/fb/tgafb.txt | 69 |
1 files changed, 69 insertions, 0 deletions
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1 | $Id: tgafb.txt,v 1.1.2.2 2000/04/04 06:50:18 mato Exp $ | ||
2 | |||
3 | What is tgafb? | ||
4 | =============== | ||
5 | |||
6 | This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA | ||
7 | cards, which are usually found in older Digital Alpha systems. The | ||
8 | following models are supported: | ||
9 | |||
10 | ZLxP-E1 (8bpp, 2 MB VRAM) | ||
11 | ZLxP-E2 (32bpp, 8 MB VRAM) | ||
12 | ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer) | ||
13 | |||
14 | This version is an almost complete rewrite of the code written by Geert | ||
15 | Uytterhoeven, which was based on the original TGA console code written by | ||
16 | Jay Estabrook. | ||
17 | |||
18 | Major new features since Linux 2.0.x: | ||
19 | |||
20 | * Support for multiple resolutions | ||
21 | * Support for fixed-frequency and other oddball monitors | ||
22 | (by allowing the video mode to be set at boot time) | ||
23 | |||
24 | User-visible changes since Linux 2.2.x: | ||
25 | |||
26 | * Sync-on-green is now handled properly | ||
27 | * More useful information is printed on bootup | ||
28 | (this helps if people run into problems) | ||
29 | |||
30 | This driver does not (yet) support the TGA2 family of framebuffers, so the | ||
31 | PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These | ||
32 | can however be used with the standard VGA Text Console driver. | ||
33 | |||
34 | |||
35 | Configuration | ||
36 | ============= | ||
37 | |||
38 | You can pass kernel command line options to tgafb with | ||
39 | `video=tgafb:option1,option2:value2,option3' (multiple options should be | ||
40 | separated by comma, values are separated from options by `:'). | ||
41 | Accepted options: | ||
42 | |||
43 | font:X - default font to use. All fonts are supported, including the | ||
44 | SUN12x22 font which is very nice at high resolutions. | ||
45 | |||
46 | mode:X - default video mode. The following video modes are supported: | ||
47 | 640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72, | ||
48 | 1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76, | ||
49 | 1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70, | ||
50 | 1152x864-84, 1280x1024-76, 1280x1024-85 | ||
51 | |||
52 | |||
53 | Known Issues | ||
54 | ============ | ||
55 | |||
56 | The XFree86 FBDev server has been reported not to work, since tgafb doesn't do | ||
57 | mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for | ||
58 | me, however this server does not do acceleration, which make certain operations | ||
59 | quite slow. Support for acceleration is being progressively integrated in | ||
60 | XFree86 4.x. | ||
61 | |||
62 | When running tgafb in resolutions higher than 640x480, on switching VCs from | ||
63 | tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually | ||
64 | refreshed. This is an X server problem, not a tgafb problem, and is fixed in | ||
65 | XFree86 4.0. | ||
66 | |||
67 | Enjoy! | ||
68 | |||
69 | Martin Lucina <mato@kotelna.sk> | ||