projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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. | |
| 8b60756a RD |
57 | vmode:x - chooses PowerMacintosh video mode <x>. Deprecated. |
| 58 | cmode:x - chooses PowerMacintosh colour mode <x>. Deprecated. | |
| 1da177e4 LT |
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 <[email protected]> |