diff options
Diffstat (limited to 'Documentation/fb/sstfb.txt')
| -rw-r--r-- | Documentation/fb/sstfb.txt | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/Documentation/fb/sstfb.txt b/Documentation/fb/sstfb.txt deleted file mode 100644 index 13db1075e4a5..000000000000 --- a/Documentation/fb/sstfb.txt +++ /dev/null @@ -1,174 +0,0 @@ - -Introduction - - This is a frame buffer device driver for 3dfx' Voodoo Graphics - (aka voodoo 1, aka sst1) and Voodoo² (aka Voodoo 2, aka CVG) based - video boards. It's highly experimental code, but is guaranteed to work - on my computer, with my "Maxi Gamer 3D" and "Maxi Gamer 3d²" boards, - and with me "between chair and keyboard". Some people tested other - combinations and it seems that it works. - The main page is located at <http://sstfb.sourceforge.net>, and if - you want the latest version, check out the CVS, as the driver is a work - in progress, I feel uncomfortable with releasing tarballs of something - not completely working...Don't worry, it's still more than usable - (I eat my own dog food) - - Please read the Bug section, and report any success or failure to me - (Ghozlane Toumi <gtoumi@laposte.net>). - BTW, If you have only one monitor , and you don't feel like playing - with the vga passthrou cable, I can only suggest borrowing a screen - somewhere... - - -Installation - - This driver (should) work on ix86, with "late" 2.2.x kernel (tested - with x = 19) and "recent" 2.4.x kernel, as a module or compiled in. - It has been included in mainstream kernel since the infamous 2.4.10. - You can apply the patches found in sstfb/kernel/*-2.{2|4}.x.patch, - and copy sstfb.c to linux/drivers/video/, or apply a single patch, - sstfb/patch-2.{2|4}.x-sstfb-yymmdd to your linux source tree. - - Then configure your kernel as usual: choose "m" or "y" to 3Dfx Voodoo - Graphics in section "console". Compile, install, have fun... and please - drop me a report :) - - -Module Usage - - Warnings. - # You should read completely this section before issuing any command. - # If you have only one monitor to play with, once you insmod the - module, the 3dfx takes control of the output, so you'll have to - plug the monitor to the "normal" video board in order to issue - the commands, or you can blindly use sst_dbg_vgapass - in the tools directory (See Tools). The latest solution is pass the - parameter vgapass=1 when insmodding the driver. (See Kernel/Modules - Options) - - Module insertion: - # insmod sstfb.o - you should see some strange output from the board: - a big blue square, a green and a red small squares and a vertical - white rectangle. why? the function's name is self-explanatory: - "sstfb_test()"... - (if you don't have a second monitor, you'll have to plug your monitor - directly to the 2D videocard to see what you're typing) - # con2fb /dev/fbx /dev/ttyx - bind a tty to the new frame buffer. if you already have a frame - buffer driver, the voodoo fb will likely be /dev/fb1. if not, - the device will be /dev/fb0. You can check this by doing a - cat /proc/fb. You can find a copy of con2fb in tools/ directory. - if you don't have another fb device, this step is superfluous, - as the console subsystem automagicaly binds ttys to the fb. - # switch to the virtual console you just mapped. "tadaaa" ... - - Module removal: - # con2fb /dev/fbx /dev/ttyx - bind the tty to the old frame buffer so the module can be removed. - (how does it work with vgacon ? short answer : it doesn't work) - # rmmod sstfb - - -Kernel/Modules Options - - You can pass some options to the sstfb module, and via the kernel - command line when the driver is compiled in: - for module : insmod sstfb.o option1=value1 option2=value2 ... - in kernel : video=sstfb:option1,option2:value2,option3 ... - - sstfb supports the following options : - -Module Kernel Description - -vgapass=0 vganopass Enable or disable VGA passthrou cable. -vgapass=1 vgapass When enabled, the monitor will get the signal - from the VGA board and not from the voodoo. - Default: nopass - -mem=x mem:x Force frame buffer memory in MiB - allowed values: 0, 1, 2, 4. - Default: 0 (= autodetect) - -inverse=1 inverse Supposed to enable inverse console. - doesn't work yet... - -clipping=1 clipping Enable or disable clipping. -clipping=0 noclipping With clipping enabled, all offscreen - reads and writes are discarded. - Default: enable clipping. - -gfxclk=x gfxclk:x Force graphic clock frequency (in MHz). - Be careful with this option, it may be - DANGEROUS. - Default: auto - 50Mhz for Voodoo 1, - 75MHz for Voodoo 2. - -slowpci=1 fastpci Enable or disable fast PCI read/writes. -slowpci=1 slowpci Default : fastpci - -dev=x dev:x Attach the driver to device number x. - 0 is the first compatible board (in - lspci order) - -Tools - - These tools are mostly for debugging purposes, but you can - find some of these interesting : - - con2fb , maps a tty to a fbramebuffer . - con2fb /dev/fb1 /dev/tty5 - - sst_dbg_vgapass , changes vga passthrou. You have to recompile the - driver with SST_DEBUG and SST_DEBUG_IOCTL set to 1 - sst_dbg_vgapass /dev/fb1 1 (enables vga cable) - sst_dbg_vgapass /dev/fb1 0 (disables vga cable) - - glide_reset , resets the voodoo using glide - use this after rmmoding sstfb, if the module refuses to - reinsert . - -Bugs - - - DO NOT use glide while the sstfb module is in, you'll most likely - hang your computer. - - If you see some artefacts (pixels not cleaning and stuff like that), - try turning off clipping (clipping=0), and/or using slowpci - - the driver don't detect the 4Mb frame buffer voodoos, it seems that - the 2 last Mbs wrap around. looking into that . - - The driver is 16 bpp only, 24/32 won't work. - - The driver is not your_favorite_toy-safe. this includes SMP... - [Actually from inspection it seems to be safe - Alan] - - When using XFree86 FBdev (X over fbdev) you may see strange color - patterns at the border of your windows (the pixels lose the lowest - byte -> basically the blue component and some of the green). I'm unable - to reproduce this with XFree86-3.3, but one of the testers has this - problem with XFree86-4. Apparently recent Xfree86-4.x solve this - problem. - - I didn't really test changing the palette, so you may find some weird - things when playing with that. - - Sometimes the driver will not recognise the DAC, and the - initialisation will fail. This is specifically true for - voodoo 2 boards, but it should be solved in recent versions. Please - contact me. - - The 24/32 is not likely to work anytime soon, knowing that the - hardware does ... unusual things in 24/32 bpp. - - When used with another video board, current limitations of the linux - console subsystem can cause some troubles, specifically, you should - disable software scrollback, as it can oops badly ... - -Todo - - - Get rid of the previous paragraph. - - Buy more coffee. - - test/port to other arch. - - try to add panning using tweeks with front and back buffer . - - try to implement accel on voodoo2, this board can actually do a - lot in 2D even if it was sold as a 3D only board ... - -ghoz. - --- -Ghozlane Toumi <gtoumi@laposte.net> - - -$Date: 2002/05/09 20:11:45 $ -http://sstfb.sourceforge.net/README |