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diff --git a/Documentation/fb/matroxfb.txt b/Documentation/fb/matroxfb.txt deleted file mode 100644 index b95f5bb522f2..000000000000 --- a/Documentation/fb/matroxfb.txt +++ /dev/null @@ -1,413 +0,0 @@ -[This file is cloned from VesaFB. Thanks go to Gerd Knorr] - -What is matroxfb? -================= - -This is a driver for a graphic framebuffer for Matrox devices on -Alpha, 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 XF{68,86}_FBDev or XFree86 fbdev driver 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. - - -How to use it? -============== - -Switching modes is done using the video=matroxfb:vesa:... boot parameter -or using `fbset' program. - -If you want, for example, enable a resolution of 1280x1024x24bpp you should -pass to the kernel this command line: "video=matroxfb:vesa:0x1BB". - -You should compile in both vgacon (to boot if you remove you Matrox from -box) and matroxfb (for graphics mode). You should not compile-in vesafb -unless you have primary display on non-Matrox VBE2.0 device (see -Documentation/fb/vesafb.txt for details). - -Currently supported video modes are (through vesa:... interface, PowerMac -has [as addon] compatibility code): - - -[Graphic modes] - -bpp | 640x400 640x480 768x576 800x600 960x720 -----+-------------------------------------------- - 4 | 0x12 0x102 - 8 | 0x100 0x101 0x180 0x103 0x188 - 15 | 0x110 0x181 0x113 0x189 - 16 | 0x111 0x182 0x114 0x18A - 24 | 0x1B2 0x184 0x1B5 0x18C - 32 | 0x112 0x183 0x115 0x18B - - -[Graphic modes (continued)] - -bpp | 1024x768 1152x864 1280x1024 1408x1056 1600x1200 -----+------------------------------------------------ - 4 | 0x104 0x106 - 8 | 0x105 0x190 0x107 0x198 0x11C - 15 | 0x116 0x191 0x119 0x199 0x11D - 16 | 0x117 0x192 0x11A 0x19A 0x11E - 24 | 0x1B8 0x194 0x1BB 0x19C 0x1BF - 32 | 0x118 0x193 0x11B 0x19B - - -[Text modes] - -text | 640x400 640x480 1056x344 1056x400 1056x480 ------+------------------------------------------------ - 8x8 | 0x1C0 0x108 0x10A 0x10B 0x10C -8x16 | 2, 3, 7 0x109 - -You can enter these number either hexadecimal (leading `0x') or decimal -(0x100 = 256). You can also use value + 512 to achieve compatibility -with your old number passed to vesafb. - -Non-listed number can be achieved by more complicated command-line, for -example 1600x1200x32bpp can be specified by `video=matroxfb:vesa:0x11C,depth:32'. - - -X11 -=== - -XF{68,86}_FBDev should work just fine, but it is non-accelerated. On non-intel -architectures there are some glitches for 24bpp videomodes. 8, 16 and 32bpp -works fine. - -Running another (accelerated) X-Server like XF86_SVGA works too. But (at least) -XFree servers have big troubles in multihead configurations (even on first -head, not even talking about second). Running XFree86 4.x accelerated mga -driver is possible, but you must not enable DRI - if you do, resolution and -color depth of your X desktop must match resolution and color depths of your -virtual consoles, otherwise X will corrupt accelerator settings. - - -SVGALib -======= - -Driver contains SVGALib compatibility code. It is turned on by choosing textual -mode for console. You can do it at boot time by using videomode -2,3,7,0x108-0x10C or 0x1C0. At runtime, `fbset -depth 0' does this work. -Unfortunately, after SVGALib application exits, screen contents is corrupted. -Switching to another console and back fixes it. I hope that it is SVGALib's -problem and not mine, but I'm not sure. - - -Configuration -============= - -You can pass kernel command line options to matroxfb with -`video=matroxfb:option1,option2:value2,option3' (multiple options should be -separated by comma, values are separated from options by `:'). -Accepted options: - -mem:X - size of memory (X can be in megabytes, kilobytes or bytes) - You can only decrease value determined by driver because of - it always probe for memory. Default is to use whole detected - memory usable for on-screen display (i.e. max. 8 MB). -disabled - do not load driver; you can use also `off', but `disabled' - is here too. -enabled - load driver, if you have `video=matroxfb:disabled' in LILO - configuration, you can override it by this (you cannot override - `off'). It is default. -noaccel - do not use acceleration engine. It does not work on Alphas. -accel - use acceleration engine. It is default. -nopan - create initial consoles with vyres = yres, thus disabling virtual - scrolling. -pan - create initial consoles as tall as possible (vyres = memory/vxres). - It is default. -nopciretry - disable PCI retries. It is needed for some broken chipsets, - it is autodetected for intel's 82437. In this case device does - not comply to PCI 2.1 specs (it will not guarantee that every - transaction terminate with success or retry in 32 PCLK). -pciretry - enable PCI retries. It is default, except for intel's 82437. -novga - disables VGA I/O ports. It is default if BIOS did not enable device. - You should not use this option, some boards then do not restart - without power off. -vga - preserve state of VGA I/O ports. It is default. Driver does not - enable VGA I/O if BIOS did not it (it is not safe to enable it in - most cases). -nobios - disables BIOS ROM. It is default if BIOS did not enable BIOS itself. - You should not use this option, some boards then do not restart - without power off. -bios - preserve state of BIOS ROM. It is default. Driver does not enable - BIOS if BIOS was not enabled before. -noinit - tells driver, that devices were already initialized. You should use - it if you have G100 and/or if driver cannot detect memory, you see - strange pattern on screen and so on. Devices not enabled by BIOS - are still initialized. It is default. -init - driver initializes every device it knows about. -memtype - specifies memory type, implies 'init'. This is valid only for G200 - and G400 and has following meaning: - G200: 0 -> 2x128Kx32 chips, 2MB onboard, probably sgram - 1 -> 2x128Kx32 chips, 4MB onboard, probably sgram - 2 -> 2x256Kx32 chips, 4MB onboard, probably sgram - 3 -> 2x256Kx32 chips, 8MB onboard, probably sgram - 4 -> 2x512Kx16 chips, 8/16MB onboard, probably sdram only - 5 -> same as above - 6 -> 4x128Kx32 chips, 4MB onboard, probably sgram - 7 -> 4x128Kx32 chips, 8MB onboard, probably sgram - G400: 0 -> 2x512Kx16 SDRAM, 16/32MB - 2x512Kx32 SGRAM, 16/32MB - 1 -> 2x256Kx32 SGRAM, 8/16MB - 2 -> 4x128Kx32 SGRAM, 8/16MB - 3 -> 4x512Kx32 SDRAM, 32MB - 4 -> 4x256Kx32 SGRAM, 16/32MB - 5 -> 2x1Mx32 SDRAM, 32MB - 6 -> reserved - 7 -> reserved - You should use sdram or sgram parameter in addition to memtype - parameter. -nomtrr - disables write combining on frame buffer. This slows down driver but - there is reported minor incompatibility between GUS DMA and XFree - under high loads if write combining is enabled (sound dropouts). -mtrr - enables write combining on frame buffer. It speeds up video accesses - much. It is default. You must have MTRR support enabled in kernel - and your CPU must have MTRR (f.e. Pentium II have them). -sgram - tells to driver that you have Gxx0 with SGRAM memory. It has no - effect without `init'. -sdram - tells to driver that you have Gxx0 with SDRAM memory. - It is a default. -inv24 - change timings parameters for 24bpp modes on Millennium and - Millennium II. Specify this if you see strange color shadows around - characters. -noinv24 - use standard timings. It is the default. -inverse - invert colors on screen (for LCD displays) -noinverse - show true colors on screen. It is default. -dev:X - bind driver to device X. Driver numbers device from 0 up to N, - where device 0 is first `known' device found, 1 second and so on. - lspci lists devices in this order. - Default is `every' known device. -nohwcursor - disables hardware cursor (use software cursor instead). -hwcursor - enables hardware cursor. It is default. If you are using - non-accelerated mode (`noaccel' or `fbset -accel false'), software - cursor is used (except for text mode). -noblink - disables cursor blinking. Cursor in text mode always blinks (hw - limitation). -blink - enables cursor blinking. It is default. -nofastfont - disables fastfont feature. It is default. -fastfont:X - enables fastfont feature. X specifies size of memory reserved for - font data, it must be >= (fontwidth*fontheight*chars_in_font)/8. - It is faster on Gx00 series, but slower on older cards. -grayscale - enable grayscale summing. It works in PSEUDOCOLOR modes (text, - 4bpp, 8bpp). In DIRECTCOLOR modes it is limited to characters - displayed through putc/putcs. Direct accesses to framebuffer - can paint colors. -nograyscale - disable grayscale summing. It is default. -cross4MB - enables that pixel line can cross 4MB boundary. It is default for - non-Millennium. -nocross4MB - pixel line must not cross 4MB boundary. It is default for - Millennium I or II, because of these devices have hardware - limitations which do not allow this. But this option is - incompatible with some (if not all yet released) versions of - XF86_FBDev. -dfp - enables digital flat panel interface. This option is incompatible with - secondary (TV) output - if DFP is active, TV output must be - inactive and vice versa. DFP always uses same timing as primary - (monitor) output. -dfp:X - use settings X for digital flat panel interface. X is number from - 0 to 0xFF, and meaning of each individual bit is described in - G400 manual, in description of DAC register 0x1F. For normal operation - you should set all bits to zero, except lowest bit. This lowest bit - selects who is source of display clocks, whether G400, or panel. - Default value is now read back from hardware - so you should specify - this value only if you are also using `init' parameter. -outputs:XYZ - set mapping between CRTC and outputs. Each letter can have value - of 0 (for no CRTC), 1 (CRTC1) or 2 (CRTC2), and first letter corresponds - to primary analog output, second letter to the secondary analog output - and third letter to the DVI output. Default setting is 100 for - cards below G400 or G400 without DFP, 101 for G400 with DFP, and - 111 for G450 and G550. You can set mapping only on first card, - use matroxset for setting up other devices. -vesa:X - selects startup videomode. X is number from 0 to 0x1FF, see table - above for detailed explanation. Default is 640x480x8bpp if driver - has 8bpp support. Otherwise first available of 640x350x4bpp, - 640x480x15bpp, 640x480x24bpp, 640x480x32bpp or 80x25 text - (80x25 text is always available). - -If you are not satisfied with videomode selected by `vesa' option, you -can modify it with these options: - -xres:X - horizontal resolution, in pixels. Default is derived from `vesa' - option. -yres:X - vertical resolution, in pixel lines. Default is derived from `vesa' - option. -upper:X - top boundary: lines between end of VSYNC pulse and start of first - pixel line of picture. Default is derived from `vesa' option. -lower:X - bottom boundary: lines between end of picture and start of VSYNC - pulse. Default is derived from `vesa' option. -vslen:X - length of VSYNC pulse, in lines. Default is derived from `vesa' - option. -left:X - left boundary: pixels between end of HSYNC pulse and first pixel. - Default is derived from `vesa' option. -right:X - right boundary: pixels between end of picture and start of HSYNC - pulse. Default is derived from `vesa' option. -hslen:X - length of HSYNC pulse, in pixels. Default is derived from `vesa' - option. -pixclock:X - dotclocks, in ps (picoseconds). Default is derived from `vesa' - option and from `fh' and `fv' options. -sync:X - sync. pulse - bit 0 inverts HSYNC polarity, bit 1 VSYNC polarity. - If bit 3 (value 0x08) is set, composite sync instead of HSYNC is - generated. If bit 5 (value 0x20) is set, sync on green is turned on. - Do not forget that if you want sync on green, you also probably - want composite sync. - Default depends on `vesa'. -depth:X - Bits per pixel: 0=text, 4,8,15,16,24 or 32. Default depends on - `vesa'. - -If you know capabilities of your monitor, you can specify some (or all) of -`maxclk', `fh' and `fv'. In this case, `pixclock' is computed so that -pixclock <= maxclk, real_fh <= fh and real_fv <= fv. - -maxclk:X - maximum dotclock. X can be specified in MHz, kHz or Hz. Default is - `don't care'. -fh:X - maximum horizontal synchronization frequency. X can be specified - in kHz or Hz. Default is `don't care'. -fv:X - maximum vertical frequency. X must be specified in Hz. Default is - 70 for modes derived from `vesa' with yres <= 400, 60Hz for - yres > 400. - - -Limitations -=========== - -There are known and unknown bugs, features and misfeatures. -Currently there are following known bugs: - + SVGALib does not restore screen on exit - + generic fbcon-cfbX procedures do not work on Alphas. Due to this, - `noaccel' (and cfb4 accel) driver does not work on Alpha. So everyone - with access to /dev/fb* on Alpha can hang machine (you should restrict - access to /dev/fb* - everyone with access to this device can destroy - your monitor, believe me...). - + 24bpp does not support correctly XF-FBDev on big-endian architectures. - + interlaced text mode is not supported; it looks like hardware limitation, - but I'm not sure. - + Gxx0 SGRAM/SDRAM is not autodetected. - + If you are using more than one framebuffer device, you must boot kernel - with 'video=scrollback:0'. - + maybe more... -And following misfeatures: - + SVGALib does not restore screen on exit. - + pixclock for text modes is limited by hardware to - 83 MHz on G200 - 66 MHz on Millennium I - 60 MHz on Millennium II - Because I have no access to other devices, I do not know specific - frequencies for them. So driver does not check this and allows you to - set frequency higher that this. It causes sparks, black holes and other - pretty effects on screen. Device was not destroyed during tests. :-) - + my Millennium G200 oscillator has frequency range from 35 MHz to 380 MHz - (and it works with 8bpp on about 320 MHz dotclocks (and changed mclk)). - But Matrox says on product sheet that VCO limit is 50-250 MHz, so I believe - them (maybe that chip overheats, but it has a very big cooler (G100 has - none), so it should work). - + special mixed video/graphics videomodes of Mystique and Gx00 - 2G8V16 and - G16V16 are not supported - + color keying is not supported - + feature connector of Mystique and Gx00 is set to VGA mode (it is disabled - by BIOS) - + DDC (monitor detection) is supported through dualhead driver - + some check for input values are not so strict how it should be (you can - specify vslen=4000 and so on). - + maybe more... -And following features: - + 4bpp is available only on Millennium I and Millennium II. It is hardware - limitation. - + selection between 1:5:5:5 and 5:6:5 16bpp videomode is done by -rgba - option of fbset: "fbset -depth 16 -rgba 5,5,5" selects 1:5:5:5, anything - else selects 5:6:5 mode. - + text mode uses 6 bit VGA palette instead of 8 bit (one of 262144 colors - instead of one of 16M colors). It is due to hardware limitation of - Millennium I/II and SVGALib compatibility. - - -Benchmarks -========== -It is time to redraw whole screen 1000 times in 1024x768, 60Hz. It is -time for draw 6144000 characters on screen through /dev/vcsa -(for 32bpp it is about 3GB of data (exactly 3000 MB); for 8x16 font in -16 seconds, i.e. 187 MBps). -Times were obtained from one older version of driver, now they are about 3% -faster, it is kernel-space only time on P-II/350 MHz, Millennium I in 33 MHz -PCI slot, G200 in AGP 2x slot. I did not test vgacon. - -NOACCEL - 8x16 12x22 - Millennium I G200 Millennium I G200 -8bpp 16.42 9.54 12.33 9.13 -16bpp 21.00 15.70 19.11 15.02 -24bpp 36.66 36.66 35.00 35.00 -32bpp 35.00 30.00 33.85 28.66 - -ACCEL, nofastfont - 8x16 12x22 6x11 - Millennium I G200 Millennium I G200 Millennium I G200 -8bpp 7.79 7.24 13.55 7.78 30.00 21.01 -16bpp 9.13 7.78 16.16 7.78 30.00 21.01 -24bpp 14.17 10.72 18.69 10.24 34.99 21.01 -32bpp 16.15 16.16 18.73 13.09 34.99 21.01 - -ACCEL, fastfont - 8x16 12x22 6x11 - Millennium I G200 Millennium I G200 Millennium I G200 -8bpp 8.41 6.01 6.54 4.37 16.00 10.51 -16bpp 9.54 9.12 8.76 6.17 17.52 14.01 -24bpp 15.00 12.36 11.67 10.00 22.01 18.32 -32bpp 16.18 18.29* 12.71 12.74 24.44 21.00 - -TEXT - 8x16 - Millennium I G200 -TEXT 3.29 1.50 - -* Yes, it is slower than Millennium I. - - -Dualhead G400 -============= -Driver supports dualhead G400 with some limitations: - + secondary head shares videomemory with primary head. It is not problem - if you have 32MB of videoram, but if you have only 16MB, you may have - to think twice before choosing videomode (for example twice 1880x1440x32bpp - is not possible). - + due to hardware limitation, secondary head can use only 16 and 32bpp - videomodes. - + secondary head is not accelerated. There were bad problems with accelerated - XFree when secondary head used to use acceleration. - + secondary head always powerups in 640x480@60-32 videomode. You have to use - fbset to change this mode. - + secondary head always powerups in monitor mode. You have to use fbmatroxset - to change it to TV mode. Also, you must select at least 525 lines for - NTSC output and 625 lines for PAL output. - + kernel is not fully multihead ready. So some things are impossible to do. - + if you compiled it as module, you must insert i2c-matroxfb, matroxfb_maven - and matroxfb_crtc2 into kernel. - - -Dualhead G450 -============= -Driver supports dualhead G450 with some limitations: - + secondary head shares videomemory with primary head. It is not problem - if you have 32MB of videoram, but if you have only 16MB, you may have - to think twice before choosing videomode. - + due to hardware limitation, secondary head can use only 16 and 32bpp - videomodes. - + secondary head is not accelerated. - + secondary head always powerups in 640x480@60-32 videomode. You have to use - fbset to change this mode. - + TV output is not supported - + kernel is not fully multihead ready, so some things are impossible to do. - + if you compiled it as module, you must insert matroxfb_g450 and matroxfb_crtc2 - into kernel. - --- -Petr Vandrovec <vandrove@vc.cvut.cz> |
