diff options
| author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
| commit | fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 (patch) | |
| tree | 22962a4387943edc841c72a4e636a068c66d58fd /Documentation/fb | |
| download | ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.zip ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.tar.gz | |
Initial import of modified Linux 2.6.28 tree
Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
Diffstat (limited to 'Documentation/fb')
40 files changed, 5309 insertions, 0 deletions
diff --git a/Documentation/fb/00-INDEX b/Documentation/fb/00-INDEX new file mode 100644 index 0000000..caabbd3 --- /dev/null +++ b/Documentation/fb/00-INDEX @@ -0,0 +1,53 @@ +Index of files in Documentation/fb. If you think something about frame +buffer devices needs an entry here, needs correction or you've written one +please mail me. + Geert Uytterhoeven <geert@linux-m68k.org> + +00-INDEX + - this file +arkfb.txt + - info on the fbdev driver for ARK Logic chips. +aty128fb.txt + - info on the ATI Rage128 frame buffer driver. +cirrusfb.txt + - info on the driver for Cirrus Logic chipsets. +cyblafb/ + - directory with documentation files related to the cyblafb driver. +deferred_io.txt + - an introduction to deferred IO. +fbcon.txt + - intro to and usage guide for the framebuffer console (fbcon). +framebuffer.txt + - introduction to frame buffer devices. +imacfb.txt + - info on the generic EFI platform driver for Intel based Macs. +intel810.txt + - documentation for the Intel 810/815 framebuffer driver. +intelfb.txt + - docs for Intel 830M/845G/852GM/855GM/865G/915G/945G fb driver. +internals.txt + - quick overview of frame buffer device internals. +matroxfb.txt + - info on the Matrox framebuffer driver for Alpha, Intel and PPC. +modedb.txt + - info on the video mode database. +matroxfb.txt + - info on the Matrox frame buffer driver. +pvr2fb.txt + - info on the PowerVR 2 frame buffer driver. +pxafb.txt + - info on the driver for the PXA25x LCD controller. +s3fb.txt + - info on the fbdev driver for S3 Trio/Virge chips. +sa1100fb.txt + - information about the driver for the SA-1100 LCD controller. +sisfb.txt + - info on the framebuffer device driver for various SiS chips. +sstfb.txt + - info on the frame buffer driver for 3dfx' Voodoo Graphics boards. +tgafb.txt + - info on the TGA (DECChip 21030) frame buffer driver +vesafb.txt + - info on the VESA frame buffer device +vt8623fb.txt + - info on the fb driver for the graphics core in VIA VT8623 chipsets. diff --git a/Documentation/fb/arkfb.txt b/Documentation/fb/arkfb.txt new file mode 100644 index 0000000..e8487a9 --- /dev/null +++ b/Documentation/fb/arkfb.txt @@ -0,0 +1,68 @@ + + arkfb - fbdev driver for ARK Logic chips + ======================================== + + +Supported Hardware +================== + + ARK 2000PV chip + ICS 5342 ramdac + + - only BIOS initialized VGA devices supported + - probably not working on big endian + + +Supported Features +================== + + * 4 bpp pseudocolor modes (with 18bit palette, two variants) + * 8 bpp pseudocolor mode (with 18bit palette) + * 16 bpp truecolor modes (RGB 555 and RGB 565) + * 24 bpp truecolor mode (RGB 888) + * 32 bpp truecolor mode (RGB 888) + * text mode (activated by bpp = 0) + * doublescan mode variant (not available in text mode) + * panning in both directions + * suspend/resume support + +Text mode is supported even in higher resolutions, but there is limitation to +lower pixclocks (i got maximum about 70 MHz, it is dependent on specific +hardware). This limitation is not enforced by driver. Text mode supports 8bit +wide fonts only (hardware limitation) and 16bit tall fonts (driver +limitation). Unfortunately character attributes (like color) in text mode are +broken for unknown reason, so its usefulness is limited. + +There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with +packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode +with interleaved planes (1 byte interleave), MSB first. Both modes support +8bit wide fonts only (driver limitation). + +Suspend/resume works on systems that initialize video card during resume and +if device is active (for example used by fbcon). + + +Missing Features +================ +(alias TODO list) + + * secondary (not initialized by BIOS) device support + * big endian support + * DPMS support + * MMIO support + * interlaced mode variant + * support for fontwidths != 8 in 4 bpp modes + * support for fontheight != 16 in text mode + * hardware cursor + * vsync synchronization + * feature connector support + * acceleration support (8514-like 2D) + + +Known bugs +========== + + * character attributes (and cursor) in text mode are broken + +-- +Ondrej Zajicek <santiago@crfreenet.org> diff --git a/Documentation/fb/aty128fb.txt b/Documentation/fb/aty128fb.txt new file mode 100644 index 0000000..b605204 --- /dev/null +++ b/Documentation/fb/aty128fb.txt @@ -0,0 +1,72 @@ +[This file is cloned from VesaFB/matroxfb] + +What is aty128fb? +================= + +This is a driver for a graphic framebuffer for ATI Rage128 based devices +on 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 XF68_FBDev 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. + * still experimental. + + +How to use it? +============== + +Switching modes is done using the video=aty128fb:<resolution>... modedb +boot parameter or using `fbset' program. + +See Documentation/fb/modedb.txt for more information on modedb +resolutions. + +You should compile in both vgacon (to boot if you remove your Rage128 from +box) and aty128fb (for graphics mode). You should not compile-in vesafb +unless you have primary display on non-Rage128 VBE2.0 device (see +Documentation/fb/vesafb.txt for details). + + +X11 +=== + +XF68_FBDev should generally work fine, but it is non-accelerated. As of +this document, 8 and 32bpp works fine. There have been palette issues +when switching from X to console and back to X. You will have to restart +X to fix this. + + +Configuration +============= + +You can pass kernel command line options to vesafb with +`video=aty128fb:option1,option2:value2,option3' (multiple options should +be separated by comma, values are separated from options by `:'). +Accepted options: + +noaccel - do not use acceleration engine. It is default. +accel - use acceleration engine. Not finished. +vmode:x - chooses PowerMacintosh video mode <x>. Deprecated. +cmode:x - chooses PowerMacintosh colour mode <x>. Deprecated. +<XxX@X> - selects startup videomode. See modedb.txt for detailed + explanation. Default is 640x480x8bpp. + + +Limitations +=========== + +There are known and unknown bugs, features and misfeatures. +Currently there are following known bugs: + + This driver is still experimental and is not finished. Too many + bugs/errata to list here. + +-- +Brad Douglas <brad@neruo.com> diff --git a/Documentation/fb/cirrusfb.txt b/Documentation/fb/cirrusfb.txt new file mode 100644 index 0000000..f943684 --- /dev/null +++ b/Documentation/fb/cirrusfb.txt @@ -0,0 +1,97 @@ + + Framebuffer driver for Cirrus Logic chipsets + Copyright 1999 Jeff Garzik <jgarzik@pobox.com> + + + +{ just a little something to get people going; contributors welcome! } + + + +Chip families supported: + SD64 + Piccolo + Picasso + Spectrum + Alpine (GD-543x/4x) + Picasso4 (GD-5446) + GD-5480 + Laguna (GD-546x) + +Bus's supported: + PCI + Zorro + +Architectures supported: + i386 + Alpha + PPC (Motorola Powerstack) + m68k (Amiga) + + + +Default video modes +------------------- +At the moment, there are two kernel command line arguments supported: + +mode:640x480 +mode:800x600 + or +mode:1024x768 + +Full support for startup video modes (modedb) will be integrated soon. + +Version 1.9.9.1 +--------------- +* Fix memory detection for 512kB case +* 800x600 mode +* Fixed timings +* Hint for AXP: Use -accel false -vyres -1 when changing resolution + + +Version 1.9.4.4 +--------------- +* Preliminary Laguna support +* Overhaul color register routines. +* Associated with the above, console colors are now obtained from a LUT + called 'palette' instead of from the VGA registers. This code was + modeled after that in atyfb and matroxfb. +* Code cleanup, add comments. +* Overhaul SR07 handling. +* Bug fixes. + + +Version 1.9.4.3 +--------------- +* Correctly set default startup video mode. +* Do not override ram size setting. Define + CLGEN_USE_HARDCODED_RAM_SETTINGS if you _do_ want to override the RAM + setting. +* Compile fixes related to new 2.3.x IORESOURCE_IO[PORT] symbol changes. +* Use new 2.3.x resource allocation. +* Some code cleanup. + + +Version 1.9.4.2 +--------------- +* Casting fixes. +* Assertions no longer cause an oops on purpose. +* Bug fixes. + + +Version 1.9.4.1 +--------------- +* Add compatibility support. Now requires a 2.1.x, 2.2.x or 2.3.x kernel. + + +Version 1.9.4 +------------- +* Several enhancements, smaller memory footprint, a few bugfixes. +* Requires kernel 2.3.14-pre1 or later. + + +Version 1.9.3 +------------- +* Bundled with kernel 2.3.14-pre1 or later. + + diff --git a/Documentation/fb/cmap_xfbdev.txt b/Documentation/fb/cmap_xfbdev.txt new file mode 100644 index 0000000..55e1f0a --- /dev/null +++ b/Documentation/fb/cmap_xfbdev.txt @@ -0,0 +1,53 @@ +Understanding fbdev's cmap +-------------------------- + +These notes explain how X's dix layer uses fbdev's cmap structures. + +*. example of relevant structures in fbdev as used for a 3-bit grayscale cmap +struct fb_var_screeninfo { + .bits_per_pixel = 8, + .grayscale = 1, + .red = { 4, 3, 0 }, + .green = { 0, 0, 0 }, + .blue = { 0, 0, 0 }, +} +struct fb_fix_screeninfo { + .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, +} +for (i = 0; i < 8; i++) + info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/16; +memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8); +memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8); + +*. X11 apps do something like the following when trying to use grayscale. +for (i=0; i < 8; i++) { + char colorspec[64]; + memset(colorspec,0,64); + sprintf(colorspec, "rgb:%x/%x/%x", i*36,i*36,i*36); + if (!XParseColor(outputDisplay, testColormap, colorspec, &wantedColor)) + printf("Can't get color %s\n",colorspec); + XAllocColor(outputDisplay, testColormap, &wantedColor); + grays[i] = wantedColor; +} +There's also named equivalents like gray1..x provided you have an rgb.txt. + +Somewhere in X's callchain, this results in a call to X code that handles the +colormap. For example, Xfbdev hits the following: + +xc-011010/programs/Xserver/dix/colormap.c: + +FindBestPixel(pentFirst, size, prgb, channel) + +dr = (long) pent->co.local.red - prgb->red; +dg = (long) pent->co.local.green - prgb->green; +db = (long) pent->co.local.blue - prgb->blue; +sq = dr * dr; +UnsignedToBigNum (sq, &sum); +BigNumAdd (&sum, &temp, &sum); + +co.local.red are entries that were brought in through FBIOGETCMAP which come +directly from the info->cmap.red that was listed above. The prgb is the rgb +that the app wants to match to. The above code is doing what looks like a least +squares matching function. That's why the cmap entries can't be set to the left +hand side boundaries of a color range. + diff --git a/Documentation/fb/cyblafb/bugs b/Documentation/fb/cyblafb/bugs new file mode 100644 index 0000000..9443a6d --- /dev/null +++ b/Documentation/fb/cyblafb/bugs @@ -0,0 +1,13 @@ +Bugs +==== + +I currently don't know of any bug. Please do send reports to: + - linux-fbdev-devel@lists.sourceforge.net + - Knut_Petersen@t-online.de. + + +Untested features +================= + +All LCD stuff is untested. If it worked in tridentfb, it should work in +cyblafb. Please test and report the results to Knut_Petersen@t-online.de. diff --git a/Documentation/fb/cyblafb/credits b/Documentation/fb/cyblafb/credits new file mode 100644 index 0000000..0eb3b44 --- /dev/null +++ b/Documentation/fb/cyblafb/credits @@ -0,0 +1,7 @@ +Thanks to +========= + * Alan Hourihane, for writing the X trident driver + * Jani Monoses, for writing the tridentfb driver + * Antonino A. Daplas, for review of the first published + version of cyblafb and some code + * Jochen Hein, for testing and a helpfull bug report diff --git a/Documentation/fb/cyblafb/documentation b/Documentation/fb/cyblafb/documentation new file mode 100644 index 0000000..bb1aac0 --- /dev/null +++ b/Documentation/fb/cyblafb/documentation @@ -0,0 +1,17 @@ +Available Documentation +======================= + +Apollo PLE 133 Chipset VT8601A North Bridge Datasheet, Rev. 1.82, October 22, +2001, available from VIA: + + http://www.viavpsd.com/product/6/15/DS8601A182.pdf + +The datasheet is incomplete, some registers that need to be programmed are not +explained at all and important bits are listed as "reserved". But you really +need the datasheet to understand the code. "p. xxx" comments refer to page +numbers of this document. + +XFree/XOrg drivers are available and of good quality, looking at the code +there is a good idea if the datasheet does not provide enough information +or if the datasheet seems to be wrong. + diff --git a/Documentation/fb/cyblafb/fb.modes b/Documentation/fb/cyblafb/fb.modes new file mode 100644 index 0000000..fe0e522 --- /dev/null +++ b/Documentation/fb/cyblafb/fb.modes @@ -0,0 +1,154 @@ +# +# Sample fb.modes file +# +# Provides an incomplete list of working modes for +# the cyberblade/i1 graphics core. +# +# The value 4294967256 is used instead of -40. Of course, -40 is not +# a really reasonable value, but chip design does not always follow +# logic. Believe me, it's ok, and it's the way the BIOS does it. +# +# fbset requires 4294967256 in fb.modes and -40 as an argument to +# the -t parameter. That's also not too reasonable, and it might change +# in the future or might even be differt for your current version. +# + +mode "640x480-50" + geometry 640 480 2048 4096 8 + timings 47619 4294967256 24 17 0 216 3 +endmode + +mode "640x480-60" + geometry 640 480 2048 4096 8 + timings 39682 4294967256 24 17 0 216 3 +endmode + +mode "640x480-70" + geometry 640 480 2048 4096 8 + timings 34013 4294967256 24 17 0 216 3 +endmode + +mode "640x480-72" + geometry 640 480 2048 4096 8 + timings 33068 4294967256 24 17 0 216 3 +endmode + +mode "640x480-75" + geometry 640 480 2048 4096 8 + timings 31746 4294967256 24 17 0 216 3 +endmode + +mode "640x480-80" + geometry 640 480 2048 4096 8 + timings 29761 4294967256 24 17 0 216 3 +endmode + +mode "640x480-85" + geometry 640 480 2048 4096 8 + timings 28011 4294967256 24 17 0 216 3 +endmode + +mode "800x600-50" + geometry 800 600 2048 4096 8 + timings 30303 96 24 14 0 136 11 +endmode + +mode "800x600-60" + geometry 800 600 2048 4096 8 + timings 25252 96 24 14 0 136 11 +endmode + +mode "800x600-70" + geometry 800 600 2048 4096 8 + timings 21645 96 24 14 0 136 11 +endmode + +mode "800x600-72" + geometry 800 600 2048 4096 8 + timings 21043 96 24 14 0 136 11 +endmode + +mode "800x600-75" + geometry 800 600 2048 4096 8 + timings 20202 96 24 14 0 136 11 +endmode + +mode "800x600-80" + geometry 800 600 2048 4096 8 + timings 18939 96 24 14 0 136 11 +endmode + +mode "800x600-85" + geometry 800 600 2048 4096 8 + timings 17825 96 24 14 0 136 11 +endmode + +mode "1024x768-50" + geometry 1024 768 2048 4096 8 + timings 19054 144 24 29 0 120 3 +endmode + +mode "1024x768-60" + geometry 1024 768 2048 4096 8 + timings 15880 144 24 29 0 120 3 +endmode + +mode "1024x768-70" + geometry 1024 768 2048 4096 8 + timings 13610 144 24 29 0 120 3 +endmode + +mode "1024x768-72" + geometry 1024 768 2048 4096 8 + timings 13232 144 24 29 0 120 3 +endmode + +mode "1024x768-75" + geometry 1024 768 2048 4096 8 + timings 12703 144 24 29 0 120 3 +endmode + +mode "1024x768-80" + geometry 1024 768 2048 4096 8 + timings 11910 144 24 29 0 120 3 +endmode + +mode "1024x768-85" + geometry 1024 768 2048 4096 8 + timings 11209 144 24 29 0 120 3 +endmode + +mode "1280x1024-50" + geometry 1280 1024 2048 4096 8 + timings 11114 232 16 39 0 160 3 +endmode + +mode "1280x1024-60" + geometry 1280 1024 2048 4096 8 + timings 9262 232 16 39 0 160 3 +endmode + +mode "1280x1024-70" + geometry 1280 1024 2048 4096 8 + timings 7939 232 16 39 0 160 3 +endmode + +mode "1280x1024-72" + geometry 1280 1024 2048 4096 8 + timings 7719 232 16 39 0 160 3 +endmode + +mode "1280x1024-75" + geometry 1280 1024 2048 4096 8 + timings 7410 232 16 39 0 160 3 +endmode + +mode "1280x1024-80" + geometry 1280 1024 2048 4096 8 + timings 6946 232 16 39 0 160 3 +endmode + +mode "1280x1024-85" + geometry 1280 1024 2048 4096 8 + timings 6538 232 16 39 0 160 3 +endmode diff --git a/Documentation/fb/cyblafb/performance b/Documentation/fb/cyblafb/performance new file mode 100644 index 0000000..8d15d5d --- /dev/null +++ b/Documentation/fb/cyblafb/performance @@ -0,0 +1,79 @@ +Speed +===== + +CyBlaFB is much faster than tridentfb and vesafb. Compare the performance data +for mode 1280x1024-[8,16,32]@61 Hz. + +Test 1: Cat a file with 2000 lines of 0 characters. +Test 2: Cat a file with 2000 lines of 80 characters. +Test 3: Cat a file with 2000 lines of 160 characters. + +All values show system time use in seconds, kernel 2.6.12 was used for +the measurements. 2.6.13 is a bit slower, 2.6.14 hopefully will include a +patch that speeds up kernel bitblitting a lot ( > 20%). + ++-----------+-----------------------------------------------------+ +| | not accelerated | +| TRIDENTFB +-----------------+-----------------+-----------------+ +| of 2.6.12 | 8 bpp | 16 bpp | 32 bpp | +| | noypan | ypan | noypan | ypan | noypan | ypan | ++-----------+--------+--------+--------+--------+--------+--------+ +| Test 1 | 4.31 | 4.33 | 6.05 | 12.81 | ---- | ---- | +| Test 2 | 67.94 | 5.44 | 123.16 | 14.79 | ---- | ---- | +| Test 3 | 131.36 | 6.55 | 240.12 | 16.76 | ---- | ---- | ++-----------+--------+--------+--------+--------+--------+--------+ +| Comments | | | completely bro- | +| | | | ken, monitor | +| | | | switches off | ++-----------+-----------------+-----------------+-----------------+ + + ++-----------+-----------------------------------------------------+ +| | accelerated | +| TRIDENTFB +-----------------+-----------------+-----------------+ +| of 2.6.12 | 8 bpp | 16 bpp | 32 bpp | +| | noypan | ypan | noypan | ypan | noypan | ypan | ++-----------+--------+--------+--------+--------+--------+--------+ +| Test 1 | ---- | ---- | 20.62 | 1.22 | ---- | ---- | +| Test 2 | ---- | ---- | 22.61 | 3.19 | ---- | ---- | +| Test 3 | ---- | ---- | 24.59 | 5.16 | ---- | ---- | ++-----------+--------+--------+--------+--------+--------+--------+ +| Comments | broken, writing | broken, ok only | completely bro- | +| | to wrong places | if bgcolor is | ken, monitor | +| | on screen + bug | black, bug in | switches off | +| | in fillrect() | fillrect() | | ++-----------+-----------------+-----------------+-----------------+ + + ++-----------+-----------------------------------------------------+ +| | not accelerated | +| VESAFB +-----------------+-----------------+-----------------+ +| of 2.6.12 | 8 bpp | 16 bpp | 32 bpp | +| | noypan | ypan | noypan | ypan | noypan | ypan | ++-----------+--------+--------+--------+--------+--------+--------+ +| Test 1 | 4.26 | 3.76 | 5.99 | 7.23 | ---- | ---- | +| Test 2 | 65.65 | 4.89 | 120.88 | 9.08 | ---- | ---- | +| Test 3 | 126.91 | 5.94 | 235.77 | 11.03 | ---- | ---- | ++-----------+--------+--------+--------+--------+--------+--------+ +| Comments | vga=0x307 | vga=0x31a | vga=0x31b not | +| | fh=80kHz | fh=80kHz | supported by | +| | fv=75kHz | fv=75kHz | video BIOS and | +| | | | hardware | ++-----------+-----------------+-----------------+-----------------+ + + ++-----------+-----------------------------------------------------+ +| | accelerated | +| CYBLAFB +-----------------+-----------------+-----------------+ +| | 8 bpp | 16 bpp | 32 bpp | +| | noypan | ypan | noypan | ypan | noypan | ypan | ++-----------+--------+--------+--------+--------+--------+--------+ +| Test 1 | 8.02 | 0.23 | 19.04 | 0.61 | 57.12 | 2.74 | +| Test 2 | 8.38 | 0.55 | 19.39 | 0.92 | 57.54 | 3.13 | +| Test 3 | 8.73 | 0.86 | 19.74 | 1.24 | 57.95 | 3.51 | ++-----------+--------+--------+--------+--------+--------+--------+ +| Comments | | | | +| | | | | +| | | | | +| | | | | ++-----------+-----------------+-----------------+-----------------+ diff --git a/Documentation/fb/cyblafb/todo b/Documentation/fb/cyblafb/todo new file mode 100644 index 0000000..c5f6d0e --- /dev/null +++ b/Documentation/fb/cyblafb/todo @@ -0,0 +1,31 @@ +TODO / Missing features +======================= + +Verify LCD stuff "stretch" and "center" options are + completely untested ... this code needs to be + verified. As I don't have access to such + hardware, please contact me if you are + willing run some tests. + +Interlaced video modes The reason that interleaved + modes are disabled is that I do not know + the meaning of the vertical interlace + parameter. Also the datasheet mentions a + bit d8 of a horizontal interlace parameter, + but nowhere the lower 8 bits. Please help + if you can. + +low-res double scan modes Who needs it? + +accelerated color blitting Who needs it? The console driver does use color + blitting for nothing but drawing the penguine, + everything else is done using color expanding + blitting of 1bpp character bitmaps. + +ioctls Who needs it? + +TV-out Will be done later. Use "vga= " at boot time + to set a suitable video mode. + +??? Feel free to contact me if you have any + feature requests diff --git a/Documentation/fb/cyblafb/usage b/Documentation/fb/cyblafb/usage new file mode 100644 index 0000000..a39bb3d --- /dev/null +++ b/Documentation/fb/cyblafb/usage @@ -0,0 +1,217 @@ +CyBlaFB is a framebuffer driver for the Cyberblade/i1 graphics core integrated +into the VIA Apollo PLE133 (aka vt8601) south bridge. It is developed and +tested using a VIA EPIA 5000 board. + +Cyblafb - compiled into the kernel or as a module? +================================================== + +You might compile cyblafb either as a module or compile it permanently into the +kernel. + +Unless you have a real reason to do so you should not compile both vesafb and +cyblafb permanently into the kernel. It's possible and it helps during the +developement cycle, but it's useless and will at least block some otherwise +usefull memory for ordinary users. + +Selecting Modes +=============== + + Startup Mode + ============ + + First of all, you might use the "vga=???" boot parameter as it is + documented in vesafb.txt and svga.txt. Cyblafb will detect the video + mode selected and will use the geometry and timings found by + inspecting the hardware registers. + + video=cyblafb vga=0x317 + + Alternatively you might use a combination of the mode, ref and bpp + parameters. If you compiled the driver into the kernel, add something + like this to the kernel command line: + + video=cyblafb:1280x1024,bpp=16,ref=50 ... + + If you compiled the driver as a module, the same mode would be + selected by the following command: + + modprobe cyblafb mode=1280x1024 bpp=16 ref=50 ... + + None of the modes possible to select as startup modes are affected by + the problems described at the end of the next subsection. + + For all startup modes cyblafb chooses a virtual x resolution of 2048, + the only exception is mode 1280x1024 in combination with 32 bpp. This + allows ywrap scrolling for all those modes if rotation is 0 or 2, and + also fast scrolling if rotation is 1 or 3. The default virtual y reso- + lution is 4096 for bpp == 8, 2048 for bpp==16 and 1024 for bpp == 32, + again with the only exception of 1280x1024 at 32 bpp. + + Please do set your video memory size to 8 Mb in the Bios setup. Other + values will work, but performace is decreased for a lot of modes. + + Mode changes using fbset + ======================== + + You might use fbset to change the video mode, see "man fbset". Cyblafb + generally does assume that you know what you are doing. But it does + some checks, especially those that are needed to prevent you from + damaging your hardware. + + - only 8, 16, 24 and 32 bpp video modes are accepted + - interlaced video modes are not accepted + - double scan video modes are not accepted + - if a flat panel is found, cyblafb does not allow you + to program a resolution higher than the physical + resolution of the flat panel monitor + - cyblafb does not allow vclk to exceed 230 MHz. As 32 bpp + and (currently) 24 bit modes use a doubled vclk internally, + the dotclock limit as seen by fbset is 115 MHz for those + modes and 230 MHz for 8 and 16 bpp modes. + - cyblafb will allow you to select very high resolutions as + long as the hardware can be programmed to these modes. The + documented limit 1600x1200 is not enforced, but don't expect + perfect signal quality. + + Any request that violates the rules given above will be either changed + to something the hardware supports or an error value will be returned. + + If you program a virtual y resolution higher than the hardware limit, + cyblafb will silently decrease that value to the highest possible + value. The same is true for a virtual x resolution that is not + supported by the hardware. Cyblafb tries to adapt vyres first because + vxres decides if ywrap scrolling is possible or not. + + Attempts to disable acceleration are ignored, I believe that this is + safe. + + Some video modes that should work do not work as expected. If you use + the standard fb.modes, fbset 640x480-60 will program that mode, but + you will see a vertical area, about two characters wide, with only + much darker characters than the other characters on the screen. + Cyblafb does allow that mode to be set, as it does not violate the + official specifications. It would need a lot of code to reliably sort + out all invalid modes, playing around with the margin values will + give a valid mode quickly. And if cyblafb would detect such an invalid + mode, should it silently alter the requested values or should it + report an error? Both options have some pros and cons. As stated + above, none of the startup modes are affected, and if you set + verbosity to 1 or higher, cyblafb will print the fbset command that + would be needed to program that mode using fbset. + + +Other Parameters +================ + + +crt don't autodetect, assume monitor connected to + standard VGA connector + +fp don't autodetect, assume flat panel display + connected to flat panel monitor interface + +nativex inform driver about native x resolution of + flat panel monitor connected to special + interface (should be autodetected) + +stretch stretch image to adapt low resolution modes to + higer resolutions of flat panel monitors + connected to special interface + +center center image to adapt low resolution modes to + higer resolutions of flat panel monitors + connected to special interface + +memsize use if autodetected memsize is wrong ... + should never be necessary + +nopcirr disable PCI read retry +nopciwr disable PCI write retry +nopcirb disable PCI read bursts +nopciwb disable PCI write bursts + +bpp bpp for specified modes + valid values: 8 || 16 || 24 || 32 + +ref refresh rate for specified mode + valid values: 50 <= ref <= 85 + +mode 640x480 or 800x600 or 1024x768 or 1280x1024 + if not specified, the startup mode will be detected + and used, so you might also use the vga=??? parameter + described in vesafb.txt. If you do not specify a mode, + bpp and ref parameters are ignored. + +verbosity 0 is the default, increase to at least 2 for every + bug report! + +Development hints +================= + +It's much faster do compile a module and to load the new version after +unloading the old module than to compile a new kernel and to reboot. So if you +try to work on cyblafb, it might be a good idea to use cyblafb as a module. +In real life, fast often means dangerous, and that's also the case here. If +you introduce a serious bug when cyblafb is compiled into the kernel, the +kernel will lock or oops with a high probability before the file system is +mounted, and the danger for your data is low. If you load a broken own version +of cyblafb on a running system, the danger for the integrity of the file +system is much higher as you might need a hard reset afterwards. Decide +yourself. + +Module unloading, the vfb method +================================ + +If you want to unload/reload cyblafb using the virtual framebuffer, you need +to enable vfb support in the kernel first. After that, load the modules as +shown below: + + modprobe vfb vfb_enable=1 + modprobe fbcon + modprobe cyblafb + fbset -fb /dev/fb1 1280x1024-60 -vyres 2662 + con2fb /dev/fb1 /dev/tty1 + ... + +If you now made some changes to cyblafb and want to reload it, you might do it +as show below: + + con2fb /dev/fb0 /dev/tty1 + ... + rmmod cyblafb + modprobe cyblafb + con2fb /dev/fb1 /dev/tty1 + ... + +Of course, you might choose another mode, and most certainly you also want to +map some other /dev/tty* to the real framebuffer device. You might also choose +to compile fbcon as a kernel module or place it permanently in the kernel. + +I do not know of any way to unload fbcon, and fbcon will prevent the +framebuffer device loaded first from unloading. [If there is a way, then +please add a description here!] + +Module unloading, the vesafb method +=================================== + +Configure the kernel: + + <*> Support for frame buffer devices + [*] VESA VGA graphics support + <M> Cyberblade/i1 support + +Add e.g. "video=vesafb:ypan vga=0x307" to the kernel parameters. The ypan +parameter is important, choose any vga parameter you like as long as it is +a graphics mode. + +After booting, load cyblafb without any mode and bpp parameter and assign +cyblafb to individual ttys using con2fb, e.g.: + + modprobe cyblafb + con2fb /dev/fb1 /dev/tty1 + +Unloading cyblafb works without problems after you assign vesafb to all +ttys again, e.g.: + + con2fb /dev/fb0 /dev/tty1 + rmmod cyblafb diff --git a/Documentation/fb/cyblafb/whatsnew b/Documentation/fb/cyblafb/whatsnew new file mode 100644 index 0000000..76c07a2 --- /dev/null +++ b/Documentation/fb/cyblafb/whatsnew @@ -0,0 +1,29 @@ +0.62 +==== + + - the vesafb parameter has been removed as I decided to allow the + feature without any special parameter. + + - Cyblafb does not use the vga style of panning any longer, now the + "right view" register in the graphics engine IO space is used. Without + that change it was impossible to use all available memory, and without + access to all available memory it is impossible to ywrap. + + - The imageblit function now uses hardware acceleration for all font + widths. Hardware blitting across pixel column 2048 is broken in the + cyberblade/i1 graphics core, but we work around that hardware bug. + + - modes with vxres != xres are supported now. + + - ywrap scrolling is supported now and the default. This is a big + performance gain. + + - default video modes use vyres > yres and vxres > xres to allow + almost optimal scrolling speed for normal and rotated screens + + - some features mainly usefull for debugging the upper layers of the + framebuffer system have been added, have a look at the code + + - fixed: Oops after unloading cyblafb when reading /proc/io* + + - we work around some bugs of the higher framebuffer layers. diff --git a/Documentation/fb/cyblafb/whycyblafb b/Documentation/fb/cyblafb/whycyblafb new file mode 100644 index 0000000..a123bc1 --- /dev/null +++ b/Documentation/fb/cyblafb/whycyblafb @@ -0,0 +1,85 @@ +I tried the following framebuffer drivers: + + - TRIDENTFB is full of bugs. Acceleration is broken for Blade3D + graphics cores like the cyberblade/i1. It claims to support a great + number of devices, but documentation for most of these devices is + unfortunately not available. There is _no_ reason to use tridentfb + for cyberblade/i1 + CRT users. VESAFB is faster, and the one + advantage, mode switching, is broken in tridentfb. + + - VESAFB is used by many distributions as a standard. Vesafb does + not support mode switching. VESAFB is a bit faster than the working + configurations of TRIDENTFB, but it is still too slow, even if you + use ypan. + + - EPIAFB (you'll find it on sourceforge) supports the Cyberblade/i1 + graphics core, but it still has serious bugs and developement seems + to have stopped. This is the one driver with TV-out support. If you + do need this feature, try epiafb. + +None of these drivers was a real option for me. + +I believe that is unreasonable to change code that announces to support 20 +devices if I only have more or less sufficient documentation for exactly one +of these. The risk of breaking device foo while fixing device bar is too high. + +So I decided to start CyBlaFB as a stripped down tridentfb. + +All code specific to other Trident chips has been removed. After that there +were a lot of cosmetic changes to increase the readability of the code. All +register names were changed to those mnemonics used in the datasheet. Function +and macro names were changed if they hindered easy understanding of the code. + +After that I debugged the code and implemented some new features. I'll try to +give a little summary of the main changes: + + - calculation of vertical and horizontal timings was fixed + + - video signal quality has been improved dramatically + + - acceleration: + + - fillrect and copyarea were fixed and reenabled + + - color expanding imageblit was newly implemented, color + imageblit (only used to draw the penguine) still uses the + generic code. + + - init of the acceleration engine was improved and moved to a + place where it really works ... + + - sync function has a timeout now and tries to reset and + reinit the accel engine if necessary + + - fewer slow copyarea calls when doing ypan scrolling by using + undocumented bit d21 of screen start address stored in + CR2B[5]. BIOS does use it also, so this should be safe. + + - cyblafb rejects any attempt to set modes that would cause vclk + values above reasonable 230 MHz. 32bit modes use a clock + multiplicator of 2, so fbset does show the correct values for + pixclock but not for vclk in this case. The fbset limit is 115 MHz + for 32 bpp modes. + + - cyblafb rejects modes known to be broken or unimplemented (all + interlaced modes, all doublescan modes for now) + + - cyblafb now works independant of the video mode in effect at startup + time (tridentfb does not init all needed registers to reasonable + values) + + - switching between video modes does work reliably now + + - the first video mode now is the one selected on startup using the + vga=???? mechanism or any of + - 640x480, 800x600, 1024x768, 1280x1024 + - 8, 16, 24 or 32 bpp + - refresh between 50 Hz and 85 Hz, 1 Hz steps (1280x1024-32 + is limited to 63Hz) + + - pci retry and pci burst mode are settable (try to disable if you + experience latency problems) + + - built as a module cyblafb might be unloaded and reloaded using + the vfb module and con2vt or might be used together with vesafb + diff --git a/Documentation/fb/deferred_io.txt b/Documentation/fb/deferred_io.txt new file mode 100644 index 0000000..7483283 --- /dev/null +++ b/Documentation/fb/deferred_io.txt @@ -0,0 +1,75 @@ +Deferred IO +----------- + +Deferred IO is a way to delay and repurpose IO. It uses host memory as a +buffer and the MMU pagefault as a pretrigger for when to perform the device +IO. The following example may be a useful explanation of how one such setup +works: + +- userspace app like Xfbdev mmaps framebuffer +- deferred IO and driver sets up fault and page_mkwrite handlers +- userspace app tries to write to mmaped vaddress +- we get pagefault and reach fault handler +- fault handler finds and returns physical page +- we get page_mkwrite where we add this page to a list +- schedule a workqueue task to be run after a delay +- app continues writing to that page with no additional cost. this is + the key benefit. +- the workqueue task comes in and mkcleans the pages on the list, then + completes the work associated with updating the framebuffer. this is + the real work talking to the device. +- app tries to write to the address (that has now been mkcleaned) +- get pagefault and the above sequence occurs again + +As can be seen from above, one benefit is roughly to allow bursty framebuffer +writes to occur at minimum cost. Then after some time when hopefully things +have gone quiet, we go and really update the framebuffer which would be +a relatively more expensive operation. + +For some types of nonvolatile high latency displays, the desired image is +the final image rather than the intermediate stages which is why it's okay +to not update for each write that is occurring. + +It may be the case that this is useful in other scenarios as well. Paul Mundt +has mentioned a case where it is beneficial to use the page count to decide +whether to coalesce and issue SG DMA or to do memory bursts. + +Another one may be if one has a device framebuffer that is in an usual format, +say diagonally shifting RGB, this may then be a mechanism for you to allow +apps to pretend to have a normal framebuffer but reswizzle for the device +framebuffer at vsync time based on the touched pagelist. + +How to use it: (for applications) +--------------------------------- +No changes needed. mmap the framebuffer like normal and just use it. + +How to use it: (for fbdev drivers) +---------------------------------- +The following example may be helpful. + +1. Setup your structure. Eg: + +static struct fb_deferred_io hecubafb_defio = { + .delay = HZ, + .deferred_io = hecubafb_dpy_deferred_io, +}; + +The delay is the minimum delay between when the page_mkwrite trigger occurs +and when the deferred_io callback is called. The deferred_io callback is +explained below. + +2. Setup your deferred IO callback. Eg: +static void hecubafb_dpy_deferred_io(struct fb_info *info, + struct list_head *pagelist) + +The deferred_io callback is where you would perform all your IO to the display +device. You receive the pagelist which is the list of pages that were written +to during the delay. You must not modify this list. This callback is called +from a workqueue. + +3. Call init + info->fbdefio = &hecubafb_defio; + fb_deferred_io_init(info); + +4. Call cleanup + fb_deferred_io_cleanup(info); diff --git a/Documentation/fb/fbcon.txt b/Documentation/fb/fbcon.txt new file mode 100644 index 0000000..99ea58e --- /dev/null +++ b/Documentation/fb/fbcon.txt @@ -0,0 +1,324 @@ +The Framebuffer Console +======================= + + The framebuffer console (fbcon), as its name implies, is a text +console running on top of the framebuffer device. It has the functionality of +any standard text console driver, such as the VGA console, with the added +features that can be attributed to the graphical nature of the framebuffer. + + In the x86 architecture, the framebuffer console is optional, and +some even treat it as a toy. For other architectures, it is the only available +display device, text or graphical. + + What are the features of fbcon? The framebuffer console supports +high resolutions, varying font types, display rotation, primitive multihead, +etc. Theoretically, multi-colored fonts, blending, aliasing, and any feature +made available by the underlying graphics card are also possible. + +A. Configuration + + The framebuffer console can be enabled by using your favorite kernel +configuration tool. It is under Device Drivers->Graphics Support->Support for +framebuffer devices->Framebuffer Console Support. Select 'y' to compile +support statically, or 'm' for module support. The module will be fbcon. + + In order for fbcon to activate, at least one framebuffer driver is +required, so choose from any of the numerous drivers available. For x86 +systems, they almost universally have VGA cards, so vga16fb and vesafb will +always be available. However, using a chipset-specific driver will give you +more speed and features, such as the ability to change the video mode +dynamically. + + To display the penguin logo, choose any logo available in Logo +Configuration->Boot up logo. + + Also, you will need to select at least one compiled-in fonts, but if +you don't do anything, the kernel configuration tool will select one for you, +usually an 8x16 font. + +GOTCHA: A common bug report is enabling the framebuffer without enabling the +framebuffer console. Depending on the driver, you may get a blanked or +garbled display, but the system still boots to completion. If you are +fortunate to have a driver that does not alter the graphics chip, then you +will still get a VGA console. + +B. Loading + +Possible scenarios: + +1. Driver and fbcon are compiled statically + + Usually, fbcon will automatically take over your console. The notable + exception is vesafb. It needs to be explicitly activated with the + vga= boot option parameter. + +2. Driver is compiled statically, fbcon is compiled as a module + + Depending on the driver, you either get a standard console, or a + garbled display, as mentioned above. To get a framebuffer console, + do a 'modprobe fbcon'. + +3. Driver is compiled as a module, fbcon is compiled statically + + You get your standard console. Once the driver is loaded with + 'modprobe xxxfb', fbcon automatically takes over the console with + the possible exception of using the fbcon=map:n option. See below. + +4. Driver and fbcon are compiled as a module. + + You can load them in any order. Once both are loaded, fbcon will take + over the console. + +C. Boot options + + The framebuffer console has several, largely unknown, boot options + that can change its behavior. + +1. fbcon=font:<name> + + Select the initial font to use. The value 'name' can be any of the + compiled-in fonts: VGA8x16, 7x14, 10x18, VGA8x8, MINI4x6, RomanLarge, + SUN8x16, SUN12x22, ProFont6x11, Acorn8x8, PEARL8x8. + + Note, not all drivers can handle font with widths not divisible by 8, + such as vga16fb. + +2. fbcon=scrollback:<value>[k] + + The scrollback buffer is memory that is used to preserve display + contents that has already scrolled past your view. This is accessed + by using the Shift-PageUp key combination. The value 'value' is any + integer. It defaults to 32KB. The 'k' suffix is optional, and will + multiply the 'value' by 1024. + +3. fbcon=map:<0123> + + This is an interesting option. It tells which driver gets mapped to + which console. The value '0123' is a sequence that gets repeated until + the total length is 64 which is the number of consoles available. In + the above example, it is expanded to 012301230123... and the mapping + will be: + + tty | 1 2 3 4 5 6 7 8 9 ... + fb | 0 1 2 3 0 1 2 3 0 ... + + ('cat /proc/fb' should tell you what the fb numbers are) + + One side effect that may be useful is using a map value that exceeds + the number of loaded fb drivers. For example, if only one driver is + available, fb0, adding fbcon=map:1 tells fbcon not to take over the + console. + + Later on, when you want to map the console the to the framebuffer + device, you can use the con2fbmap utility. + +4. fbcon=vc:<n1>-<n2> + + This option tells fbcon to take over only a range of consoles as + specified by the values 'n1' and 'n2'. The rest of the consoles + outside the given range will still be controlled by the standard + console driver. + + NOTE: For x86 machines, the standard console is the VGA console which + is typically located on the same video card. Thus, the consoles that + are controlled by the VGA console will be garbled. + +4. fbcon=rotate:<n> + + This option changes the orientation angle of the console display. The + value 'n' accepts the following: + + 0 - normal orientation (0 degree) + 1 - clockwise orientation (90 degrees) + 2 - upside down orientation (180 degrees) + 3 - counterclockwise orientation (270 degrees) + + The angle can be changed anytime afterwards by 'echoing' the same + numbers to any one of the 2 attributes found in + /sys/class/graphics/fbcon + + rotate - rotate the display of the active console + rotate_all - rotate the display of all consoles + + Console rotation will only become available if Console Rotation + Support is compiled in your kernel. + + NOTE: This is purely console rotation. Any other applications that + use the framebuffer will remain at their 'normal'orientation. + Actually, the underlying fb driver is totally ignorant of console + rotation. + +C. Attaching, Detaching and Unloading + +Before going on on how to attach, detach and unload the framebuffer console, an +illustration of the dependencies may help. + +The console layer, as with most subsystems, needs a driver that interfaces with +the hardware. Thus, in a VGA console: + +console ---> VGA driver ---> hardware. + +Assuming the VGA driver can be unloaded, one must first unbind the VGA driver +from the console layer before unloading the driver. The VGA driver cannot be +unloaded if it is still bound to the console layer. (See +Documentation/console/console.txt for more information). + +This is more complicated in the case of the framebuffer console (fbcon), +because fbcon is an intermediate layer between the console and the drivers: + +console ---> fbcon ---> fbdev drivers ---> hardware + +The fbdev drivers cannot be unloaded if it's bound to fbcon, and fbcon cannot +be unloaded if it's bound to the console layer. + +So to unload the fbdev drivers, one must first unbind fbcon from the console, +then unbind the fbdev drivers from fbcon. Fortunately, unbinding fbcon from +the console layer will automatically unbind framebuffer drivers from +fbcon. Thus, there is no need to explicitly unbind the fbdev drivers from +fbcon. + +So, how do we unbind fbcon from the console? Part of the answer is in +Documentation/console/console.txt. To summarize: + +Echo a value to the bind file that represents the framebuffer console +driver. So assuming vtcon1 represents fbcon, then: + +echo 1 > sys/class/vtconsole/vtcon1/bind - attach framebuffer console to + console layer +echo 0 > sys/class/vtconsole/vtcon1/bind - detach framebuffer console from + console layer + +If fbcon is detached from the console layer, your boot console driver (which is +usually VGA text mode) will take over. A few drivers (rivafb and i810fb) will +restore VGA text mode for you. With the rest, before detaching fbcon, you +must take a few additional steps to make sure that your VGA text mode is +restored properly. The following is one of the several methods that you can do: + +1. Download or install vbetool. This utility is included with most + distributions nowadays, and is usually part of the suspend/resume tool. + +2. In your kernel configuration, ensure that CONFIG_FRAMEBUFFER_CONSOLE is set + to 'y' or 'm'. Enable one or more of your favorite framebuffer drivers. + +3. Boot into text mode and as root run: + + vbetool vbestate save > <vga state file> + + The above command saves the register contents of your graphics + hardware to <vga state file>. You need to do this step only once as + the state file can be reused. + +4. If fbcon is compiled as a module, load fbcon by doing: + + modprobe fbcon + +5. Now to detach fbcon: + + vbetool vbestate restore < <vga state file> && \ + echo 0 > /sys/class/vtconsole/vtcon1/bind + +6. That's it, you're back to VGA mode. And if you compiled fbcon as a module, + you can unload it by 'rmmod fbcon' + +7. To reattach fbcon: + + echo 1 > /sys/class/vtconsole/vtcon1/bind + +8. Once fbcon is unbound, all drivers registered to the system will also +become unbound. This means that fbcon and individual framebuffer drivers +can be unloaded or reloaded at will. Reloading the drivers or fbcon will +automatically bind the console, fbcon and the drivers together. Unloading +all the drivers without unloading fbcon will make it impossible for the +console to bind fbcon. + +Notes for vesafb users: +======================= + +Unfortunately, if your bootline includes a vga=xxx parameter that sets the +hardware in graphics mode, such as when loading vesafb, vgacon will not load. +Instead, vgacon will replace the default boot console with dummycon, and you +won't get any display after detaching fbcon. Your machine is still alive, so +you can reattach vesafb. However, to reattach vesafb, you need to do one of +the following: + +Variation 1: + + a. Before detaching fbcon, do + + vbetool vbemode save > <vesa state file> # do once for each vesafb mode, + # the file can be reused + + b. Detach fbcon as in step 5. + + c. Attach fbcon + + vbetool vbestate restore < <vesa state file> && \ + echo 1 > /sys/class/vtconsole/vtcon1/bind + +Variation 2: + + a. Before detaching fbcon, do: + echo <ID> > /sys/class/tty/console/bind + + + vbetool vbemode get + + b. Take note of the mode number + + b. Detach fbcon as in step 5. + + c. Attach fbcon: + + vbetool vbemode set <mode number> && \ + echo 1 > /sys/class/vtconsole/vtcon1/bind + +Samples: +======== + +Here are 2 sample bash scripts that you can use to bind or unbind the +framebuffer console driver if you are in an X86 box: + +--------------------------------------------------------------------------- +#!/bin/bash +# Unbind fbcon + +# Change this to where your actual vgastate file is located +# Or Use VGASTATE=$1 to indicate the state file at runtime +VGASTATE=/tmp/vgastate + +# path to vbetool +VBETOOL=/usr/local/bin + + +for (( i = 0; i < 16; i++)) +do + if test -x /sys/class/vtconsole/vtcon$i; then + if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \ + = 1 ]; then + if test -x $VBETOOL/vbetool; then + echo Unbinding vtcon$i + $VBETOOL/vbetool vbestate restore < $VGASTATE + echo 0 > /sys/class/vtconsole/vtcon$i/bind + fi + fi + fi +done + +--------------------------------------------------------------------------- +#!/bin/bash +# Bind fbcon + +for (( i = 0; i < 16; i++)) +do + if test -x /sys/class/vtconsole/vtcon$i; then + if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \ + = 1 ]; then + echo Unbinding vtcon$i + echo 1 > /sys/class/vtconsole/vtcon$i/bind + fi + fi +done +--------------------------------------------------------------------------- + +-- +Antonino Daplas <adaplas@pol.net> diff --git a/Documentation/fb/framebuffer.txt b/Documentation/fb/framebuffer.txt new file mode 100644 index 0000000..b3e3a03 --- /dev/null +++ b/Documentation/fb/framebuffer.txt @@ -0,0 +1,345 @@ + The Frame Buffer Device + ----------------------- + +Maintained by Geert Uytterhoeven <geert@linux-m68k.org> +Last revised: May 10, 2001 + + +0. Introduction +--------------- + +The frame buffer device provides an abstraction for the graphics hardware. It +represents the frame buffer of some video hardware and allows application +software to access the graphics hardware through a well-defined interface, so +the software doesn't need to know anything about the low-level (hardware +register) stuff. + +The device is accessed through special device nodes, usually located in the +/dev directory, i.e. /dev/fb*. + + +1. User's View of /dev/fb* +-------------------------- + +From the user's point of view, the frame buffer device looks just like any +other device in /dev. It's a character device using major 29; the minor +specifies the frame buffer number. + +By convention, the following device nodes are used (numbers indicate the device +minor numbers): + + 0 = /dev/fb0 First frame buffer + 1 = /dev/fb1 Second frame buffer + ... + 31 = /dev/fb31 32nd frame buffer + +For backwards compatibility, you may want to create the following symbolic +links: + + /dev/fb0current -> fb0 + /dev/fb1current -> fb1 + +and so on... + +The frame buffer devices are also `normal' memory devices, this means, you can +read and write their contents. You can, for example, make a screen snapshot by + + cp /dev/fb0 myfile + +There also can be more than one frame buffer at a time, e.g. if you have a +graphics card in addition to the built-in hardware. The corresponding frame +buffer devices (/dev/fb0 and /dev/fb1 etc.) work independently. + +Application software that uses the frame buffer device (e.g. the X server) will +use /dev/fb0 by default (older software uses /dev/fb0current). You can specify +an alternative frame buffer device by setting the environment variable +$FRAMEBUFFER to the path name of a frame buffer device, e.g. (for sh/bash +users): + + export FRAMEBUFFER=/dev/fb1 + +or (for csh users): + + setenv FRAMEBUFFER /dev/fb1 + +After this the X server will use the second frame buffer. + + +2. Programmer's View of /dev/fb* +-------------------------------- + +As you already know, a frame buffer device is a memory device like /dev/mem and +it has the same features. You can read it, write it, seek to some location in +it and mmap() it (the main usage). The difference is just that the memory that +appears in the special file is not the whole memory, but the frame buffer of +some video hardware. + +/dev/fb* also allows several ioctls on it, by which lots of information about +the hardware can be queried and set. The color map handling works via ioctls, +too. Look into <linux/fb.h> for more information on what ioctls exist and on +which data structures they work. Here's just a brief overview: + + - You can request unchangeable information about the hardware, like name, + organization of the screen memory (planes, packed pixels, ...) and address + and length of the screen memory. + + - You can request and change variable information about the hardware, like + visible and virtual geometry, depth, color map format, timing, and so on. + If you try to change that information, the driver maybe will round up some + values to meet the hardware's capabilities (or return EINVAL if that isn't + possible). + + - You can get and set parts of the color map. Communication is done with 16 + bits per color part (red, green, blue, transparency) to support all + existing hardware. The driver does all the computations needed to apply + it to the hardware (round it down to less bits, maybe throw away + transparency). + +All this hardware abstraction makes the implementation of application programs +easier and more portable. E.g. the X server works completely on /dev/fb* and +thus doesn't need to know, for example, how the color registers of the concrete +hardware are organized. XF68_FBDev is a general X server for bitmapped, +unaccelerated video hardware. The only thing that has to be built into +application programs is the screen organization (bitplanes or chunky pixels +etc.), because it works on the frame buffer image data directly. + +For the future it is planned that frame buffer drivers for graphics cards and +the like can be implemented as kernel modules that are loaded at runtime. Such +a driver just has to call register_framebuffer() and supply some functions. +Writing and distributing such drivers independently from the kernel will save +much trouble... + + +3. Frame Buffer Resolution Maintenance +-------------------------------------- + +Frame buffer resolutions are maintained using the utility `fbset'. It can +change the video mode properties of a frame buffer device. Its main usage is +to change the current video mode, e.g. during boot up in one of your /etc/rc.* +or /etc/init.d/* files. + +Fbset uses a video mode database stored in a configuration file, so you can +easily add your own modes and refer to them with a simple identifier. + + +4. The X Server +--------------- + +The X server (XF68_FBDev) is the most notable application program for the frame +buffer device. Starting with XFree86 release 3.2, the X server is part of +XFree86 and has 2 modes: + + - If the `Display' subsection for the `fbdev' driver in the /etc/XF86Config + file contains a + + Modes "default" + + line, the X server will use the scheme discussed above, i.e. it will start + up in the resolution determined by /dev/fb0 (or $FRAMEBUFFER, if set). You + still have to specify the color depth (using the Depth keyword) and virtual + resolution (using the Virtual keyword) though. This is the default for the + configuration file supplied with XFree86. It's the most simple + configuration, but it has some limitations. + + - Therefore it's also possible to specify resolutions in the /etc/XF86Config + file. This allows for on-the-fly resolution switching while retaining the + same virtual desktop size. The frame buffer device that's used is still + /dev/fb0current (or $FRAMEBUFFER), but the available resolutions are + defined by /etc/XF86Config now. The disadvantage is that you have to + specify the timings in a different format (but `fbset -x' may help). + +To tune a video mode, you can use fbset or xvidtune. Note that xvidtune doesn't +work 100% with XF68_FBDev: the reported clock values are always incorrect. + + +5. Video Mode Timings +--------------------- + +A monitor draws an image on the screen by using an electron beam (3 electron +beams for color models, 1 electron beam for monochrome monitors). The front of +the screen is covered by a pattern of colored phosphors (pixels). If a phosphor +is hit by an electron, it emits a photon and thus becomes visible. + +The electron beam draws horizontal lines (scanlines) from left to right, and +from the top to the bottom of the screen. By modifying the intensity of the +electron beam, pixels with various colors and intensities can be shown. + +After each scanline the electron beam has to move back to the left side of the +screen and to the next line: this is called the horizontal retrace. After the +whole screen (frame) was painted, the beam moves back to the upper left corner: +this is called the vertical retrace. During both the horizontal and vertical +retrace, the electron beam is turned off (blanked). + +The speed at which the electron beam paints the pixels is determined by the +dotclock in the graphics board. For a dotclock of e.g. 28.37516 MHz (millions +of cycles per second), each pixel is 35242 ps (picoseconds) long: + + 1/(28.37516E6 Hz) = 35.242E-9 s + +If the screen resolution is 640x480, it will take + + 640*35.242E-9 s = 22.555E-6 s + +to paint the 640 (xres) pixels on one scanline. But the horizontal retrace +also takes time (e.g. 272 `pixels'), so a full scanline takes + + (640+272)*35.242E-9 s = 32.141E-6 s + +We'll say that the horizontal scanrate is about 31 kHz: + + 1/(32.141E-6 s) = 31.113E3 Hz + +A full screen counts 480 (yres) lines, but we have to consider the vertical +retrace too (e.g. 49 `lines'). So a full screen will take + + (480+49)*32.141E-6 s = 17.002E-3 s + +The vertical scanrate is about 59 Hz: + + 1/(17.002E-3 s) = 58.815 Hz + +This means the screen data is refreshed about 59 times per second. To have a +stable picture without visible flicker, VESA recommends a vertical scanrate of +at least 72 Hz. But the perceived flicker is very human dependent: some people +can use 50 Hz without any trouble, while I'll notice if it's less than 80 Hz. + +Since the monitor doesn't know when a new scanline starts, the graphics board +will supply a synchronization pulse (horizontal sync or hsync) for each +scanline. Similarly it supplies a synchronization pulse (vertical sync or +vsync) for each new frame. The position of the image on the screen is +influenced by the moments at which the synchronization pulses occur. + +The following picture summarizes all timings. The horizontal retrace time is +the sum of the left margin, the right margin and the hsync length, while the +vertical retrace time is the sum of the upper margin, the lower margin and the +vsync length. + + +----------+---------------------------------------------+----------+-------+ + | | ↑ | | | + | | |upper_margin | | | + | | ↓ | | | + +----------###############################################----------+-------+ + | # ↑ # | | + | # | # | | + | # | # | | + | # | # | | + | left # | # right | hsync | + | margin # | xres # margin | len | + |<-------->#<---------------+--------------------------->#<-------->|<----->| + | # | # | | + | # | # | | + | # | # | | + | # |yres # | | + | # | # | | + | # | # | | + | # | # | | + | # | # | | + | # | # | | + | # | # | | + | # | # | | + | # | # | | + | # ↓ # | | + +----------###############################################----------+-------+ + | | ↑ | | | + | | |lower_margin | | | + | | ↓ | | | + +----------+---------------------------------------------+----------+-------+ + | | ↑ | | | + | | |vsync_len | | | + | | ↓ | | | + +----------+---------------------------------------------+----------+-------+ + +The frame buffer device expects all horizontal timings in number of dotclocks +(in picoseconds, 1E-12 s), and vertical timings in number of scanlines. + + +6. Converting XFree86 timing values info frame buffer device timings +-------------------------------------------------------------------- + +An XFree86 mode line consists of the following fields: + "800x600" 50 800 856 976 1040 600 637 643 666 + < name > DCF HR SH1 SH2 HFL VR SV1 SV2 VFL + +The frame buffer device uses the following fields: + + - pixclock: pixel clock in ps (pico seconds) + - left_margin: time from sync to picture + - right_margin: time from picture to sync + - upper_margin: time from sync to picture + - lower_margin: time from picture to sync + - hsync_len: length of horizontal sync + - vsync_len: length of vertical sync + +1) Pixelclock: + xfree: in MHz + fb: in picoseconds (ps) + + pixclock = 1000000 / DCF + +2) horizontal timings: + left_margin = HFL - SH2 + right_margin = SH1 - HR + hsync_len = SH2 - SH1 + +3) vertical timings: + upper_margin = VFL - SV2 + lower_margin = SV1 - VR + vsync_len = SV2 - SV1 + +Good examples for VESA timings can be found in the XFree86 source tree, +under "xc/programs/Xserver/hw/xfree86/doc/modeDB.txt". + + +7. References +------------- + +For more specific information about the frame buffer device and its +applications, please refer to the Linux-fbdev website: + + http://linux-fbdev.sourceforge.net/ + +and to the following documentation: + + - The manual pages for fbset: fbset(8), fb.modes(5) + - The manual pages for XFree86: XF68_FBDev(1), XF86Config(4/5) + - The mighty kernel sources: + o linux/drivers/video/ + o linux/include/linux/fb.h + o linux/include/video/ + + + +8. Mailing list +--------------- + +There are several frame buffer device related mailing lists at SourceForge: + - linux-fbdev-announce@lists.sourceforge.net, for announcements, + - linux-fbdev-user@lists.sourceforge.net, for generic user support, + - linux-fbdev-devel@lists.sourceforge.net, for project developers. + +Point your web browser to http://sourceforge.net/projects/linux-fbdev/ for +subscription information and archive browsing. + + +9. Downloading +-------------- + +All necessary files can be found at + + ftp://ftp.uni-erlangen.de/pub/Linux/LOCAL/680x0/ + +and on its mirrors. + +The latest version of fbset can be found at + + http://home.tvd.be/cr26864/Linux/fbdev/ + + +10. Credits +---------- + +This readme was written by Geert Uytterhoeven, partly based on the original +`X-framebuffer.README' by Roman Hodek and Martin Schaller. Section 6 was +provided by Frank Neumann. + +The frame buffer device abstraction was designed by Martin Schaller. diff --git a/Documentation/fb/gxfb.txt b/Documentation/fb/gxfb.txt new file mode 100644 index 0000000..2f64090 --- /dev/null +++ b/Documentation/fb/gxfb.txt @@ -0,0 +1,52 @@ +[This file is cloned from VesaFB/aty128fb] + +What is gxfb? +================= + +This is a graphics framebuffer driver for AMD Geode GX2 based processors. + +Advantages: + + * No need to use AMD's VSA code (or other VESA emulation layer) in the + BIOS. + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts. + * You can run XF68_FBDev on top of /dev/fb0 + * Most important: boot logo :-) + +Disadvantages: + + * graphic mode is slower than text mode... + + +How to use it? +============== + +Switching modes is done using gxfb.mode_option=<resolution>... boot +parameter or using `fbset' program. + +See Documentation/fb/modedb.txt for more information on modedb +resolutions. + + +X11 +=== + +XF68_FBDev should generally work fine, but it is non-accelerated. + + +Configuration +============= + +You can pass kernel command line options to gxfb with gxfb.<option>. +For example, gxfb.mode_option=800x600@75. +Accepted options: + +mode_option - specify the video mode. Of the form + <x>x<y>[-<bpp>][@<refresh>] +vram - size of video ram (normally auto-detected) +vt_switch - enable vt switching during suspend/resume. The vt + switch is slow, but harmless. + +-- +Andres Salomon <dilinger@debian.org> diff --git a/Documentation/fb/imacfb.txt b/Documentation/fb/imacfb.txt new file mode 100644 index 0000000..316ec9b --- /dev/null +++ b/Documentation/fb/imacfb.txt @@ -0,0 +1,31 @@ + +What is imacfb? +=============== + +This is a generic EFI platform driver for Intel based Apple computers. +Imacfb is only for EFI booted Intel Macs. + +Supported Hardware +================== + +iMac 17"/20" +Macbook +Macbook Pro 15"/17" +MacMini + +How to use it? +============== + +Imacfb does not have any kind of autodetection of your machine. +You have to add the following kernel parameters in your elilo.conf: + Macbook : + video=imacfb:macbook + MacMini : + video=imacfb:mini + Macbook Pro 15", iMac 17" : + video=imacfb:i17 + Macbook Pro 17", iMac 20" : + video=imacfb:i20 + +-- +Edgar Hucek <gimli@dark-green.com> diff --git a/Documentation/fb/intel810.txt b/Documentation/fb/intel810.txt new file mode 100644 index 0000000..be3e783 --- /dev/null +++ b/Documentation/fb/intel810.txt @@ -0,0 +1,278 @@ +Intel 810/815 Framebuffer driver + Tony Daplas <adaplas@pol.net> + http://i810fb.sourceforge.net + + March 17, 2002 + + First Released: July 2001 + Last Update: September 12, 2005 +================================================================ + +A. Introduction + + This is a framebuffer driver for various Intel 810/815 compatible + graphics devices. These include: + + Intel 810 + Intel 810E + Intel 810-DC100 + Intel 815 Internal graphics only, 100Mhz FSB + Intel 815 Internal graphics only + Intel 815 Internal graphics and AGP + +B. Features + + - Choice of using Discrete Video Timings, VESA Generalized Timing + Formula, or a framebuffer specific database to set the video mode + + - Supports a variable range of horizontal and vertical resolution and + vertical refresh rates if the VESA Generalized Timing Formula is + enabled. + + - Supports color depths of 8, 16, 24 and 32 bits per pixel + + - Supports pseudocolor, directcolor, or truecolor visuals + + - Full and optimized hardware acceleration at 8, 16 and 24 bpp + + - Robust video state save and restore + + - MTRR support + + - Utilizes user-entered monitor specifications to automatically + calculate required video mode parameters. + + - Can concurrently run with xfree86 running with native i810 drivers + + - Hardware Cursor Support + + - Supports EDID probing either by DDC/I2C or through the BIOS + +C. List of available options + + a. "video=i810fb" + enables the i810 driver + + Recommendation: required + + b. "xres:<value>" + select horizontal resolution in pixels. (This parameter will be + ignored if 'mode_option' is specified. See 'o' below). + + Recommendation: user preference + (default = 640) + + c. "yres:<value>" + select vertical resolution in scanlines. If Discrete Video Timings + is enabled, this will be ignored and computed as 3*xres/4. (This + parameter will be ignored if 'mode_option' is specified. See 'o' + below) + + Recommendation: user preference + (default = 480) + + d. "vyres:<value>" + select virtual vertical resolution in scanlines. If (0) or none + is specified, this will be computed against maximum available memory. + + Recommendation: do not set + (default = 480) + + e. "vram:<value>" + select amount of system RAM in MB to allocate for the video memory + + Recommendation: 1 - 4 MB. + (default = 4) + + f. "bpp:<value>" + select desired pixel depth + + Recommendation: 8 + (default = 8) + + g. "hsync1/hsync2:<value>" + select the minimum and maximum Horizontal Sync Frequency of the + monitor in kHz. If using a fixed frequency monitor, hsync1 must + be equal to hsync2. If EDID probing is successful, these will be + ignored and values will be taken from the EDID block. + + Recommendation: check monitor manual for correct values + (default = 29/30) + + h. "vsync1/vsync2:<value>" + select the minimum and maximum Vertical Sync Frequency of the monitor + in Hz. You can also use this option to lock your monitor's refresh + rate. If EDID probing is successful, these will be ignored and values + will be taken from the EDID block. + + Recommendation: check monitor manual for correct values + (default = 60/60) + + IMPORTANT: If you need to clamp your timings, try to give some + leeway for computational errors (over/underflows). Example: if + using vsync1/vsync2 = 60/60, make sure hsync1/hsync2 has at least + a 1 unit difference, and vice versa. + + i. "voffset:<value>" + select at what offset in MB of the logical memory to allocate the + framebuffer memory. The intent is to avoid the memory blocks + used by standard graphics applications (XFree86). The default + offset (16 MB for a 64 MB aperture, 8 MB for a 32 MB aperture) will + avoid XFree86's usage and allows up to 7 MB/15 MB of framebuffer + memory. Depending on your usage, adjust the value up or down + (0 for maximum usage, 31/63 MB for the least amount). Note, an + arbitrary setting may conflict with XFree86. + + Recommendation: do not set + (default = 8 or 16 MB) + + j. "accel" + enable text acceleration. This can be enabled/reenabled anytime + by using 'fbset -accel true/false'. + + Recommendation: enable + (default = not set) + + k. "mtrr" + enable MTRR. This allows data transfers to the framebuffer memory + to occur in bursts which can significantly increase performance. + Not very helpful with the i810/i815 because of 'shared memory'. + + Recommendation: do not set + (default = not set) + + l. "extvga" + if specified, secondary/external VGA output will always be enabled. + Useful if the BIOS turns off the VGA port when no monitor is attached. + The external VGA monitor can then be attached without rebooting. + + Recommendation: do not set + (default = not set) + + m. "sync" + Forces the hardware engine to do a "sync" or wait for the hardware + to finish before starting another instruction. This will produce a + more stable setup, but will be slower. + + Recommendation: do not set + (default = not set) + + n. "dcolor" + Use directcolor visual instead of truecolor for pixel depths greater + than 8 bpp. Useful for color tuning, such as gamma control. + + Recommendation: do not set + (default = not set) + + o. <xres>x<yres>[-<bpp>][@<refresh>] + The driver will now accept specification of boot mode option. If this + is specified, the options 'xres' and 'yres' will be ignored. See + Documentation/fb/modedb.txt for usage. + +D. Kernel booting + +Separate each option/option-pair by commas (,) and the option from its value +with a colon (:) as in the following: + +video=i810fb:option1,option2:value2 + +Sample Usage +------------ + +In /etc/lilo.conf, add the line: + +append="video=i810fb:vram:2,xres:1024,yres:768,bpp:8,hsync1:30,hsync2:55, \ + vsync1:50,vsync2:85,accel,mtrr" + +This will initialize the framebuffer to 1024x768 at 8bpp. The framebuffer +will use 2 MB of System RAM. MTRR support will be enabled. The refresh rate +will be computed based on the hsync1/hsync2 and vsync1/vsync2 values. + +IMPORTANT: +You must include hsync1, hsync2, vsync1 and vsync2 to enable video modes +better than 640x480 at 60Hz. HOWEVER, if your chipset/display combination +supports I2C and has an EDID block, you can safely exclude hsync1, hsync2, +vsync1 and vsync2 parameters. These parameters will be taken from the EDID +block. + +E. Module options + +The module parameters are essentially similar to the kernel +parameters. The main difference is that you need to include a Boolean value +(1 for TRUE, and 0 for FALSE) for those options which don't need a value. + +Example, to enable MTRR, include "mtrr=1". + +Sample Usage +------------ + +Using the same setup as described above, load the module like this: + + modprobe i810fb vram=2 xres=1024 bpp=8 hsync1=30 hsync2=55 vsync1=50 \ + vsync2=85 accel=1 mtrr=1 + +Or just add the following to /etc/modprobe.conf + + options i810fb vram=2 xres=1024 bpp=16 hsync1=30 hsync2=55 vsync1=50 \ + vsync2=85 accel=1 mtrr=1 + +and just do a + + modprobe i810fb + + +F. Setup + + a. Do your usual method of configuring the kernel. + + make menuconfig/xconfig/config + + b. Under "Code maturity level options" enable "Prompt for development + and/or incomplete code/drivers". + + c. Enable agpgart support for the Intel 810/815 on-board graphics. + This is required. The option is under "Character Devices". + + d. Under "Graphics Support", select "Intel 810/815" either statically + or as a module. Choose "use VESA Generalized Timing Formula" if + you need to maximize the capability of your display. To be on the + safe side, you can leave this unselected. + + e. If you want support for DDC/I2C probing (Plug and Play Displays), + set 'Enable DDC Support' to 'y'. To make this option appear, set + 'use VESA Generalized Timing Formula' to 'y'. + + f. If you want a framebuffer console, enable it under "Console + Drivers". + + g. Compile your kernel. + + h. Load the driver as described in sections D and E. + + i. Try the DirectFB (http://www.directfb.org) + the i810 gfxdriver + patch to see the chipset in action (or inaction :-). + +G. Acknowledgment: + + 1. Geert Uytterhoeven - his excellent howto and the virtual + framebuffer driver code made this possible. + + 2. Jeff Hartmann for his agpgart code. + + 3. The X developers. Insights were provided just by reading the + XFree86 source code. + + 4. Intel(c). For this value-oriented chipset driver and for + providing documentation. + + 5. Matt Sottek. His inputs and ideas helped in making some + optimizations possible. + +H. Home Page: + + A more complete, and probably updated information is provided at + http://i810fb.sourceforge.net. + +########################### +Tony + diff --git a/Documentation/fb/intelfb.txt b/Documentation/fb/intelfb.txt new file mode 100644 index 0000000..dd9e944 --- /dev/null +++ b/Documentation/fb/intelfb.txt @@ -0,0 +1,149 @@ +Intel 830M/845G/852GM/855GM/865G/915G/945G Framebuffer driver +================================================================ + +A. Introduction + This is a framebuffer driver for various Intel 8xx/9xx compatible +graphics devices. These would include: + + Intel 830M + Intel 845G + Intel 852GM + Intel 855GM + Intel 865G + Intel 915G + Intel 915GM + Intel 945G + Intel 945GM + Intel 945GME + Intel 965G + Intel 965GM + +B. List of available options + + a. "video=intelfb" + enables the intelfb driver + + Recommendation: required + + b. "mode=<xres>x<yres>[-<bpp>][@<refresh>]" + select mode + + Recommendation: user preference + (default = 1024x768-32@70) + + c. "vram=<value>" + select amount of system RAM in MB to allocate for the video memory + if not enough RAM was already allocated by the BIOS. + + Recommendation: 1 - 4 MB. + (default = 4 MB) + + d. "voffset=<value>" + select at what offset in MB of the logical memory to allocate the + framebuffer memory. The intent is to avoid the memory blocks + used by standard graphics applications (XFree86). Depending on your + usage, adjust the value up or down, (0 for maximum usage, 63/127 MB + for the least amount). Note, an arbitrary setting may conflict + with XFree86. + + Recommendation: do not set + (default = 48 MB) + + e. "accel" + enable text acceleration. This can be enabled/reenabled anytime + by using 'fbset -accel true/false'. + + Recommendation: enable + (default = set) + + f. "hwcursor" + enable cursor acceleration. + + Recommendation: enable + (default = set) + + g. "mtrr" + enable MTRR. This allows data transfers to the framebuffer memory + to occur in bursts which can significantly increase performance. + Not very helpful with the intel chips because of 'shared memory'. + + Recommendation: set + (default = set) + + h. "fixed" + disable mode switching. + + Recommendation: do not set + (default = not set) + + The binary parameters can be unset with a "no" prefix, example "noaccel". + The default parameter (not named) is the mode. + +C. Kernel booting + +Separate each option/option-pair by commas (,) and the option from its value +with an equals sign (=) as in the following: + +video=intelfb:option1,option2=value2 + +Sample Usage +------------ + +In /etc/lilo.conf, add the line: + +append="video=intelfb:mode=800x600-32@75,accel,hwcursor,vram=8" + +This will initialize the framebuffer to 800x600 at 32bpp and 75Hz. The +framebuffer will use 8 MB of System RAM. hw acceleration of text and cursor +will be enabled. + +Remarks +------- + +If setting this parameter doesn't work (you stay in a 80x25 text-mode), +you might need to set the "vga=<mode>" parameter too - see vesafb.txt +in this directory. + + +D. Module options + + The module parameters are essentially similar to the kernel +parameters. The main difference is that you need to include a Boolean value +(1 for TRUE, and 0 for FALSE) for those options which don't need a value. + +Example, to enable MTRR, include "mtrr=1". + +Sample Usage +------------ + +Using the same setup as described above, load the module like this: + + modprobe intelfb mode=800x600-32@75 vram=8 accel=1 hwcursor=1 + +Or just add the following to /etc/modprobe.conf + + options intelfb mode=800x600-32@75 vram=8 accel=1 hwcursor=1 + +and just do a + + modprobe intelfb + + +E. Acknowledgment: + + 1. Geert Uytterhoeven - his excellent howto and the virtual + framebuffer driver code made this possible. + + 2. Jeff Hartmann for his agpgart code. + + 3. David Dawes for his original kernel 2.4 code. + + 4. The X developers. Insights were provided just by reading the + XFree86 source code. + + 5. Antonino A. Daplas for his inspiring i810fb driver. + + 6. Andrew Morton for his kernel patches maintenance. + +########################### +Sylvain diff --git a/Documentation/fb/internals.txt b/Documentation/fb/internals.txt new file mode 100644 index 0000000..9b2a2b2 --- /dev/null +++ b/Documentation/fb/internals.txt @@ -0,0 +1,82 @@ + +This is a first start for some documentation about frame buffer device +internals. + +Geert Uytterhoeven <geert@linux-m68k.org>, 21 July 1998 +James Simmons <jsimmons@user.sf.net>, Nov 26 2002 + +-------------------------------------------------------------------------------- + + *** STRUCTURES USED BY THE FRAME BUFFER DEVICE API *** + +The following structures play a role in the game of frame buffer devices. They +are defined in <linux/fb.h>. + +1. Outside the kernel (user space) + + - struct fb_fix_screeninfo + + Device independent unchangeable information about a frame buffer device and + a specific video mode. This can be obtained using the FBIOGET_FSCREENINFO + ioctl. + + - struct fb_var_screeninfo + + Device independent changeable information about a frame buffer device and a + specific video mode. This can be obtained using the FBIOGET_VSCREENINFO + ioctl, and updated with the FBIOPUT_VSCREENINFO ioctl. If you want to pan + the screen only, you can use the FBIOPAN_DISPLAY ioctl. + + - struct fb_cmap + + Device independent colormap information. You can get and set the colormap + using the FBIOGETCMAP and FBIOPUTCMAP ioctls. + + +2. Inside the kernel + + - struct fb_info + + Generic information, API and low level information about a specific frame + buffer device instance (slot number, board address, ...). + + - struct `par' + + Device dependent information that uniquely defines the video mode for this + particular piece of hardware. + + +-------------------------------------------------------------------------------- + + *** VISUALS USED BY THE FRAME BUFFER DEVICE API *** + + +Monochrome (FB_VISUAL_MONO01 and FB_VISUAL_MONO10) +------------------------------------------------- +Each pixel is either black or white. + + +Pseudo color (FB_VISUAL_PSEUDOCOLOR and FB_VISUAL_STATIC_PSEUDOCOLOR) +--------------------------------------------------------------------- +The whole pixel value is fed through a programmable lookup table that has one +color (including red, green, and blue intensities) for each possible pixel +value, and that color is displayed. + + +True color (FB_VISUAL_TRUECOLOR) +-------------------------------- +The pixel value is broken up into red, green, and blue fields. + + +Direct color (FB_VISUAL_DIRECTCOLOR) +------------------------------------ +The pixel value is broken up into red, green, and blue fields, each of which +are looked up in separate red, green, and blue lookup tables. + + +Grayscale displays +------------------ +Grayscale and static grayscale are special variants of pseudo color and static +pseudo color, where the red, green and blue components are always equal to +each other. + diff --git a/Documentation/fb/lxfb.txt b/Documentation/fb/lxfb.txt new file mode 100644 index 0000000..38b3ca6 --- /dev/null +++ b/Documentation/fb/lxfb.txt @@ -0,0 +1,52 @@ +[This file is cloned from VesaFB/aty128fb] + +What is lxfb? +================= + +This is a graphics framebuffer driver for AMD Geode LX based processors. + +Advantages: + + * No need to use AMD's VSA code (or other VESA emulation layer) in the + BIOS. + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts. + * You can run XF68_FBDev on top of /dev/fb0 + * Most important: boot logo :-) + +Disadvantages: + + * graphic mode is slower than text mode... + + +How to use it? +============== + +Switching modes is done using lxfb.mode_option=<resolution>... boot +parameter or using `fbset' program. + +See Documentation/fb/modedb.txt for more information on modedb +resolutions. + + +X11 +=== + +XF68_FBDev should generally work fine, but it is non-accelerated. + + +Configuration +============= + +You can pass kernel command line options to lxfb with lxfb.<option>. +For example, lxfb.mode_option=800x600@75. +Accepted options: + +mode_option - specify the video mode. Of the form + <x>x<y>[-<bpp>][@<refresh>] +vram - size of video ram (normally auto-detected) +vt_switch - enable vt switching during suspend/resume. The vt + switch is slow, but harmless. + +-- +Andres Salomon <dilinger@debian.org> diff --git a/Documentation/fb/matroxfb.txt b/Documentation/fb/matroxfb.txt new file mode 100644 index 0000000..ad7a677 --- /dev/null +++ b/Documentation/fb/matroxfb.txt @@ -0,0 +1,415 @@ +[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 Millenium and + Millenium 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 for driver with multihead support + and first working device (usually dev:0) for driver without + multihead support. +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-Millenium. +nocross4MB - pixel line must not cross 4MB boundary. It is default for + Millenium 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> diff --git a/Documentation/fb/metronomefb.txt b/Documentation/fb/metronomefb.txt new file mode 100644 index 0000000..237ca41 --- /dev/null +++ b/Documentation/fb/metronomefb.txt @@ -0,0 +1,36 @@ + Metronomefb + ----------- +Maintained by Jaya Kumar <jayakumar.lkml.gmail.com> +Last revised: Mar 10, 2008 + +Metronomefb is a driver for the Metronome display controller. The controller +is from E-Ink Corporation. It is intended to be used to drive the E-Ink +Vizplex display media. E-Ink hosts some details of this controller and the +display media here http://www.e-ink.com/products/matrix/metronome.html . + +Metronome is interfaced to the host CPU through the AMLCD interface. The +host CPU generates the control information and the image in a framebuffer +which is then delivered to the AMLCD interface by a host specific method. +The display and error status are each pulled through individual GPIOs. + +Metronomefb is platform independent and depends on a board specific driver +to do all physical IO work. Currently, an example is implemented for the +PXA board used in the AM-200 EPD devkit. This example is am200epd.c + +Metronomefb requires waveform information which is delivered via the AMLCD +interface to the metronome controller. The waveform information is expected to +be delivered from userspace via the firmware class interface. The waveform file +can be compressed as long as your udev or hotplug script is aware of the need +to uncompress it before delivering it. metronomefb will ask for metronome.wbf +which would typically go into /lib/firmware/metronome.wbf depending on your +udev/hotplug setup. I have only tested with a single waveform file which was +originally labeled 23P01201_60_WT0107_MTC. I do not know what it stands for. +Caution should be exercised when manipulating the waveform as there may be +a possibility that it could have some permanent effects on the display media. +I neither have access to nor know exactly what the waveform does in terms of +the physical media. + +Metronomefb uses the deferred IO interface so that it can provide a memory +mappable frame buffer. It has been tested with tinyx (Xfbdev). It is known +to work at this time with xeyes, xclock, xloadimage, xpdf. + diff --git a/Documentation/fb/modedb.txt b/Documentation/fb/modedb.txt new file mode 100644 index 0000000..ec4dee7 --- /dev/null +++ b/Documentation/fb/modedb.txt @@ -0,0 +1,136 @@ + + + modedb default video mode support + + +Currently all frame buffer device drivers have their own video mode databases, +which is a mess and a waste of resources. The main idea of modedb is to have + + - one routine to probe for video modes, which can be used by all frame buffer + devices + - one generic video mode database with a fair amount of standard videomodes + (taken from XFree86) + - the possibility to supply your own mode database for graphics hardware that + needs non-standard modes, like amifb and Mac frame buffer drivers (which + use macmodes.c) + +When a frame buffer device receives a video= option it doesn't know, it should +consider that to be a video mode option. If no frame buffer device is specified +in a video= option, fbmem considers that to be a global video mode option. + +Valid mode specifiers (mode_option argument): + + <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] + <name>[-<bpp>][@<refresh>] + +with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string. +Things between square brackets are optional. + +If 'M' is specified in the mode_option argument (after <yres> and before +<bpp> and <refresh>, if specified) the timings will be calculated using +VESA(TM) Coordinated Video Timings instead of looking up the mode from a table. +If 'R' is specified, do a 'reduced blanking' calculation for digital displays. +If 'i' is specified, calculate for an interlaced mode. And if 'm' is +specified, add margins to the calculation (1.8% of xres rounded down to 8 +pixels and 1.8% of yres). + + Sample usage: 1024x768M@60m - CVT timing with margins + +***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** + +What is the VESA(TM) Coordinated Video Timings (CVT)? + +From the VESA(TM) Website: + + "The purpose of CVT is to provide a method for generating a consistent + and coordinated set of standard formats, display refresh rates, and + timing specifications for computer display products, both those + employing CRTs, and those using other display technologies. The + intention of CVT is to give both source and display manufacturers a + common set of tools to enable new timings to be developed in a + consistent manner that ensures greater compatibility." + +This is the third standard approved by VESA(TM) concerning video timings. The +first was the Discrete Video Timings (DVT) which is a collection of +pre-defined modes approved by VESA(TM). The second is the Generalized Timing +Formula (GTF) which is an algorithm to calculate the timings, given the +pixelclock, the horizontal sync frequency, or the vertical refresh rate. + +The GTF is limited by the fact that it is designed mainly for CRT displays. +It artificially increases the pixelclock because of its high blanking +requirement. This is inappropriate for digital display interface with its high +data rate which requires that it conserves the pixelclock as much as possible. +Also, GTF does not take into account the aspect ratio of the display. + +The CVT addresses these limitations. If used with CRT's, the formula used +is a derivation of GTF with a few modifications. If used with digital +displays, the "reduced blanking" calculation can be used. + +From the framebuffer subsystem perspective, new formats need not be added +to the global mode database whenever a new mode is released by display +manufacturers. Specifying for CVT will work for most, if not all, relatively +new CRT displays and probably with most flatpanels, if 'reduced blanking' +calculation is specified. (The CVT compatibility of the display can be +determined from its EDID. The version 1.3 of the EDID has extra 128-byte +blocks where additional timing information is placed. As of this time, there +is no support yet in the layer to parse this additional blocks.) + +CVT also introduced a new naming convention (should be seen from dmesg output): + + <pix>M<a>[-R] + + where: pix = total amount of pixels in MB (xres x yres) + M = always present + a = aspect ratio (3 - 4:3; 4 - 5:4; 9 - 15:9, 16:9; A - 16:10) + -R = reduced blanking + + example: .48M3-R - 800x600 with reduced blanking + +Note: VESA(TM) has restrictions on what is a standard CVT timing: + + - aspect ratio can only be one of the above values + - acceptable refresh rates are 50, 60, 70 or 85 Hz only + - if reduced blanking, the refresh rate must be at 60Hz + +If one of the above are not satisfied, the kernel will print a warning but the +timings will still be calculated. + +***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** + +To find a suitable video mode, you just call + +int __init fb_find_mode(struct fb_var_screeninfo *var, + struct fb_info *info, const char *mode_option, + const struct fb_videomode *db, unsigned int dbsize, + const struct fb_videomode *default_mode, + unsigned int default_bpp) + +with db/dbsize your non-standard video mode database, or NULL to use the +standard video mode database. + +fb_find_mode() first tries the specified video mode (or any mode that matches, +e.g. there can be multiple 640x480 modes, each of them is tried). If that +fails, the default mode is tried. If that fails, it walks over all modes. + +To specify a video mode at bootup, use the following boot options: + video=<driver>:<xres>x<yres>[-<bpp>][@refresh] + +where <driver> is a name from the table below. Valid default modes can be +found in linux/drivers/video/modedb.c. Check your driver's documentation. +There may be more modes. + + Drivers that support modedb boot options + Boot Name Cards Supported + + amifb - Amiga chipset frame buffer + aty128fb - ATI Rage128 / Pro frame buffer + atyfb - ATI Mach64 frame buffer + pm2fb - Permedia 2/2V frame buffer + pm3fb - Permedia 3 frame buffer + sstfb - Voodoo 1/2 (SST1) chipset frame buffer + tdfxfb - 3D Fx frame buffer + tridentfb - Trident (Cyber)blade chipset frame buffer + vt8623fb - VIA 8623 frame buffer + +BTW, only a few drivers use this at the moment. Others are to follow +(feel free to send patches). diff --git a/Documentation/fb/pvr2fb.txt b/Documentation/fb/pvr2fb.txt new file mode 100644 index 0000000..36bdeff --- /dev/null +++ b/Documentation/fb/pvr2fb.txt @@ -0,0 +1,65 @@ +$Id: pvr2fb.txt,v 1.1 2001/05/24 05:09:16 mrbrown Exp $ + +What is pvr2fb? +=============== + +This is a driver for PowerVR 2 based graphics frame buffers, such as the +one found in the Dreamcast. + +Advantages: + + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts (NOT on the Dreamcast) + * You can run XF86_FBDev on top of /dev/fb0 + * Most important: boot logo :-) + +Disadvantages: + + * Driver is largely untested on non-Dreamcast systems. + +Configuration +============= + +You can pass kernel command line options to pvr2fb with +`video=pvr2fb:option1,option2:value2,option3' (multiple options should be +separated by comma, values are separated from options by `:'). +Accepted options: + +font:X - default font to use. All fonts are supported, including the + SUN12x22 font which is very nice at high resolutions. + + +mode:X - default video mode with format [xres]x[yres]-<bpp>@<refresh rate> + The following video modes are supported: + 640x640-16@60, 640x480-24@60, 640x480-32@60. The Dreamcast + defaults to 640x480-16@60. At the time of writing the + 24bpp and 32bpp modes function poorly. Work to fix that is + ongoing + + Note: the 640x240 mode is currently broken, and should not be + used for any reason. It is only mentioned here as a reference. + +inverse - invert colors on screen (for LCD displays) + +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 is enabled by default on systems that have it + configured and that support it. + +cable:X - cable type. This can be any of the following: vga, rgb, and + composite. If none is specified, we guess. + +output:X - output type. This can be any of the following: pal, ntsc, and + vga. If none is specified, we guess. + +X11 +=== + +XF86_FBDev has been shown to work on the Dreamcast in the past - though not yet +on any 2.6 series kernel. + +-- +Paul Mundt <lethal@linuxdc.org> +Updated by Adrian McMenamin <adrian@mcmen.demon.co.uk> + diff --git a/Documentation/fb/pxafb.txt b/Documentation/fb/pxafb.txt new file mode 100644 index 0000000..db9b850 --- /dev/null +++ b/Documentation/fb/pxafb.txt @@ -0,0 +1,54 @@ +Driver for PXA25x LCD controller +================================ + +The driver supports the following options, either via +options=<OPTIONS> when modular or video=pxafb:<OPTIONS> when built in. + +For example: + modprobe pxafb options=mode:640x480-8,passive +or on the kernel command line + video=pxafb:mode:640x480-8,passive + +mode:XRESxYRES[-BPP] + XRES == LCCR1_PPL + 1 + YRES == LLCR2_LPP + 1 + The resolution of the display in pixels + BPP == The bit depth. Valid values are 1, 2, 4, 8 and 16. + +pixclock:PIXCLOCK + Pixel clock in picoseconds + +left:LEFT == LCCR1_BLW + 1 +right:RIGHT == LCCR1_ELW + 1 +hsynclen:HSYNC == LCCR1_HSW + 1 +upper:UPPER == LCCR2_BFW +lower:LOWER == LCCR2_EFR +vsynclen:VSYNC == LCCR2_VSW + 1 + Display margins and sync times + +color | mono => LCCR0_CMS + umm... + +active | passive => LCCR0_PAS + Active (TFT) or Passive (STN) display + +single | dual => LCCR0_SDS + Single or dual panel passive display + +4pix | 8pix => LCCR0_DPD + 4 or 8 pixel monochrome single panel data + +hsync:HSYNC +vsync:VSYNC + Horizontal and vertical sync. 0 => active low, 1 => active + high. + +dpc:DPC + Double pixel clock. 1=>true, 0=>false + +outputen:POLARITY + Output Enable Polarity. 0 => active low, 1 => active high + +pixclockpol:POLARITY + pixel clock polarity + 0 => falling edge, 1 => rising edge diff --git a/Documentation/fb/s3fb.txt b/Documentation/fb/s3fb.txt new file mode 100644 index 0000000..2c97770 --- /dev/null +++ b/Documentation/fb/s3fb.txt @@ -0,0 +1,82 @@ + + s3fb - fbdev driver for S3 Trio/Virge chips + =========================================== + + +Supported Hardware +================== + + S3 Trio32 + S3 Trio64 (and variants V+, UV+, V2/DX, V2/GX) + S3 Virge (and variants VX, DX, GX and GX2+) + S3 Plato/PX (completely untested) + S3 Aurora64V+ (completely untested) + + - only PCI bus supported + - only BIOS initialized VGA devices supported + - probably not working on big endian + +I tested s3fb on Trio64 (plain, V+ and V2/DX) and Virge (plain, VX, DX), +all on i386. + + +Supported Features +================== + + * 4 bpp pseudocolor modes (with 18bit palette, two variants) + * 8 bpp pseudocolor mode (with 18bit palette) + * 16 bpp truecolor modes (RGB 555 and RGB 565) + * 24 bpp truecolor mode (RGB 888) on (only on Virge VX) + * 32 bpp truecolor mode (RGB 888) on (not on Virge VX) + * text mode (activated by bpp = 0) + * interlaced mode variant (not available in text mode) + * doublescan mode variant (not available in text mode) + * panning in both directions + * suspend/resume support + * DPMS support + +Text mode is supported even in higher resolutions, but there is limitation to +lower pixclocks (maximum usually between 50-60 MHz, depending on specific +hardware, i get best results from plain S3 Trio32 card - about 75 MHz). This +limitation is not enforced by driver. Text mode supports 8bit wide fonts only +(hardware limitation) and 16bit tall fonts (driver limitation). Text mode +support is broken on S3 Trio64 V2/DX. + +There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with +packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode +with interleaved planes (1 byte interleave), MSB first. Both modes support +8bit wide fonts only (driver limitation). + +Suspend/resume works on systems that initialize video card during resume and +if device is active (for example used by fbcon). + + +Missing Features +================ +(alias TODO list) + + * secondary (not initialized by BIOS) device support + * big endian support + * Zorro bus support + * MMIO support + * 24 bpp mode support on more cards + * support for fontwidths != 8 in 4 bpp modes + * support for fontheight != 16 in text mode + * composite and external sync (is anyone able to test this?) + * hardware cursor + * video overlay support + * vsync synchronization + * feature connector support + * acceleration support (8514-like 2D, Virge 3D, busmaster transfers) + * better values for some magic registers (performance issues) + + +Known bugs +========== + + * cursor disable in text mode doesn't work + * text mode broken on S3 Trio64 V2/DX + + +-- +Ondrej Zajicek <santiago@crfreenet.org> diff --git a/Documentation/fb/sa1100fb.txt b/Documentation/fb/sa1100fb.txt new file mode 100644 index 0000000..f1b4220 --- /dev/null +++ b/Documentation/fb/sa1100fb.txt @@ -0,0 +1,39 @@ +[This file is cloned from VesaFB/matroxfb] + +What is sa1100fb? +================= + +This is a driver for a graphic framebuffer for the SA-1100 LCD +controller. + +Configuration +============== + +For most common passive displays, giving the option + +video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value> + +on the kernel command line should be enough to configure the +controller. The bits per pixel (bpp) value should be 4, 8, 12, or +16. LCCR values are display-specific and should be computed as +documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel +displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2> +are used for the lower panel. + +For active displays or displays requiring additional configuration +(controlling backlights, powering on the LCD, etc.), the command line +options may not be enough to configure the display. Adding sections to +sa1100fb_init_fbinfo(), sa1100fb_activate_var(), +sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller() +will probably be necessary. + +Accepted options: + +bpp:<value> Configure for <value> bits per pixel +lccr0:<value> Configure LCD control register 0 (11.7.3) +lccr1:<value> Configure LCD control register 1 (11.7.4) +lccr2:<value> Configure LCD control register 2 (11.7.5) +lccr3:<value> Configure LCD control register 3 (11.7.6) + +-- +Mark Huang <mhuang@livetoy.com> diff --git a/Documentation/fb/sh7760fb.txt b/Documentation/fb/sh7760fb.txt new file mode 100644 index 0000000..c87bfe5 --- /dev/null +++ b/Documentation/fb/sh7760fb.txt @@ -0,0 +1,131 @@ +SH7760/SH7763 integrated LCDC Framebuffer driver +================================================ + +0. Overwiew +----------- +The SH7760/SH7763 have an integrated LCD Display controller (LCDC) which +supports (in theory) resolutions ranging from 1x1 to 1024x1024, +with color depths ranging from 1 to 16 bits, on STN, DSTN and TFT Panels. + +Caveats: +* Framebuffer memory must be a large chunk allocated at the top + of Area3 (HW requirement). Because of this requirement you should NOT + make the driver a module since at runtime it may become impossible to + get a large enough contiguous chunk of memory. + +* The driver does not support changing resolution while loaded + (displays aren't hotpluggable anyway) + +* Heavy flickering may be observed + a) if you're using 15/16bit color modes at >= 640x480 px resolutions, + b) during PCMCIA (or any other slow bus) activity. + +* Rotation works only 90degress clockwise, and only if horizontal + resolution is <= 320 pixels. + +files: drivers/video/sh7760fb.c + include/asm-sh/sh7760fb.h + Documentation/fb/sh7760fb.txt + +1. Platform setup +----------------- +SH7760: + Video data is fetched via the DMABRG DMA engine, so you have to + configure the SH DMAC for DMABRG mode (write 0x94808080 to the + DMARSRA register somewhere at boot). + + PFC registers PCCR and PCDR must be set to peripheral mode. + (write zeros to both). + +The driver does NOT do the above for you since board setup is, well, job +of the board setup code. + +2. Panel definitions +-------------------- +The LCDC must explicitly be told about the type of LCD panel +attached. Data must be wrapped in a "struct sh7760fb_platdata" and +passed to the driver as platform_data. + +Suggest you take a closer look at the SH7760 Manual, Section 30. +(http://documentation.renesas.com/eng/products/mpumcu/e602291_sh7760.pdf) + +The following code illustrates what needs to be done to +get the framebuffer working on a 640x480 TFT: + +====================== cut here ====================================== + +#include <linux/fb.h> +#include <asm/sh7760fb.h> + +/* + * NEC NL6440bc26-01 640x480 TFT + * dotclock 25175 kHz + * Xres 640 Yres 480 + * Htotal 800 Vtotal 525 + * HsynStart 656 VsynStart 490 + * HsynLenn 30 VsynLenn 2 + * + * The linux framebuffer layer does not use the syncstart/synclen + * values but right/left/upper/lower margin values. The comments + * for the x_margin explain how to calculate those from given + * panel sync timings. + */ +static struct fb_videomode nl6448bc26 = { + .name = "NL6448BC26", + .refresh = 60, + .xres = 640, + .yres = 480, + .pixclock = 39683, /* in picoseconds! */ + .hsync_len = 30, + .vsync_len = 2, + .left_margin = 114, /* HTOT - (HSYNSLEN + HSYNSTART) */ + .right_margin = 16, /* HSYNSTART - XRES */ + .upper_margin = 33, /* VTOT - (VSYNLEN + VSYNSTART) */ + .lower_margin = 10, /* VSYNSTART - YRES */ + .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, + .vmode = FB_VMODE_NONINTERLACED, + .flag = 0, +}; + +static struct sh7760fb_platdata sh7760fb_nl6448 = { + .def_mode = &nl6448bc26, + .ldmtr = LDMTR_TFT_COLOR_16, /* 16bit TFT panel */ + .lddfr = LDDFR_8BPP, /* we want 8bit output */ + .ldpmmr = 0x0070, + .ldpspr = 0x0500, + .ldaclnr = 0, + .ldickr = LDICKR_CLKSRC(LCDC_CLKSRC_EXTERNAL) | + LDICKR_CLKDIV(1), + .rotate = 0, + .novsync = 1, + .blank = NULL, +}; + +/* SH7760: + * 0xFE300800: 256 * 4byte xRGB palette ram + * 0xFE300C00: 42 bytes ctrl registers + */ +static struct resource sh7760_lcdc_res[] = { + [0] = { + .start = 0xFE300800, + .end = 0xFE300CFF, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = 65, + .end = 65, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device sh7760_lcdc_dev = { + .dev = { + .platform_data = &sh7760fb_nl6448, + }, + .name = "sh7760-lcdc", + .id = -1, + .resource = sh7760_lcdc_res, + .num_resources = ARRAY_SIZE(sh7760_lcdc_res), +}; + +====================== cut here ====================================== diff --git a/Documentation/fb/sisfb.txt b/Documentation/fb/sisfb.txt new file mode 100644 index 0000000..2e68e50 --- /dev/null +++ b/Documentation/fb/sisfb.txt @@ -0,0 +1,158 @@ + +What is sisfb? +============== + +sisfb is a framebuffer device driver for SiS (Silicon Integrated Systems) +graphics chips. Supported are: + +- SiS 300 series: SiS 300/305, 540, 630(S), 730(S) +- SiS 315 series: SiS 315/H/PRO, 55x, (M)65x, 740, (M)661(F/M)X, (M)741(GX) +- SiS 330 series: SiS 330 ("Xabre"), (M)760 + + +Why do I need a framebuffer driver? +=================================== + +sisfb is eg. useful if you want a high-resolution text console. Besides that, +sisfb is required to run DirectFB (which comes with an additional, dedicated +driver for the 315 series). + +On the 300 series, sisfb on kernels older than 2.6.3 furthermore plays an +important role in connection with DRM/DRI: Sisfb manages the memory heap +used by DRM/DRI for 3D texture and other data. This memory management is +required for using DRI/DRM. + +Kernels >= around 2.6.3 do not need sisfb any longer for DRI/DRM memory +management. The SiS DRM driver has been updated and features a memory manager +of its own (which will be used if sisfb is not compiled). So unless you want +a graphical console, you don't need sisfb on kernels >=2.6.3. + +Sidenote: Since this seems to be a commonly made mistake: sisfb and vesafb +cannot be active at the same time! Do only select one of them in your kernel +configuration. + + +How are parameters passed to sisfb? +=================================== + +Well, it depends: If compiled statically into the kernel, use lilo's append +statement to add the parameters to the kernel command line. Please see lilo's +(or GRUB's) documentation for more information. If sisfb is a kernel module, +parameters are given with the modprobe (or insmod) command. + +Example for sisfb as part of the static kernel: Add the following line to your +lilo.conf: + + append="video=sisfb:mode:1024x768x16,mem:12288,rate:75" + +Example for sisfb as a module: Start sisfb by typing + + modprobe sisfb mode=1024x768x16 rate=75 mem=12288 + +A common mistake is that folks use a wrong parameter format when using the +driver compiled into the kernel. Please note: If compiled into the kernel, +the parameter format is video=sisfb:mode:none or video=sisfb:mode:1024x768x16 +(or whatever mode you want to use, alternatively using any other format +described above or the vesa keyword instead of mode). If compiled as a module, +the parameter format reads mode=none or mode=1024x768x16 (or whatever mode you +want to use). Using a "=" for a ":" (and vice versa) is a huge difference! +Additionally: If you give more than one argument to the in-kernel sisfb, the +arguments are separated with ",". For example: + + video=sisfb:mode:1024x768x16,rate:75,mem:12288 + + +How do I use it? +================ + +Preface statement: This file only covers very little of the driver's +capabilities and features. Please refer to the author's and maintainer's +website at http://www.winischhofer.net/linuxsisvga.shtml for more +information. Additionally, "modinfo sisfb" gives an overview over all +supported options including some explanation. + +The desired display mode can be specified using the keyword "mode" with +a parameter in one of the following formats: + - XxYxDepth or + - XxY-Depth or + - XxY-Depth@Rate or + - XxY + - or simply use the VESA mode number in hexadecimal or decimal. + +For example: 1024x768x16, 1024x768-16@75, 1280x1024-16. If no depth is +specified, it defaults to 8. If no rate is given, it defaults to 60Hz. Depth 32 +means 24bit color depth (but 32 bit framebuffer depth, which is not relevant +to the user). + +Additionally, sisfb understands the keyword "vesa" followed by a VESA mode +number in decimal or hexadecimal. For example: vesa=791 or vesa=0x117. Please +use either "mode" or "vesa" but not both. + +Linux 2.4 only: If no mode is given, sisfb defaults to "no mode" (mode=none) if +compiled as a module; if sisfb is statically compiled into the kernel, it +defaults to 800x600x8 unless CRT2 type is LCD, in which case the LCD's native +resolution is used. If you want to switch to a different mode, use the fbset +shell command. + +Linux 2.6 only: If no mode is given, sisfb defaults to 800x600x8 unless CRT2 +type is LCD, in which case it defaults to the LCD's native resolution. If +you want to switch to another mode, use the stty shell command. + +You should compile in both vgacon (to boot if you remove you SiS card from +your system) and sisfb (for graphics mode). Under Linux 2.6, also "Framebuffer +console support" (fbcon) is needed for a graphical console. + +You should *not* compile-in vesafb. And please do not use the "vga=" keyword +in lilo's or grub's configuration file; mode selection is done using the +"mode" or "vesa" keywords as a parameter. See above and below. + + +X11 +=== + +If using XFree86 or X.org, it is recommended that you don't use the "fbdev" +driver but the dedicated "sis" X driver. The "sis" X driver and sisfb are +developed by the same person (Thomas Winischhofer) and cooperate well with +each other. + + +SVGALib +======= + +SVGALib, if directly accessing the hardware, never restores the screen +correctly, especially on laptops or if the output devices are LCD or TV. +Therefore, use the chipset "FBDEV" in SVGALib configuration. This will make +SVGALib use the framebuffer device for mode switches and restoration. + + +Configuration +============= + +(Some) accepted options: + +off - Disable sisfb. This option is only understood if sisfb is + in-kernel, not a module. +mem:X - size of memory for the console, rest will be used for DRI/DRM. X + is in kilobytes. On 300 series, the default is 4096, 8192 or + 16384 (each in kilobyte) depending on how much video ram the card + has. On 315/330 series, the default is the maximum available ram + (since DRI/DRM is not supported for these chipsets). +noaccel - do not use 2D acceleration engine. (Default: use acceleration) +noypan - disable y-panning and scroll by redrawing the entire screen. + This is much slower than y-panning. (Default: use y-panning) +vesa:X - selects startup videomode. X is number from 0 to 0x1FF and + represents the VESA mode number (can be given in decimal or + hexadecimal form, the latter prefixed with "0x"). +mode:X - selects startup videomode. Please see above for the format of + "X". + +Boolean options such as "noaccel" or "noypan" are to be given without a +parameter if sisfb is in-kernel (for example "video=sisfb:noypan). If +sisfb is a module, these are to be set to 1 (for example "modprobe sisfb +noypan=1"). + +-- +Thomas Winischhofer <thomas@winischhofer.net> +May 27, 2004 + + diff --git a/Documentation/fb/sstfb.txt b/Documentation/fb/sstfb.txt new file mode 100644 index 0000000..550ca77 --- /dev/null +++ b/Documentation/fb/sstfb.txt @@ -0,0 +1,174 @@ + +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 useable + (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 diff --git a/Documentation/fb/tgafb.txt b/Documentation/fb/tgafb.txt new file mode 100644 index 0000000..250083a --- /dev/null +++ b/Documentation/fb/tgafb.txt @@ -0,0 +1,69 @@ +$Id: tgafb.txt,v 1.1.2.2 2000/04/04 06:50:18 mato Exp $ + +What is tgafb? +=============== + +This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA +cards, which are usually found in older Digital Alpha systems. The +following models are supported: + +ZLxP-E1 (8bpp, 2 MB VRAM) +ZLxP-E2 (32bpp, 8 MB VRAM) +ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer) + +This version is an almost complete rewrite of the code written by Geert +Uytterhoeven, which was based on the original TGA console code written by +Jay Estabrook. + +Major new features since Linux 2.0.x: + + * Support for multiple resolutions + * Support for fixed-frequency and other oddball monitors + (by allowing the video mode to be set at boot time) + +User-visible changes since Linux 2.2.x: + + * Sync-on-green is now handled properly + * More useful information is printed on bootup + (this helps if people run into problems) + +This driver does not (yet) support the TGA2 family of framebuffers, so the +PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These +can however be used with the standard VGA Text Console driver. + + +Configuration +============= + +You can pass kernel command line options to tgafb with +`video=tgafb:option1,option2:value2,option3' (multiple options should be +separated by comma, values are separated from options by `:'). +Accepted options: + +font:X - default font to use. All fonts are supported, including the + SUN12x22 font which is very nice at high resolutions. + +mode:X - default video mode. The following video modes are supported: + 640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72, + 1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76, + 1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70, + 1152x864-84, 1280x1024-76, 1280x1024-85 + + +Known Issues +============ + +The XFree86 FBDev server has been reported not to work, since tgafb doesn't do +mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for +me, however this server does not do acceleration, which make certain operations +quite slow. Support for acceleration is being progressively integrated in +XFree86 4.x. + +When running tgafb in resolutions higher than 640x480, on switching VCs from +tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually +refreshed. This is an X server problem, not a tgafb problem, and is fixed in +XFree86 4.0. + +Enjoy! + +Martin Lucina <mato@kotelna.sk> diff --git a/Documentation/fb/tridentfb.txt b/Documentation/fb/tridentfb.txt new file mode 100644 index 0000000..45d9de5 --- /dev/null +++ b/Documentation/fb/tridentfb.txt @@ -0,0 +1,70 @@ +Tridentfb is a framebuffer driver for some Trident chip based cards. + +The following list of chips is thought to be supported although not all are +tested: + +those from the TGUI series 9440/96XX and with Cyber in their names +those from the Image series and with Cyber in their names +those with Blade in their names (Blade3D,CyberBlade...) +the newer CyberBladeXP family + +All families are accelerated. Only PCI/AGP based cards are supported, +none of the older Tridents. +The driver supports 8, 16 and 32 bits per pixel depths. +The TGUI family requires a line length to be power of 2 if acceleration +is enabled. This means that range of possible resolutions and bpp is +limited comparing to the range if acceleration is disabled (see list +of parameters below). + +Known bugs: +1. The driver randomly locks up on 3DImage975 chip with acceleration + enabled. The same happens in X11 (Xorg). +2. The ramdac speeds require some more fine tuning. It is possible to + switch resolution which the chip does not support at some depths for + older chips. + +How to use it? +============== + +When booting you can pass the video parameter. +video=tridentfb + +The parameters for tridentfb are concatenated with a ':' as in this example. + +video=tridentfb:800x600-16@75,noaccel + +The second level parameters that tridentfb understands are: + +noaccel - turns off acceleration (when it doesn't work for your card) + +fp - use flat panel related stuff +crt - assume monitor is present instead of fp + +center - for flat panels and resolutions smaller than native size center the + image, otherwise use +stretch + +memsize - integer value in KB, use if your card's memory size is misdetected. + look at the driver output to see what it says when initializing. + +memdiff - integer value in KB, should be nonzero if your card reports + more memory than it actually has. For instance mine is 192K less than + detection says in all three BIOS selectable situations 2M, 4M, 8M. + Only use if your video memory is taken from main memory hence of + configurable size. Otherwise use memsize. + If in some modes which barely fit the memory you see garbage + at the bottom this might help by not letting change to that mode + anymore. + +nativex - the width in pixels of the flat panel.If you know it (usually 1024 + 800 or 1280) and it is not what the driver seems to detect use it. + +bpp - bits per pixel (8,16 or 32) +mode - a mode name like 800x600-8@75 as described in + Documentation/fb/modedb.txt + +Using insane values for the above parameters will probably result in driver +misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or +nativex=93) + +Contact: jani@astechnix.ro diff --git a/Documentation/fb/uvesafb.txt b/Documentation/fb/uvesafb.txt new file mode 100644 index 0000000..7ac3c40 --- /dev/null +++ b/Documentation/fb/uvesafb.txt @@ -0,0 +1,188 @@ + +uvesafb - A Generic Driver for VBE2+ compliant video cards +========================================================== + +1. Requirements +--------------- + +uvesafb should work with any video card that has a Video BIOS compliant +with the VBE 2.0 standard. + +Unlike other drivers, uvesafb makes use of a userspace helper called +v86d. v86d is used to run the x86 Video BIOS code in a simulated and +controlled environment. This allows uvesafb to function on arches other +than x86. Check the v86d documentation for a list of currently supported +arches. + +v86d source code can be downloaded from the following website: + http://dev.gentoo.org/~spock/projects/uvesafb + +Please refer to the v86d documentation for detailed configuration and +installation instructions. + +Note that the v86d userspace helper has to be available at all times in +order for uvesafb to work properly. If you want to use uvesafb during +early boot, you will have to include v86d into an initramfs image, and +either compile it into the kernel or use it as an initrd. + +2. Caveats and limitations +-------------------------- + +uvesafb is a _generic_ driver which supports a wide variety of video +cards, but which is ultimately limited by the Video BIOS interface. +The most important limitations are: + +- Lack of any type of acceleration. +- A strict and limited set of supported video modes. Often the native + or most optimal resolution/refresh rate for your setup will not work + with uvesafb, simply because the Video BIOS doesn't support the + video mode you want to use. This can be especially painful with + widescreen panels, where native video modes don't have the 4:3 aspect + ratio, which is what most BIOS-es are limited to. +- Adjusting the refresh rate is only possible with a VBE 3.0 compliant + Video BIOS. Note that many nVidia Video BIOS-es claim to be VBE 3.0 + compliant, while they simply ignore any refresh rate settings. + +3. Configuration +---------------- + +uvesafb can be compiled either as a module, or directly into the kernel. +In both cases it supports the same set of configuration options, which +are either given on the kernel command line or as module parameters, e.g.: + + video=uvesafb:1024x768-32,mtrr:3,ywrap (compiled into the kernel) + + # modprobe uvesafb mode_option=1024x768-32 mtrr=3 scroll=ywrap (module) + +Accepted options: + +ypan Enable display panning using the VESA protected mode + interface. The visible screen is just a window of the + video memory, console scrolling is done by changing the + start of the window. Available on x86 only. + +ywrap Same as ypan, but assumes your gfx board can wrap-around + the video memory (i.e. starts reading from top if it + reaches the end of video memory). Faster than ypan. + Available on x86 only. + +redraw Scroll by redrawing the affected part of the screen, this + is the safe (and slow) default. + +(If you're using uvesafb as a module, the above three options are + used a parameter of the scroll option, e.g. scroll=ypan.) + +vgapal Use the standard VGA registers for palette changes. + +pmipal Use the protected mode interface for palette changes. + This is the default if the protected mode interface is + available. Available on x86 only. + +mtrr:n Setup memory type range registers for the framebuffer + where n: + 0 - disabled (equivalent to nomtrr) (default) + 1 - uncachable + 2 - write-back + 3 - write-combining + 4 - write-through + + If you see the following in dmesg, choose the type that matches + the old one. In this example, use "mtrr:2". +... +mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining +... + +nomtrr Do not use memory type range registers. + +vremap:n + Remap 'n' MiB of video RAM. If 0 or not specified, remap memory + according to video mode. + +vtotal:n + If the video BIOS of your card incorrectly determines the total + amount of video RAM, use this option to override the BIOS (in MiB). + +<mode> The mode you want to set, in the standard modedb format. Refer to + modedb.txt for a detailed description. When uvesafb is compiled as + a module, the mode string should be provided as a value of the + 'mode_option' option. + +vbemode:x + Force the use of VBE mode x. The mode will only be set if it's + found in the VBE-provided list of supported modes. + NOTE: The mode number 'x' should be specified in VESA mode number + notation, not the Linux kernel one (eg. 257 instead of 769). + HINT: If you use this option because normal <mode> parameter does + not work for you and you use a X server, you'll probably want to + set the 'nocrtc' option to ensure that the video mode is properly + restored after console <-> X switches. + +nocrtc Do not use CRTC timings while setting the video mode. This option + has any effect only if the Video BIOS is VBE 3.0 compliant. Use it + if you have problems with modes set the standard way. Note that + using this option implies that any refresh rate adjustments will + be ignored and the refresh rate will stay at your BIOS default (60 Hz). + +noedid Do not try to fetch and use EDID-provided modes. + +noblank Disable hardware blanking. + +v86d:path + Set path to the v86d executable. This option is only available as + a module parameter, and not as a part of the video= string. If you + need to use it and have uvesafb built into the kernel, use + uvesafb.v86d="path". + +Additionally, the following parameters may be provided. They all override the +EDID-provided values and BIOS defaults. Refer to your monitor's specs to get +the correct values for maxhf, maxvf and maxclk for your hardware. + +maxhf:n Maximum horizontal frequency (in kHz). +maxvf:n Maximum vertical frequency (in Hz). +maxclk:n Maximum pixel clock (in MHz). + +4. The sysfs interface +---------------------- + +uvesafb provides several sysfs nodes for configurable parameters and +additional information. + +Driver attributes: + +/sys/bus/platform/drivers/uvesafb + - v86d (default: /sbin/v86d) + Path to the v86d executable. v86d is started by uvesafb + if an instance of the daemon isn't already running. + +Device attributes: + +/sys/bus/platform/drivers/uvesafb/uvesafb.0 + - nocrtc + Use the default refresh rate (60 Hz) if set to 1. + + - oem_product_name + - oem_product_rev + - oem_string + - oem_vendor + Information about the card and its maker. + + - vbe_modes + A list of video modes supported by the Video BIOS along with their + VBE mode numbers in hex. + + - vbe_version + A BCD value indicating the implemented VBE standard. + +5. Miscellaneous +---------------- + +Uvesafb will set a video mode with the default refresh rate and timings +from the Video BIOS if you set pixclock to 0 in fb_var_screeninfo. + + +-- + Michal Januszewski <spock@gentoo.org> + Last updated: 2007-06-16 + + Documentation of the uvesafb options is loosely based on vesafb.txt. + diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt new file mode 100644 index 0000000..ee277dd --- /dev/null +++ b/Documentation/fb/vesafb.txt @@ -0,0 +1,181 @@ + +What is vesafb? +=============== + +This is a generic driver for a graphic framebuffer on intel boxes. + +The idea is simple: Turn on graphics mode at boot time with the help +of the BIOS, and use this as framebuffer device /dev/fb0, like the m68k +(and other) ports do. + +This means we decide at boot time whenever we want to run in text or +graphics mode. Switching mode later on (in protected mode) is +impossible; BIOS calls work in real mode only. VESA BIOS Extensions +Version 2.0 are required, because we need a linear frame buffer. + +Advantages: + + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts. + * You can run XF68_FBDev on top of /dev/fb0 (=> non-accelerated X11 + support for every VBE 2.0 compliant graphics board). + * Most important: boot logo :-) + +Disadvantages: + + * graphic mode is slower than text mode... + + +How to use it? +============== + +Switching modes is done using the vga=... boot parameter. Read +Documentation/svga.txt for details. + +You should compile in both vgacon (for text mode) and vesafb (for +graphics mode). Which of them takes over the console depends on +whenever the specified mode is text or graphics. + +The graphic modes are NOT in the list which you get if you boot with +vga=ask and hit return. The mode you wish to use is derived from the +VESA mode number. Here are those VESA mode numbers: + + | 640x480 800x600 1024x768 1280x1024 +----+------------------------------------- +256 | 0x101 0x103 0x105 0x107 +32k | 0x110 0x113 0x116 0x119 +64k | 0x111 0x114 0x117 0x11A +16M | 0x112 0x115 0x118 0x11B + +The video mode number of the Linux kernel is the VESA mode number plus +0x200. + + Linux_kernel_mode_number = VESA_mode_number + 0x200 + +So the table for the Kernel mode numbers are: + + | 640x480 800x600 1024x768 1280x1024 +----+------------------------------------- +256 | 0x301 0x303 0x305 0x307 +32k | 0x310 0x313 0x316 0x319 +64k | 0x311 0x314 0x317 0x31A +16M | 0x312 0x315 0x318 0x31B + +To enable one of those modes you have to specify "vga=ask" in the +lilo.conf file and rerun LILO. Then you can type in the desired +mode at the "vga=ask" prompt. For example if you like to use +1024x768x256 colors you have to say "305" at this prompt. + +If this does not work, this might be because your BIOS does not support +linear framebuffers or because it does not support this mode at all. +Even if your board does, it might be the BIOS which does not. VESA BIOS +Extensions v2.0 are required, 1.2 is NOT sufficient. You will get a +"bad mode number" message if something goes wrong. + +1. Note: LILO cannot handle hex, for booting directly with + "vga=mode-number" you have to transform the numbers to decimal. +2. Note: Some newer versions of LILO appear to work with those hex values, + if you set the 0x in front of the numbers. + +X11 +=== + +XF68_FBDev should work just fine, but it is non-accelerated. Running +another (accelerated) X-Server like XF86_SVGA might or might not work. +It depends on X-Server and graphics board. + +The X-Server must restore the video mode correctly, else you end up +with a broken console (and vesafb cannot do anything about this). + + +Refresh rates +============= + +There is no way to change the vesafb video mode and/or timings after +booting linux. If you are not happy with the 60 Hz refresh rate, you +have these options: + + * configure and load the DOS-Tools for your the graphics board (if + available) and boot linux with loadlin. + * use a native driver (matroxfb/atyfb) instead if vesafb. If none + is available, write a new one! + * VBE 3.0 might work too. I have neither a gfx board with VBE 3.0 + support nor the specs, so I have not checked this yet. + + +Configuration +============= + +The VESA BIOS provides protected mode interface for changing +some parameters. vesafb can use it for palette changes and +to pan the display. It is turned off by default because it +seems not to work with some BIOS versions, but there are options +to turn it on. + +You can pass options to vesafb using "video=vesafb:option" on +the kernel command line. Multiple options should be separated +by comma, like this: "video=vesafb:ypan,invers" + +Accepted options: + +invers no comment... + +ypan enable display panning using the VESA protected mode + interface. The visible screen is just a window of the + video memory, console scrolling is done by changing the + start of the window. + pro: * scrolling (fullscreen) is fast, because there is + no need to copy around data. + * You'll get scrollback (the Shift-PgUp thing), + the video memory can be used as scrollback buffer + kontra: * scrolling only parts of the screen causes some + ugly flicker effects (boot logo flickers for + example). + +ywrap Same as ypan, but assumes your gfx board can wrap-around + the video memory (i.e. starts reading from top if it + reaches the end of video memory). Faster than ypan. + +redraw scroll by redrawing the affected part of the screen, this + is the safe (and slow) default. + + +vgapal Use the standard vga registers for palette changes. + This is the default. +pmipal Use the protected mode interface for palette changes. + +mtrr:n setup memory type range registers for the vesafb framebuffer + where n: + 0 - disabled (equivalent to nomtrr) (default) + 1 - uncachable + 2 - write-back + 3 - write-combining + 4 - write-through + + If you see the following in dmesg, choose the type that matches the + old one. In this example, use "mtrr:2". +... +mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining +... + +nomtrr disable mtrr + +vremap:n + remap 'n' MiB of video RAM. If 0 or not specified, remap memory + according to video mode. (2.5.66 patch/idea by Antonino Daplas + reversed to give override possibility (allocate more fb memory + than the kernel would) to 2.4 by tmb@iki.fi) + +vtotal:n + if the video BIOS of your card incorrectly determines the total + amount of video RAM, use this option to override the BIOS (in MiB). + +Have fun! + + Gerd + +-- +Gerd Knorr <kraxel@goldbach.in-berlin.de> + +Minor (mostly typo) changes +by Nico Schmoigl <schmoigl@rumms.uni-mannheim.de> diff --git a/Documentation/fb/viafb.modes b/Documentation/fb/viafb.modes new file mode 100644 index 0000000..02e5b48 --- /dev/null +++ b/Documentation/fb/viafb.modes @@ -0,0 +1,870 @@ +# +# +# These data are based on the CRTC parameters in +# +# VIA Integration Graphics Chip +# (C) 2004 VIA Technologies Inc. +# + +# +# 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) +# +# Horizontal Vertical +# Resolution 640 480 +# Scan Frequency 31.469 kHz 59.94 Hz +# Sync Width 3.813 us 0.064 ms +# 12 chars 2 lines +# Front Porch 0.636 us 0.318 ms +# 2 chars 10 lines +# Back Porch 1.907 us 1.048 ms +# 6 chars 33 lines +# Active Time 25.422 us 15.253 ms +# 80 chars 480 lines +# Blank Time 6.356 us 1.430 ms +# 20 chars 45 lines +# Polarity negative negative +# + +mode "640x480-60" +# D: 25.175 MHz, H: 31.469 kHz, V: 59.94 Hz + geometry 640 480 640 480 32 + timings 39722 48 16 33 10 96 2 endmode mode "480x640-60" +# D: 24.823 MHz, H: 39.780 kHz, V: 60.00 Hz + geometry 480 640 480 640 32 timings 39722 72 24 19 1 48 3 endmode +# +# 640x480, 75 Hz, Non-Interlaced (31.50 MHz dotclock) +# +# Horizontal Vertical +# Resolution 640 480 +# Scan Frequency 37.500 kHz 75.00 Hz +# Sync Width 2.032 us 0.080 ms +# 8 chars 3 lines +# Front Porch 0.508 us 0.027 ms +# 2 chars 1 lines +# Back Porch 3.810 us 0.427 ms +# 15 chars 16 lines +# Active Time 20.317 us 12.800 ms +# 80 chars 480 lines +# Blank Time 6.349 us 0.533 ms +# 25 chars 20 lines +# Polarity negative negative +# + mode "640x480-75" +# D: 31.50 MHz, H: 37.500 kHz, V: 75.00 Hz + geometry 640 480 640 480 32 timings 31747 120 16 16 1 64 3 endmode +# +# 640x480, 85 Hz, Non-Interlaced (36.000 MHz dotclock) +# +# Horizontal Vertical +# Resolution 640 480 +# Scan Frequency 43.269 kHz 85.00 Hz +# Sync Width 1.556 us 0.069 ms +# 7 chars 3 lines +# Front Porch 1.556 us 0.023 ms +# 7 chars 1 lines +# Back Porch 2.222 us 0.578 ms +# 10 chars 25 lines +# Active Time 17.778 us 11.093 ms +# 80 chars 480 lines +# Blank Time 5.333 us 0.670 ms +# 24 chars 29 lines +# Polarity negative negative +# + mode "640x480-85" +# D: 36.000 MHz, H: 43.269 kHz, V: 85.00 Hz + geometry 640 480 640 480 32 timings 27777 80 56 25 1 56 3 endmode +# +# 640x480, 100 Hz, Non-Interlaced (43.163 MHz dotclock) +# +# Horizontal Vertical +# Resolution 640 480 +# Scan Frequency 50.900 kHz 100.00 Hz +# Sync Width 1.483 us 0.058 ms +# 8 chars 3 lines +# Front Porch 0.927 us 0.019 ms +# 5 chars 1 lines +# Back Porch 2.409 us 0.475 ms +# 13 chars 25 lines +# Active Time 14.827 us 9.430 ms +# 80 chars 480 lines +# Blank Time 4.819 us 0.570 ms +# 26 chars 29 lines +# Polarity positive positive +# + mode "640x480-100" +# D: 43.163 MHz, H: 50.900 kHz, V: 100.00 Hz + geometry 640 480 640 480 32 timings 23168 104 40 25 1 64 3 endmode +# +# 640x480, 120 Hz, Non-Interlaced (52.406 MHz dotclock) +# +# Horizontal Vertical +# Resolution 640 480 +# Scan Frequency 61.800 kHz 120.00 Hz +# Sync Width 1.221 us 0.048 ms +# 8 chars 3 lines +# Front Porch 0.763 us 0.016 ms +# 5 chars 1 lines +# Back Porch 1.984 us 0.496 ms +# 13 chars 31 lines +# Active Time 12.212 us 7.767 ms +# 80 chars 480 lines +# Blank Time 3.969 us 0.566 ms +# 26 chars 35 lines +# Polarity positive positive +# + mode "640x480-120" +# D: 52.406 MHz, H: 61.800 kHz, V: 120.00 Hz + geometry 640 480 640 480 32 timings 19081 104 40 31 1 64 3 endmode +# +# 720x480, 60 Hz, Non-Interlaced (26.880 MHz dotclock) +# +# Horizontal Vertical +# Resolution 720 480 +# Scan Frequency 30.000 kHz 60.241 Hz +# Sync Width 2.679 us 0.099 ms +# 9 chars 3 lines +# Front Porch 0.595 us 0.033 ms +# 2 chars 1 lines +# Back Porch 3.274 us 0.462 ms +# 11 chars 14 lines +# Active Time 26.786 us 16.000 ms +# 90 chars 480 lines +# Blank Time 6.548 us 0.600 ms +# 22 chars 18 lines +# Polarity positive positive +# + mode "720x480-60" +# D: 26.880 MHz, H: 30.000 kHz, V: 60.24 Hz + geometry 720 480 720 480 32 timings 37202 88 16 14 1 72 3 endmode +# +# 800x480, 60 Hz, Non-Interlaced (29.581 MHz dotclock) +# +# Horizontal Vertical +# Resolution 800 480 +# Scan Frequency 29.892 kHz 60.00 Hz +# Sync Width 2.704 us 100.604 us +# 10 chars 3 lines +# Front Porch 0.541 us 33.535 us +# 2 chars 1 lines +# Back Porch 3.245 us 435.949 us +# 12 chars 13 lines +# Active Time 27.044 us 16.097 ms +# 100 chars 480 lines +# Blank Time 6.491 us 0.570 ms +# 24 chars 17 lines +# Polarity positive positive +# + mode "800x480-60" +# D: 29.500 MHz, H: 29.738 kHz, V: 60.00 Hz + geometry 800 480 800 480 32 timings 33805 96 24 10 3 72 7 endmode +# +# 720x576, 60 Hz, Non-Interlaced (32.668 MHz dotclock) +# +# Horizontal Vertical +# Resolution 720 576 +# Scan Frequency 35.820 kHz 60.00 Hz +# Sync Width 2.204 us 0.083 ms +# 9 chars 3 lines +# Front Porch 0.735 us 0.027 ms +# 3 chars 1 lines +# Back Porch 2.939 us 0.459 ms +# 12 chars 17 lines +# Active Time 22.040 us 16.080 ms +# 90 chars 476 lines +# Blank Time 5.877 us 0.586 ms +# 24 chars 21 lines +# Polarity positive positive +# + mode "720x576-60" +# D: 32.668 MHz, H: 35.820 kHz, V: 60.00 Hz + geometry 720 576 720 576 32 timings 30611 96 24 17 1 72 3 endmode +# +# 800x600, 60 Hz, Non-Interlaced (40.00 MHz dotclock) +# +# Horizontal Vertical +# Resolution 800 600 +# Scan Frequency 37.879 kHz 60.32 Hz +# Sync Width 3.200 us 0.106 ms +# 16 chars 4 lines +# Front Porch 1.000 us 0.026 ms +# 5 chars 1 lines +# Back Porch 2.200 us 0.607 ms +# 11 chars 23 lines +# Active Time 20.000 us 15.840 ms +# 100 chars 600 lines +# Blank Time 6.400 us 0.739 ms +# 32 chars 28 lines +# Polarity positive positive +# + mode "800x600-60" +# D: 40.00 MHz, H: 37.879 kHz, V: 60.32 Hz + geometry 800 600 800 600 32 + timings 25000 88 40 23 1 128 4 hsync high vsync high endmode +# +# 800x600, 75 Hz, Non-Interlaced (49.50 MHz dotclock) +# +# Horizontal Vertical +# Resolution 800 600 +# Scan Frequency 46.875 kHz 75.00 Hz +# Sync Width 1.616 us 0.064 ms +# 10 chars 3 lines +# Front Porch 0.323 us 0.021 ms +# 2 chars 1 lines +# Back Porch 3.232 us 0.448 ms +# 20 chars 21 lines +# Active Time 16.162 us 12.800 ms +# 100 chars 600 lines +# Blank Time 5.172 us 0.533 ms +# 32 chars 25 lines +# Polarity positive positive +# + mode "800x600-75" +# D: 49.50 MHz, H: 46.875 kHz, V: 75.00 Hz + geometry 800 600 800 600 32 + timings 20203 160 16 21 1 80 3 hsync high vsync high endmode +# +# 800x600, 85 Hz, Non-Interlaced (56.25 MHz dotclock) +# +# Horizontal Vertical +# Resolution 800 600 +# Scan Frequency 53.674 kHz 85.061 Hz +# Sync Width 1.138 us 0.056 ms +# 8 chars 3 lines +# Front Porch 0.569 us 0.019 ms +# 4 chars 1 lines +# Back Porch 2.702 us 0.503 ms +# 19 chars 27 lines +# Active Time 14.222 us 11.179 ms +# 100 chars 600 lines +# Blank Time 4.409 us 0.578 ms +# 31 chars 31 lines +# Polarity positive positive +# + mode "800x600-85" +# D: 56.25 MHz, H: 53.674 kHz, V: 85.061 Hz + geometry 800 600 800 600 32 + timings 17777 152 32 27 1 64 3 hsync high vsync high endmode +# +# 800x600, 100 Hz, Non-Interlaced (67.50 MHz dotclock) +# +# Horizontal Vertical +# Resolution 800 600 +# Scan Frequency 62.500 kHz 100.00 Hz +# Sync Width 0.948 us 0.064 ms +# 8 chars 4 lines +# Front Porch 0.000 us 0.112 ms +# 0 chars 7 lines +# Back Porch 3.200 us 0.224 ms +# 27 chars 14 lines +# Active Time 11.852 us 9.600 ms +# 100 chars 600 lines +# Blank Time 4.148 us 0.400 ms +# 35 chars 25 lines +# Polarity positive positive +# + mode "800x600-100" +# D: 67.50 MHz, H: 62.500 kHz, V: 100.00 Hz + geometry 800 600 800 600 32 + timings 14667 216 0 14 7 64 4 hsync high vsync high endmode +# +# 800x600, 120 Hz, Non-Interlaced (83.950 MHz dotclock) +# +# Horizontal Vertical +# Resolution 800 600 +# Scan Frequency 77.160 kHz 120.00 Hz +# Sync Width 1.048 us 0.039 ms +# 11 chars 3 lines +# Front Porch 0.667 us 0.013 ms +# 7 chars 1 lines +# Back Porch 1.715 us 0.507 ms +# 18 chars 39 lines +# Active Time 9.529 us 7.776 ms +# 100 chars 600 lines +# Blank Time 3.431 us 0.557 ms +# 36 chars 43 lines +# Polarity positive positive +# + mode "800x600-120" +# D: 83.950 MHz, H: 77.160 kHz, V: 120.00 Hz + geometry 800 600 800 600 32 + timings 11912 144 56 39 1 88 3 hsync high vsync high endmode +# +# 848x480, 60 Hz, Non-Interlaced (31.490 MHz dotclock) +# +# Horizontal Vertical +# Resolution 848 480 +# Scan Frequency 29.820 kHz 60.00 Hz +# Sync Width 2.795 us 0.099 ms +# 11 chars 3 lines +# Front Porch 0.508 us 0.033 ms +# 2 chars 1 lines +# Back Porch 3.303 us 0.429 ms +# 13 chars 13 lines +# Active Time 26.929 us 16.097 ms +# 106 chars 480 lines +# Blank Time 6.605 us 0.570 ms +# 26 chars 17 lines +# Polarity positive positive +# + mode "848x480-60" +# D: 31.500 MHz, H: 29.830 kHz, V: 60.00 Hz + geometry 848 480 848 480 32 + timings 31746 104 24 12 3 80 5 hsync high vsync high endmode +# +# 856x480, 60 Hz, Non-Interlaced (31.728 MHz dotclock) +# +# Horizontal Vertical +# Resolution 856 480 +# Scan Frequency 29.820 kHz 60.00 Hz +# Sync Width 2.774 us 0.099 ms +# 11 chars 3 lines +# Front Porch 0.504 us 0.033 ms +# 2 chars 1 lines +# Back Porch 3.728 us 0.429 ms +# 13 chars 13 lines +# Active Time 26.979 us 16.097 ms +# 107 chars 480 lines +# Blank Time 6.556 us 0.570 ms +# 26 chars 17 lines +# Polarity positive positive +# + mode "856x480-60" +# D: 31.728 MHz, H: 29.820 kHz, V: 60.00 Hz + geometry 856 480 856 480 32 + timings 31518 104 16 13 1 88 3 + hsync high vsync high endmode mode "960x600-60" +# D: 45.250 MHz, H: 37.212 kHz, V: 60.00 Hz + geometry 960 600 960 600 32 timings 22099 128 32 15 3 96 6 endmode +# +# 1000x600, 60 Hz, Non-Interlaced (48.068 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1000 600 +# Scan Frequency 37.320 kHz 60.00 Hz +# Sync Width 2.164 us 0.080 ms +# 13 chars 3 lines +# Front Porch 0.832 us 0.027 ms +# 5 chars 1 lines +# Back Porch 2.996 us 0.483 ms +# 18 chars 18 lines +# Active Time 20.804 us 16.077 ms +# 125 chars 600 lines +# Blank Time 5.991 us 0.589 ms +# 36 chars 22 lines +# Polarity negative positive +# + mode "1000x600-60" +# D: 48.068 MHz, H: 37.320 kHz, V: 60.00 Hz + geometry 1000 600 1000 600 32 + timings 20834 144 40 18 1 104 3 endmode mode "1024x576-60" +# D: 46.996 MHz, H: 35.820 kHz, V: 60.00 Hz + geometry 1024 576 1024 576 32 + timings 21278 144 40 17 1 104 3 endmode mode "1024x600-60" +# D: 48.964 MHz, H: 37.320 kHz, V: 60.00 Hz + geometry 1024 600 1024 600 32 + timings 20461 144 40 18 1 104 3 endmode mode "1088x612-60" +# D: 52.952 MHz, H: 38.040 kHz, V: 60.00 Hz + geometry 1088 612 1088 612 32 timings 18877 152 48 16 3 104 5 endmode +# +# 1024x512, 60 Hz, Non-Interlaced (41.291 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1024 512 +# Scan Frequency 31.860 kHz 60.00 Hz +# Sync Width 2.519 us 0.094 ms +# 13 chars 3 lines +# Front Porch 0.775 us 0.031 ms +# 4 chars 1 lines +# Back Porch 3.294 us 0.465 ms +# 17 chars 15 lines +# Active Time 24.800 us 16.070 ms +# 128 chars 512 lines +# Blank Time 6.587 us 0.596 ms +# 34 chars 19 lines +# Polarity positive positive +# + mode "1024x512-60" +# D: 41.291 MHz, H: 31.860 kHz, V: 60.00 Hz + geometry 1024 512 1024 512 32 + timings 24218 126 32 15 1 104 3 hsync high vsync high endmode +# +# 1024x600, 60 Hz, Non-Interlaced (48.875 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1024 768 +# Scan Frequency 37.252 kHz 60.00 Hz +# Sync Width 2.128 us 80.532us +# 13 chars 3 lines +# Front Porch 0.818 us 26.844 us +# 5 chars 1 lines +# Back Porch 2.946 us 483.192 us +# 18 chars 18 lines +# Active Time 20.951 us 16.697 ms +# 128 chars 622 lines +# Blank Time 5.893 us 0.591 ms +# 36 chars 22 lines +# Polarity negative positive +# +#mode "1024x600-60" +# # D: 48.875 MHz, H: 37.252 kHz, V: 60.00 Hz +# geometry 1024 600 1024 600 32 +# timings 20460 144 40 18 1 104 3 +# endmode +# +# 1024x768, 60 Hz, Non-Interlaced (65.00 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1024 768 +# Scan Frequency 48.363 kHz 60.00 Hz +# Sync Width 2.092 us 0.124 ms +# 17 chars 6 lines +# Front Porch 0.369 us 0.062 ms +# 3 chars 3 lines +# Back Porch 2.462 us 0.601 ms +# 20 chars 29 lines +# Active Time 15.754 us 15.880 ms +# 128 chars 768 lines +# Blank Time 4.923 us 0.786 ms +# 40 chars 38 lines +# Polarity negative negative +# + mode "1024x768-60" +# D: 65.00 MHz, H: 48.363 kHz, V: 60.00 Hz + geometry 1024 768 1024 768 32 timings 15385 160 24 29 3 136 6 endmode +# +# 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1024 768 +# Scan Frequency 60.023 kHz 75.03 Hz +# Sync Width 1.219 us 0.050 ms +# 12 chars 3 lines +# Front Porch 0.203 us 0.017 ms +# 2 chars 1 lines +# Back Porch 2.235 us 0.466 ms +# 22 chars 28 lines +# Active Time 13.003 us 12.795 ms +# 128 chars 768 lines +# Blank Time 3.657 us 0.533 ms +# 36 chars 32 lines +# Polarity positive positive +# + mode "1024x768-75" +# D: 78.75 MHz, H: 60.023 kHz, V: 75.03 Hz + geometry 1024 768 1024 768 32 + timings 12699 176 16 28 1 96 3 hsync high vsync high endmode +# +# 1024x768, 85 Hz, Non-Interlaced (94.50 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1024 768 +# Scan Frequency 68.677 kHz 85.00 Hz +# Sync Width 1.016 us 0.044 ms +# 12 chars 3 lines +# Front Porch 0.508 us 0.015 ms +# 6 chars 1 lines +# Back Porch 2.201 us 0.524 ms +# 26 chars 36 lines +# Active Time 10.836 us 11.183 ms +# 128 chars 768 lines +# Blank Time 3.725 us 0.582 ms +# 44 chars 40 lines +# Polarity positive positive +# + mode "1024x768-85" +# D: 94.50 MHz, H: 68.677 kHz, V: 85.00 Hz + geometry 1024 768 1024 768 32 + timings 10582 208 48 36 1 96 3 hsync high vsync high endmode +# +# 1024x768, 100 Hz, Non-Interlaced (110.0 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1024 768 +# Scan Frequency 79.023 kHz 99.78 Hz +# Sync Width 0.800 us 0.101 ms +# 11 chars 8 lines +# Front Porch 0.000 us 0.000 ms +# 0 chars 0 lines +# Back Porch 2.545 us 0.202 ms +# 35 chars 16 lines +# Active Time 9.309 us 9.719 ms +# 128 chars 768 lines +# Blank Time 3.345 us 0.304 ms +# 46 chars 24 lines +# Polarity negative negative +# + mode "1024x768-100" +# D: 113.3 MHz, H: 79.023 kHz, V: 99.78 Hz + geometry 1024 768 1024 768 32 + timings 8825 280 0 16 0 88 8 endmode mode "1152x720-60" +# D: 66.750 MHz, H: 44.859 kHz, V: 60.00 Hz + geometry 1152 720 1152 720 32 timings 14981 168 56 19 3 112 6 endmode +# +# 1152x864, 75 Hz, Non-Interlaced (110.0 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1152 864 +# Scan Frequency 75.137 kHz 74.99 Hz +# Sync Width 1.309 us 0.106 ms +# 18 chars 8 lines +# Front Porch 0.245 us 0.599 ms +# 3 chars 45 lines +# Back Porch 1.282 us 1.132 ms +# 18 chars 85 lines +# Active Time 10.473 us 11.499 ms +# 144 chars 864 lines +# Blank Time 2.836 us 1.837 ms +# 39 chars 138 lines +# Polarity positive positive +# + mode "1152x864-75" +# D: 110.0 MHz, H: 75.137 kHz, V: 74.99 Hz + geometry 1152 864 1152 864 32 + timings 9259 144 24 85 45 144 8 + hsync high vsync high endmode mode "1200x720-60" +# D: 70.184 MHz, H: 44.760 kHz, V: 60.00 Hz + geometry 1200 720 1200 720 32 + timings 14253 184 28 22 1 128 3 endmode mode "1280x600-60" +# D: 61.503 MHz, H: 37.320 kHz, V: 60.00 Hz + geometry 1280 600 1280 600 32 + timings 16260 184 28 18 1 128 3 endmode mode "1280x720-50" +# D: 60.466 MHz, H: 37.050 kHz, V: 50.00 Hz + geometry 1280 720 1280 720 32 + timings 16538 176 48 17 1 128 3 endmode mode "1280x768-50" +# D: 65.178 MHz, H: 39.550 kHz, V: 50.00 Hz + geometry 1280 768 1280 768 32 timings 15342 184 28 19 1 128 3 endmode +# +# 1280x768, 60 Hz, Non-Interlaced (80.136 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 768 +# Scan Frequency 47.700 kHz 60.00 Hz +# Sync Width 1.697 us 0.063 ms +# 17 chars 3 lines +# Front Porch 0.799 us 0.021 ms +# 8 chars 1 lines +# Back Porch 2.496 us 0.483 ms +# 25 chars 23 lines +# Active Time 15.973 us 16.101 ms +# 160 chars 768 lines +# Blank Time 4.992 us 0.566 ms +# 50 chars 27 lines +# Polarity positive positive +# + mode "1280x768-60" +# D: 80.13 MHz, H: 47.700 kHz, V: 60.00 Hz + geometry 1280 768 1280 768 32 + timings 12480 200 48 23 1 126 3 hsync high vsync high endmode +# +# 1280x800, 60 Hz, Non-Interlaced (83.375 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 800 +# Scan Frequency 49.628 kHz 60.00 Hz +# Sync Width 1.631 us 60.450 us +# 17 chars 3 lines +# Front Porch 0.768 us 20.15 us +# 8 chars 1 lines +# Back Porch 2.399 us 0.483 ms +# 25 chars 24 lines +# Active Time 15.352 us 16.120 ms +# 160 chars 800 lines +# Blank Time 4.798 us 0.564 ms +# 50 chars 28 lines +# Polarity negtive positive +# + mode "1280x800-60" +# D: 83.500 MHz, H: 49.702 kHz, V: 60.00 Hz + geometry 1280 800 1280 800 32 timings 11994 200 72 22 3 128 6 endmode +# +# 1280x960, 60 Hz, Non-Interlaced (108.00 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 960 +# Scan Frequency 60.000 kHz 60.00 Hz +# Sync Width 1.037 us 0.050 ms +# 14 chars 3 lines +# Front Porch 0.889 us 0.017 ms +# 12 chars 1 lines +# Back Porch 2.889 us 0.600 ms +# 39 chars 36 lines +# Active Time 11.852 us 16.000 ms +# 160 chars 960 lines +# Blank Time 4.815 us 0.667 ms +# 65 chars 40 lines +# Polarity positive positive +# + mode "1280x960-60" +# D: 108.00 MHz, H: 60.000 kHz, V: 60.00 Hz + geometry 1280 960 1280 960 32 + timings 9259 312 96 36 1 112 3 hsync high vsync high endmode +# +# 1280x1024, 60 Hz, Non-Interlaced (108.00 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 1024 +# Scan Frequency 63.981 kHz 60.02 Hz +# Sync Width 1.037 us 0.047 ms +# 14 chars 3 lines +# Front Porch 0.444 us 0.015 ms +# 6 chars 1 lines +# Back Porch 2.297 us 0.594 ms +# 31 chars 38 lines +# Active Time 11.852 us 16.005 ms +# 160 chars 1024 lines +# Blank Time 3.778 us 0.656 ms +# 51 chars 42 lines +# Polarity positive positive +# + mode "1280x1024-60" +# D: 108.00 MHz, H: 63.981 kHz, V: 60.02 Hz + geometry 1280 1024 1280 1024 32 + timings 9260 248 48 38 1 112 3 hsync high vsync high endmode +# +# 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 1024 +# Scan Frequency 79.976 kHz 75.02 Hz +# Sync Width 1.067 us 0.038 ms +# 18 chars 3 lines +# Front Porch 0.119 us 0.012 ms +# 2 chars 1 lines +# Back Porch 1.837 us 0.475 ms +# 31 chars 38 lines +# Active Time 9.481 us 12.804 ms +# 160 chars 1024 lines +# Blank Time 3.022 us 0.525 ms +# 51 chars 42 lines +# Polarity positive positive +# + mode "1280x1024-75" +# D: 135.00 MHz, H: 79.976 kHz, V: 75.02 Hz + geometry 1280 1024 1280 1024 32 + timings 7408 248 16 38 1 144 3 hsync high vsync high endmode +# +# 1280x1024, 85 Hz, Non-Interlaced (157.50 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 1024 +# Scan Frequency 91.146 kHz 85.02 Hz +# Sync Width 1.016 us 0.033 ms +# 20 chars 3 lines +# Front Porch 0.406 us 0.011 ms +# 8 chars 1 lines +# Back Porch 1.422 us 0.483 ms +# 28 chars 44 lines +# Active Time 8.127 us 11.235 ms +# 160 chars 1024 lines +# Blank Time 2.844 us 0.527 ms +# 56 chars 48 lines +# Polarity positive positive +# + mode "1280x1024-85" +# D: 157.50 MHz, H: 91.146 kHz, V: 85.02 Hz + geometry 1280 1024 1280 1024 32 + timings 6349 224 64 44 1 160 3 + hsync high vsync high endmode mode "1440x900-60" +# D: 106.500 MHz, H: 55.935 kHz, V: 60.00 Hz + geometry 1440 900 1440 900 32 + timings 9390 232 80 25 3 152 6 + hsync high vsync high endmode mode "1440x900-75" +# D: 136.750 MHz, H: 70.635 kHz, V: 75.00 Hz + geometry 1440 900 1440 900 32 + timings 7315 248 96 33 3 152 6 hsync high vsync high endmode +# +# 1440x1050, 60 Hz, Non-Interlaced (125.10 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1440 1050 +# Scan Frequency 65.220 kHz 60.00 Hz +# Sync Width 1.204 us 0.046 ms +# 19 chars 3 lines +# Front Porch 0.760 us 0.015 ms +# 12 chars 1 lines +# Back Porch 1.964 us 0.495 ms +# 31 chars 33 lines +# Active Time 11.405 us 16.099 ms +# 180 chars 1050 lines +# Blank Time 3.928 us 0.567 ms +# 62 chars 37 lines +# Polarity positive positive +# + mode "1440x1050-60" +# D: 125.10 MHz, H: 65.220 kHz, V: 60.00 Hz + geometry 1440 1050 1440 1050 32 + timings 7993 248 96 33 1 152 3 + hsync high vsync high endmode mode "1600x900-60" +# D: 118.250 MHz, H: 55.990 kHz, V: 60.00 Hz + geometry 1600 900 1600 900 32 + timings 8415 256 88 26 3 168 5 endmode mode "1600x1024-60" +# D: 136.358 MHz, H: 63.600 kHz, V: 60.00 Hz + geometry 1600 1024 1600 1024 32 timings 7315 272 104 32 1 168 3 endmode +# +# 1600x1200, 60 Hz, Non-Interlaced (156.00 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1600 1200 +# Scan Frequency 76.200 kHz 60.00 Hz +# Sync Width 1.026 us 0.105 ms +# 20 chars 8 lines +# Front Porch 0.205 us 0.131 ms +# 4 chars 10 lines +# Back Porch 1.636 us 0.682 ms +# 32 chars 52 lines +# Active Time 10.256 us 15.748 ms +# 200 chars 1200 lines +# Blank Time 2.872 us 0.866 ms +# 56 chars 66 lines +# Polarity negative negative +# + mode "1600x1200-60" +# D: 156.00 MHz, H: 76.200 kHz, V: 60.00 Hz + geometry 1600 1200 1600 1200 32 timings 6172 256 32 52 10 160 8 endmode +# +# 1600x1200, 75 Hz, Non-Interlaced (202.50 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1600 1200 +# Scan Frequency 93.750 kHz 75.00 Hz +# Sync Width 0.948 us 0.032 ms +# 24 chars 3 lines +# Front Porch 0.316 us 0.011 ms +# 8 chars 1 lines +# Back Porch 1.501 us 0.491 ms +# 38 chars 46 lines +# Active Time 7.901 us 12.800 ms +# 200 chars 1200 lines +# Blank Time 2.765 us 0.533 ms +# 70 chars 50 lines +# Polarity positive positive +# + mode "1600x1200-75" +# D: 202.50 MHz, H: 93.750 kHz, V: 75.00 Hz + geometry 1600 1200 1600 1200 32 + timings 4938 304 64 46 1 192 3 + hsync high vsync high endmode mode "1680x1050-60" +# D: 146.250 MHz, H: 65.290 kHz, V: 59.954 Hz + geometry 1680 1050 1680 1050 32 + timings 6814 280 104 30 3 176 6 + hsync high vsync high endmode mode "1680x1050-75" +# D: 187.000 MHz, H: 82.306 kHz, V: 74.892 Hz + geometry 1680 1050 1680 1050 32 + timings 5348 296 120 40 3 176 6 + hsync high vsync high endmode mode "1792x1344-60" +# D: 202.975 MHz, H: 83.460 kHz, V: 60.00 Hz + geometry 1792 1344 1792 1344 32 + timings 4902 320 128 43 1 192 3 + hsync high vsync high endmode mode "1856x1392-60" +# D: 218.571 MHz, H: 86.460 kHz, V: 60.00 Hz + geometry 1856 1392 1856 1392 32 + timings 4577 336 136 45 1 200 3 + hsync high vsync high endmode mode "1920x1200-60" +# D: 193.250 MHz, H: 74.556 kHz, V: 60.00 Hz + geometry 1920 1200 1920 1200 32 + timings 5173 336 136 36 3 200 6 + hsync high vsync high endmode mode "1920x1440-60" +# D: 234.000 MHz, H:90.000 kHz, V: 60.00 Hz + geometry 1920 1440 1920 1440 32 + timings 4274 344 128 56 1 208 3 + hsync high vsync high endmode mode "1920x1440-75" +# D: 297.000 MHz, H:112.500 kHz, V: 75.00 Hz + geometry 1920 1440 1920 1440 32 + timings 3367 352 144 56 1 224 3 + hsync high vsync high endmode mode "2048x1536-60" +# D: 267.250 MHz, H: 95.446 kHz, V: 60.00 Hz + geometry 2048 1536 2048 1536 32 + timings 3742 376 152 49 3 224 4 hsync high vsync high endmode +# +# 1280x720, 60 Hz, Non-Interlaced (74.481 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1280 720 +# Scan Frequency 44.760 kHz 60.00 Hz +# Sync Width 1.826 us 67.024 ms +# 17 chars 3 lines +# Front Porch 0.752 us 22.341 ms +# 7 chars 1 lines +# Back Porch 2.578 us 491.510 ms +# 24 chars 22 lines +# Active Time 17.186 us 16.086 ms +# 160 chars 720 lines +# Blank Time 5.156 us 0.581 ms +# 48 chars 26 lines +# Polarity negative negative +# + mode "1280x720-60" +# D: 74.481 MHz, H: 44.760 kHz, V: 60.00 Hz + geometry 1280 720 1280 720 32 timings 13426 192 64 22 1 136 3 endmode +# +# 1920x1080, 60 Hz, Non-Interlaced (172.798 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1920 1080 +# Scan Frequency 67.080 kHz 60.00 Hz +# Sync Width 1.204 us 44.723 ms +# 26 chars 3 lines +# Front Porch 0.694 us 14.908 ms +# 15 chars 1 lines +# Back Porch 1.898 us 506.857 ms +# 41 chars 34 lines +# Active Time 11.111 us 16.100 ms +# 240 chars 1080 lines +# Blank Time 3.796 us 0.566 ms +# 82 chars 38 lines +# Polarity negative negative +# + mode "1920x1080-60" +# D: 74.481 MHz, H: 67.080 kHz, V: 60.00 Hz + geometry 1920 1080 1920 1080 32 timings 5787 328 120 34 1 208 3 endmode +# +# 1400x1050, 60 Hz, Non-Interlaced (122.61 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1400 1050 +# Scan Frequency 65.218 kHz 59.99 Hz +# Sync Width 1.037 us 0.047 ms +# 19 chars 3 lines +# Front Porch 0.444 us 0.015 ms +# 11 chars 1 lines +# Back Porch 1.185 us 0.188 ms +# 30 chars 33 lines +# Active Time 12.963 us 16.411 ms +# 175 chars 1050 lines +# Blank Time 2.667 us 0.250 ms +# 60 chars 37 lines +# Polarity negative positive +# + mode "1400x1050-60" +# D: 122.750 MHz, H: 65.317 kHz, V: 59.99 Hz + geometry 1400 1050 1408 1050 32 + timings 8214 232 88 32 3 144 4 endmode mode "1400x1050-75" +# D: 156.000 MHz, H: 82.278 kHz, V: 74.867 Hz + geometry 1400 1050 1408 1050 32 timings 6410 248 104 42 3 144 4 endmode +# +# 1366x768, 60 Hz, Non-Interlaced (85.86 MHz dotclock) +# +# Horizontal Vertical +# Resolution 1366 768 +# Scan Frequency 47.700 kHz 60.00 Hz +# Sync Width 1.677 us 0.063 ms +# 18 chars 3 lines +# Front Porch 0.839 us 0.021 ms +# 9 chars 1 lines +# Back Porch 2.516 us 0.482 ms +# 27 chars 23 lines +# Active Time 15.933 us 16.101 ms +# 171 chars 768 lines +# Blank Time 5.031 us 0.566 ms +# 54 chars 27 lines +# Polarity negative positive +# + mode "1360x768-60" +# D: 84.750 MHz, H: 47.720 kHz, V: 60.00 Hz + geometry 1360 768 1360 768 32 + timings 11799 208 72 22 3 136 5 endmode mode "1366x768-60" +# D: 85.86 MHz, H: 47.700 kHz, V: 60.00 Hz + geometry 1366 768 1366 768 32 + timings 11647 216 72 23 1 144 3 endmode mode "1366x768-50" +# D: 69,924 MHz, H: 39.550 kHz, V: 50.00 Hz + geometry 1366 768 1366 768 32 timings 14301 200 56 19 1 144 3 endmode diff --git a/Documentation/fb/viafb.txt b/Documentation/fb/viafb.txt new file mode 100644 index 0000000..67dbf44 --- /dev/null +++ b/Documentation/fb/viafb.txt @@ -0,0 +1,214 @@ + + VIA Integration Graphic Chip Console Framebuffer Driver + +[Platform] +----------------------- + The console framebuffer driver is for graphics chips of + VIA UniChrome Family(CLE266, PM800 / CN400 / CN300, + P4M800CE / P4M800Pro / CN700 / VN800, + CX700 / VX700, K8M890, P4M890, + CN896 / P4M900, VX800) + +[Driver features] +------------------------ + Device: CRT, LCD, DVI + + Support viafb_mode: + CRT: + 640x480(60, 75, 85, 100, 120 Hz), 720x480(60 Hz), + 720x576(60 Hz), 800x600(60, 75, 85, 100, 120 Hz), + 848x480(60 Hz), 856x480(60 Hz), 1024x512(60 Hz), + 1024x768(60, 75, 85, 100 Hz), 1152x864(75 Hz), + 1280x768(60 Hz), 1280x960(60 Hz), 1280x1024(60, 75, 85 Hz), + 1440x1050(60 Hz), 1600x1200(60, 75 Hz), 1280x720(60 Hz), + 1920x1080(60 Hz), 1400x1050(60 Hz), 800x480(60 Hz) + + color depth: 8 bpp, 16 bpp, 32 bpp supports. + + Support 2D hardware accelerator. + +[Using the viafb module] +-- -- -------------------- + Start viafb with default settings: + #modprobe viafb + + Start viafb with with user options: + #modprobe viafb viafb_mode=800x600 viafb_bpp=16 viafb_refresh=60 + viafb_active_dev=CRT+DVI viafb_dvi_port=DVP1 + viafb_mode1=1024x768 viafb_bpp=16 viafb_refresh1=60 + viafb_SAMM_ON=1 + + viafb_mode: + 640x480 (default) + 720x480 + 800x600 + 1024x768 + ...... + + viafb_bpp: + 8, 16, 32 (default:32) + + viafb_refresh: + 60, 75, 85, 100, 120 (default:60) + + viafb_lcd_dsp_method: + 0 : expansion (default) + 1 : centering + + viafb_lcd_mode: + 0 : LCD panel with LSB data format input (default) + 1 : LCD panel with MSB data format input + + viafb_lcd_panel_id: + 0 : Resolution: 640x480, Channel: single, Dithering: Enable + 1 : Resolution: 800x600, Channel: single, Dithering: Enable + 2 : Resolution: 1024x768, Channel: single, Dithering: Enable (default) + 3 : Resolution: 1280x768, Channel: single, Dithering: Enable + 4 : Resolution: 1280x1024, Channel: dual, Dithering: Enable + 5 : Resolution: 1400x1050, Channel: dual, Dithering: Enable + 6 : Resolution: 1600x1200, Channel: dual, Dithering: Enable + + 8 : Resolution: 800x480, Channel: single, Dithering: Enable + 9 : Resolution: 1024x768, Channel: dual, Dithering: Enable + 10: Resolution: 1024x768, Channel: single, Dithering: Disable + 11: Resolution: 1024x768, Channel: dual, Dithering: Disable + 12: Resolution: 1280x768, Channel: single, Dithering: Disable + 13: Resolution: 1280x1024, Channel: dual, Dithering: Disable + 14: Resolution: 1400x1050, Channel: dual, Dithering: Disable + 15: Resolution: 1600x1200, Channel: dual, Dithering: Disable + 16: Resolution: 1366x768, Channel: single, Dithering: Disable + 17: Resolution: 1024x600, Channel: single, Dithering: Enable + 18: Resolution: 1280x768, Channel: dual, Dithering: Enable + 19: Resolution: 1280x800, Channel: single, Dithering: Enable + + viafb_accel: + 0 : No 2D Hardware Acceleration + 1 : 2D Hardware Acceleration (default) + + viafb_SAMM_ON: + 0 : viafb_SAMM_ON disable (default) + 1 : viafb_SAMM_ON enable + + viafb_mode1: (secondary display device) + 640x480 (default) + 720x480 + 800x600 + 1024x768 + ... ... + + viafb_bpp1: (secondary display device) + 8, 16, 32 (default:32) + + viafb_refresh1: (secondary display device) + 60, 75, 85, 100, 120 (default:60) + + viafb_active_dev: + This option is used to specify active devices.(CRT, DVI, CRT+LCD...) + DVI stands for DVI or HDMI, E.g., If you want to enable HDMI, + set viafb_active_dev=DVI. In SAMM case, the previous of + viafb_active_dev is primary device, and the following is + secondary device. + + For example: + To enable one device, such as DVI only, we can use: + modprobe viafb viafb_active_dev=DVI + To enable two devices, such as CRT+DVI: + modprobe viafb viafb_active_dev=CRT+DVI; + + For DuoView case, we can use: + modprobe viafb viafb_active_dev=CRT+DVI + OR + modprobe viafb viafb_active_dev=DVI+CRT... + + For SAMM case: + If CRT is primary and DVI is secondary, we should use: + modprobe viafb viafb_active_dev=CRT+DVI viafb_SAMM_ON=1... + If DVI is primary and CRT is secondary, we should use: + modprobe viafb viafb_active_dev=DVI+CRT viafb_SAMM_ON=1... + + viafb_display_hardware_layout: + This option is used to specify display hardware layout for CX700 chip. + 1 : LCD only + 2 : DVI only + 3 : LCD+DVI (default) + 4 : LCD1+LCD2 (internal + internal) + 16: LCD1+ExternalLCD2 (internal + external) + + viafb_second_size: + This option is used to set second device memory size(MB) in SAMM case. + The minimal size is 16. + + viafb_platform_epia_dvi: + This option is used to enable DVI on EPIA - M + 0 : No DVI on EPIA - M (default) + 1 : DVI on EPIA - M + + viafb_bus_width: + When using 24 - Bit Bus Width Digital Interface, + this option should be set. + 12: 12-Bit LVDS or 12-Bit TMDS (default) + 24: 24-Bit LVDS or 24-Bit TMDS + + viafb_device_lcd_dualedge: + When using Dual Edge Panel, this option should be set. + 0 : No Dual Edge Panel (default) + 1 : Dual Edge Panel + + viafb_video_dev: + This option is used to specify video output devices(CRT, DVI, LCD) for + duoview case. + For example: + To output video on DVI, we should use: + modprobe viafb viafb_video_dev=DVI... + + viafb_lcd_port: + This option is used to specify LCD output port, + available values are "DVP0" "DVP1" "DFP_HIGHLOW" "DFP_HIGH" "DFP_LOW". + for external LCD + external DVI on CX700(External LCD is on DVP0), + we should use: + modprobe viafb viafb_lcd_port=DVP0... + +Notes: + 1. CRT may not display properly for DuoView CRT & DVI display at + the "640x480" PAL mode with DVI overscan enabled. + 2. SAMM stands for single adapter multi monitors. It is different from + multi-head since SAMM support multi monitor at driver layers, thus fbcon + layer doesn't even know about it; SAMM's second screen doesn't have a + device node file, thus a user mode application can't access it directly. + When SAMM is enabled, viafb_mode and viafb_mode1, viafb_bpp and + viafb_bpp1, viafb_refresh and viafb_refresh1 can be different. + 3. When console is depending on viafbinfo1, dynamically change resolution + and bpp, need to call VIAFB specified ioctl interface VIAFB_SET_DEVICE + instead of calling common ioctl function FBIOPUT_VSCREENINFO since + viafb doesn't support multi-head well, or it will cause screen crush. + 4. VX800 2D accelerator hasn't been supported in this driver yet. When + using driver on VX800, the driver will disable the acceleration + function as default. + + +[Configure viafb with "fbset" tool] +----------------------------------- + "fbset" is an inbox utility of Linux. + 1. Inquire current viafb information, type, + # fbset -i + + 2. Set various resolutions and viafb_refresh rates, + # fbset <resolution-vertical_sync> + + example, + # fbset "1024x768-75" + or + # fbset -g 1024 768 1024 768 32 + Check the file "/etc/fb.modes" to find display modes available. + + 3. Set the color depth, + # fbset -depth <value> + + example, + # fbset -depth 16 + +[Bootup with viafb]: +-------------------- + Add the following line to your grub.conf: + append = "video=viafb:viafb_mode=1024x768,viafb_bpp=32,viafb_refresh=85" + diff --git a/Documentation/fb/vt8623fb.txt b/Documentation/fb/vt8623fb.txt new file mode 100644 index 0000000..f654576 --- /dev/null +++ b/Documentation/fb/vt8623fb.txt @@ -0,0 +1,64 @@ + + vt8623fb - fbdev driver for graphics core in VIA VT8623 chipset + =============================================================== + + +Supported Hardware +================== + + VIA VT8623 [CLE266] chipset and its graphics core + (known as CastleRock or Unichrome) + +I tested vt8623fb on VIA EPIA ML-6000 + + +Supported Features +================== + + * 4 bpp pseudocolor modes (with 18bit palette, two variants) + * 8 bpp pseudocolor mode (with 18bit palette) + * 16 bpp truecolor mode (RGB 565) + * 32 bpp truecolor mode (RGB 888) + * text mode (activated by bpp = 0) + * doublescan mode variant (not available in text mode) + * panning in both directions + * suspend/resume support + * DPMS support + +Text mode is supported even in higher resolutions, but there is limitation to +lower pixclocks (maximum about 100 MHz). This limitation is not enforced by +driver. Text mode supports 8bit wide fonts only (hardware limitation) and +16bit tall fonts (driver limitation). + +There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with +packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode +with interleaved planes (1 byte interleave), MSB first. Both modes support +8bit wide fonts only (driver limitation). + +Suspend/resume works on systems that initialize video card during resume and +if device is active (for example used by fbcon). + + +Missing Features +================ +(alias TODO list) + + * secondary (not initialized by BIOS) device support + * MMIO support + * interlaced mode variant + * support for fontwidths != 8 in 4 bpp modes + * support for fontheight != 16 in text mode + * hardware cursor + * video overlay support + * vsync synchronization + * acceleration support (8514-like 2D, busmaster transfers) + + +Known bugs +========== + + * cursor disable in text mode doesn't work + + +-- +Ondrej Zajicek <santiago@crfreenet.org> |
