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docs: fb: convert docs to ReST and rename to *.rst

Browse Source 
The conversion is actually:
  - add blank lines and identation in order to identify paragraphs;
  - fix tables markups;
  - add some lists markups;
  - mark literal blocks;
  - adjust title markups.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Also, removed the Maintained by, as requested by Geert.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab 2019-06-12 14:52:45 -03:00 committed by Jonathan Corbet
parent 10ffebbed5
commit ab42b81895
47 changed files with 1945 additions and 1658 deletions
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2
Documentation/admin-guide/kernel-parameters.txt
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@ -5024,7 +5024,7 @@
vector=percpu: enable percpu vector domain
video= [FB] Frame buffer configuration
See Documentation/fb/modedb.txt.
See Documentation/fb/modedb.rst.
video.brightness_switch_enabled= [0,1]
If set to 1, on receiving an ACPI notify event

29
Documentation/fb/api.txt → Documentation/fb/api.rst
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@ -1,5 +1,6 @@
The Frame Buffer Device API
---------------------------
===========================
The Frame Buffer Device API
===========================
Last revised: June 21, 2011
@ -21,13 +22,13 @@ deal with different behaviours.
---------------
Device and driver capabilities are reported in the fixed screen information
capabilities field.
capabilities field::
struct fb_fix_screeninfo {
struct fb_fix_screeninfo {
...
__u16 capabilities; /* see FB_CAP_* */
...
};
};
Application should use those capabilities to find out what features they can
expect from the device and driver.
@ -151,9 +152,9 @@ fb_fix_screeninfo and fb_var_screeninfo structure respectively.
struct fb_fix_screeninfo stores device independent unchangeable information
about the frame buffer device and the current format. Those information can't
be directly modified by applications, but can be changed by the driver when an
application modifies the format.
application modifies the format::
struct fb_fix_screeninfo {
struct fb_fix_screeninfo {
char id[16]; /* identification string eg "TT Builtin" */
unsigned long smem_start; /* Start of frame buffer mem */
/* (physical address) */
@ -172,13 +173,13 @@ struct fb_fix_screeninfo {
/* specific chip/card we have */
__u16 capabilities; /* see FB_CAP_* */
__u16 reserved[2]; /* Reserved for future compatibility */
};
};
struct fb_var_screeninfo stores device independent changeable information
about a frame buffer device, its current format and video mode, as well as
other miscellaneous parameters.
other miscellaneous parameters::
struct fb_var_screeninfo {
struct fb_var_screeninfo {
__u32 xres; /* visible resolution */
__u32 yres;
__u32 xres_virtual; /* virtual resolution */
@ -216,7 +217,7 @@ struct fb_var_screeninfo {
__u32 rotate; /* angle we rotate counter clockwise */
__u32 colorspace; /* colorspace for FOURCC-based modes */
__u32 reserved[4]; /* Reserved for future compatibility */
};
};
To modify variable information, applications call the FBIOPUT_VSCREENINFO
ioctl with a pointer to a fb_var_screeninfo structure. If the call is
@ -255,14 +256,14 @@ monochrome, grayscale or pseudocolor visuals, although this is not required.
- For truecolor and directcolor formats, applications set the grayscale field
to zero, and the red, blue, green and transp fields to describe the layout of
color components in memory.
color components in memory::
struct fb_bitfield {
struct fb_bitfield {
__u32 offset; /* beginning of bitfield */
__u32 length; /* length of bitfield */
__u32 msb_right; /* != 0 : Most significant bit is */
/* right */
};
};
Pixel values are bits_per_pixel wide and are split in non-overlapping red,
green, blue and alpha (transparency) components. Location and size of each

8
Documentation/fb/arkfb.txt → Documentation/fb/arkfb.rst
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@ -1,6 +1,6 @@
arkfb - fbdev driver for ARK Logic chips
========================================
========================================
arkfb - fbdev driver for ARK Logic chips
========================================
Supported Hardware
@ -47,7 +47,7 @@ Missing Features
(alias TODO list)
* secondary (not initialized by BIOS) device support
* big endian support
* big endian support
* DPMS support
* MMIO support
* interlaced mode variant

33
Documentation/fb/aty128fb.txt → Documentation/fb/aty128fb.rst
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@ -1,8 +1,9 @@
[This file is cloned from VesaFB/matroxfb]
=================
What is aty128fb?
=================
.. [This file is cloned from VesaFB/matroxfb]
This is a driver for a graphic framebuffer for ATI Rage128 based devices
on Intel and PPC boxes.
@ -24,15 +25,15 @@ How to use it?
==============
Switching modes is done using the video=aty128fb:<resolution>... modedb
boot parameter or using `fbset' program.
boot parameter or using `fbset` program.
See Documentation/fb/modedb.txt for more information on modedb
See Documentation/fb/modedb.rst 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).
Documentation/fb/vesafb.rst for details).
X11
@ -48,16 +49,18 @@ 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 `:').
`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.
========= =======================================================
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
@ -65,8 +68,8 @@ 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
- This driver is still experimental and is not finished. Too many
bugs/errata to list here.
--
Brad Douglas <brad@neruo.com>

47
Documentation/fb/cirrusfb.txt → Documentation/fb/cirrusfb.rst
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@ -1,32 +1,32 @@
============================================
Framebuffer driver for Cirrus Logic chipsets
============================================
Framebuffer driver for Cirrus Logic chipsets
Copyright 1999 Jeff Garzik <jgarzik@pobox.com>
Copyright 1999 Jeff Garzik <jgarzik@pobox.com>
{ just a little something to get people going; contributors welcome! }
.. 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)
- SD64
- Piccolo
- Picasso
- Spectrum
- Alpine (GD-543x/4x)
- Picasso4 (GD-5446)
- GD-5480
- Laguna (GD-546x)
Bus's supported:
PCI
Zorro
- PCI
- Zorro
Architectures supported:
i386
Alpha
PPC (Motorola Powerstack)
m68k (Amiga)
- i386
- Alpha
- PPC (Motorola Powerstack)
- m68k (Amiga)
@ -34,10 +34,9 @@ Default video modes
-------------------
At the moment, there are two kernel command line arguments supported:
mode:640x480
mode:800x600
or
mode:1024x768
- mode:640x480
- mode:800x600
- mode:1024x768
Full support for startup video modes (modedb) will be integrated soon.
@ -93,5 +92,3 @@ Version 1.9.4
Version 1.9.3
-------------
* Bundled with kernel 2.3.14-pre1 or later.

59
Documentation/fb/cmap_xfbdev.txt → Documentation/fb/cmap_xfbdev.rst
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@ -1,26 +1,29 @@
==========================
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);
- example of relevant structures in fbdev as used for a 3-bit grayscale cmap::
*. X11 apps do something like the following when trying to use grayscale.
for (i=0; i < 8; i++) {
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);
@ -28,26 +31,26 @@ for (i=0; i < 8; i++) {
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:
xc-011010/programs/Xserver/dix/colormap.c::
FindBestPixel(pentFirst, size, prgb, channel)
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);
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.

28
Documentation/fb/deferred_io.txt → Documentation/fb/deferred_io.rst
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@ -1,5 +1,6 @@
===========
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
@ -16,7 +17,7 @@ works:
- 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
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
@ -47,29 +48,32 @@ How to use it: (for fbdev drivers)
----------------------------------
The following example may be helpful.
1. Setup your structure. Eg:
1. Setup your structure. Eg::
static struct fb_deferred_io hecubafb_defio = {
.delay = HZ,
.deferred_io = hecubafb_dpy_deferred_io,
};
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)
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
3. Call init::
info->fbdefio = &hecubafb_defio;
fb_deferred_io_init(info);
4. Call cleanup
4. Call cleanup::
fb_deferred_io_cleanup(info);

18
Documentation/fb/efifb.txt → Documentation/fb/efifb.rst
View File

@ -1,6 +1,6 @@
==============
What is efifb?
===============
==============
This is a generic EFI platform driver for Intel based Apple computers.
efifb is only for EFI booted Intel Macs.
@ -8,16 +8,17 @@ efifb is only for EFI booted Intel Macs.
Supported Hardware
==================
iMac 17"/20"
Macbook
Macbook Pro 15"/17"
MacMini
- iMac 17"/20"
- Macbook
- Macbook Pro 15"/17"
- MacMini
How to use it?
==============
efifb does not have any kind of autodetection of your machine.
You have to add the following kernel parameters in your elilo.conf:
You have to add the following kernel parameters in your elilo.conf::
Macbook :
video=efifb:macbook
MacMini :
@ -29,9 +30,10 @@ You have to add the following kernel parameters in your elilo.conf:
Accepted options:
======= ===========================================================
nowc Don't map the framebuffer write combined. This can be used
to workaround side-effects and slowdowns on other CPU cores
when large amounts of console data are written.
======= ===========================================================
--
Edgar Hucek <gimli@dark-green.com>

27
Documentation/fb/ep93xx-fb.txt → Documentation/fb/ep93xx-fb.rst
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@ -4,7 +4,7 @@ Driver for EP93xx LCD controller
The EP93xx LCD controller can drive both standard desktop monitors and
embedded LCD displays. If you have a standard desktop monitor then you
can use the standard Linux video mode database. In your board file:
can use the standard Linux video mode database. In your board file::
static struct ep93xxfb_mach_info some_board_fb_info = {
.num_modes = EP93XXFB_USE_MODEDB,
@ -12,7 +12,7 @@ can use the standard Linux video mode database. In your board file:
};
If you have an embedded LCD display then you need to define a video
mode for it as follows:
mode for it as follows::
static struct fb_videomode some_board_video_modes[] = {
{
@ -23,11 +23,11 @@ mode for it as follows:
Note that the pixel clock value is in pico-seconds. You can use the
KHZ2PICOS macro to convert the pixel clock value. Most other values
are in pixel clocks. See Documentation/fb/framebuffer.txt for further
are in pixel clocks. See Documentation/fb/framebuffer.rst for further
details.
The ep93xxfb_mach_info structure for your board should look like the
following:
following::
static struct ep93xxfb_mach_info some_board_fb_info = {
.num_modes = ARRAY_SIZE(some_board_video_modes),
@ -37,7 +37,7 @@ following:
};
The framebuffer device can be registered by adding the following to
your board initialisation function:
your board initialisation function::
ep93xx_register_fb(&some_board_fb_info);
@ -50,6 +50,7 @@ to configure the controller. The video attributes flags are fully
documented in section 7 of the EP93xx users' guide. The following
flags are available:
=============================== ==========================================
EP93XXFB_PCLK_FALLING Clock data on the falling edge of the
pixel clock. The default is to clock
data on the rising edge.
@ -62,10 +63,12 @@ EP93XXFB_SYNC_HORIZ_HIGH Horizontal sync is active high. By
EP93XXFB_SYNC_VERT_HIGH Vertical sync is active high. By
default the vertical sync is active high.
=============================== ==========================================
The physical address of the framebuffer can be controlled using the
following flags:
=============================== ======================================
EP93XXFB_USE_SDCSN0 Use SDCSn[0] for the framebuffer. This
is the default setting.
@ -74,6 +77,7 @@ EP93XXFB_USE_SDCSN1 Use SDCSn[1] for the framebuffer.
EP93XXFB_USE_SDCSN2 Use SDCSn[2] for the framebuffer.
EP93XXFB_USE_SDCSN3 Use SDCSn[3] for the framebuffer.
=============================== ======================================
==================
Platform callbacks
@ -87,7 +91,7 @@ blanked or unblanked.
The setup and teardown devices pass the platform_device structure as
an argument. The fb_info and ep93xxfb_mach_info structures can be
obtained as follows:
obtained as follows::
static int some_board_fb_setup(struct platform_device *pdev)
{
@ -101,17 +105,17 @@ obtained as follows:
Setting the video mode
======================
The video mode is set using the following syntax:
The video mode is set using the following syntax::
video=XRESxYRES[-BPP][@REFRESH]
If the EP93xx video driver is built-in then the video mode is set on
the Linux kernel command line, for example:
the Linux kernel command line, for example::
video=ep93xx-fb:800x600-16@60
If the EP93xx video driver is built as a module then the video mode is
set when the module is installed:
set when the module is installed::
modprobe ep93xx-fb video=320x240
@ -121,13 +125,14 @@ Screenpage bug
At least on the EP9315 there is a silicon bug which causes bit 27 of
the VIDSCRNPAGE (framebuffer physical offset) to be tied low. There is
an unofficial errata for this bug at:
an unofficial errata for this bug at::
http://marc.info/?l=linux-arm-kernel&m=110061245502000&w=2
By default the EP93xx framebuffer driver checks if the allocated physical
address has bit 27 set. If it does, then the memory is freed and an
error is returned. The check can be disabled by adding the following
option when loading the driver:
option when loading the driver::
ep93xx-fb.check_screenpage_bug=0

177
Documentation/fb/fbcon.txt → Documentation/fb/fbcon.rst
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@ -1,39 +1,41 @@
=======================
The Framebuffer Console
=======================
The framebuffer console (fbcon), as its name implies, is a text
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
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
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
The framebuffer console can be enabled by using your favorite kernel
configuration tool. It is under Device Drivers->Graphics Support->Frame
buffer Devices->Console display driver support->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
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 Graphics
To display the penguin logo, choose any logo available in Graphics
support->Bootup logo.
Also, you will need to select at least one compiled-in font, but if
Also, you will need to select at least one compiled-in font, but if
you don't do anything, the kernel configuration tool will select one for you,
usually an 8x16 font.
@ -44,6 +46,7 @@ fortunate to have a driver that does not alter the graphics chip, then you
will still get a VGA console.
B. Loading
==========
Possible scenarios:
@ -72,33 +75,33 @@ Possible scenarios:
C. Boot options
The framebuffer console has several, largely unknown, boot options
that can change its behavior.
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: 10x18, 6x10, 7x14, Acorn8x8, MINI4x6,
PEARL8x8, ProFont6x11, SUN12x22, SUN8x16, VGA8x16, VGA8x8.
Select the initial font to use. The value 'name' can be any of the
compiled-in fonts: 10x18, 6x10, 7x14, Acorn8x8, MINI4x6,
PEARL8x8, ProFont6x11, SUN12x22, SUN8x16, VGA8x16, VGA8x8.
Note, not all drivers can handle font with widths not divisible by 8,
such as vga16fb.
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.
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:
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 ...
@ -126,20 +129,20 @@ C. Boot options
4. fbcon=rotate:<n>
This option changes the orientation angle of the console display. The
value 'n' accepts the following:
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)
- 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
- rotate - rotate the display of the active console
- rotate_all - rotate the display of all consoles
Console rotation will only become available if Framebuffer Console
Rotation support is compiled in your kernel.
@ -177,9 +180,9 @@ Before going on to 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:
the hardware. Thus, in a VGA console::
console ---> VGA driver ---> hardware.
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
@ -187,9 +190,9 @@ 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:
because fbcon is an intermediate layer between the console and the drivers::
console ---> fbcon ---> fbdev drivers ---> hardware
console ---> fbcon ---> fbdev drivers ---> hardware
The fbdev drivers cannot be unloaded if bound to fbcon, and fbcon cannot
be unloaded if it's bound to the console layer.
@ -204,12 +207,12 @@ 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:
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
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
@ -223,19 +226,19 @@ restored properly. The following is one of the several methods that you can do:
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:
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.
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:
4. If fbcon is compiled as a module, load fbcon by doing::
modprobe fbcon
5. Now to detach fbcon:
5. Now to detach fbcon::
vbetool vbestate restore < <vga state file> && \
echo 0 > /sys/class/vtconsole/vtcon1/bind
@ -243,7 +246,7 @@ restored properly. The following is one of the several methods that you can do:
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:
7. To reattach fbcon::
echo 1 > /sys/class/vtconsole/vtcon1/bind
@ -266,82 +269,82 @@ the following:
Variation 1:
a. Before detaching fbcon, do
a. Before detaching fbcon, do::
vbetool vbemode save > <vesa state file> # do once for each vesafb mode,
# the file can be reused
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
c. Attach fbcon::
vbetool vbestate restore < <vesa state file> && \
vbetool vbestate restore < <vesa state file> && \
echo 1 > /sys/class/vtconsole/vtcon1/bind
Variation 2:
a. Before detaching fbcon, do:
a. Before detaching fbcon, do::
echo <ID> > /sys/class/tty/console/bind
vbetool vbemode get
vbetool vbemode get
b. Take note of the mode number
b. Detach fbcon as in step 5.
c. Attach fbcon:
c. Attach fbcon::
vbetool vbemode set <mode number> && \
echo 1 > /sys/class/vtconsole/vtcon1/bind
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 on an X86 box:
framebuffer console driver if you are on an X86 box::
---------------------------------------------------------------------------
#!/bin/bash
# Unbind fbcon
#!/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
# Change this to where your actual vgastate file is located
# Or Use VGASTATE=$1 to indicate the state file at runtime
VGASTATE=/tmp/vgastate
# path to vbetool
VBETOOL=/usr/local/bin
# path to vbetool
VBETOOL=/usr/local/bin
for (( i = 0; i < 16; i++))
do
if test -x /sys/class/vtconsole/vtcon$i; then
if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \
= 1 ]; then
for (( i = 0; i < 16; i++))
do
if test -x /sys/class/vtconsole/vtcon$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
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
::
#!/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
---------------------------------------------------------------------------
fi
fi
done
--
Antonino Daplas <adaplas@pol.net>

66
Documentation/fb/framebuffer.txt → Documentation/fb/framebuffer.rst
View File

@ -1,7 +1,7 @@
The Frame Buffer Device
-----------------------
=======================
The Frame Buffer Device
=======================
Maintained by Geert Uytterhoeven <geert@linux-m68k.org>
Last revised: May 10, 2001
@ -26,7 +26,7 @@ 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):
minor numbers)::
0 = /dev/fb0 First frame buffer
1 = /dev/fb1 Second frame buffer
@ -34,15 +34,15 @@ minor numbers):
31 = /dev/fb31 32nd frame buffer
For backwards compatibility, you may want to create the following symbolic
links:
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
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
@ -54,11 +54,11 @@ 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):
users)::
export FRAMEBUFFER=/dev/fb1
or (for csh users):
or (for csh users)::
setenv FRAMEBUFFER /dev/fb1
@ -113,10 +113,10 @@ much trouble...
3. Frame Buffer Resolution Maintenance
--------------------------------------
Frame buffer resolutions are maintained using the utility `fbset'. It can
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.
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.
@ -129,8 +129,8 @@ 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
- If the `Display` subsection for the `fbdev` driver in the /etc/XF86Config
file contains a::
Modes "default"
@ -146,7 +146,7 @@ XFree86 and has 2 modes:
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).
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.
@ -172,29 +172,29 @@ 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:
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
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
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:
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
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:
The vertical scanrate is about 59 Hz::
1/(17.002E-3 s) = 58.815 Hz
@ -212,7 +212,7 @@ 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.
vsync length::
+----------+---------------------------------------------+----------+-------+
| | ↑ | | |
@ -256,7 +256,8 @@ The frame buffer device expects all horizontal timings in number of dotclocks
6. Converting XFree86 timing values info frame buffer device timings
--------------------------------------------------------------------
An XFree86 mode line consists of the following fields:
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
@ -271,19 +272,27 @@ The frame buffer device uses the following fields:
- 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,
@ -303,9 +312,10 @@ 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/
- linux/drivers/video/
- linux/include/linux/fb.h
- linux/include/video/
@ -334,10 +344,10 @@ The latest version of fbset can be found at
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
`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.

24
Documentation/fb/gxfb.txt → Documentation/fb/gxfb.rst
View File

@ -1,7 +1,8 @@
[This file is cloned from VesaFB/aty128fb]
=============
What is gxfb?
=================
=============
.. [This file is cloned from VesaFB/aty128fb]
This is a graphics framebuffer driver for AMD Geode GX2 based processors.
@ -23,9 +24,9 @@ How to use it?
==============
Switching modes is done using gxfb.mode_option=<resolution>... boot
parameter or using `fbset' program.
parameter or using `fbset` program.
See Documentation/fb/modedb.txt for more information on modedb
See Documentation/fb/modedb.rst for more information on modedb
resolutions.
@ -42,11 +43,12 @@ 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.
================ ==================================================
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>

50
Documentation/fb/index.rst Normal file
View File

@ -0,0 +1,50 @@
:orphan:
============
Frame Buffer
============
.. toctree::
:maxdepth: 1
api
arkfb
aty128fb
cirrusfb
cmap_xfbdev
deferred_io
efifb
ep93xx-fb
fbcon
framebuffer
gxfb
intel810
intelfb
internals
lxfb
matroxfb
metronomefb
modedb
pvr2fb
pxafb
s3fb
sa1100fb
sh7760fb
sisfb
sm501
sm712fb
sstfb
tgafb
tridentfb
udlfb
uvesafb
vesafb
viafb
vt8623fb
.. only:: subproject and html
Indices
=======
* :ref:`genindex`

77
Documentation/fb/intel810.txt → Documentation/fb/intel810.rst
View File

@ -1,26 +1,31 @@
================================
Intel 810/815 Framebuffer driver
Tony Daplas <adaplas@pol.net>
http://i810fb.sourceforge.net
================================
March 17, 2002
Tony Daplas <adaplas@pol.net>
First Released: July 2001
Last Update: September 12, 2005
================================================================
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
- 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
@ -49,6 +54,7 @@ B. Features
- Supports EDID probing either by DDC/I2C or through the BIOS
C. List of available options
=============================
a. "video=i810fb"
enables the i810 driver
@ -158,7 +164,7 @@ C. List of available options
(default = not set)
n. "dcolor"
Use directcolor visual instead of truecolor for pixel depths greater
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
@ -167,35 +173,37 @@ C. List of available options
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.
Documentation/fb/modedb.rst 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:
with a colon (:) as in the following::
video=i810fb:option1,option2:value2
video=i810fb:option1,option2:value2
Sample Usage
------------
In /etc/lilo.conf, add the line:
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"
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.
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
@ -206,31 +214,32 @@ Example, to enable MTRR, include "mtrr=1".
Sample Usage
------------
Using the same setup as described above, load the module like this:
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
vsync2=85 accel=1 mtrr=1
Or just add the following to a configuration file in /etc/modprobe.d/
Or just add the following to a configuration file in /etc/modprobe.d/::
options i810fb vram=2 xres=1024 bpp=16 hsync1=30 hsync2=55 vsync1=50 \
vsync2=85 accel=1 mtrr=1
and just do a
and just do a::
modprobe i810fb
F. Setup
=========
a. Do your usual method of configuring the kernel.
a. Do your usual method of configuring the kernel
make menuconfig/xconfig/config
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.
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
@ -242,7 +251,7 @@ F. Setup
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
f. If you want a framebuffer console, enable it under "Console
Drivers".
g. Compile your kernel.
@ -253,6 +262,7 @@ F. Setup
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.
@ -269,10 +279,9 @@ G. Acknowledgment:
optimizations possible.
H. Home Page:
==============
A more complete, and probably updated information is provided at
http://i810fb.sourceforge.net.
###########################
Tony

62
Documentation/fb/intelfb.txt → Documentation/fb/intelfb.rst
View File

@ -1,24 +1,28 @@
=============================================================
Intel 830M/845G/852GM/855GM/865G/915G/945G Framebuffer driver
================================================================
=============================================================
A. Introduction
This is a framebuffer driver for various Intel 8xx/9xx compatible
===============
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
- 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
@ -39,12 +43,12 @@ B. List of available options
(default = 4 MB)
d. "voffset=<value>"
select at what offset in MB of the logical memory to allocate the
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.
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)
@ -80,18 +84,19 @@ B. List of available options
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:
with an equals sign (=) as in the following::
video=intelfb:option1,option2=value2
video=intelfb:option1,option2=value2
Sample Usage
------------
In /etc/lilo.conf, add the line:
In /etc/lilo.conf, add the line::
append="video=intelfb:mode=800x600-32@75,accel,hwcursor,vram=8"
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
@ -106,8 +111,9 @@ in this directory.
D. Module options
==================
The module parameters are essentially similar to the kernel
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.
@ -116,23 +122,24 @@ Example, to enable MTRR, include "mtrr=1".
Sample Usage
------------
Using the same setup as described above, load the module like this:
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 a configuration file in /etc/modprobe.d/
Or just add the following to a configuration file in /etc/modprobe.d/::
options intelfb mode=800x600-32@75 vram=8 accel=1 hwcursor=1
and just do a
and just do a::
modprobe intelfb
E. Acknowledgment:
===================
1. Geert Uytterhoeven - his excellent howto and the virtual
framebuffer driver code made this possible.
framebuffer driver code made this possible.
2. Jeff Hartmann for his agpgart code.
@ -145,5 +152,4 @@ E. Acknowledgment:
6. Andrew Morton for his kernel patches maintenance.
###########################
Sylvain

22
Documentation/fb/internals.txt → Documentation/fb/internals.rst
View File

@ -1,13 +1,19 @@
=============================
Frame Buffer device internals
=============================
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
Authors:
- 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 ***
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>.
@ -40,19 +46,18 @@ are defined in <linux/fb.h>.
Generic information, API and low level information about a specific frame
buffer device instance (slot number, board address, ...).
- struct `par'
- 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 ***
Visuals used by the frame buffer device API
===========================================
Monochrome (FB_VISUAL_MONO01 and FB_VISUAL_MONO10)
-------------------------------------------------
--------------------------------------------------
Each pixel is either black or white.
@ -79,4 +84,3 @@ 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.

25
Documentation/fb/lxfb.txt → Documentation/fb/lxfb.rst
View File

@ -1,7 +1,9 @@
[This file is cloned from VesaFB/aty128fb]
=============
What is lxfb?
=================
=============
.. [This file is cloned from VesaFB/aty128fb]
This is a graphics framebuffer driver for AMD Geode LX based processors.
@ -23,9 +25,9 @@ How to use it?
==============
Switching modes is done using lxfb.mode_option=<resolution>... boot
parameter or using `fbset' program.
parameter or using `fbset` program.
See Documentation/fb/modedb.txt for more information on modedb
See Documentation/fb/modedb.rst for more information on modedb
resolutions.
@ -42,11 +44,12 @@ 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.
================ ==================================================
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>

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

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[This file is cloned from VesaFB. Thanks go to Gerd Knorr]
What is matroxfb?
=================
This is a driver for a graphic framebuffer for Matrox devices on
Alpha, Intel and PPC boxes.
Advantages:
* It provides a nice large console (128 cols + 48 lines with 1024x768)
without using tiny, unreadable fonts.
* You can run XF{68,86}_FBDev or XFree86 fbdev driver on top of /dev/fb0
* Most important: boot logo :-)
Disadvantages:
* graphic mode is slower than text mode... but you should not notice
if you use same resolution as you used in textmode.
How to use it?
==============
Switching modes is done using the video=matroxfb:vesa:... boot parameter
or using `fbset' program.
If you want, for example, enable a resolution of 1280x1024x24bpp you should
pass to the kernel this command line: "video=matroxfb:vesa:0x1BB".
You should compile in both vgacon (to boot if you remove you Matrox from
box) and matroxfb (for graphics mode). You should not compile-in vesafb
unless you have primary display on non-Matrox VBE2.0 device (see
Documentation/fb/vesafb.txt for details).
Currently supported video modes are (through vesa:... interface, PowerMac
has [as addon] compatibility code):
[Graphic modes]
bpp | 640x400 640x480 768x576 800x600 960x720
----+--------------------------------------------
4 | 0x12 0x102
8 | 0x100 0x101 0x180 0x103 0x188
15 | 0x110 0x181 0x113 0x189
16 | 0x111 0x182 0x114 0x18A
24 | 0x1B2 0x184 0x1B5 0x18C
32 | 0x112 0x183 0x115 0x18B
[Graphic modes (continued)]
bpp | 1024x768 1152x864 1280x1024 1408x1056 1600x1200
----+------------------------------------------------
4 | 0x104 0x106
8 | 0x105 0x190 0x107 0x198 0x11C
15 | 0x116 0x191 0x119 0x199 0x11D
16 | 0x117 0x192 0x11A 0x19A 0x11E
24 | 0x1B8 0x194 0x1BB 0x19C 0x1BF
32 | 0x118 0x193 0x11B 0x19B
[Text modes]
text | 640x400 640x480 1056x344 1056x400 1056x480
-----+------------------------------------------------
8x8 | 0x1C0 0x108 0x10A 0x10B 0x10C
8x16 | 2, 3, 7 0x109
You can enter these number either hexadecimal (leading `0x') or decimal
(0x100 = 256). You can also use value + 512 to achieve compatibility
with your old number passed to vesafb.
Non-listed number can be achieved by more complicated command-line, for
example 1600x1200x32bpp can be specified by `video=matroxfb:vesa:0x11C,depth:32'.
X11
===
XF{68,86}_FBDev should work just fine, but it is non-accelerated. On non-intel
architectures there are some glitches for 24bpp videomodes. 8, 16 and 32bpp
works fine.
Running another (accelerated) X-Server like XF86_SVGA works too. But (at least)
XFree servers have big troubles in multihead configurations (even on first
head, not even talking about second). Running XFree86 4.x accelerated mga
driver is possible, but you must not enable DRI - if you do, resolution and
color depth of your X desktop must match resolution and color depths of your
virtual consoles, otherwise X will corrupt accelerator settings.
SVGALib
=======
Driver contains SVGALib compatibility code. It is turned on by choosing textual
mode for console. You can do it at boot time by using videomode
2,3,7,0x108-0x10C or 0x1C0. At runtime, `fbset -depth 0' does this work.
Unfortunately, after SVGALib application exits, screen contents is corrupted.
Switching to another console and back fixes it. I hope that it is SVGALib's
problem and not mine, but I'm not sure.
Configuration
=============
You can pass kernel command line options to matroxfb with
`video=matroxfb:option1,option2:value2,option3' (multiple options should be
separated by comma, values are separated from options by `:').
Accepted options:
mem:X - size of memory (X can be in megabytes, kilobytes or bytes)
You can only decrease value determined by driver because of
it always probe for memory. Default is to use whole detected
memory usable for on-screen display (i.e. max. 8 MB).
disabled - do not load driver; you can use also `off', but `disabled'
is here too.
enabled - load driver, if you have `video=matroxfb:disabled' in LILO
configuration, you can override it by this (you cannot override
`off'). It is default.
noaccel - do not use acceleration engine. It does not work on Alphas.
accel - use acceleration engine. It is default.
nopan - create initial consoles with vyres = yres, thus disabling virtual
scrolling.
pan - create initial consoles as tall as possible (vyres = memory/vxres).
It is default.
nopciretry - disable PCI retries. It is needed for some broken chipsets,
it is autodetected for intel's 82437. In this case device does
not comply to PCI 2.1 specs (it will not guarantee that every
transaction terminate with success or retry in 32 PCLK).
pciretry - enable PCI retries. It is default, except for intel's 82437.
novga - disables VGA I/O ports. It is default if BIOS did not enable device.
You should not use this option, some boards then do not restart
without power off.
vga - preserve state of VGA I/O ports. It is default. Driver does not
enable VGA I/O if BIOS did not it (it is not safe to enable it in
most cases).
nobios - disables BIOS ROM. It is default if BIOS did not enable BIOS itself.
You should not use this option, some boards then do not restart
without power off.
bios - preserve state of BIOS ROM. It is default. Driver does not enable
BIOS if BIOS was not enabled before.
noinit - tells driver, that devices were already initialized. You should use
it if you have G100 and/or if driver cannot detect memory, you see
strange pattern on screen and so on. Devices not enabled by BIOS
are still initialized. It is default.
init - driver initializes every device it knows about.
memtype - specifies memory type, implies 'init'. This is valid only for G200
and G400 and has following meaning:
G200: 0 -> 2x128Kx32 chips, 2MB onboard, probably sgram
1 -> 2x128Kx32 chips, 4MB onboard, probably sgram
2 -> 2x256Kx32 chips, 4MB onboard, probably sgram
3 -> 2x256Kx32 chips, 8MB onboard, probably sgram
4 -> 2x512Kx16 chips, 8/16MB onboard, probably sdram only
5 -> same as above
6 -> 4x128Kx32 chips, 4MB onboard, probably sgram
7 -> 4x128Kx32 chips, 8MB onboard, probably sgram
G400: 0 -> 2x512Kx16 SDRAM, 16/32MB
2x512Kx32 SGRAM, 16/32MB
1 -> 2x256Kx32 SGRAM, 8/16MB
2 -> 4x128Kx32 SGRAM, 8/16MB
3 -> 4x512Kx32 SDRAM, 32MB
4 -> 4x256Kx32 SGRAM, 16/32MB
5 -> 2x1Mx32 SDRAM, 32MB
6 -> reserved
7 -> reserved
You should use sdram or sgram parameter in addition to memtype
parameter.
nomtrr - disables write combining on frame buffer. This slows down driver but
there is reported minor incompatibility between GUS DMA and XFree
under high loads if write combining is enabled (sound dropouts).
mtrr - enables write combining on frame buffer. It speeds up video accesses
much. It is default. You must have MTRR support enabled in kernel
and your CPU must have MTRR (f.e. Pentium II have them).
sgram - tells to driver that you have Gxx0 with SGRAM memory. It has no
effect without `init'.
sdram - tells to driver that you have Gxx0 with SDRAM memory.
It is a default.
inv24 - change timings parameters for 24bpp modes on Millennium and
Millennium II. Specify this if you see strange color shadows around
characters.
noinv24 - use standard timings. It is the default.
inverse - invert colors on screen (for LCD displays)
noinverse - show true colors on screen. It is default.
dev:X - bind driver to device X. Driver numbers device from 0 up to N,
where device 0 is first `known' device found, 1 second and so on.
lspci lists devices in this order.
Default is `every' known device.
nohwcursor - disables hardware cursor (use software cursor instead).
hwcursor - enables hardware cursor. It is default. If you are using
non-accelerated mode (`noaccel' or `fbset -accel false'), software
cursor is used (except for text mode).
noblink - disables cursor blinking. Cursor in text mode always blinks (hw
limitation).
blink - enables cursor blinking. It is default.
nofastfont - disables fastfont feature. It is default.
fastfont:X - enables fastfont feature. X specifies size of memory reserved for
font data, it must be >= (fontwidth*fontheight*chars_in_font)/8.
It is faster on Gx00 series, but slower on older cards.
grayscale - enable grayscale summing. It works in PSEUDOCOLOR modes (text,
4bpp, 8bpp). In DIRECTCOLOR modes it is limited to characters
displayed through putc/putcs. Direct accesses to framebuffer
can paint colors.
nograyscale - disable grayscale summing. It is default.
cross4MB - enables that pixel line can cross 4MB boundary. It is default for
non-Millennium.
nocross4MB - pixel line must not cross 4MB boundary. It is default for
Millennium I or II, because of these devices have hardware
limitations which do not allow this. But this option is
incompatible with some (if not all yet released) versions of
XF86_FBDev.
dfp - enables digital flat panel interface. This option is incompatible with
secondary (TV) output - if DFP is active, TV output must be
inactive and vice versa. DFP always uses same timing as primary
(monitor) output.
dfp:X - use settings X for digital flat panel interface. X is number from
0 to 0xFF, and meaning of each individual bit is described in
G400 manual, in description of DAC register 0x1F. For normal operation
you should set all bits to zero, except lowest bit. This lowest bit
selects who is source of display clocks, whether G400, or panel.
Default value is now read back from hardware - so you should specify
this value only if you are also using `init' parameter.
outputs:XYZ - set mapping between CRTC and outputs. Each letter can have value
of 0 (for no CRTC), 1 (CRTC1) or 2 (CRTC2), and first letter corresponds
to primary analog output, second letter to the secondary analog output
and third letter to the DVI output. Default setting is 100 for
cards below G400 or G400 without DFP, 101 for G400 with DFP, and
111 for G450 and G550. You can set mapping only on first card,
use matroxset for setting up other devices.
vesa:X - selects startup videomode. X is number from 0 to 0x1FF, see table
above for detailed explanation. Default is 640x480x8bpp if driver
has 8bpp support. Otherwise first available of 640x350x4bpp,
640x480x15bpp, 640x480x24bpp, 640x480x32bpp or 80x25 text
(80x25 text is always available).
If you are not satisfied with videomode selected by `vesa' option, you
can modify it with these options:
xres:X - horizontal resolution, in pixels. Default is derived from `vesa'
option.
yres:X - vertical resolution, in pixel lines. Default is derived from `vesa'
option.
upper:X - top boundary: lines between end of VSYNC pulse and start of first
pixel line of picture. Default is derived from `vesa' option.
lower:X - bottom boundary: lines between end of picture and start of VSYNC
pulse. Default is derived from `vesa' option.
vslen:X - length of VSYNC pulse, in lines. Default is derived from `vesa'
option.
left:X - left boundary: pixels between end of HSYNC pulse and first pixel.
Default is derived from `vesa' option.
right:X - right boundary: pixels between end of picture and start of HSYNC
pulse. Default is derived from `vesa' option.
hslen:X - length of HSYNC pulse, in pixels. Default is derived from `vesa'
option.
pixclock:X - dotclocks, in ps (picoseconds). Default is derived from `vesa'
option and from `fh' and `fv' options.
sync:X - sync. pulse - bit 0 inverts HSYNC polarity, bit 1 VSYNC polarity.
If bit 3 (value 0x08) is set, composite sync instead of HSYNC is
generated. If bit 5 (value 0x20) is set, sync on green is turned on.
Do not forget that if you want sync on green, you also probably
want composite sync.
Default depends on `vesa'.
depth:X - Bits per pixel: 0=text, 4,8,15,16,24 or 32. Default depends on
`vesa'.
If you know capabilities of your monitor, you can specify some (or all) of
`maxclk', `fh' and `fv'. In this case, `pixclock' is computed so that
pixclock <= maxclk, real_fh <= fh and real_fv <= fv.
maxclk:X - maximum dotclock. X can be specified in MHz, kHz or Hz. Default is
`don't care'.
fh:X - maximum horizontal synchronization frequency. X can be specified
in kHz or Hz. Default is `don't care'.
fv:X - maximum vertical frequency. X must be specified in Hz. Default is
70 for modes derived from `vesa' with yres <= 400, 60Hz for
yres > 400.
Limitations
===========
There are known and unknown bugs, features and misfeatures.
Currently there are following known bugs:
+ SVGALib does not restore screen on exit
+ generic fbcon-cfbX procedures do not work on Alphas. Due to this,
`noaccel' (and cfb4 accel) driver does not work on Alpha. So everyone
with access to /dev/fb* on Alpha can hang machine (you should restrict
access to /dev/fb* - everyone with access to this device can destroy
your monitor, believe me...).
+ 24bpp does not support correctly XF-FBDev on big-endian architectures.
+ interlaced text mode is not supported; it looks like hardware limitation,
but I'm not sure.
+ Gxx0 SGRAM/SDRAM is not autodetected.
+ If you are using more than one framebuffer device, you must boot kernel
with 'video=scrollback:0'.
+ maybe more...
And following misfeatures:
+ SVGALib does not restore screen on exit.
+ pixclock for text modes is limited by hardware to
83 MHz on G200
66 MHz on Millennium I
60 MHz on Millennium II
Because I have no access to other devices, I do not know specific
frequencies for them. So driver does not check this and allows you to
set frequency higher that this. It causes sparks, black holes and other
pretty effects on screen. Device was not destroyed during tests. :-)
+ my Millennium G200 oscillator has frequency range from 35 MHz to 380 MHz
(and it works with 8bpp on about 320 MHz dotclocks (and changed mclk)).
But Matrox says on product sheet that VCO limit is 50-250 MHz, so I believe
them (maybe that chip overheats, but it has a very big cooler (G100 has
none), so it should work).
+ special mixed video/graphics videomodes of Mystique and Gx00 - 2G8V16 and
G16V16 are not supported
+ color keying is not supported
+ feature connector of Mystique and Gx00 is set to VGA mode (it is disabled
by BIOS)
+ DDC (monitor detection) is supported through dualhead driver
+ some check for input values are not so strict how it should be (you can
specify vslen=4000 and so on).
+ maybe more...
And following features:
+ 4bpp is available only on Millennium I and Millennium II. It is hardware
limitation.
+ selection between 1:5:5:5 and 5:6:5 16bpp videomode is done by -rgba
option of fbset: "fbset -depth 16 -rgba 5,5,5" selects 1:5:5:5, anything
else selects 5:6:5 mode.
+ text mode uses 6 bit VGA palette instead of 8 bit (one of 262144 colors
instead of one of 16M colors). It is due to hardware limitation of
Millennium I/II and SVGALib compatibility.
Benchmarks
==========
It is time to redraw whole screen 1000 times in 1024x768, 60Hz. It is
time for draw 6144000 characters on screen through /dev/vcsa
(for 32bpp it is about 3GB of data (exactly 3000 MB); for 8x16 font in
16 seconds, i.e. 187 MBps).
Times were obtained from one older version of driver, now they are about 3%
faster, it is kernel-space only time on P-II/350 MHz, Millennium I in 33 MHz
PCI slot, G200 in AGP 2x slot. I did not test vgacon.
NOACCEL
8x16 12x22
Millennium I G200 Millennium I G200
8bpp 16.42 9.54 12.33 9.13
16bpp 21.00 15.70 19.11 15.02
24bpp 36.66 36.66 35.00 35.00
32bpp 35.00 30.00 33.85 28.66
ACCEL, nofastfont
8x16 12x22 6x11
Millennium I G200 Millennium I G200 Millennium I G200
8bpp 7.79 7.24 13.55 7.78 30.00 21.01
16bpp 9.13 7.78 16.16 7.78 30.00 21.01
24bpp 14.17 10.72 18.69 10.24 34.99 21.01
32bpp 16.15 16.16 18.73 13.09 34.99 21.01
ACCEL, fastfont
8x16 12x22 6x11
Millennium I G200 Millennium I G200 Millennium I G200
8bpp 8.41 6.01 6.54 4.37 16.00 10.51
16bpp 9.54 9.12 8.76 6.17 17.52 14.01
24bpp 15.00 12.36 11.67 10.00 22.01 18.32
32bpp 16.18 18.29* 12.71 12.74 24.44 21.00
TEXT
8x16
Millennium I G200
TEXT 3.29 1.50
* Yes, it is slower than Millennium I.
Dualhead G400
=============
Driver supports dualhead G400 with some limitations:
+ secondary head shares videomemory with primary head. It is not problem
if you have 32MB of videoram, but if you have only 16MB, you may have
to think twice before choosing videomode (for example twice 1880x1440x32bpp
is not possible).
+ due to hardware limitation, secondary head can use only 16 and 32bpp
videomodes.
+ secondary head is not accelerated. There were bad problems with accelerated
XFree when secondary head used to use acceleration.
+ secondary head always powerups in 640x480@60-32 videomode. You have to use
fbset to change this mode.
+ secondary head always powerups in monitor mode. You have to use fbmatroxset
to change it to TV mode. Also, you must select at least 525 lines for
NTSC output and 625 lines for PAL output.
+ kernel is not fully multihead ready. So some things are impossible to do.
+ if you compiled it as module, you must insert i2c-matroxfb, matroxfb_maven
and matroxfb_crtc2 into kernel.
Dualhead G450
=============
Driver supports dualhead G450 with some limitations:
+ secondary head shares videomemory with primary head. It is not problem
if you have 32MB of videoram, but if you have only 16MB, you may have
to think twice before choosing videomode.
+ due to hardware limitation, secondary head can use only 16 and 32bpp
videomodes.
+ secondary head is not accelerated.
+ secondary head always powerups in 640x480@60-32 videomode. You have to use
fbset to change this mode.
+ TV output is not supported
+ kernel is not fully multihead ready, so some things are impossible to do.
+ if you compiled it as module, you must insert matroxfb_g450 and matroxfb_crtc2
into kernel.
--
Petr Vandrovec <vandrove@vc.cvut.cz>

8
Documentation/fb/metronomefb.txt → Documentation/fb/metronomefb.rst
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@ -1,6 +1,9 @@
Metronomefb
-----------
===========
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
@ -33,4 +36,3 @@ 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.

44
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@ -1,6 +1,6 @@
modedb default video mode support
=================================
modedb default video mode support
=================================
Currently all frame buffer device drivers have their own video mode databases,
@ -18,7 +18,7 @@ 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):
Valid mode specifiers (mode_option argument)::
<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
<name>[-<bpp>][@<refresh>]
@ -45,15 +45,18 @@ signals (e.g. HDMI and DVI-I). For other outputs it behaves like 'e'. If 'd'
is specified the output is disabled.
You can additionally specify which output the options matches to.
To force the VGA output to be enabled and drive a specific mode say:
To force the VGA output to be enabled and drive a specific mode say::
video=VGA-1:1280x1024@60me
Specifying the option multiple times for different ports is possible, e.g.:
Specifying the option multiple times for different ports is possible, e.g.::
video=LVDS-1:d video=HDMI-1:D
***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo *****
-----------------------------------------------------------------------------
What is the VESA(TM) Coordinated Video Timings (CVT)?
=====================================================
From the VESA(TM) Website:
@ -90,14 +93,14 @@ 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):
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
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
@ -110,15 +113,15 @@ Note: VESA(TM) has restrictions on what is a standard CVT timing:
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
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)
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.
@ -127,12 +130,13 @@ 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:
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.
There may be more modes::
Drivers that support modedb boot options
Boot Name Cards Supported

66
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@ -0,0 +1,66 @@
===============
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>

65
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@ -1,65 +0,0 @@
$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>

81
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@ -1,59 +1,82 @@
================================
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:
For example::
modprobe pxafb options=vmem:2M,mode:640x480-8,passive
or on the kernel command line
or on the kernel command line::
video=pxafb:vmem:2M,mode:640x480-8,passive
vmem: VIDEO_MEM_SIZE
Amount of video memory to allocate (can be suffixed with K or M
for kilobytes or megabytes)
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
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
@ -76,44 +99,50 @@ Overlay Support for PXA27x and later LCD controllers
not for such purpose).
2. overlay framebuffer is allocated dynamically according to specified
'struct fb_var_screeninfo', the amount is decided by:
'struct fb_var_screeninfo', the amount is decided by::
var->xres_virtual * var->yres_virtual * bpp
var->xres_virtual * var->yres_virtual * bpp
bpp = 16 -- for RGB565 or RGBT555
= 24 -- for YUV444 packed
= 24 -- for YUV444 planar
= 16 -- for YUV422 planar (1 pixel = 1 Y + 1/2 Cb + 1/2 Cr)
= 12 -- for YUV420 planar (1 pixel = 1 Y + 1/4 Cb + 1/4 Cr)
bpp = 24 -- for YUV444 packed
bpp = 24 -- for YUV444 planar
bpp = 16 -- for YUV422 planar (1 pixel = 1 Y + 1/2 Cb + 1/2 Cr)
bpp = 12 -- for YUV420 planar (1 pixel = 1 Y + 1/4 Cb + 1/4 Cr)
NOTE:
a. overlay does not support panning in x-direction, thus
var->xres_virtual will always be equal to var->xres
var->xres_virtual will always be equal to var->xres
b. line length of overlay(s) must be on a 32-bit word boundary,
for YUV planar modes, it is a requirement for the component
for YUV planar modes, it is a requirement for the component
with minimum bits per pixel, e.g. for YUV420, Cr component
for one pixel is actually 2-bits, it means the line length
should be a multiple of 16-pixels
c. starting horizontal position (XPOS) should start on a 32-bit
word boundary, otherwise the fb_check_var() will just fail.
word boundary, otherwise the fb_check_var() will just fail.
d. the rectangle of the overlay should be within the base plane,
otherwise fail
otherwise fail
Applications should follow the sequence below to operate an overlay
framebuffer:
a. open("/dev/fb[1-2]", ...)
a. open("/dev/fb[1-2]", ...)
b. ioctl(fd, FBIOGET_VSCREENINFO, ...)
c. modify 'var' with desired parameters:
1) var->xres and var->yres
2) larger var->yres_virtual if more memory is required,
usually for double-buffering
3) var->nonstd for starting (x, y) and color format
4) var->{red, green, blue, transp} if RGB mode is to be used
d. ioctl(fd, FBIOPUT_VSCREENINFO, ...)
e. ioctl(fd, FBIOGET_FSCREENINFO, ...)
f. mmap
@ -124,19 +153,21 @@ Overlay Support for PXA27x and later LCD controllers
and lengths of each component within the framebuffer.
4. var->nonstd is used to pass starting (x, y) position and color format,
the detailed bit fields are shown below:
the detailed bit fields are shown below::
31 23 20 10 0
+-----------------+---+----------+----------+
| ... unused ... |FOR| XPOS | YPOS |
+-----------------+---+----------+----------+
31 23 20 10 0
+-----------------+---+----------+----------+
| ... unused ... |FOR| XPOS | YPOS |
+-----------------+---+----------+----------+
FOR - color format, as defined by OVERLAY_FORMAT_* in pxafb.h
0 - RGB
1 - YUV444 PACKED
2 - YUV444 PLANAR
3 - YUV422 PLANAR
4 - YUR420 PLANAR
- 0 - RGB
- 1 - YUV444 PACKED
- 2 - YUV444 PLANAR
- 3 - YUV422 PLANAR
- 4 - YUR420 PLANAR
XPOS - starting horizontal position
YPOS - starting vertical position

8
Documentation/fb/s3fb.txt → Documentation/fb/s3fb.rst
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@ -1,6 +1,6 @@
s3fb - fbdev driver for S3 Trio/Virge chips
===========================================
===========================================
s3fb - fbdev driver for S3 Trio/Virge chips
===========================================
Supported Hardware
@ -56,7 +56,7 @@ Missing Features
(alias TODO list)
* secondary (not initialized by BIOS) device support
* big endian support
* big endian support
* Zorro bus support
* MMIO support
* 24 bpp mode support on more cards

23
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@ -1,17 +1,19 @@
[This file is cloned from VesaFB/matroxfb]
=================
What is sa1100fb?
=================
.. [This file is cloned from VesaFB/matroxfb]
This is a driver for a graphic framebuffer for the SA-1100 LCD
controller.
Configuration
==============
For most common passive displays, giving the option
For most common passive displays, giving the option::
video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
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
@ -27,13 +29,12 @@ sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
will probably be necessary.
Accepted options:
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)
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>

130
Documentation/fb/sh7760fb.rst Normal file
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@ -0,0 +1,130 @@
================================================
SH7760/SH7763 integrated LCDC Framebuffer driver
================================================
0. Overview
-----------
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.rst
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::
#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),
};

131
Documentation/fb/sh7760fb.txt
View File

@ -1,131 +0,0 @@
SH7760/SH7763 integrated LCDC Framebuffer driver
================================================
0. Overview
-----------
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 ======================================

40
Documentation/fb/sisfb.txt → Documentation/fb/sisfb.rst
View File

@ -1,4 +1,4 @@
==============
What is sisfb?
==============
@ -41,11 +41,11 @@ statement to add the parameters to the kernel command line. Please see lilo's
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:
lilo.conf::
append="video=sisfb:mode:1024x768x16,mem:12288,rate:75"
Example for sisfb as a module: Start sisfb by typing
Example for sisfb as a module: Start sisfb by typing::
modprobe sisfb mode=1024x768x16 rate=75 mem=12288
@ -57,7 +57,7 @@ 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:
arguments are separated with ",". For example::
video=sisfb:mode:1024x768x16,rate:75,mem:12288
@ -73,6 +73,7 @@ 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
@ -130,29 +131,30 @@ 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
========= ==================================================================
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
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
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".
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

7
Documentation/fb/sm501.txt → Documentation/fb/sm501.rst
View File

@ -1,6 +1,11 @@
=======
sm501fb
=======
Configuration:
You can pass the following kernel command line options to sm501 videoframebuffer:
You can pass the following kernel command line options to sm501
videoframebuffer::
sm501fb.bpp= SM501 Display driver:
Specify bits-per-pixel if not specified by 'mode'

18
Documentation/fb/sm712fb.txt → Documentation/fb/sm712fb.rst
View File

@ -1,5 +1,6 @@
================
What is sm712fb?
=================
================
This is a graphics framebuffer driver for Silicon Motion SM712 based processors.
@ -15,13 +16,16 @@ You should not compile-in vesafb.
Currently supported video modes are:
[Graphic modes]
Graphic modes
-------------
bpp | 640x480 800x600 1024x768 1280x1024
----+--------------------------------------------
8 | 0x301 0x303 0x305 0x307
16 | 0x311 0x314 0x317 0x31A
24 | 0x312 0x315 0x318 0x31B
=== ======= ======= ======== =========
bpp 640x480 800x600 1024x768 1280x1024
=== ======= ======= ======== =========
8 0x301 0x303 0x305 0x307
16 0x311 0x314 0x317 0x31A
24 0x312 0x315 0x318 0x31B
=== ======= ======= ======== =========
Missing Features
================

207
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@ -0,0 +1,207 @@
=====
sstfb
=====
Introduction
============
This is a frame buffer device driver for 3dfx' Voodoo Graphics
(aka voodoo 1, aka sst1) and Voodoo² (aka Voodoo 2, aka CVG) based
video boards. It's highly experimental code, but is guaranteed to work
on my computer, with my "Maxi Gamer 3D" and "Maxi Gamer 3d²" boards,
and with me "between chair and keyboard". Some people tested other
combinations and it seems that it works.
The main page is located at <http://sstfb.sourceforge.net>, and if
you want the latest version, check out the CVS, as the driver is a work
in progress, I feel uncomfortable with releasing tarballs of something
not completely working...Don't worry, it's still more than usable
(I eat my own dog food)
Please read the Bug section, and report any success or failure to me
(Ghozlane Toumi <gtoumi@laposte.net>).
BTW, If you have only one monitor , and you don't feel like playing
with the vga passthrou cable, I can only suggest borrowing a screen
somewhere...
Installation
============
This driver (should) work on ix86, with "late" 2.2.x kernel (tested
with x = 19) and "recent" 2.4.x kernel, as a module or compiled in.
It has been included in mainstream kernel since the infamous 2.4.10.
You can apply the patches found in `sstfb/kernel/*-2.{2|4}.x.patch`,
and copy sstfb.c to linux/drivers/video/, or apply a single patch,
`sstfb/patch-2.{2|4}.x-sstfb-yymmdd` to your linux source tree.
Then configure your kernel as usual: choose "m" or "y" to 3Dfx Voodoo
Graphics in section "console". Compile, install, have fun... and please
drop me a report :)
Module Usage
============
.. warning::
#. 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 ...
Ghozlane Toumi <gtoumi@laposte.net>
Date: 2002/05/09 20:11:45
http://sstfb.sourceforge.net/README

174
Documentation/fb/sstfb.txt
View File

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

26
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@ -1,15 +1,14 @@
$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)
- 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
@ -36,18 +35,21 @@ 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 `:').
`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.
========== ============================================================
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,
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

36
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@ -1,3 +1,7 @@
=========
Tridentfb
=========
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
@ -17,6 +21,7 @@ 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
@ -26,28 +31,30 @@ Known bugs:
How to use it?
==============
When booting you can pass the video parameter.
video=tridentfb
When booting you can pass the video parameter::
The parameters for tridentfb are concatenated with a ':' as in this example.
video=tridentfb
video=tridentfb:800x600-16@75,noaccel
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)
======== =====================================================================
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
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
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.
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
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
@ -56,12 +63,13 @@ memdiff - integer value in KB, should be nonzero if your card reports
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
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
bpp bits per pixel (8,16 or 32)
mode a mode name like 800x600-8@75 as described in
Documentation/fb/modedb.rst
======== =====================================================================
Using insane values for the above parameters will probably result in driver
misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or

55
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@ -1,6 +1,6 @@
==============
What is udlfb?
===============
==============
This is a driver for DisplayLink USB 2.0 era graphics chips.
@ -100,6 +100,7 @@ options udlfb fb_defio=0 console=1 shadow=1
Accepted boolean options:
=============== ================================================================
fb_defio Make use of the fb_defio (CONFIG_FB_DEFERRED_IO) kernel
module to track changed areas of the framebuffer by page faults.
Standard fbdev applications that use mmap but that do not
@ -109,7 +110,7 @@ fb_defio Make use of the fb_defio (CONFIG_FB_DEFERRED_IO) kernel
more stable, and higher performance.
default: fb_defio=1
console Allow fbcon to attach to udlfb provided framebuffers.
console Allow fbcon to attach to udlfb provided framebuffers.
Can be disabled if fbcon and other clients
(e.g. X with --shared-vt) are in conflict.
default: console=1
@ -119,6 +120,7 @@ shadow Allocate a 2nd framebuffer to shadow what's currently across
do not transmit. Spends host memory to save USB transfers.
Enabled by default. Only disable on very low memory systems.
default: shadow=1
=============== ================================================================
Sysfs Attributes
================
@ -126,34 +128,35 @@ Sysfs Attributes
Udlfb creates several files in /sys/class/graphics/fb?
Where ? is the sequential framebuffer id of the particular DisplayLink device
edid If a valid EDID blob is written to this file (typically
by a udev rule), then udlfb will use this EDID as a
backup in case reading the actual EDID of the monitor
attached to the DisplayLink device fails. This is
especially useful for fixed panels, etc. that cannot
communicate their capabilities via EDID. Reading
this file returns the current EDID of the attached
monitor (or last backup value written). This is
useful to get the EDID of the attached monitor,
which can be passed to utilities like parse-edid.
======================== ========================================================
edid If a valid EDID blob is written to this file (typically
by a udev rule), then udlfb will use this EDID as a
backup in case reading the actual EDID of the monitor
attached to the DisplayLink device fails. This is
especially useful for fixed panels, etc. that cannot
communicate their capabilities via EDID. Reading
this file returns the current EDID of the attached
monitor (or last backup value written). This is
useful to get the EDID of the attached monitor,
which can be passed to utilities like parse-edid.
metrics_bytes_rendered 32-bit count of pixel bytes rendered
metrics_bytes_rendered 32-bit count of pixel bytes rendered
metrics_bytes_identical 32-bit count of how many of those bytes were found to be
unchanged, based on a shadow framebuffer check
metrics_bytes_identical 32-bit count of how many of those bytes were found to be
unchanged, based on a shadow framebuffer check
metrics_bytes_sent 32-bit count of how many bytes were transferred over
USB to communicate the resulting changed pixels to the
hardware. Includes compression and protocol overhead
metrics_bytes_sent 32-bit count of how many bytes were transferred over
USB to communicate the resulting changed pixels to the
hardware. Includes compression and protocol overhead
metrics_cpu_kcycles_used 32-bit count of CPU cycles used in processing the
above pixels (in thousands of cycles).
above pixels (in thousands of cycles).
metrics_reset Write-only. Any write to this file resets all metrics
above to zero. Note that the 32-bit counters above
roll over very quickly. To get reliable results, design
performance tests to start and finish in a very short
period of time (one minute or less is safe).
metrics_reset Write-only. Any write to this file resets all metrics
above to zero. Note that the 32-bit counters above
roll over very quickly. To get reliable results, design
performance tests to start and finish in a very short
period of time (one minute or less is safe).
======================== ========================================================
--
Bernie Thompson <bernie@plugable.com>

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@ -1,4 +1,4 @@
==========================================================
uvesafb - A Generic Driver for VBE2+ compliant video cards
==========================================================
@ -49,7 +49,7 @@ The most important limitations are:
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.:
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)
@ -57,85 +57,90 @@ are either given on the kernel command line or as module parameters, e.g.:
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. This option is available on x86
only and is the default option on that architecture.
interface. The visible screen is just a window of the
video memory, console scrolling is done by changing the
start of the window. This option is available on x86
only and is the default option on that architecture.
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.
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 default on non-x86.
is the default on non-x86.
======= =========================================================
(If you're using uvesafb as a module, the above three options are
used a parameter of the scroll option, e.g. scroll=ypan.)
used a parameter of the scroll option, e.g. scroll=ypan.)
vgapal Use the standard VGA registers for palette changes.
=========== ====================================================================
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.
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)
3 - write-combining (default)
mtrr:n Setup memory type range registers for the framebuffer
where n:
Values other than 0 and 3 will result in a warning and will be
treated just like 3.
- 0 - disabled (equivalent to nomtrr)
- 3 - write-combining (default)
nomtrr Do not use memory type range registers.
Values other than 0 and 3 will result in a warning and will be
treated just like 3.
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.
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).
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.
<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.
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).
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.
noedid Do not try to fetch and use EDID-provided modes.
noblank Disable hardware blanking.
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".
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
----------------------
@ -146,27 +151,26 @@ additional information.
Driver attributes:
/sys/bus/platform/drivers/uvesafb
- v86d (default: /sbin/v86d)
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
nocrtc
Use the default refresh rate (60 Hz) if set to 1.
- oem_product_name
- oem_product_rev
- oem_string
- oem_vendor
oem_product_name, oem_product_rev, oem_string, oem_vendor
Information about the card and its maker.
- vbe_modes
vbe_modes
A list of video modes supported by the Video BIOS along with their
VBE mode numbers in hex.
- vbe_version
vbe_version
A BCD value indicating the implemented VBE standard.
5. Miscellaneous
@ -176,9 +180,9 @@ 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: 2017-10-10
Documentation of the uvesafb options is loosely based on vesafb.txt.

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@ -1,4 +1,4 @@
===============
What is vesafb?
===============
@ -40,26 +40,31 @@ 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
====== ======= ======= ======== =========
colors 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.
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
====== ======= ======= ======== =========
colors 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
@ -73,9 +78,9 @@ 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.
"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.
if you set the 0x in front of the numbers.
X11
===
@ -120,61 +125,67 @@ Accepted options:
inverse use inverse color map
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
========= ======================================================================
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
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.
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.
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.
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
mtrr:n Setup memory type range registers for the vesafb framebuffer
where n:
If you see the following in dmesg, choose the type that matches the
old one. In this example, use "mtrr:2".
- 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
mtrr: type mismatch for e0000000,8000000 old: write-back new:
write-combining
...
nomtrr disable mtrr
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)
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).
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

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@ -0,0 +1,297 @@
=======================================================
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, VX855)
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 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_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.
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
Configure viafb via /proc
-------------------------
The following files exist in /proc/viafb
supported_output_devices
This read-only file contains a full ',' separated list containing all
output devices that could be available on your platform. It is likely
that not all of those have a connector on your hardware but it should
provide a good starting point to figure out which of those names match
a real connector.
Example::
# cat /proc/viafb/supported_output_devices
iga1/output_devices, iga2/output_devices
These two files are readable and writable. iga1 and iga2 are the two
independent units that produce the screen image. Those images can be
forwarded to one or more output devices. Reading those files is a way
to query which output devices are currently used by an iga.
Example::
# cat /proc/viafb/iga1/output_devices
If there are no output devices printed the output of this iga is lost.
This can happen for example if only one (the other) iga is used.
Writing to these files allows adjusting the output devices during
runtime. One can add new devices, remove existing ones or switch
between igas. Essentially you can write a ',' separated list of device
names (or a single one) in the same format as the output to those
files. You can add a '+' or '-' as a prefix allowing simple addition
and removal of devices. So a prefix '+' adds the devices from your list
to the already existing ones, '-' removes the listed devices from the
existing ones and if no prefix is given it replaces all existing ones
with the listed ones. If you remove devices they are expected to turn
off. If you add devices that are already part of the other iga they are
removed there and added to the new one.
Examples:
Add CRT as output device to iga1::
# echo +CRT > /proc/viafb/iga1/output_devices
Remove (turn off) DVP1 and LVDS1 as output devices of iga2::
# echo -DVP1,LVDS1 > /proc/viafb/iga2/output_devices
Replace all iga1 output devices by CRT::
# echo CRT > /proc/viafb/iga1/output_devices
Bootup with viafb
-----------------
Add the following line to your grub.conf::
append = "video=viafb:viafb_mode=1024x768,viafb_bpp=32,viafb_refresh=85"
VIA Framebuffer modes
=====================
.. include:: viafb.modes
:literal:

252
Documentation/fb/viafb.txt
View File

@ -1,252 +0,0 @@
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, VX855)
[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 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_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.
[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
[Configure viafb via /proc]
---------------------------
The following files exist in /proc/viafb
supported_output_devices
This read-only file contains a full ',' separated list containing all
output devices that could be available on your platform. It is likely
that not all of those have a connector on your hardware but it should
provide a good starting point to figure out which of those names match
a real connector.
Example:
# cat /proc/viafb/supported_output_devices
iga1/output_devices
iga2/output_devices
These two files are readable and writable. iga1 and iga2 are the two
independent units that produce the screen image. Those images can be
forwarded to one or more output devices. Reading those files is a way
to query which output devices are currently used by an iga.
Example:
# cat /proc/viafb/iga1/output_devices
If there are no output devices printed the output of this iga is lost.
This can happen for example if only one (the other) iga is used.
Writing to these files allows adjusting the output devices during
runtime. One can add new devices, remove existing ones or switch
between igas. Essentially you can write a ',' separated list of device
names (or a single one) in the same format as the output to those
files. You can add a '+' or '-' as a prefix allowing simple addition
and removal of devices. So a prefix '+' adds the devices from your list
to the already existing ones, '-' removes the listed devices from the
existing ones and if no prefix is given it replaces all existing ones
with the listed ones. If you remove devices they are expected to turn
off. If you add devices that are already part of the other iga they are
removed there and added to the new one.
Examples:
Add CRT as output device to iga1
# echo +CRT > /proc/viafb/iga1/output_devices
Remove (turn off) DVP1 and LVDS1 as output devices of iga2
# echo -DVP1,LVDS1 > /proc/viafb/iga2/output_devices
Replace all iga1 output devices by CRT
# echo CRT > /proc/viafb/iga1/output_devices
[Bootup with viafb]:
--------------------
Add the following line to your grub.conf:
append = "video=viafb:viafb_mode=1024x768,viafb_bpp=32,viafb_refresh=85"

10
Documentation/fb/vt8623fb.txt → Documentation/fb/vt8623fb.rst
View File

@ -1,13 +1,13 @@
vt8623fb - fbdev driver for graphics core in VIA VT8623 chipset
===============================================================
===============================================================
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)
VIA VT8623 [CLE266] chipset and its graphics core
(known as CastleRock or Unichrome)
I tested vt8623fb on VIA EPIA ML-6000

10
MAINTAINERS
View File

@ -4789,7 +4789,7 @@ S: Maintained
W: http://plugable.com/category/projects/udlfb/
F: drivers/video/fbdev/udlfb.c
F: include/video/udlfb.h
F: Documentation/fb/udlfb.txt
F: Documentation/fb/udlfb.rst
DISTRIBUTED LOCK MANAGER (DLM)
M: Christine Caulfield <ccaulfie@redhat.com>
@ -7923,7 +7923,7 @@ INTEL FRAMEBUFFER DRIVER (excluding 810 and 815)
M: Maik Broemme <mbroemme@libmpq.org>
L: linux-fbdev@vger.kernel.org
S: Maintained
F: Documentation/fb/intelfb.txt
F: Documentation/fb/intelfb.rst
F: drivers/video/fbdev/intelfb/
INTEL GPIO DRIVERS
@ -14350,7 +14350,7 @@ M: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
L: linux-fbdev@vger.kernel.org
S: Maintained
F: drivers/video/fbdev/sm712*
F: Documentation/fb/sm712fb.txt
F: Documentation/fb/sm712fb.rst
SIMPLE FIRMWARE INTERFACE (SFI)
M: Len Brown <lenb@kernel.org>
@ -14420,7 +14420,7 @@ SIS FRAMEBUFFER DRIVER
M: Thomas Winischhofer <thomas@winischhofer.net>
W: http://www.winischhofer.net/linuxsisvga.shtml
S: Maintained
F: Documentation/fb/sisfb.txt
F: Documentation/fb/sisfb.rst
F: drivers/video/fbdev/sis/
F: include/video/sisfb.h
@ -16608,7 +16608,7 @@ M: Michal Januszewski <spock@gentoo.org>
L: linux-fbdev@vger.kernel.org
W: https://github.com/mjanusz/v86d
S: Maintained
F: Documentation/fb/uvesafb.txt
F: Documentation/fb/uvesafb.rst
F: drivers/video/fbdev/uvesafb.*
VF610 NAND DRIVER

2
drivers/tty/Kconfig
View File

@ -95,7 +95,7 @@ config VT_HW_CONSOLE_BINDING
See <file:Documentation/console/console.txt> for more
information. For framebuffer console users, please refer to
<file:Documentation/fb/fbcon.txt>.
<file:Documentation/fb/fbcon.rst>.
config UNIX98_PTYS
bool "Unix98 PTY support" if EXPERT

24
drivers/video/fbdev/Kconfig
View File

@ -31,7 +31,7 @@ menuconfig FB
in the /dev directory, i.e. /dev/fb*.
You need an utility program called fbset to make full use of frame
buffer devices. Please read <file:Documentation/fb/framebuffer.txt>
buffer devices. Please read <file:Documentation/fb/framebuffer.rst>
and the Framebuffer-HOWTO at
<http://www.munted.org.uk/programming/Framebuffer-HOWTO-1.3.html> for more
information.
@ -241,7 +241,7 @@ config FB_CIRRUS
If you have a PCI-based system, this enables support for these
chips: GD-543x, GD-544x, GD-5480.
Please read the file <file:Documentation/fb/cirrusfb.txt>.
Please read the file <file:Documentation/fb/cirrusfb.rst>.
Say N unless you have such a graphics board or plan to get one
before you next recompile the kernel.
@ -614,7 +614,7 @@ config FB_UVESA
This driver generally provides more features than vesafb but
requires a userspace helper application called 'v86d'. See
<file:Documentation/fb/uvesafb.txt> for more information.
<file:Documentation/fb/uvesafb.rst> for more information.
If unsure, say N.
@ -629,7 +629,7 @@ config FB_VESA
This is the frame buffer device driver for generic VESA 2.0
compliant graphic cards. The older VESA 1.2 cards are not supported.
You will get a boot time penguin logo at no additional cost. Please
read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
read <file:Documentation/fb/vesafb.rst>. If unsure, say Y.
config FB_EFI
bool "EFI-based Framebuffer Support"
@ -825,7 +825,7 @@ config FB_PVR2
module load time. The parameters look like "video=pvr2:XXX", where
the meaning of XXX can be found at the end of the main source file
(<file:drivers/video/pvr2fb.c>). Please see the file
<file:Documentation/fb/pvr2fb.txt>.
<file:Documentation/fb/pvr2fb.rst>.
config FB_OPENCORES
tristate "OpenCores VGA/LCD core 2.0 framebuffer support"
@ -987,7 +987,7 @@ config FB_I810
module will be called i810fb.
For more information, please read
<file:Documentation/fb/intel810.txt>
<file:Documentation/fb/intel810.rst>
config FB_I810_GTF
bool "use VESA Generalized Timing Formula"
@ -1057,7 +1057,7 @@ config FB_INTEL
To compile this driver as a module, choose M here: the
module will be called intelfb.
For more information, please read <file:Documentation/fb/intelfb.txt>
For more information, please read <file:Documentation/fb/intelfb.rst>
config FB_INTEL_DEBUG
bool "Intel driver Debug Messages"
@ -1094,7 +1094,7 @@ config FB_MATROX
You can pass several parameters to the driver at boot time or at
module load time. The parameters look like "video=matroxfb:XXX", and
are described in <file:Documentation/fb/matroxfb.txt>.
are described in <file:Documentation/fb/matroxfb.rst>.
config FB_MATROX_MILLENIUM
bool "Millennium I/II support"
@ -1245,7 +1245,7 @@ config FB_ATY128
help
This driver supports graphics boards with the ATI Rage128 chips.
Say Y if you have such a graphics board and read
<file:Documentation/fb/aty128fb.txt>.
<file:Documentation/fb/aty128fb.rst>.
To compile this driver as a module, choose M here: the
module will be called aty128fb.
@ -1507,7 +1507,7 @@ config FB_VOODOO1
WARNING: Do not use any application that uses the 3D engine
(namely glide) while using this driver.
Please read the <file:Documentation/fb/sstfb.txt> for supported
Please read the <file:Documentation/fb/sstfb.rst> for supported
options and other important info support.
config FB_VT8623
@ -1539,7 +1539,7 @@ config FB_TRIDENT
There are also integrated versions of these chips called CyberXXXX,
CyberImage or CyberBlade. These chips are mostly found in laptops
but also on some motherboards including early VIA EPIA motherboards.
For more information, read <file:Documentation/fb/tridentfb.txt>
For more information, read <file:Documentation/fb/tridentfb.rst>
Say Y if you have such a graphics board.
@ -1778,7 +1778,7 @@ config FB_PXA_PARAMETERS
single model of flatpanel then you can safely leave this
option disabled.
<file:Documentation/fb/pxafb.txt> describes the available parameters.
<file:Documentation/fb/pxafb.rst> describes the available parameters.
config PXA3XX_GCU
tristate "PXA3xx 2D graphics accelerator driver"

2
drivers/video/fbdev/matrox/matroxfb_base.c
View File

@ -2502,7 +2502,7 @@ MODULE_PARM_DESC(nobios, "Disables ROM BIOS (0 or 1=disabled) (default=do not ch
module_param(noinit, int, 0);
MODULE_PARM_DESC(noinit, "Disables W/SG/SD-RAM and bus interface initialization (0 or 1=do not initialize) (default=0)");
module_param(memtype, int, 0);
MODULE_PARM_DESC(memtype, "Memory type for G200/G400 (see Documentation/fb/matroxfb.txt for explanation) (default=3 for G200, 0 for G400)");
MODULE_PARM_DESC(memtype, "Memory type for G200/G400 (see Documentation/fb/matroxfb.rst for explanation) (default=3 for G200, 0 for G400)");
module_param(mtrr, int, 0);
MODULE_PARM_DESC(mtrr, "This speeds up video memory accesses (0=disabled or 1) (default=1)");
module_param(sgram, int, 0);

2
drivers/video/fbdev/pxafb.c
View File

@ -2068,7 +2068,7 @@ static int __init pxafb_setup_options(void)
#define pxafb_setup_options() (0)
module_param_string(options, g_options, sizeof(g_options), 0);
MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)");
MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.rst)");
#endif
#else

2
drivers/video/fbdev/sh7760fb.c
View File

@ -6,7 +6,7 @@
* Manuel Lauss <mano@roarinelk.homelinux.net>
* (c) 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
*
* PLEASE HAVE A LOOK AT Documentation/fb/sh7760fb.txt!
* PLEASE HAVE A LOOK AT Documentation/fb/sh7760fb.rst!
*
* Thanks to Siegfried Schaefer <s.schaefer at schaefer-edv.de>
* for his original source and testing!