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[PATCH] i810fb: Update i810fb documentation

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Update i810fb documentation to describe new features and configuration
changes.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Antonino A. Daplas 2005-09-12 09:18:12 +08:00 committed by Linus Torvalds
parent 747a5054c0
commit c93a777103
1 changed files with 30 additions and 26 deletions
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56
Documentation/fb/intel810.txt
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@ -5,6 +5,7 @@ Intel 810/815 Framebuffer driver
March 17, 2002
First Released: July 2001
Last Update: September 12, 2005
================================================================
A. Introduction
@ -44,6 +45,8 @@ B. Features
- Hardware Cursor Support
- Supports EDID probing either by DDC/I2C or through the BIOS
C. List of available options
a. "video=i810fb"
@ -52,14 +55,17 @@ C. List of available options
Recommendation: required
b. "xres:<value>"
select horizontal resolution in pixels
select horizontal resolution in pixels. (This parameter will be
ignored if 'mode_option' is specified. See 'o' below).
Recommendation: user preference
(default = 640)
c. "yres:<value>"
select vertical resolution in scanlines. If Discrete Video Timings
is enabled, this will be ignored and computed as 3*xres/4.
is enabled, this will be ignored and computed as 3*xres/4. (This
parameter will be ignored if 'mode_option' is specified. See 'o'
below)
Recommendation: user preference
(default = 480)
@ -86,7 +92,8 @@ C. List of available options
g. "hsync1/hsync2:<value>"
select the minimum and maximum Horizontal Sync Frequency of the
monitor in KHz. If a using a fixed frequency monitor, hsync1 must
be equal to hsync2.
be equal to hsync2. If EDID probing is successful, these will be
ignored and values will be taken from the EDID block.
Recommendation: check monitor manual for correct values
default (29/30)
@ -94,7 +101,8 @@ C. List of available options
h. "vsync1/vsync2:<value>"
select the minimum and maximum Vertical Sync Frequency of the monitor
in Hz. You can also use this option to lock your monitor's refresh
rate.
rate. If EDID probing is successful, these will be ignored and values
will be taken from the EDID block.
Recommendation: check monitor manual for correct values
(default = 60/60)
@ -154,7 +162,11 @@ C. List of available options
Recommendation: do not set
(default = not set)
o. <xres>x<yres>[-<bpp>][@<refresh>]
The driver will now accept specification of boot mode option. If this
is specified, the options 'xres' and 'yres' will be ignored. See
Documentation/fb/modedb.txt for usage.
D. Kernel booting
Separate each option/option-pair by commas (,) and the option from its value
@ -176,7 +188,10 @@ 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.
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
@ -217,32 +232,21 @@ F. Setup
This is required. The option is under "Character Devices"
d. Under "Graphics Support", select "Intel 810/815" either statically
or as a module. Choose "use VESA GTF for video timings" if you
need to maximize the capability of your display. To be on the
or as a module. Choose "use VESA Generalized Timing Formula" if
you need to maximize the capability of your display. To be on the
safe side, you can leave this unselected.
e. If you want a framebuffer console, enable it under "Console
e. If you want support for DDC/I2C probing (Plug and Play Displays),
set 'Enable DDC Support' to 'y'. To make this option appear, set
'use VESA Generalized Timing Formula' to 'y'.
f. If you want a framebuffer console, enable it under "Console
Drivers"
f. Compile your kernel.
g. Compile your kernel.
g. Load the driver as described in section D and E.
h. Load the driver as described in section D and E.
Optional:
h. If you are going to run XFree86 with its native drivers, the
standard XFree86 4.1.0 and 4.2.0 drivers should work as is.
However, there's a bug in the XFree86 i810 drivers. It attempts
to use XAA even when switched to the console. This will crash
your server. I have a fix at this site:
http://i810fb.sourceforge.net.
You can either use the patch, or just replace
/usr/X11R6/lib/modules/drivers/i810_drv.o
with the one provided at the website.
i. Try the DirectFB (http://www.directfb.org) + the i810 gfxdriver
patch to see the chipset in action (or inaction :-).