chips - Chips and Technologies video driver
chips is an Xorg driver for Chips and Technologies video processors.
The majority of the Chips and Technologies chipsets are supported by
this driver. In general the limitation on the capabilities of this
driver are determined by the chipset on which it is run. Where
possible, this driver provides full acceleration and supports the
following depths: 1, 4, 8, 15, 16, 24 and on the latest chipsets an
8+16 overlay mode. All visual types are supported for depth 1, 4 and 8
and both TrueColor and DirectColor visuals are supported where
possible. Multi-head configurations are supported on PCI or AGP buses.
The chips driver supports video processors on most of the bus types
currently available. The chipsets supported fall into one of three
architectural classes. A basic architecture, the WinGine architecture
and the newer HiQV architecture.
The supported chipsets are ct65520, ct65525, ct65530, ct65535, ct65540,
ct65545, ct65546 and ct65548
Color depths 1, 4 and 8 are supported on all chipsets, while depths 15,
16 and 24 are supported only on the 65540, 65545, 65546 and 65548
chipsets. The driver is accelerated when used with the 65545, 65546 or
65548 chipsets, however the DirectColor visual is not available.
The supported chipsets are ct64200 and ct64300
Color depths 1, 4 and 8 are supported on both chipsets, while depths
15, 16 and 24 are supported only on the 64300 chipsets. The driver is
accelerated when used with the 64300 chipsets, however the DirectColor
visual is not available.
The supported chipsets are ct65550, ct65554, ct65555, ct68554, ct69000
Color depths 1, 4, 8, 15, 16, 24 and 8+16 are supported on all
chipsets. The DirectColor visual is supported on all color depths
except the 8+16 overlay mode. Full acceleration is supplied for all
Please refer to xorg.conf(5) for general configuration details. This
section only covers configuration details specific to this driver.
The driver auto-detects the chipset type, but the following ChipSet
names may optionally be specified in the config file "Device" section,
and will override the auto-detection:
"ct65520", "ct65525", "ct65530", "ct65535", "ct65540", "ct65545",
"ct65546", "ct65548", "ct65550", "ct65554", "ct65555", "ct68554",
"ct69000", "ct69030", "ct64200", "ct64300".
The driver will auto-detect the amount of video memory present for all
chipsets. But maybe overridden with the VideoRam entry in the config
file "Device" section.
The following driver Options are supported, on one or more of the
Option "NoAccel" "boolean"
Disable or enable acceleration. Default: acceleration is
Option "NoLinear" "boolean"
Disables linear addressing in cases where it is enabled by
default. Default: off
Option "Linear" "boolean"
Enables linear addressing in cases where it is disabled by
default. Default: off
Option "HWCursor" "boolean"
Enable or disable the HW cursor. Default: on.
Option "SWCursor" "boolean"
Enable or disable the SW cursor. Default: off.
Option "STN" "boolean"
Force detection of STN screen type. Default: off.
Option "UseModeline" "boolean"
Reprogram flat panel timings with values from the modeline.
Option "FixPanelSize" "boolean"
Reprogram flat panel size with values from the modeline.
Option "NoStretch" "boolean"
This option disables the stretching on a mode on a flat panel to
fill the screen. Default: off
Option "LcdCenter" "boolean"
Center the mode displayed on the flat panel on the screen.
Option "HWclocks" "boolean"
Force the use of fixed hardware clocks on chips that support
both fixed and programmable clocks. Default: off
Option "UseVclk1" "boolean"
Use the Vclk1 programmable clock on HiQV chipsets instead of
Vclk2. Default: off
Option "FPClock8" "float"
Option "FPClock16" "float"
Option "FPClock24" "float"
Option "FPClock32" "float"
Force the use of a particular video clock speed for use with the
flat panel at a specified depth
Option "MMIO" "boolean"
Force the use of memory mapped IO for acceleration registers.
Option "FullMMIO" "boolean"
Force the use of memory mapped IO where it can be used. Default:
Option "SuspendHack" "boolean"
Force driver to leave centering and stretching registers alone.
This can fix some laptop suspend/resume problems. Default: off
Enable 8+24 overlay mode. Only appropriate for depth 24.
Option "ColorKey" "integer"
Set the colormap index used for the transparency key for the
depth 8 plane when operating in 8+16 overlay mode. The value
must be in the range 2-255. Default: 255.
Option "VideoKey" "integer"
This sets the default pixel value for the YUV video overlay key.
Option "ShadowFB" "boolean"
Enable or disable use of the shadow framebuffer layer. Default:
Option "SyncOnGreen" "boolean"
Enable or disable combining the sync signals with the green
signal. Default: off.
Option "ShowCache" "boolean"
Enable or disable viewing offscreen memory. Used for debugging
only Default: off.
Option "18bitBus" "boolean"
Force the driver to assume that the flat panel has an 18bit data
bus. Default: off.
Option "Crt2Memory" "integer"
In a dual-head mode (69030 only) this option selects the amount
of memory to set aside for the second head. If not specified,
half the memory is used. Default: off.
Option "DualRefresh" "integer"
The 69030 supports independent refresh rates on its two display
channels. This mode of operations uses additional memory
bandwidth and thus limits the maximum colour depth and refresh
rate that can be achieved, and so is off by default. Using this
option forces the use of an independent refresh rate on the two
screens. Default: off.
Option "FpMode" "boolean"
The driver probes the chip to find out if a flat panel (LCD) is
connected and active. If this is true it limits the possible
screen size to the maximum resolution of the panel. The chips is
initialized by the BIOS which may set the chip to 'dual' mode
even if no panel is connected. In this case the available
resolution on the CRT is limited to the panel size the BIOS has
set. To tell the driver that no panel is connected despite of
what the BIOS is saying set this option to off. Don't set it to
off if a panel is connected. Default: value probed by BIOS.
Xorg(1), xorg.conf(5), Xserver(1), X(7)
You are also recommended to read the README.chips file that comes with
all Xorg distributions, which discusses the chips driver in more
Authors include: Jon Block, Mike Hollick, Regis Cridlig, Nozomi Ytow,
Egbert Eich, David Bateman and Xavier Ducoin