Table of Contents
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.
chipsets are ct65520, ct65525, ct65530, ct65535, ct65540, ct65545, ct65546
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
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 and ct69030
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 chipsets.
Please refer to xorg.conf(5)
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.
driver Options are supported, on one or more of the supported chipsets:
- Option "NoAccel" "boolean"
- Disable or enable acceleration. Default: acceleration
- Option "NoLinear" "boolean"
- Disables linear addressing in cases
where it is enabled by default. Default: off
- Option "Linear" "boolean"
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. Default: off
- Option "FixPanelSize" "boolean"
flat panel size with values from the modeline. Default: off
- Option "NoStretch"
- 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. Default: off
- Option "HWclocks"
- 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:
- Option "FPClock8" "float"
- Option "FPClock16" "float"
- Option "FPClock24"
- Option "FPClock32" "float"
- Force the use of a particular video
clock speed for use with the flat panel at a specified depth
- Option "MMIO"
- 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: off
- Option "SuspendHack" "boolean"
driver to leave centering and stretching registers alone. This can fix some
laptop suspend/resume problems. Default: off
- Option "Overlay"
- Enable 8+24
overlay mode. Only appropriate for depth 24. Default: off.
- Option "ColorKey"
- 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. Default: undefined.
- Enable or disable use of the shadow framebuffer layer.
- Option "SyncOnGreen" "boolean"
- Enable or disable combining
the sync signals with the green signal. Default: off.
- Option "ShowCache"
- 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"
- 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.
- 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
You are also recommended
to read the README.chips file that comes with all Xorg distributions, which
discusses the chips driver in more detail.
Authors include: Jon Block,
Mike Hollick, Regis Cridlig, Nozomi Ytow, Egbert Eich, David Bateman and
Table of Contents