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chips - Chips and Technologies video driver
chips is an XFree86 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 XF86Config(5)
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:
"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"
The following driver Options are supported, on one or more of the
- Option "NoAccel" "boolean"
- Disable or enable acceleration.
Default: acceleration is enabled.
- Option "NoLinear" "boolean"
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 HW cursor. Default: off.
- Option "STN" "boolean"
- Force detection
of STN screen type. Default: off.
- Option "UseModeline" "boolean"
flat panel timings with values from the modeline. Default: off
- Option "FixPanelSize"
- Reprogram flat panel size with values from the modeline. Default:
- Option "NoStretch" "boolean"
- This option disables the stretching on
a mode on a flat panel to fill the screen. Default: off
- Option "LcdCenter"
- Center the mode displayed on the flat panel on the screen. Default:
- Option "HWclocks" "boolean"
- Force the use of fixed hardware clocks
on chips that support both fixed and programmable clocks. Default: off
- Use the Vclk1 programmable clock on HiQV chipsets
instead of Vclk2. Default: off
- Option "FPClock8" "float"
- Option "FPClock16"
- Option "FPClock24" "float"
- Option "FPClock32" "float"
- Force the
use of a particular video clock speed for use with the flat panel at a
- Option "MMIO" "boolean"
- Force the use of memory mapped
IO for acceleration registers. Default: off
- Option "FullMMIO" "boolean"
- Force the use of memory mapped IO where it can be used. Default: off
- Force driver to leave centering and stretching
registers alone. This can fix some laptop suspend/resume problems. Default:
- Option "Overlay"
- Enable 8+24 overlay mode. Only appropriate for depth
24. Default: off.
- 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"
- 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: off.
- Option "SyncOnGreen" "boolean"
- Enable or disable combining the sync signals with the green signal. Default:
- Option "ShowCache" "boolean"
- Enable or disable viewing offscreen memory.
Used for debugging only Default: off.
- Option "18bitBus" "boolean"
the driver to assume that the flat panel has an 18bit data bus. Default:
- 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"
- 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.
You are also recommended to read the README.chips
file that comes with all XFree86 distributions, which discusses the chips
driver in more detail.
Authors include: Jon Block, Mike Hollick,
Regis Cridlig, Nozomi Ytow, Egbert Eich, David Bateman and Xavier Ducoin
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