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siliconmotion - Silicon Motion video driver
[ Option "optionname" ["optionvalue"]]
siliconmotion is an Xorg driver for Silicon Motion
based video cards. The driver is fully accelerated, and provides support
for the following framebuffer depths: 8, 16, and 24. All visual types are
supported for depth 8, and TrueColor visuals are supported for the other
The siliconmotion driver supports PCI and AGP
video cards based on the following Silicon Motion chips:
Please refer to xorg.conf(5)
configuration details. This section only covers configuration details specific
to this driver. All options names are case and white space insensitive
when parsed by the server, for example, "lynxe" and "LynxE" are equivalent.
Multihead mode configuration is done through the RandR1.2 interface (see
for further information). Hardware accelerated
screen rotation and framebuffer resizing are only supported with the EXA
acceleration architecture (see the AccelMethod option below).
auto-detects the chipset type, but the following ChipSet names may optionally
be specified in the config file "Device" section, and will override the
"lynx", "lynxe", "lynx3d", "lynxem", "lynxem+", "lynx3dm",
The following Cursor Options are supported:
- Enable or disable the HW cursor. Default: on.
- Inverse of "HWCursor". Default: off.
display Options are supported:
- Option "VideoKey" "integer"
- Set the video
color key. Default: a little off full blue.
- Option "ByteSwap" "boolean"
- Turn on byte swapping for capturing using SMI demo board. Default: off.
- Option "Interlaced" "boolean"
- Turn on interlaced video capturing. Default:
- Option "UseBIOS" "boolean"
- Use the BIOS to set the modes. This is used
for custom panel timings. Default: off for SM72x and SM5xx, otherwise on.
- Option "Dualhead" "boolean"
- Enable dualhead mode. Currently not all chips
are supported and hardware video overlay (XV) support may have some limitations.
- Option "PanelSize" "widthxheight"
- Override LCD panel dimension
- Option "UseFBDev" "boolean"
- Don't actually program the hardware
mode registers, but leave it as set by the operating system. Only available
on MSOC chips. Default: off.
- Option "CSCVideo" "boolean"
- CSC video uses color
space conversion to render video directly to the framebuffer, without using
an overlay. Only available on MSOC chips. Default: on.
The following video
memory Options are supported:
- Option "mclk" "integer"
- Sets the memory clock.
You must specify the units. For example 50Mhz is the same as 50000Khz or
50000000Hz. On MSOC chips this is the main clock source for all functional
blocks, such as the 2D engine, GPIO, Video Engine, and DMA Engine. This
option is only used for debugging purposes on MSOC chips. Default: probe
the memory clock value, and use it at server start.
- Option "mxclk" "integer"
- Sets the memory clock. You must specify the units. For example 50Mhz is
the same as 50000Khz or 50000000Hz. Clock source for the local SDRAM controller.
This option is only available on MSOC chips and used only for debugging
purposes. Default: probe the memory clock value, and use it at server start.
The following acceleration and graphics engine Options are supported:
- Option "NoAccel"
- Disable acceleration. Very useful for determining if the
driver has problems with drawing and acceleration routines. This is the
first option to try if your server runs but you see graphic corruption
on the screen. Using it decreases performance, as it uses software emulation
for drawing operations the video driver can accelerate with hardware. Default:
acceleration is enabled.
- Option "AccelMethod" "string"
- Chooses between available
acceleration architectures. Valid options are XAA and EXA. XAA is the traditional
acceleration architecture and support for it is very stable. EXA is a newer
acceleration architecture with better performance for the Render and Composite
extensions, but the rendering code for it is newer and possibly unstable.
The default is XAA.
The following PCI bus Options are supported:
- will enable PCI burst mode. This should work on all
but a few broken PCI chipsets, and will increase performance. Default:
- Option "PciRetry" "boolean"
- will allow the driver to rely on PCI Retry
to program the registers. PciBurst must be enabled for this to work. This
will increase performance, especially for small fills/blits, because the
driver does not have to poll the card before sending it commands to make
sure it is ready. It should work on most recent PCI chipsets. Default:
value of PciBurst option.
For assistance with this driver, or Xorg in general, check the
web site at http://www.x.org/.
If you find a problem with Xorg or have a
question not answered in the FAQ please use our bug report form available
on the web site or send mail to firstname.lastname@example.org. When reporting
problems with the driver send as much detail as possible, including chipset
type, a server output log, and operating system specifics.
Brosius, Matt Grossman, Harald Koenig, Sebastien Marineau, Mark Vojkovich,
Frido Garritsen, Corvin Zahn.
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