How to drive a LCD on ARM based linux System

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LEARN ABOUT XFREE86

via

VIA(4)							     Kernel Interfaces Manual							    VIA(4)

NAME

       via - VIA video driver

SYNOPSIS

       Section "Device"
	 Identifier "devname"
	 Driver "via"
	 ...
       EndSection

DESCRIPTION

       via is an XFree86 driver for VIA video chipsets.

       The via driver supports the VIA CLE266 (CLE3122, CLE3022) chipset video and the VIA KM400/K8M800 VT3204/5/7204/5 video, including 2D accel-
       eration and the Xv video overlay extensions. Flat panel, TV and VGA outputs are supported.

       Direct rendering 3D is available for this device only using XFree86 4.2 builds. If you are interested in porting the DRI support to current
       XFree86 then please see the DRI project on sourceforge.net.

CONFIGURATION DETAILS

       Please refer to XF86Config(5) for general configuration details.  This section only covers configuration details specific to this driver.

       The following driver Options are supported:

       Option "NoAccel" "boolean"
	      Disable or enable acceleration. Default: acceleration is enabled.

       Option "HWCursor" "boolean"
	      Disable or enable use of hardware cursors. The default is enabled.

       Option "SWCursor" "boolean"
	      Disable or enable the use of a software cursor. The default is disabled.

       Option "ShadowFB" "boolean"
	      Use a shadow frame buffer. This is required when rotating the display, but otherwise defaults to disabled.

       Option "UseBIOS" "boolean"
	      Use the video BIOS to set modes. Default false.

       Option "VideoRAM" "boolean"
	      Override the VideoRAM auto detection. This should never be needed.

       Option "Rotate" "string"
	      Rotate the display either clockwise ("CW") or counter clockwise ("CCW").	Rotation is only supported unaccelerated.

       Option "ActiveDevice" "string"
	      Specify  the  active  device  combination. The choices are "CRT,TV", "CRT,LCD", "CRT,DFP", "TV,DFP", "CRT", "LCD", or "DFP", for the
	      various supported combinations of VGA CRT output, LCD panel output, DFP output and TV output.

       Option "LCDDualEdge" "boolean"
	      Use dual edge mode to set the LCD.

       Option "Center" "boolean"
	      Disable or enable image centering on DVI displays.

       Option "PanelSize" "string"
	      Specify the size (width x height) of the LCD panel attached  to  the  system.  Sizes  640x480,  800x600,	1024x768,  1280x1024,  and
	      1400x1050 are supported.

       Option "TVDotCrawl" "boolean"
	      Disable or enable dotcrawl.

       Option "TVType" "string"
	      Specify TV output format. The driver currently supports NTSC and PAL timings only.

       Option "TVOutput" "string"
	      Specify  which  TV  output  to  use.  The driver supports "S-Video", "Composite", "SC", "RGB" and "YCbCr" outputs. Note that on many
	      boards the composite video port is shared with audio out and jumper selected.

       Option "TVVScan" "string"
	      Specify whether to underscan the TV image (bordering it with black), or overscan it (losing the edges of the picture).

       Option "TVHScale" "string"
	      Not yet implemented.

       Option "TVEncoder" "string"
	      Specify which TV encoder chip is attached to the system. The driver currently supports the VT1621 and VT1622 encoders.

       Option "Refresh" "integer"
	      Specify the desired refresh.

       Option "DisableVQ" "boolean"
	      Disable or enable the use of VQ. VQ is enabled by default.

       Option "Cap0Deinterlace" "string"
	      Set the capture 0 port interlace mode to either Bob or Weave.

       Option "Cap1Deinterlace" "string"
	      Set the capture 1 port interlace mode to either Bob or Weave.

       Option "Cap0FieldSwap" "string"
	      Perform field swapping on capture port 0.

       Option "DRIXINERAMA" "boolean"
	      Set DRI Xinerama mode. Currently unsupported.

SEE ALSO

       XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)

AUTHORS

       Authors include: ...

XFree86 							   Version 4.7.0							    VIA(4)

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