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@@ -0,0 +1,76 @@ +What works: +- Supports 8bpp, 16bpp and 24bpp. Heavy testing on SM720. + +XCONFIG options: + +The driver supports quite a few different XConfig options, which can +be used to tune the driver and improve performance. Without any options, +the driver will use conservative settings which should work on most +hardware. Large improvements in performance are possible by selecting +the proper options, which will probably work on most systems. + +Cursor: + +- "hwcursor" "off" behaves exactly like "swcursor". Default: "on" +- "swcursor" will disable the HW Cursor. HW Cursor is used by default and + no option is needed to enable it. + +Display: + +- "ShadowFB" Use shadow framebuffer. Default: off. +- "Rotate" "cw" | "ccw" Rotate the screen CW - clockwise or CCW - counter + clockwise. Uses ShadowFB. Default: no rotation. +- "UseBIOS" Use BIOS to set modes. Default: on. +- "ZoomOnLCD" Allow changing resolution on panel. Default: off. + +Overlays: + +- "VideoKey" Set chroma key for video. Default: Off blue. +- "ByteSwap" Turn on YUV byte swapping. Defaul: off. + +Video memory: + +- "set_mclk" sets the memory clock, format is: + Option "set_mclk" "50000" + in the XF86Config file. Valid values are any + integer <= 100000, where 100000 == 100 MHz. + +Acceleration and graphic engine: + +- "NoAccel" turns off all acceleration +- "fifo_aggressive", "fifo_moderate" and "fifo_conservative" alter the settings + for the threshold at which the pixel FIFO takes over the internal + memory bus to refill itself. The smaller this threshold, the better + the acceleration performance of the card. You may try the fastest + setting ("aggressive") and move down if you encounter pixel corruption. + The optimal setting will probably depend on dot-clock and on color + depth. Note that specifying any of these options will also alter other + memory settings which should increase performance, so you should at + least use "fifo_conservative" (this uses the chip defaults). +- Common XAA acceleration options to disable primitives for test purposes: + "XaaNoScreenToScreenCopy" + "XaaNoSolidFillRect" + "XaaNoColor8x8PatternFillRect" + "XaaNoImageWriteRect" + "XaaNoPixmapCache" + +PCI bus: + +- "pci_burst" will enable PCI burst mode. This should work on all but a + few "broken" PCI chipsets, and will increase performance. Option may + take a parameter "on", "off", "yes", etc... +- "pci_retry" will allow the driver to rely on PCI Retry to program the + ViRGE registers. "pci_burst" 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 ViRGE before sending it + commands to make sure it is ready. It should work on most + recent PCI chipsets. + +Debug: + +- "ShowCache" Enable or disable viewing offscreen cache memory. A + development debug option. Default: off. + +Header: //Mercury/Projects/archives/XFree86/4.0/README.-arc 1.2 14 Sep 2000 12:28:36 Frido $ + +$XFree86: xc/programs/Xserver/hw/xfree86/drivers/siliconmotion/README,v 1.3 2001/02/15 18:20:33 dawes Exp $ |