drivers/staging/sm750fb/readme

   1 Introduction:
   2         SM750 of Silicon MOtion is pci express display controller device.
   3         The SM750 embedded graphics features include:
   4         - dual display
   5         - 2D acceleration
   6         - 16MB integrated video memory
   7
   8 About the kernel module parameter of driver:
   9
  10         Use 1280,8bpp index color and 60 hz mode:
  11         insmod ./sm750fb.ko g_option="1280x1024-8@60"
  12
  13         Disable MTRR,Disable 2d acceleration,Disable hardware cursor,
  14         and use a 800x600 mode :
  15         insmod ./sm750fb.ko g_option="noaccel:nomtrr:nohwc:800x600"
  16
  17         dual frame buffer for driver with "dual" parameter
  18         insmod ./sm750fb.ko g_option="dual,800x600:1024x768"
  19         it will create fb0 and fb1 (or fb1,fb2 if fb0 already exist) under /dev
  20         and user can use con2fb to link fbX and ttyX
  21
  22         Notes:
  23         1) if you build the driver with built-in method, the parameter
  24                 you edited in the grub config file will be also the
  25                 same format as above modular method,but additionally add
  26                 "video=sm750fb:"
  27                 ahead of parameters,so,it looks like:
  28                 video=sm750fb:noaccel,1280x1024@60,otherparam,etc...
  29                 it equal to modular method with below command:
  30                 insmod ./sm750fb.ko g_option="noaccel:1280x1024@60:otherparm:etc..."
  31
  32         2) if you put 800x600 into the parameter without bpp and
  33                 refresh rate, kernel driver will defaulty use 16bpp and 60hz
  34
  35 Important:
  36         if you have vesafb enabled in your config then /dev/fb0 will be created by vesafb
  37         and this driver will use fb1, fb2. In that case, you need to configure your X-server
  38         to use fb1. Another simple althernative is to disable vesafb from your config.