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