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Diffstat (limited to 'drivers/staging/sm750fb/readme')
| -rw-r--r-- | drivers/staging/sm750fb/readme | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/staging/sm750fb/readme b/drivers/staging/sm750fb/readme new file mode 100644 index 000000000000..ab9af791653d --- /dev/null +++ b/drivers/staging/sm750fb/readme @@ -0,0 +1,38 @@ +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 paramter 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 paramter + you edited in the grub config file will be also the + same format as above modular method,but additionaly 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 paramter 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. |