2015-03-03 10:51:06 +00:00
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Introduction:
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SM750 of Silicon MOtion is pci express display controller device.
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The SM750 embedded graphics features include:
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- dual display
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- 2D acceleration
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- 16MB integrated video memory
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2015-04-24 13:40:42 +00:00
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About the kernel module parameter of driver:
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2015-03-03 10:51:06 +00:00
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Use 1280,8bpp index color and 60 hz mode:
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insmod ./sm750fb.ko g_option="1280x1024-8@60"
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Disable MTRR,Disable 2d acceleration,Disable hardware cursor,
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and use a 800x600 mode :
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insmod ./sm750fb.ko g_option="noaccel:nomtrr:nohwc:800x600"
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dual frame buffer for driver with "dual" parameter
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insmod ./sm750fb.ko g_option="dual,800x600:1024x768"
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it will create fb0 and fb1 (or fb1,fb2 if fb0 already exist) under /dev
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and user can use con2fb to link fbX and ttyX
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Notes:
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2015-04-24 13:40:42 +00:00
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1) if you build the driver with built-in method, the parameter
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2015-03-03 10:51:06 +00:00
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you edited in the grub config file will be also the
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2015-04-24 13:40:42 +00:00
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same format as above modular method,but additionally add
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2015-03-03 10:51:06 +00:00
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"video=sm750fb:"
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ahead of parameters,so,it looks like:
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video=sm750fb:noaccel,1280x1024@60,otherparam,etc...
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it equal to modular method with below command:
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insmod ./sm750fb.ko g_option="noaccel:1280x1024@60:otherparm:etc..."
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2015-04-24 13:40:42 +00:00
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2) if you put 800x600 into the parameter without bpp and
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2015-03-03 10:51:06 +00:00
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refresh rate, kernel driver will defaulty use 16bpp and 60hz
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Important:
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if you have vesafb enabled in your config then /dev/fb0 will be created by vesafb
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and this driver will use fb1, fb2. In that case, you need to configure your X-server
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to use fb1. Another simple althernative is to disable vesafb from your config.
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