staging: sm750fb: add sm750 to staging
sm750 of Silicon Motion is pci-e display controller device and has
features like dual display and 2D acceleration. This patch adds the
driver to staging.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/sm750fb/readme b/drivers/staging/sm750fb/readme
new file mode 100644
index 0000000..ab9af79
--- /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.
