linux/Documentation/fb/sa1100fb.rst
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   1=================
   2What is sa1100fb?
   3=================
   4
   5.. [This file is cloned from VesaFB/matroxfb]
   6
   7
   8This is a driver for a graphic framebuffer for the SA-1100 LCD
   9controller.
  10
  11Configuration
  12==============
  13
  14For most common passive displays, giving the option::
  15
  16  video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
  17
  18on the kernel command line should be enough to configure the
  19controller. The bits per pixel (bpp) value should be 4, 8, 12, or
  2016. LCCR values are display-specific and should be computed as
  21documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel
  22displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2>
  23are used for the lower panel.
  24
  25For active displays or displays requiring additional configuration
  26(controlling backlights, powering on the LCD, etc.), the command line
  27options may not be enough to configure the display. Adding sections to
  28sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
  29sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
  30will probably be necessary.
  31
  32Accepted options::
  33
  34        bpp:<value>     Configure for <value> bits per pixel
  35        lccr0:<value>   Configure LCD control register 0 (11.7.3)
  36        lccr1:<value>   Configure LCD control register 1 (11.7.4)
  37        lccr2:<value>   Configure LCD control register 2 (11.7.5)
  38        lccr3:<value>   Configure LCD control register 3 (11.7.6)
  39
  40Mark Huang <mhuang@livetoy.com>
  41