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Documentation / fb / sa1100fb.txt




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Based on kernel version 3.13. Page generated on 2014-01-20 22:02 EST.

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