1 ================= 1 =================
2 What is sa1100fb? 2 What is sa1100fb?
3 ================= 3 =================
4 4
5 .. [This file is cloned from VesaFB/matroxfb] 5 .. [This file is cloned from VesaFB/matroxfb]
6 6
7 7
8 This is a driver for a graphic framebuffer for 8 This is a driver for a graphic framebuffer for the SA-1100 LCD
9 controller. 9 controller.
10 10
11 Configuration 11 Configuration
12 ============== 12 ==============
13 13
14 For most common passive displays, giving the o 14 For most common passive displays, giving the option::
15 15
16 video=sa1100fb:bpp:<value>,lccr0:<value>,lcc 16 video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
17 17
18 on the kernel command line should be enough to 18 on the kernel command line should be enough to configure the
19 controller. The bits per pixel (bpp) value sho 19 controller. The bits per pixel (bpp) value should be 4, 8, 12, or
20 16. LCCR values are display-specific and shoul 20 16. LCCR values are display-specific and should be computed as
21 documented in the SA-1100 Developer's Manual, 21 documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel
22 displays are supported as long as the SDS bit 22 displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2>
23 are used for the lower panel. 23 are used for the lower panel.
24 24
25 For active displays or displays requiring addi 25 For active displays or displays requiring additional configuration
26 (controlling backlights, powering on the LCD, 26 (controlling backlights, powering on the LCD, etc.), the command line
27 options may not be enough to configure the dis 27 options may not be enough to configure the display. Adding sections to
28 sa1100fb_init_fbinfo(), sa1100fb_activate_var( 28 sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
29 sa1100fb_disable_lcd_controller(), and sa1100f 29 sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
30 will probably be necessary. 30 will probably be necessary.
31 31
32 Accepted options:: 32 Accepted options::
33 33
34 bpp:<value> Configure for <value> 34 bpp:<value> Configure for <value> bits per pixel
35 lccr0:<value> Configure LCD control 35 lccr0:<value> Configure LCD control register 0 (11.7.3)
36 lccr1:<value> Configure LCD control 36 lccr1:<value> Configure LCD control register 1 (11.7.4)
37 lccr2:<value> Configure LCD control 37 lccr2:<value> Configure LCD control register 2 (11.7.5)
38 lccr3:<value> Configure LCD control 38 lccr3:<value> Configure LCD control register 3 (11.7.6)
39 39
40 Mark Huang <mhuang@livetoy.com> 40 Mark Huang <mhuang@livetoy.com>
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