Root/
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> |
40 |
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