40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
|
[This file is cloned from VesaFB/matroxfb]
|
||
|
|
|
||
|
|
What is sa1100fb?
|
||
|
|
=================
|
||
|
|
|
||
|
|
This is a driver for a graphic framebuffer for the SA-1100 LCD
|
||
|
|
controller.
|
||
|
|
|
||
|
|
Configuration
|
||
|
|
==============
|
||
|
|
|
||
|
|
For most common passive displays, giving the option
|
||
|
|
|
||
|
|
video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
|
||
|
|
|
||
|
|
on the kernel command line should be enough to configure the
|
||
|
|
controller. The bits per pixel (bpp) value should be 4, 8, 12, or
|
||
|
|
16. LCCR values are display-specific and should be computed as
|
||
|
|
documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel
|
||
|
|
displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2>
|
||
|
|
are used for the lower panel.
|
||
|
|
|
||
|
|
For active displays or displays requiring additional configuration
|
||
|
|
(controlling backlights, powering on the LCD, etc.), the command line
|
||
|
|
options may not be enough to configure the display. Adding sections to
|
||
|
|
sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
|
||
|
|
sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
|
||
|
|
will probably be necessary.
|
||
|
|
|
||
|
|
Accepted options:
|
||
|
|
|
||
|
|
bpp:<value> Configure for <value> bits per pixel
|
||
|
|
lccr0:<value> Configure LCD control register 0 (11.7.3)
|
||
|
|
lccr1:<value> Configure LCD control register 1 (11.7.4)
|
||
|
|
lccr2:<value> Configure LCD control register 2 (11.7.5)
|
||
|
|
lccr3:<value> Configure LCD control register 3 (11.7.6)
|
||
|
|
|
||
|
|
--
|
||
|
|
Mark Huang <mhuang@livetoy.com>
|