Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[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:,lccr0:,lccr1:,lccr2:,lccr3:

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:    Configure for  bits per pixel

lccr0:  Configure LCD control register 0 (11.7.3)

lccr1:  Configure LCD control register 1 (11.7.4)

lccr2:  Configure LCD control register 2 (11.7.5)

lccr3:  Configure LCD control register 3 (11.7.6)

--

Mark Huang