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