diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/fb/sa1100fb.txt | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/fb/sa1100fb.txt')
| -rw-r--r-- | Documentation/fb/sa1100fb.txt | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/fb/sa1100fb.txt b/Documentation/fb/sa1100fb.txt new file mode 100644 index 000000000000..f1b4220464df --- /dev/null +++ b/Documentation/fb/sa1100fb.txt @@ -0,0 +1,39 @@ +[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> |