Connection and Setup of Panasonic EDMGRB8KJF LCD

From GumstixDocsWiki

The electrical Connections.

LCD   5,15,17,19  : GND
LCD   10,11,13,18 : 3.3V (from separate regulator)

LCD    Gumstix
------------
1,D7  - LDD7
2,D6  - LDD6
3,D5  - LDD5
4,D4  - LDD4

6,D3  - LDD3
7,D2  - LDD2
8,D1  - LDD1
9,D0  - LDD0

12,CP - PCLK

14,LOAD-LCLK

16,DISP-GPIO 16 (PWM0)

20,FRM -FCLK

Here is the bootargs setup i have.

console=tty0 console=ttyS0,115200n8 root=1f01 rootfstype=jffs2 video=pxafb:mode:640x480-16,
passive,color,hsynclen:3,right:5,left:10,vsynclen:39,pixclock:100000,hsync:1,vsync:1,pixclockpol:0

After all this just run the lines on Gumstix.

pxaregs GPCR0_16 1
pxaregs GPDR0_16 1
pxaregs GPSR0_16 1

If you don't want to enter any "pxaregs" lines at all in order to enable the LCD follow the procedure below to enable these pins from U-Boot.

First of all turn on Gumstix and as soo as the U-boot count down begins press any key to enter into the command prompt of U-Boot.

Type the following

setenv enable_lcd "mw 40e00024 00010000; mw 40e0000c c183b9f8; mw 40e00018 00010000"

After these lines you will have to envoke the "enable_lcd" from "bootcmd", so type the following

setenv linux "fsload a2000000 boot/uImage;bootm a2000000"

Which will define "linux" as the booting variable.

Then as the final step type

setenv bootcmd "run enable_lcd; run linux"

And save the environment by entering

saveenv

Now you should have the LCD going ON even before Linux starts to Boot.

I hope that this helps someone. (the info was given to me by Jean-Francois Richard