How to rotate the display?

Hi,

1. You can check this wiki regarding tips about rotating the display: http://omappedia.org/wiki/Bootargs_for_enabling_display#Mirrorring_and_Rotation_of_OMAPFB

2. There is the following wiki page: http://omappedia.org/wiki/Display_Drivers_Domain_Wiki which will give you a general idea of the Display subsystem in OMAP devices.

3. There is OMAP4430 TRM, where you can get all the information about Display Subsystem Functionality in OMAP

Hope this is helpful.

Best Regards,

Yordan

does the string "echo 1 > /sys/devices/platform/omapdss/

Please pass omapfb.tiler=y through bootargs if you wish to use rotation feature through bootargs.

Hi,

To execute the command from your debug console, you should:

host pc# adb root

host pc# adb shell

host pc#

echo 1 > /sys/devices/platform/omapdss/.....

Best Regards,

Yordan

Also in the wiki I gave you in my previous post, it is described how to set the bootargs accordingly:

http://omappedia.org/wiki/Bootargs_for_enabling_display#DSS_specific_bootargs

As you can see form the link you can enable rotation of the display by adding  omapfb.rotate=<angle>:

        omapfb.rotate=<angle>
         - Default rotation applied to all framebuffers.
           0 - 0 degree rotation
           1 - 90 degree rotation
           2 - 180 degree rotation
           3 - 270 degree rotation

from bootargs. 
Best Regards, 
Yordan

Thank you for your replies

the bootargs seems not work.

I append the string "omapfb.tiler=y omapfb.rotate=2"  to my bootargs, but it seemed not work.

is anything wrong?

Did you initialize size of framebuffer in bootargs? please paste your bootargs, it will be more helpful to identify your problem.

Thank you for your reply

my bootargs is

"console=ttyO3,115200n8 mem=456M@0x80000000 mem=512M@0xA0000000 init=/init vram=10M omapfb.vram=0:4M androidboot.console=ttyO3 omapfb.tiler=y omapfb.rotate=2"