How to change the timing of On-Chip hdmi timing in dm8168 ?

Hello,

You could check this guide:

Here is an example, which is working on my side:

root@dm816x-evm:~# /etc/init.d/matrix-gui-e stop
Stopping Matrix GUI application.
root@dm816x-evm:~# /etc/init.d/pvr-init stop
Stopping PVR
root@dm816x-evm:~# echo 0 > /sys/devices/platform/vpss/display0/enabled
root@dm816x-evm:~# echo 33500,800/164/89/10,480/10/23/10,1 > /sys/devices/platform/vpss/display0/timings
root@dm816x-evm:~# echo 1 > /sys/devices/platform/vpss/display0/enabled
root@dm816x-evm:~# fbset -xres 800 -yres 480 -vxres 800 -vyres 480
root@dm816x-evm:~# /etc/init.d/matrix-gui-e start
Starting Matrix GUI application.
root@dm816x-evm:~# cat /sys/devices/platform/vpss/display0/mode
800x480@60

BR
Margarita

hi,I met a problem,echo 0 > /sys/devices/platform/vpss/display0/enabled
write error,invalid argument....

Hello,

What is the software release that you are using here?

I tried with default EZSDK 5.05.02 on EVM.

BR
Margarita

I want to know what else need to do before execute echo 0 > /sys/devices/platform/vpss/display0/enabled

without running any program, echo 0 > /sys/devices/platform/vpss/display0/enabled command no error

Hello,

Check the example above.

You should stop the graphics before echo 0 > /sys/devices/platform/vpss/display0/enabled.

BR
Margarita