Linux/AM5728: DSS applications questions

Part Number: AM5728

Tool/software: Linux

Hello

I want to ask u some questions about the dss applications.

When I ran the code  "drmclone -l 800x480 -p 320x240:240+120 -h 640x480" on the AM5728 evm with sdk4.1.Ifonud the command in the  website:processors.wiki.ti.com/.../Processor_Linux_SDK_Graphics_and_Display

It showed :

/dev/dri/card0 open success!

lcd connector id = 31

hdmi connector id = 36

lcd encoder id = 30

hdmi encoder id = 35

error:omapdrm:dss: failed to enable plane

and I tried the code " drmextended -l 800x480 -p 320x240:0+0 -h 640x480",it showed the same result.

So could give me some adviceto solve the problem?

And do u have the drmclone source code?Could u provide it to me?

Tahnks&regards!

drmclone -l 800x480 -p 320x240:240+120 -h 640x480