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fbdev_loopback application

Alyona
Expert 1295 points

Hi, everybody,

I compiled fbdev_loopback application with the corresponding makefile (in .../fbdev).

My bootargs regarding FBDev are: video=davincifb:vid0=OFF:vid1=480x272x16,4050K 

A use following parameters: /.fbdev_loopback -i0 -m1 -d1 -w0 -p0

In the end of the log there is:

---

 Failed FBIOPUT_VSCREENINFO for vid1

Failed to init vid1 window restore_config : Enter
restore_config : Leave
main : Leave

---

The issue is that I can't even find the string "Failed FBIOPUT_VSCREENINFO " in  drivers' sources (/dvsdk/psp/linux-2.6.32.17-psp03.01.01.39/drivers). 

" FBIOPUT_VSCREENINFO " met only in comments in davincifb.c and in fbmem.c, but in fbmem.c it leads to errors like "-EFAULT" and "-ENODEV" which have different output ("Bad address" or "No such device") that do not exist in my output.

How does it appear if absent in sources? How can I debug this? 

Thanks.