Dear dreambox friends,

I'm trying to port qtopia 4.2 to my dreambox7020 (STB04xxx). qtopia uses the framebuffer device to draw the graphics.
I'd like to use the dreambox pallasFB in 16bpp mode with transparency (keycolor-RGB565 or alpha bit-ARGB1555). When I try to set the pallasFB to ARGB1555 the framebuffer responds with RGB565.
Can anyone, please, point me to some information how to set the alpha or keycolor in 16bpp mode.

P.S. I can always set ARGB888 mode (32bpp) but I'm not very satisfied with the graphics performance.

With kind regards,
Nikola