which color formats should a driver support?

[Norbert Wagner <nw@xxxxxxxxxxxxxxxxxxx>]

Hi all,

I currently write a V4l2 driver for the DFG1394-1 frame grabber ( product-info 
at http://www.theimagingsource.com/prod/grab/dfg13941/dfg13941.htm ), and
now I am wondering which colorformats my driver should support:

The native formats are GREY, Y41P and UYVY. But what kind of formats do 
applications normally expect? Is it considered good style to provide at least 
RGB24, or should I keep the driver completely free from color conversion routines?

( The V4L2 sample driver *does* convert colors, and the xcaptest sample program 
seems to expect some RGB format ( at least, my current display results are a bit 
wired... )).

Thank's for your advice,
Norbert