i810 mergedfb options present in ati driver not implemented

[emisca]

I would like to patch the i810 driver to implement these two features
present in radeon driver:
       Option "MergedDPI" "string"
              The  driver  will attempt to figure out an appropriate DPI based
              on the DDC information and the orientation of the heads when  in
              merged  framebuffer  mode.  If this value does not suit you, you
              can manually set the DPI using this option.
              For example, Option "MergedDPI" "100 100"
              The default value is undefined.

       Option "MergedNonRectangular" "boolean"
              If you are using MergedFB with two  modes  of  different  sizes,
              turn  this  option  on  to  keep the smaller head from scrolling
              within the larger virtual desktop and to  keep  the  mouse  from
              moving into that area.  Applications that are not Xinerama aware
              can potentially end up stranded in this area.
              The default value is FALSE.

Does anyone already worked on these?
In the next days I will look ati driver sources and I'll try to port
them to i810 driver like I did for MergedXineramaSecondIsScreen0.
I will post them when are ready..