First You Need a Raspberry Pi here are 3 different places to get them from.
newark.com
alliedelec.com
mcmelectronics.com
Here is 2 different sites to find the atrix or bionic Lapdeck
amazon.com
ebay.com
Now here comes the fun!
You need a
1ft Micro HDMI Male to Micro HDMI Female
Micro USB B Male To Female M/F Cable
Here is a kit from Amazon that has both of the above, but the first time I bought the kit, the HDMI cable didn't work, the second time they did. So buyer beware!
Cable Adapter Set Motorola Atrix
You will also need a Micro HDMI to Full HDMI
HDMI Male to Micro HDMI C Female F/M
Depending on how you wire your pi, you will need a cable like this, to cut and solder together, like the Picture at the bottom on the page.
One More Cable that you might need
Here is another Site that has different Pictures of cabling the Raspberry Pi.
I am working on a few different designs. More to come.