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U-Boot for proof-of-life video output?

Other Parts Discussed in Thread: THS8200

My prototype DM6467+THS8200 system takes 2 minutes to get running after power on.  I have other irons in the fire to shorten boot time, and in the past I showed proof of life on a system with ADV7171 instead of THS8200 by modifying the driver to turn on the DaVinci clock and configure the ADV7171 to generate color bars.

I could do the same color bar thing with the THS8200 driver, but that still takes on the order of a minute delay after power on.

Instead, I'm wondering about modifying the U-Boot code to configure DaVinci clock and THS8200 color bars.  This might give me a second or less to get video output after power on, and thus pretty quick "proof-of-life".

Do you think this is doable?  Where's the best place to get good, appropriate U-Boot source code?  Do I compile it on my Ubuntu linux VM (Win7pro host)?  

Thanks very much,

Helmut