Choose this option if you want to use an ATI Radeon graphics card as
a framebuffer device. There are both PCI and AGP versions. You
don't need to choose this to run the Radeon in plain VGA mode.

If you say Y here and want DDC/I2C support you must first say Y to
"I2C support" and "I2C bit-banging support" in the character devices
section.

If you say M here then "I2C support" and "I2C bit-banging support"
can be build either as modules or built-in.

There is a product page at
http://apps.ati.com/ATIcompare/

source code:

drivers/video/aty/