[coreboot] coreboot support for AMD HT3

[Peter Stuge]

Scott Duplichan wrote:
> At 1600x1200, 16-bit color is almost perfect. But the same
> resolution with 32-bit color results in a display that jumps so
> much it cannot be read. Why would 32-bit color make a difference?

Twice the bandwidth needed to get the graphics data out of RAM.


> I am thinking that refreshing 1600x1200 pixels 60 times per second
> takes a lot data, and that data has to cross the HT link. True
> color takes more data than high color, and true color may be
> exceeding the capacity of the cpu-RS780 link. The link is running
> at the slowest possible setting, 200 MHz, 8-bit.

Ouch! :\ That would seem to cause the problem.

Can't say about HT3 I'm afraid.


//Peter