sorry for my bad language. If You need more information or my message is not easy to understand, please ask, i can provide more information or explain.
is there any live people? May be this forum is dead?
If you look in the open source X drivers there are some good examples of how to reduce engine clocks and enable clock gating :
Suggest you follow the move to Kernel Modesetting (KMS), since that will make it feasible to (a) implement better power management in the kernel driver, and (b) have the console use that driver code (ie sharing it with X).