Comment # 35
on bug 73378
from Alex Deucher
(In reply to Chernovsky Oleg from comment #34) > > Is this some kind of open hardware docs? Or just internal? Maybe I missed > something Just internal. (In reply to Chernovsky Oleg from comment #33) > P.S. I only fear that maybe I launched mmiotrace too late, I did rmmod and > then modprobe fglrx again. Could it setup any registers at the first run? > Because at second it touched UVD only when I launched mpv. To save power the UVD clocks are only raised when it's actually in use. I think fglrx does some low level hw init similar to what we do in radeon, but they don't do a ring test so they probably don't change the UVD plls at driver load time only when UVD is in use (although I'm not 100% sure off hand).
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