Mailinglist Archive: radeonhd (408 mails)

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http://bugs.freedesktop.org/show_bug.cgi?id=21812





--- Comment #10 from Matthias Hopf <mhopf@xxxxxxx>  2009-06-03 09:06:22 PST ---
(In reply to comment #9)
> Whatever you do with these patches, invested time won't be wasted. I'm doing
> that to understand the way driver works and slowly I'm getting clue on that :)

I agree that this is a good way to understand the AtomBIOS inner workings, and
we definitely could need another guy understanding it - sometimes you just need
to know(TM) what actually happens to make something work :-)

> I decided to publish my work because I thought you prefer to use registers
> rather than AtomBIOS in radeonhd... I based my opinion on using registers for
> PLL/CRTC/etc by radeonhd.

Given that AtomBIOS works actually pretty well this is not a *strong*
preference now. Still, in quite some regions direct coding is preferred. Power
management however is something that can easily change subtly between chips
(e.g. delays between register accesses or register access order may change). In
these cases using AtomBIOS might be a better idea, however, we don't know yet
whether we can do everything we want to with AtomBIOS alone. So your analysis
might come in handy later on.


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