[Bug 75629] [r128] Changes needed for RandR support

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75629

--- Comment #26 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #25)
> 
> > 
> > Should I just change the *_0 bits to *_1 or should I put that inside a
> > powerpc check? I think the old code might've been for Apple Sense.
> 
> I suspect the pin mapping is different for DVI vs. VGA.  Take the
> RADEONI2CBusRec from radeon and set the masks and registers differently for
> VGA vs. DVI.  Then you can use the appropriate registers/masks for each
> connector when you want to probe the monitor.

See RADEONI2CGetBits() and RADEONI2CPutBits() in radeon for example.  Since it
seems like r128 always use the same registers for clk and data, you could
probably skip the separate steps for clk and data and just combine the masks
like the current r128 i2c code does.

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