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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #24 from Connor Behan <connor.behan at gmail.com> ---
(In reply to comment #23)
> > Detecting the valid modes with EDID would be nice, but I think this solves
> > the most important problem. The driver now knows whether a monitor is
> > plugged in and hence whether to drive Crtc2. If you agree, I will send this
> > patch to the list.
> 
> Does it actually change when you have a monitor vs. not?  If probing works,
> you are probably pretty close to getting full i2c working.

Yes. And you are right, i2c was almost working. I got it working by trying all
16 combinations for the bits in a loop. The valid pair was
(R128_GPIO_MONID_*_3, R128_GPIO_MONID_*_1) instead of (R128_GPIO_MONID_*_3,
R128_GPIO_MONID_*_0).

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.

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