Re: [PATCH v5 00/12] Enable GPU switching on pre-retina?MacBook Pro

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On Tue, 2016-03-15 at 21:10 +1000, Dave Airlie wrote:
> > 
> > 
> > I guess that's only useful until we get runtime PM support.
> For the discrete GPUs on regular laptops we have runtime PM support
> for
> powerdown already. Some newer laptops need a bit of work in the PCIE
> layer
> but for most things we have it covered. The known broken ones are
> Apple
> laptops. If the apple-gmux code is working well enough to power off
> GPUs,
> then it should be possible to hook up runtime-pm on those machines
> pretty
> simply.
> 
> So there shouldn't really be a case we care about.
> 
> runtime PM for the Intel GPU isn't as important. We don't even want
> to
> turn the i915 fully off anymore.

Fair enough. And it's not that big a problem if we want to try and run
the compositor on the integrated card by default either.
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