[PATCH 08/36] xfree86: add platform bus hotplug support (v2)

Keith Packard keithp at keithp.com
Tue Jul 3 11:18:11 PDT 2012

Dave Airlie <airlied at gmail.com> writes:

> no further changes needed, granted I've no idea what drivers other
> than modesetting will ever do proper hotplug,
> I suppose I could get a real PCIE dock at some point and hotplug
> radeon or nouveau, but there is a lot of work
> kernel side before we could even start on the userspace drivers.

Definitely an adventure for a future time (where we imagine things like
Thunder Bolt monitors with integrated GPUs).

> with dual-gpu machines even if we power off the discrete we never
> "unplug" it, its all abstracted in the kernel.


If we aren't dealing with hot-plug drivers (aside from modesetting),
then perhaps the privates issue is far less daunting than we feared.
The modesetting driver uses no privates, and so we need only get the
full set of privates allocated from non-hotplug drivers at server
startup time, leaving the current private allocation system in place.

keith.packard at intel.com
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