[Intel-gfx] [PATCH, RFC] Output hotplug support
jbarnes at virtuousgeek.org
Mon Oct 5 20:21:28 CEST 2009
On Mon, 05 Oct 2009 14:05:34 -0400
Adam Jackson <ajax at redhat.com> wrote:
> I'm shipping the following patch in Fedora 12 to enable output
> And it pretty much works! We get hotplug events from the DRM, rescan
> RANDR when that happens, events go out, userspace adapts. It's all
> quite cool. It's not really mergeable yet for all the reasons in the
> comments in the patch itself, but it's a start.
There are events for other stuff these days, including hangs and
errors. Just checking the environment for HOTPLUG=1 should be
> However, in order to actually ship this, I had to also ship this for
> the kernel:
> Otherwise, I'd get stuck in a loop where (afaict) output scan would
> trigger a TV interrupt, which would trigger a scan, etc. TV load
> detection not being the fastest thing in the world, X would process
> requests ve-ry slow-ly.
> If anyone actually understands the TV output code and wanted to take a
> look at this, I'd appreciate it.
I know I had it working at one point, but there have been a lot of
changes to the KMS TV code since then. I'll take a look. Sounds like
the fundamental bug is that TV scanning causes a TV hotplug event?
Jesse Barnes, Intel Open Source Technology Center
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