[Intel-gfx] [PATCH] drm/i915: Avoid fluctuating to UNKNOWN connector status during forced probes

[Daniel Vetter]

On Fri, Jun 19, 2015 at 02:21:59PM +0100, Chris Wilson wrote:
> > Maybe we instead need a drm helper module option to clamp unknown
> > uncondiotionally to disconnected to allow users to hack around silly
> > userspace?
> 
> We have userspace that respects unknown, after it is what the fb_helper
> was copied from. Unknown is unknown, userspace can either treat it as
> potentially connector or potentially disconnected depending on best that
> suites its purposes. So I don't think a global change is sensible.

Well you implement some kind of clamping in i915 drivers. My stance is
that no matter what exact kind of clamping we agree on it should be
implemented in shared code in the probe helpers. And we already have quite
a bit of unknown duct-taping going on in the probe helpers, but it seems
to not be enough. And tbh I'm not sure what more we need short of just
clamping unknown in general.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch