Re: [PATCH 4/4] drm/i915: check LVDS for EDID on GPU switches

From: Chris Wilson
Date: Tue Jan 07 2014 - 06:49:11 EST

On Tue, Jan 07, 2014 at 04:42:12PM +0530, Ramkumar Ramachandra wrote:
> Chris Wilson wrote:
> > On Tue, Jan 07, 2014 at 03:28:43PM +0530, Ramkumar Ramachandra wrote:
> >> If the LVDS panel wasn't connected at boot then we won't have an EDID
> >> for it. To fix this, call intel_lvds_get_edid() from the vga_switcheroo
> >> reprobe callback.
> >
> > I would rather have an iterator over all our connectors (or perhaps
> > encoders would be the right semantic, except we have
> > connectors==encoders) and a reprobe callback.
> I don't follow; iterate over which connectors? There's one
> lvds_connector for which we get EDID.

Rather than special casing lvds (especially when there are other panel
connectors that can also be muxed), extend the connector interface to
support a reprobe and walk over all connectors associated with i915
after a switcheroo event.

> > Saves exporting private
> > functions and prevent me asking silly questions like what about eDP?
> Avoid exporting intel_lvds_get_edid()? Why?

Because it's a special case and misses others.

Chris Wilson, Intel Open Source Technology Centre
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