RE: [PATCH] ARM: vexpress: initial device tree support

Timur Tabi wrote at Wednesday, January 11, 2012 1:33 PM:

Stephen Warren wrote:

quoted

Well, the EDID needs to be read on every hotplug event, so it's certainly
not a one-time thing.

What is the hotplug event that triggers an EDID read?

For monitors attached to user-accessible connectors, whenever the user
physically plugs in a new monitor, you need to read the EDID since it
could be a new monitor. DVI and HDMI have explicit hotplug detect lines
to trigger this. I'm not sure how it works for VGA; perhaps you have to
manually reprobe.

Of course, if this thread is talking about built-in LCD displays where
the connectivity is fixed, this is a non-issue, but it's still a relevant
general design discussion; hopefully whatever solution that's picked would
work for DVI/HDMI even if you're dealing with LCDs right now.

-- 
nvpublic