On Tue, Jul 26, 2011 at 9:20 AM, Dave Airlie airlied@gmail.com wrote:
On Thu, Jul 7, 2011 at 3:01 PM, Alex Deucher alexdeucher@gmail.com wrote:
On Wed, Jul 6, 2011 at 7:30 PM, reimth@googlemail.com wrote:
From: Thomas Reim rdratlos@yahoo.co.uk
Guys I really still hate this :-)
Other OSes must deal with this sort of thing and I can't say they don't do it like this but I can't say for certain this feels like the right answer.
I emailed the closed driver display team, but as the issue seems to only afflict certain rs690/rs740 boards, I'm not sure anyone will remember what quirks those boards had as they are about 5 generations old at this point.
My thinking is that we could probably just trust the hot plug detect if its reported on HDMI and DVI-D connectors, we still need to poll DVI-D as the VGA->DVI convertors don't often assert hpd.
Am I missing something that this wouldn't fix?
The issue in this case is that the problematic connectors don't have HPD pin wired up and the ddc lines seem to be wired improperly so a ddc probe always reports something connected unless you actually look at the EDID header. For DVI-I we probably have to poll since only the digital portion will assert hpd in most cases.
Alex