So I've been reviewing the i915/ironlake CRT detect code and am a bit confused.
I though on the i945 and above that we had proper CRT hotplug detection with an IRQ, that didn't require any polling. Now looking at the code when we do a CRT detect, the first thing we do is try the hotplug method, however on ILK/SNB this is crap and requires powering off the ADPA, which turns off the monitor, if that fails we fallback to DDC probing which is pretty non-destructive. I get the feeling the whole hotplug detect code is pointless if the hardware is already meant to send us an IRQ when something happens, or at least I think the DDC probe should be > than the hotplug probe if the hotplug probe is too remain destructive. Dave. _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
