On Sat, Oct 5, 2013 at 6:47 PM, Thomas Richter <thor@xxxxxxxxxxxxxxxxx> wrote: > >> The CRT port can only be driven by pipe A, so I think that explains why >> your hacks may go bad when a CRT monitor is used. > > > Understood, this makes sense. Thus, DVO would then be at pipe B. How is this > switch made, and where? There need to be a register somewhere that tells the > i835 which signal goes where. If the intel_connector->base.encoder pointer is non-NULL, then you can get at the pipe throught to_intel_crtc(intel_connector->base.encoder->crtc)->pipe. If this pointer doesn't exist then the dvo chip shouldn't be in use at the moment. For intel_encoder you can chase to_intel_crtc(intel_encoder->base.crtc)->pipe, but you first need to check the crtc pointer for non-NULL. btw you can check whether pipe B works without a 2nd display potentially wreaking havoc (so should be simpler to debug) with: xrandr --output LVDS --crtc 1 --auto Cheers, Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
