On Mon, Apr 14, 2014 at 11:17:53AM +0300, Imre Deak wrote: > On Mon, 2014-04-14 at 09:47 +0200, Daniel Vetter wrote: > > On Mon, Apr 14, 2014 at 9:43 AM, Arun Chandran <achandran@xxxxxxxxxx> wrote: > > > 1) Revert the commit 77961eb984c7e5394bd29cc7be2ab0bf0cc7e7b1. > > > With this commit DP hotplug events are not coming after doing "xset dpms > > > force off" > > > > > > commit bfcbf45b5b458ebdc38118ca67279a1cd90e085d > > > Author: Arun Chandran <achandran@xxxxxxxxxx> > > > Date: Fri Apr 11 16:16:32 2014 +0530 > > > > > > Revert "drm/i915: power domains: add vlv power wells" > > > > > > This reverts commit 77961eb984c7e5394bd29cc7be2ab0bf0cc7e7b1. > > > > So this breaks DP hotplug detection? Imre? > > Yes, unfortunately. I made this clear in my patchset [1] and it was also > discussed on IRC. If there isn't any (e)DP,HDMI pipe active we power > down the DPIO HW block responsible normally for DP and HDMI hotplug > detection. > > There is one possible solution: the pin that is used for HPD detection > can be used either normally in the above way, where it's controlled by > the DPIO block, or as a GPIO where it's controlled by the GPIO HW block > which is on even if we power down the DPIO. So during power down periods > we could reconfigure that pin to work as a GPIO and treat any interrupts > arriving it as an HPD event. I haven't had yet time to investigate this. > > Another way is to turn on polling while powered down. This would also > make VGA hotplug work, for which we don't have a GPIO alternative as > above. > > [1] > http://lists.freedesktop.org/archives/intel-gfx/2014-February/040232.html Iirc we've agreed that when all screens are off it's ok to no longer support hotplug. Or is this only the case when _only_ the DP port is off but e.g. another port (edp or mipi) is on? I'm asking since currently on hsw/bdw hotplug also doesn't work when you switch everything off ... -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
