On Saturday 09 January 2010, Linus Torvalds wrote: > > On Sat, 9 Jan 2010, Rafael J. Wysocki wrote: > > > > From: Rafael J. Wysocki <rjw@xxxxxxx> > > > > Commit cbda12d77ea590082edb6d30bd342a67ebc459e0 (drm/i915: implement > > new pm ops for i915), among other things, removed the .suspend and > > .resume pointers from the struct drm_driver object in i915_drv.c, > > which broke resume without KMS on my MSI Wind U100. > > > > Fix this by reverting that part of commit cbda12d77ea59. > > Hmm. I get the feeling that perhaps the of the drm_driver callbacks was > very muchintentional, and that the code presumably wants to be called > purely through the PCI layer, and not through the "drm class" logic at > all? > > Your patch seems like it would always execute the silly class suspend even > though we explicitly don't want to. And a much nicer fix would seem to > register the thing properly as a PCI driver even if you don't then use > KMS. > > So it looks to me like the problem is that drm_init() will register the > driver as a real PCI driver only if > > driver->driver_features & DRIVER_MODESET > > and otherwise it does that very odd "stealth mode manual scanning" thing > which doesn't register it as a proper PCI driver. > > So could we instead make that "disable KSM" _just_ disable the mode > setting part, not disable the "I'm a real driver" part? Hmm. Do you mean set DRIVER_MODESET unconditionally before calling drm_init() and only reset it later if necessary? Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
