[git pull] drm fixes

[Daniel Vetter]

On Sat, Aug 31, 2013 at 04:02:16PM -0700, Linus Torvalds wrote:
> Hmm. I just updated my machine to a i7-4770S (kept everything else the
> same, just switched out motherboards), and now when my display goes to
> sleep, it seems to never come back.

Sleep as in dpms off ($ xset dpms force off) or sleep as in system
suspend?

> Any known issues with DVI on Haswell (it seems to show up as "HDMI1"
> as the output, but it's a DVI cable)? I need to get a DP cable anyway
> (right now I'm driving my 2560x1440 display at 32Hz due to DVI crap)
> and maybe that will fix things, but this happens even if I don't force
> that odd mode (so it maxes out at 1920x1200 or whatever).
> 
> I doubt this is new, but I've only ever run current -git on this
> machine, so who knows..  The machine ends up being kind of unusable. I
> guess I can just turn off power save.

Hm, doesn't ring a bell here. Adding Paulo, our residential hsw display
expert.

Aside hsw hdmi ports support 300MHz dotclocks, but still only single-link.
So I guess your dvi screen is still out of luck since it likely wants a
dual-link dvi signal. But if you have a hdmi port it should work a bit
better (hdmi pumped up the max dotclock a bit already a while ago ...).

Cheers, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch