[Bug 89554] [SKL Bisected] eDP can not be lighted up after entering kernel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89554

--- Comment #35 from Daniel Vetter <daniel at ffwll.ch> ---
(In reply to Sonika from comment #34)
> (In reply to Jani Nikula from comment #33)
> > We can base it on VBT when we can trust the VBT.
> 
> I really feel, that it should just be fixed in VBT to default value. This
> table only gives the values which can be used to save power which can be
> achieved with any panel which supports them and not necessarily be edp1.4.

If we have shipping broken VBT out there then we can't trust it. That's how
this works, because waiting for VBT to get fixed isn't an option. For
pre-production it's a bit different, but again if too many ppl are affected we
have to just ignore vbt unfortunately. And if a vbt escaped into the wild on
shipping hw we've lost entirely.

Maybe in some shiny bright future we can start to trust vbt by default, but
right now that's just not reality.

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