[Bug 101517] [BAT][BYT,BSW] WARN_ON(dev_priv->uncore.funcs.mmio_readl(dev_priv, (((const i915_reg_t){ .reg = (0x180000 + 0x650C) })), true) & (1 << 27))

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101517

krisman at collabora.co.uk changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #9 from krisman at collabora.co.uk ---
(In reply to krisman from comment #8)
> (In reply to Martin Peres from comment #5)
> 
> > > The simple solution would be to just revert commit 63ff30442519 ("drm/i915:
> > > Nuke the VLV/CHV PFI programming power domain workaround")
> > > 
> > > I failed to consider that the firmware likes to reset the cdclk to some
> > > non-minimum frequency during suspend, and then we apparently perform a
> > > modeset without actually modesetting anything and thus only end up
> > > reprogramming the cdclk without the power well being enabled.
> > 
> > Let's do it then! Revert fast, rework carefully.
> 
> Submitted to the ML:
> https://lists.freedesktop.org/archives/intel-gfx/2017-June/131672.html

Applied and verified by CI_DRM_2783.

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