[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

--- Comment #7 from krisman at collabora.co.uk ---
(In reply to Ville Syrjala from comment #4)

> 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.

trybot confirmed it addresses the issue:

https://intel-gfx-ci.01.org/CI/Trybot_973/

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170628/423e0708/attachment.html>