[Bug 104975] Delay in skl_disable_plane() causes a system freeze

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104975

--- Comment #40 from Azhar <azhar.shaikh at intel.com> ---

(In reply to Maarten Lankhorst from comment #39)
> The calls to kprintf will add a random delay, and will destroy the timing of
> the vblank evasion, so it's not surprising it causes a hang. We had to
> remove debug calls before because of that reason.
> 
> If the bug cannot be reproduced with the patch series any more, and you
> don't get warnings with CONFIG_DRM_I915_DEBUG_VBLANK_EVADE enabled, then I
> think it's fixed. :)

Sorry forgot to add yesterday, I still see couple of warnings with the above
config option enabled. Attaching those logs.

Could you please give your views on Art's comments in comment #26. Do we follow
the sequence mentioned by Art?

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