[Bug 93698] [BAT BYT regression] WARNING "Unclaimed register detected before reading register 0x186500"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93698

--- Comment #8 from cprigent <christophe.prigent at intel.com> ---
Created attachment 122180
  --> https://bugs.freedesktop.org/attachment.cgi?id=122180&action=edit
kern-with-mmio_debug.log

I don't see this warning when executing
kms_pipe_crc_basic at nonblocking-crc-pipe-b.
But I also don't see it with kernel boot command line: i915.mmio_debug=10000
Do we need to track it?

Hardware 
Platform : Bay Trail M
CPU : Intel(R) Celeron(R) CPU  N2930  @ 1.83GHz (family: 6, model: 55 stepping:
8)
SoC : VLV C0
CRB : Bayley Bay Fab3 Rev 03
Bios: 100.21
Software
Linux distribution: Ubuntu 15.10 64 bits
Kernel drm-intel-nightly 4.5.0-rc7 from http://cgit.freedesktop.org/drm-intel/
drm: tag 2.4.67-5 ea07de9 from http://cgit.freedesktop.org/mesa/drm/
mesa: tag 11.1.2 7bcd827 from http://cgit.freedesktop.org/mesa/mesa/
cairo: tag 1.15.2 db8a7f1 from http://cgit.freedesktop.org/cairo
IGT: 1.14 174a06 from
http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git

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