[Bug 89123] [SKL]igt/pm_rps tests fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89123

--- Comment #5 from Akash Goel <akash.goels at gmail.com> ---
Actually earlier we had borrowed the SKL system but sorry last week only we
relinquished that system to the Windows team.
Will have to rearrange for another SKL system.

Meanwhile, can an experiment be tried out, of disabling RC6 (just need to clear
0xA090/0xA210 registers though intel_reg_write).

There is a known issue on initial SKL stepping (like BDW) that Turbo doesn't
work properly in conjunction with RC6 (Down threshold interrupts are missed).
I remember, I also did the same on my side for 'pm_rps' IGT test.

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