[Vega10] [bisected] Performance regression with Dawn Of War III and RADV

[Samuel Pitoiset]

Hi there,

I found a performance regression that affects my Vega10 with Dawn Of War 
III and RADV (ie. 74FPS -> 71FPS). I bisected to:

commit ea7f492b6ac6eced0d09ccb2b0a2909a0025e22e
Author: Evan Quan <evan.quan at amd.com>
Date:   Mon Jul 16 17:23:19 2018 +0800

     drm/amd/powerplay: correct the argument for PPSMC_MSG_SetUclkFastSwitch

     The argument was set wrongly. Fast/slow switch was asked when there is
     actually a slow/fast switch needed.

     Change-Id: Ibcfdf741dea1700cc3796f84291606231e732f4b
     Signed-off-by: Evan Quan <evan.quan at amd.com>
     Reviewed-by: Rex Zhu<rex.zhu at amd.com>

Any ideas?

Thanks,
Samuel.