[Bug 96645] [regression 4.7] [BISECT]Low package c-states used only after forcing DPMS to off

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96645

--- Comment #15 from Gabriele Mazzotta <gabriele.mzt at gmail.com> ---
Before toggling DPMS:

    WM_PIPE_A = 0x00140006
    WM_PIPE_B = 0x00000000
    WM_PIPE_C = 0x00000000
WM_LINETIME_A = 0x00250078
WM_LINETIME_B = 0x00000000
WM_LINETIME_C = 0x00000000
       WM_LP1 = 0x02301406
       WM_LP2 = 0x06618912
       WM_LP3 = 0x0882b81a
   WM_LP1_SPR = 0x00000000
   WM_LP2_SPR = 0x00000000
   WM_LP3_SPR = 0x00000000
      ARB_CTL = 0x16663056
     ARB_CTL2 = 0x80000e80
      WM_MISC = 0x00000000
WM_PIPE_A: primary=20, cursor=6, sprite=0
WM_PIPE_B: primary=0, cursor=0, sprite=0
WM_PIPE_C: primary=0, cursor=0, sprite=0
WM_LINETIME_A: line time=120, ips line time=37
WM_LINETIME_B: line time=0, ips line time=0
WM_LINETIME_C: line time=0, ips line time=0
WM_LP1: disabled, latency=2, fbc=3, primary=20, cursor=6, sprite=0
WM_LP2: disabled, latency=6, fbc=6, primary=393, cursor=18, sprite=0
WM_LP3: disabled, latency=8, fbc=8, primary=696, cursor=26, sprite=0
Primary A trickle feed = enabled
Sprite A trickle feed = enabled
Primary B trickle feed = enabled
Sprite B trickle feed = enabled
Primary C trickle feed = enabled
Sprite C trickle feed = enabled
DDB partitioning = 1/2
FBC watermark = enabled

--------------------------

After toggling DPMS:

    WM_PIPE_A = 0x00140006
    WM_PIPE_B = 0x00000000
    WM_PIPE_C = 0x00000000
WM_LINETIME_A = 0x00250078
WM_LINETIME_B = 0x00000000
WM_LINETIME_C = 0x00000000
       WM_LP1 = 0x82301406
       WM_LP2 = 0x86618912
       WM_LP3 = 0x8882b81a
   WM_LP1_SPR = 0x00000000
   WM_LP2_SPR = 0x00000000
   WM_LP3_SPR = 0x00000000
      ARB_CTL = 0x16663056
     ARB_CTL2 = 0x80000e80
      WM_MISC = 0x00000000
WM_PIPE_A: primary=20, cursor=6, sprite=0
WM_PIPE_B: primary=0, cursor=0, sprite=0
WM_PIPE_C: primary=0, cursor=0, sprite=0
WM_LINETIME_A: line time=120, ips line time=37
WM_LINETIME_B: line time=0, ips line time=0
WM_LINETIME_C: line time=0, ips line time=0
WM_LP1: enabled, latency=2, fbc=3, primary=20, cursor=6, sprite=0
WM_LP2: enabled, latency=6, fbc=6, primary=393, cursor=18, sprite=0
WM_LP3: enabled, latency=8, fbc=8, primary=696, cursor=26, sprite=0
Primary A trickle feed = enabled
Sprite A trickle feed = enabled
Primary B trickle feed = enabled
Sprite B trickle feed = enabled
Primary C trickle feed = enabled
Sprite C trickle feed = enabled
DDB partitioning = 1/2
FBC watermark = enabled

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