[PART1 PATCH 0/8] Introduce a method to get clock gating status dynamically

[Huang Rui]

This series patches implement to get the clock gating status
dynamically into debugfs. User will enter profiling mode to runtime
disable clockgating, so it needs an interface to expose clock gating
states. Part 1 works for VI, I will implement it on CI/SI in following
days.

Here is the example on Fiji:

root at jenkins-All-Series:/home/jenkins# cat /sys/kernel/debug/dri/64/amdgpu_pm_info
Clock Gating Flags Mask: 0x3dfff
        Medium Grain Clock Gating: On
        Medium Grain memory Light Sleep: On
        Coarse Grain Clock Gating: On
        Coarse Grain memory Light Sleep: On
        Coarse Grain Tree Shader: On
        Coarse Grain Tree Shader Light Sleep: On
        Command Processor Light Sleep: On
        Run List Controller Light Sleep: On
        Memory Controller Light Sleep: On
        Memory Controller Medium Grain Clock Gating: On
        System Direct Memory Access Light Sleep: On
        System Direct Memory Access Medium Grain Clock Gating: On
        Bus Interface Light Sleep: On
        Universal Video Decoder Medium Grain Clock Gating: Off
        Video Coding Engine Medium Grain Clock Gating: On
        Host Data Path Light Sleep: On
        Host Data Path Medium Grain Clock Gating: On
        Rom Medium Grain Clock Gating: On
...

Thanks,
Rui

Huang Rui (8):
  drm/amdgpu: introduce an interface to get clock gating status
    dynamically
  drm/amdgpu: add parse clock gating state
  drm/amdgpu: add clockgating_state method for gfx v8
  drm/amdgpu: add clockgating_state method for gmc v8
  drm/amdgpu: add clockgating_state method for sdma v3
  drm/amdgpu: add clockgating_state method for vi common
  drm/amdgpu: add clockgating_state method for uvd v5&v6
  drm/amdgpu: add clockgating_state method for vce v3

 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 12 ++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c     | 99 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c      | 40 ++++++++++++
 drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c      | 16 +++++
 drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c     | 17 +++++
 drivers/gpu/drm/amd/amdgpu/uvd_v5_0.c      | 12 ++++
 drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c      | 12 ++++
 drivers/gpu/drm/amd/amdgpu/vce_v3_0.c      | 18 ++++++
 drivers/gpu/drm/amd/amdgpu/vi.c            | 27 ++++++++
 drivers/gpu/drm/amd/include/amd_shared.h   |  2 +
 11 files changed, 256 insertions(+)

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2.7.4