[PATCH 00/20] drm/amdgpu: gfx off support

[Alex Deucher]

On Wed, Apr 18, 2018 at 8:22 PM, Huang Rui <ray.huang at amd.com> wrote:
> GFXOFF is the new GPU feature that save power consumption. It used RLC to
> poweroff the gfx engine dynamicly when there is no workload on gfx pipe and make
> gfx into "idle" state.
> 1. Add three additional RLC ucodes, and use psp to load them.
> 2. Revise RLC save restore list.
> 3. Enable CGPG (GFX power gating).
> 4. Enable gfxoff.
> 5. Revise suspend/resume sequence.
>
> Currently, only raven is able to support gfxoff at first. And after CQE do
> series rounds of testing, and there is no regression that bring by gfxoff
> feature till now.
>
> We support two types of gfxoff, and user is able to build them manually from
> firmware repo:
> 1. Real CGPG
>         $ make clean
>         $ make REAL_CGPG=1
> 2. Faked CGPG: (by default)
>         $ make clean
>         $ make
>
> Then configure to enable gfxoff with ppfeaturemask=0xffffbfff.

A couple of things we need to take care of before enabling this:
1. Need to switch it off when selecting stable pstate or profiling
mode in powerplay
2. Need to check if gfx is on before accessing the RLC_GPU_CLOCK_COUNT
registers.

Alex

>
> Thanks,
> Ray
>
> Huang Rui (20):
>   drm/amdgpu: update psp gfx if header
>   drm/amdgpu: add new rlc firmware header format v2.1
>   drm/amdgpu: add save restore list cntl gpm and srm firmware support
>   drm/amdgpu: enter rlc safe mode before set cgpg
>   drm/amdgpu: cleanup init power gating function
>   drm/amdgpu: revise init_rlc_save_restore_list behavior to support
>     latest register_list_format/register_restore table
>   drm/amdgpu: add setting powergating method for gfx9
>   drm/amd/powerplay: send CGPG smc message if PG is enabled for raven
>   drm/amdgpu: move PP_FEATURE_MASK to amd_shared header
>   drm/amdgpu: add gfxoff feature mask
>   drm/amdgpu: set gfxoff disabled by default
>   drm/amd/powerplay: add gfx off control function
>   drm/amd/powerplay: enable/disable gfxoff through smu
>   drm/amdgpu: use pp_feature member to store the mask
>   drm/amdgpu: clear gfxoff featue mask if the asic is not raven
>   drm/amd/powerplay: add control gfxoff enabling in late init
>   drm/amdgpu: it should disable gfxoff when system is going to suspend
>   drm/amdgpu: fix to disable powergating in hw_fini
>   drm/amdgpu: set CGPG if gfxoff is enabled for raven
>   drm/amd/powerplay: use the flag to decide whether send gfxoff smc
>     message
>
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h               |  16 ++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c        |   8 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h           |   2 -
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c           |   2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c           |  36 ++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c         |  51 ++++-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h         |  22 ++
>  drivers/gpu/drm/amd/amdgpu/ci_dpm.c               |   2 +-
>  drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c             | 233 +++++++++++++++-------
>  drivers/gpu/drm/amd/amdgpu/kv_dpm.c               |   2 +-
>  drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h           |  67 +++++--
>  drivers/gpu/drm/amd/amdgpu/psp_v10_0.c            |   9 +
>  drivers/gpu/drm/amd/amdgpu/soc15.c                |   5 +
>  drivers/gpu/drm/amd/include/amd_shared.h          |  19 ++
>  drivers/gpu/drm/amd/powerplay/amd_powerplay.c     |  20 +-
>  drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c       |   6 +-
>  drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c |  50 ++++-
>  drivers/gpu/drm/amd/powerplay/inc/hwmgr.h         |  19 +-
>  drivers/gpu/drm/amd/powerplay/inc/rv_ppsmc.h      |   1 +
>  include/uapi/drm/amdgpu_drm.h                     |   6 +
>  20 files changed, 447 insertions(+), 129 deletions(-)
>
> --
> 2.7.4
>
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