[PATCH] drm/amdgpu: correct clock info for SRIOV

[Deucher, Alexander]

> -----Original Message-----
> From: Yu, Xiangliang
> Sent: Monday, June 05, 2017 10:33 PM
> To: Deucher, Alexander; amd-gfx at lists.freedesktop.org
> Subject: RE: [PATCH] drm/amdgpu: correct clock info for SRIOV
> 
> > > Currently, get clock info from default clk of pm if dpm is disable.
> > > Buf SRIOV doesn't support dpm and pm, can't get anything from pm.
> > > Only get clock info only from default clk of amdgpu for SRIOV.
> > >
> > > And driver get pm default clk also from amdgpu default clk and never
> > > be changed by others. So use amdgpu default clk value for SRIOV and
> > > non-dpm cases.
> >
> > This won't work for vega10 or Raven since we don't parse the default clock
> > info on them anymore due to atom firmware changes.
> 
> I don't get the info.
> Even so, we need to support this for VI family.

The default clocks are the boot clocks which don't reflect the actual clocks that chip is running it.  Assuming that is ok, the patch is:
Acked-by: Alex Deucher <alexander.deucher at amd.com>

> 
> >
> > Alex
> >
> > >
> > > Signed-off-by: Xiangliang Yu <Xiangliang.Yu at amd.com>
> > > ---
> > >  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> > > b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> > > index 4947f04..1935f07 100644
> > > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> > > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> > > @@ -530,8 +530,8 @@ static int amdgpu_info_ioctl(struct drm_device
> > > *dev, void *data, struct drm_file
> > >  			dev_info.max_engine_clock =
> > > amdgpu_dpm_get_sclk(adev, false) * 10;
> > >  			dev_info.max_memory_clock =
> > > amdgpu_dpm_get_mclk(adev, false) * 10;
> > >  		} else {
> > > -			dev_info.max_engine_clock = adev-
> > > >pm.default_sclk * 10;
> > > -			dev_info.max_memory_clock = adev-
> > > >pm.default_mclk * 10;
> > > +			dev_info.max_engine_clock = adev-
> > > >clock.default_sclk * 10;
> > > +			dev_info.max_memory_clock = adev-
> > > >clock.default_mclk * 10;
> > >  		}
> > >  		dev_info.enabled_rb_pipes_mask = adev-
> > > >gfx.config.backend_enable_mask;
> > >  		dev_info.num_rb_pipes = adev-
> > > >gfx.config.max_backends_per_se *
> > > --
> > > 2.7.4
> > >
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