[PATCH] drm/amdgpu: show gfx clock gating status to user

[Zhu, Rex]

As talked with David. They not only need to know whether the CG/PG is supported, but also need to 
know current CG/PG state. 

we added the profile mode, so in runtime, user can disable/enable cg. 
Then user wanted to confirm current cg state.

So we may need to export cg/pg mask and current cg/pg state.

Best Regards
Rex


-----Original Message-----
From: Huang Rui [mailto:ray.huang at amd.com] 
Sent: Wednesday, January 04, 2017 10:22 AM
To: Deucher, Alexander
Cc: amd-gfx at lists.freedesktop.org; Zhu, Rex; Mao, David; Fu, Ping
Subject: Re: [PATCH] drm/amdgpu: show gfx clock gating status to user

On Tue, Jan 03, 2017 at 11:02:09PM +0800, Deucher, Alexander wrote:
> > -----Original Message-----
> > From: Huang Rui [mailto:ray.huang at amd.com]
> > Sent: Tuesday, January 03, 2017 5:47 AM
> > To: Deucher, Alexander; amd-gfx at lists.freedesktop.org
> > Cc: Zhu, Rex; Mao, David; Fu, Ping; Huang, Ray
> > Subject: [PATCH] drm/amdgpu: show gfx clock gating status to user
> > 
> > Signed-off-by: Huang Rui <ray.huang at amd.com>
> > ---
> >  drivers/gpu/drm/amd/amdgpu/amdgpu.h    | 1 +
> >  drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 5 +++++  
> > drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c  | 2 ++  
> > drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c  | 2 ++  
> > drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c  | 3 +++
> >  5 files changed, 13 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > index 96eeea7..989d311 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > @@ -1033,6 +1033,7 @@ struct amdgpu_gfx {
> >  	struct amdgpu_irq_src		priv_inst_irq;
> >  	/* gfx status */
> >  	uint32_t			gfx_current_status;
> > +	bool				cg_enabled;
> >  	/* ce ram size*/
> >  	unsigned			ce_ram_size;
> >  	struct amdgpu_cu_info		cu_info;
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > index a7c7657..10f2eab 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
> > @@ -1543,6 +1543,11 @@ static int amdgpu_debugfs_pm_info(struct 
> > seq_file *m, void *data)
> >  	struct amdgpu_device *adev = dev->dev_private;
> >  	struct drm_device *ddev = adev->ddev;
> > 
> > +	if (adev->gfx.cg_enabled)
> > +		seq_printf(m, "GFX Clock Gating: Enabled\n");
> > +	else
> > +		seq_printf(m, "GFX Clock Gating: Disabled\n");
> > +
> 
> 
> I think it would be better to print the cg_flags and pg_flags (both as a mask and in human readable form) so we know exactly cg and pg features are enabled.
> 

It's probable better. Let me revise this patch and send it later.

Thanks,
Rui