[Intel-gfx] [PATCH 2/7] drm/i915/hwmon: Add HWMON current voltage support

[Dixit, Ashutosh]

On Mon, 03 Oct 2022 13:56:05 -0700, Andi Shyti wrote:

Hi Andi,

Badal is out for a bit so I am posting this version of the patches.

>
> Hi Badal,
>
> [...]
>
> >  static void
> >  hwm_get_preregistration_info(struct drm_i915_private *i915)
> >  {
> > +	struct i915_hwmon *hwmon = i915->hwmon;
> > +
> > +	if (IS_DG1(i915) || IS_DG2(i915))
>
> why not GRAPHICS_VER(i915) >= 12 here?

Thanks for catching this, because GEN12_RPSTAT1 is indeed available for all
Gen12+. It was done this way because the voltage bits of GEN12_RPSTAT1 are
only available for DG1/DG2. Anyway in v9 I have changed this to just:

	/* Available for all Gen12+/dGfx */
	hwmon->rg.gt_perf_status = GEN12_RPSTAT1;

That is because hwmon is only availbable for dGfx (there's a check in Patch
1). Also, because of this change the 'IS_DG1(i915) || IS_DG2(i915)' check
has been moved to hwm_in_is_visible.

Thanks.
--
Ashutosh

> > +		hwmon->rg.gt_perf_status = GEN12_RPSTAT1;
> > +	else
> > +		hwmon->rg.gt_perf_status = INVALID_MMIO_REG;
> >  }
> >
> >  void i915_hwmon_register(struct drm_i915_private *i915)
> > --
> > 2.25.1