[Intel-gfx] [PATCH 3/3] drm/i915/hwmon: Add HWMON current voltage support

[Dixit, Ashutosh]

On Fri, 10 Jun 2022 15:35:23 -0700, Dixit, Ashutosh wrote:
>
> On Mon, 23 May 2022 04:08:41 -0700, Badal Nilawar wrote:
> >
> > @@ -370,6 +386,41 @@ i915_power_write(struct i915_hwmon_drvdata *ddat, u32 attr, int chan, long val)
> >	return ret;
> >  }
> >
> > +static umode_t
> > +i915_in_is_visible(const struct i915_hwmon_drvdata *ddat, u32 attr)
> > +{
> > +	struct drm_i915_private *i915 = ddat->dd_uncore->i915;
> > +
> > +	switch (attr) {
> > +	case hwmon_in_input:
> > +		return (IS_DG1(i915) || IS_DG2(i915)) ? 0444 : 0;
> > +	default:
> > +		return 0;
> > +	}
> > +
> > +	return 0444;
>
> Don't return 0444 by default, let's just delete this line (return 0 by
> default from the switch statement).
>
> > +}
> > +
> > +static int
> > +i915_in_read(struct i915_hwmon_drvdata *ddat, u32 attr, long *val)
> > +{
> > +	struct i915_hwmon *hwmon = ddat->dd_hwmon;
> > +	intel_wakeref_t wakeref;
> > +	u32 reg_value;
> > +
> > +	switch (attr) {
> > +	case hwmon_in_input:
> > +		with_intel_runtime_pm(ddat->dd_uncore->rpm, wakeref)
> > +			reg_value = intel_uncore_read(ddat->dd_uncore, hwmon->rg.gt_perf_status);
> > +		*val = DIV_ROUND_CLOSEST(REG_FIELD_GET(GEN12_VOLTAGE_MASK, reg_value) * 25, 10);
> > +		break;
> > +	default:
> > +		return -EOPNOTSUPP;
> > +	}
> > +
> > +	return 0;
>
> Don't return 0 by default, let's just delete this line (return -EOPNOTSUPP
> by default from the switch statement).

Sorry this one is ok, or return 0 from 'case hwmon_in_input' and delete
this line.