[Intel-gfx] [PATCH 2/3] drm/i915/hwmon: Add HWMON energy support

[Gupta, Anshuman]

> -----Original Message-----
> From: Dixit, Ashutosh <ashutosh.dixit at intel.com>
> Sent: Wednesday, May 25, 2022 10:27 AM
> To: Nilawar, Badal <badal.nilawar at intel.com>
> Cc: intel-gfx at lists.freedesktop.org; Gupta, Anshuman
> <anshuman.gupta at intel.com>; Ewins, Jon <jon.ewins at intel.com>; Tauro,
> Riana <riana.tauro at intel.com>; Joonas Lahtinen
> <joonas.lahtinen at linux.intel.com>
> Subject: Re: [PATCH 2/3] drm/i915/hwmon: Add HWMON energy support
> 
> On Mon, 23 May 2022 04:08:40 -0700, Badal Nilawar wrote:
> >
> > From: Dale B Stimson <dale.b.stimson at intel.com>
> >
> > As part of the System Managemenent Interface (SMI), use the HWMON
> > subsystem to display energy utilization
> 
> Energy seems to be hardly ever exposed in the kernel. Searching for
> 'hwmon_energy' shows only a single hit in drivers/hwmon/scmi-hwmon.c.
> We should see if there are real consumers for this and the reason for
> exposing this.
rc6_idle test opens energy sys fs to test the Entergy numbers via rapl interface(AFAIR that interface is via x86 MSR) but that interface is not available to use for dgfx. If we can use hwmon energy interface. It can be leverage for IGT tests?

Thanks,
Anshuman Gupta.