[Intel-gfx] [PATCH] Revert "drm/i915/hwmon: Enable PL1 power limit"

[Rodrigo Vivi]

On Wed, Feb 15, 2023 at 08:24:51AM -0800, Dixit, Ashutosh wrote:
> On Wed, 15 Feb 2023 07:37:30 -0800, Jani Nikula wrote:
> >
> > On Wed, 08 Feb 2023, Rodrigo Vivi <rodrigo.vivi at intel.com> wrote:
> > > On Wed, Feb 08, 2023 at 11:03:12AM -0800, Ashutosh Dixit wrote:
> > >> This reverts commit 0349c41b05968befaffa5fbb7e73d0ee6004f610.
> > >>
> > >> 0349c41b0596 ("drm/i915/hwmon: Enable PL1 power limit") is incorrect and
> > >> caused a major regression on ATSM. The change enabled the PL1 power limit
> > >> but FW sets the default value of the PL1 limit to 0 which implies HW now
> > >> works at minimum power and therefore the lowest effective frequency. This
> > >> means all workloads now run slower resulting in even GuC FW load operations
> > >> timing out, rendering ATSM unusable.
> > >>
> > >> A different solution to the original issue of the PL1 limit being disabled
> > >> on ATSM is needed but till that is developed, revert 0349c41b0596.
> > >>
> > >> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8062
> > >
> > > pushed to drm-intel-next and removed from drm-intel-fixes.
> > >
> > > Thanks for the quick reaction.
> >
> > Please always add Fixes: tags also to reverts.
> >
> > I suppose we should fix dim to also detect reverts, but I ended up
> > cherry-picking and pushing the original commit out to
> > drm-intel-next-fixes before realizing it's been reverted.
> 
> Oops, sorry!

That's my mistake. I should had thought about this when pushing
and removing from the fixes. I just realized yet, when this patch
showed up in my -fixes cherry-pick again, but without the revert.

I'm sorry.