Re: [PATCH] thermal: intel_powerclamp: Return last requested state as cur_state

[srinivas pandruvada]

On Thu, 2023-02-02 at 17:44 +0100, Rafael J. Wysocki wrote:
> On Wed, Feb 1, 2023 at 10:07 PM Srinivas Pandruvada
> <srinivas.pandruvada@xxxxxxxxxxxxxxx> wrote:
> > 
> > When the user is reading cur_state from the thermal cooling device
> > for
> > Intel powerclamp device:
> > - It returns the idle ratio from Package C-state counters when
> > there is active idle injection session.
> > - -1, when there is no active idle injection session.
> > 
> > This information is not very useful as the package C-state counters
> > vary
> > a lot from read to read. Instead just return the last requested
> > cur_state.
> > 
> > Signed-off-by: Srinivas Pandruvada
> > <srinivas.pandruvada@xxxxxxxxxxxxxxx>
> > ---
> >  drivers/thermal/intel/intel_powerclamp.c | 12 +-----------
> >  1 file changed, 1 insertion(+), 11 deletions(-)
> > 
> > diff --git a/drivers/thermal/intel/intel_powerclamp.c
> > b/drivers/thermal/intel/intel_powerclamp.c
> > index 2f4cbfdf26a0..72a45cf2708c 100644
> > --- a/drivers/thermal/intel/intel_powerclamp.c
> > +++ b/drivers/thermal/intel/intel_powerclamp.c
> > @@ -590,17 +590,7 @@ static int powerclamp_get_max_state(struct
> > thermal_cooling_device *cdev,
> >  static int powerclamp_get_cur_state(struct thermal_cooling_device
> > *cdev,
> >                                  unsigned long *state)
> >  {
> > -       if (clamping) {
> > -               if (poll_pkg_cstate_enable)
> > -                       *state = pkg_cstate_ratio_cur;
> > -               else
> > -                       *state = set_target_ratio;
> > -       } else {
> > -               /* to save power, do not poll idle ratio while not
> > clamping */
> > -               *state = -1; /* indicates invalid state */
> > -       }
> > -
> > -       return 0;
> > +       return set_target_ratio;
> 
> *state = set_target_ratio;
> return 0;
> 
Sorry.

What a blunder! Sent patch from 37000 ft. Should never do that.

Thanks,
Srinivas


> >  }
> > 
> >  static int powerclamp_set_cur_state(struct thermal_cooling_device
> > *cdev,
> > --
> 
> And please rebase it on top of the idle_inject series (which is being
> added to my bleeding-edge branch right now).