lkml.org 
[lkml]   [2017]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
SubjectRe: [PATCH v2 2/2] ACPI / Sleep: Check low power idle constraints for debug only
From
Date
On Thu, 2017-08-10 at 22:07 +0000, Mario.Limonciello@dell.com wrote:
>
> >
> >
[...]

> > +
> > + ret = acpi_device_get_power(adev, &state);
> > + if (!ret)
> > + pr_debug("LPI: %s required min power state
> > %d, current
> > power state %d, real power state %d\n",
> > +  lpi_constraints_table[i].name,
> > +  lpi_constraints_table[i].min_dsta
> > te,
> > +  adev->power.state, state);
> Isn't this superfluous to be showing the state returned from
> acpi_device_get_power and
> also probing directly at the state? You can't just rely on the
> information you got
> back from apci_device_get_power?
They can be different as one is real power state and the other is what
was set.
For example on Dell 9365 it shows

[ 1924.393653] LPI: \_SB.PCI0.XHC required min power state 3, current
power state 3, real power state 255 

>
> >
> > +
> > + if (adev->flags.power_manageable && adev-
> > >power.state <
> > + lpi_constraints_table[i].m
> > in_dstate)
> > + pr_info("LPI: Constraint [%s] not
> > matched\n",
> > +  lpi_constraints_table[i].name);
> Similarly here, can't you just compare against &state instead?
>
The problem then the check will fail for XHCI on Dell 9365. So not
using "state".

Thanks,
Srinivas
> >
> > + }
> > +}
> > +
> >  static void acpi_sleep_run_lps0_dsm(unsigned int func)
> >  {
> >   union acpi_object *out_obj;
> > @@ -729,6 +886,9 @@ static int lps0_device_attach(struct
> > acpi_device *adev,
> >     "_DSM function 0 evaluation
> > failed\n");
> >   }
> >   ACPI_FREE(out_obj);
> > +
> > + lpi_device_get_constraints();
> > +
> >   return 0;
> >  }
> >
> > @@ -773,6 +933,8 @@ static void acpi_freeze_wake(void)
> >    */
> >   if (acpi_sci_irq_valid() &&
> >       !irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq)))
> > {
> > + if (pm_debug_messages_enabled())
> > + lpi_check_constraints();
> >   pm_system_cancel_wakeup();
> >   s2idle_wakeup = true;
> >   }
> > --
> > 2.7.5

\
 
 \ /
  Last update: 2017-08-11 00:54    [W:0.090 / U:0.696 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site