On Mon, Dec 21, 2020 at 9:59 PM Daniel Lezcano
<daniel.lezc...@linaro.org> wrote:
>
> On 21/12/2020 14:52, Kai-Heng Feng wrote:
> > We are seeing thermal shutdown on Intel based mobile workstations, the
> > shutdown happens during the first trip handle in
> > thermal_zone_device_register():
> > kernel: thermal thermal_zone15: critical temperature reached (101 C),
> > shutting down
> >
> > However, we shouldn't do a thermal shutdown here, since
> > 1) We may want to use a dedicated daemon, Intel's thermald in this case,
> > to handle thermal shutdown.
> >
> > 2) For ACPI based system, _CRT doesn't mean shutdown unless it's inside
> > ThermalZone namespace. ACPI Spec, 11.4.4 _CRT (Critical Temperature):
> > "... If this object it present under a device, the device’s driver
> > evaluates this object to determine the device’s critical cooling
> > temperature trip point. This value may then be used by the device’s
> > driver to program an internal device temperature sensor trip point."
> >
> > So a "critical trip" here merely means we should take a more aggressive
> > cooling method.
> >
> > As int340x device isn't present under ACPI ThermalZone, override the
> > default .critical callback to prevent surprising thermal shutdown.
> >
> > Signed-off-by: Kai-Heng Feng <kai.heng.f...@canonical.com>
>
> I'll submit those changes for v5.11-rc1 and change the subject by:
>
> thermal: int340x: Fix unexpected shutdown at critical temperature
> thermal: pch: Fix unexpected shutdown at critical temperature
>
> Sounds good ?
Sounds good to me. Thanks!
Kai-Heng
>
> > ---
> > drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 6 ++++++
> > .../thermal/intel/int340x_thermal/int340x_thermal_zone.c | 6 ++++++
> > 2 files changed, 12 insertions(+)
> >
> > diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > index 823354a1a91a..9778a6dba939 100644
> > --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > @@ -431,9 +431,15 @@ static int int3400_thermal_change_mode(struct
> > thermal_zone_device *thermal,
> > return result;
> > }
> >
> > +static void int3400_thermal_critical(struct thermal_zone_device *thermal)
> > +{
> > + dev_dbg(&thermal->device, "%s: critical temperature reached\n",
> > thermal->type);
> > +}
> > +
> > static struct thermal_zone_device_ops int3400_thermal_ops = {
> > .get_temp = int3400_thermal_get_temp,
> > .change_mode = int3400_thermal_change_mode,
> > + .critical = int3400_thermal_critical,
> > };
> >
> > static struct thermal_zone_params int3400_thermal_params = {
> > diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> > b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> > index 6e479deff76b..d1248ba943a4 100644
> > --- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> > +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> > @@ -146,12 +146,18 @@ static int int340x_thermal_get_trip_hyst(struct
> > thermal_zone_device *zone,
> > return 0;
> > }
> >
> > +static void int340x_thermal_critical(struct thermal_zone_device *zone)
> > +{
> > + dev_dbg(&zone->device, "%s: critical temperature reached\n",
> > zone->type);
> > +}
> > +
> > static struct thermal_zone_device_ops int340x_thermal_zone_ops = {
> > .get_temp = int340x_thermal_get_zone_temp,
> > .get_trip_temp = int340x_thermal_get_trip_temp,
> > .get_trip_type = int340x_thermal_get_trip_type,
> > .set_trip_temp = int340x_thermal_set_trip_temp,
> > .get_trip_hyst = int340x_thermal_get_trip_hyst,
> > + .critical = int340x_thermal_critical,
> > };
> >
> > static int int340x_thermal_get_trip_config(acpi_handle handle, char *name,
> >
>
>
> --
> <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
>
> Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
> <http://twitter.com/#!/linaroorg> Twitter |
> <http://www.linaro.org/linaro-blog/> Blog
