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Message-ID: <CAP245DVDMNisH1BavQuKwmxOefgG=Pw_RFBhyiecQ44g1gLZig@mail.gmail.com>
Date: Tue, 30 Jun 2020 17:19:34 +0530
From: Amit Kucheria <amit.kucheria@...aro.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Zhang Rui <rui.zhang@...el.com>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Ram Chandrasekar <rkumbako@...eaurora.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/5] thermal: core: Add notifications call in the framework
On Thu, Jun 25, 2020 at 8:15 PM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
> The generic netlink protocol is implemented but the different
> notification functions are not yet connected to the core code.
>
> These changes add the notification calls in the different
> corresponding places.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
> drivers/thermal/thermal_core.c | 21 +++++++++++++++++++++
> drivers/thermal/thermal_helpers.c | 11 +++++++++--
> drivers/thermal/thermal_sysfs.c | 15 ++++++++++++++-
> 3 files changed, 44 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 58c95aeafb7f..1388c03d1190 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -215,6 +215,8 @@ int thermal_zone_device_set_policy(struct thermal_zone_device *tz,
> mutex_unlock(&tz->lock);
> mutex_unlock(&thermal_governor_lock);
>
> + thermal_notify_tz_gov_change(tz->id, policy);
> +
> return ret;
> }
>
> @@ -406,12 +408,25 @@ static void handle_critical_trips(struct thermal_zone_device *tz,
> static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
> {
> enum thermal_trip_type type;
> + int trip_temp, hyst = 0;
>
> /* Ignore disabled trip points */
> if (test_bit(trip, &tz->trips_disabled))
> return;
>
> + tz->ops->get_trip_temp(tz, trip, &trip_temp);
> tz->ops->get_trip_type(tz, trip, &type);
> + if (tz->ops->get_trip_hyst)
> + tz->ops->get_trip_hyst(tz, trip, &hyst);
> +
> + if (tz->last_temperature != THERMAL_TEMP_INVALID) {
> + if (tz->last_temperature < trip_temp &&
> + tz->temperature >= trip_temp)
> + thermal_notify_tz_trip_up(tz->id, trip);
> + if (tz->last_temperature >= trip_temp &&
> + tz->temperature < (trip_temp - hyst))
> + thermal_notify_tz_trip_down(tz->id, trip);
> + }
>
> if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
> handle_critical_trips(tz, trip, type);
> @@ -443,6 +458,8 @@ static void update_temperature(struct thermal_zone_device *tz)
> mutex_unlock(&tz->lock);
>
> trace_thermal_temperature(tz);
> +
> + thermal_genl_sampling_temp(tz->id, temp);
Does this need any rate limiting? How many times is update_temperature
called on a platform with a dozen sensors?
> }
>
> static void thermal_zone_device_init(struct thermal_zone_device *tz)
> @@ -1398,6 +1415,8 @@ thermal_zone_device_register(const char *type, int trips, int mask,
> if (atomic_cmpxchg(&tz->need_update, 1, 0))
> thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
>
> + thermal_notify_tz_create(tz->id, tz->type);
> +
> return tz;
>
> unregister:
> @@ -1469,6 +1488,8 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
> ida_destroy(&tz->ida);
> mutex_destroy(&tz->lock);
> device_unregister(&tz->device);
> +
> + thermal_notify_tz_delete(tz->id);
> }
> EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);
>
> diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
> index 6ed24b4e23d3..7893ace1d90f 100644
> --- a/drivers/thermal/thermal_helpers.c
> +++ b/drivers/thermal/thermal_helpers.c
> @@ -175,6 +175,14 @@ void thermal_zone_set_trips(struct thermal_zone_device *tz)
> mutex_unlock(&tz->lock);
> }
>
> +void thermal_cdev_set_cur_state(struct thermal_cooling_device *cdev, int target)
> +{
> + if (cdev->ops->set_cur_state(cdev, target))
> + return;
> + thermal_notify_cdev_update(cdev->id, target);
> + thermal_cooling_device_stats_update(cdev, target);
> +}
> +
> void thermal_cdev_update(struct thermal_cooling_device *cdev)
> {
> struct thermal_instance *instance;
> @@ -192,8 +200,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev)
> target = instance->target;
> }
>
> - if (!cdev->ops->set_cur_state(cdev, target))
> - thermal_cooling_device_stats_update(cdev, target);
> + thermal_cdev_set_cur_state(cdev, target);
>
> mutex_unlock(&cdev->lock);
> trace_cdev_update(cdev, target);
> diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
> index aa99edb4dff7..ff449943f757 100644
> --- a/drivers/thermal/thermal_sysfs.c
> +++ b/drivers/thermal/thermal_sysfs.c
> @@ -124,7 +124,8 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
> {
> struct thermal_zone_device *tz = to_thermal_zone(dev);
> int trip, ret;
> - int temperature;
> + int temperature, hyst = 0;
> + enum thermal_trip_type type;
>
> if (!tz->ops->set_trip_temp)
> return -EPERM;
> @@ -139,6 +140,18 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr,
> if (ret)
> return ret;
>
> + if (tz->ops->get_trip_hyst) {
> + ret = tz->ops->get_trip_hyst(tz, trip, &hyst);
> + if (ret)
> + return ret;
> + }
> +
> + ret = tz->ops->get_trip_type(tz, trip, &type);
> + if (ret)
> + return ret;
> +
> + thermal_notify_tz_trip_change(tz->id, trip, type, temperature, hyst);
> +
> thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED);
>
> return count;
> --
> 2.17.1
>
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