linux/drivers/gpu/drm/panfrost/panfrost_devfreq.h
Clément Péron fd587ff01d drm/panfrost: add regulators to devfreq
Some OPP tables specify voltage for each frequency. Devfreq can
handle these regulators but they should be get only 1 time to avoid
issue and know who is in charge.

If OPP table is probe don't init regulator.

Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200710095409.407087-11-peron.clem@gmail.com
2020-08-07 10:11:26 -06:00

43 lines
1.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright 2019 Collabora ltd. */
#ifndef __PANFROST_DEVFREQ_H__
#define __PANFROST_DEVFREQ_H__
#include <linux/spinlock.h>
#include <linux/ktime.h>
struct devfreq;
struct opp_table;
struct thermal_cooling_device;
struct panfrost_device;
struct panfrost_devfreq {
struct devfreq *devfreq;
struct opp_table *regulators_opp_table;
struct thermal_cooling_device *cooling;
bool opp_of_table_added;
ktime_t busy_time;
ktime_t idle_time;
ktime_t time_last_update;
int busy_count;
/*
* Protect busy_time, idle_time, time_last_update and busy_count
* because these can be updated concurrently between multiple jobs.
*/
spinlock_t lock;
};
int panfrost_devfreq_init(struct panfrost_device *pfdev);
void panfrost_devfreq_fini(struct panfrost_device *pfdev);
void panfrost_devfreq_resume(struct panfrost_device *pfdev);
void panfrost_devfreq_suspend(struct panfrost_device *pfdev);
void panfrost_devfreq_record_busy(struct panfrost_devfreq *devfreq);
void panfrost_devfreq_record_idle(struct panfrost_devfreq *devfreq);
#endif /* __PANFROST_DEVFREQ_H__ */