drivers/gpu/drm/panfrost/panfrost_devfreq.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright 2019 Collabora ltd. */
   3
   4 #ifndef __PANFROST_DEVFREQ_H__
   5 #define __PANFROST_DEVFREQ_H__
   6
   7 #include <linux/devfreq.h>
   8 #include <linux/spinlock.h>
   9 #include <linux/ktime.h>
  10
  11 struct devfreq;
  12 struct thermal_cooling_device;
  13
  14 struct panfrost_device;
  15
  16 struct panfrost_devfreq {
  17         struct devfreq *devfreq;
  18         struct thermal_cooling_device *cooling;
  19         struct devfreq_simple_ondemand_data gov_data;
  20         bool opp_of_table_added;
  21
  22         unsigned long current_frequency;
  23         unsigned long fast_rate;
  24
  25         ktime_t busy_time;
  26         ktime_t idle_time;
  27         ktime_t time_last_update;
  28         int busy_count;
  29         /*
  30          * Protect busy_time, idle_time, time_last_update and busy_count
  31          * because these can be updated concurrently between multiple jobs.
  32          */
  33         spinlock_t lock;
  34 };
  35
  36 int panfrost_devfreq_init(struct panfrost_device *pfdev);
  37 void panfrost_devfreq_fini(struct panfrost_device *pfdev);
  38
  39 void panfrost_devfreq_resume(struct panfrost_device *pfdev);
  40 void panfrost_devfreq_suspend(struct panfrost_device *pfdev);
  41
  42 void panfrost_devfreq_record_busy(struct panfrost_devfreq *devfreq);
  43 void panfrost_devfreq_record_idle(struct panfrost_devfreq *devfreq);
  44
  45 #endif /* __PANFROST_DEVFREQ_H__ */