diff options
| author | Sarah Walker <sarah.walker@imgtec.com> | 2023-11-22 19:34:33 +0300 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2023-11-23 11:01:46 +0300 |
| commit | 727538a4bbff07736ecfd704efd7e21718fca3e4 (patch) | |
| tree | 5eb5f5382274583f9f3fb5120b1d2eecce4ecfc6 /drivers/gpu/drm/imagination/pvr_device.h | |
| parent | ff5f643de0bf27874c4033cd57a0bd034b5c7d11 (diff) | |
| download | linux-727538a4bbff07736ecfd704efd7e21718fca3e4.tar.xz | |
drm/imagination: Implement power management
Add power management to the driver, using runtime pm. The power off
sequence depends on firmware commands which are not implemented in this
patch.
Changes since v8:
- Corrected license identifiers
Changes since v5:
- Use RUNTIME_PM_OPS() to declare PM callbacks
- Add Kconfig dependency on CONFIG_PM
Changes since v4:
- Suspend runtime PM before unplugging device on rmmod
Changes since v3:
- Don't power device when calling pvr_device_gpu_fini()
- Documentation for pvr_dev->lost has been improved
- pvr_power_init() renamed to pvr_watchdog_init()
- Use drm_dev_{enter,exit}
Changes since v2:
- Use runtime PM
- Implement watchdog
Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/e09af4ef1ff514e1d6d7f97c7c5032c643c56f9c.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_device.h')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_device.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h index bfc853ffd58f..771ba879f02d 100644 --- a/drivers/gpu/drm/imagination/pvr_device.h +++ b/drivers/gpu/drm/imagination/pvr_device.h @@ -141,6 +141,28 @@ struct pvr_device { * before submitting the next job. */ atomic_t mmu_flush_cache_flags; + + struct { + /** @work: Work item for watchdog callback. */ + struct delayed_work work; + + /** @old_kccb_cmds_executed: KCCB command execution count at last watchdog poll. */ + u32 old_kccb_cmds_executed; + + /** @kccb_stall_count: Number of watchdog polls KCCB has been stalled for. */ + u32 kccb_stall_count; + } watchdog; + + /** + * @lost: %true if the device has been lost. + * + * This variable is set if the device has become irretrievably unavailable, e.g. if the + * firmware processor has stopped responding and can not be revived via a hard reset. + */ + bool lost; + + /** @sched_wq: Workqueue for schedulers. */ + struct workqueue_struct *sched_wq; }; /** |