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| author | Clément Péron <peron.clem@gmail.com> | 2020-07-10 11:54:00 +0200 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2020-08-07 10:11:26 -0600 |
| commit | ed85df3f60740bb4be23fbc2db283d59b361a834 (patch) | |
| tree | cdc3736b348bdab97456effcd549f5539e3a5a89 /drivers/gpu/drm/panfrost/panfrost_devfreq.h | |
| parent | 9bfacfc82f903b066b0b63460d5b7943705048a4 (diff) | |
| download | kernel_replicant_linux-ed85df3f60740bb4be23fbc2db283d59b361a834.tar.gz kernel_replicant_linux-ed85df3f60740bb4be23fbc2db283d59b361a834.tar.bz2 kernel_replicant_linux-ed85df3f60740bb4be23fbc2db283d59b361a834.zip | |
drm/panfrost: use spinlock instead of atomic
Convert busy_count to a simple int protected by spinlock.
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/20200710095409.407087-6-peron.clem@gmail.com
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_devfreq.h')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_devfreq.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h index 0697f8d5aa34..3392df1020be 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h @@ -4,6 +4,7 @@ #ifndef __PANFROST_DEVFREQ_H__ #define __PANFROST_DEVFREQ_H__ +#include <linux/spinlock.h> #include <linux/ktime.h> struct devfreq; @@ -14,10 +15,16 @@ struct panfrost_device; struct panfrost_devfreq { struct devfreq *devfreq; struct thermal_cooling_device *cooling; + ktime_t busy_time; ktime_t idle_time; ktime_t time_last_update; - atomic_t busy_count; + 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); |