diff options
| author | Steven Price <steven.price@arm.com> | 2020-05-22 16:36:53 +0100 |
|---|---|---|
| committer | Steven Price <steven.price@arm.com> | 2020-06-19 10:59:58 +0100 |
| commit | b99773ef258e628bd53cab22d450a755b73b4d55 (patch) | |
| tree | a77147d70da0551aa82b8d9e29403bc28c6e7bb5 /drivers/gpu/drm/panfrost | |
| parent | c8fa5b7c7a7e54ec64edc3904ee794b5ccf12b8b (diff) | |
drm/panfrost: Fix inbalance of devfreq record_busy/idle()
The calls to panfrost_devfreq_record_busy() and
panfrost_devfreq_record_idle() must be balanced to ensure that the
devfreq utilisation is correctly reported. But there are two cases where
this doesn't work correctly.
In panfrost_job_hw_submit() if pm_runtime_get_sync() fails or the
WARN_ON() fires then no call to panfrost_devfreq_record_busy() is made,
but when the job times out the corresponding _record_idle() call is
still made in panfrost_job_timedout(). Move the call up to ensure that
it always happens.
Secondly panfrost_job_timedout() only makes a single call to
panfrost_devfreq_record_idle() even if it is cleaning up multiple jobs.
Move the call inside the loop to ensure that the number of
_record_idle() calls matches the number of _record_busy() calls.
Fixes: 9e62b885f715 ("drm/panfrost: Simplify devfreq utilisation tracking")
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200522153653.40754-1-steven.price@arm.com
Diffstat (limited to 'drivers/gpu/drm/panfrost')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_job.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index b2f09c038d35..ac87ef675e8a 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -145,6 +145,8 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js) u64 jc_head = job->jc; int ret; + panfrost_devfreq_record_busy(pfdev); + ret = pm_runtime_get_sync(pfdev->dev); if (ret < 0) return; @@ -155,7 +157,6 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js) } cfg = panfrost_mmu_as_get(pfdev, &job->file_priv->mmu); - panfrost_devfreq_record_busy(pfdev); job_write(pfdev, JS_HEAD_NEXT_LO(js), jc_head & 0xFFFFFFFF); job_write(pfdev, JS_HEAD_NEXT_HI(js), jc_head >> 32); @@ -410,12 +411,12 @@ static void panfrost_job_timedout(struct drm_sched_job *sched_job) for (i = 0; i < NUM_JOB_SLOTS; i++) { if (pfdev->jobs[i]) { pm_runtime_put_noidle(pfdev->dev); + panfrost_devfreq_record_idle(pfdev); pfdev->jobs[i] = NULL; } } spin_unlock_irqrestore(&pfdev->js->job_lock, flags); - panfrost_devfreq_record_idle(pfdev); panfrost_device_reset(pfdev); for (i = 0; i < NUM_JOB_SLOTS; i++) |