From: Rob Clark <robdclark@xxxxxxxxxxxx>
With system suspend using pm_runtime_force_suspend() we can't rely on
the pm_runtime_get_if_in_use() trick to deal with devfreq callbacks
after (or racing with) suspend. So flush any pending idle or boost
work in the suspend path.
v2: s/ret/remaining [sboyd], and switch to using active_submits count
to ensure we aren't racing with submit cleanup (and devfreq idle
work getting scheduled, etc)
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
drivers/gpu/drm/msm/msm_gpu_devfreq.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
index 62405e980925..9bf319be11f6 100644
--- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c
+++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
@@ -133,6 +133,18 @@ void msm_devfreq_init(struct msm_gpu *gpu)
CLOCK_MONOTONIC, HRTIMER_MODE_REL);
}
+static void cancel_idle_work(struct msm_gpu_devfreq *df)
+{
+ hrtimer_cancel(&df->idle_work.timer);
+ kthread_cancel_work_sync(&df->idle_work.work);
+}
+
+static void cancel_boost_work(struct msm_gpu_devfreq *df)
+{
+ hrtimer_cancel(&df->boost_work.timer);
+ kthread_cancel_work_sync(&df->boost_work.work);
+}
+
void msm_devfreq_cleanup(struct msm_gpu *gpu)
{
struct msm_gpu_devfreq *df = &gpu->devfreq;
@@ -152,7 +164,12 @@ void msm_devfreq_resume(struct msm_gpu *gpu)
void msm_devfreq_suspend(struct msm_gpu *gpu)
{
- devfreq_suspend_device(gpu->devfreq.devfreq);
+ struct msm_gpu_devfreq *df = &gpu->devfreq;
+
+ devfreq_suspend_device(df->devfreq);
+
+ cancel_idle_work(df);
+ cancel_boost_work(df);
}
static void msm_devfreq_boost_work(struct kthread_work *work)
@@ -196,7 +213,7 @@ void msm_devfreq_active(struct msm_gpu *gpu)
/*
* Cancel any pending transition to idle frequency:
*/
- hrtimer_cancel(&df->idle_work.timer);
+ cancel_idle_work(df);
idle_time = ktime_to_ms(ktime_sub(ktime_get(), df->idle_time));
--
2.33.1
