[PATCH 11/14] drm/i915: Async check for streams data availability with hrtimer rescheduling

[Sagar Arun Kamble]

From: Sourab Gupta <sourab.gupta at intel.com>

This patch ensures hrtimer is rescheduled immediately during cb by
doing async call to check for streams data availability.

Signed-off-by: Sourab Gupta <sourab.gupta at intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
---
 drivers/gpu/drm/i915/i915_perf.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 99e01a6..e4e232b 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -3311,12 +3311,10 @@ static ssize_t i915_perf_read(struct file *file,
 	return ret;
 }
 
-static enum hrtimer_restart poll_check_timer_cb(struct hrtimer *hrtimer)
+static void wake_up_perf_streams(void *data, async_cookie_t cookie)
 {
+	struct drm_i915_private *dev_priv = data;
 	struct i915_perf_stream *stream;
-	struct drm_i915_private *dev_priv =
-		container_of(hrtimer, typeof(*dev_priv),
-			     perf.poll_check_timer);
 	int idx;
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
@@ -3332,6 +3330,15 @@ static enum hrtimer_restart poll_check_timer_cb(struct hrtimer *hrtimer)
 		}
 		srcu_read_unlock(&engine->perf_srcu, idx);
 	}
+}
+
+static enum hrtimer_restart poll_check_timer_cb(struct hrtimer *hrtimer)
+{
+	struct drm_i915_private *dev_priv =
+		container_of(hrtimer, typeof(*dev_priv),
+			     perf.poll_check_timer);
+
+	async_schedule(wake_up_perf_streams, dev_priv);
 
 	hrtimer_forward_now(hrtimer, ns_to_ktime(POLL_PERIOD));
 
-- 
1.9.1