[13/14] drm/i915: Async check for streams data availability with hrtimer rescheduling

Commit Message

[e-mail] Sept. 7, 2017, 10:06 a.m. UTC

From: Sourab Gupta <[e-mail]>

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

Signed-off-by: Sourab Gupta <[e-mail]>
Signed-off-by: Sagar Arun Kamble <[e-mail]>
---
 drivers/gpu/drm/i915/i915_perf.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 3a72705..630af3e 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -3465,12 +3465,10 @@  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;
@@ -3486,6 +3484,15 @@  static enum hrtimer_restart poll_check_timer_cb(struct hrtimer *hrtimer)
 		}
 		srcu_read_unlock(&engine->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));