[PATCH v15 5/6] drm/xe/pmu: Get/put runtime pm on event init

[Lucas De Marchi]

When the event is created, make sure runtime pm is taken and later put:
in order to read an event counter the GPU needs to remain accessible and
doing a get/put during perf's read is not possible it's holding a
raw_spinlock.

Suggested-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_pmu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pmu.c b/drivers/gpu/drm/xe/xe_pmu.c
index 5e5a9fcf30ace..2b66a7957b665 100644
--- a/drivers/gpu/drm/xe/xe_pmu.c
+++ b/drivers/gpu/drm/xe/xe_pmu.c
@@ -7,6 +7,7 @@
 #include <linux/device.h>
 
 #include "xe_device.h"
+#include "xe_pm.h"
 #include "xe_pmu.h"
 
 /**
@@ -71,6 +72,7 @@ static void xe_pmu_event_destroy(struct perf_event *event)
 	struct xe_device *xe = container_of(event->pmu, typeof(*xe), pmu.base);
 
 	drm_WARN_ON(&xe->drm, event->parent);
+	xe_pm_runtime_put(xe);
 	drm_dev_put(&xe->drm);
 }
 
@@ -103,6 +105,7 @@ static int xe_pmu_event_init(struct perf_event *event)
 
 	if (!event->parent) {
 		drm_dev_get(&xe->drm);
+		xe_pm_runtime_get(xe);
 		event->destroy = xe_pmu_event_destroy;
 	}
 
-- 
2.48.0