[RFC][PATCH v1 05/15] perf: export tracepoint events via sysfs:i915

[Lin Ming]

i915 tracepoint events are exported like below,

/sys/devices/pci0000:00/0000:00:02.0/drm/card0/events
|-- i915_gem_object_bind
|   |-- config
|   |-- type
|-- i915_gem_object_change_domain
|   |-- config
|   |-- type
....
....
---
 drivers/gpu/drm/i915/i915_drv.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 423dc90..185b502 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -28,6 +28,7 @@
  */
 
 #include <linux/device.h>
+#include <linux/perf_event.h>
 #include "drmP.h"
 #include "drm.h"
 #include "i915_drm.h"
@@ -413,7 +414,17 @@ int i965_reset(struct drm_device *dev, u8 flags)
 static int __devinit
 i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
-	return drm_get_dev(pdev, ent, &driver);
+	struct drm_device *drm_dev;
+	int ret;
+
+	ret = drm_get_dev(pdev, ent, &driver);
+
+	if (!ret) {
+		drm_dev = pci_get_drvdata(pdev);
+		perf_sys_add_tp(&drm_dev->primary->kdev.kobj, "i915");
+	}
+
+	return ret;
 }
 
 static void




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