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