drm: add vblank event trace point

Emit a trace point for vblank events.  This can be helpful for mapping
drawing activity against the vblank frequency and period.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jesse Barnes 2010-07-01 16:47:31 -07:00 committed by Dave Airlie
parent 97e0214044
commit ac2874b980
4 changed files with 48 additions and 1 deletions

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@ -11,7 +11,8 @@ drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
drm_agpsupport.o drm_scatter.o ati_pcigart.o drm_pci.o \
drm_sysfs.o drm_hashtab.o drm_sman.o drm_mm.o \
drm_crtc.o drm_modes.o drm_edid.o \
drm_info.o drm_debugfs.o drm_encoder_slave.o
drm_info.o drm_debugfs.o drm_encoder_slave.o \
drm_trace_points.o
drm-$(CONFIG_COMPAT) += drm_ioc32.o
@ -19,6 +20,8 @@ drm_kms_helper-y := drm_fb_helper.o drm_crtc_helper.o drm_dp_i2c_helper.o
obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
CFLAGS_drm_trace_points.o := -I$(src)
obj-$(CONFIG_DRM) += drm.o
obj-$(CONFIG_DRM_TTM) += ttm/
obj-$(CONFIG_DRM_TDFX) += tdfx/

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@ -34,6 +34,7 @@
*/
#include "drmP.h"
#include "drm_trace.h"
#include <linux/interrupt.h> /* For task queue support */
#include <linux/slab.h>
@ -754,6 +755,8 @@ void drm_handle_vblank_events(struct drm_device *dev, int crtc)
}
spin_unlock_irqrestore(&dev->event_lock, flags);
trace_drm_vblank_event(crtc, seq);
}
/**

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@ -0,0 +1,37 @@
#if !defined(_DRM_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
#define _DRM_TRACE_H_
#include <linux/stringify.h>
#include <linux/types.h>
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM drm
#define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
#define TRACE_INCLUDE_FILE drm_trace
TRACE_EVENT(drm_vblank_event,
TP_PROTO(int crtc, unsigned int seq),
TP_ARGS(crtc, seq),
TP_STRUCT__entry(
__field(int, crtc)
__field(unsigned int, seq)
),
TP_fast_assign(
__entry->crtc = crtc;
__entry->seq = seq;
),
TP_printk("crtc=%d, seq=%d", __entry->crtc, __entry->seq)
);
#endif /* _DRM_TRACE_H_ */
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#include <trace/define_trace.h>

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@ -0,0 +1,4 @@
#include "drmP.h"
#define CREATE_TRACE_POINTS
#include "drm_trace.h"