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[media] videobuf2: add trace events

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Add videobuf2 specific vb2_qbuf and vb2_dqbuf trace events that mirror the
v4l2_qbuf and v4l2_dqbuf trace events, only they include additional
information about queue fill state and are emitted right before the buffer
is enqueued in the driver or userspace is woken up. This allows to make
sense of the timeline of trace events in combination with others that might
be triggered by __enqueue_in_driver.

Also two new trace events vb2_buf_queue and vb2_buf_done are added,
allowing to trace the handover between videobuf2 framework and driver.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Philipp Zabel
2015-07-10 10:49:26 -03:00
committed by Mauro Carvalho Chehab
parent c13a5ccf5d
commit 2091f5181c
2 changed files with 108 additions and 0 deletions
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97
include/trace/events/v4l2.h
View File

@@ -174,6 +174,103 @@ DEFINE_EVENT(v4l2_event_class, v4l2_qbuf,
TP_ARGS(minor, buf)
);
DECLARE_EVENT_CLASS(vb2_event_class,
TP_PROTO(struct vb2_queue *q, struct vb2_buffer *vb),
TP_ARGS(q, vb),
TP_STRUCT__entry(
__field(int, minor)
__field(u32, queued_count)
__field(int, owned_by_drv_count)
__field(u32, index)
__field(u32, type)
__field(u32, bytesused)
__field(u32, flags)
__field(u32, field)
__field(s64, timestamp)
__field(u32, timecode_type)
__field(u32, timecode_flags)
__field(u8, timecode_frames)
__field(u8, timecode_seconds)
__field(u8, timecode_minutes)
__field(u8, timecode_hours)
__field(u8, timecode_userbits0)
__field(u8, timecode_userbits1)
__field(u8, timecode_userbits2)
__field(u8, timecode_userbits3)
__field(u32, sequence)
),
TP_fast_assign(
__entry->minor = q->owner ? q->owner->vdev->minor : -1;
__entry->queued_count = q->queued_count;
__entry->owned_by_drv_count =
atomic_read(&q->owned_by_drv_count);
__entry->index = vb->v4l2_buf.index;
__entry->type = vb->v4l2_buf.type;
__entry->bytesused = vb->v4l2_planes[0].bytesused;
__entry->flags = vb->v4l2_buf.flags;
__entry->field = vb->v4l2_buf.field;
__entry->timestamp = timeval_to_ns(&vb->v4l2_buf.timestamp);
__entry->timecode_type = vb->v4l2_buf.timecode.type;
__entry->timecode_flags = vb->v4l2_buf.timecode.flags;
__entry->timecode_frames = vb->v4l2_buf.timecode.frames;
__entry->timecode_seconds = vb->v4l2_buf.timecode.seconds;
__entry->timecode_minutes = vb->v4l2_buf.timecode.minutes;
__entry->timecode_hours = vb->v4l2_buf.timecode.hours;
__entry->timecode_userbits0 = vb->v4l2_buf.timecode.userbits[0];
__entry->timecode_userbits1 = vb->v4l2_buf.timecode.userbits[1];
__entry->timecode_userbits2 = vb->v4l2_buf.timecode.userbits[2];
__entry->timecode_userbits3 = vb->v4l2_buf.timecode.userbits[3];
__entry->sequence = vb->v4l2_buf.sequence;
),
TP_printk("minor = %d, queued = %u, owned_by_drv = %d, index = %u, "
"type = %s, bytesused = %u, flags = %s, field = %s, "
"timestamp = %llu, timecode = { type = %s, flags = %s, "
"frames = %u, seconds = %u, minutes = %u, hours = %u, "
"userbits = { %u %u %u %u } }, sequence = %u", __entry->minor,
__entry->queued_count,
__entry->owned_by_drv_count,
__entry->index, show_type(__entry->type),
__entry->bytesused,
show_flags(__entry->flags),
show_field(__entry->field),
__entry->timestamp,
show_timecode_type(__entry->timecode_type),
show_timecode_flags(__entry->timecode_flags),
__entry->timecode_frames,
__entry->timecode_seconds,
__entry->timecode_minutes,
__entry->timecode_hours,
__entry->timecode_userbits0,
__entry->timecode_userbits1,
__entry->timecode_userbits2,
__entry->timecode_userbits3,
__entry->sequence
)
)
DEFINE_EVENT(vb2_event_class, vb2_buf_done,
TP_PROTO(struct vb2_queue *q, struct vb2_buffer *vb),
TP_ARGS(q, vb)
);
DEFINE_EVENT(vb2_event_class, vb2_buf_queue,
TP_PROTO(struct vb2_queue *q, struct vb2_buffer *vb),
TP_ARGS(q, vb)
);
DEFINE_EVENT(vb2_event_class, vb2_dqbuf,
TP_PROTO(struct vb2_queue *q, struct vb2_buffer *vb),
TP_ARGS(q, vb)
);
DEFINE_EVENT(vb2_event_class, vb2_qbuf,
TP_PROTO(struct vb2_queue *q, struct vb2_buffer *vb),
TP_ARGS(q, vb)
);
#endif /* if !defined(_TRACE_V4L2_H) || defined(TRACE_HEADER_MULTI_READ) */
/* This part must be outside protection */