diff options
| author |   Wade Farnsworth <wade_farnsworth@mentor.com> | 2013-11-22 16:48:28 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-12-10 15:53:43 -0200 |
| commit | 2d01237389dc64b37745ce87e64d6808b6eed582 (patch) | |
| tree | 389363779cc318263f2df0354f610c3cb9a06127 /drivers/media/v4l2-core/v4l2-dev.c | |
| parent | [media] dw2102: some missing unlocks on error (diff) | |
| download | linux-dev-2d01237389dc64b37745ce87e64d6808b6eed582.tar.xz linux-dev-2d01237389dc64b37745ce87e64d6808b6eed582.zip | |
[media] v4l2-dev: Add tracepoints for QBUF and DQBUF
Add tracepoints to the QBUF and DQBUF ioctls to enable rudimentary
performance measurements using standard kernel tracers.
[m.chehab@samsung.com: CodingStyle fixes (whitespacing)]
Signed-off-by: Wade Farnsworth <wade_farnsworth@mentor.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-dev.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dev.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index b5aaaac427ad..1cc17496b202 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -31,6 +31,10 @@ #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/v4l2.h> + #define VIDEO_NUM_DEVICES 256 #define VIDEO_NAME "video4linux" @@ -391,6 +395,11 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } else ret = -ENOTTY; + if (cmd == VIDIOC_DQBUF) + trace_v4l2_dqbuf(vdev->minor, (struct v4l2_buffer *)arg); + else if (cmd == VIDIOC_QBUF) + trace_v4l2_qbuf(vdev->minor, (struct v4l2_buffer *)arg); + return ret; } |