From 2d01237389dc64b37745ce87e64d6808b6eed582 Mon Sep 17 00:00:00 2001
From: Wade Farnsworth <wade_farnsworth@mentor.com>
Date: Fri, 22 Nov 2013 16:48:28 -0300
Subject: [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>
---
 drivers/media/v4l2-core/v4l2-dev.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'drivers/media/v4l2-core/v4l2-dev.c')

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;
 }
 
-- 
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