v4l2_get_timestamp() produces a monotonic timestamp but unlike
ktime_get_ts(), it uses struct timeval instead of struct timespec, saving
the drivers the conversion job when getting timestamps for v4l2_buffer's
timestamp field.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
---
drivers/media/v4l2-core/v4l2-common.c | 10 ++++++++++
include/media/v4l2-common.h | 2 ++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 380ddd8..614316f 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -978,3 +978,13 @@ const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
return best;
}
EXPORT_SYMBOL_GPL(v4l2_find_nearest_format);
+
+void v4l2_get_timestamp(struct timeval *tv)
+{
+ struct timespec ts;
+
+ ktime_get_ts(&ts);
+ tv->tv_sec = ts.tv_sec;
+ tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+}
+EXPORT_SYMBOL_GPL(v4l2_get_timestamp);
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 1a0b2db..ec7c9c0 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -225,4 +225,6 @@ bool v4l2_detect_gtf(unsigned frame_height, unsigned hfreq, unsigned vsync,
struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait);
+void v4l2_get_timestamp(struct timeval *tv);
+
#endif /* V4L2_COMMON_H_ */
--
1.7.2.5
--
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