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media: uvcvideo: Only do uvc_video_get_time() if needed

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There is no need to calculate the current time if the sample is going to
be filtered.

Move the assignment close to uvc_video_clock_add_sample().

Suggested-by: Hans de Goede <hansg@kernel.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Tested-by: Yunke Cao <yunkec@google.com>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Link: https://patch.msgid.link/20260513-uvc-hwtimestamp-v3-6-7a64838b0b02@chromium.org
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Ricardo Ribalda 2026-05-13 11:49:25 +00:00 committed by Hans Verkuil
parent 0491c93a51
commit a3d78e74dd
1 changed files with 3 additions and 2 deletions
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5
drivers/media/usb/uvc/uvc_video.c
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@ -645,8 +645,6 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf,
if (stream->dev->quirks & UVC_QUIRK_INVALID_DEVICE_SOF)
sample.dev_sof = sample.host_sof;
sample.host_time = uvc_video_get_time();
/*
* The UVC specification allows device implementations that can't obtain
* the USB frame number to keep their own frame counters as long as they
@ -687,6 +685,9 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf,
(UVC_MIN_HW_TIMESTAMP_DIFF / stream->clock.size))
return;
/* This is expensive, only do it if the sample will be added. */
sample.host_time = uvc_video_get_time();
uvc_video_clock_add_sample(&stream->clock, &sample);
stream->clock.last_sof_processed = sample.dev_sof;
}