diff options
| author | Ricardo Ribalda <ribalda@chromium.org> | 2023-01-04 13:45:19 +0300 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-01-16 00:45:13 +0300 |
| commit | 70fcaf92a39e6cb7542de0fc0ad4562f42f7f54a (patch) | |
| tree | 1733e752d1e4f007eef09d8b0c27fa60c80442ba /drivers/media/usb | |
| parent | 5dd0eab84ae9a4b292baf1ad02e1a273c475cd04 (diff) | |
| download | linux-70fcaf92a39e6cb7542de0fc0ad4562f42f7f54a.tar.xz | |
media: uvcvideo: Extend documentation of uvc_video_clock_decode()
Make an explicit reference to UVC 1.5, explaining how the algorithm
supports the different behaviour of UVC 1.1 and 1.5.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: HungNien Chen <hn.chen@sunplusit.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_video.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index e4b71df08216..b1f7416858b7 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -518,7 +518,9 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, /* * To limit the amount of data, drop SCRs with an SOF identical to the - * previous one. + * previous one. This filtering is also needed to support UVC 1.5, where + * all the data packets of the same frame contains the same SOF. In that + * case only the first one will match the host_sof. */ dev_sof = get_unaligned_le16(&data[header_size - 2]); if (dev_sof == stream->clock.last_sof) |