Messages in this thread Patch in this message | | | From | Ricardo Ribalda <> | Date | Wed, 04 Jan 2023 11:45:19 +0100 | Subject | [PATCH v3 1/8] media: uvcvideo: Extend documentation of uvc_video_clock_decode() |
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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> --- drivers/media/usb/uvc/uvc_video.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index d2eb9066e4dc..def079c7a6fd 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -516,7 +516,9 @@ 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) -- 2.39.0.314.g84b9a713c41-goog-b4-0.11.0-dev-696ae
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