Commit 2a3b7af1 authored by Michal Grzeschik's avatar Michal Grzeschik Committed by Greg Kroah-Hartman
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usb: gadget: uvc: mark incomplete frames with UVC_STREAM_ERR 



If an frame was transmitted incomplete to the host, we set the
UVC_STREAM_ERR bit in the header for the last request that is going
to be queued. This way the host will know that it should drop the
frame instead of trying to display the corrupted content.

Signed-off-by: default avatarMichael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20240214-uvc-error-tag-v1-2-37659a3877fe@pengutronix.de


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ab9ffa51

drivers/usb/gadget/function/uvc_video.c

+3 −0
Original line number Diff line number Diff line
@@ -35,6 +35,9 @@ uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf, 


	data[1] = UVC_STREAM_EOH | video->fid;



	if (video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE)

		data[1] |= UVC_STREAM_ERR;



	if (video->queue.buf_used == 0 && ts.tv_sec) {

		/* dwClockFrequency is 48 MHz */

		u32 pts = ((u64)ts.tv_sec * USEC_PER_SEC + ts.tv_nsec / NSEC_PER_USEC) * 48;