| Message ID | 20240214-uvc-error-tag-v1-2-37659a3877fe@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 2a3b7af120477d0571b815ccb8600cafd5ebf02f |
| Headers | show |
| Series | usb: gadget: uvc: improve tagging transmit errors | expand |
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index c288aceee92ac..af99958e6abf8 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -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;
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: Michael Grzeschik <m.grzeschik@pengutronix.de> --- drivers/usb/gadget/function/uvc_video.c | 3 +++ 1 file changed, 3 insertions(+)