From: Michael Grzeschik Date: Tue, 13 Feb 2024 23:37:55 +0000 (+0100) Subject: usb: gadget: uvc: mark incomplete frames with UVC_STREAM_ERR X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2a3b7af120477d0571b815ccb8600cafd5ebf02f;p=linux.git 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: Michael Grzeschik Link: https://lore.kernel.org/r/20240214-uvc-error-tag-v1-2-37659a3877fe@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index d677d7daa1878..d41f5f31dadd5 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;