Merging upstream version 6.10.6.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 37 insertions, 35 deletions

diff --git a/drivers/media/usb/dvb-usb/dvb-usb-init.c b/drivers/media/usb/dvb-usb/dvb-usb-init.c
index 22d83ac18e..fbf58012be 100644
--- a/drivers/media/usb/dvb-usb/dvb-usb-init.c
+++ b/drivers/media/usb/dvb-usb/dvb-usb-init.c
@@ -23,40 +23,11 @@ static int dvb_usb_force_pid_filter_usage;
 module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
 MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
 
-static int dvb_usb_check_bulk_endpoint(struct dvb_usb_device *d, u8 endpoint)
-{
-	if (endpoint) {
-		int ret;
-
-		ret = usb_pipe_type_check(d->udev, usb_sndbulkpipe(d->udev, endpoint));
-		if (ret)
-			return ret;
-		ret = usb_pipe_type_check(d->udev, usb_rcvbulkpipe(d->udev, endpoint));
-		if (ret)
-			return ret;
-	}
-	return 0;
-}
-
-static void dvb_usb_clear_halt(struct dvb_usb_device *d, u8 endpoint)
-{
-	if (endpoint) {
-		usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, endpoint));
-		usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, endpoint));
-	}
-}
-
 static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
 {
 	struct dvb_usb_adapter *adap;
 	int ret, n, o;
 
-	ret = dvb_usb_check_bulk_endpoint(d, d->props.generic_bulk_ctrl_endpoint);
-	if (ret)
-		return ret;
-	ret = dvb_usb_check_bulk_endpoint(d, d->props.generic_bulk_ctrl_endpoint_response);
-	if (ret)
-		return ret;
 	for (n = 0; n < d->props.num_adapters; n++) {
 		adap = &d->adapter[n];
 		adap->dev = d;
@@ -132,8 +103,10 @@ static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
 	 * when reloading the driver w/o replugging the device
 	 * sometimes a timeout occurs, this helps
 	 */
-	dvb_usb_clear_halt(d, d->props.generic_bulk_ctrl_endpoint);
-	dvb_usb_clear_halt(d, d->props.generic_bulk_ctrl_endpoint_response);
+	if (d->props.generic_bulk_ctrl_endpoint != 0) {
+		usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+		usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+	}
 
 	return 0;
 
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 51f4f653b9..5bebe1460a 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -214,13 +214,13 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
 		 * Compute a bandwidth estimation by multiplying the frame
 		 * size by the number of video frames per second, divide the
 		 * result by the number of USB frames (or micro-frames for
-		 * high-speed devices) per second and add the UVC header size
-		 * (assumed to be 12 bytes long).
+		 * high- and super-speed devices) per second and add the UVC
+		 * header size (assumed to be 12 bytes long).
 		 */
 		bandwidth = frame->wWidth * frame->wHeight / 8 * format->bpp;
 		bandwidth *= 10000000 / interval + 1;
 		bandwidth /= 1000;
-		if (stream->dev->udev->speed == USB_SPEED_HIGH)
+		if (stream->dev->udev->speed >= USB_SPEED_HIGH)
 			bandwidth /= 8;
 		bandwidth += 12;
 
@@ -478,6 +478,7 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf,
 	ktime_t time;
 	u16 host_sof;
 	u16 dev_sof;
+	u32 dev_stc;
 
 	switch (data[1] & (UVC_STREAM_PTS | UVC_STREAM_SCR)) {
 	case UVC_STREAM_PTS | UVC_STREAM_SCR:
@@ -526,6 +527,34 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf,
 	if (dev_sof == stream->clock.last_sof)
 		return;
 
+	dev_stc = get_unaligned_le32(&data[header_size - 6]);
+
+	/*
+	 * STC (Source Time Clock) is the clock used by the camera. The UVC 1.5
+	 * standard states that it "must be captured when the first video data
+	 * of a video frame is put on the USB bus". This is generally understood
+	 * as requiring devices to clear the payload header's SCR bit before
+	 * the first packet containing video data.
+	 *
+	 * Most vendors follow that interpretation, but some (namely SunplusIT
+	 * on some devices) always set the `UVC_STREAM_SCR` bit, fill the SCR
+	 * field with 0's,and expect that the driver only processes the SCR if
+	 * there is data in the packet.
+	 *
+	 * Ignore all the hardware timestamp information if we haven't received
+	 * any data for this frame yet, the packet contains no data, and both
+	 * STC and SOF are zero. This heuristics should be safe on compliant
+	 * devices. This should be safe with compliant devices, as in the very
+	 * unlikely case where a UVC 1.1 device would send timing information
+	 * only before the first packet containing data, and both STC and SOF
+	 * happen to be zero for a particular frame, we would only miss one
+	 * clock sample from many and the clock recovery algorithm wouldn't
+	 * suffer from this condition.
+	 */
+	if (buf && buf->bytesused == 0 && len == header_size &&
+	    dev_stc == 0 && dev_sof == 0)
+		return;
+
 	stream->clock.last_sof = dev_sof;
 
 	host_sof = usb_get_current_frame_number(stream->dev->udev);
@@ -575,7 +604,7 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf,
 	spin_lock_irqsave(&stream->clock.lock, flags);
 
 	sample = &stream->clock.samples[stream->clock.head];
-	sample->dev_stc = get_unaligned_le32(&data[header_size - 6]);
+	sample->dev_stc = dev_stc;
 	sample->dev_sof = dev_sof;
 	sample->host_sof = host_sof;
 	sample->host_time = time;