linux-toradex.git/drivers/media/usb/uvc, branch v3.16.3

[media] uvcvideo: Fix clock param realtime setting

2014-05-23T14:27:37+00:00

timestamps in v4l2 buffers returned to userspace are updated in
uvc_video_clock_update() which uses timestamps fetched from
uvc_video_clock_decode() by calling unconditionally ktime_get_ts().

Hence setting the module clock param to realtime has no effect before
this patch.

This has been tested with ffmpeg:

ffmpeg -y -f v4l2 -input_format yuyv422 -video_size 640x480 -framerate 30 -i /dev/video0 \
 -f alsa -acodec pcm_s16le -ar 16000 -ac 1 -i default \
 -c:v libx264 -preset ultrafast \
 -c:a libfdk_aac \
 out.mkv

and inspecting the v4l2 input starting timestamp.

Cc: Stable 
Signed-off-by: Olivier Langlois 
Signed-off-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] uvcvideo: Fix marking buffer erroneous in case of FID toggling

2014-05-23T14:25:02+00:00

Set error bit for incomplete buffers when end of buffer is detected by
FID toggling (for example when last transaction with EOF is lost).
This prevents passing incomplete buffers to the userspace.

Signed-off-by: Anton Leontiev 
Signed-off-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] vb2: call buf_finish from __queue_cancel

2014-03-11T09:56:39+00:00

If a queue was canceled, then the buf_finish op was never called for the
pending buffers. So add this call to queue_cancel. Before calling buf_finish
set the buffer state to PREPARED, which is the correct state. That way the
states DONE and ERROR will only be seen in buf_finish if streaming is in
progress.

Since buf_finish can now be called from non-streaming state we need to
adapt the handful of drivers that actually need to know this.

Signed-off-by: Hans Verkuil 
Acked-by: Sakari Ailus 
Signed-off-by: Mauro Carvalho Chehab

[media] vb2: change result code of buf_finish to void

2014-03-11T09:56:38+00:00

The buf_finish op should always work, so change the return type to void.
Update the few drivers that use it.

Signed-off-by: Hans Verkuil 
Acked-by: Pawel Osciak 
Reviewed-by: Pawel Osciak 
Signed-off-by: Mauro Carvalho Chehab

[media] uvcvideo: Add bayer 8-bit patterns to uvcvideo

2014-03-05T19:58:21+00:00

Add bayer 8-bit GUIDs to uvcvideo and associated them with the
corresponding V4L2 pixel formats.

Signed-off-by: Edgar Thier 
Signed-off-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] uvcvideo: Do not use usb_set_interface on bulk EP

2014-03-05T19:57:46+00:00

The UVC specification uses alternate setting selection to notify devices
of stream start/stop. This breaks when using bulk-based devices, as the
video streaming interface has a single alternate setting in that case,
making video stream start and video stream stop events to appear
identical to the device. Bulk-based devices are thus not well supported
by UVC.

The webcam built in the Asus Zenbook UX302LA ignores the set interface
request and will keep the video stream enabled when the driver tries to
stop it. If USB autosuspend is enabled the device will then be suspended
and will crash, requiring a cold reboot.

USB trace capture showed that Windows sends a CLEAR_FEATURE(HALT)
request to the bulk endpoint when stopping the stream instead of
selecting alternate setting 0. The camera then behaves correctly, and
thus seems to require that behaviour.

Replace selection of alternate setting 0 with clearing of the endpoint
halt feature at video stream stop for bulk-based devices. Let's refrain
from blaming Microsoft this time, as it's not clear whether this
Windows-specific but USB-compliant behaviour was specifically developed
to handle bulkd-based UVC devices, or if the camera just took advantage
of it.

CC: stable@vger.kernel.org
Signed-off-by: Oleksij Rempel 
Signed-off-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] uvcvideo: Tell the user space we're using start-of-exposure timestamps

2014-03-05T19:34:50+00:00

The UVC device provided timestamps are taken from the clock once the
exposure of the frame has begun, not when the reception of the frame would
have been finished as almost anywhere else. Show this to the user space by
using V4L2_BUF_FLAG_TSTAMP_SRC_SOE buffer flag.

Signed-off-by: Sakari Ailus 
Acked-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l: Rename vb2_queue.timestamp_type as timestamp_flags

2014-03-05T19:34:14+00:00

The timestamp_type field used to contain only the timestamp type. Soon it
will be used for timestamp source flags as well. Rename the field
accordingly.

[m.chehab@samsung.com: do the change also to drivers/staging/media and at s2255]
Signed-off-by: Sakari Ailus 
Acked-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

[media] uvcvideo: Enable VIDIOC_CREATE_BUFS

2014-02-28T16:24:32+00:00

This patch enables the ioctl to create additional buffers on the
videobuf2 capture queue.

[laurent.pinchart@ideasonboard.com: Acquire privileges instead of just
checking them in VIDIOC_CREATE_BUFS implementation]

Signed-off-by: Philipp Zabel 
Signed-off-by: Laurent Pinchart 
Tested-by: Philipp Zabel 
Signed-off-by: Mauro Carvalho Chehab

[media] uvcvideo: Support allocating buffers larger than the current frame size

2014-02-28T16:24:00+00:00

The queue_setup handler takes an optional format argument that can be
used to allocate buffers for a format different than the current format.
The uvcvideo driver doesn't support changing the format when buffers
have been allocated, but there's no reason not to support allocating
buffers larger than the minimum size.

When the format argument isn't NULL verify that the requested image size
is large enough for the current format and use it for the buffer size.

Signed-off-by: Laurent Pinchart 
Tested-by: Philipp Zabel 
Signed-off-by: Mauro Carvalho Chehab