linux-stable.git/include/uapi/linux/videodev2.h, branch v5.6.2

media: v4l2-core: fix v4l2_buffer handling for time64 ABI

2020-01-03T14:50:21+00:00

The v4l2_buffer structure contains a 'struct timeval' member that is
defined by the user space C library, creating an ABI incompatibility
when that gets updated to a 64-bit time_t.

As in v4l2_event, handle this with a special case in video_put_user()
and video_get_user() to replace the memcpy there.

Since the structure also contains a pointer, there are now two
native versions (on 32-bit systems) as well as two compat versions
(on 64-bit systems), which unfortunately complicates the compat
handler quite a bit.

Duplicating the existing handlers for the new types is a safe
conversion for now, but unfortunately this may turn into a
maintenance burden later. A larger-scale rework of the
compat code might be a better alternative, but is out of scope
of the y2038 work.

Sparc64 needs a special case because of their special suseconds_t
definition.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l2-core: fix VIDIOC_DQEVENT for time64 ABI

2020-01-03T14:47:57+00:00

The v4l2_event structure contains a 'struct timespec' member that is
defined by the user space C library, creating an ABI incompatibility
when that gets updated to a 64-bit time_t.

While passing a 32-bit time_t here would be sufficient for CLOCK_MONOTONIC
timestamps, simply redefining the structure to use the kernel's
__kernel_old_timespec would not work for any library that uses a copy
of the linux/videodev2.h header file rather than including the copy from
the latest kernel headers.

This means the kernel has to be changed to handle both versions of the
structure layout on a 32-bit architecture. The easiest way to do this
is during the copy from/to user space.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l2: abstract timeval handling in v4l2_buffer

2020-01-03T14:43:35+00:00

As a preparation for adding 64-bit time_t support in the uapi,
change the drivers to no longer care about the format of the
timestamp field in struct v4l2_buffer.

The v4l2_timeval_to_ns() function is no longer needed in the
kernel after this, but there is userspace code relying on
it to be part of the uapi header.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Hans Verkuil 
[hverkuil-cisco@xs4all.nl: replace spaces by tabs]
Signed-off-by: Mauro Carvalho Chehab

media: v4l2_core: Add p_area to struct v4l2_ext_control

2019-11-08T06:42:25+00:00

Allow accessing V4L2_CTRL_TYPE_AREA controls without any casting.

Signed-off-by: Ricardo Ribalda Delgado 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l2-core: Add new metadata format

2019-10-24T14:45:20+00:00

Add new metadata format to support metadata output in vivid.

Signed-off-by: Vandana BN 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: videodev2.h: add V4L2_DEC_CMD_FLUSH

2019-10-21T10:39:50+00:00

Add this new V4L2_DEC_CMD_FLUSH decoder command and document it.

Reviewed-by: Boris Brezillon 
Reviewed-by: Alexandre Courbot 
Signed-off-by: Hans Verkuil 
Signed-off-by: Jernej Skrabec 
Signed-off-by: Mauro Carvalho Chehab

media: vb2: add V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF

2019-10-21T10:37:57+00:00

This patch adds support for the V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF
flag.

It also adds a new V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF
capability.

Drivers should set vb2_queue->subsystem_flags to
VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF to indicate support
for this flag.

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: add V4L2_CTRL_TYPE_AREA control type

2019-10-10T14:36:32+00:00

This type contains the width and the height of a rectangular area.

Reviewed-by: Jacopo Mondi 
Signed-off-by: Ricardo Ribalda Delgado 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: videodev2.h: add V4L2_FMT_FLAG_DYN_RESOLUTION

2019-08-19T17:56:31+00:00

Add an enum_fmt format flag to specifically tag coded formats where
dynamic resolution switching is supported by the device.

This is useful for some codec drivers that can support dynamic
resolution switching for one or more of their listed coded formats. It
allows userspace to know whether it should extract the video parameters
itself, or if it can rely on the device to send V4L2_EVENT_SOURCE_CHANGE
when such changes are detected.

Signed-off-by: Maxime Jourdan 
Reviewed-by: Paul Kocialkowski 
Reviewed-by: Alexandre Courbot 
Acked-by: Tomasz Figa 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: videodev2.h: add V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM

2019-08-19T17:41:45+00:00

Add an enum_fmt format flag to specifically tag coded formats where
full bytestream parsing is supported by the device.

Some stateful decoders are capable of fully parsing a bytestream,
but others require that userspace pre-parses the bytestream into
frames or fields (see the corresponding pixelformat descriptions
for details).

If this flag is set, then this pre-parsing step is not required
(but still possible, of course).

Signed-off-by: Hans Verkuil 
Reviewed-by: Paul Kocialkowski 
Reviewed-by: Alexandre Courbot 
Signed-off-by: Mauro Carvalho Chehab