linux-toradex.git/include/media/videobuf2-core.h, branch v3.8.2

[media] v4l: vb2: add buffer exporting via dmabuf

2012-11-25T19:21:00+00:00

This patch adds extension to videobuf2-core. It allow to export an mmap buffer
as a DMABUF file descriptor.

Signed-off-by: Tomasz Stanislawski 
Signed-off-by: Kyungmin Park 
Acked-by: Laurent Pinchart 
Acked-by: Hans Verkuil 
Tested-by: Mauro Carvalho Chehab 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l: vb2: add prepare/finish callbacks to allocators

2012-11-25T19:12:12+00:00

This patch adds support for prepare/finish callbacks in VB2 allocators. These
callback are used for buffer flushing.

Signed-off-by: Marek Szyprowski 
Acked-by: Laurent Pinchart 
Acked-by: Hans Verkuil 
Tested-by: Mauro Carvalho Chehab 
Signed-off-by: Mauro Carvalho Chehab

[media] v4l: vb2: add support for shared buffer (dma_buf)

2012-11-25T19:11:12+00:00

This patch adds support for DMABUF memory type in videobuf2. It calls relevant
APIs of dma_buf for v4l reqbuf / qbuf / dqbuf operations.
For this version, the support is for videobuf2 as a user of the shared buffer;
so the allocation of the buffer is done outside of V4L2. [A sample allocator of
dma-buf shared buffer is given at [1]]
[1]: Rob Clark's DRM:
   https://github.com/robclark/kernel-omap4/commits/drmplane-dmabuf
   [original work in the PoC for buffer sharing]

Signed-off-by: Tomasz Stanislawski 
Signed-off-by: Sumit Semwal 
Signed-off-by: Sumit Semwal 
Acked-by: Laurent Pinchart 
Acked-by: Hans Verkuil 
Tested-by: Mauro Carvalho Chehab 
Signed-off-by: Mauro Carvalho Chehab

[media] videobuf2-core: Replace BUG_ON and return an error at vb2_queue_init()

2012-09-27T09:09:10+00:00

This replaces BUG_ON() calls with WARN_ON(), and returns
EINVAL if some parameter is NULL, as suggested by Jonathan and Mauro.
The BUG_ON() call is too drastic to be used in this case.
See the full discussion here:
http://www.spinics.net/lists/linux-media/msg52462.html

Signed-off-by: Ezequiel Garcia 
Signed-off-by: Mauro Carvalho Chehab

[media] videobuf2-core: add helper functions

2012-07-06T20:32:06+00:00

Add helper functions to make it easier to adapt drivers to vb2.

These helpers take care of core locking and check if the filehandle is the
owner of the queue.

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

[media] v4l2-dev/ioctl.c: add vb2_queue support to video_device

2012-07-06T20:30:54+00:00

This prepares struct video_device for easier integration with vb2.

It also introduces a new lock that protects the vb2_queue. It is up
to the driver to use it or not. And the driver can associate an owner
filehandle with the queue to check whether queuing requests are
permitted for the calling filehandle.

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

[media] vb2: add vb2_get_unmapped_area in vb2 core

2011-11-03T20:29:13+00:00

no mmu system needs get_unmapped_area file operations to do mmap

Signed-off-by: Scott Jiang 
Signed-off-by: Marek Szyprowski 
Signed-off-by: Sylwester Nawrocki 
Signed-off-by: Mauro Carvalho Chehab

[media] V4L: vb2: add support for buffers of different sizes on a single queue

2011-11-03T20:28:29+00:00

The two recently added ioctl()s VIDIOC_CREATE_BUFS and VIDIOC_PREPARE_BUF
allow user-space applications to allocate video buffers of different
sizes and hand them over to the driver for fast switching between
different frame formats. This patch adds support for buffers of different
sizes on the same buffer-queue to vb2.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] V4L: vb2: prepare to support multi-size buffers

2011-11-03T20:28:28+00:00

In preparation for the forthcoming VIDIOC_CREATE_BUFS ioctl add a
"const struct v4l2_format *" argument to the .queue_setup() vb2
operation.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab

[media] V4L: add a new videobuf2 buffer state VB2_BUF_STATE_PREPARED

2011-11-03T20:28:23+00:00

This patch prepares for a better separation of the buffer preparation
stage.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Mauro Carvalho Chehab