[media] Feature removal: using capture and output capabilities for m2m devices

Identifying a memory-to-memory video device through an ORed output and
capture capability flags is not reliable. Schedule this for removal.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2012-07-26 09:30:50 -03:00 committed by Mauro Carvalho Chehab
parent f0476a83d6
commit a1367f1b26

View File

@ -576,3 +576,17 @@ Why: The regular V4L2 selections and the subdev selection API originally
any instabilities in the user space interface. After few cycles these
backward compatibility definitions will be removed.
Who: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
----------------------------
What: Using V4L2_CAP_VIDEO_CAPTURE and V4L2_CAP_VIDEO_OUTPUT flags
to indicate a V4L2 memory-to-memory device capability
When: 3.8
Why: New drivers should use new V4L2_CAP_VIDEO_M2M capability flag
to indicate a V4L2 video memory-to-memory (M2M) device and
applications can now identify a M2M video device by checking
for V4L2_CAP_VIDEO_M2M, with VIDIOC_QUERYCAP ioctl. Using ORed
V4L2_CAP_VIDEO_CAPTURE and V4L2_CAP_VIDEO_OUTPUT flags for M2M
devices is ambiguous and may lead, for example, to identifying
a M2M device as a video capture or output device.
Who: Sylwester Nawrocki <s.nawrocki@samsung.com>