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authorSylwester Nawrocki <s.nawrocki@samsung.com>2012-07-26 16:30:50 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-07-31 02:32:50 +0400
commita1367f1b260d29e9b9fb20d8e2f39f1e74fa6c3b (patch)
tree2320caadb225499850ebb02aafeaef4f86c168ca /Documentation
parentf0476a83d61a8004eb535a0b65721ca405421fe8 (diff)
downloadlinux-a1367f1b260d29e9b9fb20d8e2f39f1e74fa6c3b.tar.xz
[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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/feature-removal-schedule.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index b99803066b7b..dbefb17b821d 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -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>