[PATCH v5 0/5] Signalling last decoded frame by V4L2_BUF_FLAG_LAST and -EPIPE

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At the V4L2 codec API session during ELC-E 2014, we agreed that for the decoder
draining flow, after a V4L2_DEC_CMD_STOP decoder command was issued, the last
decoded buffer should get dequeued with a V4L2_BUF_FLAG_LAST set. After that,
poll should immediately return and all following VIDIOC_DQBUF should return
-EPIPE until the stream is stopped or decoding continued via V4L2_DEC_CMD_START.
(or STREAMOFF/STREAMON).

Changes since v4:
 - Split documentation changes back out into the first patch.
 - Changes according to Pawel's feedback, except for the POLLHUP suggestion.

regards
Philipp

Peter Seiderer (1):
  [media] videodev2: Add V4L2_BUF_FLAG_LAST

Philipp Zabel (4):
  [media] DocBook media: document mem2mem draining flow
  [media] videobuf2: return -EPIPE from DQBUF after the last buffer
  [media] coda: Set last buffer flag and fix EOS event
  [media] s5p-mfc: Set last buffer flag

 Documentation/DocBook/media/v4l/io.xml             | 10 ++++++++
 .../DocBook/media/v4l/vidioc-decoder-cmd.xml       |  9 +++++++-
 .../DocBook/media/v4l/vidioc-encoder-cmd.xml       |  8 ++++++-
 Documentation/DocBook/media/v4l/vidioc-qbuf.xml    |  8 +++++++
 drivers/media/platform/coda/coda-bit.c             |  4 ++--
 drivers/media/platform/coda/coda-common.c          | 27 +++++++++-------------
 drivers/media/platform/coda/coda.h                 |  3 +++
 drivers/media/platform/s5p-mfc/s5p_mfc.c           |  1 +
 drivers/media/v4l2-core/v4l2-mem2mem.c             | 10 +++++++-
 drivers/media/v4l2-core/videobuf2-core.c           | 19 ++++++++++++++-
 include/media/videobuf2-core.h                     | 13 +++++++++++
 include/trace/events/v4l2.h                        |  3 ++-
 include/uapi/linux/videodev2.h                     |  2 ++
 13 files changed, 94 insertions(+), 23 deletions(-)

-- 
2.1.4

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