linux-kernel - [PATCH v7 0/6] V4L2 Explicit Synchronization

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Date:   Wed, 10 Jan 2018 14:07:26 -0200
From:   Gustavo Padovan <gustavo@...ovan.org>
To:     linux-media@...r.kernel.org
Cc:     Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@....samsung.com>,
        Shuah Khan <shuahkh@....samsung.com>,
        Pawel Osciak <pawel@...iak.com>,
        Alexandre Courbot <acourbot@...omium.org>,
        Sakari Ailus <sakari.ailus@....fi>,
        Brian Starkey <brian.starkey@....com>,
        Thierry Escande <thierry.escande@...labora.com>,
        linux-kernel@...r.kernel.org,
        Gustavo Padovan <gustavo.padovan@...labora.com>
Subject: [PATCH v7 0/6] V4L2 Explicit Synchronization

From: Gustavo Padovan <gustavo.padovan@...labora.com>

Hi,

v7 bring a fix for a crash when not using fences and a uAPI fix.
I've done a bit more of testing on it and also measured some
performance. On a intel laptop a DRM<->V4L2 pipeline with fences is
runnning twice as faster than the same pipeline with no fences.

For more details on how fences work refer to patch 6 in this series.

The test tools I've been using are:
https://gitlab.collabora.com/padovan/drm-v4l2-test
https://gitlab.collabora.com/padovan/v4l2-fences-test

Please review,

Gustavo

Gustavo Padovan (6):
  [media] vb2: add is_unordered callback for drivers
  [media] v4l: add 'unordered' flag to format description ioctl
  [media] vb2: add explicit fence user API
  [media] vb2: add in-fence support to QBUF
  [media] vb2: add out-fence support to QBUF
  [media] v4l: Document explicit synchronization behavior

 Documentation/media/uapi/v4l/buffer.rst          |  15 ++
 Documentation/media/uapi/v4l/vidioc-enum-fmt.rst |   3 +
 Documentation/media/uapi/v4l/vidioc-qbuf.rst     |  47 ++++-
 Documentation/media/uapi/v4l/vidioc-querybuf.rst |   9 +-
 drivers/media/common/videobuf/videobuf2-core.c   | 253 +++++++++++++++++++++--
 drivers/media/common/videobuf/videobuf2-v4l2.c   |  51 ++++-
 drivers/media/v4l2-core/Kconfig                  |  33 +++
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c    |   4 +-
 include/media/videobuf2-core.h                   |  41 +++-
 include/uapi/linux/videodev2.h                   |   8 +-
 10 files changed, 437 insertions(+), 27 deletions(-)

-- 
2.14.3