On Kernel 2.6.39, the omap3 driver was introduced together with a new way to control complex V4L2 devices used on embedded systems, but this was never documented, as the original idea were to have "soon" support for standard apps to use it as well, via libv4l, but that didn't happen so far. Also, it is not possible for an userspace applicatin to detect the kind of control a device supports. This series fill the gap, by documenting the new type of hardware control and adding a way for userspace to detect if the device can be used or not by an standard V4L2 application. Notes: ==== 1) For the sake of better review, this series start with the addition of a glossary, as requested by Laurent. Please notice, however, that the glossary there references some new captions that will only be added by subsequent patches. So, when this series get applied, the glossary patch should actually be merged after the patches that introduce those new captions, in order to avoid warnings for non-existing references. 2) This series doesn't contain patches that actually use the new flag. This will be added after such patch gets reviewed. v4: - Addressed Hans comments for v2; - Fixed broken references at the glossary.rst v3: - Add a glossary to be used by the new documentation about hardware control; - Add a patch removing minor number range - Use glossary terms at open.rst - Split the notice about subdev-API on vdev-centric, as this change will require further discussions. v2: - added a patch at the beginning of the series better defining the device node naming rules; - better defined the differenes between device hardware and V4L2 device node as suggested by Laurent and with changes proposed by Hans and Sakari - changed the caps flag to indicate MC-centric devices - removed the final patch that would use the new caps flag. I'll write it once we agree on the new caps flag. Mauro Carvalho Chehab (7): media: add glossary.rst with a glossary of terms used at V4L2 spec media: open.rst: better document device node naming media: open.rst: remove the minor number range media: open.rst: document devnode-centric and mc-centric types media: open.rst: Adjust some terms to match the glossary media: videodev2: add a flag for MC-centric devices media: open.rst: add a notice about subdev-API on vdev-centric Documentation/media/uapi/v4l/glossary.rst | 98 ++++++++++++++++++ Documentation/media/uapi/v4l/open.rst | 123 ++++++++++++++++++++--- Documentation/media/uapi/v4l/v4l2.rst | 1 + Documentation/media/uapi/v4l/vidioc-querycap.rst | 5 + Documentation/media/videodev2.h.rst.exceptions | 1 + include/uapi/linux/videodev2.h | 2 + 6 files changed, 216 insertions(+), 14 deletions(-) create mode 100644 Documentation/media/uapi/v4l/glossary.rst -- 2.13.3
