On 8/4/20 4:29 PM, Helen Koike wrote: > Hello, > > This is v5 of the Extended API for formats and buffers, which introduces > the following new ioctls: > > int ioctl(int fd, VIDIOC_G_EXT_PIX_FMT, struct v4l2_ext_pix_format *argp) > int ioctl(int fd, VIDIOC_S_EXT_PIX_FMT, struct v4l2_ext_pix_format *argp) > int ioctl(int fd, VIDIOC_TRY_EXT_PIX_FMT, struct v4l2_ext_pix_format *argp) > > int ioctl(int fd, VIDIOC_EXT_CREATE_BUFS, struct v4l2_ext_create_buffers *argp) > int ioctl(int fd, VIDIOC_EXT_QUERYBUF, struct v4l2_ext_buffer *argp) > int ioctl(int fd, VIDIOC_EXT_QBUF, struct v4l2_ext_buffer *argp) > int ioctl(int fd, VIDIOC_EXT_DQBUF, struct v4l2_ext_buffer *argp) > int ioctl(int fd, VIDIOC_EXT_PREPARE_BUF, struct v4l2_ext_buffer *argp) > > Please check v4 cover letter specific topic past discussions > https://patchwork.linuxtv.org/project/linux-media/cover/20200717115435.2632623-1-helen.koike@xxxxxxxxxxxxx/ > > Documentation > ============= > I added a first version of the documentation. > I would appreciate some tips in how to organize this better, since there are > several parts of the docs which reference the "old" API, and for now > I just added a note pointing to the Extended API. > > Instead of duplicating documentation from the code to the Docs (as used by > most part of v4l2 documentation), I just added a reference to let Sphinx get > the structs documentation from the code, so we can avoid duplicating. > > For reviewing convenience, I uploaded the generated html docs at > https://people.collabora.com/~koike/ext-doc-v5/userspace-api/media/v4l/ext-api.html > > There is room for improvements, it would be great to get your suggestions. > > uAPI > ==== > This version have some minor changes in the uAPI structs, highlight to the > mem_offset that was returned to struct v4l2_ext_plane, memory field that now > is per plane, and some adjustments in field sizes and re-ordering to make > structs the same for 32 and 64 bits (which I verified with pahole tool). > > I also updated v4l2-compliance: > https://gitlab.collabora.com/koike/v4l-utils/-/tree/ext-api/wip > > We need to decide the size of the reserved fields left, how much reserved > fields do you think we should leave for each struct? > > What is next > ============ > I would like to improve implementation (for the kernel and v4l2-compliane) and > drop the RFC tag for next version, so please review the uAPI. Ops, sorry, I forgot to add RFC tag when submitting. Please consider RFC for this one. Regards, Helen > > > List of changes in v5: > ====================== > * first version of Documentation > * migrate memory from v4l2_ext_buffer to v4l2_ext_plane > * return mem_offset to struct v4l2_ext_plane > * change sizes and reorder fields to avoid holes in the struct and make it > the same for 32 and 64 bits > * removed __attribute__ ((packed)) from uapi structs > * set request_fd to signed > * add documentation > * updated some commit messages > > Hans Verkuil (1): > media: v4l2: Add extended buffer operations > > Helen Koike (6): > media: v4l2: Extend pixel formats to unify single/multi-planar > handling (and more) > media: videobuf2: Expose helpers to implement the _ext_fmt and > _ext_buf hooks > media: mediabus: Add helpers to convert a ext_pix format to/from a > mbus_fmt > media: vivid: Convert the capture and output drivers to > EXT_FMT/EXT_BUF > media: vimc: Implement the ext_fmt and ext_buf hooks > media: docs: add documentation for the Extended API > > .../userspace-api/media/v4l/buffer.rst | 5 + > .../userspace-api/media/v4l/common.rst | 1 + > .../userspace-api/media/v4l/dev-capture.rst | 5 + > .../userspace-api/media/v4l/dev-output.rst | 5 + > .../userspace-api/media/v4l/ext-api.rst | 107 ++ > .../userspace-api/media/v4l/format.rst | 16 +- > .../userspace-api/media/v4l/user-func.rst | 5 + > .../media/v4l/vidioc-ext-create-bufs.rst | 95 ++ > .../media/v4l/vidioc-ext-prepare-buf.rst | 62 ++ > .../media/v4l/vidioc-ext-qbuf.rst | 204 ++++ > .../media/v4l/vidioc-ext-querybuf.rst | 79 ++ > .../media/v4l/vidioc-g-ext-pix-fmt.rst | 117 +++ > .../media/common/videobuf2/videobuf2-core.c | 2 + > .../media/common/videobuf2/videobuf2-v4l2.c | 560 ++++++----- > .../media/test-drivers/vimc/vimc-capture.c | 61 +- > drivers/media/test-drivers/vimc/vimc-common.c | 6 +- > drivers/media/test-drivers/vimc/vimc-common.h | 2 +- > drivers/media/test-drivers/vivid/vivid-core.c | 70 +- > .../test-drivers/vivid/vivid-touch-cap.c | 26 +- > .../test-drivers/vivid/vivid-touch-cap.h | 3 +- > .../media/test-drivers/vivid/vivid-vid-cap.c | 169 +--- > .../media/test-drivers/vivid/vivid-vid-cap.h | 15 +- > .../media/test-drivers/vivid/vivid-vid-out.c | 193 ++-- > .../media/test-drivers/vivid/vivid-vid-out.h | 15 +- > drivers/media/v4l2-core/v4l2-dev.c | 50 +- > drivers/media/v4l2-core/v4l2-ioctl.c | 938 ++++++++++++++++-- > include/media/v4l2-ioctl.h | 60 ++ > include/media/v4l2-mediabus.h | 42 + > include/media/videobuf2-core.h | 6 +- > include/media/videobuf2-v4l2.h | 21 +- > include/uapi/linux/videodev2.h | 146 +++ > 31 files changed, 2363 insertions(+), 723 deletions(-) > create mode 100644 Documentation/userspace-api/media/v4l/ext-api.rst > create mode 100644 Documentation/userspace-api/media/v4l/vidioc-ext-create-bufs.rst > create mode 100644 Documentation/userspace-api/media/v4l/vidioc-ext-prepare-buf.rst > create mode 100644 Documentation/userspace-api/media/v4l/vidioc-ext-qbuf.rst > create mode 100644 Documentation/userspace-api/media/v4l/vidioc-ext-querybuf.rst > create mode 100644 Documentation/userspace-api/media/v4l/vidioc-g-ext-pix-fmt.rst >
