[v9,00/11] media: Implement UVC v1.5 ROI

Message

Yunke Cao Oct. 25, 2022, 5:55 a.m. UTC

Hi,

This patch set implements UVC v1.5 region of interest using V4L2
control API.

ROI control is consisted two uvc specific controls.
1. A rectangle control with a newly added type V4L2_CTRL_TYPE_RECT.
2. An auto control with type bitmask.

V4L2_CTRL_WHICH_MIN/MAX_VAL is added to support the rectangle control.

Tested on two different usb cameras using v4l2-compliance, v4l2-ctl
and calling ioctls.

1/11 adds V4L2_CTRL_TYPE_RECT.
2/11, 3/11, 4/11 refactors uvc_ctrl.c.
5/11 adds support for compound controls.
6/11 implements ROI in UVC.
7/11 initializes ROI control to default value.
8/11 is a cherry-pick for Hans' implementation of
V4L2_CTRL_WHICH_MIN/MAX_VAL in v4l2-core.
9/11 documents min/max for the rectangle control.
10/11 supports MIN/MAX in UVC.
11/11 documents the changes.

Hans, Laurent, thank you for the review on v7/v8. 
It would be great if you can take another look, thanks!

Changelog since v8:
- Rebased onto media-stage master (v6.1-rc2).
- Addressed Hans' comments in 8/11 v4l2-ctrls: add support for
  V4L2_CTRL_WHICH_MIN/MAX_VAL. Including adding a new documentation patch
  9/11.
Changelog since v7:
- Rebased onto media-stage master.
- Move the factoring logic from 5/10 to 2/10 and 3/10 (new patch in v8).
- In patch 4/10, split uvc_control_mapping.size to v4l2 and data size.
- Move initializing ROI control from 5/10 into its own patch 7/10.
- Address some comments. Changelogs are in patches.

Hans Verkuil (1):
  v4l2-ctrls: add support for V4L2_CTRL_WHICH_MIN/MAX_VAL

Yunke Cao (10):
  media: v4l2_ctrl: Add V4L2_CTRL_TYPE_RECT
  media: uvcvideo: add uvc_ctrl_get_boundary for getting default value
  media: uvcvideo: introduce __uvc_ctrl_get_std()
  media: uvcvideo: Split uvc_control_mapping.size to v4l2 and data size
  media: uvcvideo: Add support for compound controls
  media: uvcvideo: implement UVC v1.5 ROI
  media: uvcvideo: initilaize ROI control to default value
  media: v4l2: document the usage of min/max for V4L2_CTRL_TYPE_RECT
  media: uvcvideo: support V4L2_CTRL_WHICH_MIN/MAX_VAL
  media: uvcvideo: document UVC v1.5 ROI

 .../userspace-api/media/drivers/uvcvideo.rst  |  64 +-
 .../media/v4l/vidioc-g-ext-ctrls.rst          |  15 +-
 .../media/v4l/vidioc-queryctrl.rst            |  11 +
 .../media/videodev2.h.rst.exceptions          |   3 +
 drivers/media/i2c/imx214.c                    |   5 +-
 .../media/platform/qcom/venus/venc_ctrls.c    |   9 +-
 drivers/media/usb/uvc/uvc_ctrl.c              | 676 ++++++++++++++----
 drivers/media/usb/uvc/uvc_driver.c            |   2 +-
 drivers/media/usb/uvc/uvc_v4l2.c              |  22 +-
 drivers/media/usb/uvc/uvcvideo.h              |  23 +-
 drivers/media/v4l2-core/v4l2-ctrls-api.c      |  57 +-
 drivers/media/v4l2-core/v4l2-ctrls-core.c     | 171 ++++-
 drivers/media/v4l2-core/v4l2-ioctl.c          |   4 +-
 include/media/v4l2-ctrls.h                    |  36 +-
 include/uapi/linux/usb/video.h                |   1 +
 include/uapi/linux/uvcvideo.h                 |  13 +
 include/uapi/linux/v4l2-controls.h            |   9 +
 include/uapi/linux/videodev2.h                |   4 +
 18 files changed, 923 insertions(+), 202 deletions(-)