media: Add ST VGXY61 camera sensor driver

Hi,

This series adds a driver for the ST VGXY61 camera sensor. This camera sensor is
using the i2c bus for control and the csi-2 bus for data.
These commits introduce the MEDIA_BUS_FMT_Y16_1X16 as a media bus format (1/4),
a standard control in V4L2 for the hdr mode (2/4), dt bindings (3/4), and the
driver (4/4).
Tested on DragonBoard 410c, Raspberry Pi 4, and Qualcomm Robotics RB5.

Thanks,

Benjamin

v3->v4:
- Standardize V4L2_CID_HDR_MODE
- Refactor to 80 characters limit
- Better types handling
- Various others
- Rebase on master

v2->v3:
- Fix errors in dt bindings
- Use alphabetical order where applicable
- Remove US_PER_MS macro
- Rename device specific macros
- Fix some control grabs not releasing
- Move user controls to public header and add documentation
- Rename set_framerate to set_framelength
- Rework i2c access
- Remove branchings that should never happen
- Rework pattern generator setting
- Update information on sensor rules of thumb
- Remove temperature control
- Remove suspend and resume
- Move mutex init to probe
- Move detect to probe
- Fix async_subdev_register order
- Support autosuspend
- Add init_cfg
- Fix controls not updating when sensor was off
- Various cleaning
- Rebase on master

v1->v2:
- Move temperature control to v4l2-controls.h as a standard control
- Reserve controls in v4l2-controls.h for HDR control
- Remove GPIO strobbing controls
- Remove references to unused controls in sensor struct
- Use v4l2_find_nearest_size
- Use V4L2_COLORSPACE_RAW instead of V4L2_COLORSPACE_SRGB
- Fill ycbcr_enc, quantization, and xfer_func in v4l2_mbus_framefmt
- Change gain from formula to a register RAW write
- Change temperature control value directly
- Remove clock-name and clock-lanes from device tree bindings
- Declare crop zones in mode_info structure
- Remove frame_interval functions and add hblank and vblank instead
- Update controls dependencies on change
- Fix first exposure rule of thumb being too restrictive
- Disable hflip and vflip controls while streaming
- Change RGB media bus code to Y as the sensor is monochrome
- Add Y16 format to v4l2 media bus formats
- Add get_selection API
- Fix timeout errors while disabling streaming on high framerates
- Support pm_runtime
- Rebase on master

Benjamin Mugnier (4):
  media: v4l: Add 1X16 16-bit greyscale media bus code definition
  media: v4l: ctrls: Add a control for HDR mode
  media: dt-bindings: media: i2c: Add ST VGXY61 camera sensor binding
  media: i2c: Add driver for ST VGXY61 camera sensor

 .../bindings/media/i2c/st,st-vgxy61.yaml      |  117 +
 .../media/v4l/ext-ctrls-camera.rst            |    8 +
 .../media/v4l/subdev-formats.rst              |   37 +
 MAINTAINERS                                   |    9 +
 drivers/media/i2c/Kconfig                     |   10 +
 drivers/media/i2c/Makefile                    |    1 +
 drivers/media/i2c/st-vgxy61.c                 | 1967 +++++++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls-defs.c     |    2 +
 include/uapi/linux/media-bus-format.h         |    3 +-
 include/uapi/linux/v4l2-controls.h            |    2 +
 10 files changed, 2155 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/st,st-vgxy61.yaml
 create mode 100644 drivers/media/i2c/st-vgxy61.c

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2.25.1