[PATCH v4 0/8] media: v4l2-subdev: Improve frame interval handling

Laurent Pinchart
2023-12-08T18:14:40Z

Hello,

This patch series improves frame interval handling in the V4L2 subdev
in-kernel and userspace APIs.

Frame interval are exposed to userspace on pads and streams, but the
frame interval handling is currently implemented through a v4l2_subdev
video operation, without involving the subdev state. This makes frame
intervals a second class citizen compared to formats and selection
rectangles.

Patch 1/8 is a preparatory fix that Tomi posted today, and on which this
series depends. I've included here for completeness.

Patch 2/8 then starts the work by addressing the first issue, namely the
frame interval operations being video ops. This requires touching all
the drivers using frame intervals.

Patch 3/8 adds a 'which' field to the subdev frame interval userspace
API, allowing frame intervals to be tried the same way formats and
selection rectangles can. Again, the same drivers need to be touched to
preserve their current behaviour.

Patch 4/8 adds support for storing the frame interval in the subdev
state, alongside the formats and selection rectangles, with similar
accessors and helper functions.

Patches 5/8 to 7/8 address small issues in the subdev uAPI documentation
that were raised during review of v2 or discovered when working on v3.

Finally, patch 8/8 demonstrates how this is used in drivers, with the
thp7312 driver serving as an example.

The series is based on the latest stage master branch.

Given the large number of drivers that this series touches, I would like
to get it merged in v6.8 without too much delay to avoid rebasing.

Laurent Pinchart (7):
media: v4l2-subdev: Turn .[gs]_frame_interval into pad operations
media: v4l2-subdev: Add which field to struct
v4l2_subdev_frame_interval
media: v4l2-subdev: Store frame interval in subdev state
media: docs: uAPI: Clarify error documentation for invalid 'which'
value
media: docs: uAPI: Expand error documentation for invalid 'which'
value
media: docs: uAPI: Fix documentation of 'which' field for routing
ioctls
media: i2c: thp7312: Store frame interval in subdev state

Tomi Valkeinen (1):
media: v4l: subdev: Move out subdev state lock macros outside
CONFIG_MEDIA_CONTROLLER

.../v4l/vidioc-subdev-enum-frame-interval.rst | 9 +-
.../v4l/vidioc-subdev-enum-frame-size.rst | 7 +-
.../v4l/vidioc-subdev-enum-mbus-code.rst | 7 +-
.../media/v4l/vidioc-subdev-g-client-cap.rst | 5 +
.../media/v4l/vidioc-subdev-g-crop.rst | 7 +-
.../media/v4l/vidioc-subdev-g-fmt.rst | 5 +-
.../v4l/vidioc-subdev-g-frame-interval.rst | 20 +-
.../media/v4l/vidioc-subdev-g-routing.rst | 7 +-
.../media/v4l/vidioc-subdev-g-selection.rst | 7 +-
drivers/media/i2c/adv7180.c | 10 +-
drivers/media/i2c/et8ek8/et8ek8_driver.c | 12 +-
drivers/media/i2c/imx214.c | 12 +-
drivers/media/i2c/imx274.c | 54 ++--
drivers/media/i2c/max9286.c | 20 +-
drivers/media/i2c/mt9m111.c | 20 +-
drivers/media/i2c/mt9m114.c | 20 +-
drivers/media/i2c/mt9v011.c | 24 +-
drivers/media/i2c/mt9v111.c | 22 +-
drivers/media/i2c/ov2680.c | 10 +-
drivers/media/i2c/ov5640.c | 22 +-
drivers/media/i2c/ov5648.c | 62 ++---
drivers/media/i2c/ov5693.c | 10 +-
drivers/media/i2c/ov6650.c | 22 +-
drivers/media/i2c/ov7251.c | 12 +-
drivers/media/i2c/ov7670.c | 22 +-
drivers/media/i2c/ov772x.c | 20 +-
drivers/media/i2c/ov7740.c | 40 ++-
drivers/media/i2c/ov8865.c | 54 ++--
drivers/media/i2c/ov9650.c | 20 +-
drivers/media/i2c/s5c73m3/s5c73m3-core.c | 20 +-
drivers/media/i2c/s5k5baf.c | 26 +-
drivers/media/i2c/thp7312.c | 160 ++++++------
drivers/media/i2c/tvp514x.c | 33 +--
drivers/media/usb/em28xx/em28xx-video.c | 6 +-
drivers/media/v4l2-core/v4l2-common.c | 8 +-
drivers/media/v4l2-core/v4l2-subdev.c | 130 +++++++---
.../media/atomisp/i2c/atomisp-gc0310.c | 10 +-
.../media/atomisp/i2c/atomisp-gc2235.c | 10 +-
.../media/atomisp/i2c/atomisp-mt9m114.c | 10 +-
.../media/atomisp/i2c/atomisp-ov2722.c | 10 +-
.../staging/media/atomisp/pci/atomisp_cmd.c | 4 +-
.../staging/media/atomisp/pci/atomisp_ioctl.c | 4 +-
drivers/staging/media/imx/imx-ic-prp.c | 20 +-
drivers/staging/media/imx/imx-ic-prpencvf.c | 20 +-
drivers/staging/media/imx/imx-media-capture.c | 6 +-
drivers/staging/media/imx/imx-media-csi.c | 20 +-
drivers/staging/media/imx/imx-media-vdic.c | 20 +-
drivers/staging/media/tegra-video/csi.c | 12 +-
include/media/v4l2-common.h | 4 +-
include/media/v4l2-subdev.h | 231 +++++++++++-------
include/uapi/linux/v4l2-subdev.h | 15 +-
51 files changed, 815 insertions(+), 526 deletions(-)

base-commit: e55a9482888da73eeadde5f13ef8bafce68a38ed