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 1/4 starts by addressing the first issue, namely the frame interval operations being video ops. This requires touching all the drivers using frame intervals. Patch 2/4 then 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 3/4 adds support for storing the frame interval in the subdev state, alongside the formats and selection rectangles, with similar accessors and helper functions. Finally, patch 4/4 demonstrates how this is used in drivers, with the thp7312 driver serving as an example. This driver isn't upstream yet, the latest version can be found on the linux-media mailing list ([1]). Sakari, these patches conflict with your "[PATCH v3 0/8] Unify sub-device state access functions" series. I plan to rebase on top once it reaches the media tree. This shouldn't prevent reviewing this RFC in the meantime :-) [1] https://lore.kernel.org/linux-media/20231017132103.9914-1-laurent.pinchart@xxxxxxxxxxxxxxxx/ Laurent Pinchart (4): 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: i2c: thp7312: Store frame interval in subdev state .../media/v4l/vidioc-subdev-g-client-cap.rst | 5 + .../v4l/vidioc-subdev-g-frame-interval.rst | 17 +- 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 | 145 ++++++++++-------- 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 | 120 +++++++++++---- .../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 | 79 ++++++++-- include/uapi/linux/v4l2-subdev.h | 13 +- 44 files changed, 706 insertions(+), 404 deletions(-) -- Regards, Laurent Pinchart
