This series adds a new v4l2 controls named "strobe duration" with id V4L2_CID_FLASH_DURATION. This control enables setting a desired flash/strobe length/duration in µs. As a first user of this new control add basic flash/strobe support for ov9282 sensors using their "hardware strobe output". The duration calculation is only interpolated from various measurements, as no documentation was found. Further flash/strobe-related controls as well as a migration to v4l2-cci helpers for ov9282 will likely be implemented in future series. All register addresses/values are based on the OV9281 datasheet v1.53 (january 2019). This series was tested using an ov9281 VisionComponents camera module. Signed-off-by: Richard Leitner <richard.leitner@xxxxxxxxx> --- Changes in v2: - remove not needed controls in struct ov9282 (thanks Dave) - Fix commit message of 3/3 regarding framerate get/set (thanks Dave) - Add V4L2_CID_FLASH_STROBE_SOURCE impementation to ov9282 - Add new V4L2_CID_FLASH_DURATION control (as suggested by Laurent) - Use FLASH_DURATION instead of FLASH_TIMEOUT for ov9282 - Link to v1: https://lore.kernel.org/r/20250303-ov9282-flash-strobe-v1-0-0fd57a1564ba@xxxxxxxxx --- Richard Leitner (8): media: v4l: ctrls: add a control for flash/strobe duration media: v4l2-flash: add support for flash/stobe duration media: v4l2-flash: fix flash_timeout comment Documentation: uAPI: media: add V4L2_CID_FLASH_DURATION media: i2c: ov9282: add output enable register definitions media: i2c: ov9282: add led_mode v4l2 control media: i2c: ov9282: add strobe_duration v4l2 control media: i2c: ov9282: add strobe_source v4l2 control .../userspace-api/media/v4l/ext-ctrls-flash.rst | 5 ++ drivers/leds/led-class-flash.c | 15 ++++ drivers/media/i2c/ov9282.c | 92 +++++++++++++++++++++- drivers/media/v4l2-core/v4l2-ctrls-defs.c | 1 + drivers/media/v4l2-core/v4l2-flash-led-class.c | 13 +++ include/linux/led-class-flash.h | 18 ++++- include/uapi/linux/v4l2-controls.h | 1 + 7 files changed, 141 insertions(+), 4 deletions(-) --- base-commit: 9fc81f92bc8a84772e4a4094649601e7665a6092 change-id: 20250303-ov9282-flash-strobe-ac6bd00c9de6 prerequisite-change-id: 20250225-b4-ov9282-gain-ef1cdaba5bfd:v1 prerequisite-patch-id: 86f2582378ff7095ab65ce4bb25a143eb639e840 prerequisite-patch-id: b06eb6ec697aaf0b3155b4b2370f171d0d304ae2 prerequisite-patch-id: b123047d71bfb9b93f743bbdd6893d5a98495801 Best regards, -- Richard Leitner <richard.leitner@xxxxxxxxx>
