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    Subject[PATCH v6 5/7] media: add V4L2_CID_UNIT_CELL_SIZE control
    Date
    From: Ricardo Ribalda Delgado <ribalda@kernel.org>

    This control returns the unit cell size in nanometres. The struct provides
    the width and the height in separated fields to take into consideration
    asymmetric pixels and/or hardware binning.
    This control is required for automatic calibration of sensors/cameras.

    Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
    Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org>
    ---
    drivers/media/v4l2-core/v4l2-ctrls.c | 5 +++++
    include/uapi/linux/v4l2-controls.h | 1 +
    2 files changed, 6 insertions(+)

    diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
    index b9a46f536406..f626f9983408 100644
    --- a/drivers/media/v4l2-core/v4l2-ctrls.c
    +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
    @@ -996,6 +996,7 @@ const char *v4l2_ctrl_get_name(u32 id)
    case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
    case V4L2_CID_PAN_SPEED: return "Pan, Speed";
    case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
    + case V4L2_CID_UNIT_CELL_SIZE: return "Unit Cell Size";

    /* FM Radio Modulator controls */
    /* Keep the order of the 'case's the same as in v4l2-controls.h! */
    @@ -1377,6 +1378,10 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
    case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER:
    *type = V4L2_CTRL_TYPE_VP8_FRAME_HEADER;
    break;
    + case V4L2_CID_UNIT_CELL_SIZE:
    + *type = V4L2_CTRL_TYPE_AREA;
    + *flags |= V4L2_CTRL_FLAG_READ_ONLY;
    + break;
    default:
    *type = V4L2_CTRL_TYPE_INTEGER;
    break;
    diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
    index a2669b79b294..5a7bedee2b0e 100644
    --- a/include/uapi/linux/v4l2-controls.h
    +++ b/include/uapi/linux/v4l2-controls.h
    @@ -1034,6 +1034,7 @@ enum v4l2_jpeg_chroma_subsampling {
    #define V4L2_CID_TEST_PATTERN_GREENR (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 5)
    #define V4L2_CID_TEST_PATTERN_BLUE (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 6)
    #define V4L2_CID_TEST_PATTERN_GREENB (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 7)
    +#define V4L2_CID_UNIT_CELL_SIZE (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 8)


    /* Image processing controls */
    --
    2.23.0
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