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.
Signed-off-by: Ricardo Ribalda Delgado <ribalda@xxxxxxxxxx>
---
v3:
-Put together all actions on ctrl_fill
-Move the control to IMAGE_SOURCE
drivers/media/v4l2-core/v4l2-ctrls.c | 11 +++++++++++
include/media/v4l2-ctrls.h | 2 ++
include/uapi/linux/v4l2-controls.h | 1 +
include/uapi/linux/videodev2.h | 11 +++++++++++
4 files changed, 25 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 1d8f38824631..b3bf458df7f7 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -994,6 +994,7 @@ 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! */
@@ -1375,6 +1376,10 @@ 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;
@@ -1723,6 +1728,9 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
case V4L2_CTRL_TYPE_FWHT_PARAMS:
break;
+ case V4L2_CTRL_TYPE_AREA:
+ break;
+
case V4L2_CTRL_TYPE_H264_SPS:
case V4L2_CTRL_TYPE_H264_PPS:
case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
@@ -2421,6 +2429,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
case V4L2_CTRL_TYPE_VP8_FRAME_HEADER:
elem_size = sizeof(struct v4l2_ctrl_vp8_frame_header);
break;
+ case V4L2_CTRL_TYPE_AREA:
+ elem_size = sizeof(struct v4l2_area);
+ break;
default:
if (type < V4L2_CTRL_COMPOUND_TYPES)
elem_size = sizeof(s32);
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 570ff4b0205a..9a3d11350e67 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -50,6 +50,7 @@ struct poll_table_struct;
* @p_h264_slice_params: Pointer to a struct v4l2_ctrl_h264_slice_params.
* @p_h264_decode_params: Pointer to a struct v4l2_ctrl_h264_decode_params.
* @p_vp8_frame_header: Pointer to a VP8 frame header structure.
+ * @p_area: Pointer to an area.
* @p: Pointer to a compound value.
*/
union v4l2_ctrl_ptr {
@@ -68,6 +69,7 @@ union v4l2_ctrl_ptr {
struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
struct v4l2_ctrl_h264_decode_params *p_h264_decode_params;
struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header;
+ struct v4l2_area *p_area;
void *p;
};
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 */
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 530638dffd93..05cfc69d7ed6 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -422,6 +422,11 @@ struct v4l2_fract {
__u32 denominator;
};
+struct v4l2_area {
+ __u32 width;
+ __u32 height;
+};
+
/**
* struct v4l2_capability - Describes V4L2 device caps returned by VIDIOC_QUERYCAP
*
@@ -1720,6 +1725,12 @@ enum v4l2_ctrl_type {
V4L2_CTRL_TYPE_U8 = 0x0100,
V4L2_CTRL_TYPE_U16 = 0x0101,
V4L2_CTRL_TYPE_U32 = 0x0102,
+ /*
+ * V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS = 0x0103,
+ * V4L2_CTRL_TYPE_MPEG2_QUANTIZATION = 0x0104,
+ * V4L2_CTRL_TYPE_FWHT_PARAMS = 0x0105,
+ */
+ V4L2_CTRL_TYPE_AREA = 0x0106,
};
/* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */
--
2.23.0.rc1
