Add p_region to struct v4l2_ext_control with basic support in
v4l2-ctrls.

Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: TaoJiang <tao.jiang_2@nxp.com>
---
 .../userspace-api/media/v4l/vidioc-g-ext-ctrls.rst |  4 ++++
 .../userspace-api/media/v4l/vidioc-queryctrl.rst   | 12 ++++++++++++
 .../userspace-api/media/videodev2.h.rst.exceptions |  1 +
 drivers/media/v4l2-core/v4l2-ctrls-core.c          | 14 +++++++++++++-
 include/media/v4l2-ctrls.h                         |  2 ++
 include/uapi/linux/videodev2.h                     |  8 ++++++++
 6 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
index b8698b85bd80..f00c6d1f7784 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
@@ -203,6 +203,10 @@ still cause this situation.
       - ``p_rect``
       - A pointer to a struct :c:type:`v4l2_rect`. Valid if this control is
         of type ``V4L2_CTRL_TYPE_RECT``.
+    * - struct :c:type:`v4l2_ctrl_video_region_param` *
+      - ``p_region``
+      - A pointer to a struct :c:type:`v4l2_ctrl_video_region_param`. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_REGION``.
     * - struct :c:type:`v4l2_ctrl_h264_sps` *
       - ``p_h264_sps``
       - A pointer to a struct :c:type:`v4l2_ctrl_h264_sps`. Valid if this control is
diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
index 3815732f6a9b..df3cd36b67ab 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
@@ -451,6 +451,18 @@ See also the examples in :ref:`control`.
 	``V4L2_CTRL_WHICH_MAX_VAL`` is optional and depends on the
 	``V4L2_CTRL_FLAG_HAS_WHICH_MIN_MAX`` flag. See the documentation of
 	the specific control on how to interpret the minimum and maximum values.
+    * - ``V4L2_CTRL_TYPE_REGION``
+      - n/a
+      - n/a
+      - n/a
+      - A struct :c:type:`v4l2_ctrl_video_region_param`, containing a rectangle
+	described by the position of its top-left corner, the width and the height.
+	And a parameter for detailed purpose, for example, it's QP offset for video
+	encoder ROI. Units depend on the use case. Support for
+	``V4L2_CTRL_WHICH_MIN_VAL`` and ``V4L2_CTRL_WHICH_MAX_VAL`` is optional and
+	depends on the ``V4L2_CTRL_FLAG_HAS_WHICH_MIN_MAX`` flag. See the
+	documentation of the specific control on how to interpret the minimum and
+	maximum values.
     * - ``V4L2_CTRL_TYPE_H264_SPS``
       - n/a
       - n/a
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index 35d3456cc812..22307e029883 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -151,6 +151,7 @@ replace symbol V4L2_CTRL_TYPE_HEVC_PPS :c:type:`v4l2_ctrl_type`
 replace symbol V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
 replace symbol V4L2_CTRL_TYPE_AREA :c:type:`v4l2_ctrl_type`
 replace symbol V4L2_CTRL_TYPE_RECT :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_REGION :c:type:`v4l2_ctrl_type`
 replace symbol V4L2_CTRL_TYPE_FWHT_PARAMS :c:type:`v4l2_ctrl_type`
 replace symbol V4L2_CTRL_TYPE_VP8_FRAME :c:type:`v4l2_ctrl_type`
 replace symbol V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR :c:type:`v4l2_ctrl_type`
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c
index 9642a1f242e3..8235e681acb1 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-core.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
@@ -441,6 +441,11 @@ void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl)
 			ptr.p_rect->width, ptr.p_rect->height,
 			ptr.p_rect->left, ptr.p_rect->top);
 		break;
+	case V4L2_CTRL_TYPE_REGION:
+		pr_cont("%ux%u@%dx%d, %d",
+			ptr.p_rect->width, ptr.p_rect->height,
+			ptr.p_rect->left, ptr.p_rect->top, ptr.p_region->parameter);
+		break;
 	default:
 		pr_cont("unknown type %d", ctrl->type);
 		break;
@@ -886,6 +891,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
 	struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params;
 	struct v4l2_area *area;
 	struct v4l2_rect *rect;
+	struct v4l2_ctrl_video_region_param *p_region;
 	void *p = ptr.p + idx * ctrl->elem_size;
 	unsigned int i;
 
@@ -1248,7 +1254,10 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
 		if (!rect->width || !rect->height)
 			return -EINVAL;
 		break;
-
+	case V4L2_CTRL_TYPE_REGION:
+		p_region = p;
+		zero_reserved(*p_region);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -1957,6 +1966,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	case V4L2_CTRL_TYPE_RECT:
 		elem_size = sizeof(struct v4l2_rect);
 		break;
+	case V4L2_CTRL_TYPE_REGION:
+		elem_size = sizeof(struct v4l2_ctrl_video_region_param);
+		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 9ed7be1e696f..299451b33e7f 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -57,6 +57,7 @@ struct video_device;
  * @p_av1_frame:		Pointer to an AV1 frame structure.
  * @p_av1_film_grain:		Pointer to an AV1 film grain structure.
  * @p_rect:			Pointer to a rectangle.
+ * @p_region:			Pointer to a video region
  * @p:				Pointer to a compound value.
  * @p_const:			Pointer to a constant compound value.
  */
@@ -91,6 +92,7 @@ union v4l2_ctrl_ptr {
 	struct v4l2_ctrl_av1_frame *p_av1_frame;
 	struct v4l2_ctrl_av1_film_grain *p_av1_film_grain;
 	struct v4l2_rect *p_rect;
+	struct v4l2_ctrl_video_region_param *p_region;
 	void *p;
 	const void *p_const;
 };
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4007041302d3..503cbb884734 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -448,6 +448,12 @@ struct v4l2_area {
 	__u32   height;
 };
 
+struct v4l2_ctrl_video_region_param {
+	struct v4l2_rect rect;
+	__s32 parameter;
+	__u32 reserved[2];
+};
+
 /**
   * struct v4l2_capability - Describes V4L2 device caps returned by VIDIOC_QUERYCAP
   *
@@ -1858,6 +1864,7 @@ struct v4l2_ext_control {
 		__s64 __user *p_s64;
 		struct v4l2_area __user *p_area;
 		struct v4l2_rect __user *p_rect;
+		struct v4l2_ctrl_video_region_param __user *p_region;
 		struct v4l2_ctrl_h264_sps __user *p_h264_sps;
 		struct v4l2_ctrl_h264_pps __user *p_h264_pps;
 		struct v4l2_ctrl_h264_scaling_matrix __user *p_h264_scaling_matrix;
@@ -1931,6 +1938,7 @@ enum v4l2_ctrl_type {
 	V4L2_CTRL_TYPE_U32	     = 0x0102,
 	V4L2_CTRL_TYPE_AREA          = 0x0106,
 	V4L2_CTRL_TYPE_RECT	     = 0x0107,
+	V4L2_CTRL_TYPE_REGION        = 0x0108,
 
 	V4L2_CTRL_TYPE_HDR10_CLL_INFO		= 0x0110,
 	V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY	= 0x0111,
-- 
2.43.0-rc1