[PATCH v7 1/7] media: v4l2_ctrl: Add V4L2_CTRL_TYPE_RECT

[Yunke Cao <yunkec@google.com>]

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

Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Yunke Cao <yunkec@google.com>
---
 .../media/v4l/vidioc-g-ext-ctrls.rst          |  4 ++++
 .../media/videodev2.h.rst.exceptions          |  1 +
 drivers/media/v4l2-core/v4l2-ctrls-core.c     | 20 +++++++++++++++++++
 include/media/v4l2-ctrls.h                    |  2 ++
 include/uapi/linux/videodev2.h                |  2 ++
 5 files changed, 29 insertions(+)

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 29971a45a2d4..7473baa4e977 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
@@ -189,6 +189,10 @@ still cause this situation.
       - ``p_area``
       - A pointer to a struct :c:type:`v4l2_area`. Valid if this control is
         of type ``V4L2_CTRL_TYPE_AREA``.
+    * - struct :c:type:`v4l2_rect` *
+      - ``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_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/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index 9cbb7a0c354a..7b423475281d 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -147,6 +147,7 @@ replace symbol V4L2_CTRL_TYPE_HEVC_SPS :c:type:`v4l2_ctrl_type`
 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_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 949c1884d9c1..35d43ba650db 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-core.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
@@ -84,6 +84,11 @@ static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
 		return ptr1.p_u16[idx] == ptr2.p_u16[idx];
 	case V4L2_CTRL_TYPE_U32:
 		return ptr1.p_u32[idx] == ptr2.p_u32[idx];
+	case V4L2_CTRL_TYPE_RECT:
+		return ptr1.p_rect->top == ptr2.p_rect->top &&
+		       ptr1.p_rect->left == ptr2.p_rect->left &&
+		       ptr1.p_rect->height == ptr2.p_rect->height &&
+		       ptr1.p_rect->width == ptr2.p_rect->width;
 	default:
 		if (ctrl->is_int)
 			return ptr1.p_s32[idx] == ptr2.p_s32[idx];
@@ -307,6 +312,11 @@ static void std_log(const struct v4l2_ctrl *ctrl)
 	case V4L2_CTRL_TYPE_VP9_FRAME:
 		pr_cont("VP9_FRAME");
 		break;
+	case V4L2_CTRL_TYPE_RECT:
+		pr_cont("%ux%u@%dx%d",
+			ptr.p_rect->width, ptr.p_rect->height,
+			ptr.p_rect->left, ptr.p_rect->top);
+		break;
 	default:
 		pr_cont("unknown type %d", ctrl->type);
 		break;
@@ -525,6 +535,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
 	struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
 	struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params;
 	struct v4l2_area *area;
+	struct v4l2_rect *rect;
 	void *p = ptr.p + idx * ctrl->elem_size;
 	unsigned int i;
 
@@ -888,6 +899,12 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
 			return -EINVAL;
 		break;
 
+	case V4L2_CTRL_TYPE_RECT:
+		rect = p;
+		if (!rect->width || !rect->height)
+			return -EINVAL;
+		break;
+
 	default:
 		return -EINVAL;
 	}
@@ -1455,6 +1472,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	case V4L2_CTRL_TYPE_AREA:
 		elem_size = sizeof(struct v4l2_area);
 		break;
+	case V4L2_CTRL_TYPE_RECT:
+		elem_size = sizeof(struct v4l2_rect);
+		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 b3ce438f1329..919e104de50b 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -58,6 +58,7 @@ struct video_device;
  * @p_hdr10_cll:		Pointer to an HDR10 Content Light Level structure.
  * @p_hdr10_mastering:		Pointer to an HDR10 Mastering Display structure.
  * @p_area:			Pointer to an area.
+ * @p_rect:			Pointer to a rectangle.
  * @p:				Pointer to a compound value.
  * @p_const:			Pointer to a constant compound value.
  */
@@ -87,6 +88,7 @@ union v4l2_ctrl_ptr {
 	struct v4l2_ctrl_hdr10_cll_info *p_hdr10_cll;
 	struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
 	struct v4l2_area *p_area;
+	struct v4l2_rect *p_rect;
 	void *p;
 	const void *p_const;
 };
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 343b95107fce..2e36bb610ea6 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1754,6 +1754,7 @@ struct v4l2_ext_control {
 		__u16 __user *p_u16;
 		__u32 __user *p_u32;
 		struct v4l2_area __user *p_area;
+		struct v4l2_rect __user *p_rect;
 		struct v4l2_ctrl_h264_sps __user *p_h264_sps;
 		struct v4l2_ctrl_h264_pps *p_h264_pps;
 		struct v4l2_ctrl_h264_scaling_matrix __user *p_h264_scaling_matrix;
@@ -1813,6 +1814,7 @@ enum v4l2_ctrl_type {
 	V4L2_CTRL_TYPE_U16	     = 0x0101,
 	V4L2_CTRL_TYPE_U32	     = 0x0102,
 	V4L2_CTRL_TYPE_AREA          = 0x0106,
+	V4L2_CTRL_TYPE_RECT	     = 0x0107,
 
 	V4L2_CTRL_TYPE_HDR10_CLL_INFO		= 0x0110,
 	V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY	= 0x0111,
-- 
2.37.0.rc0.161.g10f37bed90-goog