[media] v4l: VIDIOC_SUBDEV_S_SELECTION and VIDIOC_SUBDEV_G_SELECTION IOCTLs

Add support for VIDIOC_SUBDEV_S_SELECTION and VIDIOC_SUBDEV_G_SELECTION
IOCTLs. They replace functionality provided by VIDIOC_SUBDEV_S_CROP and
VIDIOC_SUBDEV_G_CROP IOCTLs and also add new functionality (composing).

VIDIOC_SUBDEV_G_CROP and VIDIOC_SUBDEV_S_CROP continue to be supported.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/include/linux/v4l2-subdev.h b/include/linux/v4l2-subdev.h
index ed29cbbebfef..812019ee1e06 100644
--- a/include/linux/v4l2-subdev.h
+++ b/include/linux/v4l2-subdev.h
@@ -123,6 +123,43 @@ struct v4l2_subdev_frame_interval_enum {
         __u32 reserved[9];
 };
 
+#define V4L2_SUBDEV_SEL_FLAG_SIZE_GE                    (1 << 0)
+#define V4L2_SUBDEV_SEL_FLAG_SIZE_LE                    (1 << 1)
+#define V4L2_SUBDEV_SEL_FLAG_KEEP_CONFIG                (1 << 2)
+
+/* active cropping area */
+#define V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL                 0x0000
+/* cropping bounds */
+#define V4L2_SUBDEV_SEL_TGT_CROP_BOUNDS                 0x0002
+/* current composing area */
+#define V4L2_SUBDEV_SEL_TGT_COMPOSE_ACTUAL              0x0100
+/* composing bounds */
+#define V4L2_SUBDEV_SEL_TGT_COMPOSE_BOUNDS              0x0102
+
+
+/**
+ * struct v4l2_subdev_selection - selection info
+ *
+ * @which: either V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY
+ * @pad: pad number, as reported by the media API
+ * @target: selection target, used to choose one of possible rectangles
+ * @flags: constraint flags
+ * @r: coordinates of the selection window
+ * @reserved: for future use, set to zero for now
+ *
+ * Hardware may use multiple helper windows to process a video stream.
+ * The structure is used to exchange this selection areas between
+ * an application and a driver.
+ */
+struct v4l2_subdev_selection {
+        __u32 which;
+        __u32 pad;
+        __u32 target;
+        __u32 flags;
+        struct v4l2_rect r;
+        __u32 reserved[8];
+};
+
 #define VIDIOC_SUBDEV_G_FMT     _IOWR('V',  4, struct v4l2_subdev_format)
 #define VIDIOC_SUBDEV_S_FMT     _IOWR('V',  5, struct v4l2_subdev_format)
 #define VIDIOC_SUBDEV_G_FRAME_INTERVAL \
@@ -137,5 +174,9 @@ struct v4l2_subdev_frame_interval_enum {
                         _IOWR('V', 75, struct v4l2_subdev_frame_interval_enum)
 #define VIDIOC_SUBDEV_G_CROP    _IOWR('V', 59, struct v4l2_subdev_crop)
 #define VIDIOC_SUBDEV_S_CROP    _IOWR('V', 60, struct v4l2_subdev_crop)
+#define VIDIOC_SUBDEV_G_SELECTION \
+        _IOWR('V', 61, struct v4l2_subdev_selection)
+#define VIDIOC_SUBDEV_S_SELECTION \
+        _IOWR('V', 62, struct v4l2_subdev_selection)
 
 #endif