media: v4l2-ctrls: Add camera orientation and rotation

Add support for the newly defined V4L2_CID_CAMERA_ORIENTATION
and V4L2_CID_CAMERA_SENSOR_ROTATION read-only controls used to report
the camera device mounting position and orientation respectively.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 1c617b4..92c3e39 100644 (file)
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -583,6 +583,12 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
                "Annex B Start Code",
                NULL,
        };
+       static const char * const camera_orientation[] = {
+               "Front",
+               "Back",
+               "External",
+               NULL,
+       };
 
        switch (id) {
        case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
@@ -708,6 +714,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
                return hevc_decode_mode;
        case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE:
                return hevc_start_code;
+       case V4L2_CID_CAMERA_ORIENTATION:
+               return camera_orientation;
        default:
                return NULL;
        }
@@ -1020,6 +1028,8 @@ const char *v4l2_ctrl_get_name(u32 id)
        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";
+       case V4L2_CID_CAMERA_ORIENTATION:       return "Camera Orientation";
+       case V4L2_CID_CAMERA_SENSOR_ROTATION:   return "Camera Sensor Rotation";
 
        /* FM Radio Modulator controls */
        /* Keep the order of the 'case's the same as in v4l2-controls.h! */
@@ -1293,6 +1303,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
        case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
        case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE:
        case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE:
+       case V4L2_CID_CAMERA_ORIENTATION:
                *type = V4L2_CTRL_TYPE_MENU;
                break;
        case V4L2_CID_LINK_FREQ:
@@ -1482,6 +1493,8 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
        case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
        case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
        case V4L2_CID_RDS_RX_MUSIC_SPEECH:
+       case V4L2_CID_CAMERA_ORIENTATION:
+       case V4L2_CID_CAMERA_SENSOR_ROTATION:
                *flags |= V4L2_CTRL_FLAG_READ_ONLY;
                break;
        case V4L2_CID_RF_TUNER_PLL_LOCK:

diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 0ba1005..6227141 100644 (file)
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -923,6 +923,13 @@ enum v4l2_auto_focus_range {
 #define V4L2_CID_PAN_SPEED                     (V4L2_CID_CAMERA_CLASS_BASE+32)
 #define V4L2_CID_TILT_SPEED                    (V4L2_CID_CAMERA_CLASS_BASE+33)
 
+#define V4L2_CID_CAMERA_ORIENTATION            (V4L2_CID_CAMERA_CLASS_BASE+34)
+#define V4L2_CAMERA_ORIENTATION_FRONT          0
+#define V4L2_CAMERA_ORIENTATION_BACK           1
+#define V4L2_CAMERA_ORIENTATION_EXTERNAL       2
+
+#define V4L2_CID_CAMERA_SENSOR_ROTATION                (V4L2_CID_CAMERA_CLASS_BASE+35)
+
 /* FM Modulator class control IDs */
 
 #define V4L2_CID_FM_TX_CLASS_BASE              (V4L2_CTRL_CLASS_FM_TX | 0x900)