[media] V4L: Add camera 3A lock control

The V4L2_CID_3A_LOCK bitmask control allows applications to pause
or resume the automatic exposure, focus and wite balance adjustments.
It can be used, for example, to lock the 3A adjustments right before
a still image is captured, for pre-focus, etc.
The applications can control each of the algorithms independently,
through a corresponding control bit, if driver allows that.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index d4dc8ba7b755..a47b29270ba3 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -661,6 +661,7 @@ const char *v4l2_ctrl_get_name(u32 id)
         case V4L2_CID_ISO_SENSITIVITY_AUTO:     return "ISO Sensitivity, Auto";
         case V4L2_CID_EXPOSURE_METERING:        return "Exposure, Metering Mode";
         case V4L2_CID_SCENE_MODE:               return "Scene Mode";
+        case V4L2_CID_3A_LOCK:                  return "3A Lock";
 
         /* FM Radio Modulator control */
         /* Keep the order of the 'case's the same as in videodev2.h! */
@@ -849,6 +850,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
                 break;
         case V4L2_CID_FLASH_FAULT:
         case V4L2_CID_JPEG_ACTIVE_MARKER:
+        case V4L2_CID_3A_LOCK:
                 *type = V4L2_CTRL_TYPE_BITMASK;
                 break;
         case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: