[media] V4L: Add camera exposure metering control

The V4L2_CID_EXPOSURE_METERING control allows to determine
a method used by the camera for measuring the amount of light
available for automatic exposure.

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, 10 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index debaf9fb9004..55dd813b7341 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -230,6 +230,12 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
                 "Aperture Priority Mode",
                 NULL
         };
+        static const char * const camera_exposure_metering[] = {
+                "Average",
+                "Center Weighted",
+                "Spot",
+                NULL
+        };
         static const char * const colorfx[] = {
                 "None",
                 "Black & White",
@@ -434,6 +440,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
                 return camera_power_line_frequency;
         case V4L2_CID_EXPOSURE_AUTO:
                 return camera_exposure_auto;
+        case V4L2_CID_EXPOSURE_METERING:
+                return camera_exposure_metering;
         case V4L2_CID_COLORFX:
                 return colorfx;
         case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
@@ -632,6 +640,7 @@ const char *v4l2_ctrl_get_name(u32 id)
         case V4L2_CID_IMAGE_STABILIZATION:      return "Image Stabilization";
         case V4L2_CID_ISO_SENSITIVITY:          return "ISO Sensitivity";
         case V4L2_CID_ISO_SENSITIVITY_AUTO:     return "ISO Sensitivity, Auto";
+        case V4L2_CID_EXPOSURE_METERING:        return "Exposure, Metering Mode";
 
         /* FM Radio Modulator control */
         /* Keep the order of the 'case's the same as in videodev2.h! */
@@ -783,6 +792,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
         case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
         case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
         case V4L2_CID_ISO_SENSITIVITY_AUTO:
+        case V4L2_CID_EXPOSURE_METERING:
                 *type = V4L2_CTRL_TYPE_MENU;
                 break;
         case V4L2_CID_LINK_FREQ: