media: v4l: Add new Colorimetry Class

Add Colorimetry control class for colorimetry controls
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/v4l2-core/v4l2-ctrls.c

@@ -1215,6 +1215,10 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_STATELESS_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
 	case V4L2_CID_STATELESS_FWHT_PARAMS:			return "FWHT Stateless Parameters";
 	case V4L2_CID_STATELESS_VP8_FRAME:			return "VP8 Frame Parameters";
+
+	/* Colorimetry controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_COLORIMETRY_CLASS:	return "Colorimetry Controls";
 	default:
 		return NULL;
 	}
@@ -1418,8 +1422,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_RF_TUNER_CLASS:
 	case V4L2_CID_DETECT_CLASS:
 	case V4L2_CID_CODEC_STATELESS_CLASS:
+	case V4L2_CID_COLORIMETRY_CLASS:
 		*type = V4L2_CTRL_TYPE_CTRL_CLASS;
-		/* You can neither read not write these */
+		/* You can neither read nor write these */
 		*flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
 		*min = *max = *step = *def = 0;
 		break;

include/uapi/linux/v4l2-controls.h

@@ -66,6 +66,7 @@
 #define V4L2_CTRL_CLASS_RF_TUNER	0x00a20000	/* RF tuner controls */
 #define V4L2_CTRL_CLASS_DETECT		0x00a30000	/* Detection controls */
 #define V4L2_CTRL_CLASS_CODEC_STATELESS 0x00a40000	/* Stateless codecs controls */
+#define V4L2_CTRL_CLASS_COLORIMETRY	0x00a50000	/* Colorimetry controls */
 
 /* User-class control IDs */
 
@@ -1861,6 +1862,9 @@ struct v4l2_ctrl_vp8_frame {
 	__u64 flags;
 };
 
+#define V4L2_CID_COLORIMETRY_CLASS_BASE	(V4L2_CTRL_CLASS_COLORIMETRY | 0x900)
+#define V4L2_CID_COLORIMETRY_CLASS	(V4L2_CTRL_CLASS_COLORIMETRY | 1)
+
 /* MPEG-compression definitions kept for backwards compatibility */
 #ifndef __KERNEL__
 #define V4L2_CTRL_CLASS_MPEG            V4L2_CTRL_CLASS_CODEC