linux-kernel - [PATCH v4 1/5] v4l: Add new Colorimetry Class

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Date:   Wed, 20 Jan 2021 11:26:02 +0200
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH v4 1/5] v4l: Add new Colorimetry Class

Add Colorimetry control class for colorimetry controls

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 drivers/media/v4l2-core/v4l2-ctrls.c | 5 +++++
 include/uapi/linux/v4l2-controls.h   | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index f7b310240af2..a5137a867411 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1201,6 +1201,10 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_STATELESS_H264_SLICE_PARAMS:		return "H264 Slice Parameters";
 	case V4L2_CID_STATELESS_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
 	case V4L2_CID_STATELESS_FWHT_PARAMS:			return "FWHT Stateless 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;
 	}
@@ -1389,6 +1393,7 @@ 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 */
 		*flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 039c0d7add1b..a41039559193 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/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 */
 
@@ -1657,6 +1658,9 @@ struct v4l2_ctrl_fwht_params {
 	__u32 quantization;
 };
 
+#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
-- 
2.25.1