linux-kernel - [PATCH v2 02/13] media: v4l: add some definition of v4l2 colorspace/xfer_func/ycbcr

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Date:   Mon,  7 Jun 2021 16:42:49 +0800
From:   Ming Qian <ming.qian@....com>
To:     mchehab@...nel.org, shawnguo@...nel.org, robh+dt@...nel.org,
        s.hauer@...gutronix.de
Cc:     hverkuil-cisco@...all.nl, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, aisheng.dong@....com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 02/13] media: v4l: add some definition of v4l2 colorspace/xfer_func/ycbcr_encoding

Some definition of colorspace/xfer_func/ycbcr_encoding
are defined in ISO, but missed in V4L2,
so add some definition according VPU driver's requirement

Signed-off-by: Ming Qian <ming.qian@....com>
Signed-off-by: Shijie Qin <shijie.qin@....com>
Signed-off-by: Zhou Peng <eagle.zhou@....com>
---
 include/uapi/linux/videodev2.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 534eaa4d39bc..545f2c329bc9 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -247,6 +247,12 @@ enum v4l2_colorspace {
 
 	/* DCI-P3 colorspace, used by cinema projectors */
 	V4L2_COLORSPACE_DCI_P3        = 12,
+
+	/* Generic film (colour filters using Illuminant C) */
+	V4L2_COLORSPACE_GENERIC_FILM  = 13,
+
+	/* SMPTE ST 428-1 */
+	V4L2_COLORSPACE_ST428         = 14,
 };
 
 /*
@@ -276,6 +282,20 @@ enum v4l2_xfer_func {
 	 * V4L2_COLORSPACE_RAW: V4L2_XFER_FUNC_NONE
 	 *
 	 * V4L2_COLORSPACE_DCI_P3: V4L2_XFER_FUNC_DCI_P3
+	 *
+	 * V4L2_XFER_FUNC_LINEAR: Linear transfer characteristics
+	 *
+	 * V4L2_XFER_FUNC_GAMMA22: Assumed display gamma 2.2
+	 *
+	 * V4L2_XFER_FUNC_GAMMA28: Assumed display gamma 2.8
+	 *
+	 * V4L2_XFER_FUNC_HLG: STD-B67, Rec. ITU-R BT.2100-2 hybrid-log-gamma
+	 *
+	 * V4L2_XFER_FUNC_XVYCC: IEC 61966-2-4
+	 *
+	 * V4L2_XFER_FUNC_BT1361: Rec. ITU-R BT.1361-0 extended colour gamut
+	 *
+	 * V4L2_XFER_FUNC_ST428: SMPTE ST 428-1
 	 */
 	V4L2_XFER_FUNC_DEFAULT     = 0,
 	V4L2_XFER_FUNC_709         = 1,
@@ -285,6 +305,13 @@ enum v4l2_xfer_func {
 	V4L2_XFER_FUNC_NONE        = 5,
 	V4L2_XFER_FUNC_DCI_P3      = 6,
 	V4L2_XFER_FUNC_SMPTE2084   = 7,
+	V4L2_XFER_FUNC_LINEAR      = 8,
+	V4L2_XFER_FUNC_GAMMA22     = 9,
+	V4L2_XFER_FUNC_GAMMA28     = 10,
+	V4L2_XFER_FUNC_HLG         = 11,
+	V4L2_XFER_FUNC_XVYCC       = 12,
+	V4L2_XFER_FUNC_BT1361      = 13,
+	V4L2_XFER_FUNC_ST428       = 14,
 };
 
 /*
@@ -345,6 +372,9 @@ enum v4l2_ycbcr_encoding {
 
 	/* SMPTE 240M -- Obsolete HDTV */
 	V4L2_YCBCR_ENC_SMPTE240M      = 8,
+
+	/* KR=0.30, KB=0.11 or equivalent */
+	V4L2_YCBCR_ENC_BT470_6M       = 9,
 };
 
 /*
-- 
2.31.1