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Subject[PATCH v5 3/5] v4l: Add HDR10 static metadata controls
Date
Introduce Content light level and Mastering display colour
volume Colorimetry compound controls with relevant payload
structures and validation.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
drivers/media/v4l2-core/v4l2-ctrls.c | 67 ++++++++++++++++++++++++++++
include/media/v4l2-ctrls.h | 4 ++
include/uapi/linux/v4l2-controls.h | 31 +++++++++++++
include/uapi/linux/videodev2.h | 3 ++
4 files changed, 105 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 335cf354f51b..8bd3cf0e1e4f 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1205,6 +1205,8 @@ const char *v4l2_ctrl_get_name(u32 id)
/* Colorimetry controls */
/* Keep the order of the 'case's the same as in v4l2-controls.h! */
case V4L2_CID_COLORIMETRY_CLASS: return "Colorimetry Controls";
+ case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO: return "HDR10 Content Light Info";
+ case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY: return "HDR10 Mastering Display";
default:
return NULL;
}
@@ -1491,6 +1493,12 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
*type = V4L2_CTRL_TYPE_AREA;
*flags |= V4L2_CTRL_FLAG_READ_ONLY;
break;
+ case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO:
+ *type = V4L2_CTRL_TYPE_HDR10_CLL_INFO;
+ break;
+ case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY:
+ *type = V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY;
+ break;
default:
*type = V4L2_CTRL_TYPE_INTEGER;
break;
@@ -1786,6 +1794,12 @@ static void std_log(const struct v4l2_ctrl *ctrl)
case V4L2_CTRL_TYPE_FWHT_PARAMS:
pr_cont("FWHT_PARAMS");
break;
+ case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
+ pr_cont("HDR10_CLL_INFO");
+ break;
+ case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
+ pr_cont("HDR10_MASTERING_DISPLAY");
+ break;
default:
pr_cont("unknown type %d", ctrl->type);
break;
@@ -1838,6 +1852,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
struct v4l2_ctrl_hevc_sps *p_hevc_sps;
struct v4l2_ctrl_hevc_pps *p_hevc_pps;
struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
+ struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
struct v4l2_area *area;
void *p = ptr.p + idx * ctrl->elem_size;
unsigned int i;
@@ -2133,6 +2148,52 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
zero_padding(*p_hevc_slice_params);
break;

+ case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
+ break;
+
+ case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
+ p_hdr10_mastering = p;
+
+ for (i = 0; i < 3; ++i) {
+ if (p_hdr10_mastering->display_primaries_x[i] <
+ V4L2_HDR10_MASTERING_PRIMARIES_X_LOW ||
+ p_hdr10_mastering->display_primaries_x[i] >
+ V4L2_HDR10_MASTERING_PRIMARIES_X_HIGH ||
+ p_hdr10_mastering->display_primaries_y[i] <
+ V4L2_HDR10_MASTERING_PRIMARIES_Y_LOW ||
+ p_hdr10_mastering->display_primaries_y[i] >
+ V4L2_HDR10_MASTERING_PRIMARIES_Y_HIGH)
+ return -EINVAL;
+ }
+
+ if (p_hdr10_mastering->white_point_x <
+ V4L2_HDR10_MASTERING_WHITE_POINT_X_LOW ||
+ p_hdr10_mastering->white_point_x >
+ V4L2_HDR10_MASTERING_WHITE_POINT_X_HIGH ||
+ p_hdr10_mastering->white_point_y <
+ V4L2_HDR10_MASTERING_WHITE_POINT_Y_LOW ||
+ p_hdr10_mastering->white_point_y >
+ V4L2_HDR10_MASTERING_WHITE_POINT_Y_HIGH)
+ return -EINVAL;
+
+ if (p_hdr10_mastering->max_display_mastering_luminance <
+ V4L2_HDR10_MASTERING_MAX_LUMA_LOW ||
+ p_hdr10_mastering->max_display_mastering_luminance >
+ V4L2_HDR10_MASTERING_MAX_LUMA_HIGH ||
+ p_hdr10_mastering->min_display_mastering_luminance <
+ V4L2_HDR10_MASTERING_MIN_LUMA_LOW ||
+ p_hdr10_mastering->min_display_mastering_luminance >
+ V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
+ return -EINVAL;
+
+ if (p_hdr10_mastering->max_display_mastering_luminance ==
+ V4L2_HDR10_MASTERING_MAX_LUMA_LOW &&
+ p_hdr10_mastering->min_display_mastering_luminance ==
+ V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
+ return -EINVAL;
+
+ break;
+
case V4L2_CTRL_TYPE_AREA:
area = p;
if (!area->width || !area->height)
@@ -2826,6 +2887,12 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
break;
+ case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
+ elem_size = sizeof(struct v4l2_ctrl_hdr10_cll_info);
+ break;
+ case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
+ elem_size = sizeof(struct v4l2_ctrl_hdr10_mastering_display);
+ break;
case V4L2_CTRL_TYPE_AREA:
elem_size = sizeof(struct v4l2_area);
break;
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 167ca8c8424f..9c3ddbf3d099 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -54,6 +54,8 @@ struct video_device;
* @p_hevc_sps: Pointer to an HEVC sequence parameter set structure.
* @p_hevc_pps: Pointer to an HEVC picture parameter set structure.
* @p_hevc_slice_params: Pointer to an HEVC slice parameters structure.
+ * @p_hdr10_cll: Pointer to an HDR10 Content Light Level structure.
+ * @p_hdr10_mastering: Pointer to an HDR10 Mastering Display structure.
* @p_area: Pointer to an area.
* @p: Pointer to a compound value.
* @p_const: Pointer to a constant compound value.
@@ -78,6 +80,8 @@ union v4l2_ctrl_ptr {
struct v4l2_ctrl_hevc_sps *p_hevc_sps;
struct v4l2_ctrl_hevc_pps *p_hevc_pps;
struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
+ struct v4l2_ctrl_hdr10_cll_info *p_hdr10_cll;
+ struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
struct v4l2_area *p_area;
void *p;
const void *p_const;
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index a41039559193..349e86b18af7 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -1661,6 +1661,37 @@ struct v4l2_ctrl_fwht_params {
#define V4L2_CID_COLORIMETRY_CLASS_BASE (V4L2_CTRL_CLASS_COLORIMETRY | 0x900)
#define V4L2_CID_COLORIMETRY_CLASS (V4L2_CTRL_CLASS_COLORIMETRY | 1)

+#define V4L2_CID_COLORIMETRY_HDR10_CLL_INFO (V4L2_CID_COLORIMETRY_CLASS_BASE + 0)
+
+struct v4l2_ctrl_hdr10_cll_info {
+ __u16 max_content_light_level;
+ __u16 max_pic_average_light_level;
+};
+
+#define V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY (V4L2_CID_COLORIMETRY_CLASS_BASE + 1)
+
+#define V4L2_HDR10_MASTERING_PRIMARIES_X_LOW 5
+#define V4L2_HDR10_MASTERING_PRIMARIES_X_HIGH 37000
+#define V4L2_HDR10_MASTERING_PRIMARIES_Y_LOW 5
+#define V4L2_HDR10_MASTERING_PRIMARIES_Y_HIGH 42000
+#define V4L2_HDR10_MASTERING_WHITE_POINT_X_LOW 5
+#define V4L2_HDR10_MASTERING_WHITE_POINT_X_HIGH 37000
+#define V4L2_HDR10_MASTERING_WHITE_POINT_Y_LOW 5
+#define V4L2_HDR10_MASTERING_WHITE_POINT_Y_HIGH 42000
+#define V4L2_HDR10_MASTERING_MAX_LUMA_LOW 50000
+#define V4L2_HDR10_MASTERING_MAX_LUMA_HIGH 100000000
+#define V4L2_HDR10_MASTERING_MIN_LUMA_LOW 1
+#define V4L2_HDR10_MASTERING_MIN_LUMA_HIGH 50000
+
+struct v4l2_ctrl_hdr10_mastering_display {
+ __u16 display_primaries_x[3];
+ __u16 display_primaries_y[3];
+ __u16 white_point_x;
+ __u16 white_point_y;
+ __u32 max_display_mastering_luminance;
+ __u32 min_display_mastering_luminance;
+};
+
/* MPEG-compression definitions kept for backwards compatibility */
#ifndef __KERNEL__
#define V4L2_CTRL_CLASS_MPEG V4L2_CTRL_CLASS_CODEC
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 79dbde3bcf8d..f5f971407b66 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1784,6 +1784,9 @@ enum v4l2_ctrl_type {
V4L2_CTRL_TYPE_U32 = 0x0102,
V4L2_CTRL_TYPE_AREA = 0x0106,

+ V4L2_CTRL_TYPE_HDR10_CLL_INFO = 0x0110,
+ V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY = 0x0111,
+
V4L2_CTRL_TYPE_H264_SPS = 0x0200,
V4L2_CTRL_TYPE_H264_PPS = 0x0201,
V4L2_CTRL_TYPE_H264_SCALING_MATRIX = 0x0202,
--
2.25.1
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