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Date: Tue, 23 Mar 2021 15:40:39 +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: hverkuil-cisco@...all.nl, ezequiel@...labora.com,
nicolas.dufresne@...labora.com,
Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH v6 4/5] docs: Document CLL and Mastering display colorimetry controls
Document Content Light Level and Mastering Display v4l2 colorimetry
controls.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
Reviewed-by: Hans Verkuil <hverkuil-cisco@...all.nl>
---
.../media/v4l/ext-ctrls-colorimetry.rst | 71 +++++++++++++++++++
.../media/v4l/vidioc-g-ext-ctrls.rst | 8 +++
.../media/videodev2.h.rst.exceptions | 2 +
3 files changed, 81 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst
index 862f78b41b32..1e7265155715 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst
@@ -20,3 +20,74 @@ Colorimetry Control IDs
The Colorimetry class descriptor. Calling
:ref:`VIDIOC_QUERYCTRL` for this control will
return a description of this control class.
+
+``V4L2_CID_COLORIMETRY_HDR10_CLL_INFO (struct)``
+ The Content Light Level defines upper bounds for the nominal target
+ brightness light level of the pictures.
+
+.. c:type:: v4l2_ctrl_hdr10_cll_info
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hdr10_cll_info
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 2
+
+ * - __u16
+ - ``max_content_light_level``
+ - The upper bound for the maximum light level among all individual
+ samples for the pictures of a video sequence, cd/m\ :sup:`2`.
+ When equal to 0 no such upper bound is present.
+ * - __u16
+ - ``max_pic_average_light_level``
+ - The upper bound for the maximum average light level among the
+ samples for any individual picture of a video sequence,
+ cd/m\ :sup:`2`. When equal to 0 no such upper bound is present.
+
+``V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY (struct)``
+ The mastering display defines the color volume (the color primaries,
+ white point and luminance range) of a display considered to be the
+ mastering display for the current video content.
+
+.. c:type:: v4l2_ctrl_hdr10_mastering_display
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hdr10_mastering_display
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 2
+
+ * - __u16
+ - ``display_primaries_x[3]``
+ - Specifies the normalized x chromaticity coordinate of the color
+ primary component c of the mastering display in increments of 0.00002.
+ For describing the mastering display that uses Red, Green and Blue
+ color primaries, index value c equal to 0 corresponds to the Green
+ primary, c equal to 1 corresponds to Blue primary and c equal to 2
+ corresponds to the Red color primary.
+ * - __u16
+ - ``display_primaries_y[3]``
+ - Specifies the normalized y chromaticity coordinate of the color
+ primary component c of the mastering display in increments of 0.00002.
+ For describing the mastering display that uses Red, Green and Blue
+ color primaries, index value c equal to 0 corresponds to the Green
+ primary, c equal to 1 corresponds to Blue primary and c equal to 2
+ corresponds to Red color primary.
+ * - __u16
+ - ``white_point_x``
+ - Specifies the normalized x chromaticity coordinate of the white
+ point of the mastering display in increments of 0.00002.
+ * - __u16
+ - ``white_point_y``
+ - Specifies the normalized y chromaticity coordinate of the white
+ point of the mastering display in increments of 0.00002.
+ * - __u32
+ - ``max_luminance``
+ - Specifies the nominal maximum display luminance of the mastering
+ display in units of 0.0001 cd/m\ :sup:`2`.
+ * - __u32
+ - ``min_luminance``
+ - specifies the nominal minimum display luminance of the mastering
+ display in units of 0.0001 cd/m\ :sup:`2`.
diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
index 15291be55299..f8847abd2766 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
@@ -216,6 +216,14 @@ still cause this situation.
- ``p_fwht_params``
- A pointer to a struct :c:type:`v4l2_ctrl_fwht_params`. Valid if this control is
of type ``V4L2_CTRL_TYPE_FWHT_PARAMS``.
+ * - struct :c:type:`v4l2_ctrl_hdr10_cll_info` *
+ - ``p_hdr10_cll``
+ - A pointer to a struct :c:type:`v4l2_ctrl_hdr10_cll_info`. Valid if this control is
+ of type ``V4L2_CTRL_TYPE_HDR10_CLL_INFO``.
+ * - struct :c:type:`v4l2_ctrl_hdr10_mastering_display` *
+ - ``p_hdr10_mastering``
+ - A pointer to a struct :c:type:`v4l2_ctrl_hdr10_mastering_display`. Valid if this control is
+ of type ``V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY``.
* - void *
- ``ptr``
- A pointer to a compound type which can be an N-dimensional array
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index 0ed170c6e720..38b31a9b9580 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -147,6 +147,8 @@ replace symbol V4L2_CTRL_TYPE_HEVC_PPS :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_AREA :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_FWHT_PARAMS :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_HDR10_CLL_INFO :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY :c:type:`v4l2_ctrl_type`
# V4L2 capability defines
replace define V4L2_CAP_VIDEO_CAPTURE device-capabilities
--
2.25.1
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