linux-kernel - [PATCH 2/3] docs: media: Document CLL and Mastering display

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Date:   Mon,  9 Nov 2020 19:31:52 +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:     Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH 2/3] docs: media: Document CLL and Mastering display

Document Content light level and Mastering display colour volume.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 .../media/v4l/ext-ctrls-codec.rst             | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index ce728c757eaf..39d0aab5ca3d 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -4382,3 +4382,64 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
       - Selecting this value specifies that HEVC slices are expected
         to be prefixed by Annex B start codes. According to :ref:`hevc`
         valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_CLL_INFO (struct)``
+    The Content Light Level defines upper bounds for the nominal target
+    brightness light level of the pictures.
+
+.. c:type:: v4l2_ctrl_hevc_cll_info
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hevc_cll_info
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u16
+      - ``max_content_light_level``
+      - An upper bound on the maximum light level among all individual
+        samples for the pictures of coded video sequence, cd/m2.
+    * - __u16
+      - ``max_pic_average_light_level``
+      - An upper bound on the maximum average light level among the
+        samples for any idividual picture of coded video sequence, cd/m2.
+
+``V4L2_CID_MPEG_VIDEO_HEVC_MASTERING_DISPLAY (struct)``
+    The mastering display defines the colour volume (the colour primaries,
+    white point and luminance range) of a display considered to be the
+    mastering display for current video content.
+
+.. c:type:: v4l2_ctrl_hevc_mastering_display
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ctrl_hevc_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 colour
+        primary component of the mastering display.
+    * - __u16
+      - ``display_primaries_y[3]``
+      - Specifies the normalized y chromaticity coordinate of the colour
+        primary component of the mastering display.
+    * - __u16
+      - ``white_point_x``
+      - Specifies the normalized x chromaticity coordinate of the white
+        point of the mastering display.
+    * - __u16
+      - ``white_point_y``
+      - Specifies the normalized y chromaticity coordinate of the white
+        point of the mastering display.
+    * - __u32
+      - ``max_luminance``
+      - Specifies the nominal maximum display luminance of the mastering
+        display.
+    * - __u32
+      - ``min_luminance``
+      - specifies the nominal minimum display luminance of the mastering
+        display.
-- 
2.17.1