diff options
Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-g-edid.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-g-edid.xml | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-edid.xml b/Documentation/DocBook/media/v4l/vidioc-g-edid.xml index 6df40db4c8ba..2702536bbc7c 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-edid.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-edid.xml @@ -7,6 +7,8 @@ <refnamediv> <refname>VIDIOC_G_EDID</refname> <refname>VIDIOC_S_EDID</refname> + <refname>VIDIOC_SUBDEV_G_EDID</refname> + <refname>VIDIOC_SUBDEV_S_EDID</refname> <refpurpose>Get or set the EDID of a video receiver/transmitter</refpurpose> </refnamediv> @@ -42,7 +44,7 @@ <varlistentry> <term><parameter>request</parameter></term> <listitem> - <para>VIDIOC_G_EDID, VIDIOC_S_EDID</para> + <para>VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID</para> </listitem> </varlistentry> <varlistentry> @@ -82,6 +84,13 @@ <para>If blocks have to be retrieved from the sink, then this call will block until they have been read.</para> + <para>If <structfield>start_block</structfield> and <structfield>blocks</structfield> are + both set to 0 when <constant>VIDIOC_G_EDID</constant> is called, then the driver will + set <structfield>blocks</structfield> to the total number of available EDID blocks + and it will return 0 without copying any data. This is an easy way to discover how many + EDID blocks there are. Note that if there are no EDID blocks available at all, then + the driver will set <structfield>blocks</structfield> to 0 and it returns 0.</para> + <para>To set the EDID blocks of a receiver the application has to fill in the <structfield>pad</structfield>, <structfield>blocks</structfield> and <structfield>edid</structfield> fields and set <structfield>start_block</structfield> to 0. It is not possible to set part of an EDID, |