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Commit 0be67c40 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
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[media] vidioc-g-edid.xml: be explicit about zeroing the reserved array 



The G/S_EDID documentation did not explicitly state that the reserved array
should be zeroed by the application.

Also add the missing VIDIOC_SUBDEV_G/S_EDID ioctl names to the header.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 72777724

Documentation/DocBook/media/v4l/vidioc-g-edid.xml

+6 −4
Original line number Diff line number Diff line 
<refentry id="vidioc-g-edid">

  <refmeta>

    <refentrytitle>ioctl VIDIOC_G_EDID, VIDIOC_S_EDID</refentrytitle>

    <refentrytitle>ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID</refentrytitle>

    &manvol;

  </refmeta>
@@ -71,7 +71,8 @@ 


    <para>To get the EDID data the application has to fill in the <structfield>pad</structfield>,

    <structfield>start_block</structfield>, <structfield>blocks</structfield> and <structfield>edid</structfield>

    fields and call <constant>VIDIOC_G_EDID</constant>. The current EDID from block

    fields, zero the <structfield>reserved</structfield> array and call

    <constant>VIDIOC_G_EDID</constant>. The current EDID from block

    <structfield>start_block</structfield> and of size <structfield>blocks</structfield>

    will be placed in the memory <structfield>edid</structfield> points to. The <structfield>edid</structfield>

    pointer must point to memory at least <structfield>blocks</structfield>&nbsp;*&nbsp;128 bytes
@@ -92,8 +93,9 @@ 
    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,

    <structfield>blocks</structfield> and <structfield>edid</structfield> fields, set

    <structfield>start_block</structfield> to 0 and zero the <structfield>reserved</structfield> array.

    It is not possible to set part of an EDID,

    it is always all or nothing. Setting the EDID data is only valid for receivers as it makes

    no sense for a transmitter.</para>