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Commit 2c2bc8ff authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

[media] DocBook: add a proper description for dvb_frontend_info.fe_type 



The fe_type is deprecated at the DVB API. However, it may still
be used by legacy DVBv3 applications. While this works with old
devices, modern devices may support more than one delivery
system.

Add an explanation about that and a point to what should be
used, instead, in order for legacy apps to support newer hardware.

Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent be1ad6e7

Documentation/DocBook/media/dvb/frontend_legacy_api.xml

+13 −3
Original line number Diff line number Diff line
@@ -45,9 +45,19 @@ 
supported via the new <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY/FE_GET_SET_PROPERTY</link> ioctl's, using the <link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> parameter.

</para>



<para>The usage of this field is deprecated, as it doesn't report all supported standards, and

will provide an incomplete information for frontends that support multiple delivery systems.

Please use <link linkend="DTV-ENUM-DELSYS">DTV_ENUM_DELSYS</link> instead.</para>

<para>In the old days, &dvb-frontend-info; used to contain

    <constant>fe_type_t</constant> field to indicate the delivery systems,

    filled with either FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC. While this is

    still filled to keep backward compatibility, the usage of this

    field is deprecated, as it can report just one delivery system, but some

    devices support multiple delivery systems. Please use

    <link linkend="DTV-ENUM-DELSYS">DTV_ENUM_DELSYS</link> instead.

</para>

<para>On devices that support multiple delivery systems,

    &dvb-frontend-info;::<constant>fe_type_t</constant> is filled with the

    currently standard, as selected by the last call to

    <link linkend="FE_GET_PROPERTY">FE_SET_PROPERTY</link>

    using the &DTV-DELIVERY-SYSTEM; property.</para>

</section>