From 2c2bc8ff97d5bde9f2d131d8728facba4a2190e2 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Thu, 28 May 2015 15:44:55 -0300 Subject: [PATCH] [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: Mauro Carvalho Chehab --- .../DocBook/media/dvb/frontend_legacy_api.xml | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/Documentation/DocBook/media/dvb/frontend_legacy_api.xml b/Documentation/DocBook/media/dvb/frontend_legacy_api.xml index e2817f830312..1eedc4ce0e4a 100644 --- a/Documentation/DocBook/media/dvb/frontend_legacy_api.xml +++ b/Documentation/DocBook/media/dvb/frontend_legacy_api.xml @@ -45,9 +45,19 @@ supported via the new FE_GET_PROPERTY/FE_GET_SET_PROPERTY ioctl's, using the DTV_DELIVERY_SYSTEM parameter. -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 DTV_ENUM_DELSYS instead. +In the old days, &dvb-frontend-info; used to contain + fe_type_t 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 + DTV_ENUM_DELSYS instead. + +On devices that support multiple delivery systems, + &dvb-frontend-info;::fe_type_t is filled with the + currently standard, as selected by the last call to + FE_SET_PROPERTY + using the &DTV-DELIVERY-SYSTEM; property. -- 2.20.1