diff options
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_frontend.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index d218fe2fd061..a716627ab32f 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -1019,6 +1019,29 @@ static int is_legacy_delivery_system(fe_delivery_system_t s) return 0; } +/* Initialize the cache with some default values derived from the + * legacy frontend_info structure. + */ +static void dtv_property_cache_init(struct dvb_frontend *fe, + struct dtv_frontend_properties *c) +{ + switch (fe->ops.info.type) { + case FE_QPSK: + c->modulation = QPSK; /* implied for DVB-S in legacy API */ + c->rolloff = ROLLOFF_35;/* implied for DVB-S */ + c->delivery_system = SYS_DVBS; + break; + case FE_QAM: + c->delivery_system = SYS_DVBC_ANNEX_AC; + break; + case FE_OFDM: + c->delivery_system = SYS_DVBT; + break; + case FE_ATSC: + break; + } +} + /* Synchronise the legacy tuning parameters into the cache, so that demodulator * drivers can use a single set_frontend tuning function, regardless of whether * it's being used for the legacy or new API, reducing code and complexity. @@ -1032,17 +1055,13 @@ static void dtv_property_cache_sync(struct dvb_frontend *fe, switch (fe->ops.info.type) { case FE_QPSK: - c->modulation = QPSK; /* implied for DVB-S in legacy API */ - c->rolloff = ROLLOFF_35;/* implied for DVB-S */ c->symbol_rate = p->u.qpsk.symbol_rate; c->fec_inner = p->u.qpsk.fec_inner; - c->delivery_system = SYS_DVBS; break; case FE_QAM: c->symbol_rate = p->u.qam.symbol_rate; c->fec_inner = p->u.qam.fec_inner; c->modulation = p->u.qam.modulation; - c->delivery_system = SYS_DVBC_ANNEX_AC; break; case FE_OFDM: if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ) @@ -1060,7 +1079,6 @@ static void dtv_property_cache_sync(struct dvb_frontend *fe, c->transmission_mode = p->u.ofdm.transmission_mode; c->guard_interval = p->u.ofdm.guard_interval; c->hierarchy = p->u.ofdm.hierarchy_information; - c->delivery_system = SYS_DVBT; break; case FE_ATSC: c->modulation = p->u.vsb.modulation; @@ -1821,6 +1839,7 @@ static int dvb_frontend_ioctl_legacy(struct file *file, memcpy (&fepriv->parameters_in, parg, sizeof (struct dvb_frontend_parameters)); + dtv_property_cache_init(fe, c); dtv_property_cache_sync(fe, c, &fepriv->parameters_in); } |