diff options
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_frontend.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index ce1de403e99..7e9cd792131 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -993,6 +993,42 @@ int is_legacy_delivery_system(fe_delivery_system_t s) return 0; } +/* 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. + */ +void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + c->frequency = p->frequency; + c->inversion = p->inversion; + + switch (fe->ops.info.type) { + case FE_QPSK: + c->symbol_rate = p->u.qpsk.symbol_rate; + c->fec_inner = p->u.qpsk.fec_inner; + 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; + break; + case FE_OFDM: + c->bandwidth = p->u.ofdm.bandwidth; + c->code_rate_HP = p->u.ofdm.code_rate_HP; + c->code_rate_LP = p->u.ofdm.code_rate_LP; + c->modulation = p->u.ofdm.constellation; + c->transmission_mode = p->u.ofdm.transmission_mode; + c->guard_interval = p->u.ofdm.guard_interval; + c->hierarchy = p->u.ofdm.hierarchy_information; + break; + case FE_ATSC: + c->modulation = p->u.vsb.modulation; + break; + } +} + int dtv_property_cache_submit(struct dvb_frontend *fe) { @@ -1548,6 +1584,8 @@ static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file, case FE_SET_FRONTEND: { struct dvb_frontend_tune_settings fetunesettings; + dtv_property_cache_sync(fe, &fepriv->parameters); + if(fe->dtv_property_cache.state == DTV_TUNE) { if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) { err = -EINVAL; |