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Subject[RFC 3/4] media: dvb_frontend: move algo-specific settings to a function
Date
As we're planning to call this code on a separate place, let's
fist move it to a different function.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
drivers/media/dvb-core/dvb_frontend.c | 90 +++++++++++++++------------
1 file changed, 49 insertions(+), 41 deletions(-)

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 06ea30a689d7..ed85dc2a9183 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -1790,6 +1790,54 @@ static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
return emulate_delivery_system(fe, delsys);
}

+static void prepare_tuning_algo_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct dvb_frontend_private *fepriv = fe->frontend_priv;
+ struct dvb_frontend_tune_settings fetunesettings;
+
+ /* get frontend-specific tuning settings */
+ memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
+ if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
+ fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
+ fepriv->max_drift = fetunesettings.max_drift;
+ fepriv->step_size = fetunesettings.step_size;
+ } else {
+ /* default values */
+ switch (c->delivery_system) {
+ case SYS_DVBS:
+ case SYS_DVBS2:
+ case SYS_ISDBS:
+ case SYS_TURBO:
+ case SYS_DVBC_ANNEX_A:
+ case SYS_DVBC_ANNEX_C:
+ fepriv->min_delay = HZ / 20;
+ fepriv->step_size = c->symbol_rate / 16000;
+ fepriv->max_drift = c->symbol_rate / 2000;
+ break;
+ case SYS_DVBT:
+ case SYS_DVBT2:
+ case SYS_ISDBT:
+ case SYS_DTMB:
+ fepriv->min_delay = HZ / 20;
+ fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2;
+ fepriv->max_drift = (dvb_frontend_get_stepsize(fe) * 2) + 1;
+ break;
+ default:
+ /*
+ * FIXME: This sounds wrong! if freqency_stepsize is
+ * defined by the frontend, why not use it???
+ */
+ fepriv->min_delay = HZ / 20;
+ fepriv->step_size = 0; /* no zigzag */
+ fepriv->max_drift = 0;
+ break;
+ }
+ }
+ if (dvb_override_tune_delay > 0)
+ fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
+}
+
/**
* dtv_property_process_set - Sets a single DTV property
* @fe: Pointer to &struct dvb_frontend
@@ -2182,7 +2230,6 @@ static int dtv_set_frontend(struct dvb_frontend *fe)
{
struct dvb_frontend_private *fepriv = fe->frontend_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
- struct dvb_frontend_tune_settings fetunesettings;
u32 rolloff = 0;

if (dvb_frontend_check_parameters(fe) < 0)
@@ -2260,46 +2307,7 @@ static int dtv_set_frontend(struct dvb_frontend *fe)
if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
c->code_rate_LP = FEC_AUTO;

- /* get frontend-specific tuning settings */
- memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
- if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
- fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
- fepriv->max_drift = fetunesettings.max_drift;
- fepriv->step_size = fetunesettings.step_size;
- } else {
- /* default values */
- switch (c->delivery_system) {
- case SYS_DVBS:
- case SYS_DVBS2:
- case SYS_ISDBS:
- case SYS_TURBO:
- case SYS_DVBC_ANNEX_A:
- case SYS_DVBC_ANNEX_C:
- fepriv->min_delay = HZ / 20;
- fepriv->step_size = c->symbol_rate / 16000;
- fepriv->max_drift = c->symbol_rate / 2000;
- break;
- case SYS_DVBT:
- case SYS_DVBT2:
- case SYS_ISDBT:
- case SYS_DTMB:
- fepriv->min_delay = HZ / 20;
- fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2;
- fepriv->max_drift = (dvb_frontend_get_stepsize(fe) * 2) + 1;
- break;
- default:
- /*
- * FIXME: This sounds wrong! if freqency_stepsize is
- * defined by the frontend, why not use it???
- */
- fepriv->min_delay = HZ / 20;
- fepriv->step_size = 0; /* no zigzag */
- fepriv->max_drift = 0;
- break;
- }
- }
- if (dvb_override_tune_delay > 0)
- fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
+ prepare_tuning_algo_parameters(fe);

fepriv->state = FESTATE_RETUNE;

--
2.26.2
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