On 17/06/2020 20:52, Mauro Carvalho Chehab wrote:
> As we're planning to call this code on a separate place, let's
s/on/from/
Suggest: "to call this code from somewhere else"
> fist move it to a different function.
s/fist/first
Suggest: "first move it to its own function"
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
> ---
> 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;
Suggest: fetunesettings = { 0 };
then we can remove the memset() below.
> +
> + /* 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;
As an aside, I find it confusing that there are 3 sources for the stepsize.
1) fe->ops.get_tune_settings().step_size
2) fe->ops.info.frequency_stepsize_hz
3) fe->ops.tuner_ops.info.frequency_step_hz
> - 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);
LGTM
Reviewed-by: Marc Gonzalez <marc.w.gonzalez@xxxxxxx>
