Em 21-11-2011 19:06, Manu Abraham escreveu:
> With any tuner that can tune to multiple delivery systems/standards, it does
> query fe->ops.info.type to determine frontend type and set the delivery
> system type. fe->ops.info.type can handle only 4 delivery systems, viz FE_QPSK,
> FE_QAM, FE_OFDM and FE_ATSC.
>
> The change allows the tuner to be set to any delivery system specified in
> fe_delivery_system_t and any modulation as specified in fe_modulation_t,
> thereby simplification of issues.
>
> Signed-off-by: Manu Abraham <abraham.manu@xxxxxxxxx>
> ---
> drivers/media/dvb/dvb-core/dvb_frontend.h | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.h b/drivers/media/dvb/dvb-core/dvb_frontend.h
> index 67bbfa7..ec6e8e9 100644
> --- a/drivers/media/dvb/dvb-core/dvb_frontend.h
> +++ b/drivers/media/dvb/dvb-core/dvb_frontend.h
> @@ -113,6 +113,8 @@ enum tuner_param {
> DVBFE_TUNER_BANDWIDTH = (1 << 3),
> DVBFE_TUNER_REFCLOCK = (1 << 4),
> DVBFE_TUNER_IQSENSE = (1 << 5),
> + DVBFE_TUNER_DELSYS = (1 << 6),
> + DVBFE_TUNER_MODULATION = (1 << 7),
> DVBFE_TUNER_DUMMY = (1 << 31)
> };
>
> @@ -149,6 +151,8 @@ enum dvbfe_algo {
> };
>
> struct tuner_state {
> + fe_delivery_system_t delsys;
> + fe_modulation_t modulation;
> u32 frequency;
> u32 tunerstep;
> u32 ifreq;
Not sure about this patch.
Currently, tuners with newer standards just don't use the dvb_frontend_parameters
passed into them, using instead fe->dtv_property_cache.
So, in the long term, it seems to make more sense to just change the
set_parameters callback parameters from:
static int set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params)
to:
static int set_params(struct dvb_frontend *fe)
or to explicitly pass the cache as an argument.
Regards,
Mauro.
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