[linux-dvb] Re: [PATCH] FusionHDTV 5 Gold digital TV works

Mac Michaels wmichaels1 at earthlink.net
Sun Aug 7 23:17:45 CEST 2005


That is what I am looking for.

I'll work up the idea and post patches to the lists.

-- Mac

On Saturday 06 August 2005 07:22 pm, Mauro Carvalho Chehab 
wrote:
> Mac,
>
> 	There's a tuner mode provided by tuner.h and
> tuner-core.h called T_STANDBY. Currenlly, this is used
> when the tuner has no support for that mode. It can be
> easilly implemented on tda9887.c (in doubt, please take a
> look at tea5767.c). I think it would also se easy to 
> provide a clean way to call it via ioctl.
>
> This is one example of its usage (from tuner-core.c):
>
> static inline int set_mode(struct i2c_client *client,
> struct tuner *t, int mode,
> char *cmd)
> {
>         if (mode != t->mode) {
>
>                 t->mode = mode;
>                 if (check_mode(t, cmd) == EINVAL) {
>                         t->mode = T_STANDBY;
>                         if (V4L2_TUNER_RADIO == mode) {
>                                 set_tv_freq(client, 400 *
> 16); } else {
>                                 set_radio_freq(client,
> 87.5 * 16000); }
>                         return EINVAL;
>                 }
>         }
>         return 0;
> }
>
> Em Sáb, 2005-08-06 às 17:56 -0500, Mac Michaels escreveu:
> > Attached are patches for video4linux CSV and dvb CVS
> > that together enable DTV for the DViCO FusionHDTV 5
> > Gold card.
> >
> > Tested:
> > 	Analog TV
> > 	8-VSB
> >
> > Not Tested:
> > 	QAM64
> > 	QAM256
> >
> > Known Bugs:
> > 	When switching to digital TV reception the analog
> > audio is not muted. When tuning to a digital signal
> > this produces an annoying sound on the analog audio
> > channel. A work around is to mute the analog input with
> > a mixer.
> >
> > I know what causes this and how to mute the signal. I
> > think the best solution is to add a mute function to
> > the tda9887 device. I have not yet figured out how to
> > get a handle for the tda9887 device from the code in
> > cx88-dvb.c.
> >
> > There is a hack in the code that is #ifdef'd out by
> > MUTE_TDA9887. It is a really a hack.
> >
> > -- Mac
> >
> > --
> > video4linux-list mailing list
> > Unsubscribe
> > mailto:video4linux-list-request at redhat.com?subject=unsu
> >bscribe
> > https://www.redhat.com/mailman/listinfo/video4linux-lis
> >t
>
> Cheers, Mauro.
>
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