[linux-dvb] Re: [PATCH] dvb_bt8xx: sub_device

[Johannes Stezenbach <js@convergence.de>]

Markus Germeier wrote:
> 
> after some debugging of mplayer, dvbstream 0.5 and tzap I found a fix
> for the problem.
> 
> Adding the line
>        feparams->u.qam.modulation = 9;
> just before the FE_SET_FRONTEND ioctl fixes mplayer (and dvbstream)
> 
> No clue what I have done here, but it works for me(tm). ;-)

You're joker. You have a DVB-T frontend and set DVB-C
tuning paramters...

I guess u.qam.modulation = 9 will actually set
u.ofdm.code_rate_LP = FEC_AUTO.

The change which we made some time ago was to reject
u.ofdm.code_rate_LP = FE_NONE in the frontend drivers,
because the hardware does not handle it, and the
ETSI standards do not specify it.

OTOH, if my understanding is correct, code_rate_LP is
irrelevant when hierarchy_information = HIERARCHY_NONE.
We could make the frontend drivers more tolerant, but
I would rather have userspace programs fixed.

Johannes