[linux-dvb] Re: Frontend experimental patch v1

[Oliver Endriss <o.endriss@gmx.de>]

Hi,

now I tried your patch with my DVB-S (BSRU6, stv01299-based).
I'm using DiSEqC.

Basically it seems to work fine, never encountered a zigzag scan. :)
Tuning is somewhat slower, compared to my old reference driver
(CVS DVB from November, with zigzag scan removed).

Until now, I found that FE_SET_PARAMETERS is always called twice,
with fe->state==2 and fe->state==4. Is this intentional?

BTW, does someone know why the stv0299 FE_SET_FRONTEND code
does 
  /* A "normal" tune is requested */
  stv0299_writereg (i2c, 0x32, 0x80);
  stv0299_writereg (i2c, 0x22, 0x00);
  stv0299_writereg (i2c, 0x23, 0x00);
  stv0299_writereg (i2c, 0x32, 0x19);
  stv0299_set_symbolrate (i2c, p->u.qpsk.symbol_rate, state->tuner_type);
  stv0299_set_FEC (i2c, p->u.qpsk.fec_inner);
  pll_set_tv_freq (i2c, p->frequency, state->tuner_type, p->u.qpsk.symbol_rate);
* dvb_delay(50);
* stv0299_writereg (i2c, 0x22, 0x00);
* stv0299_writereg (i2c, 0x23, 0x00);
* pll_set_tv_freq (i2c, p->frequency, state->tuner_type, p->u.qpsk.symbol_rate);

The code looks somewhat strange to me. I don't understand why pll_set_tv_freq
should be be called twice. I disabled the lines marked with * and tuning was
faster.

Oliver


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