diff options
| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2006-08-06 17:03:50 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2006-09-26 11:53:51 -0300 |
| commit | d93f8860cc55504b376b38b95d22efeb3cc10edd (patch) | |
| tree | 0e159ad8062ae6c5cc5fe4d8a8310f52324c4fe1 /drivers/media | |
| parent | 8a36ecf0f4c0861330cc9e69885b0502fedac14a (diff) | |
V4L/DVB (4477): Improve hardware algorithm by setting the appropriate registers
Hardware algorithm needs to be configured to:
1) Increase timeout constants, to detect weaker signals;
2) do a wider zigzag search.
Acked-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb/frontends/cx24123.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c index 6fd44a125b1..f77b2d59955 100644 --- a/drivers/media/dvb/frontends/cx24123.c +++ b/drivers/media/dvb/frontends/cx24123.c @@ -191,7 +191,7 @@ static struct { {0x06, 0x31}, /* MPEG (default) */ {0x0b, 0x00}, /* Freq search start point (default) */ {0x0c, 0x00}, /* Demodulator sample gain (default) */ - {0x0d, 0x02}, /* Frequency search range = Fsymbol / 4 (default) */ + {0x0d, 0x7f}, /* Force driver to shift until the maximum (+-10 MHz) */ {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */ {0x0f, 0xfe}, /* FEC search mask (all supported codes) */ {0x10, 0x01}, /* Default search inversion, no repeat (default) */ @@ -222,6 +222,7 @@ static struct { {0x46, 0x0d}, /* Symbol rate estimator on (default) */ {0x56, 0xc1}, /* Error Counter = Viterbi BER */ {0x57, 0xff}, /* Error Counter Window (default) */ + {0x5c, 0x20}, /* Acquisition AFC Expiration window (default is 0x10) */ {0x67, 0x83}, /* Non-DCII symbol clock */ }; @@ -779,13 +780,15 @@ static int cx24123_read_status(struct dvb_frontend* fe, fe_status_t* status) if (lock & 0x01) *status |= FE_HAS_SIGNAL; if (sync & 0x02) - *status |= FE_HAS_CARRIER; + *status |= FE_HAS_CARRIER; /* Phase locked */ if (sync & 0x04) *status |= FE_HAS_VITERBI; + + /* Reed-Solomon Status */ if (sync & 0x08) *status |= FE_HAS_SYNC; if (sync & 0x80) - *status |= FE_HAS_LOCK; + *status |= FE_HAS_LOCK; /*Full Sync */ return 0; } @@ -812,6 +815,7 @@ static int cx24123_read_ber(struct dvb_frontend* fe, u32* ber) static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength) { struct cx24123_state *state = fe->demodulator_priv; + *signal_strength = cx24123_readreg(state, 0x3b) << 8; /* larger = better */ dprintk("%s: Signal strength = %d\n",__FUNCTION__,*signal_strength); |