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| author | Manu Abraham <manu@linuxtv.org> | 2008-02-04 02:37:02 +0400 |
|---|---|---|
| committer | Manu Abraham <manu@linuxtv.org> | 2008-02-04 02:37:02 +0400 |
| commit | a52af51ed4b377cab3886bb48864a036a2b0081c (patch) | |
| tree | 3d7694278c9d702253f0018beced2fa614251764 /linux/drivers/media/dvb/frontends/stb0899_algo.c | |
| parent | aff258c53f552369f3eed1508f809a808e368f1e (diff) | |
| download | mediapointer-dvb-s2-a52af51ed4b377cab3886bb48864a036a2b0081c.tar.gz mediapointer-dvb-s2-a52af51ed4b377cab3886bb48864a036a2b0081c.tar.bz2 | |
Optimization, Fix a Bug
* cut down some I/O operations by disabling "disable gate"
* budget_av was left with the gate open, thereby more susceptible
to RF interference due to I/O operations
From: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Diffstat (limited to 'linux/drivers/media/dvb/frontends/stb0899_algo.c')
| -rw-r--r-- | linux/drivers/media/dvb/frontends/stb0899_algo.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/linux/drivers/media/dvb/frontends/stb0899_algo.c b/linux/drivers/media/dvb/frontends/stb0899_algo.c index 355c73d5c..e144f3dc2 100644 --- a/linux/drivers/media/dvb/frontends/stb0899_algo.c +++ b/linux/drivers/media/dvb/frontends/stb0899_algo.c @@ -583,6 +583,9 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) internal->derot_freq = 0; internal->status = NOAGC1; + /* enable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 1); + /* Move tuner to frequency */ dprintk(state->verbose, FE_DEBUG, 1, "Tuner set frequency"); if (state->config->tuner_set_frequency) @@ -598,6 +601,10 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) /* There is signal in the band */ if (config->tuner_get_bandwidth) config->tuner_get_bandwidth(&state->frontend, &bandwidth); + + /* disable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 0); + if (params->srate <= bandwidth / 2) stb0899_search_tmg(state); /* For low rates (SCPC) */ else @@ -1338,12 +1345,18 @@ enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state) STB0899_SETFIELD_VAL(FRESRS, reg, 1); stb0899_write_reg(state, STB0899_TSTRES, reg); + /* enable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 1); + /* Move tuner to frequency */ if (state->config->tuner_set_frequency) state->config->tuner_set_frequency(&state->frontend, internal->freq); if (state->config->tuner_get_frequency) state->config->tuner_get_frequency(&state->frontend, &internal->freq); + /* disable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 0); + /* Set IF AGC to acquisition */ reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL); STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg, 4); |