redonkable/alistair23-linux
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V4L/DVB (9457): Optimization, Fix a Bug

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* 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

Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Manu Abraham 2008-02-03 19:37:02 -03:00 committed by Mauro Carvalho Chehab
parent ed3d150eac
commit 40e8ce3dba
7 changed files with 37 additions and 29 deletions
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13
drivers/media/dvb/frontends/stb0899_algo.c
View file

@ -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
@ -1325,12 +1332,18 @@ 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);

22
drivers/media/dvb/frontends/stb0899_drv.c
View file

@ -1241,7 +1241,7 @@ static int stb0899_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
return 0;
}
static int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
int i2c_stat;
struct stb0899_state *state = fe->demodulator_priv;
@ -1255,10 +1255,15 @@ static int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
i2c_stat |= STB0899_I2CTON;
if (stb0899_write_reg(state, STB0899_I2CRPT, i2c_stat) < 0)
goto err;
} else {
dprintk(state->verbose, FE_DEBUG, 1, "Disabling I2C Repeater ...");
i2c_stat &= ~STB0899_I2CTON;
if (stb0899_write_reg(state, STB0899_I2CRPT, i2c_stat) < 0)
goto err;
}
return 0;
err:
dprintk(state->verbose, FE_ERROR, 1, "I2C Repeater enable failed");
dprintk(state->verbose, FE_ERROR, 1, "I2C Repeater control failed");
return -EREMOTEIO;
}
@ -1592,10 +1597,17 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa
internal->derot_percent = 30;
/* What to do for tuners having no bandwidth setup ? */
/* enable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 1);
if (state->config->tuner_set_bandwidth)
state->config->tuner_set_bandwidth(fe, (13 * (stb0899_carr_width(state) + SearchRange)) / 10);
if (state->config->tuner_get_bandwidth)
state->config->tuner_get_bandwidth(fe, &internal->tuner_bw);
/* disable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 0);
/* Set DVB-S1 AGC */
stb0899_write_reg(state, STB0899_AGCRFCFG, 0x11);
@ -1624,11 +1636,17 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa
internal->srate = i_params->srate;
internal->srch_range = SearchRange;
/* enable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 1);
if (state->config->tuner_set_bandwidth)
state->config->tuner_set_bandwidth(fe, (stb0899_carr_width(state) + SearchRange));
if (state->config->tuner_get_bandwidth)
state->config->tuner_get_bandwidth(fe, &internal->tuner_bw);
/* disable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 0);
// pParams->SpectralInv = pSearch->IQ_Inversion;
/* Set DVB-S2 AGC */

2
drivers/media/dvb/frontends/stb0899_priv.h
View file

@ -253,6 +253,8 @@ extern int stb0899_write_s2reg(struct stb0899_state *state,
u16 stb0899_reg_offset,
u32 stb0899_data);
extern int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable);
#define STB0899_READ_S2REG(DEVICE, REG) (_stb0899_read_s2reg(state, DEVICE, STB0899_BASE_##REG, STB0899_OFF0_##REG))
//#define STB0899_WRITE_S2REG(DEVICE, REG, DATA) (_stb0899_write_s2reg(state, DEVICE, STB0899_BASE_##REG, STB0899_OFF0_##REG, DATA))

17
drivers/media/dvb/frontends/stb6100.c
View file

@ -134,16 +134,7 @@ static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
.len = STB6100_NUMREGS
};
if (state->frontend->ops.i2c_gate_ctrl)
if ((rc = state->frontend->ops.i2c_gate_ctrl(state->frontend, 1)) < 0)
return rc;
rc = i2c_transfer(state->i2c, &msg, 1);
if (state->frontend->ops.i2c_gate_ctrl) {
int rc2;
if ((rc2 = state->frontend->ops.i2c_gate_ctrl(state->frontend, 0)) < 0)
return rc2;
}
if (unlikely(rc != 1)) {
dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
state->config->tuner_address, rc);
@ -200,15 +191,7 @@ static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int st
for (i = 0; i < len; i++)
dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
}
if (state->frontend->ops.i2c_gate_ctrl)
if ((rc = state->frontend->ops.i2c_gate_ctrl(state->frontend, 1)) < 0)
return rc;
rc = i2c_transfer(state->i2c, &msg, 1);
if (state->frontend->ops.i2c_gate_ctrl) {
int rc2;
if ((rc2 = state->frontend->ops.i2c_gate_ctrl(state->frontend, 0)) < 0)
return rc2;
}
if (unlikely(rc != 1)) {
dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
(unsigned int)state->config->tuner_address, start, len, rc);

8
drivers/media/dvb/frontends/tda8261.c
View file

@ -37,14 +37,10 @@ struct tda8261_state {
static int tda8261_read(struct tda8261_state *state, u8 *buf)
{
struct dvb_frontend *fe = state->fe;
const struct tda8261_config *config = state->config;
int err = 0;
struct i2c_msg msg = { .addr = config->addr, .flags = I2C_M_RD,.buf = buf, .len = 2 };
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1)
printk("%s: read error, err=%d\n", __func__, err);
@ -53,14 +49,10 @@ static int tda8261_read(struct tda8261_state *state, u8 *buf)
static int tda8261_write(struct tda8261_state *state, u8 *buf)
{
struct dvb_frontend *fe = state->fe;
const struct tda8261_config *config = state->config;
int err = 0;
struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = 4 };
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1)
printk("%s: write error, err=%d\n", __func__, err);

2
drivers/media/dvb/ttpci/budget-av.c
View file

@ -919,7 +919,7 @@ static const struct stb0899_s1_reg knc1_stb0899_s1_init_1[] = {
{ STB0899_IRQMSK_0 , 0xff },
{ STB0899_IRQCFG , 0x00 },
{ STB0899_I2CCFG , 0x88 },
{ STB0899_I2CRPT , 0x5c },
{ STB0899_I2CRPT , 0x58 }, /* Repeater=8, Stop=disabled */
{ STB0899_IOPVALUE5 , 0x00 },
{ STB0899_IOPVALUE4 , 0x20 },
{ STB0899_IOPVALUE3 , 0xc9 },

2
drivers/media/dvb/ttpci/budget-ci.c
View file

@ -1108,7 +1108,7 @@ static const struct stb0899_s1_reg tt3200_stb0899_s1_init_1[] = {
{ STB0899_IRQMSK_0 , 0xff },
{ STB0899_IRQCFG , 0x00 },
{ STB0899_I2CCFG , 0x88 },
{ STB0899_I2CRPT , 0x48 }, /* 12k Pullup */
{ STB0899_I2CRPT , 0x48 }, /* 12k Pullup, Repeater=16, Stop=disabled */
{ STB0899_IOPVALUE5 , 0x00 },
{ STB0899_IOPVALUE4 , 0x20 },
{ STB0899_IOPVALUE3 , 0xc9 },