Commit 74d50724 authored by Michael Krufky's avatar Michael Krufky Committed by Mauro Carvalho Chehab

V4L/DVB (8044): au8522: tuning optimizations

If the current modulation and frequency is already set to
the desired parameters, then don't re-tune.

Don't store current frequency until after we've tuned successfully.

Force a re-tune after resume from standby.
Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 104fe9a2
......@@ -463,10 +463,13 @@ static int au8522_set_frontend(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct au8522_state *state = fe->demodulator_priv;
int ret = -EINVAL;
dprintk("%s(frequency=%d)\n", __func__, p->frequency);
state->current_frequency = p->frequency;
if ((state->current_frequency == p->frequency) &&
(state->current_modulation == p->u.vsb.modulation))
return 0;
au8522_enable_modulation(fe, p->u.vsb.modulation);
......@@ -476,11 +479,16 @@ static int au8522_set_frontend(struct dvb_frontend *fe,
if (fe->ops.tuner_ops.set_params) {
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
fe->ops.tuner_ops.set_params(fe, p);
ret = fe->ops.tuner_ops.set_params(fe, p);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
if (ret < 0)
return ret;
state->current_frequency = p->frequency;
return 0;
}
......@@ -498,6 +506,16 @@ static int au8522_init(struct dvb_frontend *fe)
return 0;
}
static int au8522_sleep(struct dvb_frontend *fe)
{
struct au8522_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
state->current_frequency = 0;
return 0;
}
static int au8522_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct au8522_state *state = fe->demodulator_priv;
......@@ -672,6 +690,7 @@ static struct dvb_frontend_ops au8522_ops = {
},
.init = au8522_init,
.sleep = au8522_sleep,
.i2c_gate_ctrl = au8522_i2c_gate_ctrl,
.set_frontend = au8522_set_frontend,
.get_frontend = au8522_get_frontend,
......
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