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[media] mb86a20s: Always reset the frontend with set_frontend

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Always init the frontend when set_frontend is called. The rationale
is: it was noticed that, on some devices, it fails to lock with a
different channel. It seems that some other registers need to be
restored to its initial state, when the channel changes.
As it is better to reset everything, even wasting a few more
miliseconds than to loose channel lock, let's change the logic
to always reset.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2013-03-02 13:45:31 -03:00
parent 17e67d4c7f
commit a78b41d5fd
1 changed files with 7 additions and 12 deletions
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17
drivers/media/dvb-frontends/mb86a20s.c
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@ -1854,18 +1854,9 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe)
fe->ops.i2c_gate_ctrl(fe, 1);
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.tuner_ops.get_if_frequency) {
if (fe->ops.tuner_ops.get_if_frequency)
fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
/*
* If the IF frequency changed, re-initialize the
* frontend. This is needed by some drivers like tda18271,
* that only sets the IF after receiving a set_params() call
*/
if (if_freq != state->if_freq)
state->need_init = true;
}
/*
* Make it more reliable: if, for some reason, the initial
* device initialization doesn't happen, initialize it when
@ -1877,8 +1868,12 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe)
* So, this hack is needed, in order to make Kworld SBTVD to work.
*
* It is also needed to change the IF after the initial init.
*
* HACK: Always init the frontend when set_frontend is called:
* it was noticed that, on some devices, it fails to lock on a
* different channel. So, it is better to reset everything, even
* wasting some time, than to loose channel lock.
*/
if (state->need_init)
mb86a20s_initfe(fe);
if (fe->ops.i2c_gate_ctrl)