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[media] dvb-frontend: add core support for tuner suspend/resume

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While several tuners have some sort of suspend/resume
implementation, this is currently mangled with an optional
.sleep callback that it is also used to put the device on
low power mode.

Not all drivers implement it, as returning the driver from
low power may require to re-load the firmware, with takes
some time. Also, some drivers may delay it.

So, the more coherent is to add two new optional callbacks
that will let the tuners to directy implement suspend and
resume callbacks if they need.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2014-08-09 21:47:19 -03:00
parent 811872404b
commit 59d7889ae4
3 changed files with 14 additions and 4 deletions
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8
drivers/media/dvb-core/dvb_frontend.c
View file

@ -2550,7 +2550,9 @@ int dvb_frontend_suspend(struct dvb_frontend *fe)
dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
fe->id);
if (fe->ops.tuner_ops.sleep)
if (fe->ops.tuner_ops.suspend)
ret = fe->ops.tuner_ops.suspend(fe);
else if (fe->ops.tuner_ops.sleep)
ret = fe->ops.tuner_ops.sleep(fe);
if (fe->ops.sleep)
@ -2572,7 +2574,9 @@ int dvb_frontend_resume(struct dvb_frontend *fe)
if (fe->ops.init)
ret = fe->ops.init(fe);
if (fe->ops.tuner_ops.init)
if (fe->ops.tuner_ops.resume)
ret = fe->ops.tuner_ops.resume(fe);
else if (fe->ops.tuner_ops.init)
ret = fe->ops.tuner_ops.init(fe);
fe->exit = DVB_FE_NO_EXIT;

2
drivers/media/dvb-core/dvb_frontend.h
View file

@ -201,6 +201,8 @@ struct dvb_tuner_ops {
int (*release)(struct dvb_frontend *fe);
int (*init)(struct dvb_frontend *fe);
int (*sleep)(struct dvb_frontend *fe);
int (*suspend)(struct dvb_frontend *fe);
int (*resume)(struct dvb_frontend *fe);
/** This is for simple PLLs - set all parameters in one go. */
int (*set_params)(struct dvb_frontend *fe);

8
drivers/media/v4l2-core/tuner-core.c
View file

@ -1260,7 +1260,9 @@ static int tuner_suspend(struct device *dev)
tuner_dbg("suspend\n");
if (!t->standby && analog_ops->standby)
if (t->fe.ops.tuner_ops.suspend)
t->fe.ops.tuner_ops.suspend(&t->fe);
else if (!t->standby && analog_ops->standby)
analog_ops->standby(&t->fe);
return 0;
@ -1273,7 +1275,9 @@ static int tuner_resume(struct device *dev)
tuner_dbg("resume\n");
if (!t->standby)
if (t->fe.ops.tuner_ops.resume)
t->fe.ops.tuner_ops.resume(&t->fe);
else if (!t->standby)
if (set_mode(t, t->mode) == 0)
set_freq(t, 0);