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authorMauro Carvalho Chehab <m.chehab@samsung.com>2014-08-09 21:47:19 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-08-21 15:25:09 -0500
commit59d7889ae49f6e3e9d9cff8c0de7ad95d9ca068b (patch)
treeba67f1e8e6825e9f7108c5a8a55e380602fa97af
parent811872404bb021b73ecb4b78de88bd2d7f26548e (diff)
downloadop-kernel-dev-59d7889ae49f6e3e9d9cff8c0de7ad95d9ca068b.zip
op-kernel-dev-59d7889ae49f6e3e9d9cff8c0de7ad95d9ca068b.tar.gz
[media] dvb-frontend: add core support for tuner suspend/resume
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>
-rw-r--r--drivers/media/dvb-core/dvb_frontend.c8
-rw-r--r--drivers/media/dvb-core/dvb_frontend.h2
-rw-r--r--drivers/media/v4l2-core/tuner-core.c8
3 files changed, 14 insertions, 4 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index c2a6a0a..a581039 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -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;
diff --git a/drivers/media/dvb-core/dvb_frontend.h b/drivers/media/dvb-core/dvb_frontend.h
index d398de4..816269e 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -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);
diff --git a/drivers/media/v4l2-core/tuner-core.c b/drivers/media/v4l2-core/tuner-core.c
index 06c18ba..1770232 100644
--- a/drivers/media/v4l2-core/tuner-core.c
+++ b/drivers/media/v4l2-core/tuner-core.c
@@ -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);
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