Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-07 13:43:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[media] dvb_frontend: implement suspend / resume

Browse Source 
Move initial suspend / resume support from dvb_usb_v2 to dvb_frontend
as it is dvb general feature that could be used all dvb devices.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2012-08-14 22:21:06 -03:00 committed by Mauro Carvalho Chehab
parent 0898b95409
commit 06bae1227a
4 changed files with 66 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
drivers/media/dvb-core/dvb_frontend.c
View File

@ -307,15 +307,6 @@ void dvb_frontend_reinitialise(struct dvb_frontend *fe)
}
EXPORT_SYMBOL(dvb_frontend_reinitialise);
void dvb_frontend_retune(struct dvb_frontend *fe)
{
struct dvb_frontend_private *fepriv = fe->frontend_priv;
fepriv->state = FESTATE_RETUNE;
dvb_frontend_wakeup(fe);
}
EXPORT_SYMBOL(dvb_frontend_retune);
static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
{
int q2;
@ -2448,6 +2439,44 @@ static const struct file_operations dvb_frontend_fops = {
.llseek = noop_llseek,
};
int dvb_frontend_suspend(struct dvb_frontend *fe)
{
int ret = 0;
dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
fe->id);
if (fe->ops.tuner_ops.sleep)
ret = fe->ops.tuner_ops.sleep(fe);
if (fe->ops.sleep)
ret = fe->ops.sleep(fe);
return ret;
}
EXPORT_SYMBOL(dvb_frontend_suspend);
int dvb_frontend_resume(struct dvb_frontend *fe)
{
struct dvb_frontend_private *fepriv = fe->frontend_priv;
int ret = 0;
dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
fe->id);
if (fe->ops.init)
ret = fe->ops.init(fe);
if (fe->ops.tuner_ops.init)
ret = fe->ops.tuner_ops.init(fe);
fepriv->state = FESTATE_RETUNE;
dvb_frontend_wakeup(fe);
return ret;
}
EXPORT_SYMBOL(dvb_frontend_resume);
int dvb_register_frontend(struct dvb_adapter* dvb,
struct dvb_frontend* fe)
{

3
drivers/media/dvb-core/dvb_frontend.h
View File

@ -418,7 +418,8 @@ extern int dvb_unregister_frontend(struct dvb_frontend *fe);
extern void dvb_frontend_detach(struct dvb_frontend *fe);
extern void dvb_frontend_reinitialise(struct dvb_frontend *fe);
extern void dvb_frontend_retune(struct dvb_frontend *fe);
extern int dvb_frontend_suspend(struct dvb_frontend *fe);
extern int dvb_frontend_resume(struct dvb_frontend *fe);
extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);

3
drivers/media/usb/dvb-usb-v2/dvb_usb.h
View File

@ -295,6 +295,7 @@ struct usb_data_stream {
* @stream: adapter the usb data stream
* @id: index of this adapter (starting with 0)
* @ts_type: transport stream, input stream, type
* @suspend_resume_active: set when there is ongoing suspend / resume
* @pid_filtering: is hardware pid_filtering used or not
* @feed_count: current feed count
* @max_feed_count: maimum feed count device can handle
@ -312,6 +313,7 @@ struct dvb_usb_adapter {
struct usb_data_stream stream;
u8 id;
u8 ts_type;
bool suspend_resume_active;
bool pid_filtering;
u8 feed_count;
u8 max_feed_count;
@ -381,6 +383,7 @@ extern int dvb_usbv2_probe(struct usb_interface *,
extern void dvb_usbv2_disconnect(struct usb_interface *);
extern int dvb_usbv2_suspend(struct usb_interface *, pm_message_t);
extern int dvb_usbv2_resume(struct usb_interface *);
#define dvb_usbv2_reset_resume dvb_usbv2_resume
/* the generic read/write method for device control */
extern int dvb_usbv2_generic_rw(struct dvb_usb_device *, u8 *, u16, u8 *, u16);

66
drivers/media/usb/dvb-usb-v2/dvb_usb_core.c
View File

@ -489,6 +489,11 @@ static int dvb_usb_fe_init(struct dvb_frontend *fe)
dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
fe->id);
if (!adap->suspend_resume_active) {
adap->active_fe = fe->id;
mutex_lock(&adap->sync_mutex);
}
ret = dvb_usbv2_device_power_ctrl(d, 1);
if (ret < 0)
goto err;
@ -504,23 +509,11 @@ static int dvb_usb_fe_init(struct dvb_frontend *fe)
if (ret < 0)
goto err;
}
return 0;
err:
dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
if (!adap->suspend_resume_active)
mutex_unlock(&adap->sync_mutex);
static int dvb_usb_fe_init_lock(struct dvb_frontend *fe)
{
int ret;
struct dvb_usb_adapter *adap = fe->dvb->priv;
mutex_lock(&adap->sync_mutex);
ret = dvb_usb_fe_init(fe);
adap->active_fe = fe->id;
mutex_unlock(&adap->sync_mutex);
dev_dbg(&d->udev->dev, "%s: ret=%d\n", __func__, ret);
return ret;
}
@ -532,6 +525,9 @@ static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id,
fe->id);
if (!adap->suspend_resume_active)
mutex_lock(&adap->sync_mutex);
if (adap->fe_sleep[fe->id]) {
ret = adap->fe_sleep[fe->id](fe);
if (ret < 0)
@ -547,23 +543,13 @@ static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
ret = dvb_usbv2_device_power_ctrl(d, 0);
if (ret < 0)
goto err;
return 0;
err:
dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
if (!adap->suspend_resume_active) {
adap->active_fe = -1;
mutex_unlock(&adap->sync_mutex);
}
static int dvb_usb_fe_sleep_lock(struct dvb_frontend *fe)
{
int ret;
struct dvb_usb_adapter *adap = fe->dvb->priv;
mutex_lock(&adap->sync_mutex);
ret = dvb_usb_fe_sleep(fe);
adap->active_fe = -1;
mutex_unlock(&adap->sync_mutex);
dev_dbg(&d->udev->dev, "%s: ret=%d\n", __func__, ret);
return ret;
}
@ -594,9 +580,9 @@ int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap)
adap->fe[i]->id = i;
/* re-assign sleep and wakeup functions */
adap->fe_init[i] = adap->fe[i]->ops.init;
adap->fe[i]->ops.init = dvb_usb_fe_init_lock;
adap->fe[i]->ops.init = dvb_usb_fe_init;
adap->fe_sleep[i] = adap->fe[i]->ops.sleep;
adap->fe[i]->ops.sleep = dvb_usb_fe_sleep_lock;
adap->fe[i]->ops.sleep = dvb_usb_fe_sleep;
ret = dvb_register_frontend(&adap->dvb_adap, adap->fe[i]);
if (ret < 0) {
@ -978,6 +964,7 @@ int dvb_usbv2_suspend(struct usb_interface *intf, pm_message_t msg)
active_fe = d->adapter[i].active_fe;
if (d->adapter[i].dvb_adap.priv && active_fe != -1) {
fe = d->adapter[i].fe[active_fe];
d->adapter[i].suspend_resume_active = true;
if (d->props->streaming_ctrl)
d->props->streaming_ctrl(fe, 0);
@ -985,10 +972,7 @@ int dvb_usbv2_suspend(struct usb_interface *intf, pm_message_t msg)
/* stop usb streaming */
usb_urb_killv2(&d->adapter[i].stream);
if (fe->ops.tuner_ops.sleep)
fe->ops.tuner_ops.sleep(fe);
dvb_usb_fe_sleep(fe);
dvb_frontend_suspend(fe);
}
}
@ -1008,19 +992,15 @@ int dvb_usbv2_resume(struct usb_interface *intf)
if (d->adapter[i].dvb_adap.priv && active_fe != -1) {
fe = d->adapter[i].fe[active_fe];
dvb_usb_fe_init(fe);
if (fe->ops.tuner_ops.init)
fe->ops.tuner_ops.init(fe);
/* acquire dvb-core perform retune */
dvb_frontend_retune(fe);
dvb_frontend_resume(fe);
/* resume usb streaming */
usb_urb_submitv2(&d->adapter[i].stream, NULL);
if (d->props->streaming_ctrl)
d->props->streaming_ctrl(fe, 1);
d->adapter[i].suspend_resume_active = false;
}
}