From 0898b95409489abd7219f5f7ca675c84656fb94f Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Tue, 14 Aug 2012 22:21:05 -0300 Subject: [PATCH] [media] dvb_usb_v2: implement power-management for suspend Put device full sleep on suspend, wake-up it on resume and acquire retune in order to return same television channel. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/dvb-usb-v2/dvb_usb_core.c | 83 ++++++++++++++++++++++------- 1 file changed, 63 insertions(+), 20 deletions(-) diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c index a72f9c7..7ce8ffe 100644 --- a/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c +++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_core.c @@ -486,7 +486,6 @@ static int dvb_usb_fe_init(struct dvb_frontend *fe) int ret; struct dvb_usb_adapter *adap = fe->dvb->priv; struct dvb_usb_device *d = adap_to_d(adap); - mutex_lock(&adap->sync_mutex); dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id, fe->id); @@ -506,22 +505,30 @@ static int dvb_usb_fe_init(struct dvb_frontend *fe) goto err; } - adap->active_fe = fe->id; - mutex_unlock(&adap->sync_mutex); - return 0; err: - mutex_unlock(&adap->sync_mutex); dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret); return ret; } +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); + return ret; +} + static int dvb_usb_fe_sleep(struct dvb_frontend *fe) { int ret; struct dvb_usb_adapter *adap = fe->dvb->priv; struct dvb_usb_device *d = adap_to_d(adap); - mutex_lock(&adap->sync_mutex); dev_dbg(&d->udev->dev, "%s: adap=%d fe=%d\n", __func__, adap->id, fe->id); @@ -541,16 +548,25 @@ static int dvb_usb_fe_sleep(struct dvb_frontend *fe) if (ret < 0) goto err; - adap->active_fe = -1; - mutex_unlock(&adap->sync_mutex); - return 0; err: - mutex_unlock(&adap->sync_mutex); dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret); return ret; } +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); + return ret; +} + int dvb_usbv2_adapter_frontend_init(struct dvb_usb_adapter *adap) { int ret, i, count_registered = 0; @@ -578,9 +594,9 @@ 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; + adap->fe[i]->ops.init = dvb_usb_fe_init_lock; adap->fe_sleep[i] = adap->fe[i]->ops.sleep; - adap->fe[i]->ops.sleep = dvb_usb_fe_sleep; + adap->fe[i]->ops.sleep = dvb_usb_fe_sleep_lock; ret = dvb_register_frontend(&adap->dvb_adap, adap->fe[i]); if (ret < 0) { @@ -950,18 +966,30 @@ EXPORT_SYMBOL(dvb_usbv2_disconnect); int dvb_usbv2_suspend(struct usb_interface *intf, pm_message_t msg) { struct dvb_usb_device *d = usb_get_intfdata(intf); - int i; + int i, active_fe; + struct dvb_frontend *fe; dev_dbg(&d->udev->dev, "%s:\n", __func__); /* stop remote controller poll */ if (d->rc.query && !d->rc.bulk_mode) cancel_delayed_work_sync(&d->rc_query_work); - /* stop streaming */ for (i = MAX_NO_OF_ADAPTER_PER_DEVICE - 1; i >= 0; i--) { - if (d->adapter[i].dvb_adap.priv && - d->adapter[i].active_fe != -1) + active_fe = d->adapter[i].active_fe; + if (d->adapter[i].dvb_adap.priv && active_fe != -1) { + fe = d->adapter[i].fe[active_fe]; + + if (d->props->streaming_ctrl) + d->props->streaming_ctrl(fe, 0); + + /* 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); + } } return 0; @@ -971,14 +999,29 @@ EXPORT_SYMBOL(dvb_usbv2_suspend); int dvb_usbv2_resume(struct usb_interface *intf) { struct dvb_usb_device *d = usb_get_intfdata(intf); - int i; + int i, active_fe; + struct dvb_frontend *fe; dev_dbg(&d->udev->dev, "%s:\n", __func__); - /* start streaming */ for (i = 0; i < MAX_NO_OF_ADAPTER_PER_DEVICE; i++) { - if (d->adapter[i].dvb_adap.priv && - d->adapter[i].active_fe != -1) + active_fe = d->adapter[i].active_fe; + 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); + + /* resume usb streaming */ usb_urb_submitv2(&d->adapter[i].stream, NULL); + + if (d->props->streaming_ctrl) + d->props->streaming_ctrl(fe, 1); + } } /* start remote controller poll */ -- 2.7.4