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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-12-12 19:02:15 +0100 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-12-12 19:02:15 +0100 |
commit | 4b5d8da88e3fab76700e89488a8c65c54facb9a3 (patch) | |
tree | 2367a099981d9006426bbe8417d19936e3f292ae /drivers/media | |
parent | [media] s5p-fimc: Fix camera input configuration in subdev operations (diff) | |
download | linux-4b5d8da88e3fab76700e89488a8c65c54facb9a3.tar.xz linux-4b5d8da88e3fab76700e89488a8c65c54facb9a3.zip |
Revert "[media] af9015: limit I2C access to keep FW happy"
This reverts commit ff83bd82cb343d37b5ab8e402aaad9ef33d03f1e.
As requested by Antti:
From a talk with him at #linuxtv irc, he strong feeling that some apps
like MythTV will do a lot a lot of I2C I/O and now it adds locks,
with utimatelly means more delays. This could cause bad effects.
There is a new patch for 3.3 that re-writes af9013 in order to limit
I2C I/O. and thus those patches could be nice to have together
because those user who has has problems are most likely MythTV users.
So, let's revert this commit for now.
Requested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/dvb/dvb-usb/af9015.c | 97 | ||||
-rw-r--r-- | drivers/media/dvb/dvb-usb/af9015.h | 7 |
2 files changed, 0 insertions, 104 deletions
diff --git a/drivers/media/dvb/dvb-usb/af9015.c b/drivers/media/dvb/dvb-usb/af9015.c index 033aa8affd8e..c6c275bac08e 100644 --- a/drivers/media/dvb/dvb-usb/af9015.c +++ b/drivers/media/dvb/dvb-usb/af9015.c @@ -1093,80 +1093,9 @@ error: return ret; } -/* override demod callbacks for resource locking */ -static int af9015_af9013_set_frontend(struct dvb_frontend *fe, - struct dvb_frontend_parameters *params) -{ - int ret; - struct dvb_usb_adapter *adap = fe->dvb->priv; - struct af9015_state *priv = adap->dev->priv; - - if (mutex_lock_interruptible(&adap->dev->usb_mutex)) - return -EAGAIN; - - ret = priv->set_frontend[adap->id](fe, params); - - mutex_unlock(&adap->dev->usb_mutex); - - return ret; -} - -/* override demod callbacks for resource locking */ -static int af9015_af9013_read_status(struct dvb_frontend *fe, - fe_status_t *status) -{ - int ret; - struct dvb_usb_adapter *adap = fe->dvb->priv; - struct af9015_state *priv = adap->dev->priv; - - if (mutex_lock_interruptible(&adap->dev->usb_mutex)) - return -EAGAIN; - - ret = priv->read_status[adap->id](fe, status); - - mutex_unlock(&adap->dev->usb_mutex); - - return ret; -} - -/* override demod callbacks for resource locking */ -static int af9015_af9013_init(struct dvb_frontend *fe) -{ - int ret; - struct dvb_usb_adapter *adap = fe->dvb->priv; - struct af9015_state *priv = adap->dev->priv; - - if (mutex_lock_interruptible(&adap->dev->usb_mutex)) - return -EAGAIN; - - ret = priv->init[adap->id](fe); - - mutex_unlock(&adap->dev->usb_mutex); - - return ret; -} - -/* override demod callbacks for resource locking */ -static int af9015_af9013_sleep(struct dvb_frontend *fe) -{ - int ret; - struct dvb_usb_adapter *adap = fe->dvb->priv; - struct af9015_state *priv = adap->dev->priv; - - if (mutex_lock_interruptible(&adap->dev->usb_mutex)) - return -EAGAIN; - - ret = priv->init[adap->id](fe); - - mutex_unlock(&adap->dev->usb_mutex); - - return ret; -} - static int af9015_af9013_frontend_attach(struct dvb_usb_adapter *adap) { int ret; - struct af9015_state *state = adap->dev->priv; if (adap->id == 1) { /* copy firmware to 2nd demodulator */ @@ -1187,32 +1116,6 @@ static int af9015_af9013_frontend_attach(struct dvb_usb_adapter *adap) adap->fe_adap[0].fe = dvb_attach(af9013_attach, &af9015_af9013_config[adap->id], &adap->dev->i2c_adap); - /* - * AF9015 firmware does not like if it gets interrupted by I2C adapter - * request on some critical phases. During normal operation I2C adapter - * is used only 2nd demodulator and tuner on dual tuner devices. - * Override demodulator callbacks and use mutex for limit access to - * those "critical" paths to keep AF9015 happy. - * Note: we abuse unused usb_mutex here. - */ - if (adap->fe_adap[0].fe) { - state->set_frontend[adap->id] = - adap->fe_adap[0].fe->ops.set_frontend; - adap->fe_adap[0].fe->ops.set_frontend = - af9015_af9013_set_frontend; - - state->read_status[adap->id] = - adap->fe_adap[0].fe->ops.read_status; - adap->fe_adap[0].fe->ops.read_status = - af9015_af9013_read_status; - - state->init[adap->id] = adap->fe_adap[0].fe->ops.init; - adap->fe_adap[0].fe->ops.init = af9015_af9013_init; - - state->sleep[adap->id] = adap->fe_adap[0].fe->ops.sleep; - adap->fe_adap[0].fe->ops.sleep = af9015_af9013_sleep; - } - return adap->fe_adap[0].fe == NULL ? -ENODEV : 0; } diff --git a/drivers/media/dvb/dvb-usb/af9015.h b/drivers/media/dvb/dvb-usb/af9015.h index 4a126177e101..6252ea6c1904 100644 --- a/drivers/media/dvb/dvb-usb/af9015.h +++ b/drivers/media/dvb/dvb-usb/af9015.h @@ -102,13 +102,6 @@ struct af9015_state { u8 rc_repeat; u32 rc_keycode; u8 rc_last[4]; - - /* for demod callback override */ - int (*set_frontend[2]) (struct dvb_frontend *fe, - struct dvb_frontend_parameters *params); - int (*read_status[2]) (struct dvb_frontend *fe, fe_status_t *status); - int (*init[2]) (struct dvb_frontend *fe); - int (*sleep[2]) (struct dvb_frontend *fe); }; struct af9015_config { |