diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2017-07-11 03:30:41 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-07-18 12:55:38 -0300 |
| commit | b8d62f50b1df2571afcf47107bbbe9cd60f8aafd (patch) | |
| tree | b4b95eddddecdcdc902b3bb64470b65e9b6044f4 /drivers/media/cec | |
| parent | fdb8c88e9213f9d87bbfe56724e20cfd9ff8ef9d (diff) | |
media: cec: add core support for low-level CEC pin monitoring
Add support for the new MONITOR_PIN mode.
Add the cec_pin_event function that the CEC pin code will call to queue pin
change events.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/cec')
| -rw-r--r-- | drivers/media/cec/cec-adap.c | 16 | ||||
| -rw-r--r-- | drivers/media/cec/cec-api.c | 15 |
2 files changed, 29 insertions, 2 deletions
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c index 5080d7aa6105..b0bd466f75e2 100644 --- a/drivers/media/cec/cec-adap.c +++ b/drivers/media/cec/cec-adap.c @@ -153,6 +153,22 @@ static void cec_queue_event(struct cec_adapter *adap, mutex_unlock(&adap->devnode.lock); } +/* Notify userspace that the CEC pin changed state at the given time. */ +void cec_queue_pin_event(struct cec_adapter *adap, bool is_high, ktime_t ts) +{ + struct cec_event ev = { + .event = is_high ? CEC_EVENT_PIN_HIGH : CEC_EVENT_PIN_LOW, + }; + struct cec_fh *fh; + + mutex_lock(&adap->devnode.lock); + list_for_each_entry(fh, &adap->devnode.fhs, list) + if (fh->mode_follower == CEC_MODE_MONITOR_PIN) + cec_queue_event_fh(fh, &ev, ktime_to_ns(ts)); + mutex_unlock(&adap->devnode.lock); +} +EXPORT_SYMBOL_GPL(cec_queue_pin_event); + /* * Queue a new message for this filehandle. * diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c index 48bef1c718ad..14279958dca1 100644 --- a/drivers/media/cec/cec-api.c +++ b/drivers/media/cec/cec-api.c @@ -370,6 +370,10 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, !(adap->capabilities & CEC_CAP_MONITOR_ALL)) return -EINVAL; + if (mode_follower == CEC_MODE_MONITOR_PIN && + !(adap->capabilities & CEC_CAP_MONITOR_PIN)) + return -EINVAL; + /* Follower modes should always be able to send CEC messages */ if ((mode_initiator == CEC_MODE_NO_INITIATOR || !(adap->capabilities & CEC_CAP_TRANSMIT)) && @@ -378,11 +382,11 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, return -EINVAL; /* Monitor modes require CEC_MODE_NO_INITIATOR */ - if (mode_initiator && mode_follower >= CEC_MODE_MONITOR) + if (mode_initiator && mode_follower >= CEC_MODE_MONITOR_PIN) return -EINVAL; /* Monitor modes require CAP_NET_ADMIN */ - if (mode_follower >= CEC_MODE_MONITOR && !capable(CAP_NET_ADMIN)) + if (mode_follower >= CEC_MODE_MONITOR_PIN && !capable(CAP_NET_ADMIN)) return -EPERM; mutex_lock(&adap->lock); @@ -421,8 +425,13 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, if (fh->mode_follower == CEC_MODE_FOLLOWER) adap->follower_cnt--; + if (fh->mode_follower == CEC_MODE_MONITOR_PIN) + adap->monitor_pin_cnt--; if (mode_follower == CEC_MODE_FOLLOWER) adap->follower_cnt++; + if (mode_follower == CEC_MODE_MONITOR_PIN) { + adap->monitor_pin_cnt++; + } if (mode_follower == CEC_MODE_EXCL_FOLLOWER || mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU) { adap->passthrough = @@ -566,6 +575,8 @@ static int cec_release(struct inode *inode, struct file *filp) } if (fh->mode_follower == CEC_MODE_FOLLOWER) adap->follower_cnt--; + if (fh->mode_follower == CEC_MODE_MONITOR_PIN) + adap->monitor_pin_cnt--; if (fh->mode_follower == CEC_MODE_MONITOR_ALL) cec_monitor_all_cnt_dec(adap); mutex_unlock(&adap->lock); |