diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2017-11-05 07:36:36 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-12-08 11:10:00 -0500 |
| commit | 48ea2e926b5ad29c0747fbd90e605cc56fb78298 (patch) | |
| tree | 368c7d86ad1cf8640a99f31df7fd5970e14a5ee2 /drivers/media/cec/cec-api.c | |
| parent | cc05c0ba23bbc05d34caeb4773b89e1dfc2598b8 (diff) | |
media: cec: add the adap_monitor_pin_enable op
Some devices can monitor the CEC pin using an interrupt, but you
only want to enable the interrupt if you actually switch to pin
monitoring mode.
So add a new op that is called when pin monitoring needs to be
switched on or off.
Also fix a small bug where the initial CEC pin event was sent
again when calling S_MODE twice with the same CEC_MODE_MONITOR_PIN
mode.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/cec/cec-api.c')
| -rw-r--r-- | drivers/media/cec/cec-api.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c index 3dba3aa34a43..3eb4a069cde8 100644 --- a/drivers/media/cec/cec-api.c +++ b/drivers/media/cec/cec-api.c @@ -354,6 +354,7 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, u32 mode; u8 mode_initiator; u8 mode_follower; + bool send_pin_event = false; long err = 0; if (copy_from_user(&mode, parg, sizeof(mode))) @@ -433,6 +434,19 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, } } + if (!err) { + bool old_mon_pin = fh->mode_follower == CEC_MODE_MONITOR_PIN; + bool new_mon_pin = mode_follower == CEC_MODE_MONITOR_PIN; + + if (old_mon_pin != new_mon_pin) { + send_pin_event = new_mon_pin; + if (new_mon_pin) + err = cec_monitor_pin_cnt_inc(adap); + else + cec_monitor_pin_cnt_dec(adap); + } + } + if (err) { mutex_unlock(&adap->lock); return err; @@ -440,11 +454,9 @@ 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) { + if (send_pin_event) { struct cec_event ev = { .flags = CEC_EVENT_FL_INITIAL_STATE, }; @@ -452,7 +464,6 @@ static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh, ev.event = adap->cec_pin_is_high ? CEC_EVENT_PIN_CEC_HIGH : CEC_EVENT_PIN_CEC_LOW; cec_queue_event_fh(fh, &ev, 0); - adap->monitor_pin_cnt++; } if (mode_follower == CEC_MODE_EXCL_FOLLOWER || mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU) { @@ -608,7 +619,7 @@ 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--; + cec_monitor_pin_cnt_dec(adap); if (fh->mode_follower == CEC_MODE_MONITOR_ALL) cec_monitor_all_cnt_dec(adap); mutex_unlock(&adap->lock); |