@@ -1580,24 +1580,24 @@ void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
/* Disabling monitor all mode should always succeed */
if (adap->monitor_all_cnt)
WARN_ON(call_op(adap, adap_monitor_all_enable, false));
- /* serialize adap_enable */
- mutex_lock(&adap->devnode.lock);
- if (adap->needs_hpd || list_empty(&adap->devnode.fhs)) {
+ if (adap->needs_hpd) {
+ /* serialize adap_enable */
+ mutex_lock(&adap->devnode.lock);
WARN_ON(adap->ops->adap_enable(adap, false));
adap->transmit_in_progress = false;
wake_up_interruptible(&adap->kthread_waitq);
+ mutex_unlock(&adap->devnode.lock);
}
- mutex_unlock(&adap->devnode.lock);
if (phys_addr == CEC_PHYS_ADDR_INVALID)
return;
}
/* serialize adap_enable */
mutex_lock(&adap->devnode.lock);
- adap->last_initiator = 0xff;
- adap->transmit_in_progress = false;
- if (adap->needs_hpd || list_empty(&adap->devnode.fhs)) {
+ if (adap->needs_hpd) {
+ adap->last_initiator = 0xff;
+ adap->transmit_in_progress = false;
if (adap->ops->adap_enable(adap, true)) {
mutex_unlock(&adap->devnode.lock);
return;
@@ -1606,8 +1606,10 @@ void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
if (adap->monitor_all_cnt &&
call_op(adap, adap_monitor_all_enable, true)) {
- if (adap->needs_hpd || list_empty(&adap->devnode.fhs))
+ if (adap->needs_hpd) {
WARN_ON(adap->ops->adap_enable(adap, false));
+ adap->transmit_in_progress = false;
+ }
mutex_unlock(&adap->devnode.lock);
return;
}
@@ -1683,6 +1685,13 @@ int __cec_s_log_addrs(struct cec_adapter *adap,
adap->log_addrs.osd_name[0] = '\0';
adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
+ if (!adap->needs_hpd) {
+ /* serialize adap_enable */
+ mutex_lock(&adap->devnode.lock);
+ WARN_ON(adap->ops->adap_enable(adap, false));
+ adap->transmit_in_progress = false;
+ mutex_unlock(&adap->devnode.lock);
+ }
return 0;
}
@@ -1816,6 +1825,19 @@ int __cec_s_log_addrs(struct cec_adapter *adap,
sizeof(log_addrs->features[i]));
}
+ if (!adap->needs_hpd) {
+ int ret;
+
+ /* serialize adap_enable */
+ mutex_lock(&adap->devnode.lock);
+ adap->last_initiator = 0xff;
+ adap->transmit_in_progress = false;
+ ret = adap->ops->adap_enable(adap, true);
+ mutex_unlock(&adap->devnode.lock);
+
+ if (ret)
+ return ret;
+ }
log_addrs->log_addr_mask = adap->log_addrs.log_addr_mask;
adap->log_addrs = *log_addrs;
if (adap->phys_addr != CEC_PHYS_ADDR_INVALID)
@@ -586,18 +586,6 @@ static int cec_open(struct inode *inode, struct file *filp)
return err;
}
- /* serialize adap_enable */
- mutex_lock(&devnode->lock);
- if (list_empty(&devnode->fhs) &&
- !adap->needs_hpd &&
- adap->phys_addr == CEC_PHYS_ADDR_INVALID) {
- err = adap->ops->adap_enable(adap, true);
- if (err) {
- mutex_unlock(&devnode->lock);
- kfree(fh);
- return err;
- }
- }
filp->private_data = fh;
/* Queue up initial state events */
@@ -625,6 +613,7 @@ static int cec_open(struct inode *inode, struct file *filp)
}
#endif
+ mutex_lock(&devnode->lock);
mutex_lock(&devnode->lock_fhs);
list_add(&fh->list, &devnode->fhs);
mutex_unlock(&devnode->lock_fhs);
@@ -656,15 +645,10 @@ static int cec_release(struct inode *inode, struct file *filp)
cec_monitor_all_cnt_dec(adap);
mutex_unlock(&adap->lock);
- /* serialize adap_enable */
mutex_lock(&devnode->lock);
mutex_lock(&devnode->lock_fhs);
list_del(&fh->list);
mutex_unlock(&devnode->lock_fhs);
- if (cec_is_registered(adap) && list_empty(&devnode->fhs) &&
- !adap->needs_hpd && adap->phys_addr == CEC_PHYS_ADDR_INVALID) {
- WARN_ON(adap->ops->adap_enable(adap, false));
- }
mutex_unlock(&devnode->lock);
/* Unhook pending transmits from this filehandle. */
Don't enable/disable the adapter if the first fh is opened or the last fh is closed, instead do this when the adapter is configured or unconfigured. However, if needs_hpd is true, then do this when the physical address is set or cleared: in that case the adapter typically is powered by the HPD, so it really is disabled when the HPD is low. This case (needs_hpd is true) was already handled in this way, so this wasn't changed. The problem with the old behavior was that if the HPD goes low when no fh is open, and a transmit was in progress, then the adapter would be disabled, typically stopping the transmit immediately which leaves a partial message on the bus, which isn't nice and can confuse some adapters. It makes much more sense to disable it only when the adapter is unconfigured, since then you really won't be using it anymore. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> --- drivers/media/cec/core/cec-adap.c | 38 ++++++++++++++++++++++++------- drivers/media/cec/core/cec-api.c | 18 +-------------- 2 files changed, 31 insertions(+), 25 deletions(-)