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-rw-r--r--drivers/media/cec/cec-adap.c18
-rw-r--r--drivers/media/cec/cec-api.c18
-rw-r--r--drivers/media/cec/cec-core.c8
-rw-r--r--include/media/cec-pin.h4
-rw-r--r--include/media/cec.h12
-rw-r--r--include/uapi/linux/cec.h2
6 files changed, 52 insertions, 10 deletions
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index 84d1b67f850c..dd0c9cacd1d0 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -86,7 +86,7 @@ void cec_queue_event_fh(struct cec_fh *fh,
const struct cec_event *new_ev, u64 ts)
{
static const u8 max_events[CEC_NUM_EVENTS] = {
- 1, 1, 64, 64,
+ 1, 1, 64, 64, 8, 8,
};
struct cec_event_entry *entry;
unsigned int ev_idx = new_ev->event - 1;
@@ -170,6 +170,22 @@ void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
}
EXPORT_SYMBOL_GPL(cec_queue_pin_cec_event);
+/* Notify userspace that the HPD pin changed state at the given time. */
+void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
+{
+ struct cec_event ev = {
+ .event = is_high ? CEC_EVENT_PIN_HPD_HIGH :
+ CEC_EVENT_PIN_HPD_LOW,
+ };
+ struct cec_fh *fh;
+
+ mutex_lock(&adap->devnode.lock);
+ list_for_each_entry(fh, &adap->devnode.fhs, list)
+ cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
+ mutex_unlock(&adap->devnode.lock);
+}
+EXPORT_SYMBOL_GPL(cec_queue_pin_hpd_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 a079f7fe018c..465bb3ec21f6 100644
--- a/drivers/media/cec/cec-api.c
+++ b/drivers/media/cec/cec-api.c
@@ -529,7 +529,7 @@ static int cec_open(struct inode *inode, struct file *filp)
* Initial events that are automatically sent when the cec device is
* opened.
*/
- struct cec_event ev_state = {
+ struct cec_event ev = {
.event = CEC_EVENT_STATE_CHANGE,
.flags = CEC_EVENT_FL_INITIAL_STATE,
};
@@ -569,9 +569,19 @@ static int cec_open(struct inode *inode, struct file *filp)
filp->private_data = fh;
/* Queue up initial state events */
- ev_state.state_change.phys_addr = adap->phys_addr;
- ev_state.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
- cec_queue_event_fh(fh, &ev_state, 0);
+ ev.state_change.phys_addr = adap->phys_addr;
+ ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
+ cec_queue_event_fh(fh, &ev, 0);
+#ifdef CONFIG_CEC_PIN
+ if (adap->pin && adap->pin->ops->read_hpd) {
+ err = adap->pin->ops->read_hpd(adap);
+ if (err >= 0) {
+ ev.event = err ? CEC_EVENT_PIN_HPD_HIGH :
+ CEC_EVENT_PIN_HPD_LOW;
+ cec_queue_event_fh(fh, &ev, 0);
+ }
+ }
+#endif
list_add(&fh->list, &devnode->fhs);
mutex_unlock(&devnode->lock);
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c
index 648136e552d5..e3a1fb6d6690 100644
--- a/drivers/media/cec/cec-core.c
+++ b/drivers/media/cec/cec-core.c
@@ -112,10 +112,6 @@ static int __must_check cec_devnode_register(struct cec_devnode *devnode,
int minor;
int ret;
- /* Initialization */
- INIT_LIST_HEAD(&devnode->fhs);
- mutex_init(&devnode->lock);
-
/* Part 1: Find a free minor number */
mutex_lock(&cec_devnode_lock);
minor = find_next_zero_bit(cec_devnode_nums, CEC_NUM_DEVICES, 0);
@@ -242,6 +238,10 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
INIT_LIST_HEAD(&adap->wait_queue);
init_waitqueue_head(&adap->kthread_waitq);
+ /* adap->devnode initialization */
+ INIT_LIST_HEAD(&adap->devnode.fhs);
+ mutex_init(&adap->devnode.lock);
+
adap->kthread = kthread_run(cec_thread_func, adap, "cec-%s", name);
if (IS_ERR(adap->kthread)) {
pr_err("cec-%s: kernel_thread() failed\n", name);
diff --git a/include/media/cec-pin.h b/include/media/cec-pin.h
index f09cc9579d53..ea84b9c9e0c3 100644
--- a/include/media/cec-pin.h
+++ b/include/media/cec-pin.h
@@ -97,6 +97,9 @@ enum cec_pin_state {
* @free: optional. Free any allocated resources. Called when the
* adapter is deleted.
* @status: optional, log status information.
+ * @read_hpd: read the HPD pin. Return true if high, false if low or
+ * an error if negative. If NULL or -ENOTTY is returned,
+ * then this is not supported.
*
* These operations are used by the cec pin framework to manipulate
* the CEC pin.
@@ -109,6 +112,7 @@ struct cec_pin_ops {
void (*disable_irq)(struct cec_adapter *adap);
void (*free)(struct cec_adapter *adap);
void (*status)(struct cec_adapter *adap, struct seq_file *file);
+ int (*read_hpd)(struct cec_adapter *adap);
};
#define CEC_NUM_PIN_EVENTS 128
diff --git a/include/media/cec.h b/include/media/cec.h
index df6b3bd31284..9d0f983faea9 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -91,7 +91,7 @@ struct cec_event_entry {
};
#define CEC_NUM_CORE_EVENTS 2
-#define CEC_NUM_EVENTS CEC_EVENT_PIN_CEC_HIGH
+#define CEC_NUM_EVENTS CEC_EVENT_PIN_HPD_HIGH
struct cec_fh {
struct list_head list;
@@ -297,6 +297,16 @@ void cec_queue_pin_cec_event(struct cec_adapter *adap,
bool is_high, ktime_t ts);
/**
+ * cec_queue_pin_hpd_event() - queue a pin event with a given timestamp.
+ *
+ * @adap: pointer to the cec adapter
+ * @is_high: when true the HPD pin is high, otherwise it is low
+ * @ts: the timestamp for this event
+ *
+ */
+void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts);
+
+/**
* cec_get_edid_phys_addr() - find and return the physical address
*
* @edid: pointer to the EDID data
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index 4351c3481aea..b9f8df3a0477 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -410,6 +410,8 @@ struct cec_log_addrs {
#define CEC_EVENT_LOST_MSGS 2
#define CEC_EVENT_PIN_CEC_LOW 3
#define CEC_EVENT_PIN_CEC_HIGH 4
+#define CEC_EVENT_PIN_HPD_LOW 5
+#define CEC_EVENT_PIN_HPD_HIGH 6
#define CEC_EVENT_FL_INITIAL_STATE (1 << 0)
#define CEC_EVENT_FL_DROPPED_EVENTS (1 << 1)