From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Add support for the new 5V CEC events
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/cec/cec-adap.c | 18 +++++++++++++++++-
drivers/media/cec/cec-api.c | 8 ++++++++
include/media/cec-pin.h | 4 ++++
include/media/cec.h | 12 +++++++++++-
4 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index b7fad0ec5710..030b2602faf0 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -74,7 +74,7 @@ void cec_queue_event_fh(struct cec_fh *fh,
const struct cec_event *new_ev, u64 ts)
{
static const u16 max_events[CEC_NUM_EVENTS] = {
- 1, 1, 800, 800, 8, 8,
+ 1, 1, 800, 800, 8, 8, 8, 8
};
struct cec_event_entry *entry;
unsigned int ev_idx = new_ev->event - 1;
@@ -176,6 +176,22 @@ void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
}
EXPORT_SYMBOL_GPL(cec_queue_pin_hpd_event);
+/* Notify userspace that the 5V pin changed state at the given time. */
+void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
+{
+ struct cec_event ev = {
+ .event = is_high ? CEC_EVENT_PIN_5V_HIGH :
+ CEC_EVENT_PIN_5V_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_5v_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 10b67fc40318..b6536bbad530 100644
--- a/drivers/media/cec/cec-api.c
+++ b/drivers/media/cec/cec-api.c
@@ -579,6 +579,14 @@ static int cec_open(struct inode *inode, struct file *filp)
cec_queue_event_fh(fh, &ev, 0);
}
}
+ if (adap->pin && adap->pin->ops->read_5v) {
+ err = adap->pin->ops->read_5v(adap);
+ if (err >= 0) {
+ ev.event = err ? CEC_EVENT_PIN_5V_HIGH :
+ CEC_EVENT_PIN_5V_LOW;
+ cec_queue_event_fh(fh, &ev, 0);
+ }
+ }
#endif
list_add(&fh->list, &devnode->fhs);
diff --git a/include/media/cec-pin.h b/include/media/cec-pin.h
index ed16c6dde0ba..604e79cb6cbf 100644
--- a/include/media/cec-pin.h
+++ b/include/media/cec-pin.h
@@ -25,6 +25,9 @@
* @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.
+ * @read_5v: read the 5V 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.
@@ -38,6 +41,7 @@ struct cec_pin_ops {
void (*free)(struct cec_adapter *adap);
void (*status)(struct cec_adapter *adap, struct seq_file *file);
int (*read_hpd)(struct cec_adapter *adap);
+ int (*read_5v)(struct cec_adapter *adap);
};
/**
diff --git a/include/media/cec.h b/include/media/cec.h
index 580ab1042898..ff9847f7f99d 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -79,7 +79,7 @@ struct cec_event_entry {
};
#define CEC_NUM_CORE_EVENTS 2
-#define CEC_NUM_EVENTS CEC_EVENT_PIN_HPD_HIGH
+#define CEC_NUM_EVENTS CEC_EVENT_PIN_5V_HIGH
struct cec_fh {
struct list_head list;
@@ -308,6 +308,16 @@ void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high,
*/
void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts);
+/**
+ * cec_queue_pin_5v_event() - queue a pin event with a given timestamp.
+ *
+ * @adap: pointer to the cec adapter
+ * @is_high: when true the 5V pin is high, otherwise it is low
+ * @ts: the timestamp for this event
+ *
+ */
+void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts);
+
/**
* cec_get_edid_phys_addr() - find and return the physical address
*
--
2.18.0
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