Add a callback to raw ir handlers for encoding and modulating a scancode
to a set of raw events. This could be used for transmit, or for
converting a wakeup scancode filter to a form that is more suitable for
raw hardware wake up filters.
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
---
drivers/media/rc/ir-raw.c | 37 +++++++++++++++++++++++++++++++++++++
drivers/media/rc/rc-core-priv.h | 2 ++
include/media/rc-core.h | 3 +++
3 files changed, 42 insertions(+)
diff --git a/drivers/media/rc/ir-raw.c b/drivers/media/rc/ir-raw.c
index 79a9cb6..9aea407 100644
--- a/drivers/media/rc/ir-raw.c
+++ b/drivers/media/rc/ir-raw.c
@@ -240,6 +240,43 @@ ir_raw_get_allowed_protocols(void)
return protocols;
}
+/**
+ * ir_raw_encode_scancode() - Encode a scancode as raw events
+ *
+ * @protocols: permitted protocols
+ * @scancode: scancode filter describing a single scancode
+ * @events: array of raw events to write into
+ * @max: max number of raw events
+ *
+ * Attempts to encode the scancode as raw events.
+ *
+ * Returns -EINVAL if the scancode is ambiguous or invalid, or there isn't
+ * enough space in the array to fit the encoding.
+ *
+ * Returns -ENOTSUPP if no compatible encoder is found.
+ */
+int ir_raw_encode_scancode(u64 protocols,
+ const struct rc_scancode_filter *scancode,
+ struct ir_raw_event *events, unsigned int max)
+{
+ struct ir_raw_handler *handler;
+ int ret = -ENOTSUPP;
+
+ mutex_lock(&ir_raw_handler_lock);
+ list_for_each_entry(handler, &ir_raw_handler_list, list) {
+ if (handler->protocols & protocols && handler->encode) {
+ ret = handler->encode(protocols, scancode, events, max);
+ if (ret >= 0)
+ break;
+ }
+ }
+ mutex_unlock(&ir_raw_handler_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(ir_raw_encode_scancode);
+
+
/*
* Used to (un)register raw event clients
*/
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index dc3b0b7..dfbaad0 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -25,6 +25,8 @@ struct ir_raw_handler {
u64 protocols; /* which are handled by this handler */
int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
+ int (*encode)(u64 protocols, const struct rc_scancode_filter *scancode,
+ struct ir_raw_event *events, unsigned int max);
/* These two should only be used by the lirc decoder */
int (*raw_register)(struct rc_dev *dev);
diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index 4a72176..7bd66be 100644
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -234,6 +234,9 @@ int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type);
int ir_raw_event_store_with_filter(struct rc_dev *dev,
struct ir_raw_event *ev);
void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
+int ir_raw_encode_scancode(u64 protocols,
+ const struct rc_scancode_filter *scancode,
+ struct ir_raw_event *events, unsigned int max);
static inline void ir_raw_event_reset(struct rc_dev *dev)
{
--
1.8.3.2
--
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