diff options
Diffstat (limited to 'drivers/media/rc/rc-ir-raw.c')
| -rw-r--r-- | drivers/media/rc/rc-ir-raw.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/media/rc/rc-ir-raw.c b/drivers/media/rc/rc-ir-raw.c index 68dfe8161cea..d1c9cbb86615 100644 --- a/drivers/media/rc/rc-ir-raw.c +++ b/drivers/media/rc/rc-ir-raw.c @@ -238,6 +238,43 @@ static void ir_raw_disable_protocols(struct rc_dev *dev, u64 protocols) mutex_unlock(&dev->lock); } +/** + * ir_raw_encode_scancode() - Encode a scancode as raw events + * + * @protocol: protocol + * @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: The number of events written. + * -ENOBUFS if there isn't enough space in the array to fit the + * encoding. In this case all @max events will have been written. + * -EINVAL if the scancode is ambiguous or invalid, or if no + * compatible encoder was found. + */ +int ir_raw_encode_scancode(enum rc_type protocol, u32 scancode, + struct ir_raw_event *events, unsigned int max) +{ + struct ir_raw_handler *handler; + int ret = -EINVAL; + u64 mask = 1ULL << protocol; + + mutex_lock(&ir_raw_handler_lock); + list_for_each_entry(handler, &ir_raw_handler_list, list) { + if (handler->protocols & mask && handler->encode) { + ret = handler->encode(protocol, scancode, events, max); + if (ret >= 0 || ret == -ENOBUFS) + break; + } + } + mutex_unlock(&ir_raw_handler_lock); + + return ret; +} +EXPORT_SYMBOL(ir_raw_encode_scancode); + /* * Used to (un)register raw event clients */ |