From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from gofer.mess.org ([80.229.237.210]:42715 "EHLO gofer.mess.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751696AbcLFKTZ (ORCPT ); Tue, 6 Dec 2016 05:19:25 -0500 From: Sean Young To: linux-media@vger.kernel.org Cc: James Hogan , =?UTF-8?q?Antti=20Sepp=C3=A4l=C3=A4?= , =?UTF-8?q?David=20H=C3=A4rdeman?= Subject: [PATCH v4 05/13] [media] rc: rc-ir-raw: Add scancode encoder callback Date: Tue, 6 Dec 2016 10:19:13 +0000 Message-Id: <649b9b8c136cc1df0e4e084853f60e68ebb949ee.1481019109.git.sean@mess.org> In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: From: James Hogan 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 Signed-off-by: Antti Seppälä Signed-off-by: Sean Young Cc: David Härdeman --- drivers/media/rc/rc-core-priv.h | 3 +++ drivers/media/rc/rc-ir-raw.c | 37 +++++++++++++++++++++++++++++++++++++ include/media/rc-core.h | 3 +++ 3 files changed, 43 insertions(+) diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index 585d5e5..98cc0cf 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -28,6 +28,9 @@ 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)(enum rc_type protocol, + 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/drivers/media/rc/rc-ir-raw.c b/drivers/media/rc/rc-ir-raw.c index 171bdba..1b229ef 100644 --- a/drivers/media/rc/rc-ir-raw.c +++ b/drivers/media/rc/rc-ir-raw.c @@ -249,6 +249,43 @@ 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, + const struct rc_scancode_filter *scancode, + struct ir_raw_event *events, unsigned int max) +{ + struct ir_raw_handler *handler; + int ret = -EINVAL; + + mutex_lock(&ir_raw_handler_lock); + list_for_each_entry(handler, &ir_raw_handler_list, list) { + if (handler->protocols & (1 << protocol) && 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 */ diff --git a/include/media/rc-core.h b/include/media/rc-core.h index 3c34cac..0a72e17 100644 --- a/include/media/rc-core.h +++ b/include/media/rc-core.h @@ -307,6 +307,9 @@ 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(enum rc_type protocol, + 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) { -- 2.9.3