1 // SPDX-License-Identifier: GPL-2.0-only
3 * cec-adap.c - HDMI Consumer Electronics Control framework - CEC adapter
5 * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
8 #include <linux/errno.h>
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/kmod.h>
13 #include <linux/ktime.h>
14 #include <linux/slab.h>
16 #include <linux/string.h>
17 #include <linux/types.h>
19 #include <drm/drm_connector.h>
20 #include <drm/drm_device.h>
21 #include <drm/drm_edid.h>
22 #include <drm/drm_file.h>
26 static void cec_fill_msg_report_features(struct cec_adapter *adap,
31 * 400 ms is the time it takes for one 16 byte message to be
32 * transferred and 5 is the maximum number of retries. Add
33 * another 100 ms as a margin. So if the transmit doesn't
34 * finish before that time something is really wrong and we
37 * This is a sign that something it really wrong and a warning
40 #define CEC_XFER_TIMEOUT_MS (5 * 400 + 100)
42 #define call_op(adap, op, arg...) \
43 (adap->ops->op ? adap->ops->op(adap, ## arg) : 0)
45 #define call_void_op(adap, op, arg...) \
48 adap->ops->op(adap, ## arg); \
51 static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr)
55 for (i = 0; i < adap->log_addrs.num_log_addrs; i++)
56 if (adap->log_addrs.log_addr[i] == log_addr)
61 static unsigned int cec_log_addr2dev(const struct cec_adapter *adap, u8 log_addr)
63 int i = cec_log_addr2idx(adap, log_addr);
65 return adap->log_addrs.primary_device_type[i < 0 ? 0 : i];
68 u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
71 unsigned int loc = cec_get_edid_spa_location(edid, size);
76 return CEC_PHYS_ADDR_INVALID;
77 return (edid[loc] << 8) | edid[loc + 1];
79 EXPORT_SYMBOL_GPL(cec_get_edid_phys_addr);
81 void cec_fill_conn_info_from_drm(struct cec_connector_info *conn_info,
82 const struct drm_connector *connector)
84 memset(conn_info, 0, sizeof(*conn_info));
85 conn_info->type = CEC_CONNECTOR_TYPE_DRM;
86 conn_info->drm.card_no = connector->dev->primary->index;
87 conn_info->drm.connector_id = connector->base.id;
89 EXPORT_SYMBOL_GPL(cec_fill_conn_info_from_drm);
92 * Queue a new event for this filehandle. If ts == 0, then set it
93 * to the current time.
95 * We keep a queue of at most max_event events where max_event differs
96 * per event. If the queue becomes full, then drop the oldest event and
97 * keep track of how many events we've dropped.
99 void cec_queue_event_fh(struct cec_fh *fh,
100 const struct cec_event *new_ev, u64 ts)
102 static const u16 max_events[CEC_NUM_EVENTS] = {
103 1, 1, 800, 800, 8, 8, 8, 8
105 struct cec_event_entry *entry;
106 unsigned int ev_idx = new_ev->event - 1;
108 if (WARN_ON(ev_idx >= ARRAY_SIZE(fh->events)))
114 mutex_lock(&fh->lock);
115 if (ev_idx < CEC_NUM_CORE_EVENTS)
116 entry = &fh->core_events[ev_idx];
118 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
120 if (new_ev->event == CEC_EVENT_LOST_MSGS &&
121 fh->queued_events[ev_idx]) {
122 entry->ev.lost_msgs.lost_msgs +=
123 new_ev->lost_msgs.lost_msgs;
129 if (fh->queued_events[ev_idx] < max_events[ev_idx]) {
130 /* Add new msg at the end of the queue */
131 list_add_tail(&entry->list, &fh->events[ev_idx]);
132 fh->queued_events[ev_idx]++;
133 fh->total_queued_events++;
137 if (ev_idx >= CEC_NUM_CORE_EVENTS) {
138 list_add_tail(&entry->list, &fh->events[ev_idx]);
139 /* drop the oldest event */
140 entry = list_first_entry(&fh->events[ev_idx],
141 struct cec_event_entry, list);
142 list_del(&entry->list);
146 /* Mark that events were lost */
147 entry = list_first_entry_or_null(&fh->events[ev_idx],
148 struct cec_event_entry, list);
150 entry->ev.flags |= CEC_EVENT_FL_DROPPED_EVENTS;
153 mutex_unlock(&fh->lock);
154 wake_up_interruptible(&fh->wait);
157 /* Queue a new event for all open filehandles. */
158 static void cec_queue_event(struct cec_adapter *adap,
159 const struct cec_event *ev)
161 u64 ts = ktime_get_ns();
164 mutex_lock(&adap->devnode.lock);
165 list_for_each_entry(fh, &adap->devnode.fhs, list)
166 cec_queue_event_fh(fh, ev, ts);
167 mutex_unlock(&adap->devnode.lock);
170 /* Notify userspace that the CEC pin changed state at the given time. */
171 void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high,
172 bool dropped_events, ktime_t ts)
174 struct cec_event ev = {
175 .event = is_high ? CEC_EVENT_PIN_CEC_HIGH :
176 CEC_EVENT_PIN_CEC_LOW,
177 .flags = dropped_events ? CEC_EVENT_FL_DROPPED_EVENTS : 0,
181 mutex_lock(&adap->devnode.lock);
182 list_for_each_entry(fh, &adap->devnode.fhs, list)
183 if (fh->mode_follower == CEC_MODE_MONITOR_PIN)
184 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
185 mutex_unlock(&adap->devnode.lock);
187 EXPORT_SYMBOL_GPL(cec_queue_pin_cec_event);
189 /* Notify userspace that the HPD pin changed state at the given time. */
190 void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
192 struct cec_event ev = {
193 .event = is_high ? CEC_EVENT_PIN_HPD_HIGH :
194 CEC_EVENT_PIN_HPD_LOW,
198 mutex_lock(&adap->devnode.lock);
199 list_for_each_entry(fh, &adap->devnode.fhs, list)
200 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
201 mutex_unlock(&adap->devnode.lock);
203 EXPORT_SYMBOL_GPL(cec_queue_pin_hpd_event);
205 /* Notify userspace that the 5V pin changed state at the given time. */
206 void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
208 struct cec_event ev = {
209 .event = is_high ? CEC_EVENT_PIN_5V_HIGH :
210 CEC_EVENT_PIN_5V_LOW,
214 mutex_lock(&adap->devnode.lock);
215 list_for_each_entry(fh, &adap->devnode.fhs, list)
216 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
217 mutex_unlock(&adap->devnode.lock);
219 EXPORT_SYMBOL_GPL(cec_queue_pin_5v_event);
222 * Queue a new message for this filehandle.
224 * We keep a queue of at most CEC_MAX_MSG_RX_QUEUE_SZ messages. If the
225 * queue becomes full, then drop the oldest message and keep track
226 * of how many messages we've dropped.
228 static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg)
230 static const struct cec_event ev_lost_msgs = {
231 .event = CEC_EVENT_LOST_MSGS,
237 struct cec_msg_entry *entry;
239 mutex_lock(&fh->lock);
240 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
243 /* Add new msg at the end of the queue */
244 list_add_tail(&entry->list, &fh->msgs);
246 if (fh->queued_msgs < CEC_MAX_MSG_RX_QUEUE_SZ) {
247 /* All is fine if there is enough room */
249 mutex_unlock(&fh->lock);
250 wake_up_interruptible(&fh->wait);
255 * if the message queue is full, then drop the oldest one and
256 * send a lost message event.
258 entry = list_first_entry(&fh->msgs, struct cec_msg_entry, list);
259 list_del(&entry->list);
262 mutex_unlock(&fh->lock);
265 * We lost a message, either because kmalloc failed or the queue
268 cec_queue_event_fh(fh, &ev_lost_msgs, ktime_get_ns());
272 * Queue the message for those filehandles that are in monitor mode.
273 * If valid_la is true (this message is for us or was sent by us),
274 * then pass it on to any monitoring filehandle. If this message
275 * isn't for us or from us, then only give it to filehandles that
276 * are in MONITOR_ALL mode.
278 * This can only happen if the CEC_CAP_MONITOR_ALL capability is
279 * set and the CEC adapter was placed in 'monitor all' mode.
281 static void cec_queue_msg_monitor(struct cec_adapter *adap,
282 const struct cec_msg *msg,
286 u32 monitor_mode = valid_la ? CEC_MODE_MONITOR :
287 CEC_MODE_MONITOR_ALL;
289 mutex_lock(&adap->devnode.lock);
290 list_for_each_entry(fh, &adap->devnode.fhs, list) {
291 if (fh->mode_follower >= monitor_mode)
292 cec_queue_msg_fh(fh, msg);
294 mutex_unlock(&adap->devnode.lock);
298 * Queue the message for follower filehandles.
300 static void cec_queue_msg_followers(struct cec_adapter *adap,
301 const struct cec_msg *msg)
305 mutex_lock(&adap->devnode.lock);
306 list_for_each_entry(fh, &adap->devnode.fhs, list) {
307 if (fh->mode_follower == CEC_MODE_FOLLOWER)
308 cec_queue_msg_fh(fh, msg);
310 mutex_unlock(&adap->devnode.lock);
313 /* Notify userspace of an adapter state change. */
314 static void cec_post_state_event(struct cec_adapter *adap)
316 struct cec_event ev = {
317 .event = CEC_EVENT_STATE_CHANGE,
320 ev.state_change.phys_addr = adap->phys_addr;
321 ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
322 ev.state_change.have_conn_info =
323 adap->conn_info.type != CEC_CONNECTOR_TYPE_NO_CONNECTOR;
324 cec_queue_event(adap, &ev);
328 * A CEC transmit (and a possible wait for reply) completed.
329 * If this was in blocking mode, then complete it, otherwise
330 * queue the message for userspace to dequeue later.
332 * This function is called with adap->lock held.
334 static void cec_data_completed(struct cec_data *data)
337 * Delete this transmit from the filehandle's xfer_list since
338 * we're done with it.
340 * Note that if the filehandle is closed before this transmit
341 * finished, then the release() function will set data->fh to NULL.
342 * Without that we would be referring to a closed filehandle.
345 list_del(&data->xfer_list);
347 if (data->blocking) {
349 * Someone is blocking so mark the message as completed
352 data->completed = true;
356 * No blocking, so just queue the message if needed and
360 cec_queue_msg_fh(data->fh, &data->msg);
366 * A pending CEC transmit needs to be cancelled, either because the CEC
367 * adapter is disabled or the transmit takes an impossibly long time to
370 * This function is called with adap->lock held.
372 static void cec_data_cancel(struct cec_data *data, u8 tx_status)
375 * It's either the current transmit, or it is a pending
376 * transmit. Take the appropriate action to clear it.
378 if (data->adap->transmitting == data) {
379 data->adap->transmitting = NULL;
381 list_del_init(&data->list);
382 if (!(data->msg.tx_status & CEC_TX_STATUS_OK))
383 if (!WARN_ON(!data->adap->transmit_queue_sz))
384 data->adap->transmit_queue_sz--;
387 if (data->msg.tx_status & CEC_TX_STATUS_OK) {
388 data->msg.rx_ts = ktime_get_ns();
389 data->msg.rx_status = CEC_RX_STATUS_ABORTED;
391 data->msg.tx_ts = ktime_get_ns();
392 data->msg.tx_status |= tx_status |
393 CEC_TX_STATUS_MAX_RETRIES;
394 data->msg.tx_error_cnt++;
398 /* Queue transmitted message for monitoring purposes */
399 cec_queue_msg_monitor(data->adap, &data->msg, 1);
401 cec_data_completed(data);
405 * Flush all pending transmits and cancel any pending timeout work.
407 * This function is called with adap->lock held.
409 static void cec_flush(struct cec_adapter *adap)
411 struct cec_data *data, *n;
414 * If the adapter is disabled, or we're asked to stop,
415 * then cancel any pending transmits.
417 while (!list_empty(&adap->transmit_queue)) {
418 data = list_first_entry(&adap->transmit_queue,
419 struct cec_data, list);
420 cec_data_cancel(data, CEC_TX_STATUS_ABORTED);
422 if (adap->transmitting)
423 cec_data_cancel(adap->transmitting, CEC_TX_STATUS_ABORTED);
425 /* Cancel the pending timeout work. */
426 list_for_each_entry_safe(data, n, &adap->wait_queue, list) {
427 if (cancel_delayed_work(&data->work))
428 cec_data_cancel(data, CEC_TX_STATUS_OK);
430 * If cancel_delayed_work returned false, then
431 * the cec_wait_timeout function is running,
432 * which will call cec_data_completed. So no
433 * need to do anything special in that case.
437 * If something went wrong and this counter isn't what it should
438 * be, then this will reset it back to 0. Warn if it is not 0,
439 * since it indicates a bug, either in this framework or in a
442 if (WARN_ON(adap->transmit_queue_sz))
443 adap->transmit_queue_sz = 0;
447 * Main CEC state machine
449 * Wait until the thread should be stopped, or we are not transmitting and
450 * a new transmit message is queued up, in which case we start transmitting
451 * that message. When the adapter finished transmitting the message it will
452 * call cec_transmit_done().
454 * If the adapter is disabled, then remove all queued messages instead.
456 * If the current transmit times out, then cancel that transmit.
458 int cec_thread_func(void *_adap)
460 struct cec_adapter *adap = _adap;
463 unsigned int signal_free_time;
464 struct cec_data *data;
465 bool timeout = false;
468 if (adap->transmit_in_progress) {
472 * We are transmitting a message, so add a timeout
473 * to prevent the state machine to get stuck waiting
474 * for this message to finalize and add a check to
475 * see if the adapter is disabled in which case the
476 * transmit should be canceled.
478 err = wait_event_interruptible_timeout(adap->kthread_waitq,
480 (!adap->is_configured && !adap->is_configuring)) ||
481 kthread_should_stop() ||
482 (!adap->transmit_in_progress &&
483 !list_empty(&adap->transmit_queue)),
484 msecs_to_jiffies(CEC_XFER_TIMEOUT_MS));
487 /* Otherwise we just wait for something to happen. */
488 wait_event_interruptible(adap->kthread_waitq,
489 kthread_should_stop() ||
490 (!adap->transmit_in_progress &&
491 !list_empty(&adap->transmit_queue)));
494 mutex_lock(&adap->lock);
496 if ((adap->needs_hpd &&
497 (!adap->is_configured && !adap->is_configuring)) ||
498 kthread_should_stop()) {
503 if (adap->transmit_in_progress && timeout) {
505 * If we timeout, then log that. Normally this does
506 * not happen and it is an indication of a faulty CEC
507 * adapter driver, or the CEC bus is in some weird
508 * state. On rare occasions it can happen if there is
509 * so much traffic on the bus that the adapter was
510 * unable to transmit for CEC_XFER_TIMEOUT_MS (2.1s).
512 if (adap->transmitting) {
513 pr_warn("cec-%s: message %*ph timed out\n", adap->name,
514 adap->transmitting->msg.len,
515 adap->transmitting->msg.msg);
516 /* Just give up on this. */
517 cec_data_cancel(adap->transmitting,
518 CEC_TX_STATUS_TIMEOUT);
520 pr_warn("cec-%s: transmit timed out\n", adap->name);
522 adap->transmit_in_progress = false;
528 * If we are still transmitting, or there is nothing new to
529 * transmit, then just continue waiting.
531 if (adap->transmit_in_progress || list_empty(&adap->transmit_queue))
534 /* Get a new message to transmit */
535 data = list_first_entry(&adap->transmit_queue,
536 struct cec_data, list);
537 list_del_init(&data->list);
538 if (!WARN_ON(!data->adap->transmit_queue_sz))
539 adap->transmit_queue_sz--;
541 /* Make this the current transmitting message */
542 adap->transmitting = data;
545 * Suggested number of attempts as per the CEC 2.0 spec:
546 * 4 attempts is the default, except for 'secondary poll
547 * messages', i.e. poll messages not sent during the adapter
548 * configuration phase when it allocates logical addresses.
550 if (data->msg.len == 1 && adap->is_configured)
555 /* Set the suggested signal free time */
556 if (data->attempts) {
557 /* should be >= 3 data bit periods for a retry */
558 signal_free_time = CEC_SIGNAL_FREE_TIME_RETRY;
559 } else if (adap->last_initiator !=
560 cec_msg_initiator(&data->msg)) {
561 /* should be >= 5 data bit periods for new initiator */
562 signal_free_time = CEC_SIGNAL_FREE_TIME_NEW_INITIATOR;
563 adap->last_initiator = cec_msg_initiator(&data->msg);
566 * should be >= 7 data bit periods for sending another
567 * frame immediately after another.
569 signal_free_time = CEC_SIGNAL_FREE_TIME_NEXT_XFER;
571 if (data->attempts == 0)
572 data->attempts = attempts;
574 /* Tell the adapter to transmit, cancel on error */
575 if (adap->ops->adap_transmit(adap, data->attempts,
576 signal_free_time, &data->msg))
577 cec_data_cancel(data, CEC_TX_STATUS_ABORTED);
579 adap->transmit_in_progress = true;
582 mutex_unlock(&adap->lock);
584 if (kthread_should_stop())
591 * Called by the CEC adapter if a transmit finished.
593 void cec_transmit_done_ts(struct cec_adapter *adap, u8 status,
594 u8 arb_lost_cnt, u8 nack_cnt, u8 low_drive_cnt,
595 u8 error_cnt, ktime_t ts)
597 struct cec_data *data;
599 unsigned int attempts_made = arb_lost_cnt + nack_cnt +
600 low_drive_cnt + error_cnt;
602 dprintk(2, "%s: status 0x%02x\n", __func__, status);
603 if (attempts_made < 1)
606 mutex_lock(&adap->lock);
607 data = adap->transmitting;
610 * This might happen if a transmit was issued and the cable is
611 * unplugged while the transmit is ongoing. Ignore this
612 * transmit in that case.
614 if (!adap->transmit_in_progress)
615 dprintk(1, "%s was called without an ongoing transmit!\n",
617 adap->transmit_in_progress = false;
620 adap->transmit_in_progress = false;
624 /* Drivers must fill in the status! */
625 WARN_ON(status == 0);
626 msg->tx_ts = ktime_to_ns(ts);
627 msg->tx_status |= status;
628 msg->tx_arb_lost_cnt += arb_lost_cnt;
629 msg->tx_nack_cnt += nack_cnt;
630 msg->tx_low_drive_cnt += low_drive_cnt;
631 msg->tx_error_cnt += error_cnt;
633 /* Mark that we're done with this transmit */
634 adap->transmitting = NULL;
637 * If there are still retry attempts left and there was an error and
638 * the hardware didn't signal that it retried itself (by setting
639 * CEC_TX_STATUS_MAX_RETRIES), then we will retry ourselves.
641 if (data->attempts > attempts_made &&
642 !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) {
643 /* Retry this message */
644 data->attempts -= attempts_made;
646 dprintk(2, "retransmit: %*ph (attempts: %d, wait for 0x%02x)\n",
647 msg->len, msg->msg, data->attempts, msg->reply);
649 dprintk(2, "retransmit: %*ph (attempts: %d)\n",
650 msg->len, msg->msg, data->attempts);
651 /* Add the message in front of the transmit queue */
652 list_add(&data->list, &adap->transmit_queue);
653 adap->transmit_queue_sz++;
659 /* Always set CEC_TX_STATUS_MAX_RETRIES on error */
660 if (!(status & CEC_TX_STATUS_OK))
661 msg->tx_status |= CEC_TX_STATUS_MAX_RETRIES;
663 /* Queue transmitted message for monitoring purposes */
664 cec_queue_msg_monitor(adap, msg, 1);
666 if ((status & CEC_TX_STATUS_OK) && adap->is_configured &&
669 * Queue the message into the wait queue if we want to wait
672 list_add_tail(&data->list, &adap->wait_queue);
673 schedule_delayed_work(&data->work,
674 msecs_to_jiffies(msg->timeout));
676 /* Otherwise we're done */
677 cec_data_completed(data);
682 * Wake up the main thread to see if another message is ready
683 * for transmitting or to retry the current message.
685 wake_up_interruptible(&adap->kthread_waitq);
686 mutex_unlock(&adap->lock);
688 EXPORT_SYMBOL_GPL(cec_transmit_done_ts);
690 void cec_transmit_attempt_done_ts(struct cec_adapter *adap,
691 u8 status, ktime_t ts)
693 switch (status & ~CEC_TX_STATUS_MAX_RETRIES) {
694 case CEC_TX_STATUS_OK:
695 cec_transmit_done_ts(adap, status, 0, 0, 0, 0, ts);
697 case CEC_TX_STATUS_ARB_LOST:
698 cec_transmit_done_ts(adap, status, 1, 0, 0, 0, ts);
700 case CEC_TX_STATUS_NACK:
701 cec_transmit_done_ts(adap, status, 0, 1, 0, 0, ts);
703 case CEC_TX_STATUS_LOW_DRIVE:
704 cec_transmit_done_ts(adap, status, 0, 0, 1, 0, ts);
706 case CEC_TX_STATUS_ERROR:
707 cec_transmit_done_ts(adap, status, 0, 0, 0, 1, ts);
710 /* Should never happen */
711 WARN(1, "cec-%s: invalid status 0x%02x\n", adap->name, status);
715 EXPORT_SYMBOL_GPL(cec_transmit_attempt_done_ts);
718 * Called when waiting for a reply times out.
720 static void cec_wait_timeout(struct work_struct *work)
722 struct cec_data *data = container_of(work, struct cec_data, work.work);
723 struct cec_adapter *adap = data->adap;
725 mutex_lock(&adap->lock);
727 * Sanity check in case the timeout and the arrival of the message
728 * happened at the same time.
730 if (list_empty(&data->list))
733 /* Mark the message as timed out */
734 list_del_init(&data->list);
735 data->msg.rx_ts = ktime_get_ns();
736 data->msg.rx_status = CEC_RX_STATUS_TIMEOUT;
737 cec_data_completed(data);
739 mutex_unlock(&adap->lock);
743 * Transmit a message. The fh argument may be NULL if the transmit is not
744 * associated with a specific filehandle.
746 * This function is called with adap->lock held.
748 int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
749 struct cec_fh *fh, bool block)
751 struct cec_data *data;
752 bool is_raw = msg_is_raw(msg);
754 if (adap->devnode.unregistered)
761 msg->tx_arb_lost_cnt = 0;
762 msg->tx_nack_cnt = 0;
763 msg->tx_low_drive_cnt = 0;
764 msg->tx_error_cnt = 0;
767 if (msg->reply && msg->timeout == 0) {
768 /* Make sure the timeout isn't 0. */
771 msg->flags &= CEC_MSG_FL_REPLY_TO_FOLLOWERS | CEC_MSG_FL_RAW;
774 msg->flags &= ~CEC_MSG_FL_REPLY_TO_FOLLOWERS;
777 if (msg->len == 0 || msg->len > CEC_MAX_MSG_SIZE) {
778 dprintk(1, "%s: invalid length %d\n", __func__, msg->len);
782 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
785 dprintk(2, "%s: %*ph (wait for 0x%02x%s)\n",
786 __func__, msg->len, msg->msg, msg->reply,
787 !block ? ", nb" : "");
789 dprintk(2, "%s: %*ph%s\n",
790 __func__, msg->len, msg->msg, !block ? " (nb)" : "");
792 if (msg->timeout && msg->len == 1) {
793 dprintk(1, "%s: can't reply to poll msg\n", __func__);
798 if (!capable(CAP_SYS_RAWIO))
801 /* A CDC-Only device can only send CDC messages */
802 if ((adap->log_addrs.flags & CEC_LOG_ADDRS_FL_CDC_ONLY) &&
803 (msg->len == 1 || msg->msg[1] != CEC_MSG_CDC_MESSAGE)) {
804 dprintk(1, "%s: not a CDC message\n", __func__);
808 if (msg->len >= 4 && msg->msg[1] == CEC_MSG_CDC_MESSAGE) {
809 msg->msg[2] = adap->phys_addr >> 8;
810 msg->msg[3] = adap->phys_addr & 0xff;
814 if (cec_msg_destination(msg) == 0xf) {
815 dprintk(1, "%s: invalid poll message\n",
819 if (cec_has_log_addr(adap, cec_msg_destination(msg))) {
821 * If the destination is a logical address our
822 * adapter has already claimed, then just NACK
823 * this. It depends on the hardware what it will
824 * do with a POLL to itself (some OK this), so
825 * it is just as easy to handle it here so the
826 * behavior will be consistent.
828 msg->tx_ts = ktime_get_ns();
829 msg->tx_status = CEC_TX_STATUS_NACK |
830 CEC_TX_STATUS_MAX_RETRIES;
831 msg->tx_nack_cnt = 1;
832 msg->sequence = ++adap->sequence;
834 msg->sequence = ++adap->sequence;
838 if (msg->len > 1 && !cec_msg_is_broadcast(msg) &&
839 cec_has_log_addr(adap, cec_msg_destination(msg))) {
840 dprintk(1, "%s: destination is the adapter itself\n",
844 if (msg->len > 1 && adap->is_configured &&
845 !cec_has_log_addr(adap, cec_msg_initiator(msg))) {
846 dprintk(1, "%s: initiator has unknown logical address %d\n",
847 __func__, cec_msg_initiator(msg));
851 * Special case: allow Ping and IMAGE/TEXT_VIEW_ON to be
852 * transmitted to a TV, even if the adapter is unconfigured.
853 * This makes it possible to detect or wake up displays that
854 * pull down the HPD when in standby.
856 if (!adap->is_configured && !adap->is_configuring &&
858 cec_msg_destination(msg) != CEC_LOG_ADDR_TV ||
859 (msg->len == 2 && msg->msg[1] != CEC_MSG_IMAGE_VIEW_ON &&
860 msg->msg[1] != CEC_MSG_TEXT_VIEW_ON))) {
861 dprintk(1, "%s: adapter is unconfigured\n", __func__);
866 if (!adap->is_configured && !adap->is_configuring) {
867 if (adap->needs_hpd) {
868 dprintk(1, "%s: adapter is unconfigured and needs HPD\n",
873 dprintk(1, "%s: invalid msg->reply\n", __func__);
878 if (adap->transmit_queue_sz >= CEC_MAX_MSG_TX_QUEUE_SZ) {
879 dprintk(2, "%s: transmit queue full\n", __func__);
883 data = kzalloc(sizeof(*data), GFP_KERNEL);
887 msg->sequence = ++adap->sequence;
889 msg->sequence = ++adap->sequence;
894 data->blocking = block;
896 init_completion(&data->c);
897 INIT_DELAYED_WORK(&data->work, cec_wait_timeout);
900 list_add_tail(&data->xfer_list, &fh->xfer_list);
902 list_add_tail(&data->list, &adap->transmit_queue);
903 adap->transmit_queue_sz++;
904 if (!adap->transmitting)
905 wake_up_interruptible(&adap->kthread_waitq);
907 /* All done if we don't need to block waiting for completion */
912 * Release the lock and wait, retake the lock afterwards.
914 mutex_unlock(&adap->lock);
915 wait_for_completion_killable(&data->c);
916 if (!data->completed)
917 cancel_delayed_work_sync(&data->work);
918 mutex_lock(&adap->lock);
920 /* Cancel the transmit if it was interrupted */
921 if (!data->completed)
922 cec_data_cancel(data, CEC_TX_STATUS_ABORTED);
924 /* The transmit completed (possibly with an error) */
930 /* Helper function to be used by drivers and this framework. */
931 int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
936 mutex_lock(&adap->lock);
937 ret = cec_transmit_msg_fh(adap, msg, NULL, block);
938 mutex_unlock(&adap->lock);
941 EXPORT_SYMBOL_GPL(cec_transmit_msg);
944 * I don't like forward references but without this the low-level
945 * cec_received_msg() function would come after a bunch of high-level
946 * CEC protocol handling functions. That was very confusing.
948 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
951 #define DIRECTED 0x80
952 #define BCAST1_4 0x40
953 #define BCAST2_0 0x20 /* broadcast only allowed for >= 2.0 */
954 #define BCAST (BCAST1_4 | BCAST2_0)
955 #define BOTH (BCAST | DIRECTED)
958 * Specify minimum length and whether the message is directed, broadcast
959 * or both. Messages that do not match the criteria are ignored as per
960 * the CEC specification.
962 static const u8 cec_msg_size[256] = {
963 [CEC_MSG_ACTIVE_SOURCE] = 4 | BCAST,
964 [CEC_MSG_IMAGE_VIEW_ON] = 2 | DIRECTED,
965 [CEC_MSG_TEXT_VIEW_ON] = 2 | DIRECTED,
966 [CEC_MSG_INACTIVE_SOURCE] = 4 | DIRECTED,
967 [CEC_MSG_REQUEST_ACTIVE_SOURCE] = 2 | BCAST,
968 [CEC_MSG_ROUTING_CHANGE] = 6 | BCAST,
969 [CEC_MSG_ROUTING_INFORMATION] = 4 | BCAST,
970 [CEC_MSG_SET_STREAM_PATH] = 4 | BCAST,
971 [CEC_MSG_STANDBY] = 2 | BOTH,
972 [CEC_MSG_RECORD_OFF] = 2 | DIRECTED,
973 [CEC_MSG_RECORD_ON] = 3 | DIRECTED,
974 [CEC_MSG_RECORD_STATUS] = 3 | DIRECTED,
975 [CEC_MSG_RECORD_TV_SCREEN] = 2 | DIRECTED,
976 [CEC_MSG_CLEAR_ANALOGUE_TIMER] = 13 | DIRECTED,
977 [CEC_MSG_CLEAR_DIGITAL_TIMER] = 16 | DIRECTED,
978 [CEC_MSG_CLEAR_EXT_TIMER] = 13 | DIRECTED,
979 [CEC_MSG_SET_ANALOGUE_TIMER] = 13 | DIRECTED,
980 [CEC_MSG_SET_DIGITAL_TIMER] = 16 | DIRECTED,
981 [CEC_MSG_SET_EXT_TIMER] = 13 | DIRECTED,
982 [CEC_MSG_SET_TIMER_PROGRAM_TITLE] = 2 | DIRECTED,
983 [CEC_MSG_TIMER_CLEARED_STATUS] = 3 | DIRECTED,
984 [CEC_MSG_TIMER_STATUS] = 3 | DIRECTED,
985 [CEC_MSG_CEC_VERSION] = 3 | DIRECTED,
986 [CEC_MSG_GET_CEC_VERSION] = 2 | DIRECTED,
987 [CEC_MSG_GIVE_PHYSICAL_ADDR] = 2 | DIRECTED,
988 [CEC_MSG_GET_MENU_LANGUAGE] = 2 | DIRECTED,
989 [CEC_MSG_REPORT_PHYSICAL_ADDR] = 5 | BCAST,
990 [CEC_MSG_SET_MENU_LANGUAGE] = 5 | BCAST,
991 [CEC_MSG_REPORT_FEATURES] = 6 | BCAST,
992 [CEC_MSG_GIVE_FEATURES] = 2 | DIRECTED,
993 [CEC_MSG_DECK_CONTROL] = 3 | DIRECTED,
994 [CEC_MSG_DECK_STATUS] = 3 | DIRECTED,
995 [CEC_MSG_GIVE_DECK_STATUS] = 3 | DIRECTED,
996 [CEC_MSG_PLAY] = 3 | DIRECTED,
997 [CEC_MSG_GIVE_TUNER_DEVICE_STATUS] = 3 | DIRECTED,
998 [CEC_MSG_SELECT_ANALOGUE_SERVICE] = 6 | DIRECTED,
999 [CEC_MSG_SELECT_DIGITAL_SERVICE] = 9 | DIRECTED,
1000 [CEC_MSG_TUNER_DEVICE_STATUS] = 7 | DIRECTED,
1001 [CEC_MSG_TUNER_STEP_DECREMENT] = 2 | DIRECTED,
1002 [CEC_MSG_TUNER_STEP_INCREMENT] = 2 | DIRECTED,
1003 [CEC_MSG_DEVICE_VENDOR_ID] = 5 | BCAST,
1004 [CEC_MSG_GIVE_DEVICE_VENDOR_ID] = 2 | DIRECTED,
1005 [CEC_MSG_VENDOR_COMMAND] = 2 | DIRECTED,
1006 [CEC_MSG_VENDOR_COMMAND_WITH_ID] = 5 | BOTH,
1007 [CEC_MSG_VENDOR_REMOTE_BUTTON_DOWN] = 2 | BOTH,
1008 [CEC_MSG_VENDOR_REMOTE_BUTTON_UP] = 2 | BOTH,
1009 [CEC_MSG_SET_OSD_STRING] = 3 | DIRECTED,
1010 [CEC_MSG_GIVE_OSD_NAME] = 2 | DIRECTED,
1011 [CEC_MSG_SET_OSD_NAME] = 2 | DIRECTED,
1012 [CEC_MSG_MENU_REQUEST] = 3 | DIRECTED,
1013 [CEC_MSG_MENU_STATUS] = 3 | DIRECTED,
1014 [CEC_MSG_USER_CONTROL_PRESSED] = 3 | DIRECTED,
1015 [CEC_MSG_USER_CONTROL_RELEASED] = 2 | DIRECTED,
1016 [CEC_MSG_GIVE_DEVICE_POWER_STATUS] = 2 | DIRECTED,
1017 [CEC_MSG_REPORT_POWER_STATUS] = 3 | DIRECTED | BCAST2_0,
1018 [CEC_MSG_FEATURE_ABORT] = 4 | DIRECTED,
1019 [CEC_MSG_ABORT] = 2 | DIRECTED,
1020 [CEC_MSG_GIVE_AUDIO_STATUS] = 2 | DIRECTED,
1021 [CEC_MSG_GIVE_SYSTEM_AUDIO_MODE_STATUS] = 2 | DIRECTED,
1022 [CEC_MSG_REPORT_AUDIO_STATUS] = 3 | DIRECTED,
1023 [CEC_MSG_REPORT_SHORT_AUDIO_DESCRIPTOR] = 2 | DIRECTED,
1024 [CEC_MSG_REQUEST_SHORT_AUDIO_DESCRIPTOR] = 2 | DIRECTED,
1025 [CEC_MSG_SET_SYSTEM_AUDIO_MODE] = 3 | BOTH,
1026 [CEC_MSG_SYSTEM_AUDIO_MODE_REQUEST] = 2 | DIRECTED,
1027 [CEC_MSG_SYSTEM_AUDIO_MODE_STATUS] = 3 | DIRECTED,
1028 [CEC_MSG_SET_AUDIO_RATE] = 3 | DIRECTED,
1029 [CEC_MSG_INITIATE_ARC] = 2 | DIRECTED,
1030 [CEC_MSG_REPORT_ARC_INITIATED] = 2 | DIRECTED,
1031 [CEC_MSG_REPORT_ARC_TERMINATED] = 2 | DIRECTED,
1032 [CEC_MSG_REQUEST_ARC_INITIATION] = 2 | DIRECTED,
1033 [CEC_MSG_REQUEST_ARC_TERMINATION] = 2 | DIRECTED,
1034 [CEC_MSG_TERMINATE_ARC] = 2 | DIRECTED,
1035 [CEC_MSG_REQUEST_CURRENT_LATENCY] = 4 | BCAST,
1036 [CEC_MSG_REPORT_CURRENT_LATENCY] = 6 | BCAST,
1037 [CEC_MSG_CDC_MESSAGE] = 2 | BCAST,
1040 /* Called by the CEC adapter if a message is received */
1041 void cec_received_msg_ts(struct cec_adapter *adap,
1042 struct cec_msg *msg, ktime_t ts)
1044 struct cec_data *data;
1045 u8 msg_init = cec_msg_initiator(msg);
1046 u8 msg_dest = cec_msg_destination(msg);
1047 u8 cmd = msg->msg[1];
1048 bool is_reply = false;
1049 bool valid_la = true;
1052 if (WARN_ON(!msg->len || msg->len > CEC_MAX_MSG_SIZE))
1055 if (adap->devnode.unregistered)
1059 * Some CEC adapters will receive the messages that they transmitted.
1060 * This test filters out those messages by checking if we are the
1061 * initiator, and just returning in that case.
1063 * Note that this won't work if this is an Unregistered device.
1065 * It is bad practice if the hardware receives the message that it
1066 * transmitted and luckily most CEC adapters behave correctly in this
1069 if (msg_init != CEC_LOG_ADDR_UNREGISTERED &&
1070 cec_has_log_addr(adap, msg_init))
1073 msg->rx_ts = ktime_to_ns(ts);
1074 msg->rx_status = CEC_RX_STATUS_OK;
1075 msg->sequence = msg->reply = msg->timeout = 0;
1078 msg->tx_arb_lost_cnt = 0;
1079 msg->tx_nack_cnt = 0;
1080 msg->tx_low_drive_cnt = 0;
1081 msg->tx_error_cnt = 0;
1083 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
1085 mutex_lock(&adap->lock);
1086 dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
1088 adap->last_initiator = 0xff;
1090 /* Check if this message was for us (directed or broadcast). */
1091 if (!cec_msg_is_broadcast(msg))
1092 valid_la = cec_has_log_addr(adap, msg_dest);
1095 * Check if the length is not too short or if the message is a
1096 * broadcast message where a directed message was expected or
1097 * vice versa. If so, then the message has to be ignored (according
1098 * to section CEC 7.3 and CEC 12.2).
1100 if (valid_la && msg->len > 1 && cec_msg_size[cmd]) {
1101 u8 dir_fl = cec_msg_size[cmd] & BOTH;
1103 min_len = cec_msg_size[cmd] & 0x1f;
1104 if (msg->len < min_len)
1106 else if (!cec_msg_is_broadcast(msg) && !(dir_fl & DIRECTED))
1108 else if (cec_msg_is_broadcast(msg) && !(dir_fl & BCAST))
1110 else if (cec_msg_is_broadcast(msg) &&
1111 adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0 &&
1112 !(dir_fl & BCAST1_4))
1115 if (valid_la && min_len) {
1116 /* These messages have special length requirements */
1118 case CEC_MSG_TIMER_STATUS:
1119 if (msg->msg[2] & 0x10) {
1120 switch (msg->msg[2] & 0xf) {
1121 case CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE:
1122 case CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE:
1127 } else if ((msg->msg[2] & 0xf) == CEC_OP_PROG_ERROR_DUPLICATE) {
1132 case CEC_MSG_RECORD_ON:
1133 switch (msg->msg[2]) {
1134 case CEC_OP_RECORD_SRC_OWN:
1136 case CEC_OP_RECORD_SRC_DIGITAL:
1140 case CEC_OP_RECORD_SRC_ANALOG:
1144 case CEC_OP_RECORD_SRC_EXT_PLUG:
1148 case CEC_OP_RECORD_SRC_EXT_PHYS_ADDR:
1157 /* It's a valid message and not a poll or CDC message */
1158 if (valid_la && msg->len > 1 && cmd != CEC_MSG_CDC_MESSAGE) {
1159 bool abort = cmd == CEC_MSG_FEATURE_ABORT;
1161 /* The aborted command is in msg[2] */
1166 * Walk over all transmitted messages that are waiting for a
1169 list_for_each_entry(data, &adap->wait_queue, list) {
1170 struct cec_msg *dst = &data->msg;
1173 * The *only* CEC message that has two possible replies
1174 * is CEC_MSG_INITIATE_ARC.
1175 * In this case allow either of the two replies.
1177 if (!abort && dst->msg[1] == CEC_MSG_INITIATE_ARC &&
1178 (cmd == CEC_MSG_REPORT_ARC_INITIATED ||
1179 cmd == CEC_MSG_REPORT_ARC_TERMINATED) &&
1180 (dst->reply == CEC_MSG_REPORT_ARC_INITIATED ||
1181 dst->reply == CEC_MSG_REPORT_ARC_TERMINATED))
1184 /* Does the command match? */
1185 if ((abort && cmd != dst->msg[1]) ||
1186 (!abort && cmd != dst->reply))
1189 /* Does the addressing match? */
1190 if (msg_init != cec_msg_destination(dst) &&
1191 !cec_msg_is_broadcast(dst))
1194 /* We got a reply */
1195 memcpy(dst->msg, msg->msg, msg->len);
1196 dst->len = msg->len;
1197 dst->rx_ts = msg->rx_ts;
1198 dst->rx_status = msg->rx_status;
1200 dst->rx_status |= CEC_RX_STATUS_FEATURE_ABORT;
1201 msg->flags = dst->flags;
1202 msg->sequence = dst->sequence;
1203 /* Remove it from the wait_queue */
1204 list_del_init(&data->list);
1206 /* Cancel the pending timeout work */
1207 if (!cancel_delayed_work(&data->work)) {
1208 mutex_unlock(&adap->lock);
1209 cancel_delayed_work_sync(&data->work);
1210 mutex_lock(&adap->lock);
1213 * Mark this as a reply, provided someone is still
1214 * waiting for the answer.
1218 cec_data_completed(data);
1222 mutex_unlock(&adap->lock);
1224 /* Pass the message on to any monitoring filehandles */
1225 cec_queue_msg_monitor(adap, msg, valid_la);
1227 /* We're done if it is not for us or a poll message */
1228 if (!valid_la || msg->len <= 1)
1231 if (adap->log_addrs.log_addr_mask == 0)
1235 * Process the message on the protocol level. If is_reply is true,
1236 * then cec_receive_notify() won't pass on the reply to the listener(s)
1237 * since that was already done by cec_data_completed() above.
1239 cec_receive_notify(adap, msg, is_reply);
1241 EXPORT_SYMBOL_GPL(cec_received_msg_ts);
1243 /* Logical Address Handling */
1246 * Attempt to claim a specific logical address.
1248 * This function is called with adap->lock held.
1250 static int cec_config_log_addr(struct cec_adapter *adap,
1252 unsigned int log_addr)
1254 struct cec_log_addrs *las = &adap->log_addrs;
1255 struct cec_msg msg = { };
1256 const unsigned int max_retries = 2;
1260 if (cec_has_log_addr(adap, log_addr))
1263 /* Send poll message */
1265 msg.msg[0] = (log_addr << 4) | log_addr;
1267 for (i = 0; i < max_retries; i++) {
1268 err = cec_transmit_msg_fh(adap, &msg, NULL, true);
1271 * While trying to poll the physical address was reset
1272 * and the adapter was unconfigured, so bail out.
1274 if (adap->phys_addr == CEC_PHYS_ADDR_INVALID)
1281 * The message was aborted due to a disconnect or
1282 * unconfigure, just bail out.
1284 if (msg.tx_status & CEC_TX_STATUS_ABORTED)
1286 if (msg.tx_status & CEC_TX_STATUS_OK)
1288 if (msg.tx_status & CEC_TX_STATUS_NACK)
1291 * Retry up to max_retries times if the message was neither
1292 * OKed or NACKed. This can happen due to e.g. a Lost
1293 * Arbitration condition.
1298 * If we are unable to get an OK or a NACK after max_retries attempts
1299 * (and note that each attempt already consists of four polls), then
1300 * then we assume that something is really weird and that it is not a
1301 * good idea to try and claim this logical address.
1303 if (i == max_retries)
1307 * Message not acknowledged, so this logical
1308 * address is free to use.
1310 err = adap->ops->adap_log_addr(adap, log_addr);
1314 las->log_addr[idx] = log_addr;
1315 las->log_addr_mask |= 1 << log_addr;
1320 * Unconfigure the adapter: clear all logical addresses and send
1321 * the state changed event.
1323 * This function is called with adap->lock held.
1325 static void cec_adap_unconfigure(struct cec_adapter *adap)
1327 if (!adap->needs_hpd ||
1328 adap->phys_addr != CEC_PHYS_ADDR_INVALID)
1329 WARN_ON(adap->ops->adap_log_addr(adap, CEC_LOG_ADDR_INVALID));
1330 adap->log_addrs.log_addr_mask = 0;
1331 adap->is_configured = false;
1333 wake_up_interruptible(&adap->kthread_waitq);
1334 cec_post_state_event(adap);
1338 * Attempt to claim the required logical addresses.
1340 static int cec_config_thread_func(void *arg)
1342 /* The various LAs for each type of device */
1343 static const u8 tv_log_addrs[] = {
1344 CEC_LOG_ADDR_TV, CEC_LOG_ADDR_SPECIFIC,
1345 CEC_LOG_ADDR_INVALID
1347 static const u8 record_log_addrs[] = {
1348 CEC_LOG_ADDR_RECORD_1, CEC_LOG_ADDR_RECORD_2,
1349 CEC_LOG_ADDR_RECORD_3,
1350 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1351 CEC_LOG_ADDR_INVALID
1353 static const u8 tuner_log_addrs[] = {
1354 CEC_LOG_ADDR_TUNER_1, CEC_LOG_ADDR_TUNER_2,
1355 CEC_LOG_ADDR_TUNER_3, CEC_LOG_ADDR_TUNER_4,
1356 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1357 CEC_LOG_ADDR_INVALID
1359 static const u8 playback_log_addrs[] = {
1360 CEC_LOG_ADDR_PLAYBACK_1, CEC_LOG_ADDR_PLAYBACK_2,
1361 CEC_LOG_ADDR_PLAYBACK_3,
1362 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1363 CEC_LOG_ADDR_INVALID
1365 static const u8 audiosystem_log_addrs[] = {
1366 CEC_LOG_ADDR_AUDIOSYSTEM,
1367 CEC_LOG_ADDR_INVALID
1369 static const u8 specific_use_log_addrs[] = {
1370 CEC_LOG_ADDR_SPECIFIC,
1371 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1372 CEC_LOG_ADDR_INVALID
1374 static const u8 *type2addrs[6] = {
1375 [CEC_LOG_ADDR_TYPE_TV] = tv_log_addrs,
1376 [CEC_LOG_ADDR_TYPE_RECORD] = record_log_addrs,
1377 [CEC_LOG_ADDR_TYPE_TUNER] = tuner_log_addrs,
1378 [CEC_LOG_ADDR_TYPE_PLAYBACK] = playback_log_addrs,
1379 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = audiosystem_log_addrs,
1380 [CEC_LOG_ADDR_TYPE_SPECIFIC] = specific_use_log_addrs,
1382 static const u16 type2mask[] = {
1383 [CEC_LOG_ADDR_TYPE_TV] = CEC_LOG_ADDR_MASK_TV,
1384 [CEC_LOG_ADDR_TYPE_RECORD] = CEC_LOG_ADDR_MASK_RECORD,
1385 [CEC_LOG_ADDR_TYPE_TUNER] = CEC_LOG_ADDR_MASK_TUNER,
1386 [CEC_LOG_ADDR_TYPE_PLAYBACK] = CEC_LOG_ADDR_MASK_PLAYBACK,
1387 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
1388 [CEC_LOG_ADDR_TYPE_SPECIFIC] = CEC_LOG_ADDR_MASK_SPECIFIC,
1390 struct cec_adapter *adap = arg;
1391 struct cec_log_addrs *las = &adap->log_addrs;
1395 mutex_lock(&adap->lock);
1396 dprintk(1, "physical address: %x.%x.%x.%x, claim %d logical addresses\n",
1397 cec_phys_addr_exp(adap->phys_addr), las->num_log_addrs);
1398 las->log_addr_mask = 0;
1400 if (las->log_addr_type[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED)
1403 for (i = 0; i < las->num_log_addrs; i++) {
1404 unsigned int type = las->log_addr_type[i];
1409 * The TV functionality can only map to physical address 0.
1410 * For any other address, try the Specific functionality
1411 * instead as per the spec.
1413 if (adap->phys_addr && type == CEC_LOG_ADDR_TYPE_TV)
1414 type = CEC_LOG_ADDR_TYPE_SPECIFIC;
1416 la_list = type2addrs[type];
1417 last_la = las->log_addr[i];
1418 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1419 if (last_la == CEC_LOG_ADDR_INVALID ||
1420 last_la == CEC_LOG_ADDR_UNREGISTERED ||
1421 !((1 << last_la) & type2mask[type]))
1422 last_la = la_list[0];
1424 err = cec_config_log_addr(adap, i, last_la);
1425 if (err > 0) /* Reused last LA */
1431 for (j = 0; la_list[j] != CEC_LOG_ADDR_INVALID; j++) {
1432 /* Tried this one already, skip it */
1433 if (la_list[j] == last_la)
1435 /* The backup addresses are CEC 2.0 specific */
1436 if ((la_list[j] == CEC_LOG_ADDR_BACKUP_1 ||
1437 la_list[j] == CEC_LOG_ADDR_BACKUP_2) &&
1438 las->cec_version < CEC_OP_CEC_VERSION_2_0)
1441 err = cec_config_log_addr(adap, i, la_list[j]);
1442 if (err == 0) /* LA is in use */
1446 /* Done, claimed an LA */
1450 if (la_list[j] == CEC_LOG_ADDR_INVALID)
1451 dprintk(1, "could not claim LA %d\n", i);
1454 if (adap->log_addrs.log_addr_mask == 0 &&
1455 !(las->flags & CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK))
1459 if (adap->log_addrs.log_addr_mask == 0) {
1460 /* Fall back to unregistered */
1461 las->log_addr[0] = CEC_LOG_ADDR_UNREGISTERED;
1462 las->log_addr_mask = 1 << las->log_addr[0];
1463 for (i = 1; i < las->num_log_addrs; i++)
1464 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1466 for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++)
1467 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1468 adap->is_configured = true;
1469 adap->is_configuring = false;
1470 cec_post_state_event(adap);
1473 * Now post the Report Features and Report Physical Address broadcast
1474 * messages. Note that these are non-blocking transmits, meaning that
1475 * they are just queued up and once adap->lock is unlocked the main
1476 * thread will kick in and start transmitting these.
1478 * If after this function is done (but before one or more of these
1479 * messages are actually transmitted) the CEC adapter is unconfigured,
1480 * then any remaining messages will be dropped by the main thread.
1482 for (i = 0; i < las->num_log_addrs; i++) {
1483 struct cec_msg msg = {};
1485 if (las->log_addr[i] == CEC_LOG_ADDR_INVALID ||
1486 (las->flags & CEC_LOG_ADDRS_FL_CDC_ONLY))
1489 msg.msg[0] = (las->log_addr[i] << 4) | 0x0f;
1491 /* Report Features must come first according to CEC 2.0 */
1492 if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED &&
1493 adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0) {
1494 cec_fill_msg_report_features(adap, &msg, i);
1495 cec_transmit_msg_fh(adap, &msg, NULL, false);
1498 /* Report Physical Address */
1499 cec_msg_report_physical_addr(&msg, adap->phys_addr,
1500 las->primary_device_type[i]);
1501 dprintk(1, "config: la %d pa %x.%x.%x.%x\n",
1503 cec_phys_addr_exp(adap->phys_addr));
1504 cec_transmit_msg_fh(adap, &msg, NULL, false);
1506 /* Report Vendor ID */
1507 if (adap->log_addrs.vendor_id != CEC_VENDOR_ID_NONE) {
1508 cec_msg_device_vendor_id(&msg,
1509 adap->log_addrs.vendor_id);
1510 cec_transmit_msg_fh(adap, &msg, NULL, false);
1513 adap->kthread_config = NULL;
1514 complete(&adap->config_completion);
1515 mutex_unlock(&adap->lock);
1519 for (i = 0; i < las->num_log_addrs; i++)
1520 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1521 cec_adap_unconfigure(adap);
1522 adap->is_configuring = false;
1523 adap->kthread_config = NULL;
1524 complete(&adap->config_completion);
1525 mutex_unlock(&adap->lock);
1530 * Called from either __cec_s_phys_addr or __cec_s_log_addrs to claim the
1531 * logical addresses.
1533 * This function is called with adap->lock held.
1535 static void cec_claim_log_addrs(struct cec_adapter *adap, bool block)
1537 if (WARN_ON(adap->is_configuring || adap->is_configured))
1540 init_completion(&adap->config_completion);
1542 /* Ready to kick off the thread */
1543 adap->is_configuring = true;
1544 adap->kthread_config = kthread_run(cec_config_thread_func, adap,
1545 "ceccfg-%s", adap->name);
1546 if (IS_ERR(adap->kthread_config)) {
1547 adap->kthread_config = NULL;
1549 mutex_unlock(&adap->lock);
1550 wait_for_completion(&adap->config_completion);
1551 mutex_lock(&adap->lock);
1555 /* Set a new physical address and send an event notifying userspace of this.
1557 * This function is called with adap->lock held.
1559 void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1561 if (phys_addr == adap->phys_addr)
1563 if (phys_addr != CEC_PHYS_ADDR_INVALID && adap->devnode.unregistered)
1566 dprintk(1, "new physical address %x.%x.%x.%x\n",
1567 cec_phys_addr_exp(phys_addr));
1568 if (phys_addr == CEC_PHYS_ADDR_INVALID ||
1569 adap->phys_addr != CEC_PHYS_ADDR_INVALID) {
1570 adap->phys_addr = CEC_PHYS_ADDR_INVALID;
1571 cec_post_state_event(adap);
1572 cec_adap_unconfigure(adap);
1573 /* Disabling monitor all mode should always succeed */
1574 if (adap->monitor_all_cnt)
1575 WARN_ON(call_op(adap, adap_monitor_all_enable, false));
1576 mutex_lock(&adap->devnode.lock);
1577 if (adap->needs_hpd || list_empty(&adap->devnode.fhs)) {
1578 WARN_ON(adap->ops->adap_enable(adap, false));
1579 adap->transmit_in_progress = false;
1580 wake_up_interruptible(&adap->kthread_waitq);
1582 mutex_unlock(&adap->devnode.lock);
1583 if (phys_addr == CEC_PHYS_ADDR_INVALID)
1587 mutex_lock(&adap->devnode.lock);
1588 adap->last_initiator = 0xff;
1589 adap->transmit_in_progress = false;
1591 if ((adap->needs_hpd || list_empty(&adap->devnode.fhs)) &&
1592 adap->ops->adap_enable(adap, true)) {
1593 mutex_unlock(&adap->devnode.lock);
1597 if (adap->monitor_all_cnt &&
1598 call_op(adap, adap_monitor_all_enable, true)) {
1599 if (adap->needs_hpd || list_empty(&adap->devnode.fhs))
1600 WARN_ON(adap->ops->adap_enable(adap, false));
1601 mutex_unlock(&adap->devnode.lock);
1604 mutex_unlock(&adap->devnode.lock);
1606 adap->phys_addr = phys_addr;
1607 cec_post_state_event(adap);
1608 if (adap->log_addrs.num_log_addrs)
1609 cec_claim_log_addrs(adap, block);
1612 void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1614 if (IS_ERR_OR_NULL(adap))
1617 mutex_lock(&adap->lock);
1618 __cec_s_phys_addr(adap, phys_addr, block);
1619 mutex_unlock(&adap->lock);
1621 EXPORT_SYMBOL_GPL(cec_s_phys_addr);
1623 void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
1624 const struct edid *edid)
1626 u16 pa = CEC_PHYS_ADDR_INVALID;
1628 if (edid && edid->extensions)
1629 pa = cec_get_edid_phys_addr((const u8 *)edid,
1630 EDID_LENGTH * (edid->extensions + 1), NULL);
1631 cec_s_phys_addr(adap, pa, false);
1633 EXPORT_SYMBOL_GPL(cec_s_phys_addr_from_edid);
1635 void cec_s_conn_info(struct cec_adapter *adap,
1636 const struct cec_connector_info *conn_info)
1638 if (IS_ERR_OR_NULL(adap))
1641 if (!(adap->capabilities & CEC_CAP_CONNECTOR_INFO))
1644 mutex_lock(&adap->lock);
1646 adap->conn_info = *conn_info;
1648 memset(&adap->conn_info, 0, sizeof(adap->conn_info));
1649 cec_post_state_event(adap);
1650 mutex_unlock(&adap->lock);
1652 EXPORT_SYMBOL_GPL(cec_s_conn_info);
1655 * Called from either the ioctl or a driver to set the logical addresses.
1657 * This function is called with adap->lock held.
1659 int __cec_s_log_addrs(struct cec_adapter *adap,
1660 struct cec_log_addrs *log_addrs, bool block)
1665 if (adap->devnode.unregistered)
1668 if (!log_addrs || log_addrs->num_log_addrs == 0) {
1669 cec_adap_unconfigure(adap);
1670 adap->log_addrs.num_log_addrs = 0;
1671 for (i = 0; i < CEC_MAX_LOG_ADDRS; i++)
1672 adap->log_addrs.log_addr[i] = CEC_LOG_ADDR_INVALID;
1673 adap->log_addrs.osd_name[0] = '\0';
1674 adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
1675 adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
1679 if (log_addrs->flags & CEC_LOG_ADDRS_FL_CDC_ONLY) {
1681 * Sanitize log_addrs fields if a CDC-Only device is
1684 log_addrs->num_log_addrs = 1;
1685 log_addrs->osd_name[0] = '\0';
1686 log_addrs->vendor_id = CEC_VENDOR_ID_NONE;
1687 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
1689 * This is just an internal convention since a CDC-Only device
1690 * doesn't have to be a switch. But switches already use
1691 * unregistered, so it makes some kind of sense to pick this
1692 * as the primary device. Since a CDC-Only device never sends
1693 * any 'normal' CEC messages this primary device type is never
1694 * sent over the CEC bus.
1696 log_addrs->primary_device_type[0] = CEC_OP_PRIM_DEVTYPE_SWITCH;
1697 log_addrs->all_device_types[0] = 0;
1698 log_addrs->features[0][0] = 0;
1699 log_addrs->features[0][1] = 0;
1702 /* Ensure the osd name is 0-terminated */
1703 log_addrs->osd_name[sizeof(log_addrs->osd_name) - 1] = '\0';
1706 if (log_addrs->num_log_addrs > adap->available_log_addrs) {
1707 dprintk(1, "num_log_addrs > %d\n", adap->available_log_addrs);
1712 * Vendor ID is a 24 bit number, so check if the value is
1713 * within the correct range.
1715 if (log_addrs->vendor_id != CEC_VENDOR_ID_NONE &&
1716 (log_addrs->vendor_id & 0xff000000) != 0) {
1717 dprintk(1, "invalid vendor ID\n");
1721 if (log_addrs->cec_version != CEC_OP_CEC_VERSION_1_4 &&
1722 log_addrs->cec_version != CEC_OP_CEC_VERSION_2_0) {
1723 dprintk(1, "invalid CEC version\n");
1727 if (log_addrs->num_log_addrs > 1)
1728 for (i = 0; i < log_addrs->num_log_addrs; i++)
1729 if (log_addrs->log_addr_type[i] ==
1730 CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1731 dprintk(1, "num_log_addrs > 1 can't be combined with unregistered LA\n");
1735 for (i = 0; i < log_addrs->num_log_addrs; i++) {
1736 const u8 feature_sz = ARRAY_SIZE(log_addrs->features[0]);
1737 u8 *features = log_addrs->features[i];
1738 bool op_is_dev_features = false;
1741 log_addrs->log_addr[i] = CEC_LOG_ADDR_INVALID;
1742 if (log_addrs->log_addr_type[i] > CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1743 dprintk(1, "unknown logical address type\n");
1746 if (type_mask & (1 << log_addrs->log_addr_type[i])) {
1747 dprintk(1, "duplicate logical address type\n");
1750 type_mask |= 1 << log_addrs->log_addr_type[i];
1751 if ((type_mask & (1 << CEC_LOG_ADDR_TYPE_RECORD)) &&
1752 (type_mask & (1 << CEC_LOG_ADDR_TYPE_PLAYBACK))) {
1753 /* Record already contains the playback functionality */
1754 dprintk(1, "invalid record + playback combination\n");
1757 if (log_addrs->primary_device_type[i] >
1758 CEC_OP_PRIM_DEVTYPE_PROCESSOR) {
1759 dprintk(1, "unknown primary device type\n");
1762 if (log_addrs->primary_device_type[i] == 2) {
1763 dprintk(1, "invalid primary device type\n");
1766 for (j = 0; j < feature_sz; j++) {
1767 if ((features[j] & 0x80) == 0) {
1768 if (op_is_dev_features)
1770 op_is_dev_features = true;
1773 if (!op_is_dev_features || j == feature_sz) {
1774 dprintk(1, "malformed features\n");
1777 /* Zero unused part of the feature array */
1778 memset(features + j + 1, 0, feature_sz - j - 1);
1781 if (log_addrs->cec_version >= CEC_OP_CEC_VERSION_2_0) {
1782 if (log_addrs->num_log_addrs > 2) {
1783 dprintk(1, "CEC 2.0 allows no more than 2 logical addresses\n");
1786 if (log_addrs->num_log_addrs == 2) {
1787 if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_AUDIOSYSTEM) |
1788 (1 << CEC_LOG_ADDR_TYPE_TV)))) {
1789 dprintk(1, "two LAs is only allowed for audiosystem and TV\n");
1792 if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_PLAYBACK) |
1793 (1 << CEC_LOG_ADDR_TYPE_RECORD)))) {
1794 dprintk(1, "an audiosystem/TV can only be combined with record or playback\n");
1800 /* Zero unused LAs */
1801 for (i = log_addrs->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++) {
1802 log_addrs->primary_device_type[i] = 0;
1803 log_addrs->log_addr_type[i] = 0;
1804 log_addrs->all_device_types[i] = 0;
1805 memset(log_addrs->features[i], 0,
1806 sizeof(log_addrs->features[i]));
1809 log_addrs->log_addr_mask = adap->log_addrs.log_addr_mask;
1810 adap->log_addrs = *log_addrs;
1811 if (adap->phys_addr != CEC_PHYS_ADDR_INVALID)
1812 cec_claim_log_addrs(adap, block);
1816 int cec_s_log_addrs(struct cec_adapter *adap,
1817 struct cec_log_addrs *log_addrs, bool block)
1821 mutex_lock(&adap->lock);
1822 err = __cec_s_log_addrs(adap, log_addrs, block);
1823 mutex_unlock(&adap->lock);
1826 EXPORT_SYMBOL_GPL(cec_s_log_addrs);
1828 /* High-level core CEC message handling */
1830 /* Fill in the Report Features message */
1831 static void cec_fill_msg_report_features(struct cec_adapter *adap,
1832 struct cec_msg *msg,
1833 unsigned int la_idx)
1835 const struct cec_log_addrs *las = &adap->log_addrs;
1836 const u8 *features = las->features[la_idx];
1837 bool op_is_dev_features = false;
1840 /* Report Features */
1841 msg->msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
1843 msg->msg[1] = CEC_MSG_REPORT_FEATURES;
1844 msg->msg[2] = adap->log_addrs.cec_version;
1845 msg->msg[3] = las->all_device_types[la_idx];
1847 /* Write RC Profiles first, then Device Features */
1848 for (idx = 0; idx < ARRAY_SIZE(las->features[0]); idx++) {
1849 msg->msg[msg->len++] = features[idx];
1850 if ((features[idx] & CEC_OP_FEAT_EXT) == 0) {
1851 if (op_is_dev_features)
1853 op_is_dev_features = true;
1858 /* Transmit the Feature Abort message */
1859 static int cec_feature_abort_reason(struct cec_adapter *adap,
1860 struct cec_msg *msg, u8 reason)
1862 struct cec_msg tx_msg = { };
1865 * Don't reply with CEC_MSG_FEATURE_ABORT to a CEC_MSG_FEATURE_ABORT
1868 if (msg->msg[1] == CEC_MSG_FEATURE_ABORT)
1870 /* Don't Feature Abort messages from 'Unregistered' */
1871 if (cec_msg_initiator(msg) == CEC_LOG_ADDR_UNREGISTERED)
1873 cec_msg_set_reply_to(&tx_msg, msg);
1874 cec_msg_feature_abort(&tx_msg, msg->msg[1], reason);
1875 return cec_transmit_msg(adap, &tx_msg, false);
1878 static int cec_feature_abort(struct cec_adapter *adap, struct cec_msg *msg)
1880 return cec_feature_abort_reason(adap, msg,
1881 CEC_OP_ABORT_UNRECOGNIZED_OP);
1884 static int cec_feature_refused(struct cec_adapter *adap, struct cec_msg *msg)
1886 return cec_feature_abort_reason(adap, msg,
1887 CEC_OP_ABORT_REFUSED);
1891 * Called when a CEC message is received. This function will do any
1892 * necessary core processing. The is_reply bool is true if this message
1893 * is a reply to an earlier transmit.
1895 * The message is either a broadcast message or a valid directed message.
1897 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
1900 bool is_broadcast = cec_msg_is_broadcast(msg);
1901 u8 dest_laddr = cec_msg_destination(msg);
1902 u8 init_laddr = cec_msg_initiator(msg);
1903 u8 devtype = cec_log_addr2dev(adap, dest_laddr);
1904 int la_idx = cec_log_addr2idx(adap, dest_laddr);
1905 bool from_unregistered = init_laddr == 0xf;
1906 struct cec_msg tx_cec_msg = { };
1908 dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
1910 /* If this is a CDC-Only device, then ignore any non-CDC messages */
1911 if (cec_is_cdc_only(&adap->log_addrs) &&
1912 msg->msg[1] != CEC_MSG_CDC_MESSAGE)
1915 if (adap->ops->received) {
1916 /* Allow drivers to process the message first */
1917 if (adap->ops->received(adap, msg) != -ENOMSG)
1922 * REPORT_PHYSICAL_ADDR, CEC_MSG_USER_CONTROL_PRESSED and
1923 * CEC_MSG_USER_CONTROL_RELEASED messages always have to be
1924 * handled by the CEC core, even if the passthrough mode is on.
1925 * The others are just ignored if passthrough mode is on.
1927 switch (msg->msg[1]) {
1928 case CEC_MSG_GET_CEC_VERSION:
1930 case CEC_MSG_GIVE_DEVICE_POWER_STATUS:
1931 case CEC_MSG_GIVE_OSD_NAME:
1933 * These messages reply with a directed message, so ignore if
1934 * the initiator is Unregistered.
1936 if (!adap->passthrough && from_unregistered)
1939 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
1940 case CEC_MSG_GIVE_FEATURES:
1941 case CEC_MSG_GIVE_PHYSICAL_ADDR:
1943 * Skip processing these messages if the passthrough mode
1946 if (adap->passthrough)
1947 goto skip_processing;
1948 /* Ignore if addressing is wrong */
1953 case CEC_MSG_USER_CONTROL_PRESSED:
1954 case CEC_MSG_USER_CONTROL_RELEASED:
1955 /* Wrong addressing mode: don't process */
1956 if (is_broadcast || from_unregistered)
1957 goto skip_processing;
1960 case CEC_MSG_REPORT_PHYSICAL_ADDR:
1962 * This message is always processed, regardless of the
1963 * passthrough setting.
1965 * Exception: don't process if wrong addressing mode.
1968 goto skip_processing;
1975 cec_msg_set_reply_to(&tx_cec_msg, msg);
1977 switch (msg->msg[1]) {
1978 /* The following messages are processed but still passed through */
1979 case CEC_MSG_REPORT_PHYSICAL_ADDR: {
1980 u16 pa = (msg->msg[2] << 8) | msg->msg[3];
1982 dprintk(1, "reported physical address %x.%x.%x.%x for logical address %d\n",
1983 cec_phys_addr_exp(pa), init_laddr);
1987 case CEC_MSG_USER_CONTROL_PRESSED:
1988 if (!(adap->capabilities & CEC_CAP_RC) ||
1989 !(adap->log_addrs.flags & CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU))
1992 #ifdef CONFIG_MEDIA_CEC_RC
1993 switch (msg->msg[2]) {
1995 * Play function, this message can have variable length
1996 * depending on the specific play function that is used.
1998 case CEC_OP_UI_CMD_PLAY_FUNCTION:
2000 rc_keydown(adap->rc, RC_PROTO_CEC,
2003 rc_keydown(adap->rc, RC_PROTO_CEC,
2004 msg->msg[2] << 8 | msg->msg[3], 0);
2007 * Other function messages that are not handled.
2008 * Currently the RC framework does not allow to supply an
2009 * additional parameter to a keypress. These "keys" contain
2010 * other information such as channel number, an input number
2012 * For the time being these messages are not processed by the
2013 * framework and are simply forwarded to the user space.
2015 case CEC_OP_UI_CMD_SELECT_BROADCAST_TYPE:
2016 case CEC_OP_UI_CMD_SELECT_SOUND_PRESENTATION:
2017 case CEC_OP_UI_CMD_TUNE_FUNCTION:
2018 case CEC_OP_UI_CMD_SELECT_MEDIA_FUNCTION:
2019 case CEC_OP_UI_CMD_SELECT_AV_INPUT_FUNCTION:
2020 case CEC_OP_UI_CMD_SELECT_AUDIO_INPUT_FUNCTION:
2023 rc_keydown(adap->rc, RC_PROTO_CEC, msg->msg[2], 0);
2029 case CEC_MSG_USER_CONTROL_RELEASED:
2030 if (!(adap->capabilities & CEC_CAP_RC) ||
2031 !(adap->log_addrs.flags & CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU))
2033 #ifdef CONFIG_MEDIA_CEC_RC
2039 * The remaining messages are only processed if the passthrough mode
2042 case CEC_MSG_GET_CEC_VERSION:
2043 cec_msg_cec_version(&tx_cec_msg, adap->log_addrs.cec_version);
2044 return cec_transmit_msg(adap, &tx_cec_msg, false);
2046 case CEC_MSG_GIVE_PHYSICAL_ADDR:
2047 /* Do nothing for CEC switches using addr 15 */
2048 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH && dest_laddr == 15)
2050 cec_msg_report_physical_addr(&tx_cec_msg, adap->phys_addr, devtype);
2051 return cec_transmit_msg(adap, &tx_cec_msg, false);
2053 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
2054 if (adap->log_addrs.vendor_id == CEC_VENDOR_ID_NONE)
2055 return cec_feature_abort(adap, msg);
2056 cec_msg_device_vendor_id(&tx_cec_msg, adap->log_addrs.vendor_id);
2057 return cec_transmit_msg(adap, &tx_cec_msg, false);
2060 /* Do nothing for CEC switches */
2061 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH)
2063 return cec_feature_refused(adap, msg);
2065 case CEC_MSG_GIVE_OSD_NAME: {
2066 if (adap->log_addrs.osd_name[0] == 0)
2067 return cec_feature_abort(adap, msg);
2068 cec_msg_set_osd_name(&tx_cec_msg, adap->log_addrs.osd_name);
2069 return cec_transmit_msg(adap, &tx_cec_msg, false);
2072 case CEC_MSG_GIVE_FEATURES:
2073 if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
2074 return cec_feature_abort(adap, msg);
2075 cec_fill_msg_report_features(adap, &tx_cec_msg, la_idx);
2076 return cec_transmit_msg(adap, &tx_cec_msg, false);
2080 * Unprocessed messages are aborted if userspace isn't doing
2081 * any processing either.
2083 if (!is_broadcast && !is_reply && !adap->follower_cnt &&
2084 !adap->cec_follower && msg->msg[1] != CEC_MSG_FEATURE_ABORT)
2085 return cec_feature_abort(adap, msg);
2090 /* If this was a reply, then we're done, unless otherwise specified */
2091 if (is_reply && !(msg->flags & CEC_MSG_FL_REPLY_TO_FOLLOWERS))
2095 * Send to the exclusive follower if there is one, otherwise send
2098 if (adap->cec_follower)
2099 cec_queue_msg_fh(adap->cec_follower, msg);
2101 cec_queue_msg_followers(adap, msg);
2106 * Helper functions to keep track of the 'monitor all' use count.
2108 * These functions are called with adap->lock held.
2110 int cec_monitor_all_cnt_inc(struct cec_adapter *adap)
2114 if (adap->monitor_all_cnt == 0)
2115 ret = call_op(adap, adap_monitor_all_enable, 1);
2117 adap->monitor_all_cnt++;
2121 void cec_monitor_all_cnt_dec(struct cec_adapter *adap)
2123 adap->monitor_all_cnt--;
2124 if (adap->monitor_all_cnt == 0)
2125 WARN_ON(call_op(adap, adap_monitor_all_enable, 0));
2129 * Helper functions to keep track of the 'monitor pin' use count.
2131 * These functions are called with adap->lock held.
2133 int cec_monitor_pin_cnt_inc(struct cec_adapter *adap)
2137 if (adap->monitor_pin_cnt == 0)
2138 ret = call_op(adap, adap_monitor_pin_enable, 1);
2140 adap->monitor_pin_cnt++;
2144 void cec_monitor_pin_cnt_dec(struct cec_adapter *adap)
2146 adap->monitor_pin_cnt--;
2147 if (adap->monitor_pin_cnt == 0)
2148 WARN_ON(call_op(adap, adap_monitor_pin_enable, 0));
2151 #ifdef CONFIG_DEBUG_FS
2153 * Log the current state of the CEC adapter.
2154 * Very useful for debugging.
2156 int cec_adap_status(struct seq_file *file, void *priv)
2158 struct cec_adapter *adap = dev_get_drvdata(file->private);
2159 struct cec_data *data;
2161 mutex_lock(&adap->lock);
2162 seq_printf(file, "configured: %d\n", adap->is_configured);
2163 seq_printf(file, "configuring: %d\n", adap->is_configuring);
2164 seq_printf(file, "phys_addr: %x.%x.%x.%x\n",
2165 cec_phys_addr_exp(adap->phys_addr));
2166 seq_printf(file, "number of LAs: %d\n", adap->log_addrs.num_log_addrs);
2167 seq_printf(file, "LA mask: 0x%04x\n", adap->log_addrs.log_addr_mask);
2168 if (adap->cec_follower)
2169 seq_printf(file, "has CEC follower%s\n",
2170 adap->passthrough ? " (in passthrough mode)" : "");
2171 if (adap->cec_initiator)
2172 seq_puts(file, "has CEC initiator\n");
2173 if (adap->monitor_all_cnt)
2174 seq_printf(file, "file handles in Monitor All mode: %u\n",
2175 adap->monitor_all_cnt);
2176 if (adap->tx_timeouts) {
2177 seq_printf(file, "transmit timeouts: %u\n",
2179 adap->tx_timeouts = 0;
2181 data = adap->transmitting;
2183 seq_printf(file, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n",
2184 data->msg.len, data->msg.msg, data->msg.reply,
2186 seq_printf(file, "pending transmits: %u\n", adap->transmit_queue_sz);
2187 list_for_each_entry(data, &adap->transmit_queue, list) {
2188 seq_printf(file, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n",
2189 data->msg.len, data->msg.msg, data->msg.reply,
2192 list_for_each_entry(data, &adap->wait_queue, list) {
2193 seq_printf(file, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n",
2194 data->msg.len, data->msg.msg, data->msg.reply,
2198 call_void_op(adap, adap_status, file);
2199 mutex_unlock(&adap->lock);