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_edid.h>
23 static void cec_fill_msg_report_features(struct cec_adapter *adap,
28 * 400 ms is the time it takes for one 16 byte message to be
29 * transferred and 5 is the maximum number of retries. Add
30 * another 100 ms as a margin. So if the transmit doesn't
31 * finish before that time something is really wrong and we
34 * This is a sign that something it really wrong and a warning
37 #define CEC_XFER_TIMEOUT_MS (5 * 400 + 100)
39 #define call_op(adap, op, arg...) \
40 (adap->ops->op ? adap->ops->op(adap, ## arg) : 0)
42 #define call_void_op(adap, op, arg...) \
45 adap->ops->op(adap, ## arg); \
48 static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr)
52 for (i = 0; i < adap->log_addrs.num_log_addrs; i++)
53 if (adap->log_addrs.log_addr[i] == log_addr)
58 static unsigned int cec_log_addr2dev(const struct cec_adapter *adap, u8 log_addr)
60 int i = cec_log_addr2idx(adap, log_addr);
62 return adap->log_addrs.primary_device_type[i < 0 ? 0 : i];
65 u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
68 unsigned int loc = cec_get_edid_spa_location(edid, size);
73 return CEC_PHYS_ADDR_INVALID;
74 return (edid[loc] << 8) | edid[loc + 1];
76 EXPORT_SYMBOL_GPL(cec_get_edid_phys_addr);
79 * Queue a new event for this filehandle. If ts == 0, then set it
80 * to the current time.
82 * We keep a queue of at most max_event events where max_event differs
83 * per event. If the queue becomes full, then drop the oldest event and
84 * keep track of how many events we've dropped.
86 void cec_queue_event_fh(struct cec_fh *fh,
87 const struct cec_event *new_ev, u64 ts)
89 static const u16 max_events[CEC_NUM_EVENTS] = {
90 1, 1, 800, 800, 8, 8, 8, 8
92 struct cec_event_entry *entry;
93 unsigned int ev_idx = new_ev->event - 1;
95 if (WARN_ON(ev_idx >= ARRAY_SIZE(fh->events)))
101 mutex_lock(&fh->lock);
102 if (ev_idx < CEC_NUM_CORE_EVENTS)
103 entry = &fh->core_events[ev_idx];
105 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
107 if (new_ev->event == CEC_EVENT_LOST_MSGS &&
108 fh->queued_events[ev_idx]) {
109 entry->ev.lost_msgs.lost_msgs +=
110 new_ev->lost_msgs.lost_msgs;
116 if (fh->queued_events[ev_idx] < max_events[ev_idx]) {
117 /* Add new msg at the end of the queue */
118 list_add_tail(&entry->list, &fh->events[ev_idx]);
119 fh->queued_events[ev_idx]++;
120 fh->total_queued_events++;
124 if (ev_idx >= CEC_NUM_CORE_EVENTS) {
125 list_add_tail(&entry->list, &fh->events[ev_idx]);
126 /* drop the oldest event */
127 entry = list_first_entry(&fh->events[ev_idx],
128 struct cec_event_entry, list);
129 list_del(&entry->list);
133 /* Mark that events were lost */
134 entry = list_first_entry_or_null(&fh->events[ev_idx],
135 struct cec_event_entry, list);
137 entry->ev.flags |= CEC_EVENT_FL_DROPPED_EVENTS;
140 mutex_unlock(&fh->lock);
141 wake_up_interruptible(&fh->wait);
144 /* Queue a new event for all open filehandles. */
145 static void cec_queue_event(struct cec_adapter *adap,
146 const struct cec_event *ev)
148 u64 ts = ktime_get_ns();
151 mutex_lock(&adap->devnode.lock);
152 list_for_each_entry(fh, &adap->devnode.fhs, list)
153 cec_queue_event_fh(fh, ev, ts);
154 mutex_unlock(&adap->devnode.lock);
157 /* Notify userspace that the CEC pin changed state at the given time. */
158 void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high,
159 bool dropped_events, ktime_t ts)
161 struct cec_event ev = {
162 .event = is_high ? CEC_EVENT_PIN_CEC_HIGH :
163 CEC_EVENT_PIN_CEC_LOW,
164 .flags = dropped_events ? CEC_EVENT_FL_DROPPED_EVENTS : 0,
168 mutex_lock(&adap->devnode.lock);
169 list_for_each_entry(fh, &adap->devnode.fhs, list)
170 if (fh->mode_follower == CEC_MODE_MONITOR_PIN)
171 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
172 mutex_unlock(&adap->devnode.lock);
174 EXPORT_SYMBOL_GPL(cec_queue_pin_cec_event);
176 /* Notify userspace that the HPD pin changed state at the given time. */
177 void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
179 struct cec_event ev = {
180 .event = is_high ? CEC_EVENT_PIN_HPD_HIGH :
181 CEC_EVENT_PIN_HPD_LOW,
185 mutex_lock(&adap->devnode.lock);
186 list_for_each_entry(fh, &adap->devnode.fhs, list)
187 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
188 mutex_unlock(&adap->devnode.lock);
190 EXPORT_SYMBOL_GPL(cec_queue_pin_hpd_event);
192 /* Notify userspace that the 5V pin changed state at the given time. */
193 void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
195 struct cec_event ev = {
196 .event = is_high ? CEC_EVENT_PIN_5V_HIGH :
197 CEC_EVENT_PIN_5V_LOW,
201 mutex_lock(&adap->devnode.lock);
202 list_for_each_entry(fh, &adap->devnode.fhs, list)
203 cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
204 mutex_unlock(&adap->devnode.lock);
206 EXPORT_SYMBOL_GPL(cec_queue_pin_5v_event);
209 * Queue a new message for this filehandle.
211 * We keep a queue of at most CEC_MAX_MSG_RX_QUEUE_SZ messages. If the
212 * queue becomes full, then drop the oldest message and keep track
213 * of how many messages we've dropped.
215 static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg)
217 static const struct cec_event ev_lost_msgs = {
218 .event = CEC_EVENT_LOST_MSGS,
224 struct cec_msg_entry *entry;
226 mutex_lock(&fh->lock);
227 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
230 /* Add new msg at the end of the queue */
231 list_add_tail(&entry->list, &fh->msgs);
233 if (fh->queued_msgs < CEC_MAX_MSG_RX_QUEUE_SZ) {
234 /* All is fine if there is enough room */
236 mutex_unlock(&fh->lock);
237 wake_up_interruptible(&fh->wait);
242 * if the message queue is full, then drop the oldest one and
243 * send a lost message event.
245 entry = list_first_entry(&fh->msgs, struct cec_msg_entry, list);
246 list_del(&entry->list);
249 mutex_unlock(&fh->lock);
252 * We lost a message, either because kmalloc failed or the queue
255 cec_queue_event_fh(fh, &ev_lost_msgs, ktime_get_ns());
259 * Queue the message for those filehandles that are in monitor mode.
260 * If valid_la is true (this message is for us or was sent by us),
261 * then pass it on to any monitoring filehandle. If this message
262 * isn't for us or from us, then only give it to filehandles that
263 * are in MONITOR_ALL mode.
265 * This can only happen if the CEC_CAP_MONITOR_ALL capability is
266 * set and the CEC adapter was placed in 'monitor all' mode.
268 static void cec_queue_msg_monitor(struct cec_adapter *adap,
269 const struct cec_msg *msg,
273 u32 monitor_mode = valid_la ? CEC_MODE_MONITOR :
274 CEC_MODE_MONITOR_ALL;
276 mutex_lock(&adap->devnode.lock);
277 list_for_each_entry(fh, &adap->devnode.fhs, list) {
278 if (fh->mode_follower >= monitor_mode)
279 cec_queue_msg_fh(fh, msg);
281 mutex_unlock(&adap->devnode.lock);
285 * Queue the message for follower filehandles.
287 static void cec_queue_msg_followers(struct cec_adapter *adap,
288 const struct cec_msg *msg)
292 mutex_lock(&adap->devnode.lock);
293 list_for_each_entry(fh, &adap->devnode.fhs, list) {
294 if (fh->mode_follower == CEC_MODE_FOLLOWER)
295 cec_queue_msg_fh(fh, msg);
297 mutex_unlock(&adap->devnode.lock);
300 /* Notify userspace of an adapter state change. */
301 static void cec_post_state_event(struct cec_adapter *adap)
303 struct cec_event ev = {
304 .event = CEC_EVENT_STATE_CHANGE,
307 ev.state_change.phys_addr = adap->phys_addr;
308 ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
309 cec_queue_event(adap, &ev);
313 * A CEC transmit (and a possible wait for reply) completed.
314 * If this was in blocking mode, then complete it, otherwise
315 * queue the message for userspace to dequeue later.
317 * This function is called with adap->lock held.
319 static void cec_data_completed(struct cec_data *data)
322 * Delete this transmit from the filehandle's xfer_list since
323 * we're done with it.
325 * Note that if the filehandle is closed before this transmit
326 * finished, then the release() function will set data->fh to NULL.
327 * Without that we would be referring to a closed filehandle.
330 list_del(&data->xfer_list);
332 if (data->blocking) {
334 * Someone is blocking so mark the message as completed
337 data->completed = true;
341 * No blocking, so just queue the message if needed and
345 cec_queue_msg_fh(data->fh, &data->msg);
351 * A pending CEC transmit needs to be cancelled, either because the CEC
352 * adapter is disabled or the transmit takes an impossibly long time to
355 * This function is called with adap->lock held.
357 static void cec_data_cancel(struct cec_data *data, u8 tx_status)
360 * It's either the current transmit, or it is a pending
361 * transmit. Take the appropriate action to clear it.
363 if (data->adap->transmitting == data) {
364 data->adap->transmitting = NULL;
366 list_del_init(&data->list);
367 if (!(data->msg.tx_status & CEC_TX_STATUS_OK))
368 if (!WARN_ON(!data->adap->transmit_queue_sz))
369 data->adap->transmit_queue_sz--;
372 if (data->msg.tx_status & CEC_TX_STATUS_OK) {
373 data->msg.rx_ts = ktime_get_ns();
374 data->msg.rx_status = CEC_RX_STATUS_ABORTED;
376 data->msg.tx_ts = ktime_get_ns();
377 data->msg.tx_status |= tx_status |
378 CEC_TX_STATUS_MAX_RETRIES;
379 data->msg.tx_error_cnt++;
383 /* Queue transmitted message for monitoring purposes */
384 cec_queue_msg_monitor(data->adap, &data->msg, 1);
386 cec_data_completed(data);
390 * Flush all pending transmits and cancel any pending timeout work.
392 * This function is called with adap->lock held.
394 static void cec_flush(struct cec_adapter *adap)
396 struct cec_data *data, *n;
399 * If the adapter is disabled, or we're asked to stop,
400 * then cancel any pending transmits.
402 while (!list_empty(&adap->transmit_queue)) {
403 data = list_first_entry(&adap->transmit_queue,
404 struct cec_data, list);
405 cec_data_cancel(data, CEC_TX_STATUS_ABORTED);
407 if (adap->transmitting)
408 cec_data_cancel(adap->transmitting, CEC_TX_STATUS_ABORTED);
410 /* Cancel the pending timeout work. */
411 list_for_each_entry_safe(data, n, &adap->wait_queue, list) {
412 if (cancel_delayed_work(&data->work))
413 cec_data_cancel(data, CEC_TX_STATUS_OK);
415 * If cancel_delayed_work returned false, then
416 * the cec_wait_timeout function is running,
417 * which will call cec_data_completed. So no
418 * need to do anything special in that case.
422 * If something went wrong and this counter isn't what it should
423 * be, then this will reset it back to 0. Warn if it is not 0,
424 * since it indicates a bug, either in this framework or in a
427 if (WARN_ON(adap->transmit_queue_sz))
428 adap->transmit_queue_sz = 0;
432 * Main CEC state machine
434 * Wait until the thread should be stopped, or we are not transmitting and
435 * a new transmit message is queued up, in which case we start transmitting
436 * that message. When the adapter finished transmitting the message it will
437 * call cec_transmit_done().
439 * If the adapter is disabled, then remove all queued messages instead.
441 * If the current transmit times out, then cancel that transmit.
443 int cec_thread_func(void *_adap)
445 struct cec_adapter *adap = _adap;
448 unsigned int signal_free_time;
449 struct cec_data *data;
450 bool timeout = false;
453 if (adap->transmit_in_progress) {
457 * We are transmitting a message, so add a timeout
458 * to prevent the state machine to get stuck waiting
459 * for this message to finalize and add a check to
460 * see if the adapter is disabled in which case the
461 * transmit should be canceled.
463 err = wait_event_interruptible_timeout(adap->kthread_waitq,
465 (!adap->is_configured && !adap->is_configuring)) ||
466 kthread_should_stop() ||
467 (!adap->transmit_in_progress &&
468 !list_empty(&adap->transmit_queue)),
469 msecs_to_jiffies(CEC_XFER_TIMEOUT_MS));
472 /* Otherwise we just wait for something to happen. */
473 wait_event_interruptible(adap->kthread_waitq,
474 kthread_should_stop() ||
475 (!adap->transmit_in_progress &&
476 !list_empty(&adap->transmit_queue)));
479 mutex_lock(&adap->lock);
481 if ((adap->needs_hpd &&
482 (!adap->is_configured && !adap->is_configuring)) ||
483 kthread_should_stop()) {
488 if (adap->transmit_in_progress && timeout) {
490 * If we timeout, then log that. Normally this does
491 * not happen and it is an indication of a faulty CEC
492 * adapter driver, or the CEC bus is in some weird
493 * state. On rare occasions it can happen if there is
494 * so much traffic on the bus that the adapter was
495 * unable to transmit for CEC_XFER_TIMEOUT_MS (2.1s).
497 if (adap->transmitting) {
498 pr_warn("cec-%s: message %*ph timed out\n", adap->name,
499 adap->transmitting->msg.len,
500 adap->transmitting->msg.msg);
501 /* Just give up on this. */
502 cec_data_cancel(adap->transmitting,
503 CEC_TX_STATUS_TIMEOUT);
505 pr_warn("cec-%s: transmit timed out\n", adap->name);
507 adap->transmit_in_progress = false;
513 * If we are still transmitting, or there is nothing new to
514 * transmit, then just continue waiting.
516 if (adap->transmit_in_progress || list_empty(&adap->transmit_queue))
519 /* Get a new message to transmit */
520 data = list_first_entry(&adap->transmit_queue,
521 struct cec_data, list);
522 list_del_init(&data->list);
523 if (!WARN_ON(!data->adap->transmit_queue_sz))
524 adap->transmit_queue_sz--;
526 /* Make this the current transmitting message */
527 adap->transmitting = data;
530 * Suggested number of attempts as per the CEC 2.0 spec:
531 * 4 attempts is the default, except for 'secondary poll
532 * messages', i.e. poll messages not sent during the adapter
533 * configuration phase when it allocates logical addresses.
535 if (data->msg.len == 1 && adap->is_configured)
540 /* Set the suggested signal free time */
541 if (data->attempts) {
542 /* should be >= 3 data bit periods for a retry */
543 signal_free_time = CEC_SIGNAL_FREE_TIME_RETRY;
544 } else if (adap->last_initiator !=
545 cec_msg_initiator(&data->msg)) {
546 /* should be >= 5 data bit periods for new initiator */
547 signal_free_time = CEC_SIGNAL_FREE_TIME_NEW_INITIATOR;
548 adap->last_initiator = cec_msg_initiator(&data->msg);
551 * should be >= 7 data bit periods for sending another
552 * frame immediately after another.
554 signal_free_time = CEC_SIGNAL_FREE_TIME_NEXT_XFER;
556 if (data->attempts == 0)
557 data->attempts = attempts;
559 /* Tell the adapter to transmit, cancel on error */
560 if (adap->ops->adap_transmit(adap, data->attempts,
561 signal_free_time, &data->msg))
562 cec_data_cancel(data, CEC_TX_STATUS_ABORTED);
564 adap->transmit_in_progress = true;
567 mutex_unlock(&adap->lock);
569 if (kthread_should_stop())
576 * Called by the CEC adapter if a transmit finished.
578 void cec_transmit_done_ts(struct cec_adapter *adap, u8 status,
579 u8 arb_lost_cnt, u8 nack_cnt, u8 low_drive_cnt,
580 u8 error_cnt, ktime_t ts)
582 struct cec_data *data;
584 unsigned int attempts_made = arb_lost_cnt + nack_cnt +
585 low_drive_cnt + error_cnt;
587 dprintk(2, "%s: status 0x%02x\n", __func__, status);
588 if (attempts_made < 1)
591 mutex_lock(&adap->lock);
592 data = adap->transmitting;
595 * This might happen if a transmit was issued and the cable is
596 * unplugged while the transmit is ongoing. Ignore this
597 * transmit in that case.
599 if (!adap->transmit_in_progress)
600 dprintk(1, "%s was called without an ongoing transmit!\n",
602 adap->transmit_in_progress = false;
605 adap->transmit_in_progress = false;
609 /* Drivers must fill in the status! */
610 WARN_ON(status == 0);
611 msg->tx_ts = ktime_to_ns(ts);
612 msg->tx_status |= status;
613 msg->tx_arb_lost_cnt += arb_lost_cnt;
614 msg->tx_nack_cnt += nack_cnt;
615 msg->tx_low_drive_cnt += low_drive_cnt;
616 msg->tx_error_cnt += error_cnt;
618 /* Mark that we're done with this transmit */
619 adap->transmitting = NULL;
622 * If there are still retry attempts left and there was an error and
623 * the hardware didn't signal that it retried itself (by setting
624 * CEC_TX_STATUS_MAX_RETRIES), then we will retry ourselves.
626 if (data->attempts > attempts_made &&
627 !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) {
628 /* Retry this message */
629 data->attempts -= attempts_made;
631 dprintk(2, "retransmit: %*ph (attempts: %d, wait for 0x%02x)\n",
632 msg->len, msg->msg, data->attempts, msg->reply);
634 dprintk(2, "retransmit: %*ph (attempts: %d)\n",
635 msg->len, msg->msg, data->attempts);
636 /* Add the message in front of the transmit queue */
637 list_add(&data->list, &adap->transmit_queue);
638 adap->transmit_queue_sz++;
644 /* Always set CEC_TX_STATUS_MAX_RETRIES on error */
645 if (!(status & CEC_TX_STATUS_OK))
646 msg->tx_status |= CEC_TX_STATUS_MAX_RETRIES;
648 /* Queue transmitted message for monitoring purposes */
649 cec_queue_msg_monitor(adap, msg, 1);
651 if ((status & CEC_TX_STATUS_OK) && adap->is_configured &&
654 * Queue the message into the wait queue if we want to wait
657 list_add_tail(&data->list, &adap->wait_queue);
658 schedule_delayed_work(&data->work,
659 msecs_to_jiffies(msg->timeout));
661 /* Otherwise we're done */
662 cec_data_completed(data);
667 * Wake up the main thread to see if another message is ready
668 * for transmitting or to retry the current message.
670 wake_up_interruptible(&adap->kthread_waitq);
671 mutex_unlock(&adap->lock);
673 EXPORT_SYMBOL_GPL(cec_transmit_done_ts);
675 void cec_transmit_attempt_done_ts(struct cec_adapter *adap,
676 u8 status, ktime_t ts)
678 switch (status & ~CEC_TX_STATUS_MAX_RETRIES) {
679 case CEC_TX_STATUS_OK:
680 cec_transmit_done_ts(adap, status, 0, 0, 0, 0, ts);
682 case CEC_TX_STATUS_ARB_LOST:
683 cec_transmit_done_ts(adap, status, 1, 0, 0, 0, ts);
685 case CEC_TX_STATUS_NACK:
686 cec_transmit_done_ts(adap, status, 0, 1, 0, 0, ts);
688 case CEC_TX_STATUS_LOW_DRIVE:
689 cec_transmit_done_ts(adap, status, 0, 0, 1, 0, ts);
691 case CEC_TX_STATUS_ERROR:
692 cec_transmit_done_ts(adap, status, 0, 0, 0, 1, ts);
695 /* Should never happen */
696 WARN(1, "cec-%s: invalid status 0x%02x\n", adap->name, status);
700 EXPORT_SYMBOL_GPL(cec_transmit_attempt_done_ts);
703 * Called when waiting for a reply times out.
705 static void cec_wait_timeout(struct work_struct *work)
707 struct cec_data *data = container_of(work, struct cec_data, work.work);
708 struct cec_adapter *adap = data->adap;
710 mutex_lock(&adap->lock);
712 * Sanity check in case the timeout and the arrival of the message
713 * happened at the same time.
715 if (list_empty(&data->list))
718 /* Mark the message as timed out */
719 list_del_init(&data->list);
720 data->msg.rx_ts = ktime_get_ns();
721 data->msg.rx_status = CEC_RX_STATUS_TIMEOUT;
722 cec_data_completed(data);
724 mutex_unlock(&adap->lock);
728 * Transmit a message. The fh argument may be NULL if the transmit is not
729 * associated with a specific filehandle.
731 * This function is called with adap->lock held.
733 int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
734 struct cec_fh *fh, bool block)
736 struct cec_data *data;
742 msg->tx_arb_lost_cnt = 0;
743 msg->tx_nack_cnt = 0;
744 msg->tx_low_drive_cnt = 0;
745 msg->tx_error_cnt = 0;
748 if (msg->reply && msg->timeout == 0) {
749 /* Make sure the timeout isn't 0. */
753 msg->flags &= CEC_MSG_FL_REPLY_TO_FOLLOWERS;
757 if (msg->len > 1 && msg->msg[1] == CEC_MSG_CDC_MESSAGE) {
758 msg->msg[2] = adap->phys_addr >> 8;
759 msg->msg[3] = adap->phys_addr & 0xff;
763 if (msg->len == 0 || msg->len > CEC_MAX_MSG_SIZE) {
764 dprintk(1, "%s: invalid length %d\n", __func__, msg->len);
768 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
771 dprintk(2, "%s: %*ph (wait for 0x%02x%s)\n",
772 __func__, msg->len, msg->msg, msg->reply,
773 !block ? ", nb" : "");
775 dprintk(2, "%s: %*ph%s\n",
776 __func__, msg->len, msg->msg, !block ? " (nb)" : "");
778 if (msg->timeout && msg->len == 1) {
779 dprintk(1, "%s: can't reply to poll msg\n", __func__);
783 if (cec_msg_destination(msg) == 0xf) {
784 dprintk(1, "%s: invalid poll message\n", __func__);
787 if (cec_has_log_addr(adap, cec_msg_destination(msg))) {
789 * If the destination is a logical address our adapter
790 * has already claimed, then just NACK this.
791 * It depends on the hardware what it will do with a
792 * POLL to itself (some OK this), so it is just as
793 * easy to handle it here so the behavior will be
796 msg->tx_ts = ktime_get_ns();
797 msg->tx_status = CEC_TX_STATUS_NACK |
798 CEC_TX_STATUS_MAX_RETRIES;
799 msg->tx_nack_cnt = 1;
800 msg->sequence = ++adap->sequence;
802 msg->sequence = ++adap->sequence;
806 if (msg->len > 1 && !cec_msg_is_broadcast(msg) &&
807 cec_has_log_addr(adap, cec_msg_destination(msg))) {
808 dprintk(1, "%s: destination is the adapter itself\n", __func__);
811 if (msg->len > 1 && adap->is_configured &&
812 !cec_has_log_addr(adap, cec_msg_initiator(msg))) {
813 dprintk(1, "%s: initiator has unknown logical address %d\n",
814 __func__, cec_msg_initiator(msg));
817 if (!adap->is_configured && !adap->is_configuring) {
818 if (adap->needs_hpd || msg->msg[0] != 0xf0) {
819 dprintk(1, "%s: adapter is unconfigured\n", __func__);
823 dprintk(1, "%s: invalid msg->reply\n", __func__);
828 if (adap->transmit_queue_sz >= CEC_MAX_MSG_TX_QUEUE_SZ) {
829 dprintk(1, "%s: transmit queue full\n", __func__);
833 data = kzalloc(sizeof(*data), GFP_KERNEL);
837 msg->sequence = ++adap->sequence;
839 msg->sequence = ++adap->sequence;
844 data->blocking = block;
846 init_completion(&data->c);
847 INIT_DELAYED_WORK(&data->work, cec_wait_timeout);
850 list_add_tail(&data->xfer_list, &fh->xfer_list);
852 list_add_tail(&data->list, &adap->transmit_queue);
853 adap->transmit_queue_sz++;
854 if (!adap->transmitting)
855 wake_up_interruptible(&adap->kthread_waitq);
857 /* All done if we don't need to block waiting for completion */
862 * Release the lock and wait, retake the lock afterwards.
864 mutex_unlock(&adap->lock);
865 wait_for_completion_killable(&data->c);
866 if (!data->completed)
867 cancel_delayed_work_sync(&data->work);
868 mutex_lock(&adap->lock);
870 /* Cancel the transmit if it was interrupted */
871 if (!data->completed)
872 cec_data_cancel(data, CEC_TX_STATUS_ABORTED);
874 /* The transmit completed (possibly with an error) */
880 /* Helper function to be used by drivers and this framework. */
881 int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
886 mutex_lock(&adap->lock);
887 ret = cec_transmit_msg_fh(adap, msg, NULL, block);
888 mutex_unlock(&adap->lock);
891 EXPORT_SYMBOL_GPL(cec_transmit_msg);
894 * I don't like forward references but without this the low-level
895 * cec_received_msg() function would come after a bunch of high-level
896 * CEC protocol handling functions. That was very confusing.
898 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
901 #define DIRECTED 0x80
902 #define BCAST1_4 0x40
903 #define BCAST2_0 0x20 /* broadcast only allowed for >= 2.0 */
904 #define BCAST (BCAST1_4 | BCAST2_0)
905 #define BOTH (BCAST | DIRECTED)
908 * Specify minimum length and whether the message is directed, broadcast
909 * or both. Messages that do not match the criteria are ignored as per
910 * the CEC specification.
912 static const u8 cec_msg_size[256] = {
913 [CEC_MSG_ACTIVE_SOURCE] = 4 | BCAST,
914 [CEC_MSG_IMAGE_VIEW_ON] = 2 | DIRECTED,
915 [CEC_MSG_TEXT_VIEW_ON] = 2 | DIRECTED,
916 [CEC_MSG_INACTIVE_SOURCE] = 4 | DIRECTED,
917 [CEC_MSG_REQUEST_ACTIVE_SOURCE] = 2 | BCAST,
918 [CEC_MSG_ROUTING_CHANGE] = 6 | BCAST,
919 [CEC_MSG_ROUTING_INFORMATION] = 4 | BCAST,
920 [CEC_MSG_SET_STREAM_PATH] = 4 | BCAST,
921 [CEC_MSG_STANDBY] = 2 | BOTH,
922 [CEC_MSG_RECORD_OFF] = 2 | DIRECTED,
923 [CEC_MSG_RECORD_ON] = 3 | DIRECTED,
924 [CEC_MSG_RECORD_STATUS] = 3 | DIRECTED,
925 [CEC_MSG_RECORD_TV_SCREEN] = 2 | DIRECTED,
926 [CEC_MSG_CLEAR_ANALOGUE_TIMER] = 13 | DIRECTED,
927 [CEC_MSG_CLEAR_DIGITAL_TIMER] = 16 | DIRECTED,
928 [CEC_MSG_CLEAR_EXT_TIMER] = 13 | DIRECTED,
929 [CEC_MSG_SET_ANALOGUE_TIMER] = 13 | DIRECTED,
930 [CEC_MSG_SET_DIGITAL_TIMER] = 16 | DIRECTED,
931 [CEC_MSG_SET_EXT_TIMER] = 13 | DIRECTED,
932 [CEC_MSG_SET_TIMER_PROGRAM_TITLE] = 2 | DIRECTED,
933 [CEC_MSG_TIMER_CLEARED_STATUS] = 3 | DIRECTED,
934 [CEC_MSG_TIMER_STATUS] = 3 | DIRECTED,
935 [CEC_MSG_CEC_VERSION] = 3 | DIRECTED,
936 [CEC_MSG_GET_CEC_VERSION] = 2 | DIRECTED,
937 [CEC_MSG_GIVE_PHYSICAL_ADDR] = 2 | DIRECTED,
938 [CEC_MSG_GET_MENU_LANGUAGE] = 2 | DIRECTED,
939 [CEC_MSG_REPORT_PHYSICAL_ADDR] = 5 | BCAST,
940 [CEC_MSG_SET_MENU_LANGUAGE] = 5 | BCAST,
941 [CEC_MSG_REPORT_FEATURES] = 6 | BCAST,
942 [CEC_MSG_GIVE_FEATURES] = 2 | DIRECTED,
943 [CEC_MSG_DECK_CONTROL] = 3 | DIRECTED,
944 [CEC_MSG_DECK_STATUS] = 3 | DIRECTED,
945 [CEC_MSG_GIVE_DECK_STATUS] = 3 | DIRECTED,
946 [CEC_MSG_PLAY] = 3 | DIRECTED,
947 [CEC_MSG_GIVE_TUNER_DEVICE_STATUS] = 3 | DIRECTED,
948 [CEC_MSG_SELECT_ANALOGUE_SERVICE] = 6 | DIRECTED,
949 [CEC_MSG_SELECT_DIGITAL_SERVICE] = 9 | DIRECTED,
950 [CEC_MSG_TUNER_DEVICE_STATUS] = 7 | DIRECTED,
951 [CEC_MSG_TUNER_STEP_DECREMENT] = 2 | DIRECTED,
952 [CEC_MSG_TUNER_STEP_INCREMENT] = 2 | DIRECTED,
953 [CEC_MSG_DEVICE_VENDOR_ID] = 5 | BCAST,
954 [CEC_MSG_GIVE_DEVICE_VENDOR_ID] = 2 | DIRECTED,
955 [CEC_MSG_VENDOR_COMMAND] = 2 | DIRECTED,
956 [CEC_MSG_VENDOR_COMMAND_WITH_ID] = 5 | BOTH,
957 [CEC_MSG_VENDOR_REMOTE_BUTTON_DOWN] = 2 | BOTH,
958 [CEC_MSG_VENDOR_REMOTE_BUTTON_UP] = 2 | BOTH,
959 [CEC_MSG_SET_OSD_STRING] = 3 | DIRECTED,
960 [CEC_MSG_GIVE_OSD_NAME] = 2 | DIRECTED,
961 [CEC_MSG_SET_OSD_NAME] = 2 | DIRECTED,
962 [CEC_MSG_MENU_REQUEST] = 3 | DIRECTED,
963 [CEC_MSG_MENU_STATUS] = 3 | DIRECTED,
964 [CEC_MSG_USER_CONTROL_PRESSED] = 3 | DIRECTED,
965 [CEC_MSG_USER_CONTROL_RELEASED] = 2 | DIRECTED,
966 [CEC_MSG_GIVE_DEVICE_POWER_STATUS] = 2 | DIRECTED,
967 [CEC_MSG_REPORT_POWER_STATUS] = 3 | DIRECTED | BCAST2_0,
968 [CEC_MSG_FEATURE_ABORT] = 4 | DIRECTED,
969 [CEC_MSG_ABORT] = 2 | DIRECTED,
970 [CEC_MSG_GIVE_AUDIO_STATUS] = 2 | DIRECTED,
971 [CEC_MSG_GIVE_SYSTEM_AUDIO_MODE_STATUS] = 2 | DIRECTED,
972 [CEC_MSG_REPORT_AUDIO_STATUS] = 3 | DIRECTED,
973 [CEC_MSG_REPORT_SHORT_AUDIO_DESCRIPTOR] = 2 | DIRECTED,
974 [CEC_MSG_REQUEST_SHORT_AUDIO_DESCRIPTOR] = 2 | DIRECTED,
975 [CEC_MSG_SET_SYSTEM_AUDIO_MODE] = 3 | BOTH,
976 [CEC_MSG_SYSTEM_AUDIO_MODE_REQUEST] = 2 | DIRECTED,
977 [CEC_MSG_SYSTEM_AUDIO_MODE_STATUS] = 3 | DIRECTED,
978 [CEC_MSG_SET_AUDIO_RATE] = 3 | DIRECTED,
979 [CEC_MSG_INITIATE_ARC] = 2 | DIRECTED,
980 [CEC_MSG_REPORT_ARC_INITIATED] = 2 | DIRECTED,
981 [CEC_MSG_REPORT_ARC_TERMINATED] = 2 | DIRECTED,
982 [CEC_MSG_REQUEST_ARC_INITIATION] = 2 | DIRECTED,
983 [CEC_MSG_REQUEST_ARC_TERMINATION] = 2 | DIRECTED,
984 [CEC_MSG_TERMINATE_ARC] = 2 | DIRECTED,
985 [CEC_MSG_REQUEST_CURRENT_LATENCY] = 4 | BCAST,
986 [CEC_MSG_REPORT_CURRENT_LATENCY] = 6 | BCAST,
987 [CEC_MSG_CDC_MESSAGE] = 2 | BCAST,
990 /* Called by the CEC adapter if a message is received */
991 void cec_received_msg_ts(struct cec_adapter *adap,
992 struct cec_msg *msg, ktime_t ts)
994 struct cec_data *data;
995 u8 msg_init = cec_msg_initiator(msg);
996 u8 msg_dest = cec_msg_destination(msg);
997 u8 cmd = msg->msg[1];
998 bool is_reply = false;
999 bool valid_la = true;
1002 if (WARN_ON(!msg->len || msg->len > CEC_MAX_MSG_SIZE))
1006 * Some CEC adapters will receive the messages that they transmitted.
1007 * This test filters out those messages by checking if we are the
1008 * initiator, and just returning in that case.
1010 * Note that this won't work if this is an Unregistered device.
1012 * It is bad practice if the hardware receives the message that it
1013 * transmitted and luckily most CEC adapters behave correctly in this
1016 if (msg_init != CEC_LOG_ADDR_UNREGISTERED &&
1017 cec_has_log_addr(adap, msg_init))
1020 msg->rx_ts = ktime_to_ns(ts);
1021 msg->rx_status = CEC_RX_STATUS_OK;
1022 msg->sequence = msg->reply = msg->timeout = 0;
1025 msg->tx_arb_lost_cnt = 0;
1026 msg->tx_nack_cnt = 0;
1027 msg->tx_low_drive_cnt = 0;
1028 msg->tx_error_cnt = 0;
1030 memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
1032 mutex_lock(&adap->lock);
1033 dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
1035 adap->last_initiator = 0xff;
1037 /* Check if this message was for us (directed or broadcast). */
1038 if (!cec_msg_is_broadcast(msg))
1039 valid_la = cec_has_log_addr(adap, msg_dest);
1042 * Check if the length is not too short or if the message is a
1043 * broadcast message where a directed message was expected or
1044 * vice versa. If so, then the message has to be ignored (according
1045 * to section CEC 7.3 and CEC 12.2).
1047 if (valid_la && msg->len > 1 && cec_msg_size[cmd]) {
1048 u8 dir_fl = cec_msg_size[cmd] & BOTH;
1050 min_len = cec_msg_size[cmd] & 0x1f;
1051 if (msg->len < min_len)
1053 else if (!cec_msg_is_broadcast(msg) && !(dir_fl & DIRECTED))
1055 else if (cec_msg_is_broadcast(msg) && !(dir_fl & BCAST))
1057 else if (cec_msg_is_broadcast(msg) &&
1058 adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0 &&
1059 !(dir_fl & BCAST1_4))
1062 if (valid_la && min_len) {
1063 /* These messages have special length requirements */
1065 case CEC_MSG_TIMER_STATUS:
1066 if (msg->msg[2] & 0x10) {
1067 switch (msg->msg[2] & 0xf) {
1068 case CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE:
1069 case CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE:
1074 } else if ((msg->msg[2] & 0xf) == CEC_OP_PROG_ERROR_DUPLICATE) {
1079 case CEC_MSG_RECORD_ON:
1080 switch (msg->msg[2]) {
1081 case CEC_OP_RECORD_SRC_OWN:
1083 case CEC_OP_RECORD_SRC_DIGITAL:
1087 case CEC_OP_RECORD_SRC_ANALOG:
1091 case CEC_OP_RECORD_SRC_EXT_PLUG:
1095 case CEC_OP_RECORD_SRC_EXT_PHYS_ADDR:
1104 /* It's a valid message and not a poll or CDC message */
1105 if (valid_la && msg->len > 1 && cmd != CEC_MSG_CDC_MESSAGE) {
1106 bool abort = cmd == CEC_MSG_FEATURE_ABORT;
1108 /* The aborted command is in msg[2] */
1113 * Walk over all transmitted messages that are waiting for a
1116 list_for_each_entry(data, &adap->wait_queue, list) {
1117 struct cec_msg *dst = &data->msg;
1120 * The *only* CEC message that has two possible replies
1121 * is CEC_MSG_INITIATE_ARC.
1122 * In this case allow either of the two replies.
1124 if (!abort && dst->msg[1] == CEC_MSG_INITIATE_ARC &&
1125 (cmd == CEC_MSG_REPORT_ARC_INITIATED ||
1126 cmd == CEC_MSG_REPORT_ARC_TERMINATED) &&
1127 (dst->reply == CEC_MSG_REPORT_ARC_INITIATED ||
1128 dst->reply == CEC_MSG_REPORT_ARC_TERMINATED))
1131 /* Does the command match? */
1132 if ((abort && cmd != dst->msg[1]) ||
1133 (!abort && cmd != dst->reply))
1136 /* Does the addressing match? */
1137 if (msg_init != cec_msg_destination(dst) &&
1138 !cec_msg_is_broadcast(dst))
1141 /* We got a reply */
1142 memcpy(dst->msg, msg->msg, msg->len);
1143 dst->len = msg->len;
1144 dst->rx_ts = msg->rx_ts;
1145 dst->rx_status = msg->rx_status;
1147 dst->rx_status |= CEC_RX_STATUS_FEATURE_ABORT;
1148 msg->flags = dst->flags;
1149 msg->sequence = dst->sequence;
1150 /* Remove it from the wait_queue */
1151 list_del_init(&data->list);
1153 /* Cancel the pending timeout work */
1154 if (!cancel_delayed_work(&data->work)) {
1155 mutex_unlock(&adap->lock);
1156 flush_scheduled_work();
1157 mutex_lock(&adap->lock);
1160 * Mark this as a reply, provided someone is still
1161 * waiting for the answer.
1165 cec_data_completed(data);
1169 mutex_unlock(&adap->lock);
1171 /* Pass the message on to any monitoring filehandles */
1172 cec_queue_msg_monitor(adap, msg, valid_la);
1174 /* We're done if it is not for us or a poll message */
1175 if (!valid_la || msg->len <= 1)
1178 if (adap->log_addrs.log_addr_mask == 0)
1182 * Process the message on the protocol level. If is_reply is true,
1183 * then cec_receive_notify() won't pass on the reply to the listener(s)
1184 * since that was already done by cec_data_completed() above.
1186 cec_receive_notify(adap, msg, is_reply);
1188 EXPORT_SYMBOL_GPL(cec_received_msg_ts);
1190 /* Logical Address Handling */
1193 * Attempt to claim a specific logical address.
1195 * This function is called with adap->lock held.
1197 static int cec_config_log_addr(struct cec_adapter *adap,
1199 unsigned int log_addr)
1201 struct cec_log_addrs *las = &adap->log_addrs;
1202 struct cec_msg msg = { };
1203 const unsigned int max_retries = 2;
1207 if (cec_has_log_addr(adap, log_addr))
1210 /* Send poll message */
1212 msg.msg[0] = (log_addr << 4) | log_addr;
1214 for (i = 0; i < max_retries; i++) {
1215 err = cec_transmit_msg_fh(adap, &msg, NULL, true);
1218 * While trying to poll the physical address was reset
1219 * and the adapter was unconfigured, so bail out.
1221 if (adap->phys_addr == CEC_PHYS_ADDR_INVALID)
1228 * The message was aborted due to a disconnect or
1229 * unconfigure, just bail out.
1231 if (msg.tx_status & CEC_TX_STATUS_ABORTED)
1233 if (msg.tx_status & CEC_TX_STATUS_OK)
1235 if (msg.tx_status & CEC_TX_STATUS_NACK)
1238 * Retry up to max_retries times if the message was neither
1239 * OKed or NACKed. This can happen due to e.g. a Lost
1240 * Arbitration condition.
1245 * If we are unable to get an OK or a NACK after max_retries attempts
1246 * (and note that each attempt already consists of four polls), then
1247 * then we assume that something is really weird and that it is not a
1248 * good idea to try and claim this logical address.
1250 if (i == max_retries)
1254 * Message not acknowledged, so this logical
1255 * address is free to use.
1257 err = adap->ops->adap_log_addr(adap, log_addr);
1261 las->log_addr[idx] = log_addr;
1262 las->log_addr_mask |= 1 << log_addr;
1263 adap->phys_addrs[log_addr] = adap->phys_addr;
1268 * Unconfigure the adapter: clear all logical addresses and send
1269 * the state changed event.
1271 * This function is called with adap->lock held.
1273 static void cec_adap_unconfigure(struct cec_adapter *adap)
1275 if (!adap->needs_hpd ||
1276 adap->phys_addr != CEC_PHYS_ADDR_INVALID)
1277 WARN_ON(adap->ops->adap_log_addr(adap, CEC_LOG_ADDR_INVALID));
1278 adap->log_addrs.log_addr_mask = 0;
1279 adap->is_configured = false;
1280 memset(adap->phys_addrs, 0xff, sizeof(adap->phys_addrs));
1282 wake_up_interruptible(&adap->kthread_waitq);
1283 cec_post_state_event(adap);
1287 * Attempt to claim the required logical addresses.
1289 static int cec_config_thread_func(void *arg)
1291 /* The various LAs for each type of device */
1292 static const u8 tv_log_addrs[] = {
1293 CEC_LOG_ADDR_TV, CEC_LOG_ADDR_SPECIFIC,
1294 CEC_LOG_ADDR_INVALID
1296 static const u8 record_log_addrs[] = {
1297 CEC_LOG_ADDR_RECORD_1, CEC_LOG_ADDR_RECORD_2,
1298 CEC_LOG_ADDR_RECORD_3,
1299 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1300 CEC_LOG_ADDR_INVALID
1302 static const u8 tuner_log_addrs[] = {
1303 CEC_LOG_ADDR_TUNER_1, CEC_LOG_ADDR_TUNER_2,
1304 CEC_LOG_ADDR_TUNER_3, CEC_LOG_ADDR_TUNER_4,
1305 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1306 CEC_LOG_ADDR_INVALID
1308 static const u8 playback_log_addrs[] = {
1309 CEC_LOG_ADDR_PLAYBACK_1, CEC_LOG_ADDR_PLAYBACK_2,
1310 CEC_LOG_ADDR_PLAYBACK_3,
1311 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1312 CEC_LOG_ADDR_INVALID
1314 static const u8 audiosystem_log_addrs[] = {
1315 CEC_LOG_ADDR_AUDIOSYSTEM,
1316 CEC_LOG_ADDR_INVALID
1318 static const u8 specific_use_log_addrs[] = {
1319 CEC_LOG_ADDR_SPECIFIC,
1320 CEC_LOG_ADDR_BACKUP_1, CEC_LOG_ADDR_BACKUP_2,
1321 CEC_LOG_ADDR_INVALID
1323 static const u8 *type2addrs[6] = {
1324 [CEC_LOG_ADDR_TYPE_TV] = tv_log_addrs,
1325 [CEC_LOG_ADDR_TYPE_RECORD] = record_log_addrs,
1326 [CEC_LOG_ADDR_TYPE_TUNER] = tuner_log_addrs,
1327 [CEC_LOG_ADDR_TYPE_PLAYBACK] = playback_log_addrs,
1328 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = audiosystem_log_addrs,
1329 [CEC_LOG_ADDR_TYPE_SPECIFIC] = specific_use_log_addrs,
1331 static const u16 type2mask[] = {
1332 [CEC_LOG_ADDR_TYPE_TV] = CEC_LOG_ADDR_MASK_TV,
1333 [CEC_LOG_ADDR_TYPE_RECORD] = CEC_LOG_ADDR_MASK_RECORD,
1334 [CEC_LOG_ADDR_TYPE_TUNER] = CEC_LOG_ADDR_MASK_TUNER,
1335 [CEC_LOG_ADDR_TYPE_PLAYBACK] = CEC_LOG_ADDR_MASK_PLAYBACK,
1336 [CEC_LOG_ADDR_TYPE_AUDIOSYSTEM] = CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
1337 [CEC_LOG_ADDR_TYPE_SPECIFIC] = CEC_LOG_ADDR_MASK_SPECIFIC,
1339 struct cec_adapter *adap = arg;
1340 struct cec_log_addrs *las = &adap->log_addrs;
1344 mutex_lock(&adap->lock);
1345 dprintk(1, "physical address: %x.%x.%x.%x, claim %d logical addresses\n",
1346 cec_phys_addr_exp(adap->phys_addr), las->num_log_addrs);
1347 las->log_addr_mask = 0;
1349 if (las->log_addr_type[0] == CEC_LOG_ADDR_TYPE_UNREGISTERED)
1352 for (i = 0; i < las->num_log_addrs; i++) {
1353 unsigned int type = las->log_addr_type[i];
1358 * The TV functionality can only map to physical address 0.
1359 * For any other address, try the Specific functionality
1360 * instead as per the spec.
1362 if (adap->phys_addr && type == CEC_LOG_ADDR_TYPE_TV)
1363 type = CEC_LOG_ADDR_TYPE_SPECIFIC;
1365 la_list = type2addrs[type];
1366 last_la = las->log_addr[i];
1367 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1368 if (last_la == CEC_LOG_ADDR_INVALID ||
1369 last_la == CEC_LOG_ADDR_UNREGISTERED ||
1370 !((1 << last_la) & type2mask[type]))
1371 last_la = la_list[0];
1373 err = cec_config_log_addr(adap, i, last_la);
1374 if (err > 0) /* Reused last LA */
1380 for (j = 0; la_list[j] != CEC_LOG_ADDR_INVALID; j++) {
1381 /* Tried this one already, skip it */
1382 if (la_list[j] == last_la)
1384 /* The backup addresses are CEC 2.0 specific */
1385 if ((la_list[j] == CEC_LOG_ADDR_BACKUP_1 ||
1386 la_list[j] == CEC_LOG_ADDR_BACKUP_2) &&
1387 las->cec_version < CEC_OP_CEC_VERSION_2_0)
1390 err = cec_config_log_addr(adap, i, la_list[j]);
1391 if (err == 0) /* LA is in use */
1395 /* Done, claimed an LA */
1399 if (la_list[j] == CEC_LOG_ADDR_INVALID)
1400 dprintk(1, "could not claim LA %d\n", i);
1403 if (adap->log_addrs.log_addr_mask == 0 &&
1404 !(las->flags & CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK))
1408 if (adap->log_addrs.log_addr_mask == 0) {
1409 /* Fall back to unregistered */
1410 las->log_addr[0] = CEC_LOG_ADDR_UNREGISTERED;
1411 las->log_addr_mask = 1 << las->log_addr[0];
1412 for (i = 1; i < las->num_log_addrs; i++)
1413 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1415 for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++)
1416 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1417 adap->is_configured = true;
1418 adap->is_configuring = false;
1419 cec_post_state_event(adap);
1422 * Now post the Report Features and Report Physical Address broadcast
1423 * messages. Note that these are non-blocking transmits, meaning that
1424 * they are just queued up and once adap->lock is unlocked the main
1425 * thread will kick in and start transmitting these.
1427 * If after this function is done (but before one or more of these
1428 * messages are actually transmitted) the CEC adapter is unconfigured,
1429 * then any remaining messages will be dropped by the main thread.
1431 for (i = 0; i < las->num_log_addrs; i++) {
1432 struct cec_msg msg = {};
1434 if (las->log_addr[i] == CEC_LOG_ADDR_INVALID ||
1435 (las->flags & CEC_LOG_ADDRS_FL_CDC_ONLY))
1438 msg.msg[0] = (las->log_addr[i] << 4) | 0x0f;
1440 /* Report Features must come first according to CEC 2.0 */
1441 if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED &&
1442 adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0) {
1443 cec_fill_msg_report_features(adap, &msg, i);
1444 cec_transmit_msg_fh(adap, &msg, NULL, false);
1447 /* Report Physical Address */
1448 cec_msg_report_physical_addr(&msg, adap->phys_addr,
1449 las->primary_device_type[i]);
1450 dprintk(1, "config: la %d pa %x.%x.%x.%x\n",
1452 cec_phys_addr_exp(adap->phys_addr));
1453 cec_transmit_msg_fh(adap, &msg, NULL, false);
1455 /* Report Vendor ID */
1456 if (adap->log_addrs.vendor_id != CEC_VENDOR_ID_NONE) {
1457 cec_msg_device_vendor_id(&msg,
1458 adap->log_addrs.vendor_id);
1459 cec_transmit_msg_fh(adap, &msg, NULL, false);
1462 adap->kthread_config = NULL;
1463 complete(&adap->config_completion);
1464 mutex_unlock(&adap->lock);
1468 for (i = 0; i < las->num_log_addrs; i++)
1469 las->log_addr[i] = CEC_LOG_ADDR_INVALID;
1470 cec_adap_unconfigure(adap);
1471 adap->is_configuring = false;
1472 adap->kthread_config = NULL;
1473 complete(&adap->config_completion);
1474 mutex_unlock(&adap->lock);
1479 * Called from either __cec_s_phys_addr or __cec_s_log_addrs to claim the
1480 * logical addresses.
1482 * This function is called with adap->lock held.
1484 static void cec_claim_log_addrs(struct cec_adapter *adap, bool block)
1486 if (WARN_ON(adap->is_configuring || adap->is_configured))
1489 init_completion(&adap->config_completion);
1491 /* Ready to kick off the thread */
1492 adap->is_configuring = true;
1493 adap->kthread_config = kthread_run(cec_config_thread_func, adap,
1494 "ceccfg-%s", adap->name);
1495 if (IS_ERR(adap->kthread_config)) {
1496 adap->kthread_config = NULL;
1498 mutex_unlock(&adap->lock);
1499 wait_for_completion(&adap->config_completion);
1500 mutex_lock(&adap->lock);
1504 /* Set a new physical address and send an event notifying userspace of this.
1506 * This function is called with adap->lock held.
1508 void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1510 if (phys_addr == adap->phys_addr)
1512 if (phys_addr != CEC_PHYS_ADDR_INVALID && adap->devnode.unregistered)
1515 dprintk(1, "new physical address %x.%x.%x.%x\n",
1516 cec_phys_addr_exp(phys_addr));
1517 if (phys_addr == CEC_PHYS_ADDR_INVALID ||
1518 adap->phys_addr != CEC_PHYS_ADDR_INVALID) {
1519 adap->phys_addr = CEC_PHYS_ADDR_INVALID;
1520 cec_post_state_event(adap);
1521 cec_adap_unconfigure(adap);
1522 /* Disabling monitor all mode should always succeed */
1523 if (adap->monitor_all_cnt)
1524 WARN_ON(call_op(adap, adap_monitor_all_enable, false));
1525 mutex_lock(&adap->devnode.lock);
1526 if (adap->needs_hpd || list_empty(&adap->devnode.fhs)) {
1527 WARN_ON(adap->ops->adap_enable(adap, false));
1528 adap->transmit_in_progress = false;
1529 wake_up_interruptible(&adap->kthread_waitq);
1531 mutex_unlock(&adap->devnode.lock);
1532 if (phys_addr == CEC_PHYS_ADDR_INVALID)
1536 mutex_lock(&adap->devnode.lock);
1537 adap->last_initiator = 0xff;
1538 adap->transmit_in_progress = false;
1540 if ((adap->needs_hpd || list_empty(&adap->devnode.fhs)) &&
1541 adap->ops->adap_enable(adap, true)) {
1542 mutex_unlock(&adap->devnode.lock);
1546 if (adap->monitor_all_cnt &&
1547 call_op(adap, adap_monitor_all_enable, true)) {
1548 if (adap->needs_hpd || list_empty(&adap->devnode.fhs))
1549 WARN_ON(adap->ops->adap_enable(adap, false));
1550 mutex_unlock(&adap->devnode.lock);
1553 mutex_unlock(&adap->devnode.lock);
1555 adap->phys_addr = phys_addr;
1556 cec_post_state_event(adap);
1557 if (adap->log_addrs.num_log_addrs)
1558 cec_claim_log_addrs(adap, block);
1561 void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block)
1563 if (IS_ERR_OR_NULL(adap))
1566 mutex_lock(&adap->lock);
1567 __cec_s_phys_addr(adap, phys_addr, block);
1568 mutex_unlock(&adap->lock);
1570 EXPORT_SYMBOL_GPL(cec_s_phys_addr);
1572 void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
1573 const struct edid *edid)
1575 u16 pa = CEC_PHYS_ADDR_INVALID;
1577 if (edid && edid->extensions)
1578 pa = cec_get_edid_phys_addr((const u8 *)edid,
1579 EDID_LENGTH * (edid->extensions + 1), NULL);
1580 cec_s_phys_addr(adap, pa, false);
1582 EXPORT_SYMBOL_GPL(cec_s_phys_addr_from_edid);
1585 * Called from either the ioctl or a driver to set the logical addresses.
1587 * This function is called with adap->lock held.
1589 int __cec_s_log_addrs(struct cec_adapter *adap,
1590 struct cec_log_addrs *log_addrs, bool block)
1595 if (adap->devnode.unregistered)
1598 if (!log_addrs || log_addrs->num_log_addrs == 0) {
1599 cec_adap_unconfigure(adap);
1600 adap->log_addrs.num_log_addrs = 0;
1601 for (i = 0; i < CEC_MAX_LOG_ADDRS; i++)
1602 adap->log_addrs.log_addr[i] = CEC_LOG_ADDR_INVALID;
1603 adap->log_addrs.osd_name[0] = '\0';
1604 adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
1605 adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
1609 if (log_addrs->flags & CEC_LOG_ADDRS_FL_CDC_ONLY) {
1611 * Sanitize log_addrs fields if a CDC-Only device is
1614 log_addrs->num_log_addrs = 1;
1615 log_addrs->osd_name[0] = '\0';
1616 log_addrs->vendor_id = CEC_VENDOR_ID_NONE;
1617 log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
1619 * This is just an internal convention since a CDC-Only device
1620 * doesn't have to be a switch. But switches already use
1621 * unregistered, so it makes some kind of sense to pick this
1622 * as the primary device. Since a CDC-Only device never sends
1623 * any 'normal' CEC messages this primary device type is never
1624 * sent over the CEC bus.
1626 log_addrs->primary_device_type[0] = CEC_OP_PRIM_DEVTYPE_SWITCH;
1627 log_addrs->all_device_types[0] = 0;
1628 log_addrs->features[0][0] = 0;
1629 log_addrs->features[0][1] = 0;
1632 /* Ensure the osd name is 0-terminated */
1633 log_addrs->osd_name[sizeof(log_addrs->osd_name) - 1] = '\0';
1636 if (log_addrs->num_log_addrs > adap->available_log_addrs) {
1637 dprintk(1, "num_log_addrs > %d\n", adap->available_log_addrs);
1642 * Vendor ID is a 24 bit number, so check if the value is
1643 * within the correct range.
1645 if (log_addrs->vendor_id != CEC_VENDOR_ID_NONE &&
1646 (log_addrs->vendor_id & 0xff000000) != 0) {
1647 dprintk(1, "invalid vendor ID\n");
1651 if (log_addrs->cec_version != CEC_OP_CEC_VERSION_1_4 &&
1652 log_addrs->cec_version != CEC_OP_CEC_VERSION_2_0) {
1653 dprintk(1, "invalid CEC version\n");
1657 if (log_addrs->num_log_addrs > 1)
1658 for (i = 0; i < log_addrs->num_log_addrs; i++)
1659 if (log_addrs->log_addr_type[i] ==
1660 CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1661 dprintk(1, "num_log_addrs > 1 can't be combined with unregistered LA\n");
1665 for (i = 0; i < log_addrs->num_log_addrs; i++) {
1666 const u8 feature_sz = ARRAY_SIZE(log_addrs->features[0]);
1667 u8 *features = log_addrs->features[i];
1668 bool op_is_dev_features = false;
1671 log_addrs->log_addr[i] = CEC_LOG_ADDR_INVALID;
1672 if (log_addrs->log_addr_type[i] > CEC_LOG_ADDR_TYPE_UNREGISTERED) {
1673 dprintk(1, "unknown logical address type\n");
1676 if (type_mask & (1 << log_addrs->log_addr_type[i])) {
1677 dprintk(1, "duplicate logical address type\n");
1680 type_mask |= 1 << log_addrs->log_addr_type[i];
1681 if ((type_mask & (1 << CEC_LOG_ADDR_TYPE_RECORD)) &&
1682 (type_mask & (1 << CEC_LOG_ADDR_TYPE_PLAYBACK))) {
1683 /* Record already contains the playback functionality */
1684 dprintk(1, "invalid record + playback combination\n");
1687 if (log_addrs->primary_device_type[i] >
1688 CEC_OP_PRIM_DEVTYPE_PROCESSOR) {
1689 dprintk(1, "unknown primary device type\n");
1692 if (log_addrs->primary_device_type[i] == 2) {
1693 dprintk(1, "invalid primary device type\n");
1696 for (j = 0; j < feature_sz; j++) {
1697 if ((features[j] & 0x80) == 0) {
1698 if (op_is_dev_features)
1700 op_is_dev_features = true;
1703 if (!op_is_dev_features || j == feature_sz) {
1704 dprintk(1, "malformed features\n");
1707 /* Zero unused part of the feature array */
1708 memset(features + j + 1, 0, feature_sz - j - 1);
1711 if (log_addrs->cec_version >= CEC_OP_CEC_VERSION_2_0) {
1712 if (log_addrs->num_log_addrs > 2) {
1713 dprintk(1, "CEC 2.0 allows no more than 2 logical addresses\n");
1716 if (log_addrs->num_log_addrs == 2) {
1717 if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_AUDIOSYSTEM) |
1718 (1 << CEC_LOG_ADDR_TYPE_TV)))) {
1719 dprintk(1, "two LAs is only allowed for audiosystem and TV\n");
1722 if (!(type_mask & ((1 << CEC_LOG_ADDR_TYPE_PLAYBACK) |
1723 (1 << CEC_LOG_ADDR_TYPE_RECORD)))) {
1724 dprintk(1, "an audiosystem/TV can only be combined with record or playback\n");
1730 /* Zero unused LAs */
1731 for (i = log_addrs->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++) {
1732 log_addrs->primary_device_type[i] = 0;
1733 log_addrs->log_addr_type[i] = 0;
1734 log_addrs->all_device_types[i] = 0;
1735 memset(log_addrs->features[i], 0,
1736 sizeof(log_addrs->features[i]));
1739 log_addrs->log_addr_mask = adap->log_addrs.log_addr_mask;
1740 adap->log_addrs = *log_addrs;
1741 if (adap->phys_addr != CEC_PHYS_ADDR_INVALID)
1742 cec_claim_log_addrs(adap, block);
1746 int cec_s_log_addrs(struct cec_adapter *adap,
1747 struct cec_log_addrs *log_addrs, bool block)
1751 mutex_lock(&adap->lock);
1752 err = __cec_s_log_addrs(adap, log_addrs, block);
1753 mutex_unlock(&adap->lock);
1756 EXPORT_SYMBOL_GPL(cec_s_log_addrs);
1758 /* High-level core CEC message handling */
1760 /* Fill in the Report Features message */
1761 static void cec_fill_msg_report_features(struct cec_adapter *adap,
1762 struct cec_msg *msg,
1763 unsigned int la_idx)
1765 const struct cec_log_addrs *las = &adap->log_addrs;
1766 const u8 *features = las->features[la_idx];
1767 bool op_is_dev_features = false;
1770 /* Report Features */
1771 msg->msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
1773 msg->msg[1] = CEC_MSG_REPORT_FEATURES;
1774 msg->msg[2] = adap->log_addrs.cec_version;
1775 msg->msg[3] = las->all_device_types[la_idx];
1777 /* Write RC Profiles first, then Device Features */
1778 for (idx = 0; idx < ARRAY_SIZE(las->features[0]); idx++) {
1779 msg->msg[msg->len++] = features[idx];
1780 if ((features[idx] & CEC_OP_FEAT_EXT) == 0) {
1781 if (op_is_dev_features)
1783 op_is_dev_features = true;
1788 /* Transmit the Feature Abort message */
1789 static int cec_feature_abort_reason(struct cec_adapter *adap,
1790 struct cec_msg *msg, u8 reason)
1792 struct cec_msg tx_msg = { };
1795 * Don't reply with CEC_MSG_FEATURE_ABORT to a CEC_MSG_FEATURE_ABORT
1798 if (msg->msg[1] == CEC_MSG_FEATURE_ABORT)
1800 /* Don't Feature Abort messages from 'Unregistered' */
1801 if (cec_msg_initiator(msg) == CEC_LOG_ADDR_UNREGISTERED)
1803 cec_msg_set_reply_to(&tx_msg, msg);
1804 cec_msg_feature_abort(&tx_msg, msg->msg[1], reason);
1805 return cec_transmit_msg(adap, &tx_msg, false);
1808 static int cec_feature_abort(struct cec_adapter *adap, struct cec_msg *msg)
1810 return cec_feature_abort_reason(adap, msg,
1811 CEC_OP_ABORT_UNRECOGNIZED_OP);
1814 static int cec_feature_refused(struct cec_adapter *adap, struct cec_msg *msg)
1816 return cec_feature_abort_reason(adap, msg,
1817 CEC_OP_ABORT_REFUSED);
1821 * Called when a CEC message is received. This function will do any
1822 * necessary core processing. The is_reply bool is true if this message
1823 * is a reply to an earlier transmit.
1825 * The message is either a broadcast message or a valid directed message.
1827 static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
1830 bool is_broadcast = cec_msg_is_broadcast(msg);
1831 u8 dest_laddr = cec_msg_destination(msg);
1832 u8 init_laddr = cec_msg_initiator(msg);
1833 u8 devtype = cec_log_addr2dev(adap, dest_laddr);
1834 int la_idx = cec_log_addr2idx(adap, dest_laddr);
1835 bool from_unregistered = init_laddr == 0xf;
1836 struct cec_msg tx_cec_msg = { };
1838 dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
1840 /* If this is a CDC-Only device, then ignore any non-CDC messages */
1841 if (cec_is_cdc_only(&adap->log_addrs) &&
1842 msg->msg[1] != CEC_MSG_CDC_MESSAGE)
1845 if (adap->ops->received) {
1846 /* Allow drivers to process the message first */
1847 if (adap->ops->received(adap, msg) != -ENOMSG)
1852 * REPORT_PHYSICAL_ADDR, CEC_MSG_USER_CONTROL_PRESSED and
1853 * CEC_MSG_USER_CONTROL_RELEASED messages always have to be
1854 * handled by the CEC core, even if the passthrough mode is on.
1855 * The others are just ignored if passthrough mode is on.
1857 switch (msg->msg[1]) {
1858 case CEC_MSG_GET_CEC_VERSION:
1860 case CEC_MSG_GIVE_DEVICE_POWER_STATUS:
1861 case CEC_MSG_GIVE_OSD_NAME:
1863 * These messages reply with a directed message, so ignore if
1864 * the initiator is Unregistered.
1866 if (!adap->passthrough && from_unregistered)
1869 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
1870 case CEC_MSG_GIVE_FEATURES:
1871 case CEC_MSG_GIVE_PHYSICAL_ADDR:
1873 * Skip processing these messages if the passthrough mode
1876 if (adap->passthrough)
1877 goto skip_processing;
1878 /* Ignore if addressing is wrong */
1883 case CEC_MSG_USER_CONTROL_PRESSED:
1884 case CEC_MSG_USER_CONTROL_RELEASED:
1885 /* Wrong addressing mode: don't process */
1886 if (is_broadcast || from_unregistered)
1887 goto skip_processing;
1890 case CEC_MSG_REPORT_PHYSICAL_ADDR:
1892 * This message is always processed, regardless of the
1893 * passthrough setting.
1895 * Exception: don't process if wrong addressing mode.
1898 goto skip_processing;
1905 cec_msg_set_reply_to(&tx_cec_msg, msg);
1907 switch (msg->msg[1]) {
1908 /* The following messages are processed but still passed through */
1909 case CEC_MSG_REPORT_PHYSICAL_ADDR: {
1910 u16 pa = (msg->msg[2] << 8) | msg->msg[3];
1912 if (!from_unregistered)
1913 adap->phys_addrs[init_laddr] = pa;
1914 dprintk(1, "reported physical address %x.%x.%x.%x for logical address %d\n",
1915 cec_phys_addr_exp(pa), init_laddr);
1919 case CEC_MSG_USER_CONTROL_PRESSED:
1920 if (!(adap->capabilities & CEC_CAP_RC) ||
1921 !(adap->log_addrs.flags & CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU))
1924 #ifdef CONFIG_MEDIA_CEC_RC
1925 switch (msg->msg[2]) {
1927 * Play function, this message can have variable length
1928 * depending on the specific play function that is used.
1932 rc_keydown(adap->rc, RC_PROTO_CEC,
1935 rc_keydown(adap->rc, RC_PROTO_CEC,
1936 msg->msg[2] << 8 | msg->msg[3], 0);
1939 * Other function messages that are not handled.
1940 * Currently the RC framework does not allow to supply an
1941 * additional parameter to a keypress. These "keys" contain
1942 * other information such as channel number, an input number
1944 * For the time being these messages are not processed by the
1945 * framework and are simply forwarded to the user space.
1947 case 0x56: case 0x57:
1948 case 0x67: case 0x68: case 0x69: case 0x6a:
1951 rc_keydown(adap->rc, RC_PROTO_CEC, msg->msg[2], 0);
1957 case CEC_MSG_USER_CONTROL_RELEASED:
1958 if (!(adap->capabilities & CEC_CAP_RC) ||
1959 !(adap->log_addrs.flags & CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU))
1961 #ifdef CONFIG_MEDIA_CEC_RC
1967 * The remaining messages are only processed if the passthrough mode
1970 case CEC_MSG_GET_CEC_VERSION:
1971 cec_msg_cec_version(&tx_cec_msg, adap->log_addrs.cec_version);
1972 return cec_transmit_msg(adap, &tx_cec_msg, false);
1974 case CEC_MSG_GIVE_PHYSICAL_ADDR:
1975 /* Do nothing for CEC switches using addr 15 */
1976 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH && dest_laddr == 15)
1978 cec_msg_report_physical_addr(&tx_cec_msg, adap->phys_addr, devtype);
1979 return cec_transmit_msg(adap, &tx_cec_msg, false);
1981 case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
1982 if (adap->log_addrs.vendor_id == CEC_VENDOR_ID_NONE)
1983 return cec_feature_abort(adap, msg);
1984 cec_msg_device_vendor_id(&tx_cec_msg, adap->log_addrs.vendor_id);
1985 return cec_transmit_msg(adap, &tx_cec_msg, false);
1988 /* Do nothing for CEC switches */
1989 if (devtype == CEC_OP_PRIM_DEVTYPE_SWITCH)
1991 return cec_feature_refused(adap, msg);
1993 case CEC_MSG_GIVE_OSD_NAME: {
1994 if (adap->log_addrs.osd_name[0] == 0)
1995 return cec_feature_abort(adap, msg);
1996 cec_msg_set_osd_name(&tx_cec_msg, adap->log_addrs.osd_name);
1997 return cec_transmit_msg(adap, &tx_cec_msg, false);
2000 case CEC_MSG_GIVE_FEATURES:
2001 if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
2002 return cec_feature_abort(adap, msg);
2003 cec_fill_msg_report_features(adap, &tx_cec_msg, la_idx);
2004 return cec_transmit_msg(adap, &tx_cec_msg, false);
2008 * Unprocessed messages are aborted if userspace isn't doing
2009 * any processing either.
2011 if (!is_broadcast && !is_reply && !adap->follower_cnt &&
2012 !adap->cec_follower && msg->msg[1] != CEC_MSG_FEATURE_ABORT)
2013 return cec_feature_abort(adap, msg);
2018 /* If this was a reply, then we're done, unless otherwise specified */
2019 if (is_reply && !(msg->flags & CEC_MSG_FL_REPLY_TO_FOLLOWERS))
2023 * Send to the exclusive follower if there is one, otherwise send
2026 if (adap->cec_follower)
2027 cec_queue_msg_fh(adap->cec_follower, msg);
2029 cec_queue_msg_followers(adap, msg);
2034 * Helper functions to keep track of the 'monitor all' use count.
2036 * These functions are called with adap->lock held.
2038 int cec_monitor_all_cnt_inc(struct cec_adapter *adap)
2042 if (adap->monitor_all_cnt == 0)
2043 ret = call_op(adap, adap_monitor_all_enable, 1);
2045 adap->monitor_all_cnt++;
2049 void cec_monitor_all_cnt_dec(struct cec_adapter *adap)
2051 adap->monitor_all_cnt--;
2052 if (adap->monitor_all_cnt == 0)
2053 WARN_ON(call_op(adap, adap_monitor_all_enable, 0));
2057 * Helper functions to keep track of the 'monitor pin' use count.
2059 * These functions are called with adap->lock held.
2061 int cec_monitor_pin_cnt_inc(struct cec_adapter *adap)
2065 if (adap->monitor_pin_cnt == 0)
2066 ret = call_op(adap, adap_monitor_pin_enable, 1);
2068 adap->monitor_pin_cnt++;
2072 void cec_monitor_pin_cnt_dec(struct cec_adapter *adap)
2074 adap->monitor_pin_cnt--;
2075 if (adap->monitor_pin_cnt == 0)
2076 WARN_ON(call_op(adap, adap_monitor_pin_enable, 0));
2079 #ifdef CONFIG_DEBUG_FS
2081 * Log the current state of the CEC adapter.
2082 * Very useful for debugging.
2084 int cec_adap_status(struct seq_file *file, void *priv)
2086 struct cec_adapter *adap = dev_get_drvdata(file->private);
2087 struct cec_data *data;
2089 mutex_lock(&adap->lock);
2090 seq_printf(file, "configured: %d\n", adap->is_configured);
2091 seq_printf(file, "configuring: %d\n", adap->is_configuring);
2092 seq_printf(file, "phys_addr: %x.%x.%x.%x\n",
2093 cec_phys_addr_exp(adap->phys_addr));
2094 seq_printf(file, "number of LAs: %d\n", adap->log_addrs.num_log_addrs);
2095 seq_printf(file, "LA mask: 0x%04x\n", adap->log_addrs.log_addr_mask);
2096 if (adap->cec_follower)
2097 seq_printf(file, "has CEC follower%s\n",
2098 adap->passthrough ? " (in passthrough mode)" : "");
2099 if (adap->cec_initiator)
2100 seq_puts(file, "has CEC initiator\n");
2101 if (adap->monitor_all_cnt)
2102 seq_printf(file, "file handles in Monitor All mode: %u\n",
2103 adap->monitor_all_cnt);
2104 if (adap->tx_timeouts) {
2105 seq_printf(file, "transmit timeouts: %u\n",
2107 adap->tx_timeouts = 0;
2109 data = adap->transmitting;
2111 seq_printf(file, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n",
2112 data->msg.len, data->msg.msg, data->msg.reply,
2114 seq_printf(file, "pending transmits: %u\n", adap->transmit_queue_sz);
2115 list_for_each_entry(data, &adap->transmit_queue, list) {
2116 seq_printf(file, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n",
2117 data->msg.len, data->msg.msg, data->msg.reply,
2120 list_for_each_entry(data, &adap->wait_queue, list) {
2121 seq_printf(file, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n",
2122 data->msg.len, data->msg.msg, data->msg.reply,
2126 call_void_op(adap, adap_status, file);
2127 mutex_unlock(&adap->lock);