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authorLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 18:59:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 18:59:59 -0700
commit9c1958fc326a0a0a533ec8e86ea6fa30977207de (patch)
tree9d76e6a146c2622fad0eefbb8ff0503caefe33cc /drivers/staging
parent1b3fc0bef8859268d542230172f80e85553fdab4 (diff)
parent009a620848218d521f008141c62f56bf19294dd9 (diff)
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Merge tag 'media/v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab: - new framework support for HDMI CEC and remote control support - new encoding codec driver for Mediatek SoC - new frontend driver: helene tuner - added support for NetUp almost universal devices, with supports DVB-C/S/S2/T/T2 and ISDB-T - the mn88472 frontend driver got promoted from staging - a new driver for RCar video input - some soc_camera legacy drivers got removed: timb, omap1, mx2, mx3 - lots of driver cleanups, improvements and fixups * tag 'media/v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (377 commits) [media] cec: always check all_device_types and features [media] cec: poll should check if there is room in the tx queue [media] vivid: support monitor all mode [media] cec: fix test for unconfigured adapter in main message loop [media] cec: limit the size of the transmit queue [media] cec: zero unused msg part after msg->len [media] cec: don't set fh to NULL in CEC_TRANSMIT [media] cec: clear all status fields before transmit and always fill in sequence [media] cec: CEC_RECEIVE overwrote the timeout field [media] cxd2841er: Reading SNR for DVB-C added [media] cxd2841er: Reading BER and UCB for DVB-C added [media] cxd2841er: fix switch-case for DVB-C [media] cxd2841er: fix signal strength scale for ISDB-T [media] cxd2841er: adjust the dB scale for DVB-C [media] cxd2841er: provide signal strength for DVB-C [media] cxd2841er: fix BER report via DVBv5 stats API [media] mb86a20s: apply mask to val after checking for read failure [media] airspy: fix error logic during device register [media] s5p-cec/TODO: add TODO item [media] cec/TODO: drop comment about sphinx documentation ...
Diffstat (limited to 'drivers/staging')
-rw-r--r--drivers/staging/media/Kconfig14
-rw-r--r--drivers/staging/media/Makefile8
-rw-r--r--drivers/staging/media/cec/Kconfig15
-rw-r--r--drivers/staging/media/cec/Makefile5
-rw-r--r--drivers/staging/media/cec/TODO31
-rw-r--r--drivers/staging/media/cec/cec-adap.c1654
-rw-r--r--drivers/staging/media/cec/cec-api.c579
-rw-r--r--drivers/staging/media/cec/cec-core.c409
-rw-r--r--drivers/staging/media/cec/cec-priv.h56
-rw-r--r--drivers/staging/media/davinci_vpfe/vpfe_video.c14
-rw-r--r--drivers/staging/media/davinci_vpfe/vpfe_video.h2
-rw-r--r--drivers/staging/media/lirc/lirc_parallel.c8
-rw-r--r--drivers/staging/media/mn88472/Kconfig7
-rw-r--r--drivers/staging/media/mn88472/Makefile5
-rw-r--r--drivers/staging/media/mn88472/TODO21
-rw-r--r--drivers/staging/media/mn88472/mn88472.c576
-rw-r--r--drivers/staging/media/mn88472/mn88472_priv.h39
-rw-r--r--drivers/staging/media/mx2/Kconfig15
-rw-r--r--drivers/staging/media/mx2/Makefile3
-rw-r--r--drivers/staging/media/mx2/TODO10
-rw-r--r--drivers/staging/media/mx2/mx2_camera.c1636
-rw-r--r--drivers/staging/media/mx3/Kconfig15
-rw-r--r--drivers/staging/media/mx3/Makefile3
-rw-r--r--drivers/staging/media/mx3/TODO10
-rw-r--r--drivers/staging/media/mx3/mx3_camera.c1264
-rw-r--r--drivers/staging/media/omap1/Kconfig13
-rw-r--r--drivers/staging/media/omap1/Makefile3
-rw-r--r--drivers/staging/media/omap1/TODO8
-rw-r--r--drivers/staging/media/omap1/omap1_camera.c1702
-rw-r--r--drivers/staging/media/omap4iss/iss_video.c12
-rw-r--r--drivers/staging/media/omap4iss/iss_video.h1
-rw-r--r--drivers/staging/media/pulse8-cec/Kconfig10
-rw-r--r--drivers/staging/media/pulse8-cec/Makefile1
-rw-r--r--drivers/staging/media/pulse8-cec/TODO52
-rw-r--r--drivers/staging/media/pulse8-cec/pulse8-cec.c505
-rw-r--r--drivers/staging/media/s5p-cec/Kconfig9
-rw-r--r--drivers/staging/media/s5p-cec/Makefile2
-rw-r--r--drivers/staging/media/s5p-cec/TODO7
-rw-r--r--drivers/staging/media/s5p-cec/exynos_hdmi_cec.h38
-rw-r--r--drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c209
-rw-r--r--drivers/staging/media/s5p-cec/regs-cec.h96
-rw-r--r--drivers/staging/media/s5p-cec/s5p_cec.c294
-rw-r--r--drivers/staging/media/s5p-cec/s5p_cec.h76
-rw-r--r--drivers/staging/media/timb/Kconfig11
-rw-r--r--drivers/staging/media/timb/Makefile1
-rw-r--r--drivers/staging/media/timb/timblogiw.c870
-rw-r--r--drivers/staging/media/tw686x-kh/tw686x-kh-video.c12
-rw-r--r--drivers/staging/media/tw686x-kh/tw686x-kh.h1
48 files changed, 4067 insertions, 6265 deletions
diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig
index de7e9f52e7eb..cae42e56f270 100644
--- a/drivers/staging/media/Kconfig
+++ b/drivers/staging/media/Kconfig
@@ -21,24 +21,20 @@ if STAGING_MEDIA
# Please keep them in alphabetic order
source "drivers/staging/media/bcm2048/Kconfig"
+source "drivers/staging/media/cec/Kconfig"
+
source "drivers/staging/media/cxd2099/Kconfig"
source "drivers/staging/media/davinci_vpfe/Kconfig"
-source "drivers/staging/media/mn88472/Kconfig"
-
-source "drivers/staging/media/mx2/Kconfig"
-
-source "drivers/staging/media/mx3/Kconfig"
-
-source "drivers/staging/media/omap1/Kconfig"
-
source "drivers/staging/media/omap4iss/Kconfig"
-source "drivers/staging/media/timb/Kconfig"
+source "drivers/staging/media/pulse8-cec/Kconfig"
source "drivers/staging/media/tw686x-kh/Kconfig"
+source "drivers/staging/media/s5p-cec/Kconfig"
+
# Keep LIRC at the end, as it has sub-menus
source "drivers/staging/media/lirc/Kconfig"
diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile
index 60a35b3a47e7..87ce8ad1e22a 100644
--- a/drivers/staging/media/Makefile
+++ b/drivers/staging/media/Makefile
@@ -1,11 +1,9 @@
obj-$(CONFIG_I2C_BCM2048) += bcm2048/
+obj-$(CONFIG_MEDIA_CEC) += cec/
+obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec/
obj-$(CONFIG_DVB_CXD2099) += cxd2099/
obj-$(CONFIG_LIRC_STAGING) += lirc/
obj-$(CONFIG_VIDEO_DM365_VPFE) += davinci_vpfe/
-obj-$(CONFIG_VIDEO_MX2) += mx2/
-obj-$(CONFIG_VIDEO_MX3) += mx3/
-obj-$(CONFIG_VIDEO_OMAP1) += omap1/
obj-$(CONFIG_VIDEO_OMAP4) += omap4iss/
-obj-$(CONFIG_DVB_MN88472) += mn88472/
-obj-$(CONFIG_VIDEO_TIMBERDALE) += timb/
+obj-$(CONFIG_USB_PULSE8_CEC) += pulse8-cec/
obj-$(CONFIG_VIDEO_TW686X_KH) += tw686x-kh/
diff --git a/drivers/staging/media/cec/Kconfig b/drivers/staging/media/cec/Kconfig
new file mode 100644
index 000000000000..21457a1f6c9f
--- /dev/null
+++ b/drivers/staging/media/cec/Kconfig
@@ -0,0 +1,15 @@
+config MEDIA_CEC
+ bool "CEC API (EXPERIMENTAL)"
+ depends on MEDIA_SUPPORT
+ select MEDIA_CEC_EDID
+ ---help---
+ Enable the CEC API.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cec.
+
+config MEDIA_CEC_DEBUG
+ bool "CEC debugfs interface (EXPERIMENTAL)"
+ depends on MEDIA_CEC && DEBUG_FS
+ ---help---
+ Turns on the DebugFS interface for CEC devices.
diff --git a/drivers/staging/media/cec/Makefile b/drivers/staging/media/cec/Makefile
new file mode 100644
index 000000000000..bd7f3c593468
--- /dev/null
+++ b/drivers/staging/media/cec/Makefile
@@ -0,0 +1,5 @@
+cec-objs := cec-core.o cec-adap.o cec-api.o
+
+ifeq ($(CONFIG_MEDIA_CEC),y)
+ obj-$(CONFIG_MEDIA_SUPPORT) += cec.o
+endif
diff --git a/drivers/staging/media/cec/TODO b/drivers/staging/media/cec/TODO
new file mode 100644
index 000000000000..a10d4f82b954
--- /dev/null
+++ b/drivers/staging/media/cec/TODO
@@ -0,0 +1,31 @@
+The reason why cec.c is still in staging is that I would like
+to have a bit more confidence in the uABI. The kABI is fine,
+no problem there, but I would like to let the public API mature
+a bit.
+
+Once I'm confident that I didn't miss anything then the cec.c source
+can move to drivers/media and the linux/cec.h and linux/cec-funcs.h
+headers can move to uapi/linux and added to uapi/linux/Kbuild to make
+them public.
+
+Hopefully this will happen later in 2016.
+
+Other TODOs:
+
+- Add a flag to inhibit passing CEC RC messages to the rc subsystem.
+ Applications should be able to choose this when calling S_LOG_ADDRS.
+- If the reply field of cec_msg is set then when the reply arrives it
+ is only sent to the filehandle that transmitted the original message
+ and not to any followers. Should this behavior change or perhaps
+ controlled through a cec_msg flag?
+- Should CEC_LOG_ADDR_TYPE_SPECIFIC be replaced by TYPE_2ND_TV and TYPE_PROCESSOR?
+ And also TYPE_SWITCH and TYPE_CDC_ONLY in addition to the TYPE_UNREGISTERED?
+ This should give the framework more information about the device type
+ since SPECIFIC and UNREGISTERED give no useful information.
+- Once this is out of staging this should no longer be a separate
+ config option, instead it should be selected by drivers that want it.
+- Revisit the IS_REACHABLE(RC_CORE): perhaps the RC_CORE support should
+ be enabled through a separate config option in drivers/media/Kconfig
+ or rc/Kconfig?
+
+Hans Verkuil <hans.verkuil@cisco.com>
diff --git a/drivers/staging/media/cec/cec-adap.c b/drivers/staging/media/cec/cec-adap.c
new file mode 100644
index 000000000000..9fffddb7ac7e
--- /dev/null
+++ b/drivers/staging/media/cec/cec-adap.c
@@ -0,0 +1,1654 @@
+/*
+ * cec-adap.c - HDMI Consumer Electronics Control framework - CEC adapter
+ *
+ * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/kmod.h>
+#include <linux/ktime.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include "cec-priv.h"
+
+static int cec_report_features(struct cec_adapter *adap, unsigned int la_idx);
+static int cec_report_phys_addr(struct cec_adapter *adap, unsigned int la_idx);
+
+/*
+ * 400 ms is the time it takes for one 16 byte message to be
+ * transferred and 5 is the maximum number of retries. Add
+ * another 100 ms as a margin. So if the transmit doesn't
+ * finish before that time something is really wrong and we
+ * have to time out.
+ *
+ * This is a sign that something it really wrong and a warning
+ * will be issued.
+ */
+#define CEC_XFER_TIMEOUT_MS (5 * 400 + 100)
+
+#define call_op(adap, op, arg...) \
+ (adap->ops->op ? adap->ops->op(adap, ## arg) : 0)
+
+#define call_void_op(adap, op, arg...) \
+ do { \
+ if (adap->ops->op) \
+ adap->ops->op(adap, ## arg); \
+ } while (0)
+
+static int cec_log_addr2idx(const struct cec_adapter *adap, u8 log_addr)
+{
+ int i;
+
+ for (i = 0; i < adap->log_addrs.num_log_addrs; i++)
+ if (adap->log_addrs.log_addr[i] == log_addr)
+ return i;
+ return -1;
+}
+
+static unsigned int cec_log_addr2dev(const struct cec_adapter *adap, u8 log_addr)
+{
+ int i = cec_log_addr2idx(adap, log_addr);
+
+ return adap->log_addrs.primary_device_type[i < 0 ? 0 : i];
+}
+
+/*
+ * Queue a new event for this filehandle. If ts == 0, then set it
+ * to the current time.
+ *
+ * The two events that are currently defined do not need to keep track
+ * of intermediate events, so no actual queue of events is needed,
+ * instead just store the latest state and the total number of lost
+ * messages.
+ *
+ * Should new events be added in the future that require intermediate
+ * results to be queued as well, then a proper queue data structure is
+ * required. But until then, just keep it simple.
+ */
+void cec_queue_event_fh(struct cec_fh *fh,
+ const struct cec_event *new_ev, u64 ts)
+{
+ struct cec_event *ev = &fh->events[new_ev->event - 1];
+
+ if (ts == 0)
+ ts = ktime_get_ns();
+
+ mutex_lock(&fh->lock);
+ if (new_ev->event == CEC_EVENT_LOST_MSGS &&
+ fh->pending_events & (1 << new_ev->event)) {
+ /*
+ * If there is already a lost_msgs event, then just
+ * update the lost_msgs count. This effectively
+ * merges the old and new events into one.
+ */
+ ev->lost_msgs.lost_msgs += new_ev->lost_msgs.lost_msgs;
+ goto unlock;
+ }
+
+ /*
+ * Intermediate states are not interesting, so just
+ * overwrite any older event.
+ */
+ *ev = *new_ev;
+ ev->ts = ts;
+ fh->pending_events |= 1 << new_ev->event;
+
+unlock:
+ mutex_unlock(&fh->lock);
+ wake_up_interruptible(&fh->wait);
+}
+
+/* Queue a new event for all open filehandles. */
+static void cec_queue_event(struct cec_adapter *adap,
+ const struct cec_event *ev)
+{
+ u64 ts = ktime_get_ns();
+ struct cec_fh *fh;
+
+ mutex_lock(&adap->devnode.fhs_lock);
+ list_for_each_entry(fh, &adap->devnode.fhs, list)
+ cec_queue_event_fh(fh, ev, ts);
+ mutex_unlock(&adap->devnode.fhs_lock);
+}
+
+/*
+ * Queue a new message for this filehandle. If there is no more room
+ * in the queue, then send the LOST_MSGS event instead.
+ */
+static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg)
+{
+ static const struct cec_event ev_lost_msg = {
+ .ts = 0,
+ .event = CEC_EVENT_LOST_MSGS,
+ .flags = 0,
+ {
+ .lost_msgs.lost_msgs = 1,
+ },
+ };
+ struct cec_msg_entry *entry;
+
+ mutex_lock(&fh->lock);
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ goto lost_msgs;
+
+ entry->msg = *msg;
+ /* Add new msg at the end of the queue */
+ list_add_tail(&entry->list, &fh->msgs);
+
+ /*
+ * if the queue now has more than CEC_MAX_MSG_RX_QUEUE_SZ
+ * messages, drop the oldest one and send a lost message event.
+ */
+ if (fh->queued_msgs == CEC_MAX_MSG_RX_QUEUE_SZ) {
+ list_del(&entry->list);
+ goto lost_msgs;
+ }
+ fh->queued_msgs++;
+ mutex_unlock(&fh->lock);
+ wake_up_interruptible(&fh->wait);
+ return;
+
+lost_msgs:
+ mutex_unlock(&fh->lock);
+ cec_queue_event_fh(fh, &ev_lost_msg, 0);
+}
+
+/*
+ * Queue the message for those filehandles that are in monitor mode.
+ * If valid_la is true (this message is for us or was sent by us),
+ * then pass it on to any monitoring filehandle. If this message
+ * isn't for us or from us, then only give it to filehandles that
+ * are in MONITOR_ALL mode.
+ *
+ * This can only happen if the CEC_CAP_MONITOR_ALL capability is
+ * set and the CEC adapter was placed in 'monitor all' mode.
+ */
+static void cec_queue_msg_monitor(struct cec_adapter *adap,
+ const struct cec_msg *msg,
+ bool valid_la)
+{
+ struct cec_fh *fh;
+ u32 monitor_mode = valid_la ? CEC_MODE_MONITOR :
+ CEC_MODE_MONITOR_ALL;
+
+ mutex_lock(&adap->devnode.fhs_lock);
+ list_for_each_entry(fh, &adap->devnode.fhs, list) {
+ if (fh->mode_follower >= monitor_mode)
+ cec_queue_msg_fh(fh, msg);
+ }
+ mutex_unlock(&adap->devnode.fhs_lock);
+}
+
+/*
+ * Queue the message for follower filehandles.
+ */
+static void cec_queue_msg_followers(struct cec_adapter *adap,
+ const struct cec_msg *msg)
+{
+ struct cec_fh *fh;
+
+ mutex_lock(&adap->devnode.fhs_lock);
+ list_for_each_entry(fh, &adap->devnode.fhs, list) {
+ if (fh->mode_follower == CEC_MODE_FOLLOWER)
+ cec_queue_msg_fh(fh, msg);
+ }
+ mutex_unlock(&adap->devnode.fhs_lock);
+}
+
+/* Notify userspace of an adapter state change. */
+static void cec_post_state_event(struct cec_adapter *adap)
+{
+ struct cec_event ev = {
+ .event = CEC_EVENT_STATE_CHANGE,
+ };
+
+ ev.state_change.phys_addr = adap->phys_addr;
+ ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
+ cec_queue_event(adap, &ev);
+}
+
+/*
+ * A CEC transmit (and a possible wait for reply) completed.
+ * If this was in blocking mode, then complete it, otherwise
+ * queue the message for userspace to dequeue later.
+ *
+ * This function is called with adap->lock held.
+ */
+static void cec_data_completed(struct cec_data *data)
+{
+ /*
+ * Delete this transmit from the filehandle's xfer_list since
+ * we're done with it.
+ *
+ * Note that if the filehandle is closed before this transmit
+ * finished, then the release() function will set data->fh to NULL.
+ * Without that we would be referring to a closed filehandle.
+ */
+ if (data->fh)
+ list_del(&data->xfer_list);
+
+ if (data->blocking) {
+ /*
+ * Someone is blocking so mark the message as completed
+ * and call complete.
+ */
+ data->completed = true;
+ complete(&data->c);
+ } else {
+ /*
+ * No blocking, so just queue the message if needed and
+ * free the memory.
+ */
+ if (data->fh)
+ cec_queue_msg_fh(data->fh, &data->msg);
+ kfree(data);
+ }
+}
+
+/*
+ * A pending CEC transmit needs to be cancelled, either because the CEC
+ * adapter is disabled or the transmit takes an impossibly long time to
+ * finish.
+ *
+ * This function is called with adap->lock held.
+ */
+static void cec_data_cancel(struct cec_data *data)
+{
+ /*
+ * It's either the current transmit, or it is a pending
+ * transmit. Take the appropriate action to clear it.
+ */
+ if (data->adap->transmitting == data) {
+ data->adap->transmitting = NULL;
+ } else {
+ list_del_init(&data->list);
+ if (!(data->msg.tx_status & CEC_TX_STATUS_OK))
+ data->adap->transmit_queue_sz--;
+ }
+
+ /* Mark it as an error */
+ data->msg.tx_ts = ktime_get_ns();
+ data->msg.tx_status = CEC_TX_STATUS_ERROR |
+ CEC_TX_STATUS_MAX_RETRIES;
+ data->attempts = 0;
+ data->msg.tx_error_cnt = 1;
+ /* Queue transmitted message for monitoring purposes */
+ cec_queue_msg_monitor(data->adap, &data->msg, 1);
+
+ cec_data_completed(data);
+}
+
+/*
+ * Main CEC state machine
+ *
+ * Wait until the thread should be stopped, or we are not transmitting and
+ * a new transmit message is queued up, in which case we start transmitting
+ * that message. When the adapter finished transmitting the message it will
+ * call cec_transmit_done().
+ *
+ * If the adapter is disabled, then remove all queued messages instead.
+ *
+ * If the current transmit times out, then cancel that transmit.
+ */
+int cec_thread_func(void *_adap)
+{
+ struct cec_adapter *adap = _adap;
+
+ for (;;) {
+ unsigned int signal_free_time;
+ struct cec_data *data;
+ bool timeout = false;
+ u8 attempts;
+
+ if (adap->transmitting) {
+ int err;
+
+ /*
+ * We are transmitting a message, so add a timeout
+ * to prevent the state machine to get stuck waiting
+ * for this message to finalize and add a check to
+ * see if the adapter is disabled in which case the
+ * transmit should be canceled.
+ */
+ err = wait_event_interruptible_timeout(adap->kthread_waitq,
+ kthread_should_stop() ||
+ (!adap->is_configured && !adap->is_configuring) ||
+ (!adap->transmitting &&
+ !list_empty(&adap->transmit_queue)),
+ msecs_to_jiffies(CEC_XFER_TIMEOUT_MS));
+ timeout = err == 0;
+ } else {
+ /* Otherwise we just wait for something to happen. */
+ wait_event_interruptible(adap->kthread_waitq,
+ kthread_should_stop() ||
+ (!adap->transmitting &&
+ !list_empty(&adap->transmit_queue)));
+ }
+
+ mutex_lock(&adap->lock);
+
+ if ((!adap->is_configured && !adap->is_configuring) ||
+ kthread_should_stop()) {
+ /*
+ * If the adapter is disabled, or we're asked to stop,
+ * then cancel any pending transmits.
+ */
+ while (!list_empty(&adap->transmit_queue)) {
+ data = list_first_entry(&adap->transmit_queue,
+ struct cec_data, list);
+ cec_data_cancel(data);
+ }
+ if (adap->transmitting)
+ cec_data_cancel(adap->transmitting);
+
+ /*
+ * Cancel the pending timeout work. We have to unlock
+ * the mutex when flushing the work since
+ * cec_wait_timeout() will take it. This is OK since
+ * no new entries can be added to wait_queue as long
+ * as adap->transmitting is NULL, which it is due to
+ * the cec_data_cancel() above.
+ */
+ while (!list_empty(&adap->wait_queue)) {
+ data = list_first_entry(&adap->wait_queue,
+ struct cec_data, list);
+
+ if (!cancel_delayed_work(&data->work)) {
+ mutex_unlock(&adap->lock);
+ flush_scheduled_work();
+ mutex_lock(&adap->lock);
+ }
+ cec_data_cancel(data);
+ }
+ goto unlock;
+ }
+
+ if (adap->transmitting && timeout) {
+ /*
+ * If we timeout, then log that. This really shouldn't
+ * happen and is an indication of a faulty CEC adapter
+ * driver, or the CEC bus is in some weird state.
+ */
+ dprintk(0, "message %*ph timed out!\n",
+ adap->transmitting->msg.len,
+ adap->transmitting->msg.msg);
+ /* Just give up on this. */
+ cec_data_cancel(adap->transmitting);
+ goto unlock;
+ }
+
+ /*
+ * If we are still transmitting, or there is nothing new to
+ * transmit, then just continue waiting.
+ */
+ if (adap->transmitting || list_empty(&adap->transmit_queue))
+ goto unlock;
+
+ /* Get a new message to transmit */
+ data = list_first_entry(&adap->transmit_queue,
+ struct cec_data, list);
+ list_del_init(&data->list);
+ adap->transmit_queue_sz--;
+ /* Make this the current transmitting message */
+ adap->transmitting = data;
+
+ /*
+ * Suggested number of attempts as per the CEC 2.0 spec:
+ * 4 attempts is the default, except for 'secondary poll
+ * messages', i.e. poll messages not sent during the adapter
+ * configuration phase when it allocates logical addresses.
+ */
+ if (data->msg.len == 1 && adap->is_configured)
+ attempts = 2;
+ else
+ attempts = 4;
+
+ /* Set the suggested signal free time */
+ if (data->attempts) {
+ /* should be >= 3 data bit periods for a retry */
+ signal_free_time = CEC_SIGNAL_FREE_TIME_RETRY;
+ } else if (data->new_initiator) {
+ /* should be >= 5 data bit periods for new initiator */
+ signal_free_time = CEC_SIGNAL_FREE_TIME_NEW_INITIATOR;
+ } else {
+ /*
+ * should be >= 7 data bit periods for sending another
+ * frame immediately after another.
+ */
+ signal_free_time = CEC_SIGNAL_FREE_TIME_NEXT_XFER;
+ }
+ if (data->attempts == 0)
+ data->attempts = attempts;
+
+ /* Tell the adapter to transmit, cancel on error */
+ if (adap->ops->adap_transmit(adap, data->attempts,
+ signal_free_time, &data->msg))
+ cec_data_cancel(data);
+
+unlock:
+ mutex_unlock(&adap->lock);
+
+ if (kthread_should_stop())
+ break;
+ }
+ return 0;
+}
+
+/*
+ * Called by the CEC adapter if a transmit finished.
+ */
+void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
+ u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt)
+{
+ struct cec_data *data;
+ struct cec_msg *msg;
+ u64 ts = ktime_get_ns();
+
+ dprintk(2, "cec_transmit_done %02x\n", status);
+ mutex_lock(&adap->lock);
+ data = adap->transmitting;
+ if (!data) {
+ /*
+ * This can happen if a transmit was issued and the cable is
+ * unplugged while the transmit is ongoing. Ignore this
+ * transmit in that case.
+ */
+ dprintk(1, "cec_transmit_done without an ongoing transmit!\n");
+ goto unlock;
+ }
+
+ msg = &data->msg;
+
+ /* Drivers must fill in the status! */
+ WARN_ON(status == 0);
+ msg->tx_ts = ts;
+ msg->tx_status |= status;
+ msg->tx_arb_lost_cnt += arb_lost_cnt;
+ msg->tx_nack_cnt += nack_cnt;
+ msg->tx_low_drive_cnt += low_drive_cnt;
+ msg->tx_error_cnt += error_cnt;
+
+ /* Mark that we're done with this transmit */
+ adap->transmitting = NULL;
+
+ /*
+ * If there are still retry attempts left and there was an error and
+ * the hardware didn't signal that it retried itself (by setting
+ * CEC_TX_STATUS_MAX_RETRIES), then we will retry ourselves.
+ */
+ if (data->attempts > 1 &&
+ !(status & (CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_OK))) {