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-rw-r--r--drivers/media/cec/Makefile1
-rw-r--r--drivers/media/cec/cec-adap.c31
-rw-r--r--drivers/media/cec/cec-api.c19
-rw-r--r--drivers/media/cec/cec-core.c9
-rw-r--r--drivers/media/cec/cec-pin-priv.h133
-rw-r--r--drivers/media/cec/cec-pin.c40
6 files changed, 204 insertions, 29 deletions
diff --git a/drivers/media/cec/Makefile b/drivers/media/cec/Makefile
index 3353c1741961..41ee3325e1ea 100644
--- a/drivers/media/cec/Makefile
+++ b/drivers/media/cec/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
cec-objs := cec-core.o cec-adap.o cec-api.o cec-edid.o
ifeq ($(CONFIG_CEC_NOTIFIER),y)
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index eed6c397d840..98f88c43f62c 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -86,7 +86,7 @@ void cec_queue_event_fh(struct cec_fh *fh,
const struct cec_event *new_ev, u64 ts)
{
static const u8 max_events[CEC_NUM_EVENTS] = {
- 1, 1, 64, 64,
+ 1, 1, 64, 64, 8, 8,
};
struct cec_event_entry *entry;
unsigned int ev_idx = new_ev->event - 1;
@@ -170,6 +170,22 @@ void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
}
EXPORT_SYMBOL_GPL(cec_queue_pin_cec_event);
+/* Notify userspace that the HPD pin changed state at the given time. */
+void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts)
+{
+ struct cec_event ev = {
+ .event = is_high ? CEC_EVENT_PIN_HPD_HIGH :
+ CEC_EVENT_PIN_HPD_LOW,
+ };
+ struct cec_fh *fh;
+
+ mutex_lock(&adap->devnode.lock);
+ list_for_each_entry(fh, &adap->devnode.fhs, list)
+ cec_queue_event_fh(fh, &ev, ktime_to_ns(ts));
+ mutex_unlock(&adap->devnode.lock);
+}
+EXPORT_SYMBOL_GPL(cec_queue_pin_hpd_event);
+
/*
* Queue a new message for this filehandle.
*
@@ -1797,12 +1813,19 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
*/
switch (msg->msg[1]) {
case CEC_MSG_GET_CEC_VERSION:
- case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
case CEC_MSG_ABORT:
case CEC_MSG_GIVE_DEVICE_POWER_STATUS:
- case CEC_MSG_GIVE_PHYSICAL_ADDR:
case CEC_MSG_GIVE_OSD_NAME:
+ /*
+ * These messages reply with a directed message, so ignore if
+ * the initiator is Unregistered.
+ */
+ if (!adap->passthrough && from_unregistered)
+ return 0;
+ /* Fall through */
+ case CEC_MSG_GIVE_DEVICE_VENDOR_ID:
case CEC_MSG_GIVE_FEATURES:
+ case CEC_MSG_GIVE_PHYSICAL_ADDR:
/*
* Skip processing these messages if the passthrough mode
* is on.
@@ -1810,7 +1833,7 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
if (adap->passthrough)
goto skip_processing;
/* Ignore if addressing is wrong */
- if (is_broadcast || from_unregistered)
+ if (is_broadcast)
return 0;
break;
diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c
index a079f7fe018c..3dba3aa34a43 100644
--- a/drivers/media/cec/cec-api.c
+++ b/drivers/media/cec/cec-api.c
@@ -32,6 +32,7 @@
#include <media/cec-pin.h>
#include "cec-priv.h"
+#include "cec-pin-priv.h"
static inline struct cec_devnode *cec_devnode_data(struct file *filp)
{
@@ -529,7 +530,7 @@ static int cec_open(struct inode *inode, struct file *filp)
* Initial events that are automatically sent when the cec device is
* opened.
*/
- struct cec_event ev_state = {
+ struct cec_event ev = {
.event = CEC_EVENT_STATE_CHANGE,
.flags = CEC_EVENT_FL_INITIAL_STATE,
};
@@ -569,9 +570,19 @@ static int cec_open(struct inode *inode, struct file *filp)
filp->private_data = fh;
/* Queue up initial state events */
- ev_state.state_change.phys_addr = adap->phys_addr;
- ev_state.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
- cec_queue_event_fh(fh, &ev_state, 0);
+ ev.state_change.phys_addr = adap->phys_addr;
+ ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
+ cec_queue_event_fh(fh, &ev, 0);
+#ifdef CONFIG_CEC_PIN
+ if (adap->pin && adap->pin->ops->read_hpd) {
+ err = adap->pin->ops->read_hpd(adap);
+ if (err >= 0) {
+ ev.event = err ? CEC_EVENT_PIN_HPD_HIGH :
+ CEC_EVENT_PIN_HPD_LOW;
+ cec_queue_event_fh(fh, &ev, 0);
+ }
+ }
+#endif
list_add(&fh->list, &devnode->fhs);
mutex_unlock(&devnode->lock);
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c
index 648136e552d5..5870da6a567f 100644
--- a/drivers/media/cec/cec-core.c
+++ b/drivers/media/cec/cec-core.c
@@ -112,10 +112,6 @@ static int __must_check cec_devnode_register(struct cec_devnode *devnode,
int minor;
int ret;
- /* Initialization */
- INIT_LIST_HEAD(&devnode->fhs);
- mutex_init(&devnode->lock);
-
/* Part 1: Find a free minor number */
mutex_lock(&cec_devnode_lock);
minor = find_next_zero_bit(cec_devnode_nums, CEC_NUM_DEVICES, 0);
@@ -242,6 +238,10 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
INIT_LIST_HEAD(&adap->wait_queue);
init_waitqueue_head(&adap->kthread_waitq);
+ /* adap->devnode initialization */
+ INIT_LIST_HEAD(&adap->devnode.fhs);
+ mutex_init(&adap->devnode.lock);
+
adap->kthread = kthread_run(cec_thread_func, adap, "cec-%s", name);
if (IS_ERR(adap->kthread)) {
pr_err("cec-%s: kernel_thread() failed\n", name);
@@ -277,7 +277,6 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
adap->rc->input_id.version = 1;
adap->rc->driver_name = CEC_NAME;
adap->rc->allowed_protocols = RC_PROTO_BIT_CEC;
- adap->rc->enabled_protocols = RC_PROTO_BIT_CEC;
adap->rc->priv = adap;
adap->rc->map_name = RC_MAP_CEC;
adap->rc->timeout = MS_TO_NS(100);
diff --git a/drivers/media/cec/cec-pin-priv.h b/drivers/media/cec/cec-pin-priv.h
new file mode 100644
index 000000000000..7d0def199762
--- /dev/null
+++ b/drivers/media/cec/cec-pin-priv.h
@@ -0,0 +1,133 @@
+/*
+ * cec-pin-priv.h - internal cec-pin header
+ *
+ * Copyright 2017 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.
+ */
+
+#ifndef LINUX_CEC_PIN_PRIV_H
+#define LINUX_CEC_PIN_PRIV_H
+
+#include <linux/types.h>
+#include <linux/atomic.h>
+#include <media/cec-pin.h>
+
+enum cec_pin_state {
+ /* CEC is off */
+ CEC_ST_OFF,
+ /* CEC is idle, waiting for Rx or Tx */
+ CEC_ST_IDLE,
+
+ /* Tx states */
+
+ /* Pending Tx, waiting for Signal Free Time to expire */
+ CEC_ST_TX_WAIT,
+ /* Low-drive was detected, wait for bus to go high */
+ CEC_ST_TX_WAIT_FOR_HIGH,
+ /* Drive CEC low for the start bit */
+ CEC_ST_TX_START_BIT_LOW,
+ /* Drive CEC high for the start bit */
+ CEC_ST_TX_START_BIT_HIGH,
+ /* Drive CEC low for the 0 bit */
+ CEC_ST_TX_DATA_BIT_0_LOW,
+ /* Drive CEC high for the 0 bit */
+ CEC_ST_TX_DATA_BIT_0_HIGH,
+ /* Drive CEC low for the 1 bit */
+ CEC_ST_TX_DATA_BIT_1_LOW,
+ /* Drive CEC high for the 1 bit */
+ CEC_ST_TX_DATA_BIT_1_HIGH,
+ /*
+ * Wait for start of sample time to check for Ack bit or first
+ * four initiator bits to check for Arbitration Lost.
+ */
+ CEC_ST_TX_DATA_BIT_1_HIGH_PRE_SAMPLE,
+ /* Wait for end of bit period after sampling */
+ CEC_ST_TX_DATA_BIT_1_HIGH_POST_SAMPLE,
+
+ /* Rx states */
+
+ /* Start bit low detected */
+ CEC_ST_RX_START_BIT_LOW,
+ /* Start bit high detected */
+ CEC_ST_RX_START_BIT_HIGH,
+ /* Wait for bit sample time */
+ CEC_ST_RX_DATA_SAMPLE,
+ /* Wait for earliest end of bit period after sampling */
+ CEC_ST_RX_DATA_POST_SAMPLE,
+ /* Wait for CEC to go high (i.e. end of bit period */
+ CEC_ST_RX_DATA_HIGH,
+ /* Drive CEC low to send 0 Ack bit */
+ CEC_ST_RX_ACK_LOW,
+ /* End of 0 Ack time, wait for earliest end of bit period */
+ CEC_ST_RX_ACK_LOW_POST,
+ /* Wait for CEC to go high (i.e. end of bit period */
+ CEC_ST_RX_ACK_HIGH_POST,
+ /* Wait for earliest end of bit period and end of message */
+ CEC_ST_RX_ACK_FINISH,
+
+ /* Start low drive */
+ CEC_ST_LOW_DRIVE,
+ /* Monitor pin using interrupts */
+ CEC_ST_RX_IRQ,
+
+ /* Total number of pin states */
+ CEC_PIN_STATES
+};
+
+#define CEC_NUM_PIN_EVENTS 128
+
+#define CEC_PIN_IRQ_UNCHANGED 0
+#define CEC_PIN_IRQ_DISABLE 1
+#define CEC_PIN_IRQ_ENABLE 2
+
+struct cec_pin {
+ struct cec_adapter *adap;
+ const struct cec_pin_ops *ops;
+ struct task_struct *kthread;
+ wait_queue_head_t kthread_waitq;
+ struct hrtimer timer;
+ ktime_t ts;
+ unsigned int wait_usecs;
+ u16 la_mask;
+ bool enabled;
+ bool monitor_all;
+ bool rx_eom;
+ bool enable_irq_failed;
+ enum cec_pin_state state;
+ struct cec_msg tx_msg;
+ u32 tx_bit;
+ bool tx_nacked;
+ u32 tx_signal_free_time;
+ struct cec_msg rx_msg;
+ u32 rx_bit;
+
+ struct cec_msg work_rx_msg;
+ u8 work_tx_status;
+ ktime_t work_tx_ts;
+ atomic_t work_irq_change;
+ atomic_t work_pin_events;
+ unsigned int work_pin_events_wr;
+ unsigned int work_pin_events_rd;
+ ktime_t work_pin_ts[CEC_NUM_PIN_EVENTS];
+ bool work_pin_is_high[CEC_NUM_PIN_EVENTS];
+ ktime_t timer_ts;
+ u32 timer_cnt;
+ u32 timer_100ms_overruns;
+ u32 timer_300ms_overruns;
+ u32 timer_max_overrun;
+ u32 timer_sum_overrun;
+};
+
+#endif
diff --git a/drivers/media/cec/cec-pin.c b/drivers/media/cec/cec-pin.c
index c003b8eac617..b48dfe844118 100644
--- a/drivers/media/cec/cec-pin.c
+++ b/drivers/media/cec/cec-pin.c
@@ -20,6 +20,7 @@
#include <linux/sched/types.h>
#include <media/cec-pin.h>
+#include "cec-pin-priv.h"
/* All timings are in microseconds */
@@ -132,7 +133,7 @@ static void cec_pin_to_idle(struct cec_pin *pin)
pin->rx_msg.len = 0;
memset(pin->rx_msg.msg, 0, sizeof(pin->rx_msg.msg));
pin->state = CEC_ST_IDLE;
- pin->ts = 0;
+ pin->ts = ns_to_ktime(0);
}
/*
@@ -426,7 +427,7 @@ static void cec_pin_rx_states(struct cec_pin *pin, ktime_t ts)
v = cec_pin_read(pin);
if (v && pin->rx_eom) {
pin->work_rx_msg = pin->rx_msg;
- pin->work_rx_msg.rx_ts = ts;
+ pin->work_rx_msg.rx_ts = ktime_to_ns(ts);
wake_up_interruptible(&pin->kthread_waitq);
pin->ts = ts;
pin->state = CEC_ST_RX_ACK_FINISH;
@@ -457,7 +458,7 @@ static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
s32 delta;
ts = ktime_get();
- if (pin->timer_ts) {
+ if (ktime_to_ns(pin->timer_ts)) {
delta = ktime_us_delta(ts, pin->timer_ts);
pin->timer_cnt++;
if (delta > 100 && pin->state != CEC_ST_IDLE) {
@@ -481,17 +482,19 @@ static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
if (pin->wait_usecs > 150) {
pin->wait_usecs -= 100;
pin->timer_ts = ktime_add_us(ts, 100);
- hrtimer_forward_now(timer, 100000);
+ hrtimer_forward_now(timer, ns_to_ktime(100000));
return HRTIMER_RESTART;
}
if (pin->wait_usecs > 100) {
pin->wait_usecs /= 2;
pin->timer_ts = ktime_add_us(ts, pin->wait_usecs);
- hrtimer_forward_now(timer, pin->wait_usecs * 1000);
+ hrtimer_forward_now(timer,
+ ns_to_ktime(pin->wait_usecs * 1000));
return HRTIMER_RESTART;
}
pin->timer_ts = ktime_add_us(ts, pin->wait_usecs);
- hrtimer_forward_now(timer, pin->wait_usecs * 1000);
+ hrtimer_forward_now(timer,
+ ns_to_ktime(pin->wait_usecs * 1000));
pin->wait_usecs = 0;
return HRTIMER_RESTART;
}
@@ -531,7 +534,7 @@ static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
pin->state = CEC_ST_RX_START_BIT_LOW;
break;
}
- if (pin->ts == 0)
+ if (ktime_to_ns(pin->ts) == 0)
pin->ts = ts;
if (pin->tx_msg.len) {
/*
@@ -572,12 +575,13 @@ static enum hrtimer_restart cec_pin_timer(struct hrtimer *timer)
if (!adap->monitor_pin_cnt || states[pin->state].usecs <= 150) {
pin->wait_usecs = 0;
pin->timer_ts = ktime_add_us(ts, states[pin->state].usecs);
- hrtimer_forward_now(timer, states[pin->state].usecs * 1000);
+ hrtimer_forward_now(timer,
+ ns_to_ktime(states[pin->state].usecs * 1000));
return HRTIMER_RESTART;
}
pin->wait_usecs = states[pin->state].usecs - 100;
pin->timer_ts = ktime_add_us(ts, 100);
- hrtimer_forward_now(timer, 100000);
+ hrtimer_forward_now(timer, ns_to_ktime(100000));
return HRTIMER_RESTART;
}
@@ -596,7 +600,7 @@ static int cec_pin_thread_func(void *_adap)
if (pin->work_rx_msg.len) {
cec_received_msg_ts(adap, &pin->work_rx_msg,
- pin->work_rx_msg.rx_ts);
+ ns_to_ktime(pin->work_rx_msg.rx_ts));
pin->work_rx_msg.len = 0;
}
if (pin->work_tx_status) {
@@ -623,13 +627,15 @@ static int cec_pin_thread_func(void *_adap)
pin->ops->disable_irq(adap);
cec_pin_high(pin);
cec_pin_to_idle(pin);
- hrtimer_start(&pin->timer, 0, HRTIMER_MODE_REL);
+ hrtimer_start(&pin->timer, ns_to_ktime(0),
+ HRTIMER_MODE_REL);
break;
case CEC_PIN_IRQ_ENABLE:
pin->enable_irq_failed = !pin->ops->enable_irq(adap);
if (pin->enable_irq_failed) {
cec_pin_to_idle(pin);
- hrtimer_start(&pin->timer, 0, HRTIMER_MODE_REL);
+ hrtimer_start(&pin->timer, ns_to_ktime(0),
+ HRTIMER_MODE_REL);
}
break;
default:
@@ -653,7 +659,7 @@ static int cec_pin_adap_enable(struct cec_adapter *adap, bool enable)
cec_pin_read(pin);
cec_pin_to_idle(pin);
pin->tx_msg.len = 0;
- pin->timer_ts = 0;
+ pin->timer_ts = ns_to_ktime(0);
atomic_set(&pin->work_irq_change, CEC_PIN_IRQ_UNCHANGED);
pin->kthread = kthread_run(cec_pin_thread_func, adap,
"cec-pin");
@@ -661,7 +667,8 @@ static int cec_pin_adap_enable(struct cec_adapter *adap, bool enable)
pr_err("cec-pin: kernel_thread() failed\n");
return PTR_ERR(pin->kthread);
}
- hrtimer_start(&pin->timer, 0, HRTIMER_MODE_REL);
+ hrtimer_start(&pin->timer, ns_to_ktime(0),
+ HRTIMER_MODE_REL);
} else {
if (pin->ops->disable_irq)
pin->ops->disable_irq(adap);
@@ -699,7 +706,8 @@ static int cec_pin_adap_transmit(struct cec_adapter *adap, u8 attempts,
pin->ops->disable_irq(adap);
cec_pin_high(pin);
cec_pin_to_idle(pin);
- hrtimer_start(&pin->timer, 0, HRTIMER_MODE_REL);
+ hrtimer_start(&pin->timer, ns_to_ktime(0),
+ HRTIMER_MODE_REL);
}
return 0;
}
@@ -789,7 +797,7 @@ struct cec_adapter *cec_pin_allocate_adapter(const struct cec_pin_ops *pin_ops,
caps | CEC_CAP_MONITOR_ALL | CEC_CAP_MONITOR_PIN,
CEC_MAX_LOG_ADDRS);
- if (PTR_ERR_OR_ZERO(adap)) {
+ if (IS_ERR(adap)) {
kfree(pin);
return adap;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-11 14:57:50 +0300