/*
* Copyright (c) 2014, 2016-2017, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG 0
#define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
#include <cutils/log.h>
#include <errno.h>
#include <hardware/hdmi_cec.h>
#include <utils/Trace.h>
#include <utils/debug.h>
#include <utils/sys.h>
#include <vector>
#include "qhdmi_cec.h"
namespace qhdmicec {
const int NUM_HDMI_PORTS = 1;
const int MAX_SYSFS_DATA = 128;
const int MAX_CEC_FRAME_SIZE = 20;
const int MAX_SEND_MESSAGE_RETRIES = 1;
const char* SYSFS_BASE = "/sys/devices/virtual/graphics/fb";
const char* UEVENT_SWITCH_HDMI = "change@/devices/virtual/switch/hdmi";
const char* FB_PATH = "/sys/devices/virtual/graphics/fb";
enum {
LOGICAL_ADDRESS_SET = 1,
LOGICAL_ADDRESS_UNSET = -1,
};
// Offsets of members of struct hdmi_cec_msg
// drivers/video/msm/mdss/mdss_hdmi_cec.c
// XXX: Get this from a driver header
enum {
CEC_OFFSET_SENDER_ID,
CEC_OFFSET_RECEIVER_ID,
CEC_OFFSET_OPCODE,
CEC_OFFSET_OPERAND,
CEC_OFFSET_FRAME_LENGTH = 17,
CEC_OFFSET_RETRANSMIT,
};
//Forward declarations
static void cec_close_context(cec_context_t* ctx __unused);
static int cec_enable(cec_context_t *ctx, int enable);
static int cec_is_connected(const struct hdmi_cec_device* dev, int port_id);
static void cec_monitor_deinit(cec_context_t* ctx);
static void handle_cec_msg_event(cec_context_t* ctx, uint32_t node_event);
void event_monitor(cec_context_t* ctx); // hdmi event monitor function
static int get_event_value(const char *uevent_data, int length, const char *event_info);
static int uevent_init(int *uevent_fd);
static void handle_hdmihotplug_event(cec_context_t* ctx, uint32_t node_event);
static int populate_event_data(cec_context_t* ctx, std::vector<eventData> *event_data_list);
static int set_event_params(cec_context_t* ctx, uint32_t node_event, eventData *event_data);
static void handle_exit_event(cec_context_t* ctx, uint32_t node_event);
static ssize_t read_node(const char *path, char *data)
{
ssize_t err = 0;
FILE *fp = NULL;
err = access(path, R_OK);
if (!err) {
fp = fopen(path, "r");
if (fp) {
err = fread(data, sizeof(char), MAX_SYSFS_DATA ,fp);
fclose(fp);
}
}
return err;
}
static ssize_t write_node(const char *path, const char *data, size_t len)
{
ssize_t err = 0;
int fd = -1;
err = access(path, W_OK);
if (!err) {
fd = open(path, O_WRONLY);
errno = 0;
err = write(fd, data, len);
if (err < 0) {
err = -errno;
}
close(fd);
} else {
ALOGE("%s: Failed to access path: %s error: %s",
__FUNCTION__, path, strerror(errno));
err = -errno;
}
return err;
}
// Helper function to write integer values to the full sysfs path
static ssize_t write_int_to_node(cec_context_t *ctx,
const char *path_postfix,
const int value)
{
std::string sysfs_full_path;
char sysfs_data[MAX_SYSFS_DATA];
snprintf(sysfs_data, sizeof(sysfs_data), "%d",value);
sysfs_full_path = ctx->fb_sysfs_path + "/";
sysfs_full_path.append(path_postfix);
ssize_t err = write_node(sysfs_full_path.c_str(), sysfs_data, strlen(sysfs_data));
return err;
}
static void hex_to_string(const char *msg, ssize_t len, char *str)
{
//Functions assumes sufficient memory in str
char *ptr = str;
for(int i=0; i < len ; i++) {
ptr += snprintf(ptr, 3, "%02X", msg[i]);
// Overwrite null termination of snprintf in all except the last byte
if (i < len - 1)
*ptr = ':';
ptr++;
}
}
static ssize_t cec_get_fb_node_number(cec_context_t *ctx)
{
//XXX: Do this from a common utility library across the display HALs
const int MAX_FB_DEVICES = 2;
ssize_t len = 0;
std::string fb_type_path;
char fb_type[MAX_SYSFS_DATA];
const char *dtv_panel_str = "dtv panel";
for(int num = 0; num < MAX_FB_DEVICES; num++) {
fb_type_path = SYSFS_BASE + std::to_string(ctx->fb_num) + "/msm_fb_type";
len = read_node(fb_type_path.c_str(), fb_type);
ALOGD_IF(DEBUG, "%s: fb_type:%s", __FUNCTION__, fb_type);
if(len > 0 && (strncmp(fb_type, dtv_panel_str, strlen(dtv_panel_str)) == 0)){
ALOGD_IF(DEBUG, "%s: Found DTV panel at fb%d", __FUNCTION__, num);
ctx->fb_num = num;
ctx->fb_sysfs_path = SYSFS_BASE + std::to_string(ctx->fb_num);
break;
}
}
if (len < 0)
return len;
else
return 0;
}
static int cec_add_logical_address(const struct hdmi_cec_device* dev,
cec_logical_address_t addr)
{
if (addr < CEC_ADDR_TV || addr > CEC_ADDR_BROADCAST) {
ALOGE("%s: Received invalid address: %d ", __FUNCTION__, addr);
return -EINVAL;
}
cec_context_t* ctx = (cec_context_t*)(dev);
ctx->logical_address[addr] = LOGICAL_ADDRESS_SET;
//XXX: We can get multiple logical addresses here but we can only send one
//to the driver. Store locally for now
ssize_t err = write_int_to_node(ctx, "cec/logical_addr", addr);
ALOGI("%s: Allocated logical address: %d ", __FUNCTION__, addr);
return (int) err;
}
static void cec_clear_logical_address(const struct hdmi_cec_device* dev)
{
cec_context_t* ctx = (cec_context_t*)(dev);
memset(ctx->logical_address, LOGICAL_ADDRESS_UNSET,
sizeof(ctx->logical_address));
//XXX: Find logical_addr that needs to be reset
write_int_to_node(ctx, "cec/logical_addr", 15);
ALOGD_IF(DEBUG, "%s: Cleared logical addresses", __FUNCTION__);
}
static int cec_get_physical_address(const struct hdmi_cec_device* dev,
uint16_t* addr)
{
cec_context_t* ctx = (cec_context_t*)(dev);
std::string pa_path;
char pa_data[MAX_SYSFS_DATA];
pa_path = ctx->fb_sysfs_path;
pa_path.append("/pa");
int err = (int) read_node(pa_path.c_str(), pa_data);
*addr = (uint16_t) atoi(pa_data);
ALOGD_IF(DEBUG, "%s: Physical Address: 0x%x", __FUNCTION__, *addr);
if (err < 0)
return err;
else
return 0;
}
static int cec_send_message(const struct hdmi_cec_device* dev,
const cec_message_t* msg)
{
ATRACE_CALL();
if(cec_is_connected(dev, 0) <= 0)
return HDMI_RESULT_FAIL;
cec_context_t* ctx = (cec_context_t*)(dev);
ALOGD_IF(DEBUG, "%s: initiator: %d destination: %d length: %u",
__FUNCTION__, msg->initiator, msg->destination,
(uint32_t) msg->length);
// Dump message received from framework
char dump[128];
if(msg->length > 0) {
hex_to_string((char*)msg->body, msg->length, dump);
ALOGD_IF(DEBUG, "%s: message from framework: %s", __FUNCTION__, dump);
}
std::string write_msg_path;
char write_msg[MAX_CEC_FRAME_SIZE];
memset(write_msg, 0, sizeof(write_msg));
// See definition of struct hdmi_cec_msg in driver code
// drivers/video/msm/mdss/mdss_hdmi_cec.c
// Write header block
// XXX: Include this from header in kernel
write_msg[CEC_OFFSET_SENDER_ID] = msg->initiator;
write_msg[CEC_OFFSET_RECEIVER_ID] = msg->destination;
//Kernel splits opcode/operand, but Android sends it in one byte array
write_msg[CEC_OFFSET_OPCODE] = msg->body[0];
if(msg->length > 1) {
memcpy(&write_msg[CEC_OFFSET_OPERAND], &msg->body[1],
sizeof(char)*(msg->length - 1));
}
//msg length + initiator + destination
write_msg[CEC_OFFSET_FRAME_LENGTH] = (unsigned char) (msg->length + 1);
hex_to_string(write_msg, sizeof(write_msg), dump);
write_msg_path = ctx->fb_sysfs_path;
write_msg_path.append("/cec/wr_msg");
int retry_count = 0;
ssize_t err = 0;
//HAL spec requires us to retry at least once.
while (true) {
err = write_node(write_msg_path.c_str(), write_msg, sizeof(write_msg));
retry_count++;
if (err == -EAGAIN && retry_count <= MAX_SEND_MESSAGE_RETRIES) {
ALOGE("%s: CEC line busy, retrying", __FUNCTION__);
} else {
break;
}
}
if (err < 0) {
if (err == -ENXIO) {
ALOGI("%s: No device exists with the destination address",
__FUNCTION__);
return HDMI_RESULT_NACK;
} else if (err == -EAGAIN) {
ALOGE("%s: CEC line is busy, max retry count exceeded",
__FUNCTION__);
return HDMI_RESULT_BUSY;
} else {
return HDMI_RESULT_FAIL;
ALOGE("%s: Failed to send CEC message err: %zd - %s",
__FUNCTION__, err, strerror(int(-err)));
}
} else {
ALOGD_IF(DEBUG, "%s: Sent CEC message - %zd bytes written",
__FUNCTION__, err);
return HDMI_RESULT_SUCCESS;
}
}
void cec_receive_message(cec_context_t *ctx, char *msg, ssize_t len)
{
if(!ctx->system_control)
return;
char dump[128];
if(len > 0) {
hex_to_string(msg, len, dump);
ALOGD_IF(DEBUG, "%s: Message from driver: %s", __FUNCTION__, dump);
}
hdmi_event_t event;
event.type = HDMI_EVENT_CEC_MESSAGE;
event.dev = (hdmi_cec_device *) ctx;
// Remove initiator/destination from this calculation
event.cec.length = msg[CEC_OFFSET_FRAME_LENGTH] - 1;
event.cec.initiator = (cec_logical_address_t) msg[CEC_OFFSET_SENDER_ID];
event.cec.destination = (cec_logical_address_t) msg[CEC_OFFSET_RECEIVER_ID];
//Copy opcode and operand
size_t copy_size = event.cec.length > sizeof(event.cec.body) ?
sizeof(event.cec.body) : event.cec.length;
memcpy(event.cec.body, &msg[CEC_OFFSET_OPCODE],copy_size);
hex_to_string((char *) event.cec.body, copy_size, dump);
ALOGD_IF(DEBUG, "%s: Message to framework: %s", __FUNCTION__, dump);
ctx->callback.callback_func(&event, ctx->callback.callback_arg);
}
void cec_hdmi_hotplug(cec_context_t *ctx, int connected)
{
//Ignore unplug events when system control is disabled
if(!ctx->system_control && connected == 0)
return;
hdmi_event_t event;
event.type = HDMI_EVENT_HOT_PLUG;
event.dev = (hdmi_cec_device *) ctx;
event.hotplug.connected = connected ? HDMI_CONNECTED : HDMI_NOT_CONNECTED;
ctx->callback.callback_func(&event, ctx->callback.callback_arg);
}
static void cec_register_event_callback(const struct hdmi_cec_device* dev,
event_callback_t callback, void* arg)
{
ALOGD_IF(DEBUG, "%s: Registering callback", __FUNCTION__);
cec_context_t* ctx = (cec_context_t*)(dev);
ctx->callback.callback_func = callback;
ctx->callback.callback_arg = arg;
}
static void cec_get_version(const struct hdmi_cec_device* dev, int* version)
{
cec_context_t* ctx = (cec_context_t*)(dev);
*version = ctx->version;
ALOGD_IF(DEBUG, "%s: version: %d", __FUNCTION__, *version);
}
static void cec_get_vendor_id(const struct hdmi_cec_device* dev,
uint32_t* vendor_id)
{
cec_context_t* ctx = (cec_context_t*)(dev);
*vendor_id = ctx->vendor_id;
ALOGD_IF(DEBUG, "%s: vendor id: %u", __FUNCTION__, *vendor_id);
}
static void cec_get_port_info(const struct hdmi_cec_device* dev,
struct hdmi_port_info* list[], int* total)
{
ALOGD_IF(DEBUG, "%s: Get port info", __FUNCTION__);
cec_context_t* ctx = (cec_context_t*)(dev);
*total = NUM_HDMI_PORTS;
*list = ctx->port_info;
}
static void cec_set_option(const struct hdmi_cec_device* dev, int flag,
int value)
{
cec_context_t* ctx = (cec_context_t*)(dev);
switch (flag) {
case HDMI_OPTION_WAKEUP:
ALOGD_IF(DEBUG, "%s: Wakeup: value: %d", __FUNCTION__, value);
//XXX
break;
case HDMI_OPTION_ENABLE_CEC:
ALOGD_IF(DEBUG, "%s: Enable CEC: value: %d", __FUNCTION__, value);
cec_enable(ctx, value? 1 : 0);
break;
case HDMI_OPTION_SYSTEM_CEC_CONTROL:
ALOGD_IF(DEBUG, "%s: system_control: value: %d",
__FUNCTION__, value);
ctx->system_control = !!value;
break;
}
}
static void cec_set_audio_return_channel(const struct hdmi_cec_device* dev,
int port, int flag)
{
cec_context_t* ctx = (cec_context_t*)(dev);
ctx->arc_enabled = flag ? true : false;
ALOGD_IF(DEBUG, "%s: ARC flag: %d port: %d", __FUNCTION__, flag, port);
}
static int cec_is_connected(const struct hdmi_cec_device* dev, int port_id)
{
// Ignore port_id since we have only one port
int connected = 0;
cec_context_t* ctx = (cec_context_t*)(dev);
std::string connected_path;
char connected_data[MAX_SYSFS_DATA];
connected_path = ctx->fb_sysfs_path;
connected_path.append("/connected");
ssize_t err = read_node(connected_path.c_str(), connected_data);
connected = atoi(connected_data);
ALOGD_IF(DEBUG, "%s: HDMI at port %d is - %s", __FUNCTION__, port_id,
connected ? "connected":"disconnected");
if (err < 0)
return (int) err;
else
return connected;
}
static int cec_device_close(struct hw_device_t *dev)
{
ALOGD_IF(DEBUG, "%s: Close CEC HAL ", __FUNCTION__);
if (!dev) {
ALOGE("%s: NULL device pointer", __FUNCTION__);
return -EINVAL;
}
cec_context_t* ctx = (cec_context_t*)(dev);
cec_close_context(ctx);
free(dev);
return 0;
}
static int cec_enable(cec_context_t *ctx, int enable)
{
ssize_t err;
// Enable CEC
int value = enable ? 0x3 : 0x0;
err = write_int_to_node(ctx, "cec/enable", value);
if(err < 0) {
ALOGE("%s: Failed to toggle CEC: enable: %d",
__FUNCTION__, enable);
return (int) err;
}
ctx->enabled = enable;
return 0;
}
static void cec_init_context(cec_context_t *ctx)
{
ALOGD_IF(DEBUG, "%s: Initializing context", __FUNCTION__);
int err = -EINVAL;
cec_get_fb_node_number(ctx);
//Initialize ports - We support only one output port
ctx->port_info = new hdmi_port_info[NUM_HDMI_PORTS];
ctx->port_info[0].type = HDMI_OUTPUT;
ctx->port_info[0].port_id = 1;
ctx->port_info[0].cec_supported = 1;
//XXX: Enable ARC if supported
ctx->port_info[0].arc_supported = 0;
cec_get_physical_address((hdmi_cec_device *) ctx,
&ctx->port_info[0].physical_address );
ctx->version = 0x4;
ctx->vendor_id = 0xA47733;
cec_clear_logical_address((hdmi_cec_device_t*)ctx);
//Enable CEC - framework expects it to be enabled by default
cec_enable(ctx, true);
ALOGD("%s: CEC enabled", __FUNCTION__);
ctx->node_list.push_back("cec_msg_event");
ctx->node_list.push_back("hotplug_event");
ctx->node_list.push_back("exit_event");
err = populate_event_data(ctx, &ctx->event_data_list);
if (err < 0) {
ALOGE("Failed to populate poll parameters for monitoring HDMI CEC events. Exiting.");
cec_enable(ctx, false);
return;
}
ctx->hdmi_cec_monitor = std::thread(event_monitor, ctx);
}
static void cec_close_context(cec_context_t* ctx __unused)
{
ALOGD("%s: Closing context", __FUNCTION__);
uint64_t exit_value = 1;
long int write_size = write(ctx->exit_fd, &exit_value, sizeof(uint64_t));
if (write_size != sizeof(uint64_t)) {
ALOGE("Error triggering exit_fd (%d). write size = %ld, error = %s",
ctx->exit_fd, write_size, strerror(errno));
return;
}
if (ctx->hdmi_cec_monitor.joinable()) {
ctx->hdmi_cec_monitor.join();
}
}
static int cec_device_open(const struct hw_module_t* module,
const char* name,
struct hw_device_t** device)
{
ALOGD_IF(DEBUG, "%s: name: %s", __FUNCTION__, name);
int status = -EINVAL;
if (!strcmp(name, HDMI_CEC_HARDWARE_INTERFACE )) {
struct cec_context_t *dev;
dev = (cec_context_t *) calloc (1, sizeof(*dev));
if (dev) {
cec_init_context(dev);
//Setup CEC methods
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = HDMI_CEC_DEVICE_API_VERSION_1_0;
dev->device.common.module = const_cast<hw_module_t* >(module);
dev->device.common.close = cec_device_close;
dev->device.add_logical_address = cec_add_logical_address;
dev->device.clear_logical_address = cec_clear_logical_address;
dev->device.get_physical_address = cec_get_physical_address;
dev->device.send_message = cec_send_message;
dev->device.register_event_callback = cec_register_event_callback;
dev->device.get_version = cec_get_version;
dev->device.get_vendor_id = cec_get_vendor_id;
dev->device.get_port_info = cec_get_port_info;
dev->device.set_option = cec_set_option;
dev->device.set_audio_return_channel = cec_set_audio_return_channel;
dev->device.is_connected = cec_is_connected;
*device = &dev->device.common;
status = 0;
} else {
status = -EINVAL;
}
}
return status;
}
void event_monitor(cec_context_t* ctx) {
ALOGD("%s IN", __FUNCTION__);
int err = -EINVAL;
prctl(PR_SET_NAME, "cec_monitor", 0, 0, 0);
setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
while (!ctx->cec_exit_thread) {
err = poll(ctx->poll_fds.data(), (nfds_t)ctx->event_data_list.size(), -1);
if ( err <= 0 ) {
ALOGI("Failed to poll, Error %s", strerror(errno));
continue;
}
for (uint32_t event = 0; event < ctx->event_data_list.size(); event++) {
pollfd &poll_fd = ctx->poll_fds[event];
if (poll_fd.revents & POLLIN || poll_fd.revents & POLLPRI) {
ctx->event_data_list[event].event_parser(ctx, event);
}
}
}
cec_monitor_deinit(ctx);
ALOGD("%s OUT", __FUNCTION__);
return;
}
static int populate_event_data(cec_context_t* ctx, std::vector<eventData> *event_data_list) {
int err = -EINVAL;
ctx->poll_fds.resize(ctx->node_list.size());
for (uint32_t event = 0; event < ctx->node_list.size(); event++) {
const char *event_name = ctx->node_list.at(event).c_str();
eventData event_data;
event_data.event_name = event_name;
err = set_event_params(ctx, event, &event_data);
if (err < 0) {
ALOGE("Failed to set poll event parameters");
return err;
}
event_data_list->push_back(event_data);
}
return 0;
}
static int set_event_params(cec_context_t* ctx, uint32_t node_event, eventData *event_data) {
pollfd poll_fd;
poll_fd.fd = -EINVAL;
if (!strncmp(event_data->event_name, "cec_msg_event", strlen("cec_msg_event"))) {
char node_path[MAX_STRING_LENGTH] = {0};
snprintf(node_path, sizeof(node_path), "%s%d/%s", FB_PATH, ctx->fb_num, "cec/rd_msg");
poll_fd.fd = open(node_path, O_RDONLY);
if (poll_fd.fd < 0) {
ALOGE("Node open failed for display %d event %s error %s",
ctx->fb_num, "cec/rd_msg", strerror(errno));
return poll_fd.fd;
}
poll_fd.events |= POLLPRI | POLLERR;
// Read once on fd to clear the data
pread(poll_fd.fd, ctx->data, MAX_STRING_LENGTH, 0);
event_data->event_parser = &handle_cec_msg_event;
} else if (!strncmp(event_data->event_name, "hotplug_event", strlen("hotplug_event"))) {
if (!uevent_init(&poll_fd.fd)) {
ALOGE("Failed to register uevent for hotplug detection");
return -1;
}
poll_fd.events |= POLLIN | POLLERR;
event_data->event_parser = &handle_hdmihotplug_event;
} else if (!strncmp(event_data->event_name, "exit_event", strlen("exit_event"))) {
poll_fd.fd = eventfd(0, 0);
poll_fd.events |= POLLIN;
event_data->event_parser = &handle_exit_event;
ctx->exit_fd = poll_fd.fd;
}
ctx->poll_fds[node_event] = poll_fd;
return 0;
}
static void handle_cec_msg_event(cec_context_t* ctx, uint32_t node_event) {
if ((ctx->poll_fds[node_event].revents & POLLPRI) &&
(pread(ctx->poll_fds[node_event].fd, ctx->data, MAX_STRING_LENGTH, 0) > 0)) {
ALOGD_IF(DEBUG, "Handling CEC message %s", __FUNCTION__);
cec_receive_message(ctx, ctx->data, 0);
}
return;
}
static void handle_hdmihotplug_event(cec_context_t* ctx, uint32_t node_event) {
char uevent_data[PAGE_SIZE];
int count = 0;
if (ctx->poll_fds[node_event].revents & POLLIN) {
count = static_cast<int> (recv(ctx->poll_fds[node_event].fd, uevent_data,
(INT32(sizeof(uevent_data))) - 2, 0));
if ((count > 0) && (strcasestr(UEVENT_SWITCH_HDMI, uevent_data))) {
int connected = get_event_value(uevent_data, count, "SWITCH_STATE=");
ALOGD("HDMI CEC is %s", connected ? "connected" : "disconnected");
cec_hdmi_hotplug(ctx, connected);
}
}
return;
}
static void handle_exit_event(cec_context_t* ctx, uint32_t node_event) {
ALOGD_IF(DEBUG, "Enter %s", __FUNCTION__);
if (ctx->poll_fds[node_event].revents & POLLIN) {
ctx->cec_exit_thread = true;
}
return;
}
static void cec_monitor_deinit(cec_context_t* ctx) {
for (uint32_t event = 0; event < ctx->poll_fds.size(); event++) {
close(ctx->poll_fds[event].fd);
ctx->poll_fds[event].fd = -1;
}
}
static int get_event_value(const char *uevent_data, int length, const char *event_info) {
const char *iterator_str = uevent_data;
while (((iterator_str - uevent_data) <= length) && (*iterator_str)) {
const char *pstr = strstr(iterator_str, event_info);
if (pstr != NULL) {
return (atoi(iterator_str + strlen(event_info)));
}
iterator_str += strlen(iterator_str) + 1;
}
return -1;
}
/* Returns 0 on failure, 1 on success */
static int uevent_init(int *uevent_fd) {
struct sockaddr_nl addr;
int sz = 64*1024;
int s;
memset(&addr, 0, sizeof(addr));
addr.nl_family = AF_NETLINK;
addr.nl_pid = getpid();
addr.nl_groups = 0xffffffff;
s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if (s < 0)
return 0;
setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz));
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(s);
return 0;
}
*uevent_fd = s;
return (*uevent_fd > 0);
}
}; //namespace qhdmicec
// Standard HAL module, should be outside qhdmicec namespace
static struct hw_module_methods_t cec_module_methods = {
.open = qhdmicec::cec_device_open
};
hdmi_module_t HAL_MODULE_INFO_SYM = {
.common = {
.tag = HARDWARE_MODULE_TAG,
.version_major = 1,
.version_minor = 0,
.id = HDMI_CEC_HARDWARE_MODULE_ID,
.name = "QTI HDMI CEC module",
.author = "The Linux Foundation",
.methods = &cec_module_methods,
}
};