#include <ctype.h>
#include <fcntl.h>
#include <pthread.h>
+#include <time.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include <utils/Log.h>
* */
#define THREAD_REPORT_TAG_BASE 0x00010000
+/* When polling try to compensate for the iio overhead in
+ * order to try to get a frequency closer to the advertised one
+ */
+#define OVERHEAD_THRESHOLD 0.97
+#define ENABLE_BUFFER_RETRIES 10
+#define ENABLE_BUFFER_RETRY_DELAY_MS 10
+
static int enable_buffer(int dev_num, int enabled)
{
char sysfs_path[PATH_MAX];
+ int ret, retries, millisec;
+ struct timespec req = {0};
+
+ retries = ENABLE_BUFFER_RETRIES;
+ millisec = ENABLE_BUFFER_RETRY_DELAY_MS;
+ req.tv_sec = 0;
+ req.tv_nsec = millisec * 1000000L;
sprintf(sysfs_path, ENABLE_PATH, dev_num);
- /* Low level, non-multiplexed, enable/disable routine */
- return sysfs_write_int(sysfs_path, enabled);
+ while (retries--) {
+ /* Low level, non-multiplexed, enable/disable routine */
+ ret = sysfs_write_int(sysfs_path, enabled);
+ if (ret > 0)
+ break;
+
+ ALOGE("Failed enabling buffer, retrying");
+ nanosleep(&req, (struct timespec *)NULL);
+ }
+
+ if (ret < 0) {
+ ALOGE("Could not enable buffer\n");
+ return -EIO;
+ }
+
+ return 0;
}
struct timespec target_time;
int64_t period;
- ALOGV("Entering data acquisition thread for sensor %d\n", s);
+ ALOGI("Entering data acquisition thread S%d (%s): rate(%f), minDelay(%ld), maxDelay(%ld)\n",
+ s, sensor_info[s].friendly_name, sensor_info[s].sampling_rate,
+ sensor_desc[s].minDelay, sensor_desc[s].maxDelay);
if (s < 0 || s >= sensor_count) {
ALOGE("Invalid sensor handle!\n");
period = (int64_t) (1000000000.0/ sensor_info[s].sampling_rate);
-
+ period = period * OVERHEAD_THRESHOLD;
time_add(&target_time, &entry_time, period);
/*
free(sensor_info[s].history);
sensor_info[s].history = NULL;
sensor_info[s].history_size = 0;
+ if (sensor_info[s].history_sum) {
+ free(sensor_info[s].history_sum);
+ sensor_info[s].history_sum = NULL;
+ }
}
return 0;
}
+static int is_fast_accelerometer (int s)
+{
+ /*
+ * Some games don't react well to accelerometers using any-motion
+ * triggers. Even very low thresholds seem to trip them, and they tend
+ * to request fairly high event rates. Favor continuous triggers if the
+ * sensor is an accelerometer and uses a sampling rate of at least 25.
+ */
+ int catalog_index = sensor_info[s].catalog_index;
+
+ if (sensor_catalog[catalog_index].type != SENSOR_TYPE_ACCELEROMETER)
+ return 0;
+
+ if (sensor_info[s].sampling_rate < 25)
+ return 0;
+
+ return 1;
+}
+
+
static void enable_motion_trigger (int dev_num)
{
/*
sensor_info[s].enable_count &&
sensor_info[s].num_channels &&
(!sensor_info[s].motion_trigger_name[0] ||
- !sensor_info[s].report_initialized)
+ !sensor_info[s].report_initialized ||
+ is_fast_accelerometer(s))
)
return; /* Nope */
{
int64_t maxTs, period;
- if (sensor_info[s].report_ts && sensor_info[s].sampling_rate) {
+ /*
+ * A bit of a hack to please a bunch of cts tests. They
+ * expect the timestamp to be exacly according to the set-up
+ * frequency but if we're simply getting the timestamp at hal level
+ * this may not be the case. Perhaps we'll get rid of this when
+ * we'll be reading the timestamp from the iio channel for all sensors
+ */
+ if (sensor_info[s].report_ts && sensor_info[s].sampling_rate &&
+ REPORTING_MODE(sensor_desc[s].flags) == SENSOR_FLAG_CONTINUOUS_MODE)
+ {
period = (int64_t) (1000000000LL / sensor_info[s].sampling_rate);
maxTs = sensor_info[s].report_ts + period;
sensor_info[s].report_ts = (ts < maxTs ? ts : maxTs);
if (!sensor_info[s].enable_count)
continue;
- /* If the sensor can generate duplicates, leave it alone */
- if (!(sensor_info[s].quirks & QUIRK_TERSE_DRIVER) &&
- sensor_info[s].selected_trigger !=
+ /* If the sensor is continuously firing, leave it alone */
+ if ( sensor_info[s].selected_trigger !=
sensor_info[s].motion_trigger_name)
continue;
*/
for (s=0; s<sensor_count; s++)
if (sensor_info[s].enable_count &&
- ((sensor_info[s].quirks & QUIRK_TERSE_DRIVER) ||
- sensor_info[s].selected_trigger ==
- sensor_info[s].motion_trigger_name) &&
- sensor_info[s].sampling_rate) {
+ sensor_info[s].selected_trigger ==
+ sensor_info[s].motion_trigger_name &&
+ sensor_info[s].sampling_rate) {
period = (int64_t) (1000000000.0 /
sensor_info[s].sampling_rate);
float cur_sampling_rate; /* Currently used sampling rate */
int per_sensor_sampling_rate;
int per_device_sampling_rate;
- int32_t min_delay = sensor_desc[s].minDelay;
- float max_supported_rate = (min_delay != 0 && min_delay != -1) ? (1000000.0f / min_delay) : 0;
+ int32_t min_delay_us = sensor_desc[s].minDelay;
+ max_delay_t max_delay_us = sensor_desc[s].maxDelay;
+ float min_supported_rate = max_delay_us ? (1000000.0f / max_delay_us) : 1;
+ float max_supported_rate =
+ (min_delay_us && min_delay_us != -1) ? (1000000.0f / min_delay_us) : 0;
char freqs_buf[100];
char* cursor;
int n;
* Artificially limit ourselves to 1 Hz or higher. This is mostly to
* avoid setting up the stage for divisions by zero.
*/
- if (new_sampling_rate < 1)
- new_sampling_rate = 1;
+ if (new_sampling_rate < min_supported_rate)
+ new_sampling_rate = min_supported_rate;
if (max_supported_rate &&
new_sampling_rate > max_supported_rate) {
sysfs_write_float(sysfs_path, new_sampling_rate);
+ /* Switch back to continuous sampling for accelerometer based games */
+ if (is_fast_accelerometer(s) && sensor_info[s].selected_trigger !=
+ sensor_info[s].init_trigger_name)
+ setup_trigger(s, sensor_info[s].init_trigger_name);
+
if (trig_sensors_per_dev[dev_num])
enable_buffer(dev_num, 1);
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