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| author | Enrico Granata <egranata@chromium.org> | 2019-03-14 17:02:47 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-05-29 00:26:30 +0000 |
| commit | feadddbd783ec153f12009f65dbdacd0275d3eba (patch) | |
| tree | e29a03d0301093183ea9ff94447304ae80469bbf | |
| parent | 29aa5b6b8e11c16f55f44afc2d15fb951afdf960 (diff) | |
| download | chrome-ec-feadddbd783ec153f12009f65dbdacd0275d3eba.tar.gz | |
motion: Split configuration for sensor FIFO and tight timestamps
CONFIG_ACCEL_FIFO was being used both to control the size of the
sensor FIFO, and the notion of tight timestamps. The latter is
related to the format the EC uses to send sensor event timestamps
and not to the size of the FIFO.
Split this latter portion into its own configuration flag,
CONFIG_SENSOR_TIGHT_TIMESTAMPS.
This defaults to enabled, and should be turned on for all new
boards. It will be selectively disabled on a few boards where
the AP-side filtering this enables does not perform optimally
due to jitter issues.
BUG=b:123700100
BRANCH=rammus
TEST=observe tight_timestamps on the sensor_ring device in kernel
be enabled/disabled depending on whether CONFIG_SENSOR_TIGHT_TIMESTAMPS
is #undef'ed or not
Change-Id: I806ba6bb45a0007512afec9151c57c60d30fd604
Signed-off-by: Enrico Granata <egranata@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1524666
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1629314
Reviewed-by: Kazuhiro Inaba <kinaba@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
| -rw-r--r-- | common/ec_features.c | 2 | ||||
| -rw-r--r-- | common/motion_sense.c | 2 | ||||
| -rw-r--r-- | include/config.h | 24 |
3 files changed, 27 insertions, 1 deletions
diff --git a/common/ec_features.c b/common/ec_features.c index 245154630a..ee861dbf20 100644 --- a/common/ec_features.c +++ b/common/ec_features.c @@ -125,7 +125,7 @@ uint32_t get_feature_flags1(void) #ifdef CONFIG_CEC | EC_FEATURE_MASK_1(EC_FEATURE_CEC) #endif -#ifdef CONFIG_ACCEL_FIFO +#ifdef CONFIG_SENSOR_TIGHT_TIMESTAMPS | EC_FEATURE_MASK_1(EC_FEATURE_MOTION_SENSE_TIGHT_TIMESTAMPS) #endif ; diff --git a/common/motion_sense.c b/common/motion_sense.c index 1fe3aeb064..7b09b1a43e 100644 --- a/common/motion_sense.c +++ b/common/motion_sense.c @@ -176,7 +176,9 @@ void motion_sense_fifo_add_data(struct ec_response_motion_sensor_data *data, struct motion_sensor_t *sensor, int valid_data, uint32_t time) { +#ifdef CONFIG_SENSOR_TIGHT_TIMESTAMPS motion_sense_insert_timestamp(time); +#endif motion_sense_fifo_add_unit(data, sensor, valid_data); } diff --git a/include/config.h b/include/config.h index 71038e0c25..b04abeb07c 100644 --- a/include/config.h +++ b/include/config.h @@ -119,6 +119,30 @@ /* Specify type of Gyrometers attached. */ #undef CONFIG_GYRO_L3GD20H +/* + * If this is defined, motion_sense sends sensor events to the AP in the format + * +-----------+ + * | Timestamp | + * | Payload | + * | Timestamp | + * | Payload | + * | ... | + * +-----------+ + * + * If this is not defined, the events will be sent in the format + * +-----------+ + * | Payload | + * | Payload | + * | Payload | + * | ... | + * | Timestamp | + * +-----------+ + * + * The former format enables improved filtering of sensor event timestamps on + * the AP, but comes with stricter jitter requirements. + */ +#define CONFIG_SENSOR_TIGHT_TIMESTAMPS + /* Sync event driver */ #undef CONFIG_SYNC |