scarlet: Change FIFO settings

Similar to CL:1134494

Reduce the amount of datum to trigger a FIFO interruption.
To improve timestamping in the kernel, we need to send a
continuous stream of data to the host.
In case of CTS batch test, we may not send anything for x100ms;
the filter will not have any data to estimate the drift and
may output invalid timestamps.

Change the FIFO threshold to try to have more than ~10 samples
in a singe batch. We still need a long FIFO when the EC is busy and can
not process events from the sensor.

BUG=b:73551961
BRANCH=scarlet
TEST=in CtsHardwareTestCases, tests SensorBatchingTests pass more reliably.

Change-Id: I254230498fcf270dfa303cf5eacec5d8abdd1225
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1137474
Reviewed-by: Philip Chen <philipchen@chromium.org>

0 files changed, 0 insertions, 0 deletions