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| author | Enrico Granata <egranata@chromium.org> | 2019-05-24 10:33:16 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-05-29 00:26:31 +0000 |
| commit | 67ffa1b839b04cfee4bd62de2ffbda76cbbadd79 (patch) | |
| tree | 451df53508b6aec8d2b813e4496188200fc78d17 | |
| parent | feadddbd783ec153f12009f65dbdacd0275d3eba (diff) | |
| download | chrome-ec-67ffa1b839b04cfee4bd62de2ffbda76cbbadd79.tar.gz | |
nami: Disable tight timestamps
Nami boards do not have a dedicated GPIO for MKBP events
between EC and AP. On boards without this hardware support, the
tight timestamps feature cannot be reliably supported due to
issues with the performance of the ACPI SCI chain, compared to
a dedicated interrupt.
Disabling tight_timestamps restores legacy behavior that is known
to fare better with sensors events over SCI.
BUG=b:123700100,b:133433007
BRANCH=nami
TEST=tight_timestamps is 0
testSensorTimeStamps passes 8/10 tries
Change-Id: I4b5816eb09e635a3d167a4b8accefab1552a40c4
Signed-off-by: Enrico Granata <egranata@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1629315
Reviewed-by: Kazuhiro Inaba <kinaba@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
| -rw-r--r-- | board/nami/board.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/board/nami/board.h b/board/nami/board.h index 5ec59c24bf..41d6070317 100644 --- a/board/nami/board.h +++ b/board/nami/board.h @@ -150,6 +150,8 @@ /* KB backlight driver */ #define CONFIG_LED_DRIVER_LM3509 +#undef CONFIG_SENSOR_TIGHT_TIMESTAMPS + /* FIFO size is in power of 2. */ #define CONFIG_ACCEL_FIFO 512 |