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| author | Ajit Pal Singh <quic_ajitpals@quicinc.com> | 2023-10-16 20:01:13 +0300 |
|---|---|---|
| committer | Jeffrey Hugo <quic_jhugo@quicinc.com> | 2023-10-27 19:05:42 +0300 |
| commit | 6216fb03f8bd0b1439e9e799a306bafd5b462622 (patch) | |
| tree | e9f59cf8c8cf251b41d01de7e23a1f007c1d3a0a /Documentation/accel/qaic/aic100.rst | |
| parent | bb8e97e26ce6437d2f57f37e8ba767a2b9cf0d65 (diff) | |
| download | linux-6216fb03f8bd0b1439e9e799a306bafd5b462622.tar.xz | |
accel/qaic: Add support for periodic timesync
Device and Host have a time synchronization mechanism that happens once
during boot when device is in SBL mode. After that, in mission-mode there
is no timesync. In an experiment after continuous operation, device time
drifted w.r.t. host by approximately 3 seconds per day. This drift leads
to mismatch in timestamp of device and Host logs. To correct this
implement periodic timesync in driver. This timesync is carried out via
QAIC_TIMESYNC_PERIODIC MHI channel.
Signed-off-by: Ajit Pal Singh <quic_ajitpals@quicinc.com>
Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Carl Vanderlip <quic_carlv@quicinc.com>
Reviewed-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231016170114.5446-2-quic_jhugo@quicinc.com
Diffstat (limited to 'Documentation/accel/qaic/aic100.rst')
| -rw-r--r-- | Documentation/accel/qaic/aic100.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/accel/qaic/aic100.rst b/Documentation/accel/qaic/aic100.rst index a5fef0869aab..2ed32be7ae25 100644 --- a/Documentation/accel/qaic/aic100.rst +++ b/Documentation/accel/qaic/aic100.rst @@ -225,6 +225,10 @@ of the defined channels, and their uses. | | | | device side logs with the host time | | | | | source. | +----------------+---------+----------+----------------------------------------+ +| QAIC_TIMESYNC | 22 & 23 | AMSS | Used to periodically synchronize | +| _PERIODIC | | | timestamps in the device side logs with| +| | | | the host time source. | ++----------------+---------+----------+----------------------------------------+ DMA Bridge ========== |