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| author |   Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2017-10-10 18:11:15 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2017-10-13 21:05:56 +0200 |
| commit | 88fa2dfb075a20c3464e3d303c57dd8ced9e8309 (patch) | |
| tree | 21e4be535e1e55bb18b5d2f6b0195f6b917277a6 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | i2c: piix4: Fix SMBus port selection for AMD Family 17h chips (diff) | |
| download | wireguard-linux-88fa2dfb075a20c3464e3d303c57dd8ced9e8309.tar.xz wireguard-linux-88fa2dfb075a20c3464e3d303c57dd8ced9e8309.zip | |
i2c: piix4: Disable completely the IMC during SMBUS_BLOCK_DATA
SMBUS_BLOCK_DATA transactions might fail due to a race condition with
the IMC (Integrated Micro Controller), even when the IMC semaphore
is used.
This bug has been reported and confirmed by AMD, who suggested as a
solution an IMC firmware upgrade (obtained via BIOS update) and
disabling the IMC during SMBUS_BLOCK_DATA transactions.
Even without the IMC upgrade, the SMBUS is much more stable with this
patch.
Tested on a Bettong-alike board.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions