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author | Ricardo Ribalda <ribalda@chromium.org> | 2020-12-14 23:33:42 +0100 |
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committer | Furquan Shaikh <furquan@google.com> | 2020-12-16 06:29:20 +0000 |
commit | 752fc6026f786818681a02c4144268a3a1a03391 (patch) | |
tree | fe61b1d2407e1dd112169d64319e5c70157f263b /src/drivers/maxim | |
parent | 1a8c20324aea1795c9bb4dbb2d162d1ba19f5287 (diff) |
mb/google/poppy: Fix race condition in acpi camera_pmic
Newer kernels can re-schedule new acpi command calls during a Sleep().
This causes that the following trace fails to detect the cameras:
[ 15.764725] drivers/acpi/power.c:358 Power resource [OVFI] turned on start
[ 15.772180] drivers/acpi/power.c:358 Power resource [OVTH] turned on start
[ 15.834970] drivers/acpi/power.c:362 Power resource [OVFI] turned on start
[ 15.852456] drivers/acpi/power.c:415 Power resource [OVFI] turned off start
[ 15.955987] drivers/acpi/power.c:420 Power resource [OVFI] turned off end
ERROR!!
[ 16.030896] drivers/acpi/power.c:362 Power resource [OVTH] turned on end
Which can be triggered more frequently if the Sleep() commands in OVTH
_ON Method are increased.
To avoid the race condition, we create a new Power Resource that
handles the common resources of both cameras and make both cameras
depend on that resource. This also simplifies the acpi table by removing
a Mutex.
BRANCH=poppy
BUG=b:171955583
TEST=while true; do if ssh $DUT "dmesg | grep \"failed to find sensor\" "; then break; fi; ssh $DUT reboot; sleep 30 ; done
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Change-Id: I25df0225699759c1828b8791c5bdee66529858a7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48631
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/drivers/maxim')
0 files changed, 0 insertions, 0 deletions