soc/amd/picasso/acpi: Add a wrapper method WAL1 for calling ALIB function 1

ALIB function 1 needs to be called every time there is a change in
AC/DC state of the system. This change adds a wrapper method that can
be called by PNOT (method to notify system power state change) to
report to ALIB that system power state has changed i.e. AC <-> DC.

Additionally, this change drops the call to ALIB from _INI method
since the PWRS object might not be initialized correctly at that
point. Instead EC makes a call to PNOT when PWRS is initialized.

This wrapper also fixes the value of power state being passed into
ALIB. ALIB expects 0 = AC and 1 = DC. On the other hand, PWRS reports
1 as AC and 0 as DC. WAL1() takes care of inverting the PWRS state
before passing into ALIB.

BUG=b:157752693
TEST=Verified that WAL1() gets called on AC connect/disconnect.

Steps followed:
$ echo 1 > /sys/module/acpi/parameters/aml_debug_output
$ dmesg -w | grep ACPI
[   76.306947] ACPI Debug:  "EC: AC DISCONNECTED"
[   76.307064] ACPI Debug:  "ALIB call: func 1 params 0x03 0x00 0x01"
[   82.264946] ACPI Debug:  "EC: GOT PD EVENT"
[   82.539833] ACPI Debug:  "EC: GOT PD EVENT"
[   82.753721] ACPI Debug:  "EC: GOT PD EVENT"
[   82.843676] ACPI Debug:  "EC: GOT PD EVENT"
[   82.970596] ACPI Debug:  "EC: AC CONNECTED"
[   82.970659] ACPI Debug:  "ALIB call: func 1 params 0x03 0x00 0x00"
[   83.047598] ACPI Debug:  "EC: GOT PD EVENT"
[   84.804733] ACPI Debug:  "EC: GOT PD EVENT"
[   86.317934] ACPI Debug:  "EC: GOT PD EVENT"
[   86.385920] ACPI Debug:  "EC: GOT PD EVENT"
[   86.515830] ACPI Debug:  "EC: AC DISCONNECTED"
[   86.515922] ACPI Debug:  "ALIB call: func 1 params 0x03 0x00 0x01"
[   90.089062] ACPI Debug:  "EC: GOT PD EVENT"
[   90.357914] ACPI Debug:  "EC: GOT PD EVENT"
[   90.573812] ACPI Debug:  "EC: GOT PD EVENT"
[   90.662744] ACPI Debug:  "EC: GOT PD EVENT"
[   90.788706] ACPI Debug:  "EC: AC CONNECTED"
[   90.788835] ACPI Debug:  "ALIB call: func 1 params 0x03 0x00 0x00"
[   90.865675] ACPI Debug:  "EC: GOT PD EVENT"
[   92.621793] ACPI Debug:  "EC: GOT PD EVENT"

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I1f2ade28ca35378ebf4647d8df3d2ea4d0b08096
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42297
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

0 files changed, 0 insertions, 0 deletions