diff options
| author | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2022-09-01 11:48:38 -0600 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-09-12 12:31:24 +0000 |
| commit | 7f287d23bc05606a805a61bc193d2a78c388f620 (patch) | |
| tree | e6d967474757cd7642b5a82c5ee26a8facc5312b /src/mainboard/google | |
| parent | d6ac209c74a2ce8d0d7f07390f62d447c02fedf3 (diff) | |
mb/google/brya/acpi: Move dGPU power checks earlier
Linux always "turns on" a PowerResource when it boots, regardless of
_STA, so the _ON routine should be idempotent. In this case, it all is,
except for the LTR restore, which would restore a value of 0 when _ON is
run the first time, which means that LTR is disabled on the root port
from then on, as the save/restore routines will keep saving/restoring
that 0. THis patch fixes the problem by moving the power checks from
PGON/PGOF to GCOO/GCOI.
BUG=b:244409563
TEST=boot agah and verify that LTR is still enabled on the root port
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I4ed78323608eede5b8310598f1f1115497ab2b5b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67278
Reviewed-by: Cliff Huang <cliff.huang@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/brya/acpi/power.asl | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/src/mainboard/google/brya/acpi/power.asl b/src/mainboard/google/brya/acpi/power.asl index 2654394389..a384297010 100644 --- a/src/mainboard/google/brya/acpi/power.asl +++ b/src/mainboard/google/brya/acpi/power.asl @@ -182,12 +182,6 @@ Method (GC6O, 0, Serialized) /* GCOFF exit sequence */ Method (PGON, 0, Serialized) { - If (GPPS == GPU_POWER_STATE_ON) - { - Printf ("PGON: GPU already on") - Return - } - Local0 = Timer - GCOT If (Local0 < MIN_OFF_TIME_TIMERS) { @@ -234,12 +228,6 @@ Method (PGON, 0, Serialized) /* GCOFF entry sequence */ Method (PGOF, 0, Serialized) { - If (GPPS == GPU_POWER_STATE_OFF) - { - Printf ("GPU already off") - Return - } - /* Assert PERST# */ CTXS (GPIO_GPU_PERST_L) @@ -278,6 +266,12 @@ Method (PGOF, 0, Serialized) /* GCOFF Out, i.e. full power-on sequence */ Method (GCOO, 0, Serialized) { + If (GPPS == GPU_POWER_STATE_ON) + { + Printf ("PGON: GPU already on") + Return + } + SRCC (SRCCLK_ENABLE) PGON () \_SB.PCI0.PEG0.LD23 () @@ -310,9 +304,14 @@ Method (GCOO, 0, Serialized) /* GCOFF In, i.e. full power-off sequence */ Method (GCOI, 0, Serialized) { + If (GPPS == GPU_POWER_STATE_OFF) + { + Printf ("GPU already off") + Return + } + /* Save the PEG port's LTR setting */ SLTR = LREN - \_SB.PCI0.PEG0.DL23 () PGOF () SRCC (SRCCLK_DISABLE) |