diff options
| author | Tarun Tuli <taruntuli@google.com> | 2023-06-21 19:41:17 +0000 |
|---|---|---|
| committer | Nick Vaccaro <nvaccaro@google.com> | 2023-06-22 16:30:46 +0000 |
| commit | 11734053fb62e9d531449995271aeb295133c0da (patch) | |
| tree | b20839f8c831c24dce704579c8ae1d0bcae85cc0 /src/mainboard/google | |
| parent | 8f6af5ba13ed496ee715d7387008cd55f57b82cb (diff) | |
mb/google/brya/acpi: Set power down delay to 2ms after PEXVDD
Reduce the delay between PEXVDD and NVVDD from 3ms to 2ms
during power down sequences. The hardware discharge is
aggressive enough that we can safely optimize this.
BUG=b:288267305
TEST=build and measured delay is acceptable
Signed-off-by: Tarun Tuli <taruntuli@google.com>
Change-Id: I7c65301414044487e50bbbca618c4e602e571cfb
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76051
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/brya/acpi/power.asl | 4 | ||||
| -rw-r--r-- | src/mainboard/google/brya/variants/hades/variant.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/src/mainboard/google/brya/acpi/power.asl b/src/mainboard/google/brya/acpi/power.asl index a51bcaa3e6..7eb31d8f3b 100644 --- a/src/mainboard/google/brya/acpi/power.asl +++ b/src/mainboard/google/brya/acpi/power.asl @@ -140,7 +140,7 @@ Method (GC6I, 0, Serialized) #if CONFIG(BOARD_GOOGLE_AGAH) Sleep (10) #else - Sleep (3) + Sleep (2) #endif /* Deassert EN_PPVAR_GPU_NVVDD */ @@ -290,7 +290,7 @@ Method (PGOF, 0, Serialized) #if CONFIG(BOARD_GOOGLE_AGAH) Sleep (10) #else - Sleep (3) + Sleep (2) #endif /* Ramp down NVVDD */ diff --git a/src/mainboard/google/brya/variants/hades/variant.c b/src/mainboard/google/brya/variants/hades/variant.c index 0864ec007f..48e2652e8e 100644 --- a/src/mainboard/google/brya/variants/hades/variant.c +++ b/src/mainboard/google/brya/variants/hades/variant.c @@ -61,7 +61,7 @@ static struct power_rail_sequence gpu_on_seq[] = { /* In GCOFF entry order (i.e., power-off order) */ static struct power_rail_sequence gpu_off_seq[] = { { "FBVDD", FBVDD_PWR_EN, false, FBVDD_PG, 0,}, - { "PEXVDD", PEXVDD_PWR_EN, false, PEXVDD_PG, 3,}, + { "PEXVDD", PEXVDD_PWR_EN, false, PEXVDD_PG, 2,}, { "NVVDD+MSVDD", NVVDD_PWR_EN, false, NVVDD_PG, 2,}, { "GPU 3.3V", GPU_3V3_PWR_EN, false, GPU_3V3_PG, 4,}, { "GPU 1.8V", GPU_1V8_PWR_EN, false, GPU_1V8_PG, 0,}, |