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soc/intel/common/acpi: Don't generate LPI constraints for disabled/hidden devices

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When walking the devicetree to generate the list of devices and minimum
sleep states, skip any devices which have the disable or hidden flags
set. This prevents adding entries for devices which are not present,
which are hidden (and likely to not have a min sleep state entry), or
generating duplicate entries in the case of PCIe remapping.

Any of these conditions are considered invalid by Windows and will
result in a BSOD with an INTERNAL_POWER_ERROR.

TEST=tested with rest of patch train

Change-Id: I06f64a72c82b9e03dc8af18700d24b3d10b7d3a7
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78518
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
This commit is contained in:
Matt DeVillier
2023-10-21 20:32:19 -05:00
committed by Felix Held
parent 80b5fe69f6
commit 06fe0d7828
1 changed files with 4 additions and 0 deletions
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4
src/soc/intel/common/block/acpi/pep.c
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@@ -169,6 +169,8 @@ static void acpi_lpi_get_constraints(void *unused)
if (size && states_arr) {
for (dev = all_devices; dev; dev = dev->next) {
if (!dev->enabled || dev->hidden)
continue;
if (get_min_sleep_state(dev, states_arr, size)
!= ACPI_DEVICE_SLEEP_NONE)
num_entries++;
@@ -182,6 +184,8 @@ static void acpi_lpi_get_constraints(void *unused)
size_t cpu_index = 0;
for (dev = all_devices; dev; dev = dev->next) {
if (!dev->enabled || dev->hidden)
continue;
min_sleep_state = get_min_sleep_state(dev, states_arr, size);
if (min_sleep_state == ACPI_DEVICE_SLEEP_NONE)
continue;