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-rw-r--r--src/soc/intel/common/block/acpi/acpi/pep.asl20
1 files changed, 19 insertions, 1 deletions
diff --git a/src/soc/intel/common/block/acpi/acpi/pep.asl b/src/soc/intel/common/block/acpi/acpi/pep.asl
index 64d23c1061..9e39a8fedd 100644
--- a/src/soc/intel/common/block/acpi/acpi/pep.asl
+++ b/src/soc/intel/common/block/acpi/acpi/pep.asl
@@ -30,9 +30,27 @@ Device(PEPD)
}
/*
* Function 1 - Get Device Constraints
+ *
+ * Device constraints for low power states (may be used for debugging).
+ * For now there is only one disabled dummy device, because Windows
+ * expects at least one device and crashes without it with a bluescreen
+ * (`INTERNAL_POWER_ERROR`). Returning an empty package does not work.
*/
If(Arg2 == PEPD_DSM_LPI_GET_DEVICE_CONSTRAINTS) {
- Return(Package(5) {0, Ones, Ones, Ones, Ones})
+ Return (Package() {
+ Package() {
+ "\\DUMY", /* \DUMY - not existent */
+ 0, /* disabled, no constraints */
+ Package() {
+ 0, /* revision */
+ Package() {
+ 0xff, /* apply to all LPIT states */
+ 0 /* minimum D-state */
+ }
+ }
+ }
+ }
+ )
}
/*
* Function 2 - Get Crash Dump Device