diff options
Diffstat (limited to 'src/mainboard/google/brya')
| -rw-r--r-- | src/mainboard/google/brya/acpi/power.asl | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/mainboard/google/brya/acpi/power.asl b/src/mainboard/google/brya/acpi/power.asl index 55f8dbda8f..618030b4fd 100644 --- a/src/mainboard/google/brya/acpi/power.asl +++ b/src/mainboard/google/brya/acpi/power.asl @@ -19,6 +19,9 @@ #define GC6_DEFER_TYPE_EXIT_GC6 3 +/* 250ms in "Timer" units (i.e. 100ns increments) */ +#define MIN_OFF_TIME_TIMERS 2500000 + /* Optimus Power Control State */ Name (OPCS, OPTIMUS_POWER_CONTROL_DISABLE) @@ -45,6 +48,8 @@ Name (DFEN, 0) Name (DFCI, 0) /* Deferred GC6 Exit control */ Name (DFCO, 0) +/* GCOFF Timer */ +Name (GCOT, 0) /* "GC6 In", i.e. GC6 Entry Sequence */ Method (GC6I, 0, Serialized) @@ -115,6 +120,14 @@ Method (PGON, 0, Serialized) Return } + Local0 = Timer - GCOT + If (Local0 < MIN_OFF_TIME_TIMERS) + { + Local1 = (MIN_OFF_TIME_TIMERS - Local0) / 10000 + Printf("Sleeping %o to ensure min GCOFF time", Local1) + Sleep (Local1) + } + /* Assert PERST# */ \_SB.PCI0.CTXS (GPIO_GPU_PERST_L) @@ -189,6 +202,8 @@ Method (PGOF, 0, Serialized) \_SB.PCI0.CTXS (GPIO_1V8_PWR_EN) GPPL (GPIO_1V8_PG, 0, 20) + GCOT = Timer + GPPS = GPU_POWER_STATE_OFF Printf ("GPU sequenced off") } |