From d6b88ce2eb9d2698eb24451eb92c0a1649b17bb1 Mon Sep 17 00:00:00 2001
From: Richard Gong <richard.gong@amd.com>
Date: Wed, 22 Sep 2021 08:31:16 -0500
Subject: [PATCH] ACPI: processor idle: Allow playing dead in C3 state
Git-commit: d6b88ce2eb9d2698eb24451eb92c0a1649b17bb1
Patch-mainline: v5.16-rc1
References: git-fixes
When some cores are disabled on AMD platforms, the system will no longer
be able to enter suspend-to-idle s0ix.
Update to allow playing dead in C3 state so that the CPUs can enter the
deepest state on AMD platforms.
Buglink: https://gitlab.freedesktop.org/drm/amd/-/issues/1708
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Richard Gong <richard.gong@amd.com>
[ rjw: Fixed coding style ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/acpi/processor_idle.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f37fba9e5ba0..76ef1bcc8848 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -789,7 +789,8 @@ static int acpi_processor_setup_cstates(struct acpi_processor *pr)
state->enter = acpi_idle_enter;
state->flags = 0;
- if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2) {
+ if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2 ||
+ cx->type == ACPI_STATE_C3) {
state->enter_dead = acpi_idle_play_dead;
drv->safe_state_index = count;
}
--
2.31.1