On Wed, Sep 22, 2021 at 3:31 PM Richard Gong <richard.gong@xxxxxxx> wrote: > > 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@xxxxxxx> > Signed-off-by: Richard Gong <richard.gong@xxxxxxx> > --- > 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..61d5a72d218e 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; > } > -- Tentatively applied as 5.16 material, but have you done any research on why this restriction has been there in the first place?
