* [PATCH] ACPI: PM: s2idle: Invoke _PTS for s2idle
@ 2021-04-19 9:07 Kai-Heng Feng
2021-04-19 11:34 ` Rafael J. Wysocki
0 siblings, 1 reply; 3+ messages in thread
From: Kai-Heng Feng @ 2021-04-19 9:07 UTC (permalink / raw)
To: rjw; +Cc: Kai-Heng Feng, Len Brown, open list:ACPI, open list
HP EliteBook 840 G8 reboots on s2idle resume, and HP EliteBook 845 G8
wakes up immediately on s2idle. Both are caused by the XMM7360 WWAN PCI
card.
There's a WWAN specific method to really turn off the WWAN via EC:
Method (_PTS, 1, NotSerialized) // _PTS: Prepare To Sleep
{
...
If (CondRefOf (\_SB.PCI0.GP12.PTS))
{
\_SB.PCI0.GP12.PTS (Arg0)
}
...
}
Scope (_SB.PCI0.GP12)
{
...
Method (PTS, 1, Serialized)
{
If (^^LPCB.EC0.ECRG)
{
If ((PDID == 0xFFFF))
{
Return (Zero)
}
POFF ()
SGIO (WWBR, One)
Sleep (0x1E)
Acquire (^^LPCB.EC0.ECMX, 0xFFFF)
^^LPCB.EC0.WWP = One
Release (^^LPCB.EC0.ECMX)
Sleep (0x01F4)
}
Return (Zero)
}
...
}
So let's also invok _PTS for s2idle.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
drivers/acpi/sleep.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 09fd13757b65..7e84b4b09919 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -698,6 +698,7 @@ int acpi_s2idle_prepare(void)
}
acpi_enable_wakeup_devices(ACPI_STATE_S0);
+ acpi_enter_sleep_state_prep(ACPI_STATE_S0);
/* Change the configuration of GPEs to avoid spurious wakeup. */
acpi_enable_all_wakeup_gpes();
--
2.30.2
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] ACPI: PM: s2idle: Invoke _PTS for s2idle
2021-04-19 9:07 [PATCH] ACPI: PM: s2idle: Invoke _PTS for s2idle Kai-Heng Feng
@ 2021-04-19 11:34 ` Rafael J. Wysocki
2021-04-19 12:17 ` Kai-Heng Feng
0 siblings, 1 reply; 3+ messages in thread
From: Rafael J. Wysocki @ 2021-04-19 11:34 UTC (permalink / raw)
To: Kai-Heng Feng; +Cc: Rafael J. Wysocki, Len Brown, open list:ACPI, open list
On Mon, Apr 19, 2021 at 11:08 AM Kai-Heng Feng
<kai.heng.feng@canonical.com> wrote:
>
> HP EliteBook 840 G8 reboots on s2idle resume, and HP EliteBook 845 G8
> wakes up immediately on s2idle. Both are caused by the XMM7360 WWAN PCI
> card.
>
> There's a WWAN specific method to really turn off the WWAN via EC:
> Method (_PTS, 1, NotSerialized) // _PTS: Prepare To Sleep
> {
> ...
> If (CondRefOf (\_SB.PCI0.GP12.PTS))
> {
> \_SB.PCI0.GP12.PTS (Arg0)
> }
> ...
> }
>
> Scope (_SB.PCI0.GP12)
> {
> ...
> Method (PTS, 1, Serialized)
> {
> If (^^LPCB.EC0.ECRG)
> {
> If ((PDID == 0xFFFF))
> {
> Return (Zero)
> }
>
> POFF ()
> SGIO (WWBR, One)
> Sleep (0x1E)
> Acquire (^^LPCB.EC0.ECMX, 0xFFFF)
> ^^LPCB.EC0.WWP = One
> Release (^^LPCB.EC0.ECMX)
> Sleep (0x01F4)
> }
>
> Return (Zero)
> }
> ...
> }
>
> So let's also invok _PTS for s2idle.
>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---
> drivers/acpi/sleep.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
> index 09fd13757b65..7e84b4b09919 100644
> --- a/drivers/acpi/sleep.c
> +++ b/drivers/acpi/sleep.c
> @@ -698,6 +698,7 @@ int acpi_s2idle_prepare(void)
> }
>
> acpi_enable_wakeup_devices(ACPI_STATE_S0);
> + acpi_enter_sleep_state_prep(ACPI_STATE_S0);
The system is in S0 already at this point, so not really.
Please use a quirk to address this.
>
> /* Change the configuration of GPEs to avoid spurious wakeup. */
> acpi_enable_all_wakeup_gpes();
> --
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] ACPI: PM: s2idle: Invoke _PTS for s2idle
2021-04-19 11:34 ` Rafael J. Wysocki
@ 2021-04-19 12:17 ` Kai-Heng Feng
0 siblings, 0 replies; 3+ messages in thread
From: Kai-Heng Feng @ 2021-04-19 12:17 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: Rafael J. Wysocki, Len Brown, open list:ACPI, open list
On Mon, Apr 19, 2021 at 7:35 PM Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> On Mon, Apr 19, 2021 at 11:08 AM Kai-Heng Feng
> <kai.heng.feng@canonical.com> wrote:
> >
> > HP EliteBook 840 G8 reboots on s2idle resume, and HP EliteBook 845 G8
> > wakes up immediately on s2idle. Both are caused by the XMM7360 WWAN PCI
> > card.
> >
> > There's a WWAN specific method to really turn off the WWAN via EC:
> > Method (_PTS, 1, NotSerialized) // _PTS: Prepare To Sleep
> > {
> > ...
> > If (CondRefOf (\_SB.PCI0.GP12.PTS))
> > {
> > \_SB.PCI0.GP12.PTS (Arg0)
> > }
> > ...
> > }
> >
> > Scope (_SB.PCI0.GP12)
> > {
> > ...
> > Method (PTS, 1, Serialized)
> > {
> > If (^^LPCB.EC0.ECRG)
> > {
> > If ((PDID == 0xFFFF))
> > {
> > Return (Zero)
> > }
> >
> > POFF ()
> > SGIO (WWBR, One)
> > Sleep (0x1E)
> > Acquire (^^LPCB.EC0.ECMX, 0xFFFF)
> > ^^LPCB.EC0.WWP = One
> > Release (^^LPCB.EC0.ECMX)
> > Sleep (0x01F4)
> > }
> >
> > Return (Zero)
> > }
> > ...
> > }
> >
> > So let's also invok _PTS for s2idle.
> >
> > Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> > ---
> > drivers/acpi/sleep.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
> > index 09fd13757b65..7e84b4b09919 100644
> > --- a/drivers/acpi/sleep.c
> > +++ b/drivers/acpi/sleep.c
> > @@ -698,6 +698,7 @@ int acpi_s2idle_prepare(void)
> > }
> >
> > acpi_enable_wakeup_devices(ACPI_STATE_S0);
> > + acpi_enter_sleep_state_prep(ACPI_STATE_S0);
>
> The system is in S0 already at this point, so not really.
Ok, indeed ACPI spec only states _PTS can be used for S1 to S5.
> Please use a quirk to address this.
Let me discuss with HP folks. Right now it looks like we need to apply
this to all HP systems...
Kai-Heng
>
> >
> > /* Change the configuration of GPEs to avoid spurious wakeup. */
> > acpi_enable_all_wakeup_gpes();
> > --
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-04-19 9:07 [PATCH] ACPI: PM: s2idle: Invoke _PTS for s2idle Kai-Heng Feng
2021-04-19 11:34 ` Rafael J. Wysocki
2021-04-19 12:17 ` Kai-Heng Feng
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