Hi,
On 4/3/20 3:25 PM, Rafael J. Wysocki wrote:
On Fri, Apr 3, 2020 at 12:52 PM Hans de Goede hdegoede@redhat.com wrote:
The Power Management Events (PMEs) the INT0002 driver listens for get signalled by the Power Management Controller (PMC) using the same IRQ as used for the ACPI SCI.
Since commit fdde0ff8590b ("ACPI: PM: s2idle: Prevent spurious SCIs from waking up the system") the SCI triggering, without there being a wakeup cause recognized by the ACPI sleep code, will no longer wakeup the system.
This breaks PMEs / wakeups signalled to the INT0002 driver, the system never leaves the s2idle_loop() now.
Use acpi_register_wakeup_handler() to register a function which checks the GPE0a_STS register for a PME and trigger a wakeup when a PME has been signalled.
With this new mechanism the pm_wakeup_hard_event() call is no longer necessary, so remove it and also remove the matching device_init_wakeup() calls.
Fixes: fdde0ff8590b ("ACPI: PM: s2idle: Prevent spurious SCIs from waking up the system") Cc: 5.4+ stable@vger.kernel.org # 5.4+ Signed-off-by: Hans de Goede hdegoede@redhat.com
Changes in v2:
- Adjust for the wakeup-handler registration function being renamed to acpi_register_wakeup_handler()
drivers/platform/x86/intel_int0002_vgpio.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/platform/x86/intel_int0002_vgpio.c b/drivers/platform/x86/intel_int0002_vgpio.c index f14e2c5f9da5..9da19168b4f6 100644 --- a/drivers/platform/x86/intel_int0002_vgpio.c +++ b/drivers/platform/x86/intel_int0002_vgpio.c @@ -122,11 +122,17 @@ static irqreturn_t int0002_irq(int irq, void *data) generic_handle_irq(irq_find_mapping(chip->irq.domain, GPE0A_PME_B0_VIRT_GPIO_PIN));
pm_wakeup_hard_event(chip->parent);If the event occurs before the "noirq" phase of suspending devices, it can be missed with this change AFAICS.
return IRQ_HANDLED;}
+static bool int0002_check_wake(void *data) +{
u32 gpe_sts_reg;gpe_sts_reg = inl(GPE0A_STS_PORT);return (gpe_sts_reg & GPE0A_PME_B0_STS_BIT);+}
- static struct irq_chip int0002_byt_irqchip = { .name = DRV_NAME, .irq_ack = int0002_irq_ack,
@@ -220,13 +226,13 @@ static int int0002_probe(struct platform_device *pdev) return ret; }
device_init_wakeup(dev, true);
acpi_register_wakeup_handler(irq, int0002_check_wake, NULL);So I would just add the wakeup handler registration here.
Ok, will fix for the upcoming v3 of the series.
Regards,
Hans
return 0;}
static int int0002_remove(struct platform_device *pdev) {
device_init_wakeup(&pdev->dev, false);
acpi_unregister_wakeup_handler(int0002_check_wake, NULL); return 0;--