From 10a08fd65ec1a68ccd86b19ec822ed5f2e50113f Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 30 Jul 2019 11:55:59 +0200 Subject: ACPI: PM: Set up EC GPE for system wakeup from drivers that need it The EC GPE needs to be set up for system wakeup only if there is a driver depending on it, either intel-hid or intel-vbtn, bound to a button device that is expected to wake up the system from sleep (such as the power button on some Dell systems, like the XPS13 9360). It doesn't need to be set up for waking up the system from sleep in any other cases and whether or not it is expected to wake up the system from sleep doesn't depend on whether or not the LPS0 device is present in the ACPI namespace. For this reason, rearrange the ACPI suspend-to-idle code to make the drivers depending on the EC GPE wakeup take care of setting it up and decouple that from the LPS0 device handling. While at it, make intel-hid and intel-vbtn prepare for system wakeup only if they are allowed to wake up the system from sleep by user space (via sysfs). [Note that acpi_ec_mark_gpe_for_wake() and acpi_ec_set_gpe_wake_mask() are there to prevent the EC GPE from being disabled by the acpi_enable_all_wakeup_gpes() call in acpi_s2idle_prepare(), so on systems with either intel-hid or intel-vbtn this change doesn't affect any interactions with the hardware or platform firmware.] Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko --- drivers/platform/x86/intel-hid.c | 20 ++++++++++++++++---- drivers/platform/x86/intel-vbtn.c | 20 ++++++++++++++++---- 2 files changed, 32 insertions(+), 8 deletions(-) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c index bc0d55a59015..e51c72b92cbd 100644 --- a/drivers/platform/x86/intel-hid.c +++ b/drivers/platform/x86/intel-hid.c @@ -253,9 +253,12 @@ static void intel_button_array_enable(struct device *device, bool enable) static int intel_hid_pm_prepare(struct device *device) { - struct intel_hid_priv *priv = dev_get_drvdata(device); + if (device_may_wakeup(device)) { + struct intel_hid_priv *priv = dev_get_drvdata(device); - priv->wakeup_mode = true; + priv->wakeup_mode = true; + acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); + } return 0; } @@ -270,9 +273,12 @@ static int intel_hid_pl_suspend_handler(struct device *device) static int intel_hid_pl_resume_handler(struct device *device) { - struct intel_hid_priv *priv = dev_get_drvdata(device); + if (device_may_wakeup(device)) { + struct intel_hid_priv *priv = dev_get_drvdata(device); - priv->wakeup_mode = false; + acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); + priv->wakeup_mode = false; + } if (pm_resume_via_firmware()) { intel_hid_set_enable(device, true); intel_button_array_enable(device, true); @@ -491,6 +497,12 @@ static int intel_hid_probe(struct platform_device *device) } device_init_wakeup(&device->dev, true); + /* + * In order for system wakeup to work, the EC GPE has to be marked as + * a wakeup one, so do that here (this setting will persist, but it has + * no effect until the wakeup mask is set for the EC GPE). + */ + acpi_ec_mark_gpe_for_wake(); return 0; err_remove_notify: diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index a0d0cecff55f..ab84e1bbdedd 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -176,6 +176,12 @@ static int intel_vbtn_probe(struct platform_device *device) return -EBUSY; device_init_wakeup(&device->dev, true); + /* + * In order for system wakeup to work, the EC GPE has to be marked as + * a wakeup one, so do that here (this setting will persist, but it has + * no effect until the wakeup mask is set for the EC GPE). + */ + acpi_ec_mark_gpe_for_wake(); return 0; } @@ -195,17 +201,23 @@ static int intel_vbtn_remove(struct platform_device *device) static int intel_vbtn_pm_prepare(struct device *dev) { - struct intel_vbtn_priv *priv = dev_get_drvdata(dev); + if (device_may_wakeup(dev)) { + struct intel_vbtn_priv *priv = dev_get_drvdata(dev); - priv->wakeup_mode = true; + priv->wakeup_mode = true; + acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); + } return 0; } static int intel_vbtn_pm_resume(struct device *dev) { - struct intel_vbtn_priv *priv = dev_get_drvdata(dev); + if (device_may_wakeup(dev)) { + struct intel_vbtn_priv *priv = dev_get_drvdata(dev); - priv->wakeup_mode = false; + acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); + priv->wakeup_mode = false; + } return 0; } -- cgit v1.2.3 From 31eb845718398f9bc9f6fbe1aca675f4e6284392 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 8 Aug 2019 11:39:17 +0200 Subject: intel-hid: intel-vbtn: Avoid leaking wakeup_mode set Both intel-hid and intel-vbtn set a wakeup_mode flag causing them to behave in a special way during system suspend and while suspended in their "prepare" PM callbacks and clear it in their "resume" PM callbacks. That may cause the wakeup_mode flag to remain set after a system suspend failure (if some other driver's "suspend" callback returns an error before the "suspend" callback of either intel-hid or intel-vbtn is invoked). After commit 10a08fd65ec1 ("ACPI: PM: Set up EC GPE for system wakeup from drivers that need it") that also affects the "wakeup mask" bit of the EC GPE, which may not be cleared after a failing system suspend. Fix this issue by adding "complete" PM callbacks to intel-hid and intel-vbtn to clear the wakeup_mode flag and the "wakeup mask" bit of the EC GPE if they have not been cleared earlier. Fixes: 10a08fd65ec1 ("ACPI: PM: Set up EC GPE for system wakeup from drivers that need it") Signed-off-by: Rafael J. Wysocki Acked-by: Andy Shevchenko --- drivers/platform/x86/intel-hid.c | 17 ++++++++++++----- drivers/platform/x86/intel-vbtn.c | 12 +++++++++--- 2 files changed, 21 insertions(+), 8 deletions(-) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c index e51c72b92cbd..6feda887df9d 100644 --- a/drivers/platform/x86/intel-hid.c +++ b/drivers/platform/x86/intel-hid.c @@ -262,6 +262,16 @@ static int intel_hid_pm_prepare(struct device *device) return 0; } +static void intel_hid_pm_complete(struct device *device) +{ + struct intel_hid_priv *priv = dev_get_drvdata(device); + + if (priv->wakeup_mode) { + acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); + priv->wakeup_mode = false; + } +} + static int intel_hid_pl_suspend_handler(struct device *device) { if (pm_suspend_via_firmware()) { @@ -273,12 +283,8 @@ static int intel_hid_pl_suspend_handler(struct device *device) static int intel_hid_pl_resume_handler(struct device *device) { - if (device_may_wakeup(device)) { - struct intel_hid_priv *priv = dev_get_drvdata(device); + intel_hid_pm_complete(device); - acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); - priv->wakeup_mode = false; - } if (pm_resume_via_firmware()) { intel_hid_set_enable(device, true); intel_button_array_enable(device, true); @@ -288,6 +294,7 @@ static int intel_hid_pl_resume_handler(struct device *device) static const struct dev_pm_ops intel_hid_pl_pm_ops = { .prepare = intel_hid_pm_prepare, + .complete = intel_hid_pm_complete, .freeze = intel_hid_pl_suspend_handler, .thaw = intel_hid_pl_resume_handler, .restore = intel_hid_pl_resume_handler, diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index ab84e1bbdedd..b28e5519337e 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -210,19 +210,25 @@ static int intel_vbtn_pm_prepare(struct device *dev) return 0; } -static int intel_vbtn_pm_resume(struct device *dev) +static void intel_vbtn_pm_complete(struct device *dev) { - if (device_may_wakeup(dev)) { - struct intel_vbtn_priv *priv = dev_get_drvdata(dev); + struct intel_vbtn_priv *priv = dev_get_drvdata(dev); + if (priv->wakeup_mode) { acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); priv->wakeup_mode = false; } +} + +static int intel_vbtn_pm_resume(struct device *dev) +{ + intel_vbtn_pm_complete(dev); return 0; } static const struct dev_pm_ops intel_vbtn_pm_ops = { .prepare = intel_vbtn_pm_prepare, + .complete = intel_vbtn_pm_complete, .resume = intel_vbtn_pm_resume, .restore = intel_vbtn_pm_resume, .thaw = intel_vbtn_pm_resume, -- cgit v1.2.3 From d19bdb876bece27187d4ffbc272672e1239cd313 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 8 Aug 2019 11:39:23 +0200 Subject: intel-hid: Disable button array during suspend-to-idle Notice that intel_button_array_enable() never disables the power button which is the only one needed to wake up the system from suspend-to-idle, so it can be safely called during suspend-to-idle as well as during "regular" system suspend, and rearrange the code in the driver's "suspend" and "resume" callbacks accordingly. While at it, use pm_suspend_no_platform() to check if the current suspend-resume cycle is suspend-to-idle, as that is the only case when the device should be enabled while suspended. Signed-off-by: Rafael J. Wysocki Acked-by: Andy Shevchenko --- drivers/platform/x86/intel-hid.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c index 6feda887df9d..18ac237114ff 100644 --- a/drivers/platform/x86/intel-hid.c +++ b/drivers/platform/x86/intel-hid.c @@ -274,10 +274,11 @@ static void intel_hid_pm_complete(struct device *device) static int intel_hid_pl_suspend_handler(struct device *device) { - if (pm_suspend_via_firmware()) { + intel_button_array_enable(device, false); + + if (!pm_suspend_no_platform()) intel_hid_set_enable(device, false); - intel_button_array_enable(device, false); - } + return 0; } @@ -285,10 +286,10 @@ static int intel_hid_pl_resume_handler(struct device *device) { intel_hid_pm_complete(device); - if (pm_resume_via_firmware()) { + if (!pm_suspend_no_platform()) intel_hid_set_enable(device, true); - intel_button_array_enable(device, true); - } + + intel_button_array_enable(device, true); return 0; } -- cgit v1.2.3 From b90ff3554aa3e123bb7e6d08789f6fd92d86ddde Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 21 Aug 2019 11:40:19 +0200 Subject: ACPI: PM: s2idle: Always set up EC GPE for system wakeup Commit 10a08fd65ec1 ("ACPI: PM: Set up EC GPE for system wakeup from drivers that need it") assumed that the EC GPE would only need to be set up for system wakeup if either the intel-hid or the intel-vbtn driver was in use, but that turns out to be incorrect. In particular, on ASUS Zenbook UX430UNR/i7-8550U, if the EC GPE is not enabled while suspended, the system cannot be woken up by opening the lid or pressing a key, and that machine doesn't use any of the drivers mentioned above. For this reason, always set up the EC GPE for system wakeup from suspend-to-idle by setting and clearing its wake mask in the ACPI suspend-to-idle callbacks. Fixes: 10a08fd65ec1 ("ACPI: PM: Set up EC GPE for system wakeup from drivers that need it") Reported-by: Kristian Klausen Tested-by: Kristian Klausen Acked-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki --- drivers/platform/x86/intel-hid.c | 6 +----- drivers/platform/x86/intel-vbtn.c | 6 +----- 2 files changed, 2 insertions(+), 10 deletions(-) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c index 18ac237114ff..ef6d4bd77b1a 100644 --- a/drivers/platform/x86/intel-hid.c +++ b/drivers/platform/x86/intel-hid.c @@ -257,7 +257,6 @@ static int intel_hid_pm_prepare(struct device *device) struct intel_hid_priv *priv = dev_get_drvdata(device); priv->wakeup_mode = true; - acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); } return 0; } @@ -266,10 +265,7 @@ static void intel_hid_pm_complete(struct device *device) { struct intel_hid_priv *priv = dev_get_drvdata(device); - if (priv->wakeup_mode) { - acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); - priv->wakeup_mode = false; - } + priv->wakeup_mode = false; } static int intel_hid_pl_suspend_handler(struct device *device) diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index b28e5519337e..b74932307d69 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -205,7 +205,6 @@ static int intel_vbtn_pm_prepare(struct device *dev) struct intel_vbtn_priv *priv = dev_get_drvdata(dev); priv->wakeup_mode = true; - acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); } return 0; } @@ -214,10 +213,7 @@ static void intel_vbtn_pm_complete(struct device *dev) { struct intel_vbtn_priv *priv = dev_get_drvdata(dev); - if (priv->wakeup_mode) { - acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); - priv->wakeup_mode = false; - } + priv->wakeup_mode = false; } static int intel_vbtn_pm_resume(struct device *dev) -- cgit v1.2.3