From 068b47d0984b8756ae71702a1a87aa226cb72fe8 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 31 Jul 2019 11:05:25 +0200 Subject: [PATCH] ACPI: PM: s2idle: Add acpi.sleep_no_lps0 module parameter Add a module parameter to prevent the ACPI LPS0 _DSM functions from being invoked (if need be) and rework the suspend-to-idle blacklist entries in acpisleep_dmi_table[] to make them simply prevent suspend-to-idle from being used by default on the systems in question (which really is the original purpose of those entries). Signed-off-by: Rafael J. Wysocki Tested-by: Kai-Heng Feng --- drivers/acpi/sleep.c | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-) diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 3d706938980a..4a94600fea39 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -89,6 +89,10 @@ bool acpi_sleep_state_supported(u8 sleep_state) } #ifdef CONFIG_ACPI_SLEEP +static bool sleep_no_lps0 __read_mostly; +module_param(sleep_no_lps0, bool, 0644); +MODULE_PARM_DESC(sleep_no_lps0, "Do not use the special LPS0 device interface"); + static u32 acpi_target_sleep_state = ACPI_STATE_S0; u32 acpi_target_system_state(void) @@ -158,11 +162,11 @@ static int __init init_nvs_nosave(const struct dmi_system_id *d) return 0; } -static bool acpi_sleep_no_lps0; +static bool acpi_sleep_default_s3; -static int __init init_no_lps0(const struct dmi_system_id *d) +static int __init init_default_s3(const struct dmi_system_id *d) { - acpi_sleep_no_lps0 = true; + acpi_sleep_default_s3 = true; return 0; } @@ -363,7 +367,7 @@ static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { * S0 Idle firmware interface. */ { - .callback = init_no_lps0, + .callback = init_default_s3, .ident = "Dell XPS13 9360", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), @@ -376,7 +380,7 @@ static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { * https://bugzilla.kernel.org/show_bug.cgi?id=199057). */ { - .callback = init_no_lps0, + .callback = init_default_s3, .ident = "ThinkPad X1 Tablet(2016)", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), @@ -524,8 +528,9 @@ static void acpi_pm_end(void) acpi_sleep_tts_switch(acpi_target_sleep_state); } #else /* !CONFIG_ACPI_SLEEP */ +#define sleep_no_lps0 (1) #define acpi_target_sleep_state ACPI_STATE_S0 -#define acpi_sleep_no_lps0 (false) +#define acpi_sleep_default_s3 (1) static inline void acpi_sleep_dmi_check(void) {} #endif /* CONFIG_ACPI_SLEEP */ @@ -904,12 +909,6 @@ static int lps0_device_attach(struct acpi_device *adev, if (lps0_device_handle) return 0; - if (acpi_sleep_no_lps0) { - acpi_handle_info(adev->handle, - "Low Power S0 Idle interface disabled\n"); - return 0; - } - if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) return 0; @@ -937,7 +936,7 @@ static int lps0_device_attach(struct acpi_device *adev, * Use suspend-to-idle by default if the default suspend mode was not * set from the command line. */ - if (mem_sleep_default > PM_SUSPEND_MEM) + if (mem_sleep_default > PM_SUSPEND_MEM && !acpi_sleep_default_s3) mem_sleep_current = PM_SUSPEND_TO_IDLE; return 0; @@ -957,7 +956,7 @@ static int acpi_s2idle_begin(void) static int acpi_s2idle_prepare(void) { - if (lps0_device_handle) { + if (lps0_device_handle && !sleep_no_lps0) { acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); } @@ -977,7 +976,7 @@ static int acpi_s2idle_prepare(void) static void acpi_s2idle_wake(void) { - if (lps0_device_handle && pm_debug_messages_on) + if (lps0_device_handle && !sleep_no_lps0 && pm_debug_messages_on) lpi_check_constraints(); /* @@ -1025,7 +1024,7 @@ static void acpi_s2idle_restore(void) if (acpi_sci_irq_valid()) disable_irq_wake(acpi_sci_irq); - if (lps0_device_handle) { + if (lps0_device_handle && !sleep_no_lps0) { acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); }