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| author | Mario Limonciello <mario.limonciello@amd.com> | 2022-08-29 18:29:49 +0200 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2022-09-09 17:37:40 +0200 |
| commit | 811d59fdf56a17c66742578fe8be8a6a841af448 (patch) | |
| tree | ecb1c30c5e5082ba8e3d7c664323717db40d822a /drivers/acpi/x86/s2idle.c | |
| parent | Merge tag 'backlight-detect-refactor-1' into review-hans (diff) | |
| download | linux-811d59fdf56a17c66742578fe8be8a6a841af448.tar.xz linux-811d59fdf56a17c66742578fe8be8a6a841af448.zip | |
ACPI: s2idle: Add a new ->check() callback for platform_s2idle_ops
On some platforms it is found that Linux more aggressively enters s2idle
than Windows enters Modern Standby and this uncovers some synchronization
issues for the platform. To aid in debugging this class of problems in
the future, add support for an extra optional callback intended for
drivers to emit extra debugging.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20220829162953.5947-2-mario.limonciello@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/acpi/x86/s2idle.c')
| -rw-r--r-- | drivers/acpi/x86/s2idle.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c index f9ac12b778e6..474aa46f82f6 100644 --- a/drivers/acpi/x86/s2idle.c +++ b/drivers/acpi/x86/s2idle.c @@ -486,6 +486,19 @@ int acpi_s2idle_prepare_late(void) return 0; } +void acpi_s2idle_check(void) +{ + struct acpi_s2idle_dev_ops *handler; + + if (!lps0_device_handle || sleep_no_lps0) + return; + + list_for_each_entry(handler, &lps0_s2idle_devops_head, list_node) { + if (handler->check) + handler->check(); + } +} + void acpi_s2idle_restore_early(void) { struct acpi_s2idle_dev_ops *handler; @@ -527,6 +540,7 @@ static const struct platform_s2idle_ops acpi_s2idle_ops_lps0 = { .begin = acpi_s2idle_begin, .prepare = acpi_s2idle_prepare, .prepare_late = acpi_s2idle_prepare_late, + .check = acpi_s2idle_check, .wake = acpi_s2idle_wake, .restore_early = acpi_s2idle_restore_early, .restore = acpi_s2idle_restore, |