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ACPI: s2idle: Add a new ->check() callback for platform_s2idle_ops

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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>
This commit is contained in:
Mario Limonciello
2022-08-29 11:29:49 -05:00
committed by Hans de Goede
parent 76fba1221e
commit 811d59fdf5
5 changed files with 20 additions and 0 deletions
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include/linux/acpi.h
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@@ -1075,6 +1075,7 @@ acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state,
struct acpi_s2idle_dev_ops {
struct list_head list_node;
void (*prepare)(void);
void (*check)(void);
void (*restore)(void);
};
int acpi_register_lps0_dev(struct acpi_s2idle_dev_ops *arg);