@@ -133,6 +133,7 @@ struct platform_suspend_ops {
struct platform_s2idle_ops {
int (*display_off)(void);
+ int (*sleep_entry)(void);
int (*begin)(void);
int (*prepare)(void);
int (*prepare_late)(void);
@@ -141,6 +142,7 @@ struct platform_s2idle_ops {
void (*restore_early)(void);
void (*restore)(void);
void (*end)(void);
+ int (*sleep_exit)(void);
int (*display_on)(void);
};
@@ -259,6 +259,16 @@ static int platform_standby_display_off(void)
return s2idle_ops && s2idle_ops->display_off ? s2idle_ops->display_off() : 0;
}
+static int platform_standby_sleep_entry(void)
+{
+ return s2idle_ops && s2idle_ops->sleep_entry ? s2idle_ops->sleep_entry() : 0;
+}
+
+static int platform_standby_sleep_exit(void)
+{
+ return s2idle_ops && s2idle_ops->sleep_exit ? s2idle_ops->sleep_exit() : 0;
+}
+
static int platform_standby_display_on(void)
{
return s2idle_ops && s2idle_ops->display_on ? s2idle_ops->display_on() : 0;
The Sleep Entry and Sleep Exit firmware notifications allow the platform to enter Modern Standby. In this state, if supported, the platform turns off auxiliary USB devices (e.g., the controllers of the Legion Go), makes the power light of the device flash, and lowers the power envelope to a minimum that still allows for software activity without affecting battery life. Allow for entering this state prior to initiating the suspend sequence. This fixes issues where the EC or the USB of the device need time to power down before entering the suspend sequence, and allows for entering this power state without suspending the device. Suggested-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev> --- include/linux/suspend.h | 2 ++ kernel/power/suspend.c | 10 ++++++++++ 2 files changed, 12 insertions(+)