Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 3f529ad..6fc8843 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -190,8 +190,9 @@
struct platform_s2idle_ops {
int (*begin)(void);
int (*prepare)(void);
+ int (*prepare_late)(void);
void (*wake)(void);
- void (*sync)(void);
+ void (*restore_early)(void);
void (*restore)(void);
void (*end)(void);
};
@@ -209,8 +210,9 @@
extern unsigned int pm_suspend_global_flags;
-#define PM_SUSPEND_FLAG_FW_SUSPEND (1 << 0)
-#define PM_SUSPEND_FLAG_FW_RESUME (1 << 1)
+#define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0)
+#define PM_SUSPEND_FLAG_FW_RESUME BIT(1)
+#define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2)
static inline void pm_suspend_clear_flags(void)
{
@@ -227,16 +229,68 @@
pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME;
}
+static inline void pm_set_suspend_no_platform(void)
+{
+ pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM;
+}
+
+/**
+ * pm_suspend_via_firmware - Check if platform firmware will suspend the system.
+ *
+ * To be called during system-wide power management transitions to sleep states
+ * or during the subsequent system-wide transitions back to the working state.
+ *
+ * Return 'true' if the platform firmware is going to be invoked at the end of
+ * the system-wide power management transition (to a sleep state) in progress in
+ * order to complete it, or if the platform firmware has been invoked in order
+ * to complete the last (or preceding) transition of the system to a sleep
+ * state.
+ *
+ * This matters if the caller needs or wants to carry out some special actions
+ * depending on whether or not control will be passed to the platform firmware
+ * subsequently (for example, the device may need to be reset before letting the
+ * platform firmware manipulate it, which is not necessary when the platform
+ * firmware is not going to be invoked) or when such special actions may have
+ * been carried out during the preceding transition of the system to a sleep
+ * state (as they may need to be taken into account).
+ */
static inline bool pm_suspend_via_firmware(void)
{
return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND);
}
+/**
+ * pm_resume_via_firmware - Check if platform firmware has woken up the system.
+ *
+ * To be called during system-wide power management transitions from sleep
+ * states.
+ *
+ * Return 'true' if the platform firmware has passed control to the kernel at
+ * the beginning of the system-wide power management transition in progress, so
+ * the event that woke up the system from sleep has been handled by the platform
+ * firmware.
+ */
static inline bool pm_resume_via_firmware(void)
{
return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME);
}
+/**
+ * pm_suspend_no_platform - Check if platform may change device power states.
+ *
+ * To be called during system-wide power management transitions to sleep states
+ * or during the subsequent system-wide transitions back to the working state.
+ *
+ * Return 'true' if the power states of devices remain under full control of the
+ * kernel throughout the system-wide suspend and resume cycle in progress (that
+ * is, if a device is put into a certain power state during suspend, it can be
+ * expected to remain in that state during resume).
+ */
+static inline bool pm_suspend_no_platform(void)
+{
+ return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM);
+}
+
/* Suspend-to-idle state machnine. */
enum s2idle_states {
S2IDLE_STATE_NONE, /* Not suspended/suspending. */
@@ -251,7 +305,7 @@
return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
}
-extern bool pm_suspend_via_s2idle(void);
+extern bool pm_suspend_default_s2idle(void);
extern void __init pm_states_init(void);
extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
extern void s2idle_wake(void);
@@ -283,7 +337,8 @@
static inline void pm_set_resume_via_firmware(void) {}
static inline bool pm_suspend_via_firmware(void) { return false; }
static inline bool pm_resume_via_firmware(void) { return false; }
-static inline bool pm_suspend_via_s2idle(void) { return false; }
+static inline bool pm_suspend_no_platform(void) { return false; }
+static inline bool pm_suspend_default_s2idle(void) { return false; }
static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
@@ -359,7 +414,7 @@
* platforms which require special recovery actions in that situation.
*/
struct platform_hibernation_ops {
- int (*begin)(void);
+ int (*begin)(pm_message_t stage);
void (*end)(void);
int (*pre_snapshot)(void);
void (*finish)(void);
@@ -395,6 +450,7 @@
extern bool hibernation_available(void);
asmlinkage int swsusp_save(void);
extern struct pbe *restore_pblist;
+int pfn_is_nosave(unsigned long pfn);
#else /* CONFIG_HIBERNATION */
static inline void register_nosave_region(unsigned long b, unsigned long e) {}
static inline void register_nosave_region_late(unsigned long b, unsigned long e) {}
@@ -425,6 +481,7 @@
/* kernel/power/main.c */
extern int register_pm_notifier(struct notifier_block *nb);
extern int unregister_pm_notifier(struct notifier_block *nb);
+extern void ksys_sync_helper(void);
#define pm_notifier(fn, pri) { \
static struct notifier_block fn##_nb = \
@@ -462,6 +519,8 @@
return 0;
}
+static inline void ksys_sync_helper(void) {}
+
#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
static inline bool pm_wakeup_pending(void) { return false; }