[PATCH] platform/x86: samsung-galaxybook: Ignore ACPI notification 0x71

[Leonard Lausen]

The embedded controller on the Samsung Galaxy Book 930XDB emits ACPI
notification 0x71 repeatedly while resuming from s2idle. The driver
does not recognize it and logs a warning for every occurrence.

Inspection of Samsung System Support Service 1.5.6800.0, which targets
SAM0428 devices, found that notification 0x71 is left unmapped.

Accept the notification without an in-driver action. Its meaning is
unknown, so keep a neutral name for it. The common notification path
still forwards it to user space through ACPI netlink.

Signed-off-by: Leonard Lausen <leonard@xxxxxxxxx>
---
Tested on a Samsung Galaxy Book 930XDB with Linux 7.3.

 drivers/platform/x86/samsung-galaxybook.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/platform/x86/samsung-galaxybook.c b/drivers/platform/x86/samsung-galaxybook.c
index 99f72b204a51..3431e13bd7ed 100644
--- a/drivers/platform/x86/samsung-galaxybook.c
+++ b/drivers/platform/x86/samsung-galaxybook.c
@@ -197,6 +197,8 @@ static const guid_t performance_mode_guid =
 #define GB_ACPI_NOTIFY_DEVICE_ON_TABLE          0x6c
 #define GB_ACPI_NOTIFY_DEVICE_OFF_TABLE         0x6d
 #define GB_ACPI_NOTIFY_HOTKEY_PERFORMANCE_MODE  0x70
+/* No known in-driver action; still forwarded through ACPI netlink. */
+#define GB_ACPI_NOTIFY_UNKNOWN_71                 0x71
 #define GB_ACPI_NOTIFY_HOTKEY_KBD_BACKLIGHT     0x7d
 #define GB_ACPI_NOTIFY_HOTKEY_MICMUTE           0x6e
 #define GB_ACPI_NOTIFY_HOTKEY_CAMERA            0x6f
@@ -1258,6 +1260,7 @@ static void galaxybook_acpi_notify(acpi_handle handle, u32 event, void *data)
 	case GB_ACPI_NOTIFY_BATTERY_STATE_CHANGED:
 	case GB_ACPI_NOTIFY_DEVICE_ON_TABLE:
 	case GB_ACPI_NOTIFY_DEVICE_OFF_TABLE:
+	case GB_ACPI_NOTIFY_UNKNOWN_71:
 		break;
 	case GB_ACPI_NOTIFY_HOTKEY_PERFORMANCE_MODE:
 		if (galaxybook->has_performance_mode)

base-commit: c03c1a14507dfaf8b856c2608f9ac216021fc222
-- 
2.55.0