Commit 9272e97a authored Dec 15, 2020 by Hans de Goede Committed by Rafael J. Wysocki Dec 17, 2020

ACPI: scan: Add Intel Baytrail Mailbox Device to acpi_ignore_dep_ids

Linux does not have a driver for / does not use the "Intel Baytrail
Mailbox Device" (ACIP HID INT33BD). Add it to the acpi_ignore_dep_ids
list, so that we do not defer probing ACPI devices which depend on
another ACPI device with this HID.

Specifically this makes us not defer the probing of the GPO1 ACPI
device / GPIO controller on the Acer Switch 10E SW3-016. On this
tablet model the _HID method of the ACPI node for the UART attached
Bluetooth, reads GPIOs to detect the installed wifi chip and updates
the reported _HID for the Bluetooth's ACPI node accordingly.

For the Bluetooth's ACPI node to report the correct _HID the GPO1 device
must be probed and attached during the first scan pass. Adding the
"INT33BD" HID to the acpi_ignore_dep_ids list makes this all work.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 0de7fb7c

drivers/acpi/scan.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -752,6 +752,7 @@ static bool acpi_info_matches_ids(struct acpi_device_info *info,
		/* List of HIDs for which we ignore matching ACPI devices, when checking _DEP lists. */
		static const char * const acpi_ignore_dep_ids[] = {
		"PNP0D80", /* Windows-compatible System Power Management Controller */
		"INT33BD", /* Intel Baytrail Mailbox Device */
		NULL
		};

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