diff mbox series

[1/5,SRU,Noble/Unstable] ACPI: scan: Defer enumeration of devices with a _DEP pointing to IVSC device

Message ID 20240419052424.278801-2-vicamo.yang@canonical.com
State New
Headers show
Series obsolete out-of-tree ivsc dkms in favor of in-tree one | expand

Commit Message

You-Sheng Yang April 19, 2024, 5:24 a.m. UTC 
From: Wentong Wu <wentong.wu@intel.com>

BugLink: https://bugs.launchpad.net/bugs/2061747

Inside IVSC, switching ownership requires an interface with two
different hardware modules, ACE and CSI. The software interface
to these modules is based on Intel MEI framework. Usually mei
client devices are dynamically created, so the info of consumers
depending on mei client devices is not present in the firmware
tables.

This causes problems with the probe ordering with respect to
drivers for consumers of these MEI client devices. But on these
camera sensor devices, the ACPI nodes describing the sensors all
have a _DEP dependency on the matching MEI bus ACPI device, so
adding IVSC MEI bus ACPI device to acpi_honor_dep_ids allows
solving the probe-ordering problem by deferring the enumeration of
ACPI-devices which have a _DEP dependency on an IVSC mei bus ACPI
device.

Add INTC10CF, the HID of IVSC MEI bus ACPI device on MTL platform,
to acpi_honor_dep_ids.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit 1e518e8333ca2134a53b96bc835432083f274350)
Signed-off-by: You-Sheng Yang <vicamo.yang@canonical.com>
---
 drivers/acpi/scan.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 617f3e0e963d..dd817e9ed2e5 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -794,6 +794,7 @@  static const char * const acpi_honor_dep_ids[] = {
 	"INTC1059", /* IVSC (TGL) driver must be loaded to allow i2c access to camera sensors */
 	"INTC1095", /* IVSC (ADL) driver must be loaded to allow i2c access to camera sensors */
 	"INTC100A", /* IVSC (RPL) driver must be loaded to allow i2c access to camera sensors */
+	"INTC10CF", /* IVSC (MTL) driver must be loaded to allow i2c access to camera sensors */
 	NULL
 };