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 INTC1059 ACPI device, so adding INTC1059 to acpi_honor_dep_ids
allows solving the probe-ordering problem by delaying the enumeration of
ACPI-devices which have a _DEP dependency on an INTC1059 device.
Signed-off-by: Wentong Wu <wentong.wu@xxxxxxxxx>
---
drivers/acpi/scan.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 2743444..5b48dcd 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -796,6 +796,7 @@ static const char * const acpi_ignore_dep_ids[] = {
/* List of HIDs for which we honor deps of matching ACPI devs, when checking _DEP lists. */
static const char * const acpi_honor_dep_ids[] = {
"INT3472", /* Camera sensor PMIC / clk and regulator info */
+ "INTC1059",
NULL
};
--
2.7.4
