On Wed, Feb 7, 2024 at 2:01 AM Wentong Wu <wentong.wu@xxxxxxxxx> wrote:
>
> 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@xxxxxxxxx>
> ---
> drivers/acpi/scan.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index e6ed1ba91e5c..f32a2c738c8b 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -798,6 +798,7 @@ 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
> };
>
> --
Applied as 6.9 material, thanks!
