On Tue, Oct 25, 2022 at 2:12 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
>
> Some x86/ACPI laptops with MIPI cameras have a LATT2021 ACPI device
> in the _DEP dependency list of the ACPI devices for the camera-sensors
> (which have flags.honor_deps set).
>
> The _DDN for the LATT2021 device is "Lattice FW Update Client Driver",
> suggesting that this is used for firmware updates of something. There
> is no Linux driver for this and if Linux gets support for updates it
> will likely be in userspace through fwupd.
>
> For now add the LATT2021 HID to acpi_ignore_dep_ids[] so that
> acpi_dev_ready_for_enumeration() will return true once the other _DEP
> dependencies are met.
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> Changes in v2:
> - Improve the commit message a bit (some sentences were mangled a bit
> during editing)
> ---
> drivers/acpi/scan.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 024cc373a197..b47e93a24a9a 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -789,6 +789,7 @@ static bool acpi_info_matches_ids(struct acpi_device_info *info,
> static const char * const acpi_ignore_dep_ids[] = {
> "PNP0D80", /* Windows-compatible System Power Management Controller */
> "INT33BD", /* Intel Baytrail Mailbox Device */
> + "LATT2021", /* Lattice FW Update Client Driver */
> NULL
> };
>
> --
Applied as 6.1-rc material, thanks!
