[PATCH v1 0/6] ACPI: scan: MIPI DiSco for Imaging support

[Rafael J. Wysocki]

Hi Folks,

This basically is a re-write of a recent patch series from Sakari:

https://lore.kernel.org/linux-acpi/20230329100951.1522322-1-sakari.ailus@xxxxxxxxxxxxxxx

The general idea is the same - CSI-2 resource descriptors, introduced in
ACPI 6.4 and defined by

https://uefi.org/specs/ACPI/6.5/06_Device_Configuration.html#camera-serial-interface-csi-2-connection-resource-descriptor

are found and used for creating a set of software nodes that represent the CSI-2
connection graph.

These software nodes need to be available before any scan handlers or ACPI drivers
are bound to any struct acpi_device objects, so all of that is done at the early
stage of ACPI device enumeration, but unnecessary ACPI namespace walks are avoided.

The CSI-2 software nodes are populated with data extracted from the CSI-2 resource
descriptors themselves and from device properties defined by the MIPI DiSco for
Imaging specification (see https://www.mipi.org/specifications/mipi-disco-imaging).

Patches [4,6/6] come from the original series directly, but the other patches have
been changes substantially, so I've decided to re-start patch series versioning from
scratch.

This series is based on the patch at

https://patchwork.kernel.org/project/linux-acpi/patch/12223415.O9o76ZdvQC@kreacher/

applied on top of 6.4-rc3.

Later on, I'll put all of this material into a special git branch for easier
access.

Thanks!