driver/intel/mipi_camera: Add support for _DSC field

The _DSC (Device State for Configuration) object evaluates to an integer
may be used to tell Linux the highest allowed D state for a device
during probe. The support for _DSC requires support from the kernel
bus type if the bus driver normally sets the device in D0 state for
probe.

The D states and thus also the allowed values for _DSC are listed below.
Number	State	Description
0	D0	Device fully powered on
1	D1
2	D2
3	D3hot
4	D3cold	Off

More details can be found here https://lkml.org/lkml/2021/10/25/397

BUG=none
BRANCH=none
TEST=Add corresponding field in brya, boot and dump SSDT to check if
_DSC field is as per expectation.

            Name (_ADR, Zero)  // _ADR: Address
            Name (_HID, "OVTI8856")  // _HID: Hardware ID
            Name (_UID, Zero)  // _UID: Unique ID
            Name (_DDN, "Ov 8856 Camera")  // _DDN: DOS Device Name
            Method (_STA, 0, NotSerialized)  // _STA: Status
            {
                Return (0x0F)
            }

            Method (_DSC, 0, NotSerialized)
            {
                Return (0x04)
            }

Signed-off-by: Varshit B Pandya <varshit.b.pandya@intel.com>
Change-Id: I5471f144918413a2982f86beaf3dbf7e4e66cc9b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58767
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

0 files changed, 0 insertions, 0 deletions