mb/google/rex: enable d3hot for storage devices

_DSD "StorageD3Enable" property is needs to be set under the root
port in the DSDT or SSDT. The ACPI _DSD method is the preferred way
to opt D3hot support for storage devices.

This also bypasses the low LTR from SSD that blocking S0i2.2
LTR/latency SoC requirement.

Name (_DSD, Package () {
    ToUUID("5025030F-842F-4AB4-A561-99A5189762D0"),
        Package () {
            Package (2) {"StorageD3Enable", 1},
            // 1 - Enable; 0 - Disable
        }
    }
)

BUG=b:289028958
TEST=Check code compiles & boot rex, and verify the "StorageD3Enable"
SSDT entry.

Change-Id: I19decc2706954e73bc28fc2d9c3c4d18d2c384b7
Signed-off-by: Kangheui Won <khwon@chromium.org>
Signed-off-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76835
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions