[XS] Change in coreboot[main]: soc/intel/{adl,tgl}: Set IOM ACPI device to hidden/on

[Matt DeVillier (Code Review)]

Matt DeVillier has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86257?usp=email )

Change subject: soc/intel/{adl,tgl}: Set IOM ACPI device to hidden/on
......................................................................

soc/intel/{adl,tgl}: Set IOM ACPI device to hidden/on

This prevents Windows from displaying the IOM device in Device Manager
as an unknown device with no driver available, and brings Alderlake
and Tigerlake in line with Meteorlake and Pantherlake.

TEST=build/boot Win11 on starlabs/starlite_adl, verify IOM device
not shown as unknown device in Device Manager.

Change-Id: Ib31018173126737b36a6e0d822eba2ebc9c42306
Signed-off-by: Matt DeVillier 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86257
Reviewed-by: Jérémy Compostella 
Reviewed-by: Sean Rhodes 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/alderlake/acpi/tcss.asl
M src/soc/intel/tigerlake/acpi/tcss.asl
2 files changed, 4 insertions(+), 2 deletions(-)

Approvals:
  Jérémy Compostella: Looks good to me, approved
  Sean Rhodes: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/soc/intel/alderlake/acpi/tcss.asl b/src/soc/intel/alderlake/acpi/tcss.asl
index 6f8edda..2d09c64 100644
--- a/src/soc/intel/alderlake/acpi/tcss.asl
+++ b/src/soc/intel/alderlake/acpi/tcss.asl
@@ -331,7 +331,8 @@
    	Name (_CRS, ResourceTemplate () {
    		Memory32Fixed (ReadWrite, IOM_BASE_ADDRESS, IOM_BASE_SIZE)
    	})
-		Name (_STA, 0xF)
+		/* ACPI_STATUS_DEVICE_HIDDEN_ON */
+		Name (_STA, 0xB)
    }

/*
diff --git a/src/soc/intel/tigerlake/acpi/tcss.asl b/src/soc/intel/tigerlake/acpi/tcss.asl
index 588ed5e..f02a4a3 100644
--- a/src/soc/intel/tigerlake/acpi/tcss.asl
+++ b/src/soc/intel/tigerlake/acpi/tcss.asl
@@ -331,7 +331,8 @@
    	Name (_CRS, ResourceTemplate () {
    		Memory32Fixed (ReadWrite, IOM_BASE_ADDRESS, IOM_BASE_SIZE)
    	})
-		Name (_STA, 0xF)
+		/* ACPI_STATUS_DEVICE_HIDDEN_ON */
+		Name (_STA, 0xB)
    }

/*