tree ec085aef3a57095027ad8accb6d71d9ccab59400
parent a6e60f043bc626eac58074a6b64ef04f00071f96
author Felix Held <felix-coreboot@felixheld.de> 1666977953 +0200
committer Martin L Roth <gaumless@gmail.com> 1667083773 +0000

soc/amd/*/acpi/mmio.asl,sb_fch.asl: hide AAHB device

Don't set bit 2 in _STA in order for Windows not to show a warning about
an unknown device in the device manager for this device. Since the _STA
object just returns a constant, a name definition can be used instead of
a method definition.

TEST=The unknown device with device instance path ACPI\AAHB0000\0
disappeared from the device manager in Windows 10 build 19045 on a
Mandolin board with a Picasso APU.

Just shutting down and then booting it again won't clear some internal
state in Windows, so a reboot is needed instead for the change to become
visible.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I8cb1712756c3623cc3ea16210af69cde0fa18f62
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68961
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>