Change in coreboot[master]: [TOTEST]mb/lenovo/x200/dock.asl: Issue DOCK ACPI events based on Dock ID

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/22919

Change subject: [TOTEST]mb/lenovo/x200/dock.asl: Issue DOCK ACPI events based on Dock ID
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[TOTEST]mb/lenovo/x200/dock.asl: Issue DOCK ACPI events based on Dock ID

Some Dock events only need to happen based on the Dock Id (which
functions as a presence detect GPIO).

Inspired by vendor bios DSDT.

This fixes ACPI undock events on every power unplug even when undock.

Change-Id: I1eef971d49508bcd94d5d1cf2b70395b7cd80b1c
Signed-off-by: Arthur Heymans 
---
M src/mainboard/lenovo/x200/acpi/dock.asl
1 file changed, 37 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/22919/1

diff --git a/src/mainboard/lenovo/x200/acpi/dock.asl b/src/mainboard/lenovo/x200/acpi/dock.asl
index 0c7c9ab..197f298 100644
--- a/src/mainboard/lenovo/x200/acpi/dock.asl
+++ b/src/mainboard/lenovo/x200/acpi/dock.asl
@@ -41,6 +41,24 @@
    	{
    		Return (_SB.PCI0.LPCB.EC.DKR1)
    	}
+
+		Name (G_ID, 0xFFFFFFFF)
+		/* Returns 0x7 (dock present) or 0x3 (dock absent) */
+		Method(GGID, 0, NotSerialized)
+		{
+			Store(G_ID, Local0)
+			if (LEqual(Local0, 0xFFFFFFFF))
+			{
+				Store(Or (Or (GP02, ShiftLeft(GP03, 1)),
+					 ShiftLeft(GP04, 2)), Local0)
+				If (LEqual(Local0, 0x00))
+				{
+					Store(0x03, Local0)
+				}
+				Store(Local0, G_ID)
+			}
+			return (Local0)
+		}
    }
 }

@@ -63,7 +81,11 @@

Method(_Q50, 0, NotSerialized)
    {
-		Notify(_SB.DOCK, 3)
+		Store(_SB.DOCK.GGID (), Local0)
+		if (LNotEqual(Local0, 0x07))
+		{
+			Notify(_SB.DOCK, 3)
+		}
    }

Method(_Q58, 0, NotSerialized)
@@ -73,6 +95,19 @@

Method(_Q5A, 0, NotSerialized)
    {
-		Notify(_SB.DOCK, 3)
+		Store(_SB.DOCK.GGID (), Local0)
+		if (LEqual(Local0, 0x07))
+		{
+			Notify(_SB.DOCK, 3)
+		}
+		if (LEqual(Local0, 0x03))
+		{
+			Sleep(0x64)
+			Store(DKR1, Local1)
+			if (LEqual(Local1, 1))
+			{
+				Notify(_SB.DOCK, 0)
+			}
+		}
    }
 }