[S] Change in coreboot[master]: mb/google/brya/acpi: Add support for forcing notifications in DNOT func

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/73900 )

Change subject: mb/google/brya/acpi: Add support for forcing notifications in DNOT func
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mb/google/brya/acpi: Add support for forcing notifications in DNOT func

Currently the DNOT function first checks to see if the current DNOT
value has already been reported. Add support to allow forcing regardless
if it had been sent already.

TEST=confirmed that when enabled, all events notify. When disabled, only
events on value change are notified.
BUG=b:271938907
Signed-off-by: Tarun Tuli 
Change-Id: I7a93cca6a8f922574dd46b46572b230755db9aa7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73900
Tested-by: build bot (Jenkins) 
Reviewed-by: Eric Lai 
---
M src/mainboard/google/brya/acpi/gpu_ec.asl
M src/mainboard/google/brya/acpi/gpu_top.asl
2 files changed, 27 insertions(+), 4 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Eric Lai: Looks good to me, approved

diff --git a/src/mainboard/google/brya/acpi/gpu_ec.asl b/src/mainboard/google/brya/acpi/gpu_ec.asl
index 998d9c0..59875ad 100644
--- a/src/mainboard/google/brya/acpi/gpu_ec.asl
+++ b/src/mainboard/google/brya/acpi/gpu_ec.asl
@@ -8,6 +8,6 @@
    Method (_Q0C, 0, Serialized)
    {
    	Local0 = ToInteger(GPUD) & EC_D_NOTIFY_MASK
-		_SB.PCI0.PEG0.PEGP.DNOT (Local0)
+		_SB.PCI0.PEG0.PEGP.DNOT (Local0, 0)
    }
 }
diff --git a/src/mainboard/google/brya/acpi/gpu_top.asl b/src/mainboard/google/brya/acpi/gpu_top.asl
index e23e3cf..492502c 100644
--- a/src/mainboard/google/brya/acpi/gpu_top.asl
+++ b/src/mainboard/google/brya/acpi/gpu_top.asl
@@ -40,12 +40,15 @@
    		}
    	}

-		/* Current D Notify Value, defaults to D1 */
+		/* Current D Notify Value, defaults to D1
+		* Arg0 == Shared value
+		* Arg1 == force notification if no change (0 or 1)
+		*/
    	Name (CDNV, D1_EC)
-		Method (DNOT, 1, Serialized)
+		Method (DNOT, 2, Serialized)
    	{
    		Printf ("EC: GPU D-Notify, %o", Arg0)
-			If (Arg0 != CDNV)
+			If ((Arg0 != CDNV) || (Arg1 == 1))
    		{
    			CDNV = Arg0
    			Local0 = CNVD (Arg0)