mb/google/brya/var/gimble: Add new GFX devices with custom _PLD

Add new GFX devices for DDI and TCP with custom _PLD to describe the
corresponding ports.

BUG=b:277629750
TEST=emerge-brya coreboot

Change-Id: Ief27cd6e32780683c53a88d73194c6d82c6c212b
Signed-off-by: Won Chung <wonchung@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76899
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
diff --git a/src/mainboard/google/brya/variants/gimble/overridetree.cb b/src/mainboard/google/brya/variants/gimble/overridetree.cb
index 9eafedb..2b4a5ab 100644
--- a/src/mainboard/google/brya/variants/gimble/overridetree.cb
+++ b/src/mainboard/google/brya/variants/gimble/overridetree.cb
@@ -74,6 +74,28 @@
 		},
 	}"
 	device domain 0 on
+		device ref igpu on
+			chip drivers/gfx/generic
+				register "device_count" = "6"
+				# DDIA for eDP
+				register "device[0].name" = ""LCD""
+				# DDIB for HDMI
+				register "device[1].name" = ""DD01""
+				# TCP0 (DP-1) for port C0
+				register "device[2].name" = ""DD02""
+				register "device[2].use_pld" = "true"
+				register "device[2].pld" = "ACPI_PLD_TYPE_C(RIGHT, LEFT, ACPI_PLD_GROUP(1, 1))"
+				# TCP1 (DP-2) is unused for any ports but still enumerated in the kernel, so GFX device is added for TCP1
+				register "device[3].name" = ""DD03""
+				# TCP2 (DP-3) for port C1
+				register "device[4].name" = ""DD04""
+				register "device[4].use_pld" = "true"
+				register "device[4].pld" = "ACPI_PLD_TYPE_C(LEFT, LEFT, ACPI_PLD_GROUP(2, 1))"
+				# TCP3 (DP-4) is unused for any ports but still enumerated in the kernel, so GFX device is added for TCP3
+				register "device[5].name" = ""DD05""
+				device generic 0 on end
+			end
+		end # Integrated Graphics Device
 		device ref dtt on
 			chip drivers/intel/dptf
 				## sensor information
diff --git a/src/mainboard/google/brya/variants/gimble4es/overridetree.cb b/src/mainboard/google/brya/variants/gimble4es/overridetree.cb
index c9a7da1..90afbb0 100644
--- a/src/mainboard/google/brya/variants/gimble4es/overridetree.cb
+++ b/src/mainboard/google/brya/variants/gimble4es/overridetree.cb
@@ -39,6 +39,28 @@
 	register "usb2_ports[8]" = "USB2_PORT_EMPTY" # Type-A DB Port
 	register "usb3_ports[1]" = "USB3_PORT_DEFAULT(OC_SKIP)" # USB3/2 Type A MLB port
 	device domain 0 on
+		device ref igpu on
+			chip drivers/gfx/generic
+				register "device_count" = "6"
+				# DDIA for eDP
+				register "device[0].name" = ""LCD""
+				# DDIB for HDMI
+				register "device[1].name" = ""DD01""
+				# TCP0 (DP-1) for port C0
+				register "device[2].name" = ""DD02""
+				register "device[2].use_pld" = "true"
+				register "device[2].pld" = "ACPI_PLD_TYPE_C(RIGHT, LEFT, ACPI_PLD_GROUP(1, 1))"
+				# TCP1 (DP-2) is unused for any ports but still enumerated in the kernel, so GFX device is added for TCP1
+				register "device[3].name" = ""DD03""
+				# TCP2 (DP-3) for port C1
+				register "device[4].name" = ""DD04""
+				register "device[4].use_pld" = "true"
+				register "device[4].pld" = "ACPI_PLD_TYPE_C(LEFT, LEFT, ACPI_PLD_GROUP(2, 1))"
+				# TCP3 (DP-4) is unused for any ports but still enumerated in the kernel, so GFX device is added for TCP3
+				register "device[5].name" = ""DD05""
+				device generic 0 on end
+			end
+		end # Integrated Graphics Device
 		device ref dtt on
 			chip drivers/intel/dptf
 				## sensor information