Create a new version of paste:

diff --git a/src/device/Kconfig b/src/device/Kconfig
index a5e00aa331..22a2f773fd 100644
--- a/src/device/Kconfig
+++ b/src/device/Kconfig
@@ -65,6 +65,23 @@ config MAINBOARD_HAS_EARLY_LIBGFXINIT
 	  stage) support of `libgfxinit`. Usually this requires a list
 	  of ports to be probed for displays.
 
+config MAINBOARD_VERSION_HAS_AMD_DGPU_WITHOUT_EEPROM
+	def_bool n
+	help
+	  Selected by mainboards that have a version with the onboard AMD
+	  discrete GPU without its own EEPROM storage for VGA Option ROM.
+
+config AMD_DGPU_WITHOUT_EEPROM
+	def_bool n
+	prompt "AMD discrete GPU without EEPROM"
+	depends on MAINBOARD_VERSION_HAS_AMD_DGPU_WITHOUT_EEPROM
+	help
+	  Some platforms like Lenovo G505S have the motherboard versions
+	  with the onboard AMD discrete GPU without its own dedicated EEPROM
+	  storage for VGA Option ROM. For such a discrete GPU to be usable
+	  with coreboot, the PCI init of GPUs has to be done differently.
+	  Enable this option if your motherboard has such a discrete GPU.
+
 choice
 	prompt "Graphics initialization"
 	default NO_GFX_INIT if VGA_ROM_RUN_DEFAULT && PAYLOAD_SEABIOS
diff --git a/src/device/pci_device.c b/src/device/pci_device.c
index a3ddcdcc9e..69dbb4b3a6 100644
--- a/src/device/pci_device.c
+++ b/src/device/pci_device.c
@@ -860,6 +860,10 @@ static int should_run_oprom(struct device *dev, struct rom_header *rom)
 	if (should_run >= 0)
 		return should_run;
 
+	if (CONFIG(AMD_DGPU_WITHOUT_EEPROM) &&
+		((dev->class >> 8) == PCI_CLASS_DISPLAY_OTHER))
+		return 0;
+
 	if (CONFIG(ALWAYS_RUN_OPROM)) {
 		should_run = 1;
 		return should_run;
@@ -881,8 +885,13 @@ static int should_load_oprom(struct device *dev)
 	 * ROMs when coming out of an S3 resume.
 	 */
 	if (!CONFIG(S3_VGA_ROM_RUN) && acpi_is_wakeup_s3() &&
-		((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA))
+		(((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA) ||
+			(CONFIG(AMD_DGPU_WITHOUT_EEPROM) &&
+			((dev->class >> 8) == PCI_CLASS_DISPLAY_OTHER))))
 		return 0;
+	if (CONFIG(AMD_DGPU_WITHOUT_EEPROM) &&
+		((dev->class >> 8) == PCI_CLASS_DISPLAY_OTHER))
+		return 1;
 	if (CONFIG(ALWAYS_LOAD_OPROM))
 		return 1;
 	if (should_run_oprom(dev, NULL))
@@ -905,8 +914,10 @@ void pci_dev_init(struct device *dev)
 	if (!CONFIG(VGA_ROM_RUN))
 		return;
 
-	/* Only execute VGA ROMs. */
-	if (((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA))
+	/* Only process VGA ROMs. */
+	if (((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) &&
+		(!CONFIG(AMD_DGPU_WITHOUT_EEPROM) ||
+		((dev->class >> 8) != PCI_CLASS_DISPLAY_OTHER)))
 		return;
 
 	if (!should_load_oprom(dev))
@@ -914,12 +925,20 @@ void pci_dev_init(struct device *dev)
 	timestamp_add_now(TS_OPROM_INITIALIZE);
 
 	rom = pci_rom_probe(dev);
-	if (rom == NULL)
+	if (rom == NULL) {
+		printk(BIOS_DEBUG, "PCI_CLASS_DISPLAY_%s%s ROM probe failed\n",
+			(dev->class >> 8) == PCI_CLASS_DISPLAY_VGA ? "VGA" : "",
+			(dev->class >> 8) == PCI_CLASS_DISPLAY_OTHER ? "OTHER" : "");
 		return;
+	}
 
 	ram = pci_rom_load(dev, rom);
-	if (ram == NULL)
+	if (ram == NULL) {
+		printk(BIOS_DEBUG, "PCI_CLASS_DISPLAY_%s%s ROM load failed\n",
+			(dev->class >> 8) == PCI_CLASS_DISPLAY_VGA ? "VGA" : "",
+			(dev->class >> 8) == PCI_CLASS_DISPLAY_OTHER ? "OTHER" : "");
 		return;
+	}
 	timestamp_add_now(TS_OPROM_COPY_END);
 
 	if (!should_run_oprom(dev, rom))
diff --git a/src/device/pci_rom.c b/src/device/pci_rom.c
index bc693fb764..3d36b561d3 100644
--- a/src/device/pci_rom.c
+++ b/src/device/pci_rom.c
@@ -232,6 +232,12 @@ pci_rom_write_acpi_tables(const struct device *device, unsigned long current,
 	if ((device->class >> 16) != PCI_BASE_CLASS_DISPLAY)
 		return current;
 
+	/* Write ACPI VFCT only for Discrete VGA. */
+	/* TODO: do this also for Integrated VGA. */
+	if (CONFIG(AMD_DGPU_WITHOUT_EEPROM) &&
+		((device->class >> 8) == PCI_CLASS_DISPLAY_VGA))
+		return current;
+
 	/* Only handle enabled devices */
 	if (!device->enabled)
 		return current;
diff --git a/src/mainboard/lenovo/g505s/Kconfig b/src/mainboard/lenovo/g505s/Kconfig
index dbf8b68253..5576f6af9b 100644
--- a/src/mainboard/lenovo/g505s/Kconfig
+++ b/src/mainboard/lenovo/g505s/Kconfig
@@ -16,6 +16,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_ACPI_TABLES
 	select BOARD_ROMSIZE_KB_4096
 	select GFXUMA
+	select MAINBOARD_VERSION_HAS_AMD_DGPU_WITHOUT_EEPROM
 	select NO_UART_ON_SUPERIO
 
 config MAINBOARD_DIR
diff --git a/src/mainboard/lenovo/g505s/devicetree.cb b/src/mainboard/lenovo/g505s/devicetree.cb
index 4b4df367b1..6d7d3e526f 100644
--- a/src/mainboard/lenovo/g505s/devicetree.cb
+++ b/src/mainboard/lenovo/g505s/devicetree.cb
@@ -15,7 +15,7 @@ chip northbridge/amd/agesa/family15tn/root_complex
 			device pci 0.2 on  end # IOMMU
 			device pci 1.0 on  end # Internal Graphics P2P bridge 0x99XX
 			device pci 1.1 on  end # Internal Multimedia
-			device pci 2.0 off end
+			device pci 2.0 on  end # Discrete Graphics PCI bus 0x666X
 			device pci 3.0 off end
 			device pci 4.0 on  end # PCIE MINI0
 			device pci 5.0 on  end # PCIE MINI1