Configurable GPU root port

Change-Id: Iae1641a407e075087179f11e186092b40c0c3022

src/drivers/system76/dgpu/Kconfig

@@ -3,3 +3,10 @@ config DRIVERS_SYSTEM76_DGPU
 	default n
 	help
 		System76 switchable graphics support
+
+#TODO: make this cleaner, use device tree?
+config DRIVERS_SYSTEM76_DGPU_DEVICE
+	hex
+	default 0x01
+	help
+		System76 switchable graphics root device number

src/drivers/system76/dgpu/acpi/dgpu.asl

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 Device (\_SB.PCI0.PEGP) {
-	Name (_ADR, 0x00010000)
+	Name (_ADR, CONFIG(DRIVERS_SYSTEM76_DGPU_DEVICE) << 16)
 
 	PowerResource (PWRR, 0, 0) {
 		Name (_STA, 1)

src/drivers/system76/dgpu/ramstage.c

@@ -55,13 +55,13 @@ static struct device_operations dgpu_pci_ops_dev = {
 static void dgpu_above_4g(void *unused) {
 	struct device *pdev;
 
-	// Find PEG0
-	pdev = pcidev_on_root(1, 0);
+	// Find PEGP
+	pdev = pcidev_on_root(CONFIG(DRIVERS_SYSTEM76_DGPU_DEVICE), 0);
 	if (!pdev) {
-		printk(BIOS_ERR, "system76: failed to find PEG0\n");
+		printk(BIOS_ERR, "system76: failed to find PEGP\n");
 		return;
 	}
-	printk(BIOS_INFO, "system76: PEG0 at %p, %04x:%04x\n", pdev, pdev->vendor, pdev->device);
+	printk(BIOS_INFO, "system76: PEGP at %p, %04x:%04x\n", pdev, pdev->vendor, pdev->device);
 
     int fn;
     for (fn = 0; fn < 8; fn++) {

src/mainboard/system76/galp5/Kconfig

@@ -53,6 +53,10 @@ config CONSOLE_POST
 	bool
 	default y
 
+config DRIVERS_SYSTEM76_DGPU_DEVICE
+	hex
+	default 0x06
+
 config ONBOARD_VGA_IS_PRIMARY
 	bool
 	default y

src/mainboard/system76/galp5/acpi/mainboard.asl

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include "../gpio.h"
-// TODO: use correct scope #include <drivers/system76/dgpu/acpi/dgpu.asl>
+#include <drivers/system76/dgpu/acpi/dgpu.asl>
 
 #define EC_GPE_SCI 0x6E
 #define EC_GPE_SWI 0x6B

src/mainboard/system76/galp5/acpi/sleep.asl

@@ -5,7 +5,7 @@ Method (MPTS, 1) {
 	\_SB.PCI0.LPCB.EC0.PTS (Arg0)
 
 	// Turn DGPU on before sleeping
-	//TODO: use correct scope \_SB.PCI0.PEGP.DEV0._ON()
+	\_SB.PCI0.PEGP.DEV0._ON()
 }
 
 /* Method called from _WAK prior to wakeup */