[S] Change in coreboot[main]: mb/emulation/qemu-q35: Disable SB SSDT

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/86601?usp=email )

Change subject: mb/emulation/qemu-q35: Disable SB SSDT
......................................................................

mb/emulation/qemu-q35: Disable SB SSDT

On QEMU the DSDT contains the _PRT, thus disable the southbridge
SSDT generator to prevent an ACPI naming conflict.

Change-Id: I894980dc7094f6047a088c39e10cac7381b74f86
Signed-off-by: Patrick Rudolph 
---
M src/mainboard/emulation/qemu-i440fx/mainboard.c
M src/mainboard/emulation/qemu-q35/mainboard.c
2 files changed, 10 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/01/86601/1

diff --git a/src/mainboard/emulation/qemu-i440fx/mainboard.c b/src/mainboard/emulation/qemu-i440fx/mainboard.c
index 7debf8c..0b2e2bb 100644
--- a/src/mainboard/emulation/qemu-i440fx/mainboard.c
+++ b/src/mainboard/emulation/qemu-i440fx/mainboard.c
@@ -29,6 +29,11 @@
    	if (d)
    		pci_assign_irqs(d, qemu_i440fx_irqs + (i % 4));
    }
+
+	/* Disable ACPI SSDT on LPC, it's already part of DSDT (by QEMU) */
+	struct device *lpc = pcidev_on_root(0x1f, 0);
+	if (lpc && lpc->ops)
+		lpc->ops->acpi_fill_ssdt = NULL;
 }

static void qemu_nb_read_resources(struct device *dev)
diff --git a/src/mainboard/emulation/qemu-q35/mainboard.c b/src/mainboard/emulation/qemu-q35/mainboard.c
index 1ff4c04..23ccb7c 100644
--- a/src/mainboard/emulation/qemu-q35/mainboard.c
+++ b/src/mainboard/emulation/qemu-q35/mainboard.c
@@ -42,6 +42,11 @@
    	if (d)
    		pci_assign_irqs(d, qemu_q35_irqs);
    }
+
+	/* Disable ACPI SSDT on LPC, it's already part of DSDT (by QEMU) */
+	struct device *lpc = pcidev_on_root(0x1f, 0);
+	if (lpc && lpc->ops)
+		lpc->ops->acpi_fill_ssdt = NULL;
 }

static void qemu_nb_read_resources(struct device *dev)