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-rw-r--r--src/mainboard/lenovo/t420/cmos.layout1
-rw-r--r--src/mainboard/lenovo/t420/romstage.c3
2 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t420/cmos.layout b/src/mainboard/lenovo/t420/cmos.layout
index 5a9e570c3f..f55c2037d5 100644
--- a/src/mainboard/lenovo/t420/cmos.layout
+++ b/src/mainboard/lenovo/t420/cmos.layout
@@ -129,6 +129,7 @@ enumerations
11 6 224M
12 0 Integrated Only
12 1 Discrete Only
+12 2 Dual Graphics
13 0 Disable
13 1 AC and battery
13 2 AC only
diff --git a/src/mainboard/lenovo/t420/romstage.c b/src/mainboard/lenovo/t420/romstage.c
index 36e83a3c72..bef256200e 100644
--- a/src/mainboard/lenovo/t420/romstage.c
+++ b/src/mainboard/lenovo/t420/romstage.c
@@ -30,6 +30,9 @@ static void hybrid_graphics_init(void)
early_hybrid_graphics(&igd, &peg);
+ if (peg && igd)
+ return;
+
/* Hide disabled devices */
reg32 = pci_read_config32(PCI_DEV(0, 0, 0), DEVEN);
reg32 &= ~(DEVEN_PEG10 | DEVEN_IGD);