1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <device/pci_ops.h>
4 #include <device/pci_def.h>
5 #include <southbridge/intel/bd82x6x/pch.h>
6 #include <ec/lenovo/pmh7/pmh7.h>
7 #include <drivers/lenovo/hybrid_graphics/hybrid_graphics.h>
8 #include <northbridge/intel/sandybridge/sandybridge.h>
9
hybrid_graphics_init(void)10 static void hybrid_graphics_init(void)
11 {
12 bool peg, igd;
13 u32 reg32;
14
15 early_hybrid_graphics(&igd, &peg);
16
17 if (peg && igd)
18 return;
19
20 /* Hide disabled devices */
21 reg32 = pci_read_config32(PCI_DEV(0, 0, 0), DEVEN);
22 reg32 &= ~(DEVEN_PEG10 | DEVEN_IGD);
23
24 if (peg)
25 reg32 |= DEVEN_PEG10;
26
27 if (igd)
28 reg32 |= DEVEN_IGD;
29 else
30 /* Disable IGD VGA decode, no GTT or GFX stolen */
31 pci_write_config16(PCI_DEV(0, 0, 0), GGC, 2);
32
33 pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, reg32);
34 }
35
mainboard_early_init(int s3resume)36 void mainboard_early_init(int s3resume)
37 {
38 hybrid_graphics_init();
39 }
40