| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <types.h> |
| #include <device/pci_ops.h> |
| #include <device/pci_def.h> |
| #include <northbridge/intel/sandybridge/sandybridge.h> |
| #include <drivers/lenovo/hybrid_graphics/hybrid_graphics.h> |
| #include <device/device.h> |
| |
| static void hybrid_graphics_init(void) |
| { |
| bool peg, igd; |
| u32 reg32; |
| |
| 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); |
| |
| if (peg) |
| reg32 |= DEVEN_PEG10; |
| |
| if (igd) |
| reg32 |= DEVEN_IGD; |
| else |
| /* Disable IGD VGA decode, no GTT or GFX stolen */ |
| pci_write_config16(PCI_DEV(0, 0, 0), GGC, 2); |
| |
| pci_write_config32(PCI_DEV(0, 0, 0), DEVEN, reg32); |
| } |
| |
| void mainboard_early_init(int s3resume) |
| { |
| hybrid_graphics_init(); |
| } |