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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <stdint.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <northbridge/intel/sandybridge/raminit_native.h>
#include <southbridge/intel/bd82x6x/pch.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();
}
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