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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2015-2017 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <device/pci.h>
#include <drivers/intel/gma/i915_reg.h>
#include <intelblocks/graphics.h>
#include <drivers/intel/gma/opregion.h>
#include <soc/ramstage.h>
uintptr_t fsp_soc_get_igd_bar(void)
{
return graphics_get_memory_base();
}
void graphics_soc_init(struct device *dev)
{
u32 ddi_buf_ctl;
/*
* Enable DDI-A (eDP) 4-lane operation if the link is not up yet.
* This will allow the kernel to use 4-lane eDP links properly
* if the VBIOS or GOP driver does not execute.
*/
ddi_buf_ctl = graphics_gtt_read(DDI_BUF_CTL_A);
if (!acpi_is_wakeup_s3() && !(ddi_buf_ctl & DDI_BUF_CTL_ENABLE)) {
ddi_buf_ctl |= DDI_A_4_LANES;
graphics_gtt_write(DDI_BUF_CTL_A, ddi_buf_ctl);
}
/*
* GFX PEIM module inside FSP binary is taking care of graphics
* initialization based on INTEL_GMA_ADD_VBT_DATA_FILE Kconfig
* option and input VBT file. Hence no need to load/execute legacy VGA
* OpROM in order to initialize GFX.
*
* In case of non-FSP solution, SoC need to select VGA_ROM_RUN
* Kconfig to perform GFX initialization through VGA OpRom.
*/
if (IS_ENABLED(CONFIG_INTEL_GMA_ADD_VBT_DATA_FILE))
return;
/* IGD needs to Bus Master */
u32 reg32 = pci_read_config32(dev, PCI_COMMAND);
reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
pci_write_config32(dev, PCI_COMMAND, reg32);
/* Initialize PCI device, load/execute BIOS Option ROM */
pci_dev_init(dev);
}
/* Initialize IGD OpRegion, called from ACPI code */
static void update_igd_opregion(igd_opregion_t *opregion)
{
/* FIXME: Add platform specific mailbox initialization */
}
uintptr_t graphics_soc_write_acpi_opregion(struct device *device,
uintptr_t current, struct acpi_rsdp *rsdp)
{
igd_opregion_t *opregion;
/* If GOP is not used, exit here */
if (!IS_ENABLED(CONFIG_INTEL_GMA_ADD_VBT_DATA_FILE))
return current;
/* If IGD is disabled, exit here */
if (pci_read_config16(device, PCI_VENDOR_ID) == 0xFFFF)
return current;
printk(BIOS_DEBUG, "ACPI: * IGD OpRegion\n");
opregion = (igd_opregion_t *)current;
if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
return current;
update_igd_opregion(opregion);
current += sizeof(igd_opregion_t);
current = acpi_align_current(current);
printk(BIOS_DEBUG, "current = %lx\n", current);
return current;
}
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