src/soc/intel/cannonlake/graphics.c

/* This file is part of the coreboot project. */
/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <acpi/acpi.h>
#include <bootmode.h>
#include <console/console.h>
#include <fsp/util.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <drivers/intel/gma/i915_reg.h>
#include <drivers/intel/gma/libgfxinit.h>
#include <drivers/intel/gma/opregion.h>
#include <intelblocks/graphics.h>
#include <types.h>

uintptr_t fsp_soc_get_igd_bar(void)
{
	return graphics_get_memory_base();
}

void graphics_soc_init(struct device *dev)
{
	uint32_t 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 do 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 | DDI_INIT_DISPLAY_DETECTED |
				DDI_BUF_IS_IDLE);
		graphics_gtt_write(DDI_BUF_CTL_A, ddi_buf_ctl);
	}

	/* IGD needs to Bus Master */
	pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY |
			PCI_COMMAND_IO);

	/*
	 * GFX PEIM module inside FSP binary is taking care of graphics
	 * initialization based on RUN_FSP_GOP Kconfig option and input
	 * VBT file.
	 *
	 * In case of non-FSP solution, SoC need to select another
	 * Kconfig to perform GFX initialization.
	 */
	if (CONFIG(RUN_FSP_GOP)) {
		/* nothing to do */
	} else if (CONFIG(MAINBOARD_USE_LIBGFXINIT)) {
		if (!acpi_is_wakeup_s3() && display_init_required()) {
			int lightup_ok;
			gma_gfxinit(&lightup_ok);
			gfx_set_init_done(lightup_ok);
		}
	} else {
		/* Initialize PCI device, load/execute BIOS Option ROM */
		pci_dev_init(dev);
	}
}

uintptr_t graphics_soc_write_acpi_opregion(const struct device *device,
		uintptr_t current, struct acpi_rsdp *rsdp)
{
	igd_opregion_t *opregion;

	printk(BIOS_DEBUG, "ACPI:    * IGD OpRegion\n");
	opregion = (igd_opregion_t *)current;

	if (intel_gma_init_igd_opregion(opregion) != CB_SUCCESS)
		return current;

	current += sizeof(igd_opregion_t);

	return acpi_align_current(current);
}