/* SPDX-License-Identifier: GPL-2.0-only */

#include <arch/io.h>
#include <device/mmio.h>
#include <console/console.h>
#include <bootmode.h>
#include <cpu/intel/model_206ax/model_206ax.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <drivers/intel/gma/libgfxinit.h>
#include <drivers/intel/gma/opregion.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <types.h>

#include "chip.h"
#include "sandybridge.h"

struct gt_powermeter {
	u16 reg;
	u32 value;
};

static const struct gt_powermeter snb_pm_gt1[] = {
	{ 0xa200, 0xcc000000 },
	{ 0xa204, 0x07000040 },
	{ 0xa208, 0x0000fe00 },
	{ 0xa20c, 0x00000000 },
	{ 0xa210, 0x17000000 },
	{ 0xa214, 0x00000021 },
	{ 0xa218, 0x0817fe19 },
	{ 0xa21c, 0x00000000 },
	{ 0xa220, 0x00000000 },
	{ 0xa224, 0xcc000000 },
	{ 0xa228, 0x07000040 },
	{ 0xa22c, 0x0000fe00 },
	{ 0xa230, 0x00000000 },
	{ 0xa234, 0x17000000 },
	{ 0xa238, 0x00000021 },
	{ 0xa23c, 0x0817fe19 },
	{ 0xa240, 0x00000000 },
	{ 0xa244, 0x00000000 },
	{ 0xa248, 0x8000421e },
	{ 0 },
};

static const struct gt_powermeter snb_pm_gt2[] = {
	{ 0xa200, 0x330000a6 },
	{ 0xa204, 0x402d0031 },
	{ 0xa208, 0x00165f83 },
	{ 0xa20c, 0xf1000000 },
	{ 0xa210, 0x00000000 },
	{ 0xa214, 0x00160016 },
	{ 0xa218, 0x002a002b },
	{ 0xa21c, 0x00000000 },
	{ 0xa220, 0x00000000 },
	{ 0xa224, 0x330000a6 },
	{ 0xa228, 0x402d0031 },
	{ 0xa22c, 0x00165f83 },
	{ 0xa230, 0xf1000000 },
	{ 0xa234, 0x00000000 },
	{ 0xa238, 0x00160016 },
	{ 0xa23c, 0x002a002b },
	{ 0xa240, 0x00000000 },
	{ 0xa244, 0x00000000 },
	{ 0xa248, 0x8000421e },
	{ 0 },
};

static const struct gt_powermeter ivb_pm_gt1[] = {
	{ 0xa800, 0x00000000 },
	{ 0xa804, 0x00021c00 },
	{ 0xa808, 0x00000403 },
	{ 0xa80c, 0x02001700 },
	{ 0xa810, 0x05000200 },
	{ 0xa814, 0x00000000 },
	{ 0xa818, 0x00690500 },
	{ 0xa81c, 0x0000007f },
	{ 0xa820, 0x01002501 },
	{ 0xa824, 0x00000300 },
	{ 0xa828, 0x01000331 },
	{ 0xa82c, 0x0000000c },
	{ 0xa830, 0x00010016 },
	{ 0xa834, 0x01100101 },
	{ 0xa838, 0x00010103 },
	{ 0xa83c, 0x00041300 },
	{ 0xa840, 0x00000b30 },
	{ 0xa844, 0x00000000 },
	{ 0xa848, 0x7f000000 },
	{ 0xa84c, 0x05000008 },
	{ 0xa850, 0x00000001 },
	{ 0xa854, 0x00000004 },
	{ 0xa858, 0x00000007 },
	{ 0xa85c, 0x00000000 },
	{ 0xa860, 0x00010000 },
	{ 0xa248, 0x0000221e },
	{ 0xa900, 0x00000000 },
	{ 0xa904, 0x00001c00 },
	{ 0xa908, 0x00000000 },
	{ 0xa90c, 0x06000000 },
	{ 0xa910, 0x09000200 },
	{ 0xa914, 0x00000000 },
	{ 0xa918, 0x00590000 },
	{ 0xa91c, 0x00000000 },
	{ 0xa920, 0x04002501 },
	{ 0xa924, 0x00000100 },
	{ 0xa928, 0x03000410 },
	{ 0xa92c, 0x00000000 },
	{ 0xa930, 0x00020000 },
	{ 0xa934, 0x02070106 },
	{ 0xa938, 0x00010100 },
	{ 0xa93c, 0x00401c00 },
	{ 0xa940, 0x00000000 },
	{ 0xa944, 0x00000000 },
	{ 0xa948, 0x10000e00 },
	{ 0xa94c, 0x02000004 },
	{ 0xa950, 0x00000001 },
	{ 0xa954, 0x00000004 },
	{ 0xa960, 0x00060000 },
	{ 0xaa3c, 0x00001c00 },
	{ 0xaa54, 0x00000004 },
	{ 0xaa60, 0x00060000 },
	{ 0 },
};

static const struct gt_powermeter ivb_pm_gt2_17w[] = {
	{ 0xa800, 0x20000000 },
	{ 0xa804, 0x000e3800 },
	{ 0xa808, 0x00000806 },
	{ 0xa80c, 0x0c002f00 },
	{ 0xa810, 0x0c000800 },
	{ 0xa814, 0x00000000 },
	{ 0xa818, 0x00d20d00 },
	{ 0xa81c, 0x000000ff },
	{ 0xa820, 0x03004b02 },
	{ 0xa824, 0x00000600 },
	{ 0xa828, 0x07000773 },
	{ 0xa82c, 0x00000000 },
	{ 0xa830, 0x00020032 },
	{ 0xa834, 0x1520040d },
	{ 0xa838, 0x00020105 },
	{ 0xa83c, 0x00083700 },
	{ 0xa840, 0x000016ff },
	{ 0xa844, 0x00000000 },
	{ 0xa848, 0xff000000 },
	{ 0xa84c, 0x0a000010 },
	{ 0xa850, 0x00000002 },
	{ 0xa854, 0x00000008 },
	{ 0xa858, 0x0000000f },
	{ 0xa85c, 0x00000000 },
	{ 0xa860, 0x00020000 },
	{ 0xa248, 0x0000221e },
	{ 0xa900, 0x00000000 },
	{ 0xa904, 0x00003800 },
	{ 0xa908, 0x00000000 },
	{ 0xa90c, 0x0c000000 },
	{ 0xa910, 0x12000800 },
	{ 0xa914, 0x00000000 },
	{ 0xa918, 0x00b20000 },
	{ 0xa91c, 0x00000000 },
	{ 0xa920, 0x08004b02 },
	{ 0xa924, 0x00000300 },
	{ 0xa928, 0x01000820 },
	{ 0xa92c, 0x00000000 },
	{ 0xa930, 0x00030000 },
	{ 0xa934, 0x15150406 },
	{ 0xa938, 0x00020300 },
	{ 0xa93c, 0x00903900 },
	{ 0xa940, 0x00000000 },
	{ 0xa944, 0x00000000 },
	{ 0xa948, 0x20001b00 },
	{ 0xa94c, 0x0a000010 },
	{ 0xa950, 0x00000000 },
	{ 0xa954, 0x00000008 },
	{ 0xa960, 0x00110000 },
	{ 0xaa3c, 0x00003900 },
	{ 0xaa54, 0x00000008 },
	{ 0xaa60, 0x00110000 },
	{ 0 },
};

static const struct gt_powermeter ivb_pm_gt2_35w[] = {
	{ 0xa800, 0x00000000 },
	{ 0xa804, 0x00030400 },
	{ 0xa808, 0x00000806 },
	{ 0xa80c, 0x0c002f00 },
	{ 0xa810, 0x0c000300 },
	{ 0xa814, 0x00000000 },
	{ 0xa818, 0x00d20d00 },
	{ 0xa81c, 0x000000ff },
	{ 0xa820, 0x03004b02 },
	{ 0xa824, 0x00000600 },
	{ 0xa828, 0x07000773 },
	{ 0xa82c, 0x00000000 },
	{ 0xa830, 0x00020032 },
	{ 0xa834, 0x1520040d },
	{ 0xa838, 0x00020105 },
	{ 0xa83c, 0x00083700 },
	{ 0xa840, 0x000016ff },
	{ 0xa844, 0x00000000 },
	{ 0xa848, 0xff000000 },
	{ 0xa84c, 0x0a000010 },
	{ 0xa850, 0x00000001 },
	{ 0xa854, 0x00000008 },
	{ 0xa858, 0x00000008 },
	{ 0xa85c, 0x00000000 },
	{ 0xa860, 0x00020000 },
	{ 0xa248, 0x0000221e },
	{ 0xa900, 0x00000000 },
	{ 0xa904, 0x00003800 },
	{ 0xa908, 0x00000000 },
	{ 0xa90c, 0x0c000000 },
	{ 0xa910, 0x12000800 },
	{ 0xa914, 0x00000000 },
	{ 0xa918, 0x00b20000 },
	{ 0xa91c, 0x00000000 },
	{ 0xa920, 0x08004b02 },
	{ 0xa924, 0x00000300 },
	{ 0xa928, 0x01000820 },
	{ 0xa92c, 0x00000000 },
	{ 0xa930, 0x00030000 },
	{ 0xa934, 0x15150406 },
	{ 0xa938, 0x00020300 },
	{ 0xa93c, 0x00903900 },
	{ 0xa940, 0x00000000 },
	{ 0xa944, 0x00000000 },
	{ 0xa948, 0x20001b00 },
	{ 0xa94c, 0x0a000010 },
	{ 0xa950, 0x00000000 },
	{ 0xa954, 0x00000008 },
	{ 0xa960, 0x00110000 },
	{ 0xaa3c, 0x00003900 },
	{ 0xaa54, 0x00000008 },
	{ 0xaa60, 0x00110000 },
	{ 0 },
};

/*
 * Some VGA option roms are used for several chipsets but they only have one PCI ID in their
 * header. If we encounter such an option rom, we need to do the mapping ourselves.
 */

u32 map_oprom_vendev(u32 vendev)
{
	u32 new_vendev = vendev;

	switch (vendev) {
	case 0x80860102:		/* SNB GT1 Desktop */
	case 0x8086010a:		/* SNB GT1 Server  */
	case 0x80860112:		/* SNB GT2 Desktop */
	case 0x80860116:		/* SNB GT2 Mobile  */
	case 0x80860122:		/* SNB GT2 Desktop >=1.3GHz */
	case 0x80860126:		/* SNB GT2 Mobile  >=1.3GHz */
	case 0x80860152:		/* IVB GT1 Desktop */
	case 0x80860156:		/* IVB GT1 Mobile  */
	case 0x80860162:		/* IVB GT2 Desktop */
	case 0x80860166:		/* IVB GT2 Mobile  */
	case 0x8086016a:		/* IVB GT2 Server  */
		new_vendev = 0x80860106;/* SNB GT1 Mobile  */
		break;
	}

	return new_vendev;
}

static struct resource *gtt_res = NULL;

u32 gtt_read(u32 reg)
{
	return read32(res2mmio(gtt_res, reg, 0));
}

void gtt_write(u32 reg, u32 data)
{
	write32(res2mmio(gtt_res, reg, 0), data);
}

static inline void gtt_write_powermeter(const struct gt_powermeter *pm)
{
	for (; pm && pm->reg; pm++)
		gtt_write(pm->reg, pm->value);
}

#define GTT_RETRY 1000
int gtt_poll(u32 reg, u32 mask, u32 value)
{
	unsigned int try = GTT_RETRY;
	u32 data;

	while (try--) {
		data = gtt_read(reg);
		if ((data & mask) == value)
			return 1;
		udelay(10);
	}

	printk(BIOS_ERR, "GT init timeout\n");
	return 0;
}

static void gma_pm_init_pre_vbios(struct device *dev)
{
	const bool is_sandy = is_sandybridge();

	u32 reg32;

	printk(BIOS_DEBUG, "GT Power Management Init\n");

	gtt_res = probe_resource(dev, PCI_BASE_ADDRESS_0);
	if (!gtt_res || !gtt_res->base)
		return;

	if (is_sandy || cpu_stepping() < IVB_STEP_C0) {
		/* 1: Enable force wake */
		gtt_write(0xa18c, 0x00000001);
		gtt_poll(0x130090, (1 << 0), (1 << 0));
	} else {
		gtt_write(0xa180, 1 << 5);
		gtt_write(0xa188, 0xffff0001);
		gtt_poll(0x130040, (1 << 0), (1 << 0));
	}

	if (is_sandy) {
		/* 1d: Set GTT+0x42004 [15:14]=11 (SnB C1+) */
		reg32 = gtt_read(0x42004);
		reg32 |= (1 << 14) | (1 << 15);
		gtt_write(0x42004, reg32);
	}

	if (!is_sandy) {
		/* Display Reset Acknowledge Settings */
		reg32 = gtt_read(0x45010);
		reg32 |= (1 << 1) | (1 << 0);
		gtt_write(0x45010, reg32);
	}

	/* 2: Get GT SKU from GTT+0x911c[13] */
	reg32 = gtt_read(0x911c);
	if (is_sandy) {
		if (reg32 & (1 << 13)) {
			printk(BIOS_DEBUG, "SNB GT1 Power Meter Weights\n");
			gtt_write_powermeter(snb_pm_gt1);
		} else {
			printk(BIOS_DEBUG, "SNB GT2 Power Meter Weights\n");
			gtt_write_powermeter(snb_pm_gt2);
		}
	} else {
		u32 unit = mchbar_read32(0x5938) & 0xf;

		if (reg32 & (1 << 13)) {
			/* GT1 SKU */
			printk(BIOS_DEBUG, "IVB GT1 Power Meter Weights\n");
			gtt_write_powermeter(ivb_pm_gt1);
		} else {
			/* GT2 SKU */
			u32 tdp = mchbar_read32(0x5930) & 0x7fff;
			tdp /= (1 << unit);

			if (tdp <= 17) {
				/* <=17W ULV */
				printk(BIOS_DEBUG, "IVB GT2 17W Power Meter Weights\n");
				gtt_write_powermeter(ivb_pm_gt2_17w);
			} else if ((tdp >= 25) && (tdp <= 35)) {
				/* 25W-35W */
				printk(BIOS_DEBUG, "IVB GT2 25W-35W Power Meter Weights\n");
				gtt_write_powermeter(ivb_pm_gt2_35w);
			} else {
				/* All others */
				printk(BIOS_DEBUG, "IVB GT2 35W Power Meter Weights\n");
				gtt_write_powermeter(ivb_pm_gt2_35w);
			}
		}
	}

	/* 3: Gear ratio map */
	gtt_write(0xa004, 0x00000010);

	/* 4: GFXPAUSE */
	gtt_write(0xa000, 0x00070020);

	/* 5: Dynamic EU trip control */
	gtt_write(0xa080, 0x00000004);

	/* 6: ECO bits */
	reg32 = gtt_read(0xa180);
	reg32 |= (1 << 26) | (1 << 31);
	/* (bit 20=1 for SNB step D1+ / IVB A0+) */
	if (!is_sandy || cpu_stepping() >= SNB_STEP_D1)
		reg32 |= (1 << 20);
	gtt_write(0xa180, reg32);

	/* 6a: for SnB step D2+ only */
	if (is_sandy && cpu_stepping() >= SNB_STEP_D2) {
		reg32 = gtt_read(0x9400);
		reg32 |= (1 << 7);
		gtt_write(0x9400, reg32);

		reg32 = gtt_read(0x941c);
		reg32 &= 0xf;
		reg32 |= (1 << 1);
		gtt_write(0x941c, reg32);
		gtt_poll(0x941c, (1 << 1), (0 << 1));
	}

	if (is_sandy) {
		/* 6b: Clocking reset controls */
		gtt_write(0x9424, 0x00000000);
	} else {
		reg32 = gtt_read(0x907c);
		reg32 |= (1 << 16);
		gtt_write(0x907c, reg32);

		/* 6b: Clocking reset controls */
		gtt_write(0x9424, 0x00000001);
	}

	/* 7 */
	if (gtt_poll(0x138124, (1 << 31), (0 << 31))) {
		gtt_write(0x138128, 0x00000029); /* Mailbox Data */
		gtt_write(0x138124, 0x80000004); /* Mailbox Cmd for RC6 VID */
		if (gtt_poll(0x138124, (1 << 31), (0 << 31)))
			gtt_write(0x138124, 0x8000000a);
		gtt_poll(0x138124, (1 << 31), (0 << 31));
	}

	/* 8 */
	gtt_write(0xa090, 0x00000000); /* RC Control */
	gtt_write(0xa098, 0x03e80000); /* RC1e Wake Rate Limit */
	gtt_write(0xa09c, 0x0028001e); /* RC6/6p Wake Rate Limit */
	gtt_write(0xa0a0, 0x0000001e); /* RC6pp Wake Rate Limit */
	gtt_write(0xa0a8, 0x0001e848); /* RC Evaluation Interval */
	gtt_write(0xa0ac, 0x00000019); /* RC Idle Hysteresis */

	/* 9 */
	gtt_write(0x2054, 0x0000000a); /* Render Idle Max Count */
	gtt_write(0x12054,0x0000000a); /* Video Idle Max Count */
	gtt_write(0x22054,0x0000000a); /* Blitter Idle Max Count */

	/* 10 */
	gtt_write(0xa0b0, 0x00000000); /* Unblock Ack to Busy */
	gtt_write(0xa0b4, 0x000003e8); /* RC1e Threshold */
	gtt_write(0xa0b8, 0x0000c350); /* RC6 Threshold */
	gtt_write(0xa0bc, 0x000186a0); /* RC6p Threshold */
	gtt_write(0xa0c0, 0x0000fa00); /* RC6pp Threshold */

	/* 11 */
	gtt_write(0xa010, 0x000f4240); /* RP Down Timeout */
	gtt_write(0xa014, 0x12060000); /* RP Interrupt Limits */
	gtt_write(0xa02c, 0x00015f90); /* RP Up Threshold */
	gtt_write(0xa030, 0x000186a0); /* RP Down Threshold */
	gtt_write(0xa068, 0x000186a0); /* RP Up EI */
	gtt_write(0xa06c, 0x000493e0); /* RP Down EI */
	gtt_write(0xa070, 0x0000000a); /* RP Idle Hysteresis */

	/*
	 * 11a: Enable Render Standby (RC6)
	 *
	 * IvyBridge should also support DeepRenderStandby.
	 *
	 * Unfortunately it does not work reliably on all SKUs so
	 * disable it here and it can be enabled by the kernel.
	 */
	gtt_write(0xa090, 0x88040000); /* HW RC Control */

	/* 12: Normal Frequency Request */
	/* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 */
	/* only the lower 7 bits are used and shifted left by 25 */
	reg32 = mchbar_read32(0x5998);
	reg32 >>= 16;
	reg32 &= 0x7f;
	reg32 <<= 25;
	gtt_write(0xa008, reg32);

	/* 13: RP Control */
	gtt_write(0xa024, 0x00000592);

	/* 14: Enable PM Interrupts */
	gtt_write(0x4402c, 0x03000076);

	/* Clear 0x6c024 [8:6] */
	reg32 = gtt_read(0x6c024);
	reg32 &= ~0x000001c0;
	gtt_write(0x6c024, reg32);

	/* Initialize DP buffer translation with recommended defaults */
	gtt_write(0xe4f00, 0x0100030c);
	gtt_write(0xe4f04, 0x00b8230c);
	gtt_write(0xe4f08, 0x06f8930c);
	gtt_write(0xe4f0c, 0x05f8e38e);
	gtt_write(0xe4f10, 0x00b8030c);
	gtt_write(0xe4f14, 0x0b78830c);
	gtt_write(0xe4f18, 0x09f8d3cf);
	gtt_write(0xe4f1c, 0x01e8030c);
	gtt_write(0xe4f20, 0x09f863cf);
	gtt_write(0xe4f24, 0x0ff803cf);
}

static void gma_pm_init_post_vbios(struct device *dev)
{
	struct northbridge_intel_sandybridge_config *conf = dev->chip_info;
	u32 reg32;

	printk(BIOS_DEBUG, "GT Power Management Init (post VBIOS)\n");

	/* 15: Deassert Force Wake */
	if (is_sandybridge() || cpu_stepping() < IVB_STEP_C0) {
		gtt_write(0xa18c, gtt_read(0xa18c) & ~1);
		gtt_poll(0x130090, (1 << 0), (0 << 0));
	} else {
		gtt_write(0xa188, 0x1fffe);
		if (gtt_poll(0x130040, (1 << 0), (0 << 0)))
			gtt_write(0xa188, gtt_read(0xa188) | 1);
	}

	/* 16: SW RC Control */
	gtt_write(0xa094, 0x00060000);

	/* Setup Digital Port Hotplug */
	reg32 = gtt_read(0xc4030);
	if (!reg32) {
		reg32  = (conf->gpu_dp_b_hotplug & 0x7) <<  2;
		reg32 |= (conf->gpu_dp_c_hotplug & 0x7) << 10;
		reg32 |= (conf->gpu_dp_d_hotplug & 0x7) << 18;
		gtt_write(0xc4030, reg32);
	}

	/* Setup Panel Power On Delays */
	reg32 = gtt_read(0xc7208);
	if (!reg32) {
		reg32 = (conf->gpu_panel_port_select & 0x3) << 30;
		reg32 |= (conf->gpu_panel_power_up_delay & 0x1fff) << 16;
		reg32 |= (conf->gpu_panel_power_backlight_on_delay & 0x1fff);
		gtt_write(0xc7208, reg32);
	}

	/* Setup Panel Power Off Delays */
	reg32 = gtt_read(0xc720c);
	if (!reg32) {
		reg32 = (conf->gpu_panel_power_down_delay & 0x1fff) << 16;
		reg32 |= (conf->gpu_panel_power_backlight_off_delay & 0x1fff);
		gtt_write(0xc720c, reg32);
	}

	/* Setup Panel Power Cycle Delay */
	if (conf->gpu_panel_power_cycle_delay) {
		reg32 = gtt_read(0xc7210);
		reg32 &= ~0xff;
		reg32 |= conf->gpu_panel_power_cycle_delay & 0xff;
		gtt_write(0xc7210, reg32);
	}

	/* Enable Backlight if needed */
	if (conf->gpu_cpu_backlight) {
		gtt_write(0x48250, (1 << 31));
		gtt_write(0x48254, conf->gpu_cpu_backlight);
	}
	if (conf->gpu_pch_backlight) {
		gtt_write(0xc8250, (1 << 31));
		gtt_write(0xc8254, conf->gpu_pch_backlight);
	}
}

/* Enable SCI to ACPI _GPE._L06 */
static void gma_enable_swsci(void)
{
	u16 reg16;

	/* Clear DMISCI status */
	reg16 = inw(DEFAULT_PMBASE + TCO1_STS);
	reg16 &= DMISCI_STS;
	outw(reg16, DEFAULT_PMBASE + TCO1_STS);

	/* Clear ACPI TCO status */
	outl(TCOSCI_STS, DEFAULT_PMBASE + GPE0_STS);

	/* Enable ACPI TCO SCIs */
	reg16 = inw(DEFAULT_PMBASE + GPE0_EN);
	reg16 |= TCOSCI_EN;
	outw(reg16, DEFAULT_PMBASE + GPE0_EN);
}

static void gma_func0_init(struct device *dev)
{
	intel_gma_init_igd_opregion();

	/* Init graphics power management */
	gma_pm_init_pre_vbios(dev);

	if (!CONFIG(NO_GFX_INIT))
		pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);

	if (!CONFIG(MAINBOARD_USE_LIBGFXINIT))
		/* PCI Init, will run VBIOS */
		pci_dev_init(dev);

	/* Post VBIOS init */
	gma_pm_init_post_vbios(dev);

	int vga_disable = (pci_read_config16(dev, GGC) & 2) >> 1;

	/* Running graphics init on S3 breaks Linux drm driver. */
	if (!acpi_is_wakeup_s3() &&
	    CONFIG(MAINBOARD_USE_LIBGFXINIT)) {
		if (vga_disable) {
			printk(BIOS_INFO,
			       "IGD is not decoding legacy VGA MEM and IO: skipping NATIVE graphic init\n");
		} else {
			/* This should probably run before post VBIOS init. */
			printk(BIOS_SPEW, "Initializing VGA without OPROM.\n");
			int lightup_ok;
			gma_gfxinit(&lightup_ok);
			if (lightup_ok)
				gfx_set_init_done(1);
		}
	}

	gma_enable_swsci();
}

static void gma_generate_ssdt(const struct device *device)
{
	const struct northbridge_intel_sandybridge_config *chip = device->chip_info;

	drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
}

static const char *gma_acpi_name(const struct device *dev)
{
	return "GFX0";
}

/* Called by PCI set_vga_bridge function */
static void gma_func0_disable(struct device *dev)
{
	/* Disable VGA decode */
	pci_or_config16(pcidev_on_root(0, 0), GGC, 1 << 1);

	dev->enabled = 0;
}

struct device_operations sandybridge_gma_func0_ops = {
	.read_resources         = pci_dev_read_resources,
	.set_resources          = pci_dev_set_resources,
	.enable_resources       = pci_dev_enable_resources,
	.acpi_fill_ssdt		= gma_generate_ssdt,
	.init                   = gma_func0_init,
	.vga_disable                = gma_func0_disable,
	.ops_pci                = &pci_dev_ops_pci,
	.acpi_name              = gma_acpi_name,
};