u-boot/drivers/video/broadwell_igd.c

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/*
* From coreboot src/soc/intel/broadwell/igd.c
*
* Copyright (C) 2016 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <bios_emul.h>
#include <dm.h>
#include <vbe.h>
#include <video.h>
#include <asm/cpu.h>
#include <asm/intel_regs.h>
#include <asm/io.h>
#include <asm/mtrr.h>
#include <asm/arch/cpu.h>
#include <asm/arch/iomap.h>
#include <asm/arch/pch.h>
#include "i915_reg.h"
struct broadwell_igd_priv {
u8 *regs;
};
struct broadwell_igd_plat {
u32 dp_hotplug[3];
int port_select;
int power_up_delay;
int power_backlight_on_delay;
int power_down_delay;
int power_backlight_off_delay;
int power_cycle_delay;
int cpu_backlight;
int pch_backlight;
int cdclk;
int pre_graphics_delay;
};
#define GT_RETRY 1000
#define GT_CDCLK_337 0
#define GT_CDCLK_450 1
#define GT_CDCLK_540 2
#define GT_CDCLK_675 3
u32 board_map_oprom_vendev(u32 vendev)
{
return SA_IGD_OPROM_VENDEV;
}
static int poll32(u8 *addr, uint mask, uint value)
{
ulong start;
start = get_timer(0);
debug("%s: addr %p = %x\n", __func__, addr, readl(addr));
while ((readl(addr) & mask) != value) {
if (get_timer(start) > GT_RETRY) {
debug("poll32: timeout: %x\n", readl(addr));
return -ETIMEDOUT;
}
}
return 0;
}
static int haswell_early_init(struct udevice *dev)
{
struct broadwell_igd_priv *priv = dev_get_priv(dev);
u8 *regs = priv->regs;
int ret;
/* Enable Force Wake */
writel(0x00000020, regs + 0xa180);
writel(0x00010001, regs + 0xa188);
ret = poll32(regs + 0x130044, 1, 1);
if (ret)
goto err;
/* Enable Counters */
setbits_le32(regs + 0xa248, 0x00000016);
/* GFXPAUSE settings */
writel(0x00070020, regs + 0xa000);
/* ECO Settings */
clrsetbits_le32(regs + 0xa180, ~0xff3fffff, 0x15000000);
/* Enable DOP Clock Gating */
writel(0x000003fd, regs + 0x9424);
/* Enable Unit Level Clock Gating */
writel(0x00000080, regs + 0x9400);
writel(0x40401000, regs + 0x9404);
writel(0x00000000, regs + 0x9408);
writel(0x02000001, regs + 0x940c);
/*
* RC6 Settings
*/
/* Wake Rate Limits */
setbits_le32(regs + 0xa090, 0x00000000);
setbits_le32(regs + 0xa098, 0x03e80000);
setbits_le32(regs + 0xa09c, 0x00280000);
setbits_le32(regs + 0xa0a8, 0x0001e848);
setbits_le32(regs + 0xa0ac, 0x00000019);
/* Render/Video/Blitter Idle Max Count */
writel(0x0000000a, regs + 0x02054);
writel(0x0000000a, regs + 0x12054);
writel(0x0000000a, regs + 0x22054);
writel(0x0000000a, regs + 0x1a054);
/* RC Sleep / RCx Thresholds */
setbits_le32(regs + 0xa0b0, 0x00000000);
setbits_le32(regs + 0xa0b4, 0x000003e8);
setbits_le32(regs + 0xa0b8, 0x0000c350);
/* RP Settings */
setbits_le32(regs + 0xa010, 0x000f4240);
setbits_le32(regs + 0xa014, 0x12060000);
setbits_le32(regs + 0xa02c, 0x0000e808);
setbits_le32(regs + 0xa030, 0x0003bd08);
setbits_le32(regs + 0xa068, 0x000101d0);
setbits_le32(regs + 0xa06c, 0x00055730);
setbits_le32(regs + 0xa070, 0x0000000a);
/* RP Control */
writel(0x00000b92, regs + 0xa024);
/* HW RC6 Control */
writel(0x88040000, regs + 0xa090);
/* Video Frequency Request */
writel(0x08000000, regs + 0xa00c);
/* Set RC6 VIDs */
ret = poll32(regs + 0x138124, (1 << 31), 0);
if (ret)
goto err;
writel(0, regs + 0x138128);
writel(0x80000004, regs + 0x138124);
ret = poll32(regs + 0x138124, (1 << 31), 0);
if (ret)
goto err;
/* Enable PM Interrupts */
writel(0x03000076, regs + 0x4402c);
/* Enable RC6 in idle */
writel(0x00040000, regs + 0xa094);
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
};
static int haswell_late_init(struct udevice *dev)
{
struct broadwell_igd_priv *priv = dev_get_priv(dev);
u8 *regs = priv->regs;
int ret;
/* Lock settings */
setbits_le32(regs + 0x0a248, (1 << 31));
setbits_le32(regs + 0x0a004, (1 << 4));
setbits_le32(regs + 0x0a080, (1 << 2));
setbits_le32(regs + 0x0a180, (1 << 31));
/* Disable Force Wake */
writel(0x00010000, regs + 0xa188);
ret = poll32(regs + 0x130044, 1, 0);
if (ret)
goto err;
writel(0x00000001, regs + 0xa188);
/* Enable power well for DP and Audio */
setbits_le32(regs + 0x45400, (1 << 31));
ret = poll32(regs + 0x45400, 1 << 30, 1 << 30);
if (ret)
goto err;
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
};
static int broadwell_early_init(struct udevice *dev)
{
struct broadwell_igd_priv *priv = dev_get_priv(dev);
u8 *regs = priv->regs;
int ret;
/* Enable Force Wake */
writel(0x00010001, regs + 0xa188);
ret = poll32(regs + 0x130044, 1, 1);
if (ret)
goto err;
/* Enable push bus metric control and shift */
writel(0x00000004, regs + 0xa248);
writel(0x000000ff, regs + 0xa250);
writel(0x00000010, regs + 0xa25c);
/* GFXPAUSE settings (set based on stepping) */
/* ECO Settings */
writel(0x45200000, regs + 0xa180);
/* Enable DOP Clock Gating */
writel(0x000000fd, regs + 0x9424);
/* Enable Unit Level Clock Gating */
writel(0x00000000, regs + 0x9400);
writel(0x40401000, regs + 0x9404);
writel(0x00000000, regs + 0x9408);
writel(0x02000001, regs + 0x940c);
writel(0x0000000a, regs + 0x1a054);
/* Video Frequency Request */
writel(0x08000000, regs + 0xa00c);
writel(0x00000009, regs + 0x138158);
writel(0x0000000d, regs + 0x13815c);
/*
* RC6 Settings
*/
/* Wake Rate Limits */
clrsetbits_le32(regs + 0x0a090, ~0, 0);
setbits_le32(regs + 0x0a098, 0x03e80000);
setbits_le32(regs + 0x0a09c, 0x00280000);
setbits_le32(regs + 0x0a0a8, 0x0001e848);
setbits_le32(regs + 0x0a0ac, 0x00000019);
/* Render/Video/Blitter Idle Max Count */
writel(0x0000000a, regs + 0x02054);
writel(0x0000000a, regs + 0x12054);
writel(0x0000000a, regs + 0x22054);
/* RC Sleep / RCx Thresholds */
setbits_le32(regs + 0x0a0b0, 0x00000000);
setbits_le32(regs + 0x0a0b8, 0x00000271);
/* RP Settings */
setbits_le32(regs + 0x0a010, 0x000f4240);
setbits_le32(regs + 0x0a014, 0x12060000);
setbits_le32(regs + 0x0a02c, 0x0000e808);
setbits_le32(regs + 0x0a030, 0x0003bd08);
setbits_le32(regs + 0x0a068, 0x000101d0);
setbits_le32(regs + 0x0a06c, 0x00055730);
setbits_le32(regs + 0x0a070, 0x0000000a);
setbits_le32(regs + 0x0a168, 0x00000006);
/* RP Control */
writel(0x00000b92, regs + 0xa024);
/* HW RC6 Control */
writel(0x90040000, regs + 0xa090);
/* Set RC6 VIDs */
ret = poll32(regs + 0x138124, (1 << 31), 0);
if (ret)
goto err;
writel(0, regs + 0x138128);
writel(0x80000004, regs + 0x138124);
ret = poll32(regs + 0x138124, (1 << 31), 0);
if (ret)
goto err;
/* Enable PM Interrupts */
writel(0x03000076, regs + 0x4402c);
/* Enable RC6 in idle */
writel(0x00040000, regs + 0xa094);
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
}
static int broadwell_late_init(struct udevice *dev)
{
struct broadwell_igd_priv *priv = dev_get_priv(dev);
u8 *regs = priv->regs;
int ret;
/* Lock settings */
setbits_le32(regs + 0x0a248, 1 << 31);
setbits_le32(regs + 0x0a000, 1 << 18);
setbits_le32(regs + 0x0a180, 1 << 31);
/* Disable Force Wake */
writel(0x00010000, regs + 0xa188);
ret = poll32(regs + 0x130044, 1, 0);
if (ret)
goto err;
/* Enable power well for DP and Audio */
setbits_le32(regs + 0x45400, 1 << 31);
ret = poll32(regs + 0x45400, 1 << 30, 1 << 30);
if (ret)
goto err;
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
};
static unsigned long gtt_read(struct broadwell_igd_priv *priv,
unsigned long reg)
{
return readl(priv->regs + reg);
}
static void gtt_write(struct broadwell_igd_priv *priv, unsigned long reg,
unsigned long data)
{
writel(data, priv->regs + reg);
}
static inline void gtt_clrsetbits(struct broadwell_igd_priv *priv, u32 reg,
u32 bic, u32 or)
{
clrsetbits_le32(priv->regs + reg, bic, or);
}
static int gtt_poll(struct broadwell_igd_priv *priv, u32 reg, u32 mask,
u32 value)
{
unsigned try = GT_RETRY;
u32 data;
while (try--) {
data = gtt_read(priv, reg);
if ((data & mask) == value)
return 0;
udelay(10);
}
debug("GT init timeout\n");
return -ETIMEDOUT;
}
static void igd_setup_panel(struct udevice *dev)
{
struct broadwell_igd_plat *plat = dev_get_platdata(dev);
struct broadwell_igd_priv *priv = dev_get_priv(dev);
u32 reg32;
/* Setup Digital Port Hotplug */
reg32 = (plat->dp_hotplug[0] & 0x7) << 2;
reg32 |= (plat->dp_hotplug[1] & 0x7) << 10;
reg32 |= (plat->dp_hotplug[2] & 0x7) << 18;
gtt_write(priv, PCH_PORT_HOTPLUG, reg32);
/* Setup Panel Power On Delays */
reg32 = (plat->port_select & 0x3) << 30;
reg32 |= (plat->power_up_delay & 0x1fff) << 16;
reg32 |= (plat->power_backlight_on_delay & 0x1fff);
gtt_write(priv, PCH_PP_ON_DELAYS, reg32);
/* Setup Panel Power Off Delays */
reg32 = (plat->power_down_delay & 0x1fff) << 16;
reg32 |= (plat->power_backlight_off_delay & 0x1fff);
gtt_write(priv, PCH_PP_OFF_DELAYS, reg32);
/* Setup Panel Power Cycle Delay */
if (plat->power_cycle_delay) {
reg32 = gtt_read(priv, PCH_PP_DIVISOR);
reg32 &= ~0xff;
reg32 |= plat->power_cycle_delay & 0xff;
gtt_write(priv, PCH_PP_DIVISOR, reg32);
}
/* Enable Backlight if needed */
if (plat->cpu_backlight) {
gtt_write(priv, BLC_PWM_CPU_CTL2, BLC_PWM2_ENABLE);
gtt_write(priv, BLC_PWM_CPU_CTL, plat->cpu_backlight);
}
if (plat->pch_backlight) {
gtt_write(priv, BLC_PWM_PCH_CTL1, BLM_PCH_PWM_ENABLE);
gtt_write(priv, BLC_PWM_PCH_CTL2, plat->pch_backlight);
}
}
static int igd_cdclk_init_haswell(struct udevice *dev)
{
struct broadwell_igd_plat *plat = dev_get_platdata(dev);
struct broadwell_igd_priv *priv = dev_get_priv(dev);
int cdclk = plat->cdclk;
u16 devid;
int gpu_is_ulx = 0;
u32 dpdiv, lpcll;
int ret;
dm_pci_read_config16(dev, PCI_DEVICE_ID, &devid);
/* Check for ULX GT1 or GT2 */
if (devid == 0x0a0e || devid == 0x0a1e)
gpu_is_ulx = 1;
/* 675MHz is not supported on haswell */
if (cdclk == GT_CDCLK_675)
cdclk = GT_CDCLK_337;
/* If CD clock is fixed or ULT then set to 450MHz */
if ((gtt_read(priv, 0x42014) & 0x1000000) || cpu_is_ult())
cdclk = GT_CDCLK_450;
/* 540MHz is not supported on ULX */
if (gpu_is_ulx && cdclk == GT_CDCLK_540)
cdclk = GT_CDCLK_337;
/* 337.5MHz is not supported on non-ULT/ULX */
if (!gpu_is_ulx && !cpu_is_ult() && cdclk == GT_CDCLK_337)
cdclk = GT_CDCLK_450;
/* Set variables based on CD Clock setting */
switch (cdclk) {
case GT_CDCLK_337:
dpdiv = 169;
lpcll = (1 << 26);
break;
case GT_CDCLK_450:
dpdiv = 225;
lpcll = 0;
break;
case GT_CDCLK_540:
dpdiv = 270;
lpcll = (1 << 26);
break;
default:
ret = -EDOM;
goto err;
}
/* Set LPCLL_CTL CD Clock Frequency Select */
gtt_clrsetbits(priv, 0x130040, ~0xf3ffffff, lpcll);
/* ULX: Inform power controller of selected frequency */
if (gpu_is_ulx) {
if (cdclk == GT_CDCLK_450)
gtt_write(priv, 0x138128, 0x00000000); /* 450MHz */
else
gtt_write(priv, 0x138128, 0x00000001); /* 337.5MHz */
gtt_write(priv, 0x13812c, 0x00000000);
gtt_write(priv, 0x138124, 0x80000017);
}
/* Set CPU DP AUX 2X bit clock dividers */
gtt_clrsetbits(priv, 0x64010, ~0xfffff800, dpdiv);
gtt_clrsetbits(priv, 0x64810, ~0xfffff800, dpdiv);
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
}
static int igd_cdclk_init_broadwell(struct udevice *dev)
{
struct broadwell_igd_plat *plat = dev_get_platdata(dev);
struct broadwell_igd_priv *priv = dev_get_priv(dev);
int cdclk = plat->cdclk;
u32 dpdiv, lpcll, pwctl, cdset;
int ret;
/* Inform power controller of upcoming frequency change */
gtt_write(priv, 0x138128, 0);
gtt_write(priv, 0x13812c, 0);
gtt_write(priv, 0x138124, 0x80000018);
/* Poll GT driver mailbox for run/busy clear */
if (gtt_poll(priv, 0x138124, 1 << 31, 0 << 31))
cdclk = GT_CDCLK_450;
if (gtt_read(priv, 0x42014) & 0x1000000) {
/* If CD clock is fixed then set to 450MHz */
cdclk = GT_CDCLK_450;
} else {
/* Program CD clock to highest supported freq */
if (cpu_is_ult())
cdclk = GT_CDCLK_540;
else
cdclk = GT_CDCLK_675;
}
/* CD clock frequency 675MHz not supported on ULT */
if (cpu_is_ult() && cdclk == GT_CDCLK_675)
cdclk = GT_CDCLK_540;
/* Set variables based on CD Clock setting */
switch (cdclk) {
case GT_CDCLK_337:
cdset = 337;
lpcll = (1 << 27);
pwctl = 2;
dpdiv = 169;
break;
case GT_CDCLK_450:
cdset = 449;
lpcll = 0;
pwctl = 0;
dpdiv = 225;
break;
case GT_CDCLK_540:
cdset = 539;
lpcll = (1 << 26);
pwctl = 1;
dpdiv = 270;
break;
case GT_CDCLK_675:
cdset = 674;
lpcll = (1 << 26) | (1 << 27);
pwctl = 3;
dpdiv = 338;
break;
default:
ret = -EDOM;
goto err;
}
debug("%s: frequency = %d\n", __func__, cdclk);
/* Set LPCLL_CTL CD Clock Frequency Select */
gtt_clrsetbits(priv, 0x130040, ~0xf3ffffff, lpcll);
/* Inform power controller of selected frequency */
gtt_write(priv, 0x138128, pwctl);
gtt_write(priv, 0x13812c, 0);
gtt_write(priv, 0x138124, 0x80000017);
/* Program CD Clock Frequency */
gtt_clrsetbits(priv, 0x46200, ~0xfffffc00, cdset);
/* Set CPU DP AUX 2X bit clock dividers */
gtt_clrsetbits(priv, 0x64010, ~0xfffff800, dpdiv);
gtt_clrsetbits(priv, 0x64810, ~0xfffff800, dpdiv);
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
}
u8 systemagent_revision(struct udevice *bus)
{
ulong val;
pci_bus_read_config(bus, PCI_BDF(0, 0, 0), PCI_REVISION_ID, &val,
PCI_SIZE_32);
return val;
}
static int igd_pre_init(struct udevice *dev, bool is_broadwell)
{
struct broadwell_igd_plat *plat = dev_get_platdata(dev);
struct broadwell_igd_priv *priv = dev_get_priv(dev);
u32 rp1_gfx_freq;
int ret;
mdelay(plat->pre_graphics_delay);
/* Early init steps */
if (is_broadwell) {
ret = broadwell_early_init(dev);
if (ret)
goto err;
/* Set GFXPAUSE based on stepping */
if (cpu_get_stepping() <= (CPUID_BROADWELL_E0 & 0xf) &&
systemagent_revision(pci_get_controller(dev)) <= 9) {
gtt_write(priv, 0xa000, 0x300ff);
} else {
gtt_write(priv, 0xa000, 0x30020);
}
} else {
ret = haswell_early_init(dev);
if (ret)
goto err;
}
/* Set RP1 graphics frequency */
rp1_gfx_freq = (readl(MCHBAR_REG(0x5998)) >> 8) & 0xff;
gtt_write(priv, 0xa008, rp1_gfx_freq << 24);
/* Post VBIOS panel setup */
igd_setup_panel(dev);
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
}
static int igd_post_init(struct udevice *dev, bool is_broadwell)
{
int ret;
/* Late init steps */
if (is_broadwell) {
ret = igd_cdclk_init_broadwell(dev);
if (ret)
return ret;
ret = broadwell_late_init(dev);
if (ret)
return ret;
} else {
igd_cdclk_init_haswell(dev);
ret = haswell_late_init(dev);
if (ret)
return ret;
}
return 0;
}
static int broadwell_igd_int15_handler(void)
{
int res = 0;
debug("%s: INT15 function %04x!\n", __func__, M.x86.R_AX);
switch (M.x86.R_AX) {
case 0x5f35:
/*
* Boot Display Device Hook:
* bit 0 = CRT
* bit 1 = TV (eDP)
* bit 2 = EFP
* bit 3 = LFP
* bit 4 = CRT2
* bit 5 = TV2 (eDP)
* bit 6 = EFP2
* bit 7 = LFP2
*/
M.x86.R_AX = 0x005f;
M.x86.R_CX = 0x0000; /* Use video bios default */
res = 1;
break;
default:
debug("Unknown INT15 function %04x!\n", M.x86.R_AX);
break;
}
return res;
}
static int broadwell_igd_probe(struct udevice *dev)
{
struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
bool is_broadwell;
int ret;
if (!ll_boot_init()) {
/*
* If we are running from EFI or coreboot, this driver can't
* work.
*/
printf("Not available (previous bootloader prevents it)\n");
return -EPERM;
}
is_broadwell = cpu_get_family_model() == BROADWELL_FAMILY_ULT;
bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
debug("%s: is_broadwell=%d\n", __func__, is_broadwell);
ret = igd_pre_init(dev, is_broadwell);
if (!ret) {
ret = vbe_setup_video(dev, broadwell_igd_int15_handler);
if (ret)
debug("failed to run video BIOS: %d\n", ret);
}
if (!ret)
ret = igd_post_init(dev, is_broadwell);
bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
if (ret)
return ret;
/* Use write-combining for the graphics memory, 256MB */
ret = mtrr_add_request(MTRR_TYPE_WRCOMB, plat->base, 256 << 20);
if (!ret)
ret = mtrr_commit(true);
if (ret && ret != -ENOSYS) {
printf("Failed to add MTRR: Display will be slow (err %d)\n",
ret);
}
debug("fb=%lx, size %x, display size=%d %d %d\n", plat->base,
plat->size, uc_priv->xsize, uc_priv->ysize, uc_priv->bpix);
return 0;
}
static int broadwell_igd_ofdata_to_platdata(struct udevice *dev)
{
struct broadwell_igd_plat *plat = dev_get_platdata(dev);
struct broadwell_igd_priv *priv = dev_get_priv(dev);
int node = dev->of_offset;
const void *blob = gd->fdt_blob;
if (fdtdec_get_int_array(blob, node, "intel,dp-hotplug",
plat->dp_hotplug,
ARRAY_SIZE(plat->dp_hotplug)))
return -EINVAL;
plat->port_select = fdtdec_get_int(blob, node, "intel,port-select", 0);
plat->power_cycle_delay = fdtdec_get_int(blob, node,
"intel,power-cycle-delay", 0);
plat->power_up_delay = fdtdec_get_int(blob, node,
"intel,power-up-delay", 0);
plat->power_down_delay = fdtdec_get_int(blob, node,
"intel,power-down-delay", 0);
plat->power_backlight_on_delay = fdtdec_get_int(blob, node,
"intel,power-backlight-on-delay", 0);
plat->power_backlight_off_delay = fdtdec_get_int(blob, node,
"intel,power-backlight-off-delay", 0);
plat->cpu_backlight = fdtdec_get_int(blob, node,
"intel,cpu-backlight", 0);
plat->pch_backlight = fdtdec_get_int(blob, node,
"intel,pch-backlight", 0);
plat->pre_graphics_delay = fdtdec_get_int(blob, node,
"intel,pre-graphics-delay", 0);
priv->regs = (u8 *)dm_pci_read_bar32(dev, 0);
debug("%s: regs at %p\n", __func__, priv->regs);
debug("dp_hotplug %d %d %d\n", plat->dp_hotplug[0], plat->dp_hotplug[1],
plat->dp_hotplug[2]);
debug("port_select = %d\n", plat->port_select);
debug("power_up_delay = %d\n", plat->power_up_delay);
debug("power_backlight_on_delay = %d\n",
plat->power_backlight_on_delay);
debug("power_down_delay = %d\n", plat->power_down_delay);
debug("power_backlight_off_delay = %d\n",
plat->power_backlight_off_delay);
debug("power_cycle_delay = %d\n", plat->power_cycle_delay);
debug("cpu_backlight = %x\n", plat->cpu_backlight);
debug("pch_backlight = %x\n", plat->pch_backlight);
debug("cdclk = %d\n", plat->cdclk);
debug("pre_graphics_delay = %d\n", plat->pre_graphics_delay);
return 0;
}
static const struct video_ops broadwell_igd_ops = {
};
static const struct udevice_id broadwell_igd_ids[] = {
{ .compatible = "intel,broadwell-igd" },
{ }
};
U_BOOT_DRIVER(broadwell_igd) = {
.name = "broadwell_igd",
.id = UCLASS_VIDEO,
.of_match = broadwell_igd_ids,
.ops = &broadwell_igd_ops,
.ofdata_to_platdata = broadwell_igd_ofdata_to_platdata,
.probe = broadwell_igd_probe,
.priv_auto_alloc_size = sizeof(struct broadwell_igd_priv),
.platdata_auto_alloc_size = sizeof(struct broadwell_igd_plat),
};