intel/gm45: native gfx init.

Tested on lenovo X200 in both text and gfx mode.

Change-Id: I273971d0f34ca3529959d4228e9516775459b806
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6682
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
This commit is contained in:
Vladimir Serbinenko 2014-08-16 03:35:33 +02:00
parent 905e6f2b56
commit 880101121e
5 changed files with 532 additions and 1 deletions

View File

@ -17,6 +17,8 @@ config BOARD_SPECIFIC_OPTIONS # dummy
select HAVE_OPTION_TABLE select HAVE_OPTION_TABLE
select HAVE_CMOS_DEFAULT select HAVE_CMOS_DEFAULT
select HAVE_ACPI_RESUME select HAVE_ACPI_RESUME
select MAINBOARD_HAS_NATIVE_VGA_INIT
select MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG
config MAINBOARD_DIR config MAINBOARD_DIR
string string

View File

@ -1,4 +1,10 @@
chip northbridge/intel/gm45 chip northbridge/intel/gm45
register "gpu_use_spread_spectrum_clock" = "1"
register "gpu_lvds_dual_channel" = "0"
register "gpu_link_frequency_270_mhz" = "1"
register "gpu_lvds_num_lanes" = "4"
device cpu_cluster 0 on device cpu_cluster 0 on
chip cpu/intel/socket_BGA956 chip cpu/intel/socket_BGA956
device lapic 0 on end device lapic 0 on end

View File

@ -29,6 +29,8 @@ config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
select MMCONF_SUPPORT_DEFAULT select MMCONF_SUPPORT_DEFAULT
select DYNAMIC_CBMEM select DYNAMIC_CBMEM
select IOMMU select IOMMU
select VGA
select INTEL_EDID
config BOOTBLOCK_NORTHBRIDGE_INIT config BOOTBLOCK_NORTHBRIDGE_INIT
string string

View File

@ -22,6 +22,10 @@
#define NORTHBRIDGE_INTEL_GM45_CHIP_H #define NORTHBRIDGE_INTEL_GM45_CHIP_H
struct northbridge_intel_gm45_config { struct northbridge_intel_gm45_config {
int gpu_use_spread_spectrum_clock;
int gpu_lvds_dual_channel;
int gpu_link_frequency_270_mhz;
int gpu_lvds_num_lanes;
}; };
#endif /* NORTHBRIDGE_INTEL_GM45_CHIP_H */ #endif /* NORTHBRIDGE_INTEL_GM45_CHIP_H */

View File

@ -28,18 +28,485 @@
#include <device/pci_ops.h> #include <device/pci_ops.h>
#include <cpu/x86/msr.h> #include <cpu/x86/msr.h>
#include <cpu/x86/mtrr.h> #include <cpu/x86/mtrr.h>
#include <kconfig.h>
#include "drivers/intel/gma/i915_reg.h" #include "drivers/intel/gma/i915_reg.h"
#include "chip.h" #include "chip.h"
#include "gm45.h" #include "gm45.h"
#include <drivers/intel/gma/intel_bios.h>
#include <drivers/intel/gma/edid.h>
#include <drivers/intel/gma/i915.h>
#include <pc80/vga.h>
#include <pc80/vga_io.h>
typedef struct {
u16 signature;
u8 size;
u8 reserved[21];
u16 pcir_offset;
u16 vbt_offset;
} __attribute__((packed)) optionrom_header_t;
#define OPROM_SIGNATURE 0xaa55
typedef struct {
u32 signature;
u16 vendor;
u16 device;
u16 reserved1;
u16 length;
u8 revision;
u8 classcode[3];
u16 imagelength;
u16 coderevision;
u8 codetype;
u8 indicator;
u16 reserved2;
} __attribute__((packed)) optionrom_pcir_t;
static struct resource *gtt_res = NULL; static struct resource *gtt_res = NULL;
static inline void gtt_write(u32 reg, u32 data) void gtt_write(u32 reg, u32 data)
{ {
write32(gtt_res->base + reg, data); write32(gtt_res->base + reg, data);
} }
#if IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT)
static void power_port(u32 mmio)
{
read32(mmio + 0x00061100); // = 0x00000000
write32(mmio + 0x00061100, 0x00000000);
write32(mmio + 0x00061100, 0x00010000);
read32(mmio + 0x00061100); // = 0x00010000
read32(mmio + 0x00061100); // = 0x00010000
read32(mmio + 0x00061100); // = 0x00000000
write32(mmio + 0x00061100, 0x00000000);
read32(mmio + 0x00061100); // = 0x00000000
read32(mmio + 0x00064200); // = 0x0000001c
write32(mmio + 0x00064210, 0x8004003e);
write32(mmio + 0x00064214, 0x80060002);
write32(mmio + 0x00064218, 0x01000000);
read32(mmio + 0x00064210); // = 0x5144003e
write32(mmio + 0x00064210, 0x5344003e);
read32(mmio + 0x00064210); // = 0x0144003e
write32(mmio + 0x00064210, 0x8074003e);
read32(mmio + 0x00064210); // = 0x5144003e
read32(mmio + 0x00064210); // = 0x5144003e
write32(mmio + 0x00064210, 0x5344003e);
read32(mmio + 0x00064210); // = 0x0144003e
write32(mmio + 0x00064210, 0x8074003e);
read32(mmio + 0x00064210); // = 0x5144003e
read32(mmio + 0x00064210); // = 0x5144003e
write32(mmio + 0x00064210, 0x5344003e);
read32(mmio + 0x00064210); // = 0x0144003e
write32(mmio + 0x00064210, 0x8074003e);
read32(mmio + 0x00064210); // = 0x5144003e
read32(mmio + 0x00064210); // = 0x5144003e
write32(mmio + 0x00064210, 0x5344003e);
write32(mmio + 0x00064f00, 0x0100030c);
write32(mmio + 0x00064f04, 0x00b8230c);
write32(mmio + 0x00064f08, 0x06f8930c);
write32(mmio + 0x00064f0c, 0x09f8e38e);
write32(mmio + 0x00064f10, 0x00b8030c);
write32(mmio + 0x00064f14, 0x0b78830c);
write32(mmio + 0x00064f18, 0x0ff8d3cf);
write32(mmio + 0x00064f1c, 0x01e8030c);
write32(mmio + 0x00064f20, 0x0ff863cf);
write32(mmio + 0x00064f24, 0x0ff803cf);
write32(mmio + 0x000c4030, 0x00001000);
read32(mmio + 0x00044000); // = 0x00000000
write32(mmio + 0x00044030, 0x00001000);
read32(mmio + 0x00061150); // = 0x0000001c
write32(mmio + 0x00061150, 0x0000089c);
write32(mmio + 0x000fcc00, 0x01986f00);
write32(mmio + 0x000fcc0c, 0x01986f00);
write32(mmio + 0x000fcc18, 0x01986f00);
write32(mmio + 0x000fcc24, 0x01986f00);
read32(mmio + 0x00044000); // = 0x00000000
read32(mmio + LVDS); // = 0x40000002
}
static void intel_gma_init(const struct northbridge_intel_gm45_config *info,
u32 mmio, u32 physbase, u16 piobase, u32 lfb)
{
int i;
u8 edid_data[128];
struct edid edid;
u32 hactive, vactive, right_border, bottom_border;
int hpolarity, vpolarity;
u32 vsync, hsync, vblank, hblank, hfront_porch, vfront_porch;
u32 candp1, candn;
u32 best_delta = 0xffffffff;
u32 target_frequency;
u32 pixel_p1 = 1;
u32 pixel_n = 1;
u32 pixel_m1 = 1;
u32 pixel_m2 = 1;
u32 link_frequency = info->gpu_link_frequency_270_mhz ? 270000 : 162000;
u32 data_m1;
u32 data_n1 = 0x00800000;
u32 link_m1;
u32 link_n1 = 0x00080000;
vga_gr_write(0x18, 0);
/* Setup GTT. */
for (i = 0; i < 0x2000; i++)
{
outl((i << 2) | 1, piobase);
outl(physbase + (i << 12) + 1, piobase + 4);
}
write32(mmio + 0x61100, 0x40008c18);
write32(mmio + 0x7041c, 0x0);
write32(mmio + 0x6020, 0x3);
vga_misc_write(0x67);
const u8 cr[] = { 0x5f, 0x4f, 0x50, 0x82, 0x55, 0x81, 0xbf, 0x1f,
0x00, 0x4f, 0x0d, 0x0e, 0x00, 0x00, 0x00, 0x00,
0x9c, 0x8e, 0x8f, 0x28, 0x1f, 0x96, 0xb9, 0xa3,
0xff
};
vga_cr_write(0x11, 0);
for (i = 0; i <= 0x18; i++)
vga_cr_write(i, cr[i]);
power_port(mmio);
intel_gmbus_read_edid(mmio + GMBUS0, 3, 0x50, edid_data, 128);
decode_edid(edid_data,
sizeof(edid_data), &edid);
/* Disable screen memory to prevent garbage from appearing. */
vga_sr_write(1, vga_sr_read(1) | 0x20);
hactive = edid.x_resolution;
vactive = edid.y_resolution;
right_border = edid.hborder;
bottom_border = edid.vborder;
hpolarity = (edid.phsync == '-');
vpolarity = (edid.pvsync == '-');
vsync = edid.vspw;
hsync = edid.hspw;
vblank = edid.vbl;
hblank = edid.hbl;
hfront_porch = edid.hso;
vfront_porch = edid.vso;
target_frequency = info->gpu_lvds_dual_channel ? edid.pixel_clock
: (2 * edid.pixel_clock);
#if !IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
vga_textmode_init();
#else
vga_sr_write(1, 1);
vga_sr_write(0x2, 0xf);
vga_sr_write(0x3, 0x0);
vga_sr_write(0x4, 0xe);
vga_gr_write(0, 0x0);
vga_gr_write(1, 0x0);
vga_gr_write(2, 0x0);
vga_gr_write(3, 0x0);
vga_gr_write(4, 0x0);
vga_gr_write(5, 0x0);
vga_gr_write(6, 0x5);
vga_gr_write(7, 0xf);
vga_gr_write(0x10, 0x1);
vga_gr_write(0x11, 0);
edid.bytes_per_line = (edid.bytes_per_line + 63) & ~63;
write32(mmio + DSPCNTR(0), DISPPLANE_BGRX888);
write32(mmio + DSPADDR(0), 0);
write32(mmio + DSPSTRIDE(0), edid.bytes_per_line);
write32(mmio + DSPSURF(0), 0);
for (i = 0; i < 0x100; i++)
write32(mmio + LGC_PALETTE(0) + 4 * i, i * 0x010101);
#endif
/* Find suitable divisors. */
for (candp1 = 1; candp1 <= 8; candp1++) {
for (candn = 5; candn <= 10; candn++) {
u32 cur_frequency;
u32 m; /* 77 - 131. */
u32 denom; /* 35 - 560. */
u32 current_delta;
denom = candn * candp1 * 7;
/* Doesnt overflow for up to
5000000 kHz = 5 GHz. */
m = (target_frequency * denom + 60000) / 120000;
if (m < 77 || m > 131)
continue;
cur_frequency = (120000 * m) / denom;
if (target_frequency > cur_frequency)
current_delta = target_frequency - cur_frequency;
else
current_delta = cur_frequency - target_frequency;
if (best_delta > current_delta) {
best_delta = current_delta;
pixel_n = candn;
pixel_p1 = candp1;
pixel_m2 = ((m + 3) % 5) + 7;
pixel_m1 = (m - pixel_m2) / 5;
}
}
}
if (best_delta == 0xffffffff) {
printk (BIOS_ERR, "Couldn't find GFX clock divisors\n");
return;
}
link_m1 = ((uint64_t)link_n1 * edid.pixel_clock) / link_frequency;
data_m1 = ((uint64_t)data_n1 * 18 * edid.pixel_clock)
/ (link_frequency * 8 * (info->gpu_lvds_num_lanes ? : 4));
printk(BIOS_INFO, "bringing up panel at resolution %d x %d\n",
hactive, vactive);
printk(BIOS_DEBUG, "Borders %d x %d\n",
right_border, bottom_border);
printk(BIOS_DEBUG, "Blank %d x %d\n",
hblank, vblank);
printk(BIOS_DEBUG, "Sync %d x %d\n",
hsync, vsync);
printk(BIOS_DEBUG, "Front porch %d x %d\n",
hfront_porch, vfront_porch);
printk(BIOS_DEBUG, (info->gpu_use_spread_spectrum_clock
? "Spread spectrum clock\n" : "DREF clock\n"));
printk(BIOS_DEBUG,
info->gpu_lvds_dual_channel ? "Dual channel\n" : "Single channel\n");
printk(BIOS_DEBUG, "Polarities %d, %d\n",
hpolarity, vpolarity);
printk(BIOS_DEBUG, "Data M1=%d, N1=%d\n",
data_m1, data_n1);
printk(BIOS_DEBUG, "Link frequency %d kHz\n",
link_frequency);
printk(BIOS_DEBUG, "Link M1=%d, N1=%d\n",
link_m1, link_n1);
printk(BIOS_DEBUG, "Pixel N=%d, M1=%d, M2=%d, P1=%d\n",
pixel_n, pixel_m1, pixel_m2, pixel_p1);
printk(BIOS_DEBUG, "Pixel clock %d kHz\n",
120000 * (5 * pixel_m1 + pixel_m2) / pixel_n
/ (pixel_p1 * 7));
write32(mmio + LVDS,
(hpolarity << 20) | (vpolarity << 21)
| (info->gpu_lvds_dual_channel ? LVDS_CLOCK_B_POWERUP_ALL
| LVDS_CLOCK_BOTH_POWERUP_ALL : 0)
| LVDS_BORDER_ENABLE | LVDS_CLOCK_A_POWERUP_ALL);
mdelay(1);
write32(mmio + PP_CONTROL, PANEL_UNLOCK_REGS
| (read32(mmio + PP_CONTROL) & ~PANEL_UNLOCK_MASK));
write32(mmio + FP0(0),
((pixel_n - 2) << 16)
| ((pixel_m1 - 2) << 8) | pixel_m2);
write32(mmio + DPLL(0),
DPLL_VCO_ENABLE | DPLLB_MODE_LVDS
| (info->gpu_lvds_dual_channel ? DPLLB_LVDS_P2_CLOCK_DIV_7
: DPLLB_LVDS_P2_CLOCK_DIV_14)
| (0x10000 << (pixel_p1 - 1))
| ((info->gpu_use_spread_spectrum_clock ? 3 : 0) << 13)
| (0x1 << (pixel_p1 - 1)));
mdelay(1);
write32(mmio + DPLL(0),
DPLL_VCO_ENABLE | DPLLB_MODE_LVDS
| (info->gpu_lvds_dual_channel ? DPLLB_LVDS_P2_CLOCK_DIV_7
: DPLLB_LVDS_P2_CLOCK_DIV_14)
| (0x10000 << (pixel_p1 - 1))
| ((info->gpu_use_spread_spectrum_clock ? 3 : 0) << 13)
| (0x1 << (pixel_p1 - 1)));
/* Re-lock the registers. */
write32(mmio + PP_CONTROL,
(read32(mmio + PP_CONTROL) & ~PANEL_UNLOCK_MASK));
write32(mmio + LVDS,
(hpolarity << 20) | (vpolarity << 21)
| (info->gpu_lvds_dual_channel ? LVDS_CLOCK_B_POWERUP_ALL
| LVDS_CLOCK_BOTH_POWERUP_ALL : 0)
| LVDS_BORDER_ENABLE | LVDS_CLOCK_A_POWERUP_ALL);
write32(mmio + HTOTAL(0),
((hactive + right_border + hblank - 1) << 16)
| (hactive - 1));
write32(mmio + HBLANK(0),
((hactive + right_border + hblank - 1) << 16)
| (hactive + right_border - 1));
write32(mmio + HSYNC(0),
((hactive + right_border + hfront_porch + hsync - 1) << 16)
| (hactive + right_border + hfront_porch - 1));
write32(mmio + VTOTAL(0), ((vactive + bottom_border + vblank - 1) << 16)
| (vactive - 1));
write32(mmio + VBLANK(0), ((vactive + bottom_border + vblank - 1) << 16)
| (vactive + bottom_border - 1));
write32(mmio + VSYNC(0),
(vactive + bottom_border + vfront_porch + vsync - 1)
| (vactive + bottom_border + vfront_porch - 1));
write32(mmio + PIPECONF(0), PIPECONF_DISABLE);
write32(mmio + PF_WIN_POS(0), 0);
#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
write32(mmio + PIPESRC(0), ((hactive - 1) << 16) | (vactive - 1));
write32(mmio + PF_CTL(0),0);
write32(mmio + PF_WIN_SZ(0), 0);
write32(mmio + PFIT_CONTROL, 0x20000000);
#else
write32(mmio + PIPESRC(0), (639 << 16) | 399);
write32(mmio + PF_CTL(0),PF_ENABLE | PF_FILTER_MED_3x3);
write32(mmio + PF_WIN_SZ(0), vactive | (hactive << 16));
write32(mmio + PFIT_CONTROL, 0xa0000000);
#endif
mdelay(1);
write32(mmio + PIPE_DATA_M1(0), 0x7e000000 | data_m1);
write32(mmio + PIPE_DATA_N1(0), data_n1);
write32(mmio + PIPE_LINK_M1(0), link_m1);
write32(mmio + PIPE_LINK_N1(0), link_n1);
write32(mmio + 0x000f000c, 0x00002040);
mdelay(1);
write32(mmio + 0x000f000c, 0x00002050);
write32(mmio + 0x00060100, 0x00044000);
mdelay(1);
write32(mmio + PIPECONF(0), PIPECONF_BPP_6);
write32(mmio + 0x000f0008, 0x00000040);
write32(mmio + 0x000f000c, 0x00022050);
write32(mmio + PIPECONF(0), PIPECONF_BPP_6 | PIPECONF_DITHER_EN);
write32(mmio + PIPECONF(0), PIPECONF_ENABLE | PIPECONF_BPP_6 | PIPECONF_DITHER_EN);
#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
write32(mmio + VGACNTRL, 0x22c4008e | VGA_DISP_DISABLE);
write32(mmio + DSPCNTR(0), DISPLAY_PLANE_ENABLE | DISPPLANE_BGRX888);
mdelay(1);
#else
write32(mmio + VGACNTRL, 0x22c4008e);
#endif
write32(mmio + TRANS_HTOTAL(0),
((hactive + right_border + hblank - 1) << 16)
| (hactive - 1));
write32(mmio + TRANS_HBLANK(0),
((hactive + right_border + hblank - 1) << 16)
| (hactive + right_border - 1));
write32(mmio + TRANS_HSYNC(0),
((hactive + right_border + hfront_porch + hsync - 1) << 16)
| (hactive + right_border + hfront_porch - 1));
write32(mmio + TRANS_VTOTAL(0),
((vactive + bottom_border + vblank - 1) << 16)
| (vactive - 1));
write32(mmio + TRANS_VBLANK(0),
((vactive + bottom_border + vblank - 1) << 16)
| (vactive + bottom_border - 1));
write32(mmio + TRANS_VSYNC(0),
(vactive + bottom_border + vfront_porch + vsync - 1)
| (vactive + bottom_border + vfront_porch - 1));
write32(mmio + 0x00060100, 0xb01c4000);
write32(mmio + 0x000f000c, 0xb01a2050);
mdelay(1);
write32(mmio + TRANSCONF(0), TRANS_ENABLE | TRANS_6BPC
#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
| TRANS_STATE_MASK
#endif
);
write32(mmio + LVDS,
LVDS_PORT_ENABLE
| (hpolarity << 20) | (vpolarity << 21)
| (info->gpu_lvds_dual_channel ? LVDS_CLOCK_B_POWERUP_ALL
| LVDS_CLOCK_BOTH_POWERUP_ALL : 0)
| LVDS_BORDER_ENABLE | LVDS_CLOCK_A_POWERUP_ALL);
write32(mmio + PP_CONTROL, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
write32(mmio + PP_CONTROL, PANEL_UNLOCK_REGS | PANEL_POWER_RESET);
mdelay(1);
write32(mmio + PP_CONTROL, PANEL_UNLOCK_REGS
| PANEL_POWER_ON | PANEL_POWER_RESET);
printk (BIOS_DEBUG, "waiting for panel powerup\n");
while (1) {
u32 reg32;
reg32 = read32(mmio + PP_STATUS);
if (((reg32 >> 28) & 3) == 0)
break;
}
printk (BIOS_DEBUG, "panel powered up\n");
write32(mmio + PP_CONTROL, PANEL_POWER_ON | PANEL_POWER_RESET);
/* Enable screen memory. */
vga_sr_write(1, vga_sr_read(1) & ~0x20);
/* Clear interrupts. */
write32(mmio + DEIIR, 0xffffffff);
write32(mmio + SDEIIR, 0xffffffff);
#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
memset ((void *) lfb, 0, edid.x_resolution * edid.y_resolution * 4);
set_vbe_mode_info_valid(&edid, lfb);
#endif
}
static size_t generate_vbt(const struct northbridge_intel_gm45_config *conf,
void *vbt)
{
struct vbt_header *head = vbt;
struct bdb_header *bdb_head;
struct bdb_general_features *genfeat;
u8 *ptr;
memset (head, 0, sizeof (*head));
memcpy (head->signature, "$VBT IRONLAKE-MOBILE", 20);
head->version = 100;
head->header_size = sizeof (*head);
head->bdb_offset = sizeof (*head);
bdb_head = (struct bdb_header *) (head + 1);
memset (bdb_head, 0, sizeof (*bdb_head));
memcpy (bdb_head->signature, "BIOS_DATA_BLOCK ", 16);
bdb_head->version = 0xa8;
bdb_head->header_size = sizeof (*bdb_head);
ptr = (u8 *) (bdb_head + 1);
ptr[0] = BDB_GENERAL_FEATURES;
ptr[1] = sizeof (*genfeat);
ptr[2] = sizeof (*genfeat) >> 8;
ptr += 3;
genfeat = (struct bdb_general_features *) ptr;
memset (genfeat, 0, sizeof (*genfeat));
genfeat->panel_fitting = 3;
genfeat->flexaim = 1;
genfeat->download_ext_vbt = 1;
genfeat->enable_ssc = conf->gpu_use_spread_spectrum_clock;
genfeat->ssc_freq = !conf->gpu_link_frequency_270_mhz;
genfeat->rsvd10 = 0x4;
genfeat->legacy_monitor_detect = 1;
genfeat->int_crt_support = 1;
genfeat->dp_ssc_enb = 1;
ptr += sizeof (*genfeat);
bdb_head->bdb_size = ptr - (u8 *)bdb_head;
head->vbt_size = ptr - (u8 *)head;
head->vbt_checksum = 0;
return ptr - (u8 *)head;
}
#endif
static void gma_func0_init(struct device *dev) static void gma_func0_init(struct device *dev)
{ {
u32 reg32; u32 reg32;
@ -52,8 +519,58 @@ static void gma_func0_init(struct device *dev)
/* Init graphics power management */ /* Init graphics power management */
gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0); gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
#if !CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT
/* PCI Init, will run VBIOS */ /* PCI Init, will run VBIOS */
pci_dev_init(dev); pci_dev_init(dev);
#else
u32 physbase;
struct northbridge_intel_gm45_config *conf = dev->chip_info;
struct resource *lfb_res;
struct resource *pio_res;
lfb_res = find_resource(dev, PCI_BASE_ADDRESS_2);
pio_res = find_resource(dev, PCI_BASE_ADDRESS_4);
physbase = pci_read_config32(dev, 0x5c) & ~0xf;
if (gtt_res && gtt_res->base && physbase && pio_res && pio_res->base
&& lfb_res && lfb_res->base) {
printk(BIOS_SPEW, "Initializing VGA without OPROM. MMIO 0x%llx\n",
gtt_res->base);
intel_gma_init(conf, gtt_res->base, physbase, pio_res->base,
lfb_res->base);
}
/* Linux relies on VBT for panel info. */
if (read16(PCI_VGA_RAM_IMAGE_START) != PCI_ROM_HDR) {
optionrom_header_t *oh = (void *)PCI_VGA_RAM_IMAGE_START;
optionrom_pcir_t *pcir;
size_t vbt_size;
size_t fake_oprom_size;
memset(oh, 0, 8192);
oh->signature = PCI_ROM_HDR;
oh->pcir_offset = 0x40;
oh->vbt_offset = 0x80;
pcir = (void *)(PCI_VGA_RAM_IMAGE_START + 0x40);
pcir->signature = 0x52494350; // PCIR
pcir->vendor = dev->vendor;
pcir->device = dev->device;
pcir->length = sizeof(*pcir);
pcir->revision = dev->class;
pcir->classcode[0] = dev->class >> 8;
pcir->classcode[1] = dev->class >> 16;
pcir->classcode[2] = dev->class >> 24;
pcir->indicator = 0x80;
vbt_size = generate_vbt (conf, (void *)(PCI_VGA_RAM_IMAGE_START + 0x80));
fake_oprom_size = (0x80 + vbt_size + 511) / 512;
oh->size = fake_oprom_size;
pcir->imagelength = fake_oprom_size;
}
#endif
/* Post VBIOS init */ /* Post VBIOS init */
/* Enable Backlight */ /* Enable Backlight */