x230: Deploy VBT

Change-Id: Ide31a56bfdbc31cd3b87993dfb4ed8ef0107cdba
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5396
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)

3 files changed, 816 insertions, 0 deletions

diff --git a/src/drivers/intel/gma/intel_bios.h b/src/drivers/intel/gma/intel_bios.h
new file mode 100644
index 0000000000..36426d81f9
--- /dev/null
+++ b/src/drivers/intel/gma/intel_bios.h
@@ -0,0 +1,733 @@
+/*
+ * Copyright © 2006 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#ifndef _I830_BIOS_H_
+#define _I830_BIOS_H_
+
+struct vbt_header {
+	u8 signature[20];		/**< Always starts with 'VBT$' */
+	u16 version;			/**< decimal */
+	u16 header_size;		/**< in bytes */
+	u16 vbt_size;			/**< in bytes */
+	u8 vbt_checksum;
+	u8 reserved0;
+	u32 bdb_offset;			/**< from beginning of VBT */
+	u32 aim_offset[4];		/**< from beginning of VBT */
+} __attribute__((packed));
+
+struct bdb_header {
+	u8 signature[16];		/**< Always 'BIOS_DATA_BLOCK' */
+	u16 version;			/**< decimal */
+	u16 header_size;		/**< in bytes */
+	u16 bdb_size;			/**< in bytes */
+};
+
+/* strictly speaking, this is a "skip" block, but it has interesting info */
+struct vbios_data {
+	u8 type; /* 0 == desktop, 1 == mobile */
+	u8 relstage;
+	u8 chipset;
+	u8 lvds_present:1;
+	u8 tv_present:1;
+	u8 rsvd2:6; /* finish byte */
+	u8 rsvd3[4];
+	u8 signon[155];
+	u8 copyright[61];
+	u16 code_segment;
+	u8 dos_boot_mode;
+	u8 bandwidth_percent;
+	u8 rsvd4; /* popup memory size */
+	u8 resize_pci_bios;
+	u8 rsvd5; /* is crt already on ddc2 */
+} __attribute__((packed));
+
+/*
+ * There are several types of BIOS data blocks (BDBs), each block has
+ * an ID and size in the first 3 bytes (ID in first, size in next 2).
+ * Known types are listed below.
+ */
+#define BDB_GENERAL_FEATURES	  1
+#define BDB_GENERAL_DEFINITIONS	  2
+#define BDB_OLD_TOGGLE_LIST	  3
+#define BDB_MODE_SUPPORT_LIST	  4
+#define BDB_GENERIC_MODE_TABLE	  5
+#define BDB_EXT_MMIO_REGS	  6
+#define BDB_SWF_IO		  7
+#define BDB_SWF_MMIO		  8
+#define BDB_DOT_CLOCK_TABLE	  9
+#define BDB_MODE_REMOVAL_TABLE	 10
+#define BDB_CHILD_DEVICE_TABLE	 11
+#define BDB_DRIVER_FEATURES	 12
+#define BDB_DRIVER_PERSISTENCE	 13
+#define BDB_EXT_TABLE_PTRS	 14
+#define BDB_DOT_CLOCK_OVERRIDE	 15
+#define BDB_DISPLAY_SELECT	 16
+/* 17 rsvd */
+#define BDB_DRIVER_ROTATION	 18
+#define BDB_DISPLAY_REMOVE	 19
+#define BDB_OEM_CUSTOM		 20
+#define BDB_EFP_LIST		 21 /* workarounds for VGA hsync/vsync */
+#define BDB_SDVO_LVDS_OPTIONS	 22
+#define BDB_SDVO_PANEL_DTDS	 23
+#define BDB_SDVO_LVDS_PNP_IDS	 24
+#define BDB_SDVO_LVDS_POWER_SEQ	 25
+#define BDB_TV_OPTIONS		 26
+#define BDB_EDP			 27
+#define BDB_LVDS_OPTIONS	 40
+#define BDB_LVDS_LFP_DATA_PTRS	 41
+#define BDB_LVDS_LFP_DATA	 42
+#define BDB_LVDS_BACKLIGHT	 43
+#define BDB_LVDS_POWER		 44
+#define BDB_MIPI		 50
+#define BDB_SKIP		254 /* VBIOS private block, ignore */
+
+struct bdb_general_features {
+        /* bits 1 */
+	u8 panel_fitting:2;
+	u8 flexaim:1;
+	u8 msg_enable:1;
+	u8 clear_screen:3;
+	u8 color_flip:1;
+
+        /* bits 2 */
+	u8 download_ext_vbt:1;
+	u8 enable_ssc:1;
+	u8 ssc_freq:1;
+	u8 enable_lfp_on_override:1;
+	u8 disable_ssc_ddt:1;
+	u8 rsvd7:1;
+	u8 display_clock_mode:1;
+	u8 rsvd8:1; /* finish byte */
+
+        /* bits 3 */
+	u8 disable_smooth_vision:1;
+	u8 single_dvi:1;
+	u8 rsvd9:1;
+	u8 fdi_rx_polarity_inverted:1;
+	u8 rsvd10:4; /* finish byte */
+
+        /* bits 4 */
+	u8 legacy_monitor_detect;
+
+        /* bits 5 */
+	u8 int_crt_support:1;
+	u8 int_tv_support:1;
+	u8 int_efp_support:1;
+	u8 dp_ssc_enb:1;	/* PCH attached eDP supports SSC */
+	u8 dp_ssc_freq:1;	/* SSC freq for PCH attached eDP */
+	u8 rsvd11:3; /* finish byte */
+} __attribute__((packed));
+
+/* pre-915 */
+#define GPIO_PIN_DVI_LVDS	0x03 /* "DVI/LVDS DDC GPIO pins" */
+#define GPIO_PIN_ADD_I2C	0x05 /* "ADDCARD I2C GPIO pins" */
+#define GPIO_PIN_ADD_DDC	0x04 /* "ADDCARD DDC GPIO pins" */
+#define GPIO_PIN_ADD_DDC_I2C	0x06 /* "ADDCARD DDC/I2C GPIO pins" */
+
+/* Pre 915 */
+#define DEVICE_TYPE_NONE	0x00
+#define DEVICE_TYPE_CRT		0x01
+#define DEVICE_TYPE_TV		0x09
+#define DEVICE_TYPE_EFP		0x12
+#define DEVICE_TYPE_LFP		0x22
+/* On 915+ */
+#define DEVICE_TYPE_CRT_DPMS		0x6001
+#define DEVICE_TYPE_CRT_DPMS_HOTPLUG	0x4001
+#define DEVICE_TYPE_TV_COMPOSITE	0x0209
+#define DEVICE_TYPE_TV_MACROVISION	0x0289
+#define DEVICE_TYPE_TV_RF_COMPOSITE	0x020c
+#define DEVICE_TYPE_TV_SVIDEO_COMPOSITE	0x0609
+#define DEVICE_TYPE_TV_SCART		0x0209
+#define DEVICE_TYPE_TV_CODEC_HOTPLUG_PWR 0x6009
+#define DEVICE_TYPE_EFP_HOTPLUG_PWR	0x6012
+#define DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR	0x6052
+#define DEVICE_TYPE_EFP_DVI_I		0x6053
+#define DEVICE_TYPE_EFP_DVI_D_DUAL	0x6152
+#define DEVICE_TYPE_EFP_DVI_D_HDCP	0x60d2
+#define DEVICE_TYPE_OPENLDI_HOTPLUG_PWR	0x6062
+#define DEVICE_TYPE_OPENLDI_DUALPIX	0x6162
+#define DEVICE_TYPE_LFP_PANELLINK	0x5012
+#define DEVICE_TYPE_LFP_CMOS_PWR	0x5042
+#define DEVICE_TYPE_LFP_LVDS_PWR	0x5062
+#define DEVICE_TYPE_LFP_LVDS_DUAL	0x5162
+#define DEVICE_TYPE_LFP_LVDS_DUAL_HDCP	0x51e2
+
+#define DEVICE_CFG_NONE		0x00
+#define DEVICE_CFG_12BIT_DVOB	0x01
+#define DEVICE_CFG_12BIT_DVOC	0x02
+#define DEVICE_CFG_24BIT_DVOBC	0x09
+#define DEVICE_CFG_24BIT_DVOCB	0x0a
+#define DEVICE_CFG_DUAL_DVOB	0x11
+#define DEVICE_CFG_DUAL_DVOC	0x12
+#define DEVICE_CFG_DUAL_DVOBC	0x13
+#define DEVICE_CFG_DUAL_LINK_DVOBC	0x19
+#define DEVICE_CFG_DUAL_LINK_DVOCB	0x1a
+
+#define DEVICE_WIRE_NONE	0x00
+#define DEVICE_WIRE_DVOB	0x01
+#define DEVICE_WIRE_DVOC	0x02
+#define DEVICE_WIRE_DVOBC	0x03
+#define DEVICE_WIRE_DVOBB	0x05
+#define DEVICE_WIRE_DVOCC	0x06
+#define DEVICE_WIRE_DVOB_MASTER 0x0d
+#define DEVICE_WIRE_DVOC_MASTER 0x0e
+
+#define DEVICE_PORT_DVOA	0x00 /* none on 845+ */
+#define DEVICE_PORT_DVOB	0x01
+#define DEVICE_PORT_DVOC	0x02
+
+/* We used to keep this struct but without any version control. We should avoid
+ * using it in the future, but it should be safe to keep using it in the old
+ * code. */
+struct old_child_dev_config {
+	u16 handle;
+	u16 device_type;
+	u8  device_id[10]; /* ascii string */
+	u16 addin_offset;
+	u8  dvo_port; /* See Device_PORT_* above */
+	u8  i2c_pin;
+	u8  slave_addr;
+	u8  ddc_pin;
+	u16 edid_ptr;
+	u8  dvo_cfg; /* See DEVICE_CFG_* above */
+	u8  dvo2_port;
+	u8  i2c2_pin;
+	u8  slave2_addr;
+	u8  ddc2_pin;
+	u8  capabilities;
+	u8  dvo_wiring;/* See DEVICE_WIRE_* above */
+	u8  dvo2_wiring;
+	u16 extended_type;
+	u8  dvo_function;
+} __attribute__((packed));
+
+/* This one contains field offsets that are known to be common for all BDB
+ * versions. Notice that the meaning of the contents contents may still change,
+ * but at least the offsets are consistent. */
+struct common_child_dev_config {
+	u16 handle;
+	u16 device_type;
+	u8 not_common1[12];
+	u8 dvo_port;
+	u8 not_common2[2];
+	u8 ddc_pin;
+	u16 edid_ptr;
+} __attribute__((packed));
+
+/* This field changes depending on the BDB version, so the most reliable way to
+ * read it is by checking the BDB version and reading the raw pointer. */
+union child_device_config {
+	/* This one is safe to be used anywhere, but the code should still check
+	 * the BDB version. */
+	u8 raw[33];
+	/* This one should only be kept for legacy code. */
+	struct old_child_dev_config old;
+	/* This one should also be safe to use anywhere, even without version
+	 * checks. */
+	struct common_child_dev_config common;
+};
+
+struct bdb_general_definitions {
+	/* DDC GPIO */
+	u8 crt_ddc_gmbus_pin;
+
+	/* DPMS bits */
+	u8 dpms_acpi:1;
+	u8 skip_boot_crt_detect:1;
+	u8 dpms_aim:1;
+	u8 rsvd1:5; /* finish byte */
+
+	/* boot device bits */
+	u8 boot_display[2];
+	u8 child_dev_size;
+
+	/*
+	 * Device info:
+	 * If TV is present, it'll be at devices[0].
+	 * LVDS will be next, either devices[0] or [1], if present.
+	 * On some platforms the number of device is 6. But could be as few as
+	 * 4 if both TV and LVDS are missing.
+	 * And the device num is related with the size of general definition
+	 * block. It is obtained by using the following formula:
+	 * number = (block_size - sizeof(bdb_general_definitions))/
+	 *	     sizeof(child_device_config);
+	 */
+	union child_device_config devices[0];
+} __attribute__((packed));
+
+struct bdb_lvds_options {
+	u8 panel_type;
+	u8 rsvd1;
+	/* LVDS capabilities, stored in a dword */
+	u8 pfit_mode:2;
+	u8 pfit_text_mode_enhanced:1;
+	u8 pfit_gfx_mode_enhanced:1;
+	u8 pfit_ratio_auto:1;
+	u8 pixel_dither:1;
+	u8 lvds_edid:1;
+	u8 rsvd2:1;
+	u8 rsvd4;
+} __attribute__((packed));
+
+/* LFP pointer table contains entries to the struct below */
+struct bdb_lvds_lfp_data_ptr {
+	u16 fp_timing_offset; /* offsets are from start of bdb */
+	u8 fp_table_size;
+	u16 dvo_timing_offset;
+	u8 dvo_table_size;
+	u16 panel_pnp_id_offset;
+	u8 pnp_table_size;
+} __attribute__((packed));
+
+struct bdb_lvds_lfp_data_ptrs {
+	u8 lvds_entries; /* followed by one or more lvds_data_ptr structs */
+	struct bdb_lvds_lfp_data_ptr ptr[16];
+} __attribute__((packed));
+
+/* LFP data has 3 blocks per entry */
+struct lvds_fp_timing {
+	u16 x_res;
+	u16 y_res;
+	u32 lvds_reg;
+	u32 lvds_reg_val;
+	u32 pp_on_reg;
+	u32 pp_on_reg_val;
+	u32 pp_off_reg;
+	u32 pp_off_reg_val;
+	u32 pp_cycle_reg;
+	u32 pp_cycle_reg_val;
+	u32 pfit_reg;
+	u32 pfit_reg_val;
+	u16 terminator;
+} __attribute__((packed));
+
+struct lvds_dvo_timing {
+	u16 clock;		/**< In 10khz */
+	u8 hactive_lo;
+	u8 hblank_lo;
+	u8 hblank_hi:4;
+	u8 hactive_hi:4;
+	u8 vactive_lo;
+	u8 vblank_lo;
+	u8 vblank_hi:4;
+	u8 vactive_hi:4;
+	u8 hsync_off_lo;
+	u8 hsync_pulse_width;
+	u8 vsync_pulse_width:4;
+	u8 vsync_off:4;
+	u8 rsvd0:6;
+	u8 hsync_off_hi:2;
+	u8 h_image;
+	u8 v_image;
+	u8 max_hv;
+	u8 h_border;
+	u8 v_border;
+	u8 rsvd1:3;
+	u8 digital:2;
+	u8 vsync_positive:1;
+	u8 hsync_positive:1;
+	u8 rsvd2:1;
+} __attribute__((packed));
+
+struct lvds_pnp_id {
+	u16 mfg_name;
+	u16 product_code;
+	u32 serial;
+	u8 mfg_week;
+	u8 mfg_year;
+} __attribute__((packed));
+
+struct bdb_lvds_lfp_data_entry {
+	struct lvds_fp_timing fp_timing;
+	struct lvds_dvo_timing dvo_timing;
+	struct lvds_pnp_id pnp_id;
+} __attribute__((packed));
+
+struct bdb_lvds_lfp_data {
+	struct bdb_lvds_lfp_data_entry data[16];
+} __attribute__((packed));
+
+struct aimdb_header {
+	char signature[16];
+	char oem_device[20];
+	u16 aimdb_version;
+	u16 aimdb_header_size;
+	u16 aimdb_size;
+} __attribute__((packed));
+
+struct aimdb_block {
+	u8 aimdb_id;
+	u16 aimdb_size;
+} __attribute__((packed));
+
+struct vch_panel_data {
+	u16 fp_timing_offset;
+	u8 fp_timing_size;
+	u16 dvo_timing_offset;
+	u8 dvo_timing_size;
+	u16 text_fitting_offset;
+	u8 text_fitting_size;
+	u16 graphics_fitting_offset;
+	u8 graphics_fitting_size;
+} __attribute__((packed));
+
+struct vch_bdb_22 {
+	struct aimdb_block aimdb_block;
+	struct vch_panel_data panels[16];
+} __attribute__((packed));
+
+struct bdb_sdvo_lvds_options {
+	u8 panel_backlight;
+	u8 h40_set_panel_type;
+	u8 panel_type;
+	u8 ssc_clk_freq;
+	u16 als_low_trip;
+	u16 als_high_trip;
+	u8 sclalarcoeff_tab_row_num;
+	u8 sclalarcoeff_tab_row_size;
+	u8 coefficient[8];
+	u8 panel_misc_bits_1;
+	u8 panel_misc_bits_2;
+	u8 panel_misc_bits_3;
+	u8 panel_misc_bits_4;
+} __attribute__((packed));
+
+
+#define BDB_DRIVER_FEATURE_NO_LVDS		0
+#define BDB_DRIVER_FEATURE_INT_LVDS		1
+#define BDB_DRIVER_FEATURE_SDVO_LVDS		2
+#define BDB_DRIVER_FEATURE_EDP			3
+
+struct bdb_driver_features {
+	u8 boot_dev_algorithm:1;
+	u8 block_display_switch:1;
+	u8 allow_display_switch:1;
+	u8 hotplug_dvo:1;
+	u8 dual_view_zoom:1;
+	u8 int15h_hook:1;
+	u8 sprite_in_clone:1;
+	u8 primary_lfp_id:1;
+
+	u16 boot_mode_x;
+	u16 boot_mode_y;
+	u8 boot_mode_bpp;
+	u8 boot_mode_refresh;
+
+	u16 enable_lfp_primary:1;
+	u16 selective_mode_pruning:1;
+	u16 dual_frequency:1;
+	u16 render_clock_freq:1; /* 0: high freq; 1: low freq */
+	u16 nt_clone_support:1;
+	u16 power_scheme_ui:1; /* 0: CUI; 1: 3rd party */
+	u16 sprite_display_assign:1; /* 0: secondary; 1: primary */
+	u16 cui_aspect_scaling:1;
+	u16 preserve_aspect_ratio:1;
+	u16 sdvo_device_power_down:1;
+	u16 crt_hotplug:1;
+	u16 lvds_config:2;
+	u16 tv_hotplug:1;
+	u16 hdmi_config:2;
+
+	u8 static_display:1;
+	u8 reserved2:7;
+	u16 legacy_crt_max_x;
+	u16 legacy_crt_max_y;
+	u8 legacy_crt_max_refresh;
+
+	u8 hdmi_termination;
+	u8 custom_vbt_version;
+} __attribute__((packed));
+
+#define EDP_18BPP	0
+#define EDP_24BPP	1
+#define EDP_30BPP	2
+#define EDP_RATE_1_62	0
+#define EDP_RATE_2_7	1
+#define EDP_LANE_1	0
+#define EDP_LANE_2	1
+#define EDP_LANE_4	3
+#define EDP_PREEMPHASIS_NONE	0
+#define EDP_PREEMPHASIS_3_5dB	1
+#define EDP_PREEMPHASIS_6dB	2
+#define EDP_PREEMPHASIS_9_5dB	3
+#define EDP_VSWING_0_4V		0
+#define EDP_VSWING_0_6V		1
+#define EDP_VSWING_0_8V		2
+#define EDP_VSWING_1_2V		3
+
+struct edp_power_seq {
+	u16 t1_t3;
+	u16 t8;
+	u16 t9;
+	u16 t10;
+	u16 t11_t12;
+} __attribute__ ((packed));
+
+struct edp_link_params {
+	u8 rate:4;
+	u8 lanes:4;
+	u8 preemphasis:4;
+	u8 vswing:4;
+} __attribute__ ((packed));
+
+struct bdb_edp {
+	struct edp_power_seq power_seqs[16];
+	u32 color_depth;
+	struct edp_link_params link_params[16];
+	u32 sdrrs_msa_timing_delay;
+
+	/* ith bit indicates enabled/disabled for (i+1)th panel */
+	u16 edp_s3d_feature;
+	u16 edp_t3_optimization;
+} __attribute__ ((packed));
+
+/*
+ * Driver<->VBIOS interaction occurs through scratch bits in
+ * GR18 & SWF*.
+ */
+
+/* GR18 bits are set on display switch and hotkey events */
+#define GR18_DRIVER_SWITCH_EN	(1<<7) /* 0: VBIOS control, 1: driver control */
+#define GR18_HOTKEY_MASK	0x78 /* See also SWF4 15:0 */
+#define   GR18_HK_NONE		(0x0<<3)
+#define   GR18_HK_LFP_STRETCH	(0x1<<3)
+#define   GR18_HK_TOGGLE_DISP	(0x2<<3)
+#define   GR18_HK_DISP_SWITCH	(0x4<<3) /* see SWF14 15:0 for what to enable */
+#define   GR18_HK_POPUP_DISABLED (0x6<<3)
+#define   GR18_HK_POPUP_ENABLED	(0x7<<3)
+#define   GR18_HK_PFIT		(0x8<<3)
+#define   GR18_HK_APM_CHANGE	(0xa<<3)
+#define   GR18_HK_MULTIPLE	(0xc<<3)
+#define GR18_USER_INT_EN	(1<<2)
+#define GR18_A0000_FLUSH_EN	(1<<1)
+#define GR18_SMM_EN		(1<<0)
+
+/* Set by driver, cleared by VBIOS */
+#define SWF00_YRES_SHIFT	16
+#define SWF00_XRES_SHIFT	0
+#define SWF00_RES_MASK		0xffff
+
+/* Set by VBIOS at boot time and driver at runtime */
+#define SWF01_TV2_FORMAT_SHIFT	8
+#define SWF01_TV1_FORMAT_SHIFT	0
+#define SWF01_TV_FORMAT_MASK	0xffff
+
+#define SWF10_VBIOS_BLC_I2C_EN	(1<<29)
+#define SWF10_GTT_OVERRIDE_EN	(1<<28)
+#define SWF10_LFP_DPMS_OVR	(1<<27) /* override DPMS on display switch */
+#define SWF10_ACTIVE_TOGGLE_LIST_MASK (7<<24)
+#define   SWF10_OLD_TOGGLE	0x0
+#define   SWF10_TOGGLE_LIST_1	0x1
+#define   SWF10_TOGGLE_LIST_2	0x2
+#define   SWF10_TOGGLE_LIST_3	0x3
+#define   SWF10_TOGGLE_LIST_4	0x4
+#define SWF10_PANNING_EN	(1<<23)
+#define SWF10_DRIVER_LOADED	(1<<22)
+#define SWF10_EXTENDED_DESKTOP	(1<<21)
+#define SWF10_EXCLUSIVE_MODE	(1<<20)
+#define SWF10_OVERLAY_EN	(1<<19)
+#define SWF10_PLANEB_HOLDOFF	(1<<18)
+#define SWF10_PLANEA_HOLDOFF	(1<<17)
+#define SWF10_VGA_HOLDOFF	(1<<16)
+#define SWF10_ACTIVE_DISP_MASK	0xffff
+#define   SWF10_PIPEB_LFP2	(1<<15)
+#define   SWF10_PIPEB_EFP2	(1<<14)
+#define   SWF10_PIPEB_TV2	(1<<13)
+#define   SWF10_PIPEB_CRT2	(1<<12)
+#define   SWF10_PIPEB_LFP	(1<<11)
+#define   SWF10_PIPEB_EFP	(1<<10)
+#define   SWF10_PIPEB_TV	(1<<9)
+#define   SWF10_PIPEB_CRT	(1<<8)
+#define   SWF10_PIPEA_LFP2	(1<<7)
+#define   SWF10_PIPEA_EFP2	(1<<6)
+#define   SWF10_PIPEA_TV2	(1<<5)
+#define   SWF10_PIPEA_CRT2	(1<<4)
+#define   SWF10_PIPEA_LFP	(1<<3)
+#define   SWF10_PIPEA_EFP	(1<<2)
+#define   SWF10_PIPEA_TV	(1<<1)
+#define   SWF10_PIPEA_CRT	(1<<0)
+
+#define SWF11_MEMORY_SIZE_SHIFT	16
+#define SWF11_SV_TEST_EN	(1<<15)
+#define SWF11_IS_AGP		(1<<14)
+#define SWF11_DISPLAY_HOLDOFF	(1<<13)
+#define SWF11_DPMS_REDUCED	(1<<12)
+#define SWF11_IS_VBE_MODE	(1<<11)
+#define SWF11_PIPEB_ACCESS	(1<<10) /* 0 here means pipe a */
+#define SWF11_DPMS_MASK		0x07
+#define   SWF11_DPMS_OFF	(1<<2)
+#define   SWF11_DPMS_SUSPEND	(1<<1)
+#define   SWF11_DPMS_STANDBY	(1<<0)
+#define   SWF11_DPMS_ON		0
+
+#define SWF14_GFX_PFIT_EN	(1<<31)
+#define SWF14_TEXT_PFIT_EN	(1<<30)
+#define SWF14_LID_STATUS_CLOSED	(1<<29) /* 0 here means open */
+#define SWF14_POPUP_EN		(1<<28)
+#define SWF14_DISPLAY_HOLDOFF	(1<<27)
+#define SWF14_DISP_DETECT_EN	(1<<26)
+#define SWF14_DOCKING_STATUS_DOCKED (1<<25) /* 0 here means undocked */
+#define SWF14_DRIVER_STATUS	(1<<24)
+#define SWF14_OS_TYPE_WIN9X	(1<<23)
+#define SWF14_OS_TYPE_WINNT	(1<<22)
+/* 21:19 rsvd */
+#define SWF14_PM_TYPE_MASK	0x00070000
+#define   SWF14_PM_ACPI_VIDEO	(0x4 << 16)
+#define   SWF14_PM_ACPI		(0x3 << 16)
+#define   SWF14_PM_APM_12	(0x2 << 16)
+#define   SWF14_PM_APM_11	(0x1 << 16)
+#define SWF14_HK_REQUEST_MASK	0x0000ffff /* see GR18 6:3 for event type */
+          /* if GR18 indicates a display switch */
+#define   SWF14_DS_PIPEB_LFP2_EN (1<<15)
+#define   SWF14_DS_PIPEB_EFP2_EN (1<<14)
+#define   SWF14_DS_PIPEB_TV2_EN  (1<<13)
+#define   SWF14_DS_PIPEB_CRT2_EN (1<<12)
+#define   SWF14_DS_PIPEB_LFP_EN  (1<<11)
+#define   SWF14_DS_PIPEB_EFP_EN  (1<<10)
+#define   SWF14_DS_PIPEB_TV_EN   (1<<9)
+#define   SWF14_DS_PIPEB_CRT_EN  (1<<8)
+#define   SWF14_DS_PIPEA_LFP2_EN (1<<7)
+#define   SWF14_DS_PIPEA_EFP2_EN (1<<6)
+#define   SWF14_DS_PIPEA_TV2_EN  (1<<5)
+#define   SWF14_DS_PIPEA_CRT2_EN (1<<4)
+#define   SWF14_DS_PIPEA_LFP_EN  (1<<3)
+#define   SWF14_DS_PIPEA_EFP_EN  (1<<2)
+#define   SWF14_DS_PIPEA_TV_EN   (1<<1)
+#define   SWF14_DS_PIPEA_CRT_EN  (1<<0)
+          /* if GR18 indicates a panel fitting request */
+#define   SWF14_PFIT_EN		(1<<0) /* 0 means disable */
+          /* if GR18 indicates an APM change request */
+#define   SWF14_APM_HIBERNATE	0x4
+#define   SWF14_APM_SUSPEND	0x3
+#define   SWF14_APM_STANDBY	0x1
+#define   SWF14_APM_RESTORE	0x0
+
+/* Add the device class for LFP, TV, HDMI */
+#define	 DEVICE_TYPE_INT_LFP	0x1022
+#define	 DEVICE_TYPE_INT_TV	0x1009
+#define	 DEVICE_TYPE_HDMI	0x60D2
+#define	 DEVICE_TYPE_DP		0x68C6
+#define	 DEVICE_TYPE_eDP	0x78C6
+
+#define  DEVICE_TYPE_CLASS_EXTENSION	(1 << 15)
+#define  DEVICE_TYPE_POWER_MANAGEMENT	(1 << 14)
+#define  DEVICE_TYPE_HOTPLUG_SIGNALING	(1 << 13)
+#define  DEVICE_TYPE_INTERNAL_CONNECTOR	(1 << 12)
+#define  DEVICE_TYPE_NOT_HDMI_OUTPUT	(1 << 11)
+#define  DEVICE_TYPE_MIPI_OUTPUT	(1 << 10)
+#define  DEVICE_TYPE_COMPOSITE_OUTPUT	(1 << 9)
+#define  DEVICE_TYPE_DUAL_CHANNEL	(1 << 8)
+#define  DEVICE_TYPE_HIGH_SPEED_LINK	(1 << 6)
+#define  DEVICE_TYPE_LVDS_SINGALING	(1 << 5)
+#define  DEVICE_TYPE_TMDS_DVI_SIGNALING	(1 << 4)
+#define  DEVICE_TYPE_VIDEO_SIGNALING	(1 << 3)
+#define  DEVICE_TYPE_DISPLAYPORT_OUTPUT	(1 << 2)
+#define  DEVICE_TYPE_DIGITAL_OUTPUT	(1 << 1)
+#define  DEVICE_TYPE_ANALOG_OUTPUT	(1 << 0)
+
+/*
+ * Bits we care about when checking for DEVICE_TYPE_eDP
+ * Depending on the system, the other bits may or may not
+ * be set for eDP outputs.
+ */
+#define DEVICE_TYPE_eDP_BITS \
+	(DEVICE_TYPE_INTERNAL_CONNECTOR | \
+	 DEVICE_TYPE_NOT_HDMI_OUTPUT | \
+	 DEVICE_TYPE_MIPI_OUTPUT | \
+	 DEVICE_TYPE_COMPOSITE_OUTPUT | \
+	 DEVICE_TYPE_DUAL_CHANNEL | \
+	 DEVICE_TYPE_LVDS_SINGALING | \
+	 DEVICE_TYPE_TMDS_DVI_SIGNALING | \
+	 DEVICE_TYPE_VIDEO_SIGNALING | \
+	 DEVICE_TYPE_DISPLAYPORT_OUTPUT | \
+	 DEVICE_TYPE_DIGITAL_OUTPUT | \
+	 DEVICE_TYPE_ANALOG_OUTPUT)
+
+/* define the DVO port for HDMI output type */
+#define		DVO_B		1
+#define		DVO_C		2
+#define		DVO_D		3
+
+/* define the PORT for DP output type */
+#define		PORT_IDPB	7
+#define		PORT_IDPC	8
+#define		PORT_IDPD	9
+
+/* Possible values for the "DVO Port" field for versions >= 155: */
+#define DVO_PORT_HDMIA	0
+#define DVO_PORT_HDMIB	1
+#define DVO_PORT_HDMIC	2
+#define DVO_PORT_HDMID	3
+#define DVO_PORT_LVDS	4
+#define DVO_PORT_TV	5
+#define DVO_PORT_CRT	6
+#define DVO_PORT_DPB	7
+#define DVO_PORT_DPC	8
+#define DVO_PORT_DPD	9
+#define DVO_PORT_DPA	10
+
+/* MIPI DSI panel info */
+struct bdb_mipi {
+	u16 panel_id;
+	u16 bridge_revision;
+
+	/* General params */
+	u32 dithering:1;
+	u32 bpp_pixel_format:1;
+	u32 rsvd1:1;
+	u32 dphy_valid:1;
+	u32 resvd2:28;
+
+	u16 port_info;
+	u16 rsvd3:2;
+	u16 num_lanes:2;
+	u16 rsvd4:12;
+
+	/* DSI config */
+	u16 virt_ch_num:2;
+	u16 vtm:2;
+	u16 rsvd5:12;
+
+	u32 dsi_clock;
+	u32 bridge_ref_clk;
+	u16 rsvd_pwr;
+
+	/* Dphy Params */
+	u32 prepare_cnt:5;
+	u32 rsvd6:3;
+	u32 clk_zero_cnt:8;
+	u32 trail_cnt:5;
+	u32 rsvd7:3;
+	u32 exit_zero_cnt:6;
+	u32 rsvd8:2;
+
+	u32 hl_switch_cnt;
+	u32 lp_byte_clk;
+	u32 clk_lane_switch_cnt;
+} __attribute__((packed));
+
+#endif /* _I830_BIOS_H_ */
diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c
index d271a1afcb..a01fe9f771 100644
--- a/src/northbridge/intel/sandybridge/gma.c
+++ b/src/northbridge/intel/sandybridge/gma.c
@@ -21,6 +21,7 @@
 #include <console/console.h>
 #include <bootmode.h>
 #include <delay.h>
+#include <string.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
diff --git a/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c b/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c
index 1f53a74b5f..ff877ffcb6 100644
--- a/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c
+++ b/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c
@@ -26,13 +26,64 @@
 
 #include <drivers/intel/gma/edid.h>
 #include <drivers/intel/gma/i915.h>
+#include <drivers/intel/gma/intel_bios.h>
 #include "gma.h"
 #include "chip.h"
 #include <pc80/vga.h>
 #include <pc80/vga_io.h>
+#include <device/pci_def.h>
+#include <device/pci_rom.h>
 
 #if IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT)
 
+static size_t generate_vbt(const struct northbridge_intel_sandybridge_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 SNB/IVB-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;
+}
+
 static void link_train(u32 mmio)
 {
 	write32(mmio+0xf000c,0x40);
@@ -509,6 +560,37 @@ int i915lightup(const struct northbridge_intel_sandybridge_config *info,
 	memset ((void *) lfb, 0, edid.x_resolution * edid.y_resolution * 4);
 	set_vbe_mode_info_valid(&edid, lfb);
 #endif
+
+	/* Linux relies on VBT for panel info.  */
+	optionrom_header_t *oh = (void *)PCI_VGA_RAM_IMAGE_START;
+	optionrom_pcir_t *pcir;
+	size_t vbt_size;
+	size_t fake_oprom_size;
+	struct device *dev;
+
+	dev = dev_find_slot(0, PCI_DEVFN(2, 0));
+
+	memset(oh, 0, 8192);
+
+	oh->signature = OPROM_SIGNATURE;
+	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 (info, (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;
 	return 1;
 }