drivers/gpu/drm/i915/display/intel_vbt_defs.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/i915/display/intel_vbt_defs.h

Extension

.h

Size

40068 bytes

Lines

1673

Domain

Driver Families

Bucket

drivers/gpu

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• intel_dsi_vbt_defs.h

Detected Declarations

• struct bdb_edid_pnp_id
• struct bdb_edid_product_name
• struct bdb_edid_dtd
• struct vbt_header
• struct bdb_header
• struct bdb_general_features
• struct child_device_config
• struct bdb_general_definitions
• struct bdb_display_toggle
• struct bdb_mode_support_list
• struct generic_mode_table
• struct generic_mode_timings
• struct generic_mode_timings_alm
• struct bdb_generic_mode_table_alm
• struct bdb_generic_mode_table_mgm
• struct bdb_reg_table
• struct dot_clock_override_entry_gen2
• struct bdb_dot_clock_override_alm
• struct psr_table
• struct bdb_psr
• struct mode_removal_table
• struct bdb_mode_removal
• struct bdb_driver_features
• struct bdb_driver_persistence
• struct dot_clock_override_entry_gen3
• struct bdb_dot_clock_override
• struct toggle_list_entry_old
• struct toggle_list_table_old
• struct bdb_display_select_old
• struct bdb_sv_test_functions
• struct bdb_driver_rotation
• struct display_remove_entry_old
• struct bdb_display_remove_old
• struct oem_mode
• struct bdb_oem_custom
• struct efp_entry
• struct bdb_efp_list
• struct bdb_sdvo_lvds_options
• struct bdb_sdvo_lvds_dtd
• struct bdb_sdvo_lvds_pnp_id
• struct sdvo_lvds_pps
• struct bdb_sdvo_lvds_pps
• struct bdb_tv_options
• struct edp_power_seq
• struct edp_fast_link_params
• struct edp_pwm_delays
• struct edp_full_link_params
• struct edp_apical_params

Annotated Snippet

struct bdb_edid_pnp_id {
	u16 mfg_name;
	u16 product_code;
	u32 serial;
	u8 mfg_week;
	u8 mfg_year;
} __packed;

struct bdb_edid_product_name {
	char name[13];
} __packed;

struct bdb_edid_dtd {
	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_lo;
	u8 vsync_pulse_width_lo:4;
	u8 vsync_off_lo:4;
	u8 vsync_pulse_width_hi:2;
	u8 vsync_off_hi:2;
	u8 hsync_pulse_width_hi:2;
	u8 hsync_off_hi:2;
	u8 himage_lo;
	u8 vimage_lo;
	u8 vimage_hi:4;
	u8 himage_hi:4;
	u8 h_border;
	u8 v_border;
	u8 rsvd1:3;
	u8 digital:2;
	u8 vsync_positive:1;
	u8 hsync_positive:1;
	u8 non_interlaced:1;
} __packed;

/**
 * struct vbt_header - VBT Header structure
 * @signature:		VBT signature, always starts with "$VBT"
 * @version:		Version of this structure
 * @header_size:	Size of this structure
 * @vbt_size:		Size of VBT (VBT Header, BDB Header and data blocks)
 * @vbt_checksum:	Checksum
 * @reserved0:		Reserved
 * @bdb_offset:		Offset of &struct bdb_header from beginning of VBT
 * @aim_offset:		Offsets of add-in data blocks from beginning of VBT
 */
struct vbt_header {
	u8 signature[20];
	u16 version;
	u16 header_size;
	u16 vbt_size;
	u8 vbt_checksum;
	u8 reserved0;
	u32 bdb_offset;
	u32 aim_offset[4];
} __packed;

/**
 * struct bdb_header - BDB Header structure
 * @signature:		BDB signature "BIOS_DATA_BLOCK"
 * @version:		Version of the data block definitions
 * @header_size:	Size of this structure
 * @bdb_size:		Size of BDB (BDB Header and data blocks)
 */
struct bdb_header {
	u8 signature[16];
	u16 version;
	u16 header_size;
	u16 bdb_size;
} __packed;

/*
 * BDB version number dependencies are documented as:
 *
 * <start>+
 *    indicates the field was introduced in version <start>
 *    and is still valid
 *
 * <start>-<end>
 *    indicates the field was introduced in version <start>
 *    and obsoleted in version <end>+1.
 *

Annotation

• Immediate include surface: `intel_dsi_vbt_defs.h`.
• Detected declarations: `struct bdb_edid_pnp_id`, `struct bdb_edid_product_name`, `struct bdb_edid_dtd`, `struct vbt_header`, `struct bdb_header`, `struct bdb_general_features`, `struct child_device_config`, `struct bdb_general_definitions`, `struct bdb_display_toggle`, `struct bdb_mode_support_list`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.