STRUCT DMUB_FW_META_INFO(9)

💖 struct dmub_fw_meta_info(9) 💖

okay so bestie, welcome to the <pink>Kernel API Manual</pink> ✨ — today we're looking at struct dmub_fw_meta_info, which is literally just the metadata that rides along with the fw binary. like, the firmware's little name tag at the party 🎀 no cap.

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🌸 NAME 🌸

struct dmub_fw_meta_info — metadata associated with fw binary 🫶

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✨ SYNOPSIS ✨

struct dmub_fw_meta_info {
    uint32_t magic_value;
    uint32_t fw_region_size;
    uint32_t trace_buffer_size;
    uint32_t fw_version;
    uint8_t dal_fw;
    uint8_t reserved[3];
    uint32_t shared_state_size;
    uint16_t shared_state_features;
    uint16_t reserved2;
    union dmub_fw_meta_feature_bits feature_bits;
 };

like yes, it's giving struct. it's giving fields. we love a well-organized layout 💅

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🦋 Members 🦋

• magic_value — the magic value that identifies the DMUB firmware meta info 👑 it's the secret handshake, the vibe check, the "yes this is actually ours" ⭐
• fw_region_size — how big the firmware state region is 📏
• trace_buffer_size — how big the tracebuffer region is 🔥
• fw_version — the firmware version information, aka the firmware's birth chart 🌈
• dal_fw — 1 if the firmware is DAL, no cap 💀
• shared_state_size — size of the shared state region, measured in bytes 🍓
• shared_state_features — the number of shared state features ✨

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😭 NOTE 😭

This should be considered a stable API. Fields should not be repurposed or reordered. New fields should be added instead to extend the structure.

fr fr bestie, this is the one thing you cannot fumble 🙈 do not rearrange these fields, do not steal a field's job and give it to something else. if you need more, you add. periodt. 👑

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💜 SEE ALSO 💜

• Kernel file ./drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
• union dmub_addr(9)
• struct dmub_cursor_offload_pipe_data_dcn30_v1(9)
• struct dmub_cursor_offload_pipe_data_dcn401_v1(9)
• struct dmub_cursor_offload_pipe_data_dcn60_v1(9)
• struct dmub_cursor_offload_pipe_data_v1(9)
• struct dmub_cursor_offload_payload_data_v1(9)
• struct dmub_cursor_offload_stream_v1(9)
• struct dmub_cursor_offload_v1(9)
• union dmub_fw_meta_feature_bits(9)
• union dmub_fw_meta(9)
• struct dmcub_trace_buf_entry(9)
• union dmub_fw_boot_status(9)
• enum dmub_fw_boot_status_bit(9)
• enum dmub_cursor_offload_comand_type(9)
• union dmub_fw_boot_options(9)
• enum dmub_shared_state_feature_id(9)
• struct dmub_shared_state_ips_fw(9)
• struct dmub_shared_state_ips_driver(9)
• struct dmub_shared_state_cursor_offload_v1(9)
• struct dmub_shared_state_feature_block(9)
• union dmub_gpint_data_register(9)
• enum dmub_out_cmd_type(9)
• struct dmub_cmd_header(9)
• struct dmub_rb_cmd_common(9)
• struct dmub_cmd_PLAT_54186_wa(9)
• struct dmub_rb_cmd_PLAT_54186_wa(9)
• enum dmub_cmd_mall_type(9)
• struct dmub_rb_cmd_mall(9)
• enum dmub_cmd_cab_type(9)
• struct dmub_rb_cmd_cab_for_ss(9)
• enum dmub_fams2_allow_delay_check_mode(9)
• enum dmub_cmd_idle_opt_type(9)
• struct dmub_rb_cmd_idle_opt_dcn_restore(9)
• struct dmub_dcn_notify_idle_cntl_data(9)
• struct dmub_rb_cmd_idle_opt_dcn_notify_idle(9)
• enum dmub_idle_opt_dc_power_state(9)
• struct dmub_idle_opt_set_dc_power_state_data(9)
• struct dmub_rb_cmd_idle_opt_set_dc_power_state(9)
• struct dmub_clocks(9)
• enum dmub_cmd_clk_mgr_type(9)
• struct dmub_rb_cmd_clk_mgr_notify_clocks(9)
• struct dmub_cmd_digx_encoder_control_data(9)
• struct dmub_rb_cmd_digx_encoder_control(9)
• struct dmub_cmd_set_pixel_clock_data(9)
• struct dmub_cmd_enable_disp_power_gating_data(9)
• struct dmub_rb_cmd_enable_disp_power_gating(9)
• struct dmub_dig_transmitter_control_data_v1_7(9)
• union dmub_cmd_dig1_transmitter_control_data(9)
• struct dmub_rb_cmd_dig1_transmitter_control(9)
• struct dmub_rb_cmd_domain_control_data(9)
• struct dmub_rb_cmd_domain_control(9)
• struct dmub_rb_cmd_dpphy_init(9)
• enum dp_aux_request_action(9)
• enum aux_return_code_type(9)
• enum aux_channel_type(9)
• struct aux_transaction_parameters(9)
• struct dmub_rb_cmd_hpd_sense_notify(9)
• enum dmub_phy_fsm_state(9)
• enum dmub_abm_ace_curve_type(9)
• enum dmub_abm_histogram_type(9)
• enum dmub_cmd_panel_cntl_type(9)
• struct dmub_cmd_panel_cntl_data(9)
• struct dmub_rb_cmd_panel_cntl(9)
• struct dmub_cmd_cable_id_input(9)
• struct dmub_cmd_cursor_offload_init_data(9)
• struct dmub_rb_cmd_cursor_offload_init(9)
• struct dmub_cmd_cursor_offload_stream_data(9)
• struct dmub_rb_cmd_cursor_offload_stream_cntl(9)
• union dmub_rb_cmd(9)
• union dmub_rb_out_cmd(9)
• struct dmub_rb_init_params(9)
• struct dmub_rb(9)

like that's a whole friend group, iykyk 💖

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and that's the page!! 🌟 live from ./drivers/gpu/drm/amd/display/..., dated October 2026, it's struct dmub_fw_meta_info(9) signing off — stay stable, stay un-reordered, and don't touch the field order bestie 🧚💜