UNION DMUB_FW_BOOT_OPTIONS(9)

💅 union dmub_fw_boot_options(9) — Kernel API Manual, section 9 🎀

okay bestie, welcome to the manual page for union dmub_fw_boot_options ✨ this one lives in the Kernel API Manual (section 9, iykyk) and it's basically the boot option definitions for SCRATCH14 — like the little settings menu the firmware reads when it wakes up 🌸

🦋 NAME 🦋

• union dmub_fw_boot_options — Boot option definitions for SCRATCH14

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✨ SYNOPSIS ✨

so this is the whole shape of it, literally verbatim, don't touch a single character 💅

union dmub_fw_boot_options {
    struct {
      uint32_t pemu_env : 1;
      uint32_t fpga_env : 1;
      uint32_t optimized_init : 1;
      uint32_t skip_phy_access : 1;
      uint32_t disable_clk_gate: 1;
      uint32_t skip_phy_init_panel_sequence: 1;
      uint32_t z10_disable: 1;
      uint32_t enable_dpia: 1;
      uint32_t invalid_vbios_data: 1;
      uint32_t dpia_supported: 1;
      uint32_t sel_mux_phy_c_d_phy_f_g: 1;
      uint32_t power_optimization: 1;
      uint32_t diag_env: 1;
      uint32_t gpint_scratch8: 1;
      uint32_t usb4_cm_version: 1;
      uint32_t dpia_hpd_int_enable_supported: 1;
      uint32_t enable_non_transparent_setconfig: 1;
      uint32_t disable_clk_ds: 1;
      uint32_t disable_timeout_recovery : 1;
      uint32_t ips_pg_disable: 1;
      uint32_t ips_disable: 3;
      uint32_t ips_sequential_ono: 1;
      uint32_t disable_sldo_opt: 1;
      uint32_t lower_hbr3_phy_ssc: 1;
      uint32_t override_hbr3_pll_vco: 1;
      uint32_t disable_dpia_bw_allocation: 1;
      uint32_t bootcrc_en_at_preos: 1;
      uint32_t bootcrc_en_at_S0i3: 1;
      uint32_t bootcrc_boot_mode: 1;
      uint32_t reserved : 1;
    } bits;
    uint32_t all;
 };

it's giving very "one struct, two ways to look at it" 🫶 — there's a bits struct where every option is a bitfield, and then an all member next to it. a lot of them are : 1 (single-bit on/off vibes), but ips_disable is special and gets : 3 whole bits, main character energy honestly 👑 and yeah, the last one is literally called reserved, iconic 💀

ngl, copy those field names EXACTLY as written — ips_sequential_ono is spelled that way (yes, ono, not on), and bootcrc_en_at_S0i3 has that capital S in it. don't "fix" them, fr fr 😭

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🌈 Members 🌈

so lowkey the Members section in the source manpage is… empty 🙈 like there's the heading and then absolutely nothing under it. no bullets, no descriptions, nada. the field names all live up in the SYNOPSIS block above, so that's where you get them — every single one, character for character 💖

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🌸 SEE ALSO 🌸

Kernel file ./drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h — that's the home base, and everything below hangs out with it 🦋

• 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)
• struct dmub_fw_meta_info(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)
• 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)

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okay that's the whole thing bestie, you ate that 🫶💖 one last cute sign-off: this page ships from ./drivers/gpu/drm/amd/display/... (that's the source path as printed, ellipsis and all, no cap 👀) and it's dated October 2026 ⭐ — and yes, it's union dmub_fw_boot_options(9) all the way down, periodt 💅✨🌸