ENUM DMUB_OUT_CMD_TYPE(9)

💅 enum dmub_out_cmd_type — from the Kernel API Manual, bestie ✨

Okay so real talk: this page is from the Kernel API Manual, and it's about enum dmub_out_cmd_type, the DMUB outbox commands. That's it. That's the whole vibe. The docs girlies did NOT come through with the descriptions on this one, so we're gonna stan the structure and keep it 100 about what's actually written down. 🫶

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✨ NAME ✨

enum dmub_out_cmd_type — DMUB outbox commands. Periodt. 💅

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🌸 SYNOPSIS 🌸

Here's the whole enum, exactly as it lives, no edits, no cap:

enum dmub_out_cmd_type {
    DMUB_OUT_CMD__NULL ,
    DMUB_OUT_CMD__DP_AUX_REPLY ,
    DMUB_OUT_CMD__DP_HPD_NOTIFY ,
    DMUB_OUT_CMD__SET_CONFIG_REPLY ,
    DMUB_OUT_CMD__DPIA_NOTIFICATION ,
    DMUB_OUT_CMD__HPD_SENSE_NOTIFY ,
    DMUB_OUT_CMD__FUSED_IO

};

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🎀 Constants 🎀

Seven members, seven mystery boxes. The original page literally says -- undescribed -- for every single one, and I refuse to make up lore that isn't there (that would be lying and lying is not the move 🙈). So here's the roster, all iconic, all undocumented:

• DMUB_OUT_CMD__NULL — -- undescribed --
• DMUB_OUT_CMD__DP_AUX_REPLY — -- undescribed --
• DMUB_OUT_CMD__DP_HPD_NOTIFY — -- undescribed --
• DMUB_OUT_CMD__SET_CONFIG_REPLY — -- undescribed --
• DMUB_OUT_CMD__DPIA_NOTIFICATION — -- undescribed --
• DMUB_OUT_CMD__HPD_SENSE_NOTIFY — -- undescribed --
• DMUB_OUT_CMD__FUSED_IO — -- undescribed --

Not me writing seven identical placeholder lines and feeling like a scribe 💀 That's genuinely what the source says, bestie — no descriptions exist, so neither do I invent them.

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🦋 SEE ALSO 🦋

First up, the file this whole thing lives in — kernel file ./drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h. That's the home base, the main character address. 🏠

And then the friend group. The whole extended cast, all (9) sections, every single one, in order, because we do NOT skip people at the function:

• 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)
• 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)
• 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)

That's the whole group chat. Say hi. 🫡

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Okay that's the page!! Before you go, the little footer receipts: this came from the source line ./drivers/gpu/drm/amd/display/... and it's dated October 2026, and the manual name on the tin is Kernel API Manual. Love that for us. Bye bestie, go read dmub_cmd.h and slay 💖✨🎀🦋🌸