DP DUAL MODE HELPERS(9)

💅 dp dual mode helpers 💅

okay so bestie, this is the dp dual mode helpers(9) page from the Kernel API Manual, and it’s lowkey just helper functions to deal with DP dual mode (aka. DP++) adaptors. 💖 no cap, that’s the whole assignment.

the vibe check is giving two types, and they’re both important:

• Type 1: Adaptor registers (if any) and the sink DDC bus may be accessed via I2C. 🎀
• Type 2: Adaptor registers and sink DDC bus can be accessed either via I2C or I2C-over-AUX. Source devices may choose to implement either of these access methods. ✨

iykyk: those two types are the main character energy of this page — don’t mix them up. 💅

✨ SEE ALSO ✨

obsessed with a good SEE ALSO section, so here’s the whole friend group — every single one, fr fr 🫶:

• Kernel file ./drivers/gpu/drm/display/drm_dp_dual_mode_helper.c
• drm_dp_dual_mode_read(9)
• drm_dp_dual_mode_write(9)
• drm_dp_dual_mode_detect(9)
• drm_dp_dual_mode_max_tmds_clock(9)
• drm_dp_dual_mode_get_tmds_output(9)
• drm_dp_dual_mode_set_tmds_output(9)
• drm_dp_get_dual_mode_type_name(9)
• drm_lspcon_get_mode(9)
• drm_lspcon_set_mode(9)

mwah 💋 source check: this page comes from ./drivers/gpu/drm/display, it’s dated October 2026, and it’s literally called dp dual mode helpers(9). slay and goodbye. 👑