drm_of_component_probe(9)

💅 drm_of_component_probe — a Kernel API Manual moment

okay bestie, so this page is from the Kernel API Manual (yes, that manual), and today's main character is drm_of_component_probe(9). buckle up, she's a probe function and she's iconic ✨

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🌸 NAME 🌸

drm_of_component_probe — the generic probe function for a component based master, fr fr 🫶

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✨ SYNOPSIS ✨

int drm_of_component_probe (struct device *dev , int
(*compare_of)(struct device *, void *) , const struct
component_master_ops *m_ops );

like, that's the whole vibe right there 💅

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🎀 ARGUMENTS 🎀

• dev — the master device containing the OF node. she's the one holding the node, okay 👑
• compare_of — the compare function used for matching components. lowkey the matchmaker of the whole operation 🧚
• m_ops — the component master ops to be used. these are the ops she's gonna run with 💖

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🦋 DESCRIPTION 🦋

so what she actually does: she parses the platform device OF node and binds all the components associated with the master. no cap, all of them.

the important little detail bestie — interface ports are added before the encoders, and that's specifically in order to satisfy their .bind requirements. it's giving "order matters, do not come for me" energy 😭🔥

the bindings live here, go read them iykyk:

https://github.com/devicetree-org/dt-
schema/blob/main/dtschema/schemas/graph.yaml

and the return value? she returns zero if successful, or one of the standard error codes if it fails. that's it, that's the whole tea ☕

ngl the "standard error codes" part means you should actually check the return, bestie. don't just ignore her 🙈

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💜 SEE ALSO 💜

literally the whole drm_of.c friend group, periodt:

• Kernel file ./drivers/gpu/drm/drm_of.c
• overview(9)
• drm_of_crtc_port_mask(9)
• drm_of_find_possible_crtcs(9)
• drm_of_component_match_add(9)
• drm_of_get_panel_orientation(9)
• drm_of_find_panel_or_bridge(9)
• drm_of_lvds_get_dual_link_pixel_order(9)
• drm_of_lvds_get_dual_link_pixel_order_sink(9)
• drm_of_lvds_get_data_mapping(9)
• drm_of_get_data_lanes_count(9)
• drm_of_get_data_lanes_count_ep(9)
• drm_of_get_data_lanes_count_remote(9)
• drm_of_get_dsi_bus(9)

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🌈 sign-off 🌈

and that's the page!! she lives in ./drivers/gpu/drm, she's dated October 2026, and she answers to the name drm_of_component_probe(9). go forth and probe responsibly, bestie 💖🦋🍓⭐👑