drm_encoder_index(9)

💅 drm_encoder_index(9) — from the Kernel API Manual, bestie 🎀

okay so real talk, this whole page lives in the Kernel API Manual, and it's about one tiny little function that's lowkey iconic once you get what it does. let's get into it ✨

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🌸 NAME 🌸

drm_encoder_index — find the index of a registered encoder. that's it, that's the whole vibe 🫶

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✨ SYNOPSIS ✨

unsigned int drm_encoder_index (const struct drm_encoder *encoder );

like, that's literally the whole signature. unsigned int in, const struct drm_encoder * argument, and it hands you back a number. no cap, simple queen behavior 👑

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🦋 ARGUMENTS 🦋

• encoder — the encoder you want the index for. yes, the one you're holding right there. give her to the function and she'll tell you where she sits 🧚

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💖 DESCRIPTION 💖

so here's the tea ☕: you hand over a registered encoder, and the function returns the index of that encoder inside a DRM device's list of encoders. that's the whole thing.

it's giving "where in the lineup am I" energy. the way that it just knows 😭✨

keep in mind the word registered — the encoder has to actually be registered, that's the whole premise of the thing. don't be out here asking about an encoder that isn't in the list, that's not what this is for 💀

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🔥 SEE ALSO 🔥

go read these next, they're all in the family and they all ate 💅

• Kernel file ./include/drm/drm_encoder.h
• struct drm_encoder_funcs(9)
• struct drm_encoder(9)
• drmm_encoder_alloc(9)
• drmm_plain_encoder_alloc(9)
• drm_encoder_mask(9)
• drm_encoder_crtc_ok(9)
• drm_encoder_find(9)
• drm_for_each_encoder_mask(9)
• drm_for_each_encoder(9)

like, the whole friend group is here, it's a little reunion fr fr 🌈

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and that's the page!! tysm for reading my whole essay 🥹 this one's brought to you by ./include/drm (that's the source, mwah 💋), October 2026 is the date bestie so mark your calendars ⭐, and it's drm_encoder_index(9) all the way down. slay, bye!! 💜🎀🌸