drm_helper_encoder_in_use(9)

💅 drm_helper_encoder_in_use (9) — Kernel API Manual

okay so bestie, welcome to the glow-up era of the kernel API manual ✨ this one is about drm_helper_encoder_in_use, and honestly? it's a vibe check for encoders. let's get into it 🎀

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🦋 NAME

drm_helper_encoder_in_use — literally the "are you even being used rn" check for a given encoder 💅

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✨ SYNOPSIS

bool drm_helper_encoder_in_use (struct drm_encoder *encoder );

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🌸 ARGUMENTS

• encoder — the encoder we're checking. that's it, that's the whole argument. she's the main character of this function 🫶

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👑 DESCRIPTION

so what this does is: it checks whether encoder is in use by any connector, as part of the current mode setting output configuration. like, is she part of the group chat or not 💬

⚠️ but bestie, listen — this does not mean the encoder is actually enabled. nope. the DPMS state is tracked separately, so "in use" ≠ "turned on". do not conflate them, i'm begging 🙈

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🔥 RETURN

Returns true if encoder is used, and false otherwise. simple. clean. iconic. ⭐

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💜 SEE ALSO

• Kernel file ./drivers/gpu/drm/drm_crtc_helper.c overview(9)
• drm_helper_crtc_in_use(9)
• drm_helper_disable_unused_functions(9)
• drm_crtc_helper_set_mode(9)
• drm_crtc_helper_atomic_check(9)
• drm_crtc_helper_set_config(9)
• drm_helper_connector_dpms(9)
• drm_helper_resume_force_mode(9)
• drm_helper_force_disable_all(9)

like, go read the whole friend group, they all support each other fr fr 🌈

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that's the whole page, no notes 🧚 this lil doc lives under ./drivers/gpu/drm, dated October 2026 — slay, see u in the source tree 💖