intel_cdclk_clock_changed(9)

💅 intel_cdclk_clock_changed — like, did the clock actually change bestie? 👀

okay so real talk, this one lives in the Kernel API Manual and honestly it's giving "tiny function, huge responsibility." Let's get into it ✨

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🌸 NAME 🌸

intel_cdclk_clock_changed — check whether the clock changed 🕐💫

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🦋 SYNOPSIS 🦋

bool intel_cdclk_clock_changed (const struct intel_cdclk_config *a ,
const struct intel_cdclk_config *b );

like yes that's the whole vibe. two configs walk in, a bool walks out 😌

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🎀 ARGUMENTS 🎀

• a — the first CDCLK configuration. bestie number one 💖
• b — the second CDCLK configuration. bestie number two 🫶

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⭐ RETURN ⭐

Returns True if CDCLK changed in a way that requires re-programming, and False otherwise.

so like… True means "oop, we gotta re-program this", False means "we're so chill, nothing to do here" 💅 no cap, that's the whole answer.

ngl this is one of those "small function, do not skip the details" situations — the "in a way that requires re-programming" part is the whole point, don't flatten it 🙈

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🌈 SEE ALSO 🌈

okay this list is long but we're doing it, every single one, no skipping, periodt 👑

• Kernel file ./drivers/gpu/drm/i915/display/intel_cdclk.c — CDCLK / RAWCLK(9) 🔥
• intel_cdclk_init_hw(9)
• intel_cdclk_uninit_hw(9)
• intel_cdclk_can_cd2x_update(9)
• intel_cdclk_changed(9)
• intel_set_cdclk_pre_plane_update(9)
• intel_set_cdclk_post_plane_update(9)
• intel_update_max_cdclk(9)
• intel_update_cdclk(9)
• intel_read_rawclk(9)
• intel_init_cdclk_hooks(9)

like, the whole cdclk friend group showed up 🧚✨ iykyk

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and that's the page!! mwah 💋 this gem comes to you from ./drivers/gpu/drm/i915/display, dated October 2026, straight outta the Kernel API Manual — go read the source babes, it's iconic 🌟💜