dcn60_make_...pdate_action(9)

💅 dcn60_make_bandwidth_clocks_update_action — a Kernel API Manual moment (section 9, bestie)

okay so this is from the Kernel API Manual, section 9, and the whole function name literally got squished into dcn60_make_...pdate_action up top because manpage headers are dramatic like that. anyway. let's get into it 🫶

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✨ NAME ✨

dcn60_make_bandwidth_clocks_update_action — figure out which clock and p-state updates are actually needed, by comparing new_clocks against the current clk_mgr state. it's giving "diff but for clocks" 💅

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🦋 SYNOPSIS 🦋

void dcn60_make_bandwidth_clocks_update_action (struct
dcn60_bandwidth_clocks_update_action *action , struct clk_mgr
*clk_mgr_base , struct dc_state *context , struct dc_clocks *new_clocks
, bool safe_to_lower );

no return value, she just fills in your action struct and dips ✨

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🎀 ARGUMENTS 🎀

• action — the output action struct. it comes in zeroed, and this function is the one that populates it. so like, this is the whole point of the call tbh 👑
• clk_mgr_base — the current clock manager state. read-only, hands off, look but don't touch 🙈
• context — the dc state, with all the active plane information in it 🛋️
• new_clocks — the requested clock values, i.e. what we're comparing against the current state. the "new" in question 💖
• safe_to_lower — a bool that says whether clocks are allowed to decrease. if this says no, bestie, they do not go down 📉

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🌈 SEE ALSO 🌈

• the kernel file itself: ./drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c 👀
• dcn60_populate_dc_mode_limit(9)
• dcn60_populate_clk_table(9)
• dcn60_build_bandwidth_clocks_block_sequence_with_action(9)
• dcn60_update_bandwidth_clocks_state_with_action(9)
• dcn60_build_update_bandwidth_clocks_sequence(9)

all the siblings, all iconic, go read them too fr fr 📚

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ngl the whole vibe here is: compare new vs current, decide what has to change, write it into action, done. no cap, that's the entire arc 🌸

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and that's the page!! source path is ./drivers/gpu/drm/amd/display/..., dated October 2026, filed under the Kernel API Manual — mwah, stan, bye 💋🎀🧚