dcn32_subvp_drr_admissable(9)

💅 dcn32_subvp_drr_admissable

okay so bestie, welcome to the Kernel API Manual ✨ this one lives in the kernel-API corner of the docs, and it's literally the vibe check for whether SubVP + DRR can hang out together. yes it's a real function, yes it's a bool, yes we're gonna get through it together 🫶

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🌸 NAME 🌸

dcn32_subvp_drr_admissable — determine if a SubVP + DRR config is admissible 👑 like, is this combination allowed in the group chat or not

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✨ SYNOPSIS ✨

bool dcn32_subvp_drr_admissable (struct dc *dc , struct dc_state
*context );

that's the whole signature, no cap. it takes two pointers and gives you back a bool. simple. iconic. 💅

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🎀 ARGUMENTS 🎀

• dc — the current DC state, aka what's going on right now
• context — the new DC state that's about to be programmed, aka the glow-up we're considering

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🦋 DESCRIPTION 🦋

SubVP + DRR is admissible only if all of these are true, fr fr — it's giving checklist energy:

• Config must have 2 displays (i.e., 2 non-phantom master pipes) 👯‍♀️ exactly two, no more no less
• One display is SubVP
• The other display must have Freesync enabled
• The potential DRR display must not be PSR capable — nope, not allowed, that's the rule 🙈

miss even one of these and the whole thing falls apart, sorry bestie 😭

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⭐ RETURN ⭐

• True if it's admissible 💖
• false otherwise 💀

that's it. that's the return. binary queen behavior.

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🌈 SEE ALSO 🌈

• Kernel file: ./drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource_helpers.c
• dcn32_helper_calculate_num_ways_for_subvp(9)
• dcn32_determine_det_override(9)
• dcn32_can_support_mclk_switch_using_fw_based_vblank_stretch(9)
• disallow_subvp_in_active_plus_blank(9)
• dcn32_subvp_vblank_admissable(9)

go read those next, they're all in the same friend group 🧚✨

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💜 ok that's the whole page!! source/version: Kernel API Manual, from ./drivers/gpu/drm/amd/display/... — dated October 2026. mwah, bye bestie 🍓💅✨