mtk_ovl_adaptor_power_on(9)

✨ mtk_ovl_adaptor_power_on ✨

okay so bestie, this is a page from the Kernel API Manual (kernel-core energy fr fr) and it's about one (1) tiny function that does one (1) very specific little job 💅 buckle up.

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🌸 NAME 🌸

mtk_ovl_adaptor_power_on — literally just powers on the devices inside the OVL adaptor ⚡🔌

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🦋 SYNOPSIS 🦋

int mtk_ovl_adaptor_power_on (struct device *dev );

that's it. that's the whole vibe check 👑

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🎀 ARGUMENTS 🎀

• dev — the device that's getting powered on, no cap 🫶 this is the one you're waking up.

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💖 DESCRIPTION 💖

okay so here's the tea ☕ the OVL adaptor is different from OVL — it's a pseudo device, which means we didn't define it in the device tree at all 🙈 so when .atomic_enable calls pm_runtime_resume_and_get, it literally powers on no device in the OVL adaptor 😭 nothing. zero. nada.

which is why we had to implement this whole function to do the job instead 💅 sometimes you just gotta write the thing yourself, yk? main character energy honestly.

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⭐ RETURN ⭐

• Zero → success, we ate 🔥
• negative number → failure, and it's giving 💀

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🌈 SEE ALSO 🌈

• the kernel file ./drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c — go read the source bestie, it's right there 📖✨
• power_off(9) — the opposite twin, the duo we didn't ask for but needed 🫶

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ngl this one's short but she's iconic. use the return value. respect the negative number. periodt 💅

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and that's the whole page!! brought to you by ./drivers/gpu/drm/mediatek, dated October 2026 — mwah, signing off 🎀🧚💜