intel_displ...check_access(9)

🌸 intel_display_driver_check_access — the vibe check for display HW access 🌸

okay so bestie, this is a page from the Kernel API Manual (yes, that manual), and it's about one (1) very specific little function. let's get into it 💅

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✨ NAME ✨

intel_display_driver_check_access — literally just checks if the current thread has display HW access 🎀

(and yes, the original description spells it "disaplay". iconic typo behavior, we stan a typo that made it into the docs fr fr 😭)

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🦋 SYNOPSIS 🦋

bool intel_display_driver_check_access (struct intel_display *display );

that's it. one function, one argument, bool return. clean. minimal. main character energy 👑

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🌈 ARGUMENTS 🌈

• display — the display device instance. that's the whole thing. it just wants the display. 🫶

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💖 DESCRIPTION 💖

so what does it actually DO, you ask? okay so:

It checks whether the current thread has display HW access, and if it doesn't, it prints a debug message. that's the little "hey bestie, you're not supposed to be here" of the kernel world 💀

what counts as "such accesses"? bestie I'm so glad you asked: modeset commits and connector probing. those are the things that need the access. iykyk.

and here's the important part — the actual rule, no cap: if the function returns false, any HW access should be prevented. like, full stop. don't touch the hardware. do not pass go. do not collect $200. 🚫

Returns: true if the current thread has display HW access, false otherwise. that's the entire contract, and honestly? it ate. 🔥

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⭐ SEE ALSO ⭐

• the kernel file it lives in: ./drivers/gpu/drm/i915/display/intel_display_driver.c
• intel_display_driver_enable_user_access(9)
• intel_display_driver_disable_user_access(9)
• intel_display_driver_suspend_access(9)
• intel_display_driver_resume_access(9)

like a little access-management friend group. one enables, one disables, one suspends, one resumes, and this one just... checks. vibe check queen 👑

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lowkey important reminder: false means no HW access, not "eh, try it and see". periodt. 🧚

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and that's the whole page, bestie! it lives in ./drivers/gpu/drm/i915/display, this version is dated October 2026, and it's filed under intel_displ...check_access(9) because even the header got truncated. we love a mysterious queen 💜🎀✨