VC4 PLANE MODULE(9)

✨ VC4 plane module ✨

okay so real talk, this is a page straight out of the Kernel API Manual, section 9, and it's literally just vibes about DRM planes. bestie, it's short but it ate. 🫶

💅 DESCRIPTION

So here's the tea: each DRM plane is a layer of pixels being scanned out by the HVS. that's it, that's the whole concept. iconic. 👑

Now the actual flow, because the way this works is kinda chef's kiss:

• At atomic modeset check time — we compute the HVS display element state that would be necessary for displaying the plane. why? because it gives us a chance to figure out if a plane configuration is invalid. lowkey a vibe check for your plane config. 🔍✨
• At atomic flush time — the CRTC will ask us to write our element state into the region of the HVS that it has allocated for us. so it's giving "you reserved the space, now I'm moving in." 🎀

no cap, that's the whole lifecycle. check first, then hand over the keys. 💖

🌸 SEE ALSO

• Kernel file ./drivers/gpu/drm/vc4/vc4_plane.c — literally the source, go read it, iykyk 🦋

and that's the page!! 🌈 brought to you by ./drivers/gpu/drm/vc4, dated October 2026, bestie. periodt. 💅🌸