DRM_SHADOW_PLANE_MAX_HEIGHT(9)

💖 DRM_SHADOW_PLANE_MAX_HEIGHT(9) 💖

okay bestie, welcome to the Kernel API Manual — today’s main character is DRM_SHADOW_PLANE_MAX_HEIGHT, and she is literally here to tell you the max height of a plane’s shadow buffer in scanlines. no cap 💅

🌸 NAME 🌸

DRM_SHADOW_PLANE_MAX_HEIGHT — the maximum height of a plane’s shadow buffer, measured in scanlines. that’s the whole vibe ✨

✨ SYNOPSIS ✨

it’s giving “one macro, zero drama”:

DRM_SHADOW_PLANE_MAX_HEIGHT

💅 DESCRIPTION 💅

okay so listen 🫶 for drivers with shadow planes, the maximum height of the framebuffer is usually independent from hardware limitations. iconic, honestly.

drivers can initialize struct drm_mode_config.max_height from DRM_SHADOW_PLANE_MAX_HEIGHT. that’s the move. 💖

🦋 SEE ALSO 🦋

• Kernel file ./include/drm/drm_gem_atomic_helper.h — yeah, go look at it, bestie 👀
• DRM_SHADOW_PLANE_MAX_WIDTH(9)
• struct drm_shadow_plane_state(9)
• to_drm_shadow_plane_state(9)
• DRM_GEM_SHADOW_PLANE_FUNCS(9)
• DRM_GEM_SHADOW_PLANE_HELPER_FUNCS(9)
• DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS(9)

okay bye bestie — this page comes from ./include/drm, dated October 2026, and yes it’s the DRM_SHADOW_PLANE_MAX_HEIGHT(9) manual section, mwah 💋