drm_plane_cr...ode_property(9)

💅 NAME 💅

drm_plane_create_blend_mode_property — create a new blend mode property

okay so picture this: you're deep in the kernel, you've got a plane, and you need a fresh blend mode property. That's the whole gig. Iconic, honestly.

(fyi the page header up top calls this thing drm_plane_cr...ode_property(9), because even the manpage couldn't fit the whole name in — the full function is drm_plane_create_blend_mode_property, and yes she's from the Kernel API Manual, section 9 🎀)

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✨ SYNOPSIS ✨

int drm_plane_create_blend_mode_property (struct drm_plane *plane ,
unsigned int supported_modes );

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🫶 ARGUMENTS 🫶

• plane — the drm plane. Your main character. The whole property gets built for her 💖
• supported_modes — a bitmask of supported modes. Lowkey the important detail: when BIT(DRM_MODE_BLEND_PREMULTI) is included in that mask, it gets used as the default. Otherwise the default falls back to one of the supported modes. No cap, that's the rule 🌸

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🦋 DESCRIPTION 🦋

So what does this thing actually do? It creates a new property describing the blend mode. That's it, that's the vibe 💅

The property that gets exposed to userspace is an enumeration property (peep drm_property_create_enum for the receipts) and it's called "pixel blend mode". It ships with these enumeration values:

• "None" — blend formula that ignores the pixel alpha. Alpha? Never heard of her.
• "Pre-multiplied" — blend formula that assumes the pixel color values have already been pre-multiplied with the alpha channel values. The work is done, bestie, she pre-gamed.
• "Coverage" — blend formula that assumes the pixel color values have not been pre-multiplied, and will do so when blending them to the background color values. DIY alpha moment 🧚

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🔥 RETURN 🔥

Zero for success, or -errno. That's the whole spectrum. Zero = slay, -errno = not slay 😭

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👑 SEE ALSO 👑

• Kernel file ./drivers/gpu/drm/drm_blend.c
• overview(9)
• drm_plane_create_alpha_property(9)
• drm_plane_create_rotation_property(9)
• drm_rotation_simplify(9)
• drm_plane_create_zpos_property(9)
• drm_plane_create_zpos_immutable_property(9)
• drm_atomic_normalize_zpos(9)
• drm_crtc_attach_background_color_property(9)

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🌈 okay that's the whole page! Source directory is ./drivers/gpu/drm, dated October 2026, and the manual tag for the girlies keeping track is drm_plane_cr...ode_property(9). Go build your properties, bestie — you're literally so good at this 💜✨🎀