include/drm/drm_blend.h

Source file repositories/reference/linux-study-clean/include/drm/drm_blend.h

File Facts

System: Linux kernel
Corpus path: include/drm/drm_blend.h
Extension: .h
Size: 2497 bytes
Lines: 64
Domain: Repository Root And Misc
Bucket: include
Inferred role: Repository Root And Misc: implementation source
Status: source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.
Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/list.h
linux/ctype.h
drm/drm_mode.h

Detected Declarations

struct drm_atomic_commit
struct drm_crtc
struct drm_device
struct drm_plane
function drm_rotation_90_or_270

Annotated Snippet

#ifndef __DRM_BLEND_H__
#define __DRM_BLEND_H__

#include <linux/list.h>
#include <linux/ctype.h>
#include <drm/drm_mode.h>

#define DRM_MODE_BLEND_PREMULTI		0
#define DRM_MODE_BLEND_COVERAGE		1
#define DRM_MODE_BLEND_PIXEL_NONE	2

struct drm_atomic_commit;
struct drm_crtc;
struct drm_device;
struct drm_plane;

static inline bool drm_rotation_90_or_270(unsigned int rotation)
{
	return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
}

#define DRM_BLEND_ALPHA_OPAQUE		0xffff

int drm_plane_create_alpha_property(struct drm_plane *plane);
int drm_plane_create_rotation_property(struct drm_plane *plane,
				       unsigned int rotation,
				       unsigned int supported_rotations);
unsigned int drm_rotation_simplify(unsigned int rotation,
				   unsigned int supported_rotations);

int drm_plane_create_zpos_property(struct drm_plane *plane,
				   unsigned int zpos,
				   unsigned int min, unsigned int max);
int drm_plane_create_zpos_immutable_property(struct drm_plane *plane,
					     unsigned int zpos);
int drm_atomic_normalize_zpos(struct drm_device *dev,
			      struct drm_atomic_commit *state);
int drm_plane_create_blend_mode_property(struct drm_plane *plane,
					 unsigned int supported_modes);
void drm_crtc_attach_background_color_property(struct drm_crtc *crtc);
#endif

Annotation

Immediate include surface: `linux/list.h`, `linux/ctype.h`, `drm/drm_mode.h`.
Detected declarations: `struct drm_atomic_commit`, `struct drm_crtc`, `struct drm_device`, `struct drm_plane`, `function drm_rotation_90_or_270`.
Atlas domain: Repository Root And Misc / include.
Implementation status: source implementation candidate.
Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.