drm_mode_object.h | Explore in Territory

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#ifndef __DRM_MODESET_H__
#define __DRM_MODESET_H__

#include <linux/kref.h>
#include <drm/drm_lease.h>
struct drm_object_properties;
struct drm_property;
struct drm_device;
struct drm_file;

/**
 * struct drm_mode_object - base structure for modeset objects
 * @id: userspace visible identifier
 * @type: type of the object, one of DRM_MODE_OBJECT\_\*
 * @properties: properties attached to this object, including values
 * @refcount: reference count for objects which with dynamic lifetime
 * @free_cb: free function callback, only set for objects with dynamic lifetime
 *
 * Base structure for modeset objects visible to userspace. Objects can be
 * looked up using drm_mode_object_find(). Besides basic uapi interface
 * properties like @id and @type it provides two services:
 *
 * - It tracks attached properties and their values. This is used by &drm_crtc,
 *   &drm_plane and &drm_connector. Properties are attached by calling
 *   drm_object_attach_property() before the object is visible to userspace.
 *
 * - For objects with dynamic lifetimes (as indicated by a non-NULL @free_cb) it
 *   provides reference counting through drm_mode_object_get() and
 *   drm_mode_object_put(). This is used by &drm_framebuffer, &drm_connector
 *   and &drm_property_blob. These objects provide specialized reference
 *   counting wrappers.
 */
struct drm_mode_object { … };

#define DRM_OBJECT_MAX_PROPERTY …
/**
 * struct drm_object_properties - property tracking for &drm_mode_object
 */
struct drm_object_properties { … };

/* Avoid boilerplate.  I'm tired of typing. */
#define DRM_ENUM_NAME_FN(fnname, list) …

struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
					     struct drm_file *file_priv,
					     uint32_t id, uint32_t type);
void drm_mode_object_get(struct drm_mode_object *obj);
void drm_mode_object_put(struct drm_mode_object *obj);

int drm_object_property_set_value(struct drm_mode_object *obj,
				  struct drm_property *property,
				  uint64_t val);
int drm_object_property_get_value(struct drm_mode_object *obj,
				  struct drm_property *property,
				  uint64_t *value);
int drm_object_property_get_default_value(struct drm_mode_object *obj,
					  struct drm_property *property,
					  uint64_t *val);

void drm_object_attach_property(struct drm_mode_object *obj,
				struct drm_property *property,
				uint64_t init_val);

bool drm_mode_object_lease_required(uint32_t type);
#endif
linux/include/drm/drm_mode_object.h
