131 строка
5.1 KiB
C
131 строка
5.1 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef __DRM_MODESET_H__
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#define __DRM_MODESET_H__
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#include <linux/kref.h>
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struct drm_object_properties;
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struct drm_property;
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struct drm_device;
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/**
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* struct drm_mode_object - base structure for modeset objects
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* @id: userspace visible identifier
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* @type: type of the object, one of DRM_MODE_OBJECT\_\*
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* @properties: properties attached to this object, including values
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* @refcount: reference count for objects which with dynamic lifetime
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* @free_cb: free function callback, only set for objects with dynamic lifetime
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*
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* Base structure for modeset objects visible to userspace. Objects can be
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* looked up using drm_mode_object_find(). Besides basic uapi interface
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* properties like @id and @type it provides two services:
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*
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* - It tracks attached properties and their values. This is used by &drm_crtc,
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* &drm_plane and &drm_connector. Properties are attached by calling
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* drm_object_attach_property() before the object is visible to userspace.
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*
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* - For objects with dynamic lifetimes (as indicated by a non-NULL @free_cb) it
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* provides reference counting through drm_mode_object_reference() and
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* drm_mode_object_unreference(). This is used by &drm_framebuffer,
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* &drm_connector and &drm_property_blob. These objects provide specialized
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* reference counting wrappers.
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*/
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struct drm_mode_object {
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uint32_t id;
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uint32_t type;
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struct drm_object_properties *properties;
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struct kref refcount;
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void (*free_cb)(struct kref *kref);
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};
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#define DRM_OBJECT_MAX_PROPERTY 24
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/**
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* struct drm_object_properties - property tracking for &drm_mode_object
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*/
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struct drm_object_properties {
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/**
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* @count: number of valid properties, must be less than or equal to
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* DRM_OBJECT_MAX_PROPERTY.
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*/
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int count;
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/**
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* @properties: Array of pointers to &drm_property.
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*
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* NOTE: if we ever start dynamically destroying properties (ie.
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* not at drm_mode_config_cleanup() time), then we'd have to do
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* a better job of detaching property from mode objects to avoid
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* dangling property pointers:
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*/
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struct drm_property *properties[DRM_OBJECT_MAX_PROPERTY];
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/**
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* @values: Array to store the property values, matching @properties. Do
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* not read/write values directly, but use
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* drm_object_property_get_value() and drm_object_property_set_value().
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*
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* Note that atomic drivers do not store mutable properties in this
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* array, but only the decoded values in the corresponding state
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* structure. The decoding is done using the &drm_crtc.atomic_get_property and
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* &drm_crtc.atomic_set_property hooks for &struct drm_crtc. For
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* &struct drm_plane the hooks are &drm_plane_funcs.atomic_get_property and
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* &drm_plane_funcs.atomic_set_property. And for &struct drm_connector
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* the hooks are &drm_connector_funcs.atomic_get_property and
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* &drm_connector_funcs.atomic_set_property .
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*
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* Hence atomic drivers should not use drm_object_property_set_value()
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* and drm_object_property_get_value() on mutable objects, i.e. those
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* without the DRM_MODE_PROP_IMMUTABLE flag set.
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*/
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uint64_t values[DRM_OBJECT_MAX_PROPERTY];
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};
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/* Avoid boilerplate. I'm tired of typing. */
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#define DRM_ENUM_NAME_FN(fnname, list) \
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const char *fnname(int val) \
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{ \
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int i; \
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for (i = 0; i < ARRAY_SIZE(list); i++) { \
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if (list[i].type == val) \
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return list[i].name; \
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} \
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return "(unknown)"; \
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}
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struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
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uint32_t id, uint32_t type);
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void drm_mode_object_reference(struct drm_mode_object *obj);
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void drm_mode_object_unreference(struct drm_mode_object *obj);
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int drm_object_property_set_value(struct drm_mode_object *obj,
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struct drm_property *property,
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uint64_t val);
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int drm_object_property_get_value(struct drm_mode_object *obj,
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struct drm_property *property,
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uint64_t *value);
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void drm_object_attach_property(struct drm_mode_object *obj,
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struct drm_property *property,
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uint64_t init_val);
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#endif
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