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135 lines
5.2 KiB
135 lines
5.2 KiB
/* |
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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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#include <drm/drm_lease.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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struct drm_file; |
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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_get() and |
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* drm_mode_object_put(). This is used by &drm_framebuffer, &drm_connector |
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* and &drm_property_blob. These objects provide specialized reference |
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* 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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struct drm_file *file_priv, |
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uint32_t id, uint32_t type); |
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void drm_mode_object_get(struct drm_mode_object *obj); |
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void drm_mode_object_put(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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bool drm_mode_object_lease_required(uint32_t type); |
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#endif
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