325 lines
12 KiB
C
325 lines
12 KiB
C
/*
|
|
* 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_PROPERTY_H__
|
|
#define __DRM_PROPERTY_H__
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/ctype.h>
|
|
#include <drm/drm_mode_object.h>
|
|
|
|
/**
|
|
* struct drm_property_enum - symbolic values for enumerations
|
|
* @value: numeric property value for this enum entry
|
|
* @head: list of enum values, linked to &drm_property.enum_list
|
|
* @name: symbolic name for the enum
|
|
*
|
|
* For enumeration and bitmask properties this structure stores the symbolic
|
|
* decoding for each value. This is used for example for the rotation property.
|
|
*/
|
|
struct drm_property_enum {
|
|
uint64_t value;
|
|
struct list_head head;
|
|
char name[DRM_PROP_NAME_LEN];
|
|
};
|
|
|
|
/**
|
|
* struct drm_property - modeset object property
|
|
*
|
|
* This structure represent a modeset object property. It combines both the name
|
|
* of the property with the set of permissible values. This means that when a
|
|
* driver wants to use a property with the same name on different objects, but
|
|
* with different value ranges, then it must create property for each one. An
|
|
* example would be rotation of &drm_plane, when e.g. the primary plane cannot
|
|
* be rotated. But if both the name and the value range match, then the same
|
|
* property structure can be instantiated multiple times for the same object.
|
|
* Userspace must be able to cope with this and cannot assume that the same
|
|
* symbolic property will have the same modeset object ID on all modeset
|
|
* objects.
|
|
*
|
|
* Properties are created by one of the special functions, as explained in
|
|
* detail in the @flags structure member.
|
|
*
|
|
* To actually expose a property it must be attached to each object using
|
|
* drm_object_attach_property(). Currently properties can only be attached to
|
|
* &drm_connector, &drm_crtc and &drm_plane.
|
|
*
|
|
* Properties are also used as the generic metadatatransport for the atomic
|
|
* IOCTL. Everything that was set directly in structures in the legacy modeset
|
|
* IOCTLs (like the plane source or destination windows, or e.g. the links to
|
|
* the CRTC) is exposed as a property with the DRM_MODE_PROP_ATOMIC flag set.
|
|
*/
|
|
struct drm_property {
|
|
/**
|
|
* @head: per-device list of properties, for cleanup.
|
|
*/
|
|
struct list_head head;
|
|
|
|
/**
|
|
* @base: base KMS object
|
|
*/
|
|
struct drm_mode_object base;
|
|
|
|
/**
|
|
* @flags:
|
|
*
|
|
* Property flags and type. A property needs to be one of the following
|
|
* types:
|
|
*
|
|
* DRM_MODE_PROP_RANGE
|
|
* Range properties report their minimum and maximum admissible unsigned values.
|
|
* The KMS core verifies that values set by application fit in that
|
|
* range. The range is unsigned. Range properties are created using
|
|
* drm_property_create_range().
|
|
*
|
|
* DRM_MODE_PROP_SIGNED_RANGE
|
|
* Range properties report their minimum and maximum admissible unsigned values.
|
|
* The KMS core verifies that values set by application fit in that
|
|
* range. The range is signed. Range properties are created using
|
|
* drm_property_create_signed_range().
|
|
*
|
|
* DRM_MODE_PROP_ENUM
|
|
* Enumerated properties take a numerical value that ranges from 0 to
|
|
* the number of enumerated values defined by the property minus one,
|
|
* and associate a free-formed string name to each value. Applications
|
|
* can retrieve the list of defined value-name pairs and use the
|
|
* numerical value to get and set property instance values. Enum
|
|
* properties are created using drm_property_create_enum().
|
|
*
|
|
* DRM_MODE_PROP_BITMASK
|
|
* Bitmask properties are enumeration properties that additionally
|
|
* restrict all enumerated values to the 0..63 range. Bitmask property
|
|
* instance values combine one or more of the enumerated bits defined
|
|
* by the property. Bitmask properties are created using
|
|
* drm_property_create_bitmask().
|
|
*
|
|
* DRM_MODE_PROB_OBJECT
|
|
* Object properties are used to link modeset objects. This is used
|
|
* extensively in the atomic support to create the display pipeline,
|
|
* by linking &drm_framebuffer to &drm_plane, &drm_plane to
|
|
* &drm_crtc and &drm_connector to &drm_crtc. An object property can
|
|
* only link to a specific type of &drm_mode_object, this limit is
|
|
* enforced by the core. Object properties are created using
|
|
* drm_property_create_object().
|
|
*
|
|
* Object properties work like blob properties, but in a more
|
|
* general fashion. They are limited to atomic drivers and must have
|
|
* the DRM_MODE_PROP_ATOMIC flag set.
|
|
*
|
|
* DRM_MODE_PROP_BLOB
|
|
* Blob properties store a binary blob without any format restriction.
|
|
* The binary blobs are created as KMS standalone objects, and blob
|
|
* property instance values store the ID of their associated blob
|
|
* object. Blob properties are created by calling
|
|
* drm_property_create() with DRM_MODE_PROP_BLOB as the type.
|
|
*
|
|
* Actual blob objects to contain blob data are created using
|
|
* drm_property_create_blob(), or through the corresponding IOCTL.
|
|
*
|
|
* Besides the built-in limit to only accept blob objects blob
|
|
* properties work exactly like object properties. The only reasons
|
|
* blob properties exist is backwards compatibility with existing
|
|
* userspace.
|
|
*
|
|
* In addition a property can have any combination of the below flags:
|
|
*
|
|
* DRM_MODE_PROP_ATOMIC
|
|
* Set for properties which encode atomic modeset state. Such
|
|
* properties are not exposed to legacy userspace.
|
|
*
|
|
* DRM_MODE_PROP_IMMUTABLE
|
|
* Set for properties where userspace cannot be changed by
|
|
* userspace. The kernel is allowed to update the value of these
|
|
* properties. This is generally used to expose probe state to
|
|
* usersapce, e.g. the EDID, or the connector path property on DP
|
|
* MST sinks.
|
|
*/
|
|
uint32_t flags;
|
|
|
|
/**
|
|
* @name: symbolic name of the properties
|
|
*/
|
|
char name[DRM_PROP_NAME_LEN];
|
|
|
|
/**
|
|
* @num_values: size of the @values array.
|
|
*/
|
|
uint32_t num_values;
|
|
|
|
/**
|
|
* @values:
|
|
*
|
|
* Array with limits and values for the property. The
|
|
* interpretation of these limits is dependent upon the type per @flags.
|
|
*/
|
|
uint64_t *values;
|
|
|
|
/**
|
|
* @dev: DRM device
|
|
*/
|
|
struct drm_device *dev;
|
|
|
|
/**
|
|
* @enum_list:
|
|
*
|
|
* List of &drm_prop_enum_list structures with the symbolic names for
|
|
* enum and bitmask values.
|
|
*/
|
|
struct list_head enum_list;
|
|
};
|
|
|
|
/**
|
|
* struct drm_property_blob - Blob data for &drm_property
|
|
* @base: base KMS object
|
|
* @dev: DRM device
|
|
* @head_global: entry on the global blob list in
|
|
* &drm_mode_config.property_blob_list.
|
|
* @head_file: entry on the per-file blob list in &drm_file.blobs list.
|
|
* @length: size of the blob in bytes, invariant over the lifetime of the object
|
|
* @data: actual data, embedded at the end of this structure
|
|
*
|
|
* Blobs are used to store bigger values than what fits directly into the 64
|
|
* bits available for a &drm_property.
|
|
*
|
|
* Blobs are reference counted using drm_property_blob_get() and
|
|
* drm_property_blob_put(). They are created using drm_property_create_blob().
|
|
*/
|
|
struct drm_property_blob {
|
|
struct drm_mode_object base;
|
|
struct drm_device *dev;
|
|
struct list_head head_global;
|
|
struct list_head head_file;
|
|
size_t length;
|
|
unsigned char data[];
|
|
};
|
|
|
|
struct drm_prop_enum_list {
|
|
int type;
|
|
const char *name;
|
|
};
|
|
|
|
#define obj_to_property(x) container_of(x, struct drm_property, base)
|
|
#define obj_to_blob(x) container_of(x, struct drm_property_blob, base)
|
|
|
|
/**
|
|
* drm_property_type_is - check the type of a property
|
|
* @property: property to check
|
|
* @type: property type to compare with
|
|
*
|
|
* This is a helper function becauase the uapi encoding of property types is
|
|
* a bit special for historical reasons.
|
|
*/
|
|
static inline bool drm_property_type_is(struct drm_property *property,
|
|
uint32_t type)
|
|
{
|
|
/* instanceof for props.. handles extended type vs original types: */
|
|
if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
|
|
return (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) == type;
|
|
return property->flags & type;
|
|
}
|
|
|
|
struct drm_property *drm_property_create(struct drm_device *dev, int flags,
|
|
const char *name, int num_values);
|
|
struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
|
|
const char *name,
|
|
const struct drm_prop_enum_list *props,
|
|
int num_values);
|
|
struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
|
|
int flags, const char *name,
|
|
const struct drm_prop_enum_list *props,
|
|
int num_props,
|
|
uint64_t supported_bits);
|
|
struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
|
|
const char *name,
|
|
uint64_t min, uint64_t max);
|
|
struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
|
|
int flags, const char *name,
|
|
int64_t min, int64_t max);
|
|
struct drm_property *drm_property_create_object(struct drm_device *dev,
|
|
int flags, const char *name, uint32_t type);
|
|
struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
|
|
const char *name);
|
|
int drm_property_add_enum(struct drm_property *property, int index,
|
|
uint64_t value, const char *name);
|
|
void drm_property_destroy(struct drm_device *dev, struct drm_property *property);
|
|
|
|
struct drm_property_blob *drm_property_create_blob(struct drm_device *dev,
|
|
size_t length,
|
|
const void *data);
|
|
struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
|
|
uint32_t id);
|
|
int drm_property_replace_global_blob(struct drm_device *dev,
|
|
struct drm_property_blob **replace,
|
|
size_t length,
|
|
const void *data,
|
|
struct drm_mode_object *obj_holds_id,
|
|
struct drm_property *prop_holds_id);
|
|
bool drm_property_replace_blob(struct drm_property_blob **blob,
|
|
struct drm_property_blob *new_blob);
|
|
struct drm_property_blob *drm_property_blob_get(struct drm_property_blob *blob);
|
|
void drm_property_blob_put(struct drm_property_blob *blob);
|
|
|
|
/**
|
|
* drm_property_reference_blob - acquire a blob property reference
|
|
* @blob: DRM blob property
|
|
*
|
|
* This is a compatibility alias for drm_property_blob_get() and should not be
|
|
* used by new code.
|
|
*/
|
|
static inline struct drm_property_blob *
|
|
drm_property_reference_blob(struct drm_property_blob *blob)
|
|
{
|
|
return drm_property_blob_get(blob);
|
|
}
|
|
|
|
/**
|
|
* drm_property_unreference_blob - release a blob property reference
|
|
* @blob: DRM blob property
|
|
*
|
|
* This is a compatibility alias for drm_property_blob_put() and should not be
|
|
* used by new code.
|
|
*/
|
|
static inline void
|
|
drm_property_unreference_blob(struct drm_property_blob *blob)
|
|
{
|
|
drm_property_blob_put(blob);
|
|
}
|
|
|
|
/**
|
|
* drm_property_find - find property object
|
|
* @dev: DRM device
|
|
* @file_priv: drm file to check for lease against.
|
|
* @id: property object id
|
|
*
|
|
* This function looks up the property object specified by id and returns it.
|
|
*/
|
|
static inline struct drm_property *drm_property_find(struct drm_device *dev,
|
|
struct drm_file *file_priv,
|
|
uint32_t id)
|
|
{
|
|
struct drm_mode_object *mo;
|
|
mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_PROPERTY);
|
|
return mo ? obj_to_property(mo) : NULL;
|
|
}
|
|
|
|
#endif
|