include/drm/drm_mode_object.h

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

File Facts

System
Linux kernel
Corpus path
include/drm/drm_mode_object.h
Extension
.h
Size
5719 bytes
Lines
146
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct drm_mode_object {
	uint32_t id;
	uint32_t type;
	struct drm_object_properties *properties;
	struct kref refcount;
	void (*free_cb)(struct kref *kref);
};

#define DRM_OBJECT_MAX_PROPERTY 64
/**
 * struct drm_object_properties - property tracking for &drm_mode_object
 */
struct drm_object_properties {
	/**
	 * @count: number of valid properties, must be less than or equal to
	 * DRM_OBJECT_MAX_PROPERTY.
	 */

	int count;
	/**
	 * @properties: Array of pointers to &drm_property.
	 *
	 * NOTE: if we ever start dynamically destroying properties (ie.
	 * not at drm_mode_config_cleanup() time), then we'd have to do
	 * a better job of detaching property from mode objects to avoid
	 * dangling property pointers:
	 */
	struct drm_property *properties[DRM_OBJECT_MAX_PROPERTY];

	/**
	 * @values: Array to store the property values, matching @properties. Do
	 * not read/write values directly, but use
	 * drm_object_property_get_value() and drm_object_property_set_value().
	 *
	 * Note that atomic drivers do not store mutable properties in this
	 * array, but only the decoded values in the corresponding state
	 * structure. The decoding is done using the &drm_crtc.atomic_get_property and
	 * &drm_crtc.atomic_set_property hooks for &struct drm_crtc. For
	 * &struct drm_plane the hooks are &drm_plane_funcs.atomic_get_property and
	 * &drm_plane_funcs.atomic_set_property. And for &struct drm_connector
	 * the hooks are &drm_connector_funcs.atomic_get_property and
	 * &drm_connector_funcs.atomic_set_property .
	 *
	 * Hence atomic drivers should not use drm_object_property_set_value()
	 * and drm_object_property_get_value() on mutable objects, i.e. those
	 * without the DRM_MODE_PROP_IMMUTABLE flag set.
	 *
	 * For atomic drivers the default value of properties is stored in this
	 * array, so drm_object_property_get_default_value can be used to
	 * retrieve it.
	 */
	uint64_t values[DRM_OBJECT_MAX_PROPERTY];
};

/* Avoid boilerplate.  I'm tired of typing. */
#define DRM_ENUM_NAME_FN(fnname, list)				\
	const char *fnname(int val)				\
	{							\
		int i;						\
		for (i = 0; i < ARRAY_SIZE(list); i++) {	\
			if (list[i].type == val)		\
				return list[i].name;		\
		}						\
		return "(unknown)";				\
	}

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);
int drm_object_immutable_property_get_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);

Annotation

Implementation Notes