[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / drm_mode_object.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.
 */

#include <linux/export.h>
#include <drm/drmP.h>
#include <drm/drm_mode_object.h>
#include <drm/drm_atomic.h>

#include "drm_crtc_internal.h"

/*
 * Internal function to assign a slot in the object idr and optionally
 * register the object into the idr.
 */
int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
			  uint32_t obj_type, bool register_obj,
			  void (*obj_free_cb)(struct kref *kref))
{
	int ret;

	mutex_lock(&dev->mode_config.idr_mutex);
	ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
	if (ret >= 0) {
		/*
		 * Set up the object linking under the protection of the idr
		 * lock so that other users can't see inconsistent state.
		 */
		obj->id = ret;
		obj->type = obj_type;
		if (obj_free_cb) {
			obj->free_cb = obj_free_cb;
			kref_init(&obj->refcount);
		}
	}
	mutex_unlock(&dev->mode_config.idr_mutex);

	return ret < 0 ? ret : 0;
}

/**
 * drm_mode_object_add - allocate a new modeset identifier
 * @dev: DRM device
 * @obj: object pointer, used to generate unique ID
 * @obj_type: object type
 *
 * Create a unique identifier based on @ptr in @dev's identifier space.  Used
 * for tracking modes, CRTCs and connectors.
 *
 * Returns:
 * Zero on success, error code on failure.
 */
int drm_mode_object_add(struct drm_device *dev,
			struct drm_mode_object *obj, uint32_t obj_type)
{
	return __drm_mode_object_add(dev, obj, obj_type, true, NULL);
}

void drm_mode_object_register(struct drm_device *dev,
			      struct drm_mode_object *obj)
{
	mutex_lock(&dev->mode_config.idr_mutex);
	idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
	mutex_unlock(&dev->mode_config.idr_mutex);
}

/**
 * drm_mode_object_unregister - free a modeset identifer
 * @dev: DRM device
 * @object: object to free
 *
 * Free @id from @dev's unique identifier pool.
 * This function can be called multiple times, and guards against
 * multiple removals.
 * These modeset identifiers are _not_ reference counted. Hence don't use this
 * for reference counted modeset objects like framebuffers.
 */
void drm_mode_object_unregister(struct drm_device *dev,
				struct drm_mode_object *object)
{
	mutex_lock(&dev->mode_config.idr_mutex);
	if (object->id) {
		idr_remove(&dev->mode_config.crtc_idr, object->id);
		object->id = 0;
	}
	mutex_unlock(&dev->mode_config.idr_mutex);
}

struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
					       uint32_t id, uint32_t type)
{
	struct drm_mode_object *obj = NULL;

	mutex_lock(&dev->mode_config.idr_mutex);
	obj = idr_find(&dev->mode_config.crtc_idr, id);
	if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
		obj = NULL;
	if (obj && obj->id != id)
		obj = NULL;

	if (obj && obj->free_cb) {
		if (!kref_get_unless_zero(&obj->refcount))
			obj = NULL;
	}
	mutex_unlock(&dev->mode_config.idr_mutex);

	return obj;
}

/**
 * drm_mode_object_find - look up a drm object with static lifetime
 * @dev: drm device
 * @id: id of the mode object
 * @type: type of the mode object
 *
 * This function is used to look up a modeset object. It will acquire a
 * reference for reference counted objects. This reference must be dropped again
 * by callind drm_mode_object_put().
 */
struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
		uint32_t id, uint32_t type)
{
	struct drm_mode_object *obj = NULL;

	obj = __drm_mode_object_find(dev, id, type);
	return obj;
}
EXPORT_SYMBOL(drm_mode_object_find);

/**
 * drm_mode_object_put - release a mode object reference
 * @obj: DRM mode object
 *
 * This function decrements the object's refcount if it is a refcounted modeset
 * object. It is a no-op on any other object. This is used to drop references
 * acquired with drm_mode_object_get().
 */
void drm_mode_object_put(struct drm_mode_object *obj)
{
	if (obj->free_cb) {
		DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
		kref_put(&obj->refcount, obj->free_cb);
	}
}
EXPORT_SYMBOL(drm_mode_object_put);

/**
 * drm_mode_object_get - acquire a mode object reference
 * @obj: DRM mode object
 *
 * This function increments the object's refcount if it is a refcounted modeset
 * object. It is a no-op on any other object. References should be dropped again
 * by calling drm_mode_object_put().
 */
void drm_mode_object_get(struct drm_mode_object *obj)
{
	if (obj->free_cb) {
		DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
		kref_get(&obj->refcount);
	}
}
EXPORT_SYMBOL(drm_mode_object_get);

/**
 * drm_object_attach_property - attach a property to a modeset object
 * @obj: drm modeset object
 * @property: property to attach
 * @init_val: initial value of the property
 *
 * This attaches the given property to the modeset object with the given initial
 * value. Currently this function cannot fail since the properties are stored in
 * a statically sized array.
 */
void drm_object_attach_property(struct drm_mode_object *obj,
				struct drm_property *property,
				uint64_t init_val)
{
	int count = obj->properties->count;

	if (count == DRM_OBJECT_MAX_PROPERTY) {
		WARN(1, "Failed to attach object property (type: 0x%x). Please "
			"increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
			"you see this message on the same object type.\n",
			obj->type);
		return;
	}

	obj->properties->properties[count] = property;
	obj->properties->values[count] = init_val;
	obj->properties->count++;
}
EXPORT_SYMBOL(drm_object_attach_property);

/**
 * drm_object_property_set_value - set the value of a property
 * @obj: drm mode object to set property value for
 * @property: property to set
 * @val: value the property should be set to
 *
 * This function sets a given property on a given object. This function only
 * changes the software state of the property, it does not call into the
 * driver's ->set_property callback.
 *
 * Note that atomic drivers should not have any need to call this, the core will
 * ensure consistency of values reported back to userspace through the
 * appropriate ->atomic_get_property callback. Only legacy drivers should call
 * this function to update the tracked value (after clamping and other
 * restrictions have been applied).
 *
 * Returns:
 * Zero on success, error code on failure.
 */
int drm_object_property_set_value(struct drm_mode_object *obj,
				  struct drm_property *property, uint64_t val)
{
	int i;

	WARN_ON(drm_drv_uses_atomic_modeset(property->dev) &&
		!(property->flags & DRM_MODE_PROP_IMMUTABLE));

	for (i = 0; i < obj->properties->count; i++) {
		if (obj->properties->properties[i] == property) {
			obj->properties->values[i] = val;
			return 0;
		}
	}

	return -EINVAL;
}
EXPORT_SYMBOL(drm_object_property_set_value);

int __drm_object_property_get_value(struct drm_mode_object *obj,
				  struct drm_property *property, uint64_t *val)
{
	int i;

	/* read-only properties bypass atomic mechanism and still store
	 * their value in obj->properties->values[].. mostly to avoid
	 * having to deal w/ EDID and similar props in atomic paths:
	 */
	if (drm_drv_uses_atomic_modeset(property->dev) &&
			!(property->flags & DRM_MODE_PROP_IMMUTABLE))
		return drm_atomic_get_property(obj, property, val);

	for (i = 0; i < obj->properties->count; i++) {
		if (obj->properties->properties[i] == property) {
			*val = obj->properties->values[i];
			return 0;
		}

	}

	return -EINVAL;
}

/**
 * drm_object_property_get_value - retrieve the value of a property
 * @obj: drm mode object to get property value from
 * @property: property to retrieve
 * @val: storage for the property value
 *
 * This function retrieves the softare state of the given property for the given
 * property. Since there is no driver callback to retrieve the current property
 * value this might be out of sync with the hardware, depending upon the driver
 * and property.
 *
 * Atomic drivers should never call this function directly, the core will read
 * out property values through the various ->atomic_get_property callbacks.
 *
 * Returns:
 * Zero on success, error code on failure.
 */
int drm_object_property_get_value(struct drm_mode_object *obj,
				  struct drm_property *property, uint64_t *val)
{
	WARN_ON(drm_drv_uses_atomic_modeset(property->dev));

	return __drm_object_property_get_value(obj, property, val);
}
EXPORT_SYMBOL(drm_object_property_get_value);

/* helper for getconnector and getproperties ioctls */
int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
				   uint32_t __user *prop_ptr,
				   uint64_t __user *prop_values,
				   uint32_t *arg_count_props)
{
	int i, ret, count;

	for (i = 0, count = 0; i < obj->properties->count; i++) {
		struct drm_property *prop = obj->properties->properties[i];
		uint64_t val;

		if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
			continue;

		if (*arg_count_props > count) {
			ret = __drm_object_property_get_value(obj, prop, &val);
			if (ret)
				return ret;

			if (put_user(prop->base.id, prop_ptr + count))
				return -EFAULT;

			if (put_user(val, prop_values + count))
				return -EFAULT;
		}

		count++;
	}
	*arg_count_props = count;

	return 0;
}

/**
 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
 * @dev: DRM device
 * @data: ioctl data
 * @file_priv: DRM file info
 *
 * This function retrieves the current value for an object's property. Compared
 * to the connector specific ioctl this one is extended to also work on crtc and
 * plane objects.
 *
 * Called by the user via ioctl.
 *
 * Returns:
 * Zero on success, negative errno on failure.
 */
int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
				      struct drm_file *file_priv)
{
	struct drm_mode_obj_get_properties *arg = data;
	struct drm_mode_object *obj;
	int ret = 0;

	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		return -EINVAL;

	drm_modeset_lock_all(dev);

	obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
	if (!obj) {
		ret = -ENOENT;
		goto out;
	}
	if (!obj->properties) {
		ret = -EINVAL;
		goto out_unref;
	}

	ret = drm_mode_object_get_properties(obj, file_priv->atomic,
			(uint32_t __user *)(unsigned long)(arg->props_ptr),
			(uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
			&arg->count_props);

out_unref:
	drm_mode_object_put(obj);
out:
	drm_modeset_unlock_all(dev);
	return ret;
}

struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj,
					       uint32_t prop_id)
{
	int i;

	for (i = 0; i < obj->properties->count; i++)
		if (obj->properties->properties[i]->base.id == prop_id)
			return obj->properties->properties[i];

	return NULL;
}

int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
				    struct drm_file *file_priv)
{
	struct drm_mode_obj_set_property *arg = data;
	struct drm_mode_object *arg_obj;
	struct drm_property *property;
	int ret = -EINVAL;
	struct drm_mode_object *ref;

	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		return -EINVAL;

	drm_modeset_lock_all(dev);

	arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
	if (!arg_obj) {
		ret = -ENOENT;
		goto out;
	}

	if (!arg_obj->properties)
		goto out_unref;

	property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
	if (!property)
		goto out_unref;

	if (!drm_property_change_valid_get(property, arg->value, &ref))
		goto out_unref;

	switch (arg_obj->type) {
	case DRM_MODE_OBJECT_CONNECTOR:
		ret = drm_mode_connector_set_obj_prop(arg_obj, property,
						      arg->value);
		break;
	case DRM_MODE_OBJECT_CRTC:
		ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
		break;
	case DRM_MODE_OBJECT_PLANE:
		ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
						  property, arg->value);
		break;
	}

	drm_property_change_valid_put(property, ref);

out_unref:
	drm_mode_object_put(arg_obj);
out:
	drm_modeset_unlock_all(dev);
	return ret;
}
Commit	Line	Data
949619f3 DV	1	/*
	2	* Copyright (c) 2016 Intel Corporation
	3	*
	4	* Permission to use, copy, modify, distribute, and sell this software and its
	5	* documentation for any purpose is hereby granted without fee, provided that
	6	* the above copyright notice appear in all copies and that both that copyright
	7	* notice and this permission notice appear in supporting documentation, and
	8	* that the name of the copyright holders not be used in advertising or
	9	* publicity pertaining to distribution of the software without specific,
	10	* written prior permission. The copyright holders make no representations
	11	* about the suitability of this software for any purpose. It is provided "as
	12	* is" without express or implied warranty.
	13	*
	14	* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
	15	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
	16	* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
	17	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
	18	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
	19	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	20	* OF THIS SOFTWARE.
	21	*/
	22
	23	#include <linux/export.h>
	24	#include <drm/drmP.h>
	25	#include <drm/drm_mode_object.h>
0bfd4a01	26	#include <drm/drm_atomic.h>
949619f3 DV	27
	28	#include "drm_crtc_internal.h"
	29
	30	/*
	31	* Internal function to assign a slot in the object idr and optionally
	32	* register the object into the idr.
	33	*/
2135ea7a TR	34	int __drm_mode_object_add(struct drm_device dev, struct drm_mode_object obj,
	35	uint32_t obj_type, bool register_obj,
	36	void (obj_free_cb)(struct kref kref))
949619f3 DV	37	{
	38	int ret;
	39
	40	mutex_lock(&dev->mode_config.idr_mutex);
	41	ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
	42	if (ret >= 0) {
	43	/*
	44	* Set up the object linking under the protection of the idr
	45	* lock so that other users can't see inconsistent state.
	46	*/
	47	obj->id = ret;
	48	obj->type = obj_type;
	49	if (obj_free_cb) {
	50	obj->free_cb = obj_free_cb;
	51	kref_init(&obj->refcount);
	52	}
	53	}
	54	mutex_unlock(&dev->mode_config.idr_mutex);
	55
	56	return ret < 0 ? ret : 0;
	57	}
	58
	59	/**
2135ea7a	60	* drm_mode_object_add - allocate a new modeset identifier
949619f3 DV	61	* @dev: DRM device
	62	* @obj: object pointer, used to generate unique ID
	63	* @obj_type: object type
	64	*
	65	* Create a unique identifier based on @ptr in @dev's identifier space. Used
2135ea7a	66	* for tracking modes, CRTCs and connectors.
949619f3 DV	67	*
	68	* Returns:
	69	* Zero on success, error code on failure.
	70	*/
2135ea7a	71	int drm_mode_object_add(struct drm_device *dev,
949619f3 DV	72	struct drm_mode_object *obj, uint32_t obj_type)
949619f3 DV	73	{
2135ea7a	74	return __drm_mode_object_add(dev, obj, obj_type, true, NULL);
949619f3 DV	75	}
	76
	77	void drm_mode_object_register(struct drm_device *dev,
	78	struct drm_mode_object *obj)
	79	{
	80	mutex_lock(&dev->mode_config.idr_mutex);
	81	idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
	82	mutex_unlock(&dev->mode_config.idr_mutex);
	83	}
	84
	85	/**
	86	* drm_mode_object_unregister - free a modeset identifer
	87	* @dev: DRM device
	88	* @object: object to free
	89	*
	90	* Free @id from @dev's unique identifier pool.
	91	* This function can be called multiple times, and guards against
	92	* multiple removals.
	93	* These modeset identifiers are _not_ reference counted. Hence don't use this
	94	* for reference counted modeset objects like framebuffers.
	95	*/
	96	void drm_mode_object_unregister(struct drm_device *dev,
a2511a55	97	struct drm_mode_object *object)
949619f3 DV	98	{
	99	mutex_lock(&dev->mode_config.idr_mutex);
	100	if (object->id) {
	101	idr_remove(&dev->mode_config.crtc_idr, object->id);
	102	object->id = 0;
	103	}
	104	mutex_unlock(&dev->mode_config.idr_mutex);
	105	}
	106
	107	struct drm_mode_object __drm_mode_object_find(struct drm_device dev,
	108	uint32_t id, uint32_t type)
	109	{
	110	struct drm_mode_object *obj = NULL;
	111
	112	mutex_lock(&dev->mode_config.idr_mutex);
	113	obj = idr_find(&dev->mode_config.crtc_idr, id);
	114	if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
	115	obj = NULL;
	116	if (obj && obj->id != id)
	117	obj = NULL;
	118
	119	if (obj && obj->free_cb) {
	120	if (!kref_get_unless_zero(&obj->refcount))
	121	obj = NULL;
	122	}
	123	mutex_unlock(&dev->mode_config.idr_mutex);
	124
	125	return obj;
	126	}
	127
	128	/**
	129	* drm_mode_object_find - look up a drm object with static lifetime
	130	* @dev: drm device
	131	* @id: id of the mode object
	132	* @type: type of the mode object
	133	*
	134	* This function is used to look up a modeset object. It will acquire a
	135	* reference for reference counted objects. This reference must be dropped again
020a218f	136	* by callind drm_mode_object_put().
949619f3 DV	137	*/
	138	struct drm_mode_object drm_mode_object_find(struct drm_device dev,
	139	uint32_t id, uint32_t type)
	140	{
	141	struct drm_mode_object *obj = NULL;
	142
	143	obj = __drm_mode_object_find(dev, id, type);
	144	return obj;
	145	}
	146	EXPORT_SYMBOL(drm_mode_object_find);
	147
	148	/**
020a218f TR	149	* drm_mode_object_put - release a mode object reference
020a218f TR	150	* @obj: DRM mode object
949619f3	151	*
a2511a55	152	* This function decrements the object's refcount if it is a refcounted modeset
949619f3	153	* object. It is a no-op on any other object. This is used to drop references
020a218f	154	* acquired with drm_mode_object_get().
949619f3	155	*/
020a218f	156	void drm_mode_object_put(struct drm_mode_object *obj)
949619f3 DV	157	{
949619f3 DV	158	if (obj->free_cb) {
2c935bc5	159	DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
949619f3 DV	160	kref_put(&obj->refcount, obj->free_cb);
	161	}
	162	}
020a218f	163	EXPORT_SYMBOL(drm_mode_object_put);
949619f3 DV	164
949619f3 DV	165	/**
020a218f TR	166	* drm_mode_object_get - acquire a mode object reference
020a218f TR	167	* @obj: DRM mode object
949619f3	168	*
a2511a55	169	* This function increments the object's refcount if it is a refcounted modeset
949619f3	170	* object. It is a no-op on any other object. References should be dropped again
020a218f	171	* by calling drm_mode_object_put().
949619f3	172	*/
020a218f	173	void drm_mode_object_get(struct drm_mode_object *obj)
949619f3 DV	174	{
949619f3 DV	175	if (obj->free_cb) {
2c935bc5	176	DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
949619f3 DV	177	kref_get(&obj->refcount);
	178	}
	179	}
020a218f	180	EXPORT_SYMBOL(drm_mode_object_get);
949619f3 DV	181
	182	/**
	183	* drm_object_attach_property - attach a property to a modeset object
	184	* @obj: drm modeset object
	185	* @property: property to attach
	186	* @init_val: initial value of the property
	187	*
	188	* This attaches the given property to the modeset object with the given initial
	189	* value. Currently this function cannot fail since the properties are stored in
	190	* a statically sized array.
	191	*/
	192	void drm_object_attach_property(struct drm_mode_object *obj,
	193	struct drm_property *property,
	194	uint64_t init_val)
	195	{
	196	int count = obj->properties->count;
	197
	198	if (count == DRM_OBJECT_MAX_PROPERTY) {
	199	WARN(1, "Failed to attach object property (type: 0x%x). Please "
	200	"increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
	201	"you see this message on the same object type.\n",
	202	obj->type);
	203	return;
	204	}
	205
	206	obj->properties->properties[count] = property;
	207	obj->properties->values[count] = init_val;
	208	obj->properties->count++;
949619f3 DV	209	}
	210	EXPORT_SYMBOL(drm_object_attach_property);
	211
	212	/**
	213	* drm_object_property_set_value - set the value of a property
	214	* @obj: drm mode object to set property value for
	215	* @property: property to set
	216	* @val: value the property should be set to
	217	*
a2511a55	218	* This function sets a given property on a given object. This function only
949619f3 DV	219	* changes the software state of the property, it does not call into the
	220	* driver's ->set_property callback.
	221	*
a2511a55 DV	222	* Note that atomic drivers should not have any need to call this, the core will
	223	* ensure consistency of values reported back to userspace through the
	224	* appropriate ->atomic_get_property callback. Only legacy drivers should call
	225	* this function to update the tracked value (after clamping and other
	226	* restrictions have been applied).
	227	*
949619f3 DV	228	* Returns:
	229	* Zero on success, error code on failure.
	230	*/
	231	int drm_object_property_set_value(struct drm_mode_object *obj,
	232	struct drm_property *property, uint64_t val)
	233	{
	234	int i;
	235
4a97a3da DV	236	WARN_ON(drm_drv_uses_atomic_modeset(property->dev) &&
	237	!(property->flags & DRM_MODE_PROP_IMMUTABLE));
	238
949619f3 DV	239	for (i = 0; i < obj->properties->count; i++) {
	240	if (obj->properties->properties[i] == property) {
	241	obj->properties->values[i] = val;
	242	return 0;
	243	}
	244	}
	245
	246	return -EINVAL;
	247	}
	248	EXPORT_SYMBOL(drm_object_property_set_value);
	249
4a97a3da	250	int __drm_object_property_get_value(struct drm_mode_object *obj,
949619f3 DV	251	struct drm_property property, uint64_t val)
	252	{
	253	int i;
	254
	255	/* read-only properties bypass atomic mechanism and still store
	256	* their value in obj->properties->values[].. mostly to avoid
	257	* having to deal w/ EDID and similar props in atomic paths:
	258	*/
0bfd4a01	259	if (drm_drv_uses_atomic_modeset(property->dev) &&
949619f3 DV	260	!(property->flags & DRM_MODE_PROP_IMMUTABLE))
	261	return drm_atomic_get_property(obj, property, val);
	262
	263	for (i = 0; i < obj->properties->count; i++) {
	264	if (obj->properties->properties[i] == property) {
	265	*val = obj->properties->values[i];
	266	return 0;
	267	}
	268
	269	}
	270
	271	return -EINVAL;
	272	}
4a97a3da DV	273
	274	/**
	275	* drm_object_property_get_value - retrieve the value of a property
	276	* @obj: drm mode object to get property value from
	277	* @property: property to retrieve
	278	* @val: storage for the property value
	279	*
	280	* This function retrieves the softare state of the given property for the given
	281	* property. Since there is no driver callback to retrieve the current property
	282	* value this might be out of sync with the hardware, depending upon the driver
	283	* and property.
	284	*
	285	* Atomic drivers should never call this function directly, the core will read
	286	* out property values through the various ->atomic_get_property callbacks.
	287	*
	288	* Returns:
	289	* Zero on success, error code on failure.
	290	*/
	291	int drm_object_property_get_value(struct drm_mode_object *obj,
	292	struct drm_property property, uint64_t val)
	293	{
	294	WARN_ON(drm_drv_uses_atomic_modeset(property->dev));
	295
	296	return __drm_object_property_get_value(obj, property, val);
	297	}
949619f3 DV	298	EXPORT_SYMBOL(drm_object_property_get_value);
	299
	300	/* helper for getconnector and getproperties ioctls */
	301	int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
	302	uint32_t __user *prop_ptr,
	303	uint64_t __user *prop_values,
	304	uint32_t *arg_count_props)
	305	{
f094d881	306	int i, ret, count;
949619f3	307
f094d881 DV	308	for (i = 0, count = 0; i < obj->properties->count; i++) {
	309	struct drm_property *prop = obj->properties->properties[i];
	310	uint64_t val;
949619f3	311
f094d881 DV	312	if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
f094d881 DV	313	continue;
949619f3	314
f094d881	315	if (*arg_count_props > count) {
4a97a3da	316	ret = __drm_object_property_get_value(obj, prop, &val);
949619f3 DV	317	if (ret)
	318	return ret;
	319
f094d881	320	if (put_user(prop->base.id, prop_ptr + count))
949619f3 DV	321	return -EFAULT;
949619f3 DV	322
f094d881	323	if (put_user(val, prop_values + count))
949619f3	324	return -EFAULT;
949619f3	325	}
f094d881 DV	326
f094d881 DV	327	count++;
949619f3	328	}
f094d881	329	*arg_count_props = count;
949619f3 DV	330
	331	return 0;
	332	}
	333
	334	/**
	335	* drm_mode_obj_get_properties_ioctl - get the current value of a object's property
	336	* @dev: DRM device
	337	* @data: ioctl data
	338	* @file_priv: DRM file info
	339	*
	340	* This function retrieves the current value for an object's property. Compared
	341	* to the connector specific ioctl this one is extended to also work on crtc and
	342	* plane objects.
	343	*
	344	* Called by the user via ioctl.
	345	*
	346	* Returns:
	347	* Zero on success, negative errno on failure.
	348	*/
	349	int drm_mode_obj_get_properties_ioctl(struct drm_device dev, void data,
	350	struct drm_file *file_priv)
	351	{
	352	struct drm_mode_obj_get_properties *arg = data;
	353	struct drm_mode_object *obj;
	354	int ret = 0;
	355
	356	if (!drm_core_check_feature(dev, DRIVER_MODESET))
	357	return -EINVAL;
	358
	359	drm_modeset_lock_all(dev);
	360
	361	obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
	362	if (!obj) {
	363	ret = -ENOENT;
	364	goto out;
	365	}
	366	if (!obj->properties) {
	367	ret = -EINVAL;
	368	goto out_unref;
	369	}
	370
	371	ret = drm_mode_object_get_properties(obj, file_priv->atomic,
	372	(uint32_t __user *)(unsigned long)(arg->props_ptr),
	373	(uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
	374	&arg->count_props);
	375
	376	out_unref:
020a218f	377	drm_mode_object_put(obj);
949619f3 DV	378	out:
	379	drm_modeset_unlock_all(dev);
	380	return ret;
	381	}
	382
f92f053b ML	383	struct drm_property drm_mode_obj_find_prop_id(struct drm_mode_object obj,
	384	uint32_t prop_id)
	385	{
	386	int i;
	387
	388	for (i = 0; i < obj->properties->count; i++)
	389	if (obj->properties->properties[i]->base.id == prop_id)
	390	return obj->properties->properties[i];
	391
	392	return NULL;
	393	}
	394
949619f3 DV	395	int drm_mode_obj_set_property_ioctl(struct drm_device dev, void data,
	396	struct drm_file *file_priv)
	397	{
	398	struct drm_mode_obj_set_property *arg = data;
	399	struct drm_mode_object *arg_obj;
949619f3	400	struct drm_property *property;
f92f053b	401	int ret = -EINVAL;
949619f3 DV	402	struct drm_mode_object *ref;
	403
	404	if (!drm_core_check_feature(dev, DRIVER_MODESET))
	405	return -EINVAL;
	406
	407	drm_modeset_lock_all(dev);
	408
	409	arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
	410	if (!arg_obj) {
	411	ret = -ENOENT;
	412	goto out;
	413	}
949619f3	414
f92f053b	415	if (!arg_obj->properties)
949619f3 DV	416	goto out_unref;
949619f3 DV	417
f92f053b ML	418	property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
f92f053b ML	419	if (!property)
949619f3	420	goto out_unref;
949619f3 DV	421
	422	if (!drm_property_change_valid_get(property, arg->value, &ref))
	423	goto out_unref;
	424
	425	switch (arg_obj->type) {
	426	case DRM_MODE_OBJECT_CONNECTOR:
	427	ret = drm_mode_connector_set_obj_prop(arg_obj, property,
	428	arg->value);
	429	break;
	430	case DRM_MODE_OBJECT_CRTC:
	431	ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
	432	break;
	433	case DRM_MODE_OBJECT_PLANE:
	434	ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
	435	property, arg->value);
	436	break;
	437	}
	438
	439	drm_property_change_valid_put(property, ref);
	440
	441	out_unref:
020a218f	442	drm_mode_object_put(arg_obj);
949619f3 DV	443	out:
	444	drm_modeset_unlock_all(dev);
	445	return ret;
	446	}