1949619f3SDaniel Vetter /*
2949619f3SDaniel Vetter * Copyright (c) 2016 Intel Corporation
3949619f3SDaniel Vetter *
4949619f3SDaniel Vetter * Permission to use, copy, modify, distribute, and sell this software and its
5949619f3SDaniel Vetter * documentation for any purpose is hereby granted without fee, provided that
6949619f3SDaniel Vetter * the above copyright notice appear in all copies and that both that copyright
7949619f3SDaniel Vetter * notice and this permission notice appear in supporting documentation, and
8949619f3SDaniel Vetter * that the name of the copyright holders not be used in advertising or
9949619f3SDaniel Vetter * publicity pertaining to distribution of the software without specific,
10949619f3SDaniel Vetter * written prior permission. The copyright holders make no representations
11949619f3SDaniel Vetter * about the suitability of this software for any purpose. It is provided "as
12949619f3SDaniel Vetter * is" without express or implied warranty.
13949619f3SDaniel Vetter *
14949619f3SDaniel Vetter * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15949619f3SDaniel Vetter * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16949619f3SDaniel Vetter * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17949619f3SDaniel Vetter * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18949619f3SDaniel Vetter * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19949619f3SDaniel Vetter * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20949619f3SDaniel Vetter * OF THIS SOFTWARE.
21949619f3SDaniel Vetter */
22949619f3SDaniel Vetter
23949619f3SDaniel Vetter #include <linux/export.h>
240500c04eSSam Ravnborg #include <linux/uaccess.h>
250500c04eSSam Ravnborg
260bfd4a01SDhinakaran Pandiyan #include <drm/drm_atomic.h>
270500c04eSSam Ravnborg #include <drm/drm_drv.h>
280500c04eSSam Ravnborg #include <drm/drm_device.h>
290500c04eSSam Ravnborg #include <drm/drm_file.h>
300500c04eSSam Ravnborg #include <drm/drm_mode_object.h>
310500c04eSSam Ravnborg #include <drm/drm_print.h>
32949619f3SDaniel Vetter
33949619f3SDaniel Vetter #include "drm_crtc_internal.h"
34949619f3SDaniel Vetter
35949619f3SDaniel Vetter /*
36949619f3SDaniel Vetter * Internal function to assign a slot in the object idr and optionally
37949619f3SDaniel Vetter * register the object into the idr.
38949619f3SDaniel Vetter */
__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))392135ea7aSThierry Reding int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
402135ea7aSThierry Reding uint32_t obj_type, bool register_obj,
41949619f3SDaniel Vetter void (*obj_free_cb)(struct kref *kref))
42949619f3SDaniel Vetter {
43949619f3SDaniel Vetter int ret;
44949619f3SDaniel Vetter
45e0f32f78SDaniel Vetter WARN_ON(!dev->driver->load && dev->registered && !obj_free_cb);
464f5368b5SDaniel Vetter
47949619f3SDaniel Vetter mutex_lock(&dev->mode_config.idr_mutex);
48b5f06893SShayenne da Luz Moura ret = idr_alloc(&dev->mode_config.object_idr, register_obj ? obj : NULL,
49bbc97f95SShayenne da Luz Moura 1, 0, GFP_KERNEL);
50949619f3SDaniel Vetter if (ret >= 0) {
51949619f3SDaniel Vetter /*
52949619f3SDaniel Vetter * Set up the object linking under the protection of the idr
53949619f3SDaniel Vetter * lock so that other users can't see inconsistent state.
54949619f3SDaniel Vetter */
55949619f3SDaniel Vetter obj->id = ret;
56949619f3SDaniel Vetter obj->type = obj_type;
57949619f3SDaniel Vetter if (obj_free_cb) {
58949619f3SDaniel Vetter obj->free_cb = obj_free_cb;
59949619f3SDaniel Vetter kref_init(&obj->refcount);
60949619f3SDaniel Vetter }
61949619f3SDaniel Vetter }
62949619f3SDaniel Vetter mutex_unlock(&dev->mode_config.idr_mutex);
63949619f3SDaniel Vetter
64949619f3SDaniel Vetter return ret < 0 ? ret : 0;
65949619f3SDaniel Vetter }
66949619f3SDaniel Vetter
67949619f3SDaniel Vetter /**
682135ea7aSThierry Reding * drm_mode_object_add - allocate a new modeset identifier
69949619f3SDaniel Vetter * @dev: DRM device
70949619f3SDaniel Vetter * @obj: object pointer, used to generate unique ID
71949619f3SDaniel Vetter * @obj_type: object type
72949619f3SDaniel Vetter *
73949619f3SDaniel Vetter * Create a unique identifier based on @ptr in @dev's identifier space. Used
742135ea7aSThierry Reding * for tracking modes, CRTCs and connectors.
75949619f3SDaniel Vetter *
76949619f3SDaniel Vetter * Returns:
77949619f3SDaniel Vetter * Zero on success, error code on failure.
78949619f3SDaniel Vetter */
drm_mode_object_add(struct drm_device * dev,struct drm_mode_object * obj,uint32_t obj_type)792135ea7aSThierry Reding int drm_mode_object_add(struct drm_device *dev,
80949619f3SDaniel Vetter struct drm_mode_object *obj, uint32_t obj_type)
81949619f3SDaniel Vetter {
822135ea7aSThierry Reding return __drm_mode_object_add(dev, obj, obj_type, true, NULL);
83949619f3SDaniel Vetter }
84949619f3SDaniel Vetter
drm_mode_object_register(struct drm_device * dev,struct drm_mode_object * obj)85949619f3SDaniel Vetter void drm_mode_object_register(struct drm_device *dev,
86949619f3SDaniel Vetter struct drm_mode_object *obj)
87949619f3SDaniel Vetter {
88949619f3SDaniel Vetter mutex_lock(&dev->mode_config.idr_mutex);
89b5f06893SShayenne da Luz Moura idr_replace(&dev->mode_config.object_idr, obj, obj->id);
90949619f3SDaniel Vetter mutex_unlock(&dev->mode_config.idr_mutex);
91949619f3SDaniel Vetter }
92949619f3SDaniel Vetter
93949619f3SDaniel Vetter /**
940ae865efSCai Huoqing * drm_mode_object_unregister - free a modeset identifier
95949619f3SDaniel Vetter * @dev: DRM device
96949619f3SDaniel Vetter * @object: object to free
97949619f3SDaniel Vetter *
98949619f3SDaniel Vetter * Free @id from @dev's unique identifier pool.
99949619f3SDaniel Vetter * This function can be called multiple times, and guards against
100949619f3SDaniel Vetter * multiple removals.
101949619f3SDaniel Vetter * These modeset identifiers are _not_ reference counted. Hence don't use this
102949619f3SDaniel Vetter * for reference counted modeset objects like framebuffers.
103949619f3SDaniel Vetter */
drm_mode_object_unregister(struct drm_device * dev,struct drm_mode_object * object)104949619f3SDaniel Vetter void drm_mode_object_unregister(struct drm_device *dev,
105949619f3SDaniel Vetter struct drm_mode_object *object)
106949619f3SDaniel Vetter {
107e0f32f78SDaniel Vetter WARN_ON(!dev->driver->load && dev->registered && !object->free_cb);
1084f5368b5SDaniel Vetter
109949619f3SDaniel Vetter mutex_lock(&dev->mode_config.idr_mutex);
110949619f3SDaniel Vetter if (object->id) {
111b5f06893SShayenne da Luz Moura idr_remove(&dev->mode_config.object_idr, object->id);
112949619f3SDaniel Vetter object->id = 0;
113949619f3SDaniel Vetter }
114949619f3SDaniel Vetter mutex_unlock(&dev->mode_config.idr_mutex);
115949619f3SDaniel Vetter }
116949619f3SDaniel Vetter
1177de440dbSKeith Packard /**
118e9d2871fSMauro Carvalho Chehab * drm_mode_object_lease_required - check types which must be leased to be used
1197de440dbSKeith Packard * @type: type of object
1207de440dbSKeith Packard *
1217de440dbSKeith Packard * Returns whether the provided type of drm_mode_object must
1227de440dbSKeith Packard * be owned or leased to be used by a process.
1237de440dbSKeith Packard */
drm_mode_object_lease_required(uint32_t type)12462884cd3SKeith Packard bool drm_mode_object_lease_required(uint32_t type)
1257de440dbSKeith Packard {
1267de440dbSKeith Packard switch(type) {
1277de440dbSKeith Packard case DRM_MODE_OBJECT_CRTC:
1287de440dbSKeith Packard case DRM_MODE_OBJECT_CONNECTOR:
1297de440dbSKeith Packard case DRM_MODE_OBJECT_PLANE:
1307de440dbSKeith Packard return true;
1317de440dbSKeith Packard default:
1327de440dbSKeith Packard return false;
1337de440dbSKeith Packard }
1347de440dbSKeith Packard }
1357de440dbSKeith Packard
__drm_mode_object_find(struct drm_device * dev,struct drm_file * file_priv,uint32_t id,uint32_t type)136949619f3SDaniel Vetter struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
137418da172SKeith Packard struct drm_file *file_priv,
138949619f3SDaniel Vetter uint32_t id, uint32_t type)
139949619f3SDaniel Vetter {
140949619f3SDaniel Vetter struct drm_mode_object *obj = NULL;
141949619f3SDaniel Vetter
142949619f3SDaniel Vetter mutex_lock(&dev->mode_config.idr_mutex);
143b5f06893SShayenne da Luz Moura obj = idr_find(&dev->mode_config.object_idr, id);
144949619f3SDaniel Vetter if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
145949619f3SDaniel Vetter obj = NULL;
146949619f3SDaniel Vetter if (obj && obj->id != id)
147949619f3SDaniel Vetter obj = NULL;
148949619f3SDaniel Vetter
14962884cd3SKeith Packard if (obj && drm_mode_object_lease_required(obj->type) &&
15076afcf5bSSimon Ser !_drm_lease_held(file_priv, obj->id)) {
15176afcf5bSSimon Ser drm_dbg_kms(dev, "[OBJECT:%d] not included in lease", id);
1527de440dbSKeith Packard obj = NULL;
15376afcf5bSSimon Ser }
1547de440dbSKeith Packard
155949619f3SDaniel Vetter if (obj && obj->free_cb) {
156949619f3SDaniel Vetter if (!kref_get_unless_zero(&obj->refcount))
157949619f3SDaniel Vetter obj = NULL;
158949619f3SDaniel Vetter }
159949619f3SDaniel Vetter mutex_unlock(&dev->mode_config.idr_mutex);
160949619f3SDaniel Vetter
161949619f3SDaniel Vetter return obj;
162949619f3SDaniel Vetter }
163949619f3SDaniel Vetter
164949619f3SDaniel Vetter /**
165949619f3SDaniel Vetter * drm_mode_object_find - look up a drm object with static lifetime
166e7e62c7eSDave Airlie * @dev: drm device
167418da172SKeith Packard * @file_priv: drm file
168949619f3SDaniel Vetter * @id: id of the mode object
169949619f3SDaniel Vetter * @type: type of the mode object
170949619f3SDaniel Vetter *
171949619f3SDaniel Vetter * This function is used to look up a modeset object. It will acquire a
172949619f3SDaniel Vetter * reference for reference counted objects. This reference must be dropped again
173020a218fSThierry Reding * by callind drm_mode_object_put().
174949619f3SDaniel Vetter */
drm_mode_object_find(struct drm_device * dev,struct drm_file * file_priv,uint32_t id,uint32_t type)175949619f3SDaniel Vetter struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
176418da172SKeith Packard struct drm_file *file_priv,
177949619f3SDaniel Vetter uint32_t id, uint32_t type)
178949619f3SDaniel Vetter {
179949619f3SDaniel Vetter struct drm_mode_object *obj = NULL;
180949619f3SDaniel Vetter
181418da172SKeith Packard obj = __drm_mode_object_find(dev, file_priv, id, type);
182949619f3SDaniel Vetter return obj;
183949619f3SDaniel Vetter }
184949619f3SDaniel Vetter EXPORT_SYMBOL(drm_mode_object_find);
185949619f3SDaniel Vetter
186949619f3SDaniel Vetter /**
187020a218fSThierry Reding * drm_mode_object_put - release a mode object reference
188020a218fSThierry Reding * @obj: DRM mode object
189949619f3SDaniel Vetter *
190a2511a55SDaniel Vetter * This function decrements the object's refcount if it is a refcounted modeset
191949619f3SDaniel Vetter * object. It is a no-op on any other object. This is used to drop references
192020a218fSThierry Reding * acquired with drm_mode_object_get().
193949619f3SDaniel Vetter */
drm_mode_object_put(struct drm_mode_object * obj)194020a218fSThierry Reding void drm_mode_object_put(struct drm_mode_object *obj)
195949619f3SDaniel Vetter {
196949619f3SDaniel Vetter if (obj->free_cb) {
1972c935bc5SPeter Zijlstra DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
198949619f3SDaniel Vetter kref_put(&obj->refcount, obj->free_cb);
199949619f3SDaniel Vetter }
200949619f3SDaniel Vetter }
201020a218fSThierry Reding EXPORT_SYMBOL(drm_mode_object_put);
202949619f3SDaniel Vetter
203949619f3SDaniel Vetter /**
204020a218fSThierry Reding * drm_mode_object_get - acquire a mode object reference
205020a218fSThierry Reding * @obj: DRM mode object
206949619f3SDaniel Vetter *
207a2511a55SDaniel Vetter * This function increments the object's refcount if it is a refcounted modeset
208949619f3SDaniel Vetter * object. It is a no-op on any other object. References should be dropped again
209020a218fSThierry Reding * by calling drm_mode_object_put().
210949619f3SDaniel Vetter */
drm_mode_object_get(struct drm_mode_object * obj)211020a218fSThierry Reding void drm_mode_object_get(struct drm_mode_object *obj)
212949619f3SDaniel Vetter {
213949619f3SDaniel Vetter if (obj->free_cb) {
2142c935bc5SPeter Zijlstra DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
215949619f3SDaniel Vetter kref_get(&obj->refcount);
216949619f3SDaniel Vetter }
217949619f3SDaniel Vetter }
218020a218fSThierry Reding EXPORT_SYMBOL(drm_mode_object_get);
219949619f3SDaniel Vetter
220949619f3SDaniel Vetter /**
221949619f3SDaniel Vetter * drm_object_attach_property - attach a property to a modeset object
222949619f3SDaniel Vetter * @obj: drm modeset object
223949619f3SDaniel Vetter * @property: property to attach
224949619f3SDaniel Vetter * @init_val: initial value of the property
225949619f3SDaniel Vetter *
226949619f3SDaniel Vetter * This attaches the given property to the modeset object with the given initial
227949619f3SDaniel Vetter * value. Currently this function cannot fail since the properties are stored in
228949619f3SDaniel Vetter * a statically sized array.
229ab4e6933SDaniel Vetter *
230ab4e6933SDaniel Vetter * Note that all properties must be attached before the object itself is
231ab4e6933SDaniel Vetter * registered and accessible from userspace.
232949619f3SDaniel Vetter */
drm_object_attach_property(struct drm_mode_object * obj,struct drm_property * property,uint64_t init_val)233949619f3SDaniel Vetter void drm_object_attach_property(struct drm_mode_object *obj,
234949619f3SDaniel Vetter struct drm_property *property,
235949619f3SDaniel Vetter uint64_t init_val)
236949619f3SDaniel Vetter {
237949619f3SDaniel Vetter int count = obj->properties->count;
238ab4e6933SDaniel Vetter struct drm_device *dev = property->dev;
239ab4e6933SDaniel Vetter
240ab4e6933SDaniel Vetter
241ab4e6933SDaniel Vetter if (obj->type == DRM_MODE_OBJECT_CONNECTOR) {
242ab4e6933SDaniel Vetter struct drm_connector *connector = obj_to_connector(obj);
243ab4e6933SDaniel Vetter
244ab4e6933SDaniel Vetter WARN_ON(!dev->driver->load &&
245ab4e6933SDaniel Vetter connector->registration_state == DRM_CONNECTOR_REGISTERED);
246ab4e6933SDaniel Vetter } else {
247ab4e6933SDaniel Vetter WARN_ON(!dev->driver->load && dev->registered);
248ab4e6933SDaniel Vetter }
249949619f3SDaniel Vetter
250949619f3SDaniel Vetter if (count == DRM_OBJECT_MAX_PROPERTY) {
251949619f3SDaniel Vetter WARN(1, "Failed to attach object property (type: 0x%x). Please "
252949619f3SDaniel Vetter "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
253949619f3SDaniel Vetter "you see this message on the same object type.\n",
254949619f3SDaniel Vetter obj->type);
255949619f3SDaniel Vetter return;
256949619f3SDaniel Vetter }
257949619f3SDaniel Vetter
258949619f3SDaniel Vetter obj->properties->properties[count] = property;
259949619f3SDaniel Vetter obj->properties->values[count] = init_val;
260949619f3SDaniel Vetter obj->properties->count++;
261949619f3SDaniel Vetter }
262949619f3SDaniel Vetter EXPORT_SYMBOL(drm_object_attach_property);
263949619f3SDaniel Vetter
264949619f3SDaniel Vetter /**
265949619f3SDaniel Vetter * drm_object_property_set_value - set the value of a property
266949619f3SDaniel Vetter * @obj: drm mode object to set property value for
267949619f3SDaniel Vetter * @property: property to set
268949619f3SDaniel Vetter * @val: value the property should be set to
269949619f3SDaniel Vetter *
270a2511a55SDaniel Vetter * This function sets a given property on a given object. This function only
271949619f3SDaniel Vetter * changes the software state of the property, it does not call into the
272949619f3SDaniel Vetter * driver's ->set_property callback.
273949619f3SDaniel Vetter *
274a2511a55SDaniel Vetter * Note that atomic drivers should not have any need to call this, the core will
275a2511a55SDaniel Vetter * ensure consistency of values reported back to userspace through the
276a2511a55SDaniel Vetter * appropriate ->atomic_get_property callback. Only legacy drivers should call
277a2511a55SDaniel Vetter * this function to update the tracked value (after clamping and other
278a2511a55SDaniel Vetter * restrictions have been applied).
279a2511a55SDaniel Vetter *
280949619f3SDaniel Vetter * Returns:
281949619f3SDaniel Vetter * Zero on success, error code on failure.
282949619f3SDaniel Vetter */
drm_object_property_set_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t val)283949619f3SDaniel Vetter int drm_object_property_set_value(struct drm_mode_object *obj,
284949619f3SDaniel Vetter struct drm_property *property, uint64_t val)
285949619f3SDaniel Vetter {
286949619f3SDaniel Vetter int i;
287949619f3SDaniel Vetter
2884a97a3daSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(property->dev) &&
2894a97a3daSDaniel Vetter !(property->flags & DRM_MODE_PROP_IMMUTABLE));
2904a97a3daSDaniel Vetter
291949619f3SDaniel Vetter for (i = 0; i < obj->properties->count; i++) {
292949619f3SDaniel Vetter if (obj->properties->properties[i] == property) {
293949619f3SDaniel Vetter obj->properties->values[i] = val;
294949619f3SDaniel Vetter return 0;
295949619f3SDaniel Vetter }
296949619f3SDaniel Vetter }
297949619f3SDaniel Vetter
298949619f3SDaniel Vetter return -EINVAL;
299949619f3SDaniel Vetter }
300949619f3SDaniel Vetter EXPORT_SYMBOL(drm_object_property_set_value);
301949619f3SDaniel Vetter
__drm_object_property_get_prop_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t * val)302adf47b75SDave Stevenson static int __drm_object_property_get_prop_value(struct drm_mode_object *obj,
3038a50b9bdSVille Syrjälä struct drm_property *property,
3048a50b9bdSVille Syrjälä uint64_t *val)
305949619f3SDaniel Vetter {
306949619f3SDaniel Vetter int i;
307949619f3SDaniel Vetter
308adf47b75SDave Stevenson for (i = 0; i < obj->properties->count; i++) {
309adf47b75SDave Stevenson if (obj->properties->properties[i] == property) {
310adf47b75SDave Stevenson *val = obj->properties->values[i];
311adf47b75SDave Stevenson return 0;
312adf47b75SDave Stevenson }
313adf47b75SDave Stevenson }
314adf47b75SDave Stevenson
315adf47b75SDave Stevenson return -EINVAL;
316adf47b75SDave Stevenson }
317adf47b75SDave Stevenson
__drm_object_property_get_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t * val)318adf47b75SDave Stevenson static int __drm_object_property_get_value(struct drm_mode_object *obj,
319adf47b75SDave Stevenson struct drm_property *property,
320adf47b75SDave Stevenson uint64_t *val)
321adf47b75SDave Stevenson {
322adf47b75SDave Stevenson
323949619f3SDaniel Vetter /* read-only properties bypass atomic mechanism and still store
324949619f3SDaniel Vetter * their value in obj->properties->values[].. mostly to avoid
325949619f3SDaniel Vetter * having to deal w/ EDID and similar props in atomic paths:
326949619f3SDaniel Vetter */
3270bfd4a01SDhinakaran Pandiyan if (drm_drv_uses_atomic_modeset(property->dev) &&
328949619f3SDaniel Vetter !(property->flags & DRM_MODE_PROP_IMMUTABLE))
329949619f3SDaniel Vetter return drm_atomic_get_property(obj, property, val);
330949619f3SDaniel Vetter
331adf47b75SDave Stevenson return __drm_object_property_get_prop_value(obj, property, val);
332949619f3SDaniel Vetter }
3334a97a3daSDaniel Vetter
3344a97a3daSDaniel Vetter /**
3354a97a3daSDaniel Vetter * drm_object_property_get_value - retrieve the value of a property
3364a97a3daSDaniel Vetter * @obj: drm mode object to get property value from
3374a97a3daSDaniel Vetter * @property: property to retrieve
3384a97a3daSDaniel Vetter * @val: storage for the property value
3394a97a3daSDaniel Vetter *
3404a97a3daSDaniel Vetter * This function retrieves the softare state of the given property for the given
3414a97a3daSDaniel Vetter * property. Since there is no driver callback to retrieve the current property
3424a97a3daSDaniel Vetter * value this might be out of sync with the hardware, depending upon the driver
3434a97a3daSDaniel Vetter * and property.
3444a97a3daSDaniel Vetter *
3454a97a3daSDaniel Vetter * Atomic drivers should never call this function directly, the core will read
3464a97a3daSDaniel Vetter * out property values through the various ->atomic_get_property callbacks.
3474a97a3daSDaniel Vetter *
3484a97a3daSDaniel Vetter * Returns:
3494a97a3daSDaniel Vetter * Zero on success, error code on failure.
3504a97a3daSDaniel Vetter */
drm_object_property_get_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t * val)3514a97a3daSDaniel Vetter int drm_object_property_get_value(struct drm_mode_object *obj,
3524a97a3daSDaniel Vetter struct drm_property *property, uint64_t *val)
3534a97a3daSDaniel Vetter {
3544a97a3daSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(property->dev));
3554a97a3daSDaniel Vetter
3564a97a3daSDaniel Vetter return __drm_object_property_get_value(obj, property, val);
3574a97a3daSDaniel Vetter }
358949619f3SDaniel Vetter EXPORT_SYMBOL(drm_object_property_get_value);
359949619f3SDaniel Vetter
360adf47b75SDave Stevenson /**
361adf47b75SDave Stevenson * drm_object_property_get_default_value - retrieve the default value of a
362adf47b75SDave Stevenson * property when in atomic mode.
363adf47b75SDave Stevenson * @obj: drm mode object to get property value from
364adf47b75SDave Stevenson * @property: property to retrieve
365adf47b75SDave Stevenson * @val: storage for the property value
366adf47b75SDave Stevenson *
367adf47b75SDave Stevenson * This function retrieves the default state of the given property as passed in
368adf47b75SDave Stevenson * to drm_object_attach_property
369adf47b75SDave Stevenson *
370adf47b75SDave Stevenson * Only atomic drivers should call this function directly, as for non-atomic
371adf47b75SDave Stevenson * drivers it will return the current value.
372adf47b75SDave Stevenson *
373adf47b75SDave Stevenson * Returns:
374adf47b75SDave Stevenson * Zero on success, error code on failure.
375adf47b75SDave Stevenson */
drm_object_property_get_default_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t * val)376adf47b75SDave Stevenson int drm_object_property_get_default_value(struct drm_mode_object *obj,
377adf47b75SDave Stevenson struct drm_property *property,
378adf47b75SDave Stevenson uint64_t *val)
379adf47b75SDave Stevenson {
380adf47b75SDave Stevenson WARN_ON(!drm_drv_uses_atomic_modeset(property->dev));
381adf47b75SDave Stevenson
382adf47b75SDave Stevenson return __drm_object_property_get_prop_value(obj, property, val);
383adf47b75SDave Stevenson }
384adf47b75SDave Stevenson EXPORT_SYMBOL(drm_object_property_get_default_value);
385adf47b75SDave Stevenson
386949619f3SDaniel Vetter /* helper for getconnector and getproperties ioctls */
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)387949619f3SDaniel Vetter int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
388949619f3SDaniel Vetter uint32_t __user *prop_ptr,
389949619f3SDaniel Vetter uint64_t __user *prop_values,
390949619f3SDaniel Vetter uint32_t *arg_count_props)
391949619f3SDaniel Vetter {
392f094d881SDaniel Vetter int i, ret, count;
393949619f3SDaniel Vetter
394f094d881SDaniel Vetter for (i = 0, count = 0; i < obj->properties->count; i++) {
395949619f3SDaniel Vetter struct drm_property *prop = obj->properties->properties[i];
396949619f3SDaniel Vetter uint64_t val;
397949619f3SDaniel Vetter
398949619f3SDaniel Vetter if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
399949619f3SDaniel Vetter continue;
400949619f3SDaniel Vetter
401f094d881SDaniel Vetter if (*arg_count_props > count) {
4024a97a3daSDaniel Vetter ret = __drm_object_property_get_value(obj, prop, &val);
403949619f3SDaniel Vetter if (ret)
404949619f3SDaniel Vetter return ret;
405949619f3SDaniel Vetter
406f094d881SDaniel Vetter if (put_user(prop->base.id, prop_ptr + count))
407949619f3SDaniel Vetter return -EFAULT;
408949619f3SDaniel Vetter
409f094d881SDaniel Vetter if (put_user(val, prop_values + count))
410949619f3SDaniel Vetter return -EFAULT;
411f094d881SDaniel Vetter }
412949619f3SDaniel Vetter
413f094d881SDaniel Vetter count++;
414949619f3SDaniel Vetter }
415f094d881SDaniel Vetter *arg_count_props = count;
416949619f3SDaniel Vetter
417949619f3SDaniel Vetter return 0;
418949619f3SDaniel Vetter }
419949619f3SDaniel Vetter
420949619f3SDaniel Vetter /**
421949619f3SDaniel Vetter * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
422949619f3SDaniel Vetter * @dev: DRM device
423949619f3SDaniel Vetter * @data: ioctl data
424949619f3SDaniel Vetter * @file_priv: DRM file info
425949619f3SDaniel Vetter *
426949619f3SDaniel Vetter * This function retrieves the current value for an object's property. Compared
427949619f3SDaniel Vetter * to the connector specific ioctl this one is extended to also work on crtc and
428949619f3SDaniel Vetter * plane objects.
429949619f3SDaniel Vetter *
430949619f3SDaniel Vetter * Called by the user via ioctl.
431949619f3SDaniel Vetter *
432949619f3SDaniel Vetter * Returns:
433949619f3SDaniel Vetter * Zero on success, negative errno on failure.
434949619f3SDaniel Vetter */
drm_mode_obj_get_properties_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)435949619f3SDaniel Vetter int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
436949619f3SDaniel Vetter struct drm_file *file_priv)
437949619f3SDaniel Vetter {
438949619f3SDaniel Vetter struct drm_mode_obj_get_properties *arg = data;
439949619f3SDaniel Vetter struct drm_mode_object *obj;
4409bcaa3feSMichal Orzel struct drm_modeset_acquire_ctx ctx;
441949619f3SDaniel Vetter int ret = 0;
442949619f3SDaniel Vetter
443949619f3SDaniel Vetter if (!drm_core_check_feature(dev, DRIVER_MODESET))
44469fdf420SChris Wilson return -EOPNOTSUPP;
445949619f3SDaniel Vetter
4469bcaa3feSMichal Orzel DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
447949619f3SDaniel Vetter
448418da172SKeith Packard obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
449949619f3SDaniel Vetter if (!obj) {
450949619f3SDaniel Vetter ret = -ENOENT;
451949619f3SDaniel Vetter goto out;
452949619f3SDaniel Vetter }
453949619f3SDaniel Vetter if (!obj->properties) {
454949619f3SDaniel Vetter ret = -EINVAL;
455949619f3SDaniel Vetter goto out_unref;
456949619f3SDaniel Vetter }
457949619f3SDaniel Vetter
458949619f3SDaniel Vetter ret = drm_mode_object_get_properties(obj, file_priv->atomic,
459949619f3SDaniel Vetter (uint32_t __user *)(unsigned long)(arg->props_ptr),
460949619f3SDaniel Vetter (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
461949619f3SDaniel Vetter &arg->count_props);
462949619f3SDaniel Vetter
463949619f3SDaniel Vetter out_unref:
464020a218fSThierry Reding drm_mode_object_put(obj);
465949619f3SDaniel Vetter out:
46677ef3857SDaniel Vetter DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
467949619f3SDaniel Vetter return ret;
468949619f3SDaniel Vetter }
469949619f3SDaniel Vetter
drm_mode_obj_find_prop_id(struct drm_mode_object * obj,uint32_t prop_id)470f92f053bSMaarten Lankhorst struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj,
471f92f053bSMaarten Lankhorst uint32_t prop_id)
472f92f053bSMaarten Lankhorst {
473f92f053bSMaarten Lankhorst int i;
474f92f053bSMaarten Lankhorst
475f92f053bSMaarten Lankhorst for (i = 0; i < obj->properties->count; i++)
476f92f053bSMaarten Lankhorst if (obj->properties->properties[i]->base.id == prop_id)
477f92f053bSMaarten Lankhorst return obj->properties->properties[i];
478f92f053bSMaarten Lankhorst
479f92f053bSMaarten Lankhorst return NULL;
480f92f053bSMaarten Lankhorst }
481*c6d219fbSMaxime Ripard EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_mode_obj_find_prop_id);
482f92f053bSMaarten Lankhorst
set_property_legacy(struct drm_mode_object * obj,struct drm_property * prop,uint64_t prop_value)483144a7999SDaniel Vetter static int set_property_legacy(struct drm_mode_object *obj,
484144a7999SDaniel Vetter struct drm_property *prop,
485144a7999SDaniel Vetter uint64_t prop_value)
486144a7999SDaniel Vetter {
487144a7999SDaniel Vetter struct drm_device *dev = prop->dev;
488144a7999SDaniel Vetter struct drm_mode_object *ref;
4899bcaa3feSMichal Orzel struct drm_modeset_acquire_ctx ctx;
490144a7999SDaniel Vetter int ret = -EINVAL;
491144a7999SDaniel Vetter
492144a7999SDaniel Vetter if (!drm_property_change_valid_get(prop, prop_value, &ref))
493144a7999SDaniel Vetter return -EINVAL;
494144a7999SDaniel Vetter
4959bcaa3feSMichal Orzel DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
496144a7999SDaniel Vetter switch (obj->type) {
497144a7999SDaniel Vetter case DRM_MODE_OBJECT_CONNECTOR:
49897e14fbeSDaniel Vetter ret = drm_connector_set_obj_prop(obj, prop, prop_value);
499144a7999SDaniel Vetter break;
500144a7999SDaniel Vetter case DRM_MODE_OBJECT_CRTC:
501144a7999SDaniel Vetter ret = drm_mode_crtc_set_obj_prop(obj, prop, prop_value);
502144a7999SDaniel Vetter break;
503144a7999SDaniel Vetter case DRM_MODE_OBJECT_PLANE:
504144a7999SDaniel Vetter ret = drm_mode_plane_set_obj_prop(obj_to_plane(obj),
505144a7999SDaniel Vetter prop, prop_value);
506144a7999SDaniel Vetter break;
507144a7999SDaniel Vetter }
508144a7999SDaniel Vetter drm_property_change_valid_put(prop, ref);
50977ef3857SDaniel Vetter DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
510144a7999SDaniel Vetter
511144a7999SDaniel Vetter return ret;
512144a7999SDaniel Vetter }
513144a7999SDaniel Vetter
set_property_atomic(struct drm_mode_object * obj,struct drm_file * file_priv,struct drm_property * prop,uint64_t prop_value)514144a7999SDaniel Vetter static int set_property_atomic(struct drm_mode_object *obj,
51536e4523aSDaniel Vetter struct drm_file *file_priv,
516144a7999SDaniel Vetter struct drm_property *prop,
517144a7999SDaniel Vetter uint64_t prop_value)
518144a7999SDaniel Vetter {
519144a7999SDaniel Vetter struct drm_device *dev = prop->dev;
520144a7999SDaniel Vetter struct drm_atomic_state *state;
521144a7999SDaniel Vetter struct drm_modeset_acquire_ctx ctx;
522144a7999SDaniel Vetter int ret;
523144a7999SDaniel Vetter
524144a7999SDaniel Vetter state = drm_atomic_state_alloc(dev);
525144a7999SDaniel Vetter if (!state)
526144a7999SDaniel Vetter return -ENOMEM;
527227ad6d9SChris Wilson
528227ad6d9SChris Wilson drm_modeset_acquire_init(&ctx, 0);
529144a7999SDaniel Vetter state->acquire_ctx = &ctx;
530227ad6d9SChris Wilson
531144a7999SDaniel Vetter retry:
532144a7999SDaniel Vetter if (prop == state->dev->mode_config.dpms_property) {
533144a7999SDaniel Vetter if (obj->type != DRM_MODE_OBJECT_CONNECTOR) {
534144a7999SDaniel Vetter ret = -EINVAL;
535144a7999SDaniel Vetter goto out;
536144a7999SDaniel Vetter }
537144a7999SDaniel Vetter
538144a7999SDaniel Vetter ret = drm_atomic_connector_commit_dpms(state,
539144a7999SDaniel Vetter obj_to_connector(obj),
540144a7999SDaniel Vetter prop_value);
541144a7999SDaniel Vetter } else {
5420e26cc72SAndré Almeida ret = drm_atomic_set_property(state, file_priv, obj, prop, prop_value, false);
543144a7999SDaniel Vetter if (ret)
544144a7999SDaniel Vetter goto out;
545144a7999SDaniel Vetter ret = drm_atomic_commit(state);
546144a7999SDaniel Vetter }
547144a7999SDaniel Vetter out:
548144a7999SDaniel Vetter if (ret == -EDEADLK) {
549144a7999SDaniel Vetter drm_atomic_state_clear(state);
550144a7999SDaniel Vetter drm_modeset_backoff(&ctx);
551144a7999SDaniel Vetter goto retry;
552144a7999SDaniel Vetter }
553144a7999SDaniel Vetter
554144a7999SDaniel Vetter drm_atomic_state_put(state);
555144a7999SDaniel Vetter
556144a7999SDaniel Vetter drm_modeset_drop_locks(&ctx);
557144a7999SDaniel Vetter drm_modeset_acquire_fini(&ctx);
558144a7999SDaniel Vetter
559144a7999SDaniel Vetter return ret;
560144a7999SDaniel Vetter }
561144a7999SDaniel Vetter
drm_mode_obj_set_property_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)562949619f3SDaniel Vetter int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
563949619f3SDaniel Vetter struct drm_file *file_priv)
564949619f3SDaniel Vetter {
565949619f3SDaniel Vetter struct drm_mode_obj_set_property *arg = data;
566949619f3SDaniel Vetter struct drm_mode_object *arg_obj;
567949619f3SDaniel Vetter struct drm_property *property;
568f92f053bSMaarten Lankhorst int ret = -EINVAL;
569949619f3SDaniel Vetter
570949619f3SDaniel Vetter if (!drm_core_check_feature(dev, DRIVER_MODESET))
57169fdf420SChris Wilson return -EOPNOTSUPP;
572949619f3SDaniel Vetter
573418da172SKeith Packard arg_obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
574144a7999SDaniel Vetter if (!arg_obj)
575144a7999SDaniel Vetter return -ENOENT;
576f92f053bSMaarten Lankhorst
577949619f3SDaniel Vetter if (!arg_obj->properties)
578949619f3SDaniel Vetter goto out_unref;
579949619f3SDaniel Vetter
580f92f053bSMaarten Lankhorst property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
581f92f053bSMaarten Lankhorst if (!property)
582949619f3SDaniel Vetter goto out_unref;
583949619f3SDaniel Vetter
584144a7999SDaniel Vetter if (drm_drv_uses_atomic_modeset(property->dev))
58536e4523aSDaniel Vetter ret = set_property_atomic(arg_obj, file_priv, property, arg->value);
586144a7999SDaniel Vetter else
587144a7999SDaniel Vetter ret = set_property_legacy(arg_obj, property, arg->value);
588949619f3SDaniel Vetter
589949619f3SDaniel Vetter out_unref:
590020a218fSThierry Reding drm_mode_object_put(arg_obj);
591949619f3SDaniel Vetter return ret;
592949619f3SDaniel Vetter }
593