3 * drm_sysfs.c - Modifications to drm_sysfs_class.c to support
4 * extra sysfs attribute from DRM. Normal drm_sysfs_class
5 * does not allow adding attributes.
7 * Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com>
8 * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
9 * Copyright (c) 2003-2004 IBM Corp.
11 * This file is released under the GPLv2
15 #include <linux/device.h>
16 #include <linux/kdev_t.h>
17 #include <linux/err.h>
22 #define to_drm_minor(d) container_of(d, struct drm_minor, kdev)
23 #define to_drm_connector(d) container_of(d, struct drm_connector, kdev)
26 * drm_sysfs_suspend - DRM class suspend hook
27 * @dev: Linux device to suspend
28 * @state: power state to enter
30 * Just figures out what the actual struct drm_device associated with
31 * @dev is and calls its suspend hook, if present.
33 static int drm_sysfs_suspend(struct device
*dev
, pm_message_t state
)
35 struct drm_minor
*drm_minor
= to_drm_minor(dev
);
36 struct drm_device
*drm_dev
= drm_minor
->dev
;
38 if (drm_minor
->type
== DRM_MINOR_LEGACY
&&
39 !drm_core_check_feature(drm_dev
, DRIVER_MODESET
) &&
40 drm_dev
->driver
->suspend
)
41 return drm_dev
->driver
->suspend(drm_dev
, state
);
47 * drm_sysfs_resume - DRM class resume hook
48 * @dev: Linux device to resume
50 * Just figures out what the actual struct drm_device associated with
51 * @dev is and calls its resume hook, if present.
53 static int drm_sysfs_resume(struct device
*dev
)
55 struct drm_minor
*drm_minor
= to_drm_minor(dev
);
56 struct drm_device
*drm_dev
= drm_minor
->dev
;
58 if (drm_minor
->type
== DRM_MINOR_LEGACY
&&
59 !drm_core_check_feature(drm_dev
, DRIVER_MODESET
) &&
60 drm_dev
->driver
->resume
)
61 return drm_dev
->driver
->resume(drm_dev
);
66 /* Display the version of drm_core. This doesn't work right in current design */
67 static ssize_t
version_show(struct class *dev
, char *buf
)
69 return sprintf(buf
, "%s %d.%d.%d %s\n", CORE_NAME
, CORE_MAJOR
,
70 CORE_MINOR
, CORE_PATCHLEVEL
, CORE_DATE
);
73 static CLASS_ATTR(version
, S_IRUGO
, version_show
, NULL
);
76 * drm_sysfs_create - create a struct drm_sysfs_class structure
77 * @owner: pointer to the module that is to "own" this struct drm_sysfs_class
78 * @name: pointer to a string for the name of this class.
80 * This is used to create DRM class pointer that can then be used
81 * in calls to drm_sysfs_device_add().
83 * Note, the pointer created here is to be destroyed when finished by making a
84 * call to drm_sysfs_destroy().
86 struct class *drm_sysfs_create(struct module
*owner
, char *name
)
91 class = class_create(owner
, name
);
97 class->suspend
= drm_sysfs_suspend
;
98 class->resume
= drm_sysfs_resume
;
100 err
= class_create_file(class, &class_attr_version
);
107 class_destroy(class);
113 * drm_sysfs_destroy - destroys DRM class
115 * Destroy the DRM device class.
117 void drm_sysfs_destroy(void)
119 if ((drm_class
== NULL
) || (IS_ERR(drm_class
)))
121 class_remove_file(drm_class
, &class_attr_version
);
122 class_destroy(drm_class
);
126 * drm_sysfs_device_release - do nothing
129 * Normally, this would free the DRM device associated with @dev, along
130 * with cleaning up any other stuff. But we do that in the DRM core, so
131 * this function can just return and hope that the core does its job.
133 static void drm_sysfs_device_release(struct device
*dev
)
139 * Connector properties
141 static ssize_t
status_show(struct device
*device
,
142 struct device_attribute
*attr
,
145 struct drm_connector
*connector
= to_drm_connector(device
);
146 enum drm_connector_status status
;
148 status
= connector
->funcs
->detect(connector
);
149 return snprintf(buf
, PAGE_SIZE
, "%s",
150 drm_get_connector_status_name(status
));
153 static ssize_t
dpms_show(struct device
*device
,
154 struct device_attribute
*attr
,
157 struct drm_connector
*connector
= to_drm_connector(device
);
158 struct drm_device
*dev
= connector
->dev
;
159 uint64_t dpms_status
;
162 ret
= drm_connector_property_get_value(connector
,
163 dev
->mode_config
.dpms_property
,
168 return snprintf(buf
, PAGE_SIZE
, "%s",
169 drm_get_dpms_name((int)dpms_status
));
172 static ssize_t
enabled_show(struct device
*device
,
173 struct device_attribute
*attr
,
176 struct drm_connector
*connector
= to_drm_connector(device
);
178 return snprintf(buf
, PAGE_SIZE
, connector
->encoder
? "enabled" :
182 static ssize_t
edid_show(struct kobject
*kobj
, struct bin_attribute
*attr
,
183 char *buf
, loff_t off
, size_t count
)
185 struct device
*connector_dev
= container_of(kobj
, struct device
, kobj
);
186 struct drm_connector
*connector
= to_drm_connector(connector_dev
);
190 if (!connector
->edid_blob_ptr
)
193 edid
= connector
->edid_blob_ptr
->data
;
194 size
= connector
->edid_blob_ptr
->length
;
201 if (off
+ count
> size
)
203 memcpy(buf
, edid
+ off
, count
);
208 static ssize_t
modes_show(struct device
*device
,
209 struct device_attribute
*attr
,
212 struct drm_connector
*connector
= to_drm_connector(device
);
213 struct drm_display_mode
*mode
;
216 list_for_each_entry(mode
, &connector
->modes
, head
) {
217 written
+= snprintf(buf
+ written
, PAGE_SIZE
- written
, "%s\n",
224 static ssize_t
subconnector_show(struct device
*device
,
225 struct device_attribute
*attr
,
228 struct drm_connector
*connector
= to_drm_connector(device
);
229 struct drm_device
*dev
= connector
->dev
;
230 struct drm_property
*prop
= NULL
;
231 uint64_t subconnector
;
235 switch (connector
->connector_type
) {
236 case DRM_MODE_CONNECTOR_DVII
:
237 prop
= dev
->mode_config
.dvi_i_subconnector_property
;
239 case DRM_MODE_CONNECTOR_Composite
:
240 case DRM_MODE_CONNECTOR_SVIDEO
:
241 case DRM_MODE_CONNECTOR_Component
:
242 prop
= dev
->mode_config
.tv_subconnector_property
;
246 DRM_ERROR("Wrong connector type for this property\n");
251 DRM_ERROR("Unable to find subconnector property\n");
255 ret
= drm_connector_property_get_value(connector
, prop
, &subconnector
);
259 return snprintf(buf
, PAGE_SIZE
, "%s", is_tv
?
260 drm_get_tv_subconnector_name((int)subconnector
) :
261 drm_get_dvi_i_subconnector_name((int)subconnector
));
264 static ssize_t
select_subconnector_show(struct device
*device
,
265 struct device_attribute
*attr
,
268 struct drm_connector
*connector
= to_drm_connector(device
);
269 struct drm_device
*dev
= connector
->dev
;
270 struct drm_property
*prop
= NULL
;
271 uint64_t subconnector
;
275 switch (connector
->connector_type
) {
276 case DRM_MODE_CONNECTOR_DVII
:
277 prop
= dev
->mode_config
.dvi_i_select_subconnector_property
;
279 case DRM_MODE_CONNECTOR_Composite
:
280 case DRM_MODE_CONNECTOR_SVIDEO
:
281 case DRM_MODE_CONNECTOR_Component
:
282 prop
= dev
->mode_config
.tv_select_subconnector_property
;
286 DRM_ERROR("Wrong connector type for this property\n");
291 DRM_ERROR("Unable to find select subconnector property\n");
295 ret
= drm_connector_property_get_value(connector
, prop
, &subconnector
);
299 return snprintf(buf
, PAGE_SIZE
, "%s", is_tv
?
300 drm_get_tv_select_name((int)subconnector
) :
301 drm_get_dvi_i_select_name((int)subconnector
));
304 static struct device_attribute connector_attrs
[] = {
311 /* These attributes are for both DVI-I connectors and all types of tv-out. */
312 static struct device_attribute connector_attrs_opt1
[] = {
313 __ATTR_RO(subconnector
),
314 __ATTR_RO(select_subconnector
),
317 static struct bin_attribute edid_attr
= {
324 * drm_sysfs_connector_add - add an connector to sysfs
325 * @connector: connector to add
327 * Create an connector device in sysfs, along with its associated connector
328 * properties (so far, connection status, dpms, mode list & edid) and
329 * generate a hotplug event so userspace knows there's a new connector
333 * This routine should only be called *once* for each DRM minor registered.
334 * A second call for an already registered device will trigger the BUG_ON
337 int drm_sysfs_connector_add(struct drm_connector
*connector
)
339 struct drm_device
*dev
= connector
->dev
;
342 /* We shouldn't get called more than once for the same connector */
343 BUG_ON(device_is_registered(&connector
->kdev
));
345 connector
->kdev
.parent
= &dev
->primary
->kdev
;
346 connector
->kdev
.class = drm_class
;
347 connector
->kdev
.release
= drm_sysfs_device_release
;
349 DRM_DEBUG("adding \"%s\" to sysfs\n",
350 drm_get_connector_name(connector
));
352 dev_set_name(&connector
->kdev
, "card%d-%s",
353 dev
->primary
->index
, drm_get_connector_name(connector
));
354 ret
= device_register(&connector
->kdev
);
357 DRM_ERROR("failed to register connector device: %d\n", ret
);
361 /* Standard attributes */
363 for (i
= 0; i
< ARRAY_SIZE(connector_attrs
); i
++) {
364 ret
= device_create_file(&connector
->kdev
, &connector_attrs
[i
]);
369 /* Optional attributes */
371 * In the long run it maybe a good idea to make one set of
372 * optionals per connector type.
374 switch (connector
->connector_type
) {
375 case DRM_MODE_CONNECTOR_DVII
:
376 case DRM_MODE_CONNECTOR_Composite
:
377 case DRM_MODE_CONNECTOR_SVIDEO
:
378 case DRM_MODE_CONNECTOR_Component
:
379 for (i
= 0; i
< ARRAY_SIZE(connector_attrs_opt1
); i
++) {
380 ret
= device_create_file(&connector
->kdev
, &connector_attrs_opt1
[i
]);
389 ret
= sysfs_create_bin_file(&connector
->kdev
.kobj
, &edid_attr
);
393 /* Let userspace know we have a new connector */
394 drm_sysfs_hotplug_event(dev
);
400 for (j
= 0; j
< i
; j
++)
401 device_remove_file(&connector
->kdev
,
402 &connector_attrs
[i
]);
403 device_unregister(&connector
->kdev
);
408 EXPORT_SYMBOL(drm_sysfs_connector_add
);
411 * drm_sysfs_connector_remove - remove an connector device from sysfs
412 * @connector: connector to remove
414 * Remove @connector and its associated attributes from sysfs. Note that
415 * the device model core will take care of sending the "remove" uevent
416 * at this time, so we don't need to do it.
419 * This routine should only be called if the connector was previously
420 * successfully registered. If @connector hasn't been registered yet,
421 * you'll likely see a panic somewhere deep in sysfs code when called.
423 void drm_sysfs_connector_remove(struct drm_connector
*connector
)
427 DRM_DEBUG("removing \"%s\" from sysfs\n",
428 drm_get_connector_name(connector
));
430 for (i
= 0; i
< ARRAY_SIZE(connector_attrs
); i
++)
431 device_remove_file(&connector
->kdev
, &connector_attrs
[i
]);
432 sysfs_remove_bin_file(&connector
->kdev
.kobj
, &edid_attr
);
433 device_unregister(&connector
->kdev
);
435 EXPORT_SYMBOL(drm_sysfs_connector_remove
);
438 * drm_sysfs_hotplug_event - generate a DRM uevent
441 * Send a uevent for the DRM device specified by @dev. Currently we only
442 * set HOTPLUG=1 in the uevent environment, but this could be expanded to
443 * deal with other types of events.
445 void drm_sysfs_hotplug_event(struct drm_device
*dev
)
447 char *event_string
= "HOTPLUG=1";
448 char *envp
[] = { event_string
, NULL
};
450 DRM_DEBUG("generating hotplug event\n");
452 kobject_uevent_env(&dev
->primary
->kdev
.kobj
, KOBJ_CHANGE
, envp
);
454 EXPORT_SYMBOL(drm_sysfs_hotplug_event
);
457 * drm_sysfs_device_add - adds a class device to sysfs for a character driver
458 * @dev: DRM device to be added
459 * @head: DRM head in question
461 * Add a DRM device to the DRM's device model class. We use @dev's PCI device
462 * as the parent for the Linux device, and make sure it has a file containing
463 * the driver we're using (for userspace compatibility).
465 int drm_sysfs_device_add(struct drm_minor
*minor
)
470 minor
->kdev
.parent
= &minor
->dev
->pdev
->dev
;
471 minor
->kdev
.class = drm_class
;
472 minor
->kdev
.release
= drm_sysfs_device_release
;
473 minor
->kdev
.devt
= minor
->device
;
474 if (minor
->type
== DRM_MINOR_CONTROL
)
475 minor_str
= "controlD%d";
476 else if (minor
->type
== DRM_MINOR_RENDER
)
477 minor_str
= "renderD%d";
479 minor_str
= "card%d";
481 dev_set_name(&minor
->kdev
, minor_str
, minor
->index
);
483 err
= device_register(&minor
->kdev
);
485 DRM_ERROR("device add failed: %d\n", err
);
491 device_unregister(&minor
->kdev
);
498 * drm_sysfs_device_remove - remove DRM device
499 * @dev: DRM device to remove
501 * This call unregisters and cleans up a class device that was created with a
502 * call to drm_sysfs_device_add()
504 void drm_sysfs_device_remove(struct drm_minor
*minor
)
506 device_unregister(&minor
->kdev
);