Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 1 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 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. |
| 6 | * |
| 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. |
| 10 | * |
| 11 | * This file is released under the GPLv2 |
| 12 | * |
| 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/device.h> |
| 16 | #include <linux/kdev_t.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/err.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 19 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 21 | #include <drm/drm_sysfs.h> |
| 22 | #include <drm/drm_core.h> |
| 23 | #include <drm/drmP.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 25 | #define to_drm_minor(d) container_of(d, struct drm_minor, kdev) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 26 | #define to_drm_connector(d) container_of(d, struct drm_connector, kdev) |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 27 | |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 28 | static struct device_type drm_sysfs_device_minor = { |
| 29 | .name = "drm_minor" |
| 30 | }; |
| 31 | |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 32 | /** |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 33 | * drm_class_suspend - DRM class suspend hook |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 34 | * @dev: Linux device to suspend |
| 35 | * @state: power state to enter |
| 36 | * |
| 37 | * Just figures out what the actual struct drm_device associated with |
| 38 | * @dev is and calls its suspend hook, if present. |
| 39 | */ |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 40 | static int drm_class_suspend(struct device *dev, pm_message_t state) |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 41 | { |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 42 | if (dev->type == &drm_sysfs_device_minor) { |
| 43 | struct drm_minor *drm_minor = to_drm_minor(dev); |
| 44 | struct drm_device *drm_dev = drm_minor->dev; |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 45 | |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 46 | if (drm_minor->type == DRM_MINOR_LEGACY && |
| 47 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && |
| 48 | drm_dev->driver->suspend) |
| 49 | return drm_dev->driver->suspend(drm_dev, state); |
| 50 | } |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | /** |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 55 | * drm_class_resume - DRM class resume hook |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 56 | * @dev: Linux device to resume |
| 57 | * |
| 58 | * Just figures out what the actual struct drm_device associated with |
| 59 | * @dev is and calls its resume hook, if present. |
| 60 | */ |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 61 | static int drm_class_resume(struct device *dev) |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 62 | { |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 63 | if (dev->type == &drm_sysfs_device_minor) { |
| 64 | struct drm_minor *drm_minor = to_drm_minor(dev); |
| 65 | struct drm_device *drm_dev = drm_minor->dev; |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 66 | |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 67 | if (drm_minor->type == DRM_MINOR_LEGACY && |
| 68 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && |
| 69 | drm_dev->driver->resume) |
| 70 | return drm_dev->driver->resume(drm_dev); |
| 71 | } |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 72 | return 0; |
| 73 | } |
| 74 | |
Al Viro | 2c9ede5 | 2011-07-23 20:24:48 -0400 | [diff] [blame] | 75 | static char *drm_devnode(struct device *dev, umode_t *mode) |
Kay Sievers | 02200d0 | 2009-04-30 15:23:42 +0200 | [diff] [blame] | 76 | { |
| 77 | return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); |
| 78 | } |
| 79 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 80 | static CLASS_ATTR_STRING(version, S_IRUGO, |
| 81 | CORE_NAME " " |
| 82 | __stringify(CORE_MAJOR) "." |
| 83 | __stringify(CORE_MINOR) "." |
| 84 | __stringify(CORE_PATCHLEVEL) " " |
| 85 | CORE_DATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | /** |
| 88 | * drm_sysfs_create - create a struct drm_sysfs_class structure |
| 89 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class |
| 90 | * @name: pointer to a string for the name of this class. |
| 91 | * |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 92 | * This is used to create DRM class pointer that can then be used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | * in calls to drm_sysfs_device_add(). |
| 94 | * |
| 95 | * Note, the pointer created here is to be destroyed when finished by making a |
| 96 | * call to drm_sysfs_destroy(). |
| 97 | */ |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 98 | struct class *drm_sysfs_create(struct module *owner, char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 100 | struct class *class; |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 101 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 103 | class = class_create(owner, name); |
Akinobu Mita | 94f060b | 2006-12-09 10:49:47 +1100 | [diff] [blame] | 104 | if (IS_ERR(class)) { |
| 105 | err = PTR_ERR(class); |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 106 | goto err_out; |
| 107 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 109 | class->suspend = drm_class_suspend; |
| 110 | class->resume = drm_class_resume; |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 111 | |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 112 | err = class_create_file(class, &class_attr_version.attr); |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 113 | if (err) |
| 114 | goto err_out_class; |
| 115 | |
Kay Sievers | e454cea | 2009-09-18 23:01:12 +0200 | [diff] [blame] | 116 | class->devnode = drm_devnode; |
Kay Sievers | 02200d0 | 2009-04-30 15:23:42 +0200 | [diff] [blame] | 117 | |
Greg Kroah-Hartman | 0650fd5 | 2006-01-20 14:08:59 -0800 | [diff] [blame] | 118 | return class; |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 119 | |
| 120 | err_out_class: |
| 121 | class_destroy(class); |
| 122 | err_out: |
| 123 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /** |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 127 | * drm_sysfs_destroy - destroys DRM class |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | * |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 129 | * Destroy the DRM device class. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | */ |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 131 | void drm_sysfs_destroy(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 133 | if ((drm_class == NULL) || (IS_ERR(drm_class))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | return; |
Andi Kleen | 0933e2d | 2010-01-05 12:48:09 +0100 | [diff] [blame] | 135 | class_remove_file(drm_class, &class_attr_version.attr); |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 136 | class_destroy(drm_class); |
Dave Airlie | 49099c4 | 2012-07-06 18:06:42 +0100 | [diff] [blame] | 137 | drm_class = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | /** |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 141 | * drm_sysfs_device_release - do nothing |
| 142 | * @dev: Linux device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | * |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 144 | * Normally, this would free the DRM device associated with @dev, along |
| 145 | * with cleaning up any other stuff. But we do that in the DRM core, so |
| 146 | * this function can just return and hope that the core does its job. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | */ |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 148 | static void drm_sysfs_device_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
Ma Ling | 77d26dc | 2009-04-16 17:51:25 +0800 | [diff] [blame] | 150 | memset(dev, 0, sizeof(struct device)); |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 151 | return; |
| 152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 154 | /* |
| 155 | * Connector properties |
| 156 | */ |
| 157 | static ssize_t status_show(struct device *device, |
| 158 | struct device_attribute *attr, |
| 159 | char *buf) |
| 160 | { |
| 161 | struct drm_connector *connector = to_drm_connector(device); |
| 162 | enum drm_connector_status status; |
Chris Wilson | 007c80a | 2011-03-15 11:40:00 +0000 | [diff] [blame] | 163 | int ret; |
| 164 | |
| 165 | ret = mutex_lock_interruptible(&connector->dev->mode_config.mutex); |
| 166 | if (ret) |
| 167 | return ret; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 168 | |
Chris Wilson | 7b334fc | 2010-09-09 23:51:02 +0100 | [diff] [blame] | 169 | status = connector->funcs->detect(connector, true); |
Chris Wilson | 007c80a | 2011-03-15 11:40:00 +0000 | [diff] [blame] | 170 | mutex_unlock(&connector->dev->mode_config.mutex); |
| 171 | |
Keith Packard | 75185c9 | 2009-05-30 20:42:25 -0700 | [diff] [blame] | 172 | return snprintf(buf, PAGE_SIZE, "%s\n", |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 173 | drm_get_connector_status_name(status)); |
| 174 | } |
| 175 | |
| 176 | static ssize_t dpms_show(struct device *device, |
| 177 | struct device_attribute *attr, |
| 178 | char *buf) |
| 179 | { |
| 180 | struct drm_connector *connector = to_drm_connector(device); |
| 181 | struct drm_device *dev = connector->dev; |
| 182 | uint64_t dpms_status; |
| 183 | int ret; |
| 184 | |
| 185 | ret = drm_connector_property_get_value(connector, |
| 186 | dev->mode_config.dpms_property, |
| 187 | &dpms_status); |
| 188 | if (ret) |
| 189 | return 0; |
| 190 | |
Keith Packard | 75185c9 | 2009-05-30 20:42:25 -0700 | [diff] [blame] | 191 | return snprintf(buf, PAGE_SIZE, "%s\n", |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 192 | drm_get_dpms_name((int)dpms_status)); |
| 193 | } |
| 194 | |
| 195 | static ssize_t enabled_show(struct device *device, |
| 196 | struct device_attribute *attr, |
| 197 | char *buf) |
| 198 | { |
| 199 | struct drm_connector *connector = to_drm_connector(device); |
| 200 | |
Keith Packard | 75185c9 | 2009-05-30 20:42:25 -0700 | [diff] [blame] | 201 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 202 | "disabled"); |
| 203 | } |
| 204 | |
Chris Wright | 2c3c8be | 2010-05-12 18:28:57 -0700 | [diff] [blame] | 205 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
| 206 | struct bin_attribute *attr, char *buf, loff_t off, |
| 207 | size_t count) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 208 | { |
| 209 | struct device *connector_dev = container_of(kobj, struct device, kobj); |
| 210 | struct drm_connector *connector = to_drm_connector(connector_dev); |
| 211 | unsigned char *edid; |
| 212 | size_t size; |
| 213 | |
| 214 | if (!connector->edid_blob_ptr) |
| 215 | return 0; |
| 216 | |
| 217 | edid = connector->edid_blob_ptr->data; |
| 218 | size = connector->edid_blob_ptr->length; |
| 219 | if (!edid) |
| 220 | return 0; |
| 221 | |
| 222 | if (off >= size) |
| 223 | return 0; |
| 224 | |
| 225 | if (off + count > size) |
| 226 | count = size - off; |
| 227 | memcpy(buf, edid + off, count); |
| 228 | |
| 229 | return count; |
| 230 | } |
| 231 | |
| 232 | static ssize_t modes_show(struct device *device, |
| 233 | struct device_attribute *attr, |
| 234 | char *buf) |
| 235 | { |
| 236 | struct drm_connector *connector = to_drm_connector(device); |
| 237 | struct drm_display_mode *mode; |
| 238 | int written = 0; |
| 239 | |
| 240 | list_for_each_entry(mode, &connector->modes, head) { |
| 241 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", |
| 242 | mode->name); |
| 243 | } |
| 244 | |
| 245 | return written; |
| 246 | } |
| 247 | |
| 248 | static ssize_t subconnector_show(struct device *device, |
| 249 | struct device_attribute *attr, |
| 250 | char *buf) |
| 251 | { |
| 252 | struct drm_connector *connector = to_drm_connector(device); |
| 253 | struct drm_device *dev = connector->dev; |
| 254 | struct drm_property *prop = NULL; |
| 255 | uint64_t subconnector; |
| 256 | int is_tv = 0; |
| 257 | int ret; |
| 258 | |
| 259 | switch (connector->connector_type) { |
| 260 | case DRM_MODE_CONNECTOR_DVII: |
| 261 | prop = dev->mode_config.dvi_i_subconnector_property; |
| 262 | break; |
| 263 | case DRM_MODE_CONNECTOR_Composite: |
| 264 | case DRM_MODE_CONNECTOR_SVIDEO: |
| 265 | case DRM_MODE_CONNECTOR_Component: |
Francisco Jerez | 74bd3c2 | 2009-08-02 04:19:18 +0200 | [diff] [blame] | 266 | case DRM_MODE_CONNECTOR_TV: |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 267 | prop = dev->mode_config.tv_subconnector_property; |
| 268 | is_tv = 1; |
| 269 | break; |
| 270 | default: |
| 271 | DRM_ERROR("Wrong connector type for this property\n"); |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | if (!prop) { |
| 276 | DRM_ERROR("Unable to find subconnector property\n"); |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | ret = drm_connector_property_get_value(connector, prop, &subconnector); |
| 281 | if (ret) |
| 282 | return 0; |
| 283 | |
| 284 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? |
| 285 | drm_get_tv_subconnector_name((int)subconnector) : |
| 286 | drm_get_dvi_i_subconnector_name((int)subconnector)); |
| 287 | } |
| 288 | |
| 289 | static ssize_t select_subconnector_show(struct device *device, |
| 290 | struct device_attribute *attr, |
| 291 | char *buf) |
| 292 | { |
| 293 | struct drm_connector *connector = to_drm_connector(device); |
| 294 | struct drm_device *dev = connector->dev; |
| 295 | struct drm_property *prop = NULL; |
| 296 | uint64_t subconnector; |
| 297 | int is_tv = 0; |
| 298 | int ret; |
| 299 | |
| 300 | switch (connector->connector_type) { |
| 301 | case DRM_MODE_CONNECTOR_DVII: |
| 302 | prop = dev->mode_config.dvi_i_select_subconnector_property; |
| 303 | break; |
| 304 | case DRM_MODE_CONNECTOR_Composite: |
| 305 | case DRM_MODE_CONNECTOR_SVIDEO: |
| 306 | case DRM_MODE_CONNECTOR_Component: |
Francisco Jerez | 74bd3c2 | 2009-08-02 04:19:18 +0200 | [diff] [blame] | 307 | case DRM_MODE_CONNECTOR_TV: |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 308 | prop = dev->mode_config.tv_select_subconnector_property; |
| 309 | is_tv = 1; |
| 310 | break; |
| 311 | default: |
| 312 | DRM_ERROR("Wrong connector type for this property\n"); |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | if (!prop) { |
| 317 | DRM_ERROR("Unable to find select subconnector property\n"); |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | ret = drm_connector_property_get_value(connector, prop, &subconnector); |
| 322 | if (ret) |
| 323 | return 0; |
| 324 | |
| 325 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? |
| 326 | drm_get_tv_select_name((int)subconnector) : |
| 327 | drm_get_dvi_i_select_name((int)subconnector)); |
| 328 | } |
| 329 | |
| 330 | static struct device_attribute connector_attrs[] = { |
| 331 | __ATTR_RO(status), |
| 332 | __ATTR_RO(enabled), |
| 333 | __ATTR_RO(dpms), |
| 334 | __ATTR_RO(modes), |
| 335 | }; |
| 336 | |
| 337 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ |
| 338 | static struct device_attribute connector_attrs_opt1[] = { |
| 339 | __ATTR_RO(subconnector), |
| 340 | __ATTR_RO(select_subconnector), |
| 341 | }; |
| 342 | |
| 343 | static struct bin_attribute edid_attr = { |
| 344 | .attr.name = "edid", |
Keith Packard | e36ebaf | 2009-05-30 20:42:26 -0700 | [diff] [blame] | 345 | .attr.mode = 0444, |
Adam Jackson | 7466f4c | 2010-03-29 21:43:23 +0000 | [diff] [blame] | 346 | .size = 0, |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 347 | .read = edid_show, |
| 348 | }; |
| 349 | |
| 350 | /** |
Laurent Pinchart | 3b02ab8 | 2012-05-17 13:27:20 +0200 | [diff] [blame] | 351 | * drm_sysfs_connector_add - add a connector to sysfs |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 352 | * @connector: connector to add |
| 353 | * |
Laurent Pinchart | 3b02ab8 | 2012-05-17 13:27:20 +0200 | [diff] [blame] | 354 | * Create a connector device in sysfs, along with its associated connector |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 355 | * properties (so far, connection status, dpms, mode list & edid) and |
| 356 | * generate a hotplug event so userspace knows there's a new connector |
| 357 | * available. |
| 358 | * |
| 359 | * Note: |
Laurent Pinchart | 3b02ab8 | 2012-05-17 13:27:20 +0200 | [diff] [blame] | 360 | * This routine should only be called *once* for each registered connector. |
| 361 | * A second call for an already registered connector will trigger the BUG_ON |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 362 | * below. |
| 363 | */ |
| 364 | int drm_sysfs_connector_add(struct drm_connector *connector) |
| 365 | { |
| 366 | struct drm_device *dev = connector->dev; |
Dan Carpenter | a1c4560 | 2010-04-27 14:11:05 -0700 | [diff] [blame] | 367 | int attr_cnt = 0; |
| 368 | int opt_cnt = 0; |
| 369 | int i; |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 370 | int ret; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 371 | |
| 372 | /* We shouldn't get called more than once for the same connector */ |
| 373 | BUG_ON(device_is_registered(&connector->kdev)); |
| 374 | |
| 375 | connector->kdev.parent = &dev->primary->kdev; |
| 376 | connector->kdev.class = drm_class; |
| 377 | connector->kdev.release = drm_sysfs_device_release; |
| 378 | |
| 379 | DRM_DEBUG("adding \"%s\" to sysfs\n", |
| 380 | drm_get_connector_name(connector)); |
| 381 | |
Kay Sievers | 2ead054 | 2009-03-24 16:38:22 -0700 | [diff] [blame] | 382 | dev_set_name(&connector->kdev, "card%d-%s", |
| 383 | dev->primary->index, drm_get_connector_name(connector)); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 384 | ret = device_register(&connector->kdev); |
| 385 | |
| 386 | if (ret) { |
| 387 | DRM_ERROR("failed to register connector device: %d\n", ret); |
| 388 | goto out; |
| 389 | } |
| 390 | |
| 391 | /* Standard attributes */ |
| 392 | |
Dan Carpenter | a1c4560 | 2010-04-27 14:11:05 -0700 | [diff] [blame] | 393 | for (attr_cnt = 0; attr_cnt < ARRAY_SIZE(connector_attrs); attr_cnt++) { |
| 394 | ret = device_create_file(&connector->kdev, &connector_attrs[attr_cnt]); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 395 | if (ret) |
| 396 | goto err_out_files; |
| 397 | } |
| 398 | |
| 399 | /* Optional attributes */ |
| 400 | /* |
| 401 | * In the long run it maybe a good idea to make one set of |
| 402 | * optionals per connector type. |
| 403 | */ |
| 404 | switch (connector->connector_type) { |
| 405 | case DRM_MODE_CONNECTOR_DVII: |
| 406 | case DRM_MODE_CONNECTOR_Composite: |
| 407 | case DRM_MODE_CONNECTOR_SVIDEO: |
| 408 | case DRM_MODE_CONNECTOR_Component: |
Francisco Jerez | 74bd3c2 | 2009-08-02 04:19:18 +0200 | [diff] [blame] | 409 | case DRM_MODE_CONNECTOR_TV: |
Dan Carpenter | a1c4560 | 2010-04-27 14:11:05 -0700 | [diff] [blame] | 410 | for (opt_cnt = 0; opt_cnt < ARRAY_SIZE(connector_attrs_opt1); opt_cnt++) { |
| 411 | ret = device_create_file(&connector->kdev, &connector_attrs_opt1[opt_cnt]); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 412 | if (ret) |
| 413 | goto err_out_files; |
| 414 | } |
| 415 | break; |
| 416 | default: |
| 417 | break; |
| 418 | } |
| 419 | |
| 420 | ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr); |
| 421 | if (ret) |
| 422 | goto err_out_files; |
| 423 | |
| 424 | /* Let userspace know we have a new connector */ |
| 425 | drm_sysfs_hotplug_event(dev); |
| 426 | |
| 427 | return 0; |
| 428 | |
| 429 | err_out_files: |
Dan Carpenter | a1c4560 | 2010-04-27 14:11:05 -0700 | [diff] [blame] | 430 | for (i = 0; i < opt_cnt; i++) |
| 431 | device_remove_file(&connector->kdev, &connector_attrs_opt1[i]); |
| 432 | for (i = 0; i < attr_cnt; i++) |
| 433 | device_remove_file(&connector->kdev, &connector_attrs[i]); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 434 | device_unregister(&connector->kdev); |
| 435 | |
| 436 | out: |
| 437 | return ret; |
| 438 | } |
| 439 | EXPORT_SYMBOL(drm_sysfs_connector_add); |
| 440 | |
| 441 | /** |
| 442 | * drm_sysfs_connector_remove - remove an connector device from sysfs |
| 443 | * @connector: connector to remove |
| 444 | * |
| 445 | * Remove @connector and its associated attributes from sysfs. Note that |
| 446 | * the device model core will take care of sending the "remove" uevent |
| 447 | * at this time, so we don't need to do it. |
| 448 | * |
| 449 | * Note: |
| 450 | * This routine should only be called if the connector was previously |
| 451 | * successfully registered. If @connector hasn't been registered yet, |
| 452 | * you'll likely see a panic somewhere deep in sysfs code when called. |
| 453 | */ |
| 454 | void drm_sysfs_connector_remove(struct drm_connector *connector) |
| 455 | { |
| 456 | int i; |
| 457 | |
Dave Airlie | 1828fe6 | 2012-02-20 14:15:02 +0000 | [diff] [blame] | 458 | if (!connector->kdev.parent) |
| 459 | return; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 460 | DRM_DEBUG("removing \"%s\" from sysfs\n", |
| 461 | drm_get_connector_name(connector)); |
| 462 | |
| 463 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) |
| 464 | device_remove_file(&connector->kdev, &connector_attrs[i]); |
| 465 | sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr); |
| 466 | device_unregister(&connector->kdev); |
Dave Airlie | 1828fe6 | 2012-02-20 14:15:02 +0000 | [diff] [blame] | 467 | connector->kdev.parent = NULL; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 468 | } |
| 469 | EXPORT_SYMBOL(drm_sysfs_connector_remove); |
| 470 | |
| 471 | /** |
| 472 | * drm_sysfs_hotplug_event - generate a DRM uevent |
| 473 | * @dev: DRM device |
| 474 | * |
| 475 | * Send a uevent for the DRM device specified by @dev. Currently we only |
| 476 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to |
| 477 | * deal with other types of events. |
| 478 | */ |
| 479 | void drm_sysfs_hotplug_event(struct drm_device *dev) |
| 480 | { |
| 481 | char *event_string = "HOTPLUG=1"; |
| 482 | char *envp[] = { event_string, NULL }; |
| 483 | |
| 484 | DRM_DEBUG("generating hotplug event\n"); |
| 485 | |
| 486 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp); |
| 487 | } |
Jesse Barnes | 5ca5828 | 2009-03-31 14:11:15 -0700 | [diff] [blame] | 488 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 489 | |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 490 | /** |
| 491 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver |
| 492 | * @dev: DRM device to be added |
| 493 | * @head: DRM head in question |
| 494 | * |
| 495 | * Add a DRM device to the DRM's device model class. We use @dev's PCI device |
| 496 | * as the parent for the Linux device, and make sure it has a file containing |
| 497 | * the driver we're using (for userspace compatibility). |
| 498 | */ |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 499 | int drm_sysfs_device_add(struct drm_minor *minor) |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 500 | { |
| 501 | int err; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 502 | char *minor_str; |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 503 | |
Jordan Crouse | dcdb167 | 2010-05-27 13:40:25 -0600 | [diff] [blame] | 504 | minor->kdev.parent = minor->dev->dev; |
| 505 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 506 | minor->kdev.class = drm_class; |
| 507 | minor->kdev.release = drm_sysfs_device_release; |
| 508 | minor->kdev.devt = minor->device; |
Thomas Hellstrom | 08e4d53 | 2009-08-20 19:02:31 +1000 | [diff] [blame] | 509 | minor->kdev.type = &drm_sysfs_device_minor; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 510 | if (minor->type == DRM_MINOR_CONTROL) |
| 511 | minor_str = "controlD%d"; |
| 512 | else if (minor->type == DRM_MINOR_RENDER) |
| 513 | minor_str = "renderD%d"; |
| 514 | else |
| 515 | minor_str = "card%d"; |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 516 | |
Kay Sievers | 8f4bbd9 | 2009-01-06 10:44:41 -0800 | [diff] [blame] | 517 | dev_set_name(&minor->kdev, minor_str, minor->index); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 518 | |
| 519 | err = device_register(&minor->kdev); |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 520 | if (err) { |
| 521 | DRM_ERROR("device add failed: %d\n", err); |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 522 | goto err_out; |
| 523 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 525 | return 0; |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 526 | |
Jeff Garzik | 24f73c9 | 2006-10-10 14:23:37 -0700 | [diff] [blame] | 527 | err_out: |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 528 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | /** |
Jesse Barnes | e8b962b | 2007-11-22 14:02:38 +1000 | [diff] [blame] | 532 | * drm_sysfs_device_remove - remove DRM device |
| 533 | * @dev: DRM device to remove |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | * |
| 535 | * This call unregisters and cleans up a class device that was created with a |
| 536 | * call to drm_sysfs_device_add() |
| 537 | */ |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 538 | void drm_sysfs_device_remove(struct drm_minor *minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | { |
Dave Airlie | 1828fe6 | 2012-02-20 14:15:02 +0000 | [diff] [blame] | 540 | if (minor->kdev.parent) |
| 541 | device_unregister(&minor->kdev); |
| 542 | minor->kdev.parent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
Thomas Hellstrom | 327c225 | 2009-08-17 16:28:37 +0200 | [diff] [blame] | 544 | |
| 545 | |
| 546 | /** |
| 547 | * drm_class_device_register - Register a struct device in the drm class. |
| 548 | * |
| 549 | * @dev: pointer to struct device to register. |
| 550 | * |
| 551 | * @dev should have all relevant members pre-filled with the exception |
| 552 | * of the class member. In particular, the device_type member must |
| 553 | * be set. |
| 554 | */ |
| 555 | |
| 556 | int drm_class_device_register(struct device *dev) |
| 557 | { |
Dave Airlie | 49099c4 | 2012-07-06 18:06:42 +0100 | [diff] [blame] | 558 | if (!drm_class || IS_ERR(drm_class)) |
| 559 | return -ENOENT; |
| 560 | |
Thomas Hellstrom | 327c225 | 2009-08-17 16:28:37 +0200 | [diff] [blame] | 561 | dev->class = drm_class; |
| 562 | return device_register(dev); |
| 563 | } |
| 564 | EXPORT_SYMBOL_GPL(drm_class_device_register); |
| 565 | |
| 566 | void drm_class_device_unregister(struct device *dev) |
| 567 | { |
| 568 | return device_unregister(dev); |
| 569 | } |
| 570 | EXPORT_SYMBOL_GPL(drm_class_device_unregister); |