diff options
Diffstat (limited to 'drivers/char/drm/drm_sysfs.c')
-rw-r--r-- | drivers/char/drm/drm_sysfs.c | 146 |
1 files changed, 97 insertions, 49 deletions
diff --git a/drivers/char/drm/drm_sysfs.c b/drivers/char/drm/drm_sysfs.c index cf4349b..fa36153 100644 --- a/drivers/char/drm/drm_sysfs.c +++ b/drivers/char/drm/drm_sysfs.c @@ -19,6 +19,45 @@ #include "drm_core.h" #include "drmP.h" +#define to_drm_device(d) container_of(d, struct drm_device, dev) + +/** + * drm_sysfs_suspend - DRM class suspend hook + * @dev: Linux device to suspend + * @state: power state to enter + * + * Just figures out what the actual struct drm_device associated with + * @dev is and calls its suspend hook, if present. + */ +static int drm_sysfs_suspend(struct device *dev, pm_message_t state) +{ + struct drm_device *drm_dev = to_drm_device(dev); + + printk(KERN_ERR "%s\n", __FUNCTION__); + + if (drm_dev->driver->suspend) + return drm_dev->driver->suspend(drm_dev); + + return 0; +} + +/** + * drm_sysfs_resume - DRM class resume hook + * @dev: Linux device to resume + * + * Just figures out what the actual struct drm_device associated with + * @dev is and calls its resume hook, if present. + */ +static int drm_sysfs_resume(struct device *dev) +{ + struct drm_device *drm_dev = to_drm_device(dev); + + if (drm_dev->driver->resume) + return drm_dev->driver->resume(drm_dev); + + return 0; +} + /* Display the version of drm_core. This doesn't work right in current design */ static ssize_t version_show(struct class *dev, char *buf) { @@ -33,7 +72,7 @@ static CLASS_ATTR(version, S_IRUGO, version_show, NULL); * @owner: pointer to the module that is to "own" this struct drm_sysfs_class * @name: pointer to a string for the name of this class. * - * This is used to create a struct drm_sysfs_class pointer that can then be used + * This is used to create DRM class pointer that can then be used * in calls to drm_sysfs_device_add(). * * Note, the pointer created here is to be destroyed when finished by making a @@ -50,6 +89,9 @@ struct class *drm_sysfs_create(struct module *owner, char *name) goto err_out; } + class->suspend = drm_sysfs_suspend; + class->resume = drm_sysfs_resume; + err = class_create_file(class, &class_attr_version); if (err) goto err_out_class; @@ -63,94 +105,100 @@ err_out: } /** - * drm_sysfs_destroy - destroys a struct drm_sysfs_class structure - * @cs: pointer to the struct drm_sysfs_class that is to be destroyed + * drm_sysfs_destroy - destroys DRM class * - * Note, the pointer to be destroyed must have been created with a call to - * drm_sysfs_create(). + * Destroy the DRM device class. */ -void drm_sysfs_destroy(struct class *class) +void drm_sysfs_destroy(void) { - if ((class == NULL) || (IS_ERR(class))) + if ((drm_class == NULL) || (IS_ERR(drm_class))) return; - - class_remove_file(class, &class_attr_version); - class_destroy(class); + class_remove_file(drm_class, &class_attr_version); + class_destroy(drm_class); } -static ssize_t show_dri(struct class_device *class_device, char *buf) +static ssize_t show_dri(struct device *device, struct device_attribute *attr, + char *buf) { - struct drm_device * dev = ((struct drm_head *)class_get_devdata(class_device))->dev; + struct drm_device *dev = to_drm_device(device); if (dev->driver->dri_library_name) return dev->driver->dri_library_name(dev, buf); return snprintf(buf, PAGE_SIZE, "%s\n", dev->driver->pci_driver.name); } -static struct class_device_attribute class_device_attrs[] = { +static struct device_attribute device_attrs[] = { __ATTR(dri_library_name, S_IRUGO, show_dri, NULL), }; /** + * drm_sysfs_device_release - do nothing + * @dev: Linux device + * + * Normally, this would free the DRM device associated with @dev, along + * with cleaning up any other stuff. But we do that in the DRM core, so + * this function can just return and hope that the core does its job. + */ +static void drm_sysfs_device_release(struct device *dev) +{ + return; +} + +/** * drm_sysfs_device_add - adds a class device to sysfs for a character driver - * @cs: pointer to the struct class that this device should be registered to. - * @dev: the dev_t for the device to be added. - * @device: a pointer to a struct device that is assiociated with this class device. - * @fmt: string for the class device's name + * @dev: DRM device to be added + * @head: DRM head in question * - * A struct class_device will be created in sysfs, registered to the specified - * class. A "dev" file will be created, showing the dev_t for the device. The - * pointer to the struct class_device will be returned from the call. Any further - * sysfs files that might be required can be created using this pointer. - * Note: the struct class passed to this function must have previously been - * created with a call to drm_sysfs_create(). + * Add a DRM device to the DRM's device model class. We use @dev's PCI device + * as the parent for the Linux device, and make sure it has a file containing + * the driver we're using (for userspace compatibility). */ -struct class_device *drm_sysfs_device_add(struct class *cs, struct drm_head *head) +int drm_sysfs_device_add(struct drm_device *dev, struct drm_head *head) { - struct class_device *class_dev; - int i, j, err; - - class_dev = class_device_create(cs, NULL, - MKDEV(DRM_MAJOR, head->minor), - &(head->dev->pdev)->dev, - "card%d", head->minor); - if (IS_ERR(class_dev)) { - err = PTR_ERR(class_dev); + int err; + int i, j; + + dev->dev.parent = &dev->pdev->dev; + dev->dev.class = drm_class; + dev->dev.release = drm_sysfs_device_release; + dev->dev.devt = head->device; + snprintf(dev->dev.bus_id, BUS_ID_SIZE, "card%d", head->minor); + + err = device_register(&dev->dev); + if (err) { + DRM_ERROR("device add failed: %d\n", err); goto err_out; } - class_set_devdata(class_dev, head); - - for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) { - err = class_device_create_file(class_dev, - &class_device_attrs[i]); + for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { + err = device_create_file(&dev->dev, &device_attrs[i]); if (err) goto err_out_files; } - return class_dev; + return 0; err_out_files: if (i > 0) for (j = 0; j < i; j++) - class_device_remove_file(class_dev, - &class_device_attrs[i]); - class_device_unregister(class_dev); + device_remove_file(&dev->dev, &device_attrs[i]); + device_unregister(&dev->dev); err_out: - return ERR_PTR(err); + + return err; } /** - * drm_sysfs_device_remove - removes a class device that was created with drm_sysfs_device_add() - * @dev: the dev_t of the device that was previously registered. + * drm_sysfs_device_remove - remove DRM device + * @dev: DRM device to remove * * This call unregisters and cleans up a class device that was created with a * call to drm_sysfs_device_add() */ -void drm_sysfs_device_remove(struct class_device *class_dev) +void drm_sysfs_device_remove(struct drm_device *dev) { int i; - for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) - class_device_remove_file(class_dev, &class_device_attrs[i]); - class_device_unregister(class_dev); + for (i = 0; i < ARRAY_SIZE(device_attrs); i++) + device_remove_file(&dev->dev, &device_attrs[i]); + device_unregister(&dev->dev); } |