diff options
Diffstat (limited to 'drivers/gpu/drm/drm_sysfs.c')
| -rw-r--r-- | drivers/gpu/drm/drm_sysfs.c | 527 |
1 files changed, 453 insertions, 74 deletions
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index af211a0ef17..369b26278e7 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -14,58 +14,101 @@ #include <linux/device.h> #include <linux/kdev_t.h> +#include <linux/gfp.h> #include <linux/err.h> +#include <linux/export.h> -#include "drm_core.h" -#include "drmP.h" +#include <drm/drm_sysfs.h> +#include <drm/drm_core.h> +#include <drm/drmP.h> -#define to_drm_minor(d) container_of(d, struct drm_minor, kdev) +#define to_drm_minor(d) dev_get_drvdata(d) +#define to_drm_connector(d) dev_get_drvdata(d) + +static struct device_type drm_sysfs_device_minor = { + .name = "drm_minor" +}; /** - * drm_sysfs_suspend - DRM class suspend hook + * __drm_class_suspend - internal DRM class suspend routine * @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) +static int __drm_class_suspend(struct device *dev, pm_message_t state) { - struct drm_minor *drm_minor = to_drm_minor(dev); - struct drm_device *drm_dev = drm_minor->dev; + if (dev->type == &drm_sysfs_device_minor) { + struct drm_minor *drm_minor = to_drm_minor(dev); + struct drm_device *drm_dev = drm_minor->dev; + + if (drm_minor->type == DRM_MINOR_LEGACY && + !drm_core_check_feature(drm_dev, DRIVER_MODESET) && + drm_dev->driver->suspend) + return drm_dev->driver->suspend(drm_dev, state); + } + return 0; +} - if (drm_dev->driver->suspend) - return drm_dev->driver->suspend(drm_dev, state); +/** + * drm_class_suspend - internal DRM class suspend hook. Simply calls + * __drm_class_suspend() with the correct pm state. + * @dev: Linux device to suspend + */ +static int drm_class_suspend(struct device *dev) +{ + return __drm_class_suspend(dev, PMSG_SUSPEND); +} - return 0; +/** + * drm_class_freeze - internal DRM class freeze hook. Simply calls + * __drm_class_suspend() with the correct pm state. + * @dev: Linux device to freeze + */ +static int drm_class_freeze(struct device *dev) +{ + return __drm_class_suspend(dev, PMSG_FREEZE); } /** - * drm_sysfs_resume - DRM class resume hook + * drm_class_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) +static int drm_class_resume(struct device *dev) { - struct drm_minor *drm_minor = to_drm_minor(dev); - struct drm_device *drm_dev = drm_minor->dev; - - if (drm_dev->driver->resume) - return drm_dev->driver->resume(drm_dev); - + if (dev->type == &drm_sysfs_device_minor) { + struct drm_minor *drm_minor = to_drm_minor(dev); + struct drm_device *drm_dev = drm_minor->dev; + + if (drm_minor->type == DRM_MINOR_LEGACY && + !drm_core_check_feature(drm_dev, DRIVER_MODESET) && + 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) +static const struct dev_pm_ops drm_class_dev_pm_ops = { + .suspend = drm_class_suspend, + .resume = drm_class_resume, + .freeze = drm_class_freeze, +}; + +static char *drm_devnode(struct device *dev, umode_t *mode) { - return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, - CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); + return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); } -static CLASS_ATTR(version, S_IRUGO, version_show, NULL); +static CLASS_ATTR_STRING(version, S_IRUGO, + CORE_NAME " " + __stringify(CORE_MAJOR) "." + __stringify(CORE_MINOR) "." + __stringify(CORE_PATCHLEVEL) " " + CORE_DATE); /** * drm_sysfs_create - create a struct drm_sysfs_class structure @@ -89,13 +132,14 @@ struct class *drm_sysfs_create(struct module *owner, char *name) goto err_out; } - class->suspend = drm_sysfs_suspend; - class->resume = drm_sysfs_resume; + class->pm = &drm_class_dev_pm_ops; - err = class_create_file(class, &class_attr_version); + err = class_create_file(class, &class_attr_version.attr); if (err) goto err_out_class; + class->devnode = drm_devnode; + return class; err_out_class: @@ -113,35 +157,341 @@ void drm_sysfs_destroy(void) { if ((drm_class == NULL) || (IS_ERR(drm_class))) return; - class_remove_file(drm_class, &class_attr_version); + class_remove_file(drm_class, &class_attr_version.attr); class_destroy(drm_class); + drm_class = NULL; +} + +/* + * Connector properties + */ +static ssize_t status_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct drm_connector *connector = to_drm_connector(device); + enum drm_connector_status status; + int ret; + + ret = mutex_lock_interruptible(&connector->dev->mode_config.mutex); + if (ret) + return ret; + + status = connector->funcs->detect(connector, true); + mutex_unlock(&connector->dev->mode_config.mutex); + + return snprintf(buf, PAGE_SIZE, "%s\n", + drm_get_connector_status_name(status)); +} + +static ssize_t dpms_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct drm_connector *connector = to_drm_connector(device); + struct drm_device *dev = connector->dev; + uint64_t dpms_status; + int ret; + + ret = drm_object_property_get_value(&connector->base, + dev->mode_config.dpms_property, + &dpms_status); + if (ret) + return 0; + + return snprintf(buf, PAGE_SIZE, "%s\n", + drm_get_dpms_name((int)dpms_status)); +} + +static ssize_t enabled_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct drm_connector *connector = to_drm_connector(device); + + return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : + "disabled"); +} + +static ssize_t edid_show(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, loff_t off, + size_t count) +{ + struct device *connector_dev = container_of(kobj, struct device, kobj); + struct drm_connector *connector = to_drm_connector(connector_dev); + unsigned char *edid; + size_t size; + + if (!connector->edid_blob_ptr) + return 0; + + edid = connector->edid_blob_ptr->data; + size = connector->edid_blob_ptr->length; + if (!edid) + return 0; + + if (off >= size) + return 0; + + if (off + count > size) + count = size - off; + memcpy(buf, edid + off, count); + + return count; +} + +static ssize_t modes_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct drm_connector *connector = to_drm_connector(device); + struct drm_display_mode *mode; + int written = 0; + + list_for_each_entry(mode, &connector->modes, head) { + written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", + mode->name); + } + + return written; +} + +static ssize_t subconnector_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct drm_connector *connector = to_drm_connector(device); + struct drm_device *dev = connector->dev; + struct drm_property *prop = NULL; + uint64_t subconnector; + int is_tv = 0; + int ret; + + switch (connector->connector_type) { + case DRM_MODE_CONNECTOR_DVII: + prop = dev->mode_config.dvi_i_subconnector_property; + break; + case DRM_MODE_CONNECTOR_Composite: + case DRM_MODE_CONNECTOR_SVIDEO: + case DRM_MODE_CONNECTOR_Component: + case DRM_MODE_CONNECTOR_TV: + prop = dev->mode_config.tv_subconnector_property; + is_tv = 1; + break; + default: + DRM_ERROR("Wrong connector type for this property\n"); + return 0; + } + + if (!prop) { + DRM_ERROR("Unable to find subconnector property\n"); + return 0; + } + + ret = drm_object_property_get_value(&connector->base, prop, &subconnector); + if (ret) + return 0; + + return snprintf(buf, PAGE_SIZE, "%s", is_tv ? + drm_get_tv_subconnector_name((int)subconnector) : + drm_get_dvi_i_subconnector_name((int)subconnector)); } -static ssize_t show_dri(struct device *device, struct device_attribute *attr, - char *buf) +static ssize_t select_subconnector_show(struct device *device, + struct device_attribute *attr, + char *buf) { - struct drm_minor *drm_minor = to_drm_minor(device); - struct drm_device *drm_dev = drm_minor->dev; - if (drm_dev->driver->dri_library_name) - return drm_dev->driver->dri_library_name(drm_dev, buf); - return snprintf(buf, PAGE_SIZE, "%s\n", drm_dev->driver->pci_driver.name); + struct drm_connector *connector = to_drm_connector(device); + struct drm_device *dev = connector->dev; + struct drm_property *prop = NULL; + uint64_t subconnector; + int is_tv = 0; + int ret; + + switch (connector->connector_type) { + case DRM_MODE_CONNECTOR_DVII: + prop = dev->mode_config.dvi_i_select_subconnector_property; + break; + case DRM_MODE_CONNECTOR_Composite: + case DRM_MODE_CONNECTOR_SVIDEO: + case DRM_MODE_CONNECTOR_Component: + case DRM_MODE_CONNECTOR_TV: + prop = dev->mode_config.tv_select_subconnector_property; + is_tv = 1; + break; + default: + DRM_ERROR("Wrong connector type for this property\n"); + return 0; + } + + if (!prop) { + DRM_ERROR("Unable to find select subconnector property\n"); + return 0; + } + + ret = drm_object_property_get_value(&connector->base, prop, &subconnector); + if (ret) + return 0; + + return snprintf(buf, PAGE_SIZE, "%s", is_tv ? + drm_get_tv_select_name((int)subconnector) : + drm_get_dvi_i_select_name((int)subconnector)); } -static struct device_attribute device_attrs[] = { - __ATTR(dri_library_name, S_IRUGO, show_dri, NULL), +static struct device_attribute connector_attrs[] = { + __ATTR_RO(status), + __ATTR_RO(enabled), + __ATTR_RO(dpms), + __ATTR_RO(modes), +}; + +/* These attributes are for both DVI-I connectors and all types of tv-out. */ +static struct device_attribute connector_attrs_opt1[] = { + __ATTR_RO(subconnector), + __ATTR_RO(select_subconnector), }; +static struct bin_attribute edid_attr = { + .attr.name = "edid", + .attr.mode = 0444, + .size = 0, + .read = edid_show, +}; + +/** + * drm_sysfs_connector_add - add a connector to sysfs + * @connector: connector to add + * + * Create a connector device in sysfs, along with its associated connector + * properties (so far, connection status, dpms, mode list & edid) and + * generate a hotplug event so userspace knows there's a new connector + * available. + */ +int drm_sysfs_connector_add(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + int attr_cnt = 0; + int opt_cnt = 0; + int i; + int ret; + + if (connector->kdev) + return 0; + + connector->kdev = device_create(drm_class, dev->primary->kdev, + 0, connector, "card%d-%s", + dev->primary->index, connector->name); + DRM_DEBUG("adding \"%s\" to sysfs\n", + connector->name); + + if (IS_ERR(connector->kdev)) { + DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev)); + ret = PTR_ERR(connector->kdev); + goto out; + } + + /* Standard attributes */ + + for (attr_cnt = 0; attr_cnt < ARRAY_SIZE(connector_attrs); attr_cnt++) { + ret = device_create_file(connector->kdev, &connector_attrs[attr_cnt]); + if (ret) + goto err_out_files; + } + + /* Optional attributes */ + /* + * In the long run it maybe a good idea to make one set of + * optionals per connector type. + */ + switch (connector->connector_type) { + case DRM_MODE_CONNECTOR_DVII: + case DRM_MODE_CONNECTOR_Composite: + case DRM_MODE_CONNECTOR_SVIDEO: + case DRM_MODE_CONNECTOR_Component: + case DRM_MODE_CONNECTOR_TV: + for (opt_cnt = 0; opt_cnt < ARRAY_SIZE(connector_attrs_opt1); opt_cnt++) { + ret = device_create_file(connector->kdev, &connector_attrs_opt1[opt_cnt]); + if (ret) + goto err_out_files; + } + break; + default: + break; + } + + ret = sysfs_create_bin_file(&connector->kdev->kobj, &edid_attr); + if (ret) + goto err_out_files; + + /* Let userspace know we have a new connector */ + drm_sysfs_hotplug_event(dev); + + return 0; + +err_out_files: + for (i = 0; i < opt_cnt; i++) + device_remove_file(connector->kdev, &connector_attrs_opt1[i]); + for (i = 0; i < attr_cnt; i++) + device_remove_file(connector->kdev, &connector_attrs[i]); + device_unregister(connector->kdev); + +out: + return ret; +} +EXPORT_SYMBOL(drm_sysfs_connector_add); + /** - * drm_sysfs_device_release - do nothing - * @dev: Linux device + * drm_sysfs_connector_remove - remove an connector device from sysfs + * @connector: connector to remove + * + * Remove @connector and its associated attributes from sysfs. Note that + * the device model core will take care of sending the "remove" uevent + * at this time, so we don't need to do it. * - * 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. + * Note: + * This routine should only be called if the connector was previously + * successfully registered. If @connector hasn't been registered yet, + * you'll likely see a panic somewhere deep in sysfs code when called. */ -static void drm_sysfs_device_release(struct device *dev) +void drm_sysfs_connector_remove(struct drm_connector *connector) { - return; + int i; + + if (!connector->kdev) + return; + DRM_DEBUG("removing \"%s\" from sysfs\n", + connector->name); + + for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) + device_remove_file(connector->kdev, &connector_attrs[i]); + sysfs_remove_bin_file(&connector->kdev->kobj, &edid_attr); + device_unregister(connector->kdev); + connector->kdev = NULL; +} +EXPORT_SYMBOL(drm_sysfs_connector_remove); + +/** + * drm_sysfs_hotplug_event - generate a DRM uevent + * @dev: DRM device + * + * Send a uevent for the DRM device specified by @dev. Currently we only + * set HOTPLUG=1 in the uevent environment, but this could be expanded to + * deal with other types of events. + */ +void drm_sysfs_hotplug_event(struct drm_device *dev) +{ + char *event_string = "HOTPLUG=1"; + char *envp[] = { event_string, NULL }; + + DRM_DEBUG("generating hotplug event\n"); + + kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp); +} +EXPORT_SYMBOL(drm_sysfs_hotplug_event); + +static void drm_sysfs_release(struct device *dev) +{ + kfree(dev); } /** @@ -155,40 +505,44 @@ static void drm_sysfs_device_release(struct device *dev) */ int drm_sysfs_device_add(struct drm_minor *minor) { - int err; - int i, j; char *minor_str; + int r; + + if (minor->type == DRM_MINOR_CONTROL) + minor_str = "controlD%d"; + else if (minor->type == DRM_MINOR_RENDER) + minor_str = "renderD%d"; + else + minor_str = "card%d"; + + minor->kdev = kzalloc(sizeof(*minor->kdev), GFP_KERNEL); + if (!minor->kdev) { + r = -ENOMEM; + goto error; + } - minor->kdev.parent = &minor->dev->pdev->dev; - minor->kdev.class = drm_class; - minor->kdev.release = drm_sysfs_device_release; - minor->kdev.devt = minor->device; - minor_str = "card%d"; - - snprintf(minor->kdev.bus_id, BUS_ID_SIZE, minor_str, minor->index); + device_initialize(minor->kdev); + minor->kdev->devt = MKDEV(DRM_MAJOR, minor->index); + minor->kdev->class = drm_class; + minor->kdev->type = &drm_sysfs_device_minor; + minor->kdev->parent = minor->dev->dev; + minor->kdev->release = drm_sysfs_release; + dev_set_drvdata(minor->kdev, minor); - err = device_register(&minor->kdev); - if (err) { - DRM_ERROR("device add failed: %d\n", err); - goto err_out; - } + r = dev_set_name(minor->kdev, minor_str, minor->index); + if (r < 0) + goto error; - for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { - err = device_create_file(&minor->kdev, &device_attrs[i]); - if (err) - goto err_out_files; - } + r = device_add(minor->kdev); + if (r < 0) + goto error; return 0; -err_out_files: - if (i > 0) - for (j = 0; j < i; j++) - device_remove_file(&minor->kdev, &device_attrs[i]); - device_unregister(&minor->kdev); -err_out: - - return err; +error: + DRM_ERROR("device create failed %d\n", r); + put_device(minor->kdev); + return r; } /** @@ -200,9 +554,34 @@ err_out: */ void drm_sysfs_device_remove(struct drm_minor *minor) { - int i; + if (minor->kdev) + device_unregister(minor->kdev); + minor->kdev = NULL; +} - for (i = 0; i < ARRAY_SIZE(device_attrs); i++) - device_remove_file(&minor->kdev, &device_attrs[i]); - device_unregister(&minor->kdev); + +/** + * drm_class_device_register - Register a struct device in the drm class. + * + * @dev: pointer to struct device to register. + * + * @dev should have all relevant members pre-filled with the exception + * of the class member. In particular, the device_type member must + * be set. + */ + +int drm_class_device_register(struct device *dev) +{ + if (!drm_class || IS_ERR(drm_class)) + return -ENOENT; + + dev->class = drm_class; + return device_register(dev); +} +EXPORT_SYMBOL_GPL(drm_class_device_register); + +void drm_class_device_unregister(struct device *dev) +{ + return device_unregister(dev); } +EXPORT_SYMBOL_GPL(drm_class_device_unregister); |