drm: uevent for connector status change
DRM API for generating uevent for a status changes of connector's property. This uevent will have following details related to the status change: HOTPLUG=1, CONNECTOR=<connector_id> and PROPERTY=<property_id> Pekka have completed the Weston DRM-backend review in https://gitlab.freedesktop.org/wayland/weston/merge_requests/48 and the UAPI for HDCP 2.2 looks good. The userspace is accepted in Weston. v2: Minor fixes at KDoc comments [Daniel] v3: Check the property is really attached with connector [Daniel] v4: Typos and string length suggestions are addressed [Sean] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Sean Paul <sean@poorly.run> Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/320961/?series=57232&rev=14
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@ -27,6 +27,7 @@
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#include <drm/drm_sysfs.h>
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#include <drm/drm_sysfs.h>
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#include "drm_internal.h"
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#include "drm_internal.h"
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#include "drm_crtc_internal.h"
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#define to_drm_minor(d) dev_get_drvdata(d)
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#define to_drm_minor(d) dev_get_drvdata(d)
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#define to_drm_connector(d) dev_get_drvdata(d)
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#define to_drm_connector(d) dev_get_drvdata(d)
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@ -333,6 +334,9 @@ void drm_sysfs_lease_event(struct drm_device *dev)
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* Send a uevent for the DRM device specified by @dev. Currently we only
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* Send a uevent for the DRM device specified by @dev. Currently we only
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* set HOTPLUG=1 in the uevent environment, but this could be expanded to
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* set HOTPLUG=1 in the uevent environment, but this could be expanded to
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* deal with other types of events.
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* deal with other types of events.
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*
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* Any new uapi should be using the drm_sysfs_connector_status_event()
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* for uevents on connector status change.
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*/
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*/
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void drm_sysfs_hotplug_event(struct drm_device *dev)
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void drm_sysfs_hotplug_event(struct drm_device *dev)
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{
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{
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@ -345,6 +349,37 @@ void drm_sysfs_hotplug_event(struct drm_device *dev)
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}
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}
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EXPORT_SYMBOL(drm_sysfs_hotplug_event);
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EXPORT_SYMBOL(drm_sysfs_hotplug_event);
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/**
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* drm_sysfs_connector_status_event - generate a DRM uevent for connector
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* property status change
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* @connector: connector on which property status changed
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* @property: connector property whose status changed.
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*
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* Send a uevent for the DRM device specified by @dev. Currently we
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* set HOTPLUG=1 and connector id along with the attached property id
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* related to the status change.
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*/
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void drm_sysfs_connector_status_event(struct drm_connector *connector,
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struct drm_property *property)
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{
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struct drm_device *dev = connector->dev;
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char hotplug_str[] = "HOTPLUG=1", conn_id[21], prop_id[21];
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char *envp[4] = { hotplug_str, conn_id, prop_id, NULL };
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WARN_ON(!drm_mode_obj_find_prop_id(&connector->base,
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property->base.id));
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snprintf(conn_id, ARRAY_SIZE(conn_id),
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"CONNECTOR=%u", connector->base.id);
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snprintf(prop_id, ARRAY_SIZE(prop_id),
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"PROPERTY=%u", property->base.id);
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DRM_DEBUG("generating connector status event\n");
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kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
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}
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EXPORT_SYMBOL(drm_sysfs_connector_status_event);
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static void drm_sysfs_release(struct device *dev)
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static void drm_sysfs_release(struct device *dev)
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{
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{
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kfree(dev);
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kfree(dev);
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@ -4,10 +4,13 @@
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struct drm_device;
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struct drm_device;
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struct device;
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struct device;
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struct drm_connector;
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struct drm_property;
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int drm_class_device_register(struct device *dev);
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int drm_class_device_register(struct device *dev);
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void drm_class_device_unregister(struct device *dev);
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void drm_class_device_unregister(struct device *dev);
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void drm_sysfs_hotplug_event(struct drm_device *dev);
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void drm_sysfs_hotplug_event(struct drm_device *dev);
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void drm_sysfs_connector_status_event(struct drm_connector *connector,
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struct drm_property *property);
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#endif
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#endif
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