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authorRamalingam C <ramalingam.c@intel.com>2019-08-01 13:41:16 +0200
committerRamalingam C <ramalingam.c@intel.com>2019-08-06 09:46:54 +0200
commit6fe2ce064936efe5fbf2ce62c0b9be790d75189f (patch)
treee3ee1656976a05c9bdd885e0ee9934619f98dde9 /drivers/gpu/drm/drm_sysfs.c
parentdrm/i915: Attach content type property (diff)
downloadlinux-6fe2ce064936efe5fbf2ce62c0b9be790d75189f.tar.xz
linux-6fe2ce064936efe5fbf2ce62c0b9be790d75189f.zip
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
Diffstat (limited to 'drivers/gpu/drm/drm_sysfs.c')
-rw-r--r--drivers/gpu/drm/drm_sysfs.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index e962a9d45f7e..dd2bc85f43cc 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -27,6 +27,7 @@
#include <drm/drm_sysfs.h>
#include "drm_internal.h"
+#include "drm_crtc_internal.h"
#define to_drm_minor(d) dev_get_drvdata(d)
#define to_drm_connector(d) dev_get_drvdata(d)
@@ -333,6 +334,9 @@ void drm_sysfs_lease_event(struct drm_device *dev)
* 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.
+ *
+ * Any new uapi should be using the drm_sysfs_connector_status_event()
+ * for uevents on connector status change.
*/
void drm_sysfs_hotplug_event(struct drm_device *dev)
{
@@ -345,6 +349,37 @@ void drm_sysfs_hotplug_event(struct drm_device *dev)
}
EXPORT_SYMBOL(drm_sysfs_hotplug_event);
+/**
+ * drm_sysfs_connector_status_event - generate a DRM uevent for connector
+ * property status change
+ * @connector: connector on which property status changed
+ * @property: connector property whose status changed.
+ *
+ * Send a uevent for the DRM device specified by @dev. Currently we
+ * set HOTPLUG=1 and connector id along with the attached property id
+ * related to the status change.
+ */
+void drm_sysfs_connector_status_event(struct drm_connector *connector,
+ struct drm_property *property)
+{
+ struct drm_device *dev = connector->dev;
+ char hotplug_str[] = "HOTPLUG=1", conn_id[21], prop_id[21];
+ char *envp[4] = { hotplug_str, conn_id, prop_id, NULL };
+
+ WARN_ON(!drm_mode_obj_find_prop_id(&connector->base,
+ property->base.id));
+
+ snprintf(conn_id, ARRAY_SIZE(conn_id),
+ "CONNECTOR=%u", connector->base.id);
+ snprintf(prop_id, ARRAY_SIZE(prop_id),
+ "PROPERTY=%u", property->base.id);
+
+ DRM_DEBUG("generating connector status event\n");
+
+ kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
+}
+EXPORT_SYMBOL(drm_sysfs_connector_status_event);
+
static void drm_sysfs_release(struct device *dev)
{
kfree(dev);