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author | Hans de Goede <hdegoede@redhat.com> | 2021-10-05 22:23:16 +0200 |
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committer | Hans de Goede <hdegoede@redhat.com> | 2021-10-14 13:12:25 +0200 |
commit | 8a12b170558aabb31cc98fda0da6a56b518cadaa (patch) | |
tree | 09f3df415d74132ec03a82e4b15c1e3962697553 /include/drm/drm_privacy_screen_driver.h | |
parent | befe5404a00b3b1547c944738df4a9229909bdc9 (diff) | |
download | linux-8a12b170558aabb31cc98fda0da6a56b518cadaa.tar.bz2 |
drm/privacy-screen: Add notifier support (v2)
Add support for privacy-screen consumers to register a notifier to
be notified of external (e.g. done by the hw itself on a hotkey press)
state changes.
Changes in v2:
- Drop WARN_ON(mutex_is_locked(&priv->lock)) check in
drm_privacy_screen_call_notifier_chain() it may be locked by
another thread, which would lead to a false-positive triggering
of the check
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-5-hdegoede@redhat.com
Diffstat (limited to 'include/drm/drm_privacy_screen_driver.h')
-rw-r--r-- | include/drm/drm_privacy_screen_driver.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/drm/drm_privacy_screen_driver.h b/include/drm/drm_privacy_screen_driver.h index 5187ae52eb03..24591b607675 100644 --- a/include/drm/drm_privacy_screen_driver.h +++ b/include/drm/drm_privacy_screen_driver.h @@ -54,6 +54,8 @@ struct drm_privacy_screen { struct mutex lock; /** @list: privacy-screen devices list list-entry. */ struct list_head list; + /** @notifier_head: privacy-screen notifier head. */ + struct blocking_notifier_head notifier_head; /** * @ops: &struct drm_privacy_screen_ops for this privacy-screen. * This is NULL if the driver has unregistered the privacy-screen. @@ -77,4 +79,6 @@ struct drm_privacy_screen *drm_privacy_screen_register( struct device *parent, const struct drm_privacy_screen_ops *ops); void drm_privacy_screen_unregister(struct drm_privacy_screen *priv); +void drm_privacy_screen_call_notifier_chain(struct drm_privacy_screen *priv); + #endif |